US20090173041A1 - Device and method of sealing packages - Google Patents

Device and method of sealing packages Download PDF

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Publication number
US20090173041A1
US20090173041A1 US12/315,623 US31562308A US2009173041A1 US 20090173041 A1 US20090173041 A1 US 20090173041A1 US 31562308 A US31562308 A US 31562308A US 2009173041 A1 US2009173041 A1 US 2009173041A1
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US
United States
Prior art keywords
sealing
sealing bar
bar
compressible
heat conducting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/315,623
Inventor
Konrad Moessnang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Assigned to MULTIVAC SEPP HAGGENMUELLER GMBH & CO. KG reassignment MULTIVAC SEPP HAGGENMUELLER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOESSNANG, KONRAD
Publication of US20090173041A1 publication Critical patent/US20090173041A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/12—Applying or generating heat or pressure or combinations thereof by resilient means, e.g. brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81453—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being made of flexible slats, flexible fins, flexible bristles or springs, e.g. coiled springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8163—Self-aligning to the joining plane, e.g. mounted on a ball and socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B29C66/92431—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
    • B29C66/92211—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power with special measurement means or methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/20—Inserts
    • B29K2105/206—Meshes, lattices or nets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Definitions

  • the present invention refers to a device and method of sealing packages.
  • validation of the packaging processes is required by the qualification department.
  • the validation is to ensure that the process having the same parameters always leads to the same result.
  • this pertains to the packaging machine itself.
  • One component to be validated is the sealing bar.
  • the sealing bar In order to assure the reproducibility of a sealing seam, the real process parameters of sealing time, sealing pressure and sealing temperature must agree with the input requirements.
  • the validation of the sealing time is possible just like that.
  • the sealing pressure can also be indirectly measured via a diaphragm exerting the pressure.
  • the sealing temperature can not be adjusted. The sealing temperature results from the sealing time, the remaining heat of the previous sealing operation, the ambient temperature, the electric resistance of the wire and the applied voltage. Direct presetting of the sealing temperature is not possible, since the small mass of the wire and the shortness of the sealing time do neither allow a measurement of the heating process nor a feedback control thereof. Therefore, sealing methods have been developed, which can be validated.
  • thermo-controlled (TC) method a solid aluminium profile is continuously heated.
  • the significant higher mass and the thermal buffer capacity being involved therewith can feedback control the sealing temperature with sufficient accuracy due to time mitigation.
  • this method creates acceptable sealing results.
  • sealing by means of a continuously heated sealing bar will be difficult due to the limited time frame of the process. If the product shall be packed by an automatic conveyor belt chamber machine, for instance, unavoidable crinkles in the sealing area result in a package which is not properly sealed. Since the heat must pass through all web layers during sealing on one side, either the upper layers get too hot and flow away or the lower layers are insufficiently heated, whereby the crinkles are not sealed through.
  • the realization of a reliable device for sealing above and below is, however, difficult with two sealing bars of aluminium, for instance.
  • the sealing bars must be accurately aligned to each other to be flush with each other when webs having a thickness of 100 ⁇ m or less are used, since the sealing pressure is not uniformly applied.
  • the sealing bars are formed concave or convex caused by the manufacture thereof so that gaps of 0.1 to 0.3 mm are created. This is not allowable in particular during sealing medical products.
  • the quality of the sealing seam shall be improved.
  • the manufacturing tolerances and the thermal deformations can be compensated for during the sealing operation by a metal meshwork provided at the sealing face.
  • the metallic material enables good heat conduction for optimum sealing. For instance, this is indispensable and required by law, respectively, for medical products to be packed. Since manufacturing of sealing bars does not need high demands in dimensional accuracy due to the following integration of the metal meshwork, the manufacturing of the sealing bars is considerably cheaper.
  • FIG. 1 a schematic overall view of a packaging machine embodied by a chamber machine
  • FIG. 2 a schematic cross-section view of a station for sealing above/below
  • FIG. 3 a a cross-sectional view of an upper and a lower sealing bar in a home position before sealing
  • FIG. 3 b a cross-section view of an upper and a lower sealing bar in a sealing position
  • FIG. 3 c a cross-sectional view of an upper and a lower sealing bar in the home position after sealing
  • FIG. 4 a a cross-sectional view of an upper sealing bar tilted about the Z-axis, and a lower sealing bar in a home position;
  • FIG. 4 b a cross-sectional view of an upper sealing bar tilted about the Z-axis, and a lower sealing bar in a sealing position;
  • FIG. 5 a a cross-sectional view of an uneven upper sealing bar and a lower sealing bar in a home position
  • FIG. 5 b a cross-sectional view of an uneven upper sealing bar and a lower sealing bar in a sealing position
  • FIG. 6 a a side view of an upper sealing bar tilted about the X-axis, and a lower sealing bar in a home position;
  • FIG. 6 b a side view of an upper sealing bar tilted about the X-axis, and a lower sealing bar in a sealing position;
  • FIG. 7 a a side view of an uneven upper sealing bar and a lower sealing bar in a home position
  • FIG. 7 b a side view of an uneven upper sealing bar and a lower sealing bar in a sealing position.
  • FIG. 1 shows a chamber machine 10 having a housing 11 , a chamber bottom 12 and a lid 13 .
  • a sealing member 15 cooperating with a counter-pressure member 14 by closing the lid 13 .
  • the sealing member 15 and the counter-pressure member 14 are described in more detail in FIGS. 2 to 7 .
  • the sealing member 15 corresponds to the first sealing bar 1
  • the counter-pressure member corresponds to a counter-bearing and a second sealing bar 2 , respectively.
  • FIG. 2 shows a cross-sectional view of the upper first sealing bar 1 having a first heating device 3 and the lower, second sealing bar 2 having a second heating device 4 .
  • the heating devices 3 , 4 extend in the shape of heating rods and tubular heating elements, respectively, over the entire length of the sealing bars 1 , 2 , and in the depicted example, they are provided in the sealing bars 1 , 2 .
  • the heat introduction is effected on both sides, which is particularly advantageous for reliable sealing of thick webs.
  • FIG. 2 In the enlarged view of FIG. 2 , there is shown the lower, second sealing bar 2 .
  • a compressible elastic material 5 in the shape of a metal meshwork 5 extending over the entire sealing face 9 .
  • a retaining strip 6 for instance a Teflon strip, which also extends over the entire sealing face 9 of the sealing bar.
  • the strip prevents the sealing bar from adhering on the package material and on the used web, respectively. Additionally, the strip 6 retains the metal meshwork in the desired form on the sealing bar.
  • the strip 6 can be fixed on the sealing bar by gluing, for instance.
  • the metal meshwork 5 can compensate for a plurality of form deviations and, hence, continuously provides a constant sealing pressure for ensuring the optimum quality of the sealing seams. It can be used in a woven form, for instance, i.e. with longitudinal and transverse fibres. Moreover, other embodiments such as fabric like steel wool are conceivable.
  • FIG. 3 a shows a cross-sectional view of the first sealing bar 1 and the second sealing bar 2 provided with the metal meshwork 5 in the home position, wherein both sealing bars are provided with the heating devices 3 , 4 , as it is already shown in FIG. 2 .
  • a package material 7 in the shape of a poach having a top web and a bottom web, for instance, which are sealed to each other during the sealing operation, as it is shown in FIG. 3 b .
  • a sealing seam 8 is created.
  • FIG. 3 c shows both sealing bars 1 , 2 in the initial position and in the home position, respectively, and the created sealing seam 8 .
  • the sealing bars 1 , 2 can be formed with a T-shaped cross-section, for instance. In this manner, the bars are stronger and apply a constant heat introduction into the package material to be sealed, thereby enhancing the quality of the sealing seam 8 .
  • FIGS. 4 a , 4 b show like FIGS. 3 a, b the first and the second sealing bars 1 , 2 in the home and sealing positions.
  • the first sealing bar 1 is tilted about the longitudinal axis thereof relative to the second sealing bar 2 , i.e. about the Z-axis.
  • FIG. 4 b shows how the metal meshwork 5 compensates for the tilting of the first sealing bar 1 during the sealing operation.
  • FIGS. 5 a , 5 b show like in FIGS. 4 a, b the first and the second sealing bar 1 , 2 in the home and sealing positions, respectively.
  • the first sealing bar 1 is unevenly formed due to manufacturing tolerances, for instance.
  • FIG. 5 b shows how the metal meshwork 5 compensates for the unevenness of the first sealing bar 1 during the sealing operation.
  • FIG. 6 a shows a side view of the first and the second sealing bars 1 , 2 .
  • the first sealing bar 1 is tilted in a vertical plane relative to the second sealing bar 2 , i.e. about the X-axis.
  • FIG. 6 b shows how the metal meshwork 5 compensates for the tilting of the first sealing bar 1 .
  • FIG. 7 a shows a side view of the first and the second sealing bars 1 , 2 .
  • the first sealing bar 1 is unevenly formed due to form tolerances, for instance.
  • FIG. 7 b shows how the metal meshwork 5 compensates for the unevenness of the first sealing bar 1 .
  • the present invention is not limited to the use of the metal meshwork. Instead of it, the use of other heat conducting materials such as specifically adapted plastics having heat conducting fillers or ceramics with good heat conductance such as aluminium nitride are conceivable.
  • the sealing bars are not limited to the T-shaped cross-sectional form. Any forms and shapes such as rectangle or triangular forms of the sealing bars are conceivable.
  • Teflon strip instead of a Teflon strip on the sealing bar, other components having anti-adhesive materials are conceivable. Instead of a strip, which is glued on the ceiling bar, other fixing mechanism such as rivets or clips are conceivable.
  • the invention is not limited to the use in chamber machines, either.
  • the device according to the present invention can be incorporated in any packaging machine such as a deep drawing machine, a thermo former or a chamber machine, where a sealing operation is carried out.

Abstract

A device for sealing packages comprises a sealing bar (1, 2). It is the object of the present invention to provide a sealing bar which solves the problems of lacking evenness of the sealing bar due to manufacturing tolerances. Advantageously, the quality of the sealing seam shall be enhanced. This object is solved by a compressible, heat conducting material (5) provided on the sealing bar (1, 2).

Description

  • The present invention refers to a device and method of sealing packages.
  • For instance, in the field of packages for medical aseptic goods, validation of the packaging processes is required by the qualification department. The validation is to ensure that the process having the same parameters always leads to the same result. Among other things, this pertains to the packaging machine itself. One component to be validated is the sealing bar. In order to assure the reproducibility of a sealing seam, the real process parameters of sealing time, sealing pressure and sealing temperature must agree with the input requirements.
  • In a prepared concept of pulse sealing, where a wire is heated by an electric current pulse, the validation of the sealing time is possible just like that. Moreover, the sealing pressure can also be indirectly measured via a diaphragm exerting the pressure. However, the sealing temperature can not be adjusted. The sealing temperature results from the sealing time, the remaining heat of the previous sealing operation, the ambient temperature, the electric resistance of the wire and the applied voltage. Direct presetting of the sealing temperature is not possible, since the small mass of the wire and the shortness of the sealing time do neither allow a measurement of the heating process nor a feedback control thereof. Therefore, sealing methods have been developed, which can be validated.
  • In such a thermo-controlled (TC) method, a solid aluminium profile is continuously heated. The significant higher mass and the thermal buffer capacity being involved therewith can feedback control the sealing temperature with sufficient accuracy due to time mitigation. For common package material of high quality, which is manually inserted into the machine without crinkles, this method creates acceptable sealing results. Using cheaper package materials, sealing by means of a continuously heated sealing bar will be difficult due to the limited time frame of the process. If the product shall be packed by an automatic conveyor belt chamber machine, for instance, unavoidable crinkles in the sealing area result in a package which is not properly sealed. Since the heat must pass through all web layers during sealing on one side, either the upper layers get too hot and flow away or the lower layers are insufficiently heated, whereby the crinkles are not sealed through.
  • An obvious solution as also used by the pulse sealing method is the use of a second sealing bar. The poach is heated both above and below.
  • The realization of a reliable device for sealing above and below is, however, difficult with two sealing bars of aluminium, for instance. The sealing bars must be accurately aligned to each other to be flush with each other when webs having a thickness of 100 μm or less are used, since the sealing pressure is not uniformly applied. In addition to the thermal deformation during operation, the sealing bars are formed concave or convex caused by the manufacture thereof so that gaps of 0.1 to 0.3 mm are created. This is not allowable in particular during sealing medical products.
  • It is the object of the present invention to provide a sealing bar which solves the above-mentioned problems caused by manufacturing tolerances. Advantageously, the quality of the sealing seam shall be improved.
  • This object is solved by the device according to claim 1. The object is also solved by the method according to claim 12. Further developments of the invention are indicated in the respective dependent claims.
  • By means of the sealing bar according to the invention, the manufacturing tolerances and the thermal deformations can be compensated for during the sealing operation by a metal meshwork provided at the sealing face. In addition to the desired flexibility for compensating for tolerances and tilting, the metallic material enables good heat conduction for optimum sealing. For instance, this is indispensable and required by law, respectively, for medical products to be packed. Since manufacturing of sealing bars does not need high demands in dimensional accuracy due to the following integration of the metal meshwork, the manufacturing of the sealing bars is considerably cheaper.
  • Further features and advantages of the invention are disclosed in the description of embodiments together with the enclosed drawings. In the Figures show:
  • FIG. 1 a schematic overall view of a packaging machine embodied by a chamber machine;
  • FIG. 2 a schematic cross-section view of a station for sealing above/below;
  • FIG. 3 a a cross-sectional view of an upper and a lower sealing bar in a home position before sealing;
  • FIG. 3 b a cross-section view of an upper and a lower sealing bar in a sealing position;
  • FIG. 3 c a cross-sectional view of an upper and a lower sealing bar in the home position after sealing;
  • FIG. 4 a a cross-sectional view of an upper sealing bar tilted about the Z-axis, and a lower sealing bar in a home position;
  • FIG. 4 b a cross-sectional view of an upper sealing bar tilted about the Z-axis, and a lower sealing bar in a sealing position;
  • FIG. 5 a a cross-sectional view of an uneven upper sealing bar and a lower sealing bar in a home position;
  • FIG. 5 b a cross-sectional view of an uneven upper sealing bar and a lower sealing bar in a sealing position;
  • FIG. 6 a a side view of an upper sealing bar tilted about the X-axis, and a lower sealing bar in a home position;
  • FIG. 6 b a side view of an upper sealing bar tilted about the X-axis, and a lower sealing bar in a sealing position;
  • FIG. 7 a a side view of an uneven upper sealing bar and a lower sealing bar in a home position;
  • FIG. 7 b a side view of an uneven upper sealing bar and a lower sealing bar in a sealing position.
    •
  • In the following, a first preferred embodiment of the present invention is described with reference to the figures on the basis of an example of a chamber machine.
  • FIG. 1 shows a chamber machine 10 having a housing 11, a chamber bottom 12 and a lid 13. In the lid 13, there is a sealing member 15 cooperating with a counter-pressure member 14 by closing the lid 13. In this manner, a poach can be sealed, for instance. The sealing member 15 and the counter-pressure member 14 are described in more detail in FIGS. 2 to 7. The sealing member 15 corresponds to the first sealing bar 1, and the counter-pressure member corresponds to a counter-bearing and a second sealing bar 2, respectively.
  • FIG. 2 shows a cross-sectional view of the upper first sealing bar 1 having a first heating device 3 and the lower, second sealing bar 2 having a second heating device 4. The heating devices 3, 4 extend in the shape of heating rods and tubular heating elements, respectively, over the entire length of the sealing bars 1, 2, and in the depicted example, they are provided in the sealing bars 1, 2. By using of two heated sealing bars 1, 2, the heat introduction is effected on both sides, which is particularly advantageous for reliable sealing of thick webs.
  • In the enlarged view of FIG. 2, there is shown the lower, second sealing bar 2. On the upper side thereof, there is a compressible elastic material 5 in the shape of a metal meshwork 5 extending over the entire sealing face 9. In this manner, an optimum sealing operation is achieved with constant sealing pressure irrespective of unevenness or form tolerances of the metal sealing bars 1, 2. Above the metal meshwork 5, there is a retaining strip 6, for instance a Teflon strip, which also extends over the entire sealing face 9 of the sealing bar. The strip prevents the sealing bar from adhering on the package material and on the used web, respectively. Additionally, the strip 6 retains the metal meshwork in the desired form on the sealing bar. The strip 6 can be fixed on the sealing bar by gluing, for instance.
  • The metal meshwork 5 can compensate for a plurality of form deviations and, hence, continuously provides a constant sealing pressure for ensuring the optimum quality of the sealing seams. It can be used in a woven form, for instance, i.e. with longitudinal and transverse fibres. Moreover, other embodiments such as fabric like steel wool are conceivable.
  • With reference to the FIGS. 3 to 7, the operation of the device and method according to the present invention is described as follows.
  • FIG. 3 a shows a cross-sectional view of the first sealing bar 1 and the second sealing bar 2 provided with the metal meshwork 5 in the home position, wherein both sealing bars are provided with the heating devices 3, 4, as it is already shown in FIG. 2. Between those sealing bars 1, 2, there is a package material 7 in the shape of a poach having a top web and a bottom web, for instance, which are sealed to each other during the sealing operation, as it is shown in FIG. 3 b. At the same time, a sealing seam 8 is created. FIG. 3 c shows both sealing bars 1, 2 in the initial position and in the home position, respectively, and the created sealing seam 8. The sealing bars 1, 2 can be formed with a T-shaped cross-section, for instance. In this manner, the bars are stronger and apply a constant heat introduction into the package material to be sealed, thereby enhancing the quality of the sealing seam 8.
  • FIGS. 4 a, 4 b show like FIGS. 3 a, b the first and the second sealing bars 1, 2 in the home and sealing positions. The first sealing bar 1 is tilted about the longitudinal axis thereof relative to the second sealing bar 2, i.e. about the Z-axis. FIG. 4 b shows how the metal meshwork 5 compensates for the tilting of the first sealing bar 1 during the sealing operation.
  • FIGS. 5 a, 5 b show like in FIGS. 4 a, b the first and the second sealing bar 1, 2 in the home and sealing positions, respectively. The first sealing bar 1 is unevenly formed due to manufacturing tolerances, for instance. FIG. 5 b shows how the metal meshwork 5 compensates for the unevenness of the first sealing bar 1 during the sealing operation.
  • FIG. 6 a shows a side view of the first and the second sealing bars 1, 2. The first sealing bar 1 is tilted in a vertical plane relative to the second sealing bar 2, i.e. about the X-axis.
  • FIG. 6 b shows how the metal meshwork 5 compensates for the tilting of the first sealing bar 1.
  • FIG. 7 a shows a side view of the first and the second sealing bars 1, 2. The first sealing bar 1 is unevenly formed due to form tolerances, for instance. FIG. 7 b shows how the metal meshwork 5 compensates for the unevenness of the first sealing bar 1.
  • The present invention is not limited to the use of the metal meshwork. Instead of it, the use of other heat conducting materials such as specifically adapted plastics having heat conducting fillers or ceramics with good heat conductance such as aluminium nitride are conceivable.
  • The sealing bars are not limited to the T-shaped cross-sectional form. Any forms and shapes such as rectangle or triangular forms of the sealing bars are conceivable.
  • Instead of a Teflon strip on the sealing bar, other components having anti-adhesive materials are conceivable. Instead of a strip, which is glued on the ceiling bar, other fixing mechanism such as rivets or clips are conceivable.
  • The invention is not limited to the use in chamber machines, either. The device according to the present invention can be incorporated in any packaging machine such as a deep drawing machine, a thermo former or a chamber machine, where a sealing operation is carried out.
  • The individual features of the disclosed embodiment can be freely combined with each other.

Claims (19)

1-17. (canceled)
18. A device for sealing of packages, comprising a first sealing bar having a sealing face and a compressible, heat conducting material provided on the sealing bar at the sealing face.
19. The device according to claim 18, wherein the material is elastic.
20. The device according to claim 18, wherein the material comprises a metal meshwork.
21. The device according to claim 18, further comprising a counter-bearing.
22. The device according to claim 18, further comprising a second sealing bar that is provided as a counter-bearing, wherein a sealing operation is performed therebetween.
23. The device according to claim 22, wherein each of the first sealing bar and the second sealing bar comprises a contact face adapted to receive a package material therebetween.
24. The device according to claim 22, wherein said second also comprises a compressible, heat conducting material.
25. The device according to claim 18, wherein the compressible, heat conducting material extends over the entire sealing face.
26. The device according to claim 18, wherein the compressible, heat conducting material has a side opposite to the sealing bar, and further comprising a strip on the side of the compressible, heat conducting material.
27. The device according to claim 26, wherein the strip comprises Teflon.
28. The device according to claim 18, wherein the first sealing bar comprises a heating device.
29. The device according to claim 22, wherein at least one of the first sealing bar and the second sealing bar comprises a heating device
30. A method of sealing packages, said method comprising: pressing a first sealing bar to a counter-bearing; and providing a compressible, heat conducting material on the first sealing bar.
31. The method according to claim 30, further comprising forming the counter-bearing with a second sealing bar.
32. The method according to claim 31, further comprising receiving a web between the first sealing bar and the second sealing bar.
33. The method according to claim 32, further comprising sealing the web over an entire surface of the sealing bar with a constant pressure.
34. The method according to claim 30, further comprising compensating for tilting and/or manufacturing tolerances of the sealing bars with the compressible, heat conducting material.
35. The method according to claim 30, further comprising provinding an elastic metal meshwork for the material.
US12/315,623 2007-12-19 2008-12-03 Device and method of sealing packages Abandoned US20090173041A1 (en)

Applications Claiming Priority (2)

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DE102007061245.3 2007-12-19
DE102007061245A DE102007061245A1 (en) 2007-12-19 2007-12-19 Device and method for sealing packages

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US20090173041A1 true US20090173041A1 (en) 2009-07-09

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EP (1) EP2111973B1 (en)
AT (1) ATE514546T1 (en)
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ES (1) ES2364621T3 (en)

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USD636890S1 (en) 2009-09-17 2011-04-26 Sands Innovations Pty. Ltd. Dispensing utensil
US8091242B2 (en) 2004-01-02 2012-01-10 Sands Innovations Pty Ltd Dispensing utensil
US8485360B2 (en) 2011-03-04 2013-07-16 Sands Innovations Pty, Ltd. Fracturable container
US8511500B2 (en) 2010-06-07 2013-08-20 Sands Innovations Pty. Ltd. Dispensing container
US8523016B2 (en) 2008-12-09 2013-09-03 Sands Innovations Pty Ltd. Dispensing container
US8919594B2 (en) 2007-01-31 2014-12-30 Sands Innovations Pty Ltd Dispensing container

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DE102012003111A1 (en) * 2012-02-16 2013-08-22 Multivac Sepp Haggenmüller Gmbh & Co. Kg Device for sealing packaging bags, has base structure made of specific material and provided with sealing surface, and preset material to cover specific material of base structure over sealing surface
CN103640256B (en) * 2013-11-27 2016-02-24 无锡鼎茂机械制造有限公司 Horizontal sealing material raising device

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US8091242B2 (en) 2004-01-02 2012-01-10 Sands Innovations Pty Ltd Dispensing utensil
US8528736B2 (en) 2004-01-02 2013-09-10 Sands Innovations Pty Ltd. Frangible container with hinge cover
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US8485360B2 (en) 2011-03-04 2013-07-16 Sands Innovations Pty, Ltd. Fracturable container

Also Published As

Publication number Publication date
EP2111973A3 (en) 2009-12-16
EP2111973B1 (en) 2011-06-29
DE102007061245A1 (en) 2009-06-25
ES2364621T3 (en) 2011-09-08
EP2111973A2 (en) 2009-10-28
ATE514546T1 (en) 2011-07-15

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