WO2009116739A2 - Ultra thin metal plate for switch button device and method of preparing the same - Google Patents
Ultra thin metal plate for switch button device and method of preparing the same Download PDFInfo
- Publication number
- WO2009116739A2 WO2009116739A2 PCT/KR2009/001165 KR2009001165W WO2009116739A2 WO 2009116739 A2 WO2009116739 A2 WO 2009116739A2 KR 2009001165 W KR2009001165 W KR 2009001165W WO 2009116739 A2 WO2009116739 A2 WO 2009116739A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal sheet
- ultra thin
- switch button
- button device
- metal plate
- Prior art date
Links
- 239000002184 metal Substances 0.000 title claims abstract description 172
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 33
- 229910052709 silver Inorganic materials 0.000 claims abstract description 30
- 239000004332 silver Substances 0.000 claims abstract description 30
- 238000009713 electroplating Methods 0.000 claims abstract description 22
- 239000011247 coating layer Substances 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 31
- 238000003825 pressing Methods 0.000 abstract description 18
- 239000000843 powder Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910000906 Bronze Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/02—Tubes; Rings; Hollow bodies
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/46—Electroplating: Baths therefor from solutions of silver
Definitions
- the present invention relates to an ultra thin metal plate for a switch button device being used in electronic equipments, and more particularly, to an ultra thin metal plate that improves quality of a switch button device by preventing separation of nickel or silver while pressing the ultra thin metal plate to form the switch button device and prevents damages of a mold or a pressing machine due to the separated nickel or silver powder by strongly attaching nickel or silver onto the surface of the ultra thin metal plate by electroplating, and a method of preparing the same.
- Such a small switch button device is configured to control or to switch on/off operation of equipment by engaging an integrated highly elastic metal plate with an electric contact of the equipment or disengaging the metal plate from the electric contact of the equipment.
- the switch button device is formed by setting a highly elastic metal tape heat-treated at 450 ⁇ 520°C in a pressing machine and pressing the metal tape with a mold.
- an ultra thin metal plate for a switch button device In order to improve electric characteristics of the switch button device, an ultra thin metal plate for a switch button device must be processed with a metal, such as stainless steel and phosphor bronze, in a form of sheet having a thickness 0.025 ⁇ 0.08 mm, heat-treated at 450 ⁇ 520°C to provide an high elasticity, and coated with nickel or silver.
- a metal such as stainless steel and phosphor bronze
- an ultra thin metal plate for a switch button device is produced by coating either surface or both surfaces of the highly elastic metal sheet having a thickness 0.025 ⁇ 0.08 mm with a spray of metal powder, and post-curing, to satisfy the above requirements.
- a conventional ultra thin metal plate for a switch button device may be easily produced by coating a surface of a metal sheet with a spray of metal powder.
- the metal powder is easily separated from the ultra thin metal plate while producing a switch button device by setting the ultra thin metal plate in a pressing machine and pressing the ultra thin metal plate with a mold, because bonding strength between the metal sheet and the metal powder coating is very low. If metal powder is separated from the ultra thin metal plate of switch button device, the quality of the produced switch button device deteriorates to a large extent and the production efficiency of the switch button device decreases greatly because it requires time and efforts to clean metal powder fixed to a mold or to a switch button device. Further, the metal powder separated from the ultra thin metal plate of the switch button device may damage the mold and give a bad influence to the pressing machine, and results in frequent breakdowns and short lifetime of the pressing machine.
- the present invention has been made in view of the above problems, and provides an ultra thin metal plate that prevents separation of nickel or silver while pressing process the ultra thin metal plate to form a switch button device by strongly attaching nickel or silver onto the surface of the ultra thin metal plate by electroplating, and a method of preparing the same.
- an ultra thin metal plate for a switch button device is formed by heat-treating a metal sheet of a rolled metal hot coil at a predetermined temperature, washing with an acid, forming a coating layer of nickel or silver on the surfaces of the metal sheet with electroplating, and slitting the metal sheet in a predetermined width.
- a method of preparing an ultra thin metal plate for a switch button device includes steps: forming a metal sheet by rolling a metal hot coil; forming an elastic metal sheet by heat-treating the metal sheet at a predetermined temperature to eliminate an internal stress from the metal sheet and to increase elasticity of the metal sheet; washing the elastic metal sheet with an acid to clean the surfaces of the elastic metal sheet and to form an oxide film on the surfaces of the elastic metal sheet; forming a coating layer by electroplating the surfaces of the acid-washed elastic metal sheet with nickel or silver; and slitting the elastic metal sheet having a coating layer in a predetermined width.
- the ultra thin metal plate for a switch button device produced according to the present invention nickel or silver is strongly attached to the surfaces of the ultra thin metal plate by electroplating. Therefore, the quality of the switch button device is greatly improved because nickel or silver is hardly separated from the ultra thin metal plate while pressing the ultra thin metal plate to form the switch button device, and the production efficiency of the switch button device is greatly increased because time and efforts to clean metal powder fixed to a mold or to the switch button device may be avoided.
- the ultra thin metal plate for a switch button device may prevent damages of a mold or a pressing machine caused by separated nickel or silver powder.
- An ultra thin metal plate for a switch button device is technically characterized that a coating layer is formed by electroplating a surface of a metal sheet with nickel or silver instead of spraying metal powder.
- the ultra thin metal plate as a base material of a switch button device is formed by rolling a metal hot coil of stainless steel or phosphor bronze in a predetermined thickness.
- the metal sheet formed by rolling a metal hot coil is in a hardened state due to its internal stress, and therefore the internal stress of the metal sheet must be eliminated to provide a high elasticity such that the ultra thin metal plate can be prepared suitable for a switch button device.
- the metal sheet is heat-treated at 450 ⁇ 520°C in a conventional method to eliminate the internal stress and to provide a high elasticity.
- the metal sheet is heat-treated at 450 ⁇ 520? in the conventional method, a high elasticity of the metal sheet may be obtained but undesired scales are formed on the surface of the metal sheet. If scales are formed on the surface of the elastic metal sheet, it becomes difficult to electroplate the elastic metal sheet uniformly due to interruption of the scales, and results in deterioration of the quality and durability of the ultra thin metal plate for a switch button device.
- the elastic metal sheet is washed with an acid such that an oxide film accelerating an electroplating effect is formed at the same time of eliminating the scales from the surface of the elastic metal sheet.
- a coating layer of nickel or silver is formed on the surfaces of the elastic metal sheet by electroplating the elastic metal sheet with nickel or silver.
- a coating layer of nickel or silver is formed on the surfaces of the elastic metal sheet by electroplating the elastic metal sheet with nickel or silver, the electroplated coating layer strongly attaches to the elastic metal sheet. Therefore, nickel or silver is hardly separated from the ultra thin metal plate while producing a switch button device by pressing the ultra thin metal plate made from the elastic metal sheet.
- the ultra thin metal plate for a switch button device is prepared by forming a coating layer of nickel or silver on the surfaces of the elastic metal sheet, slitting into a predetermined width, and winding onto a reel.
- the switch button device is manufactured by setting the ultra thin metal plate in a pressing machine and pressing the ultra thin metal plate with a mold.
- nickel or silver is hardly separated from the ultra thin metal plate, and thereby the quality and production efficiency of the switch button device are greatly improved because time and efforts to clean metal powder fixed to a mold or to a switch button device can be avoided.
- the method of preparing an ultra thin metal plate for a switch button device starts with a step of forming a metal sheet by rolling a metal hot coil (Step S10).
- the ultra thin metal plate as a base material of a switch button device is formed by rolling a metal hot coil of stainless steel or phosphor bronze.
- the ultra thin metal plate for a switch button device is prepared by using the metal sheet as a base material.
- the method of preparing an ultra thin metal plate for a switch button device includes a step of forming an elastic metal sheet by heat-treating the metal sheet at 450 ⁇ 520°C such that an internal stress of the metal sheet is eliminated and elasticity of the metal sheet is increased (Step S20).
- the metal sheet formed by rolling a metal hot coil at Step 10 is in a hardened state due to an internal stress generated by rolling. Therefore, the internal stress must be eliminated from the metal sheet and elasticity of the metal sheet must be increased to form an ultra thin metal plate suitable for a switch button device.
- the metal sheet is heat-treated at 450 ⁇ 520°C to provide the elastic metal sheet suitable for a switch button device by eliminating the internal stress of the metal sheet and improving the elasticity of the metal sheet.
- the method of preparing an ultra thin metal plate for a switch button device includes a step of washing with an acid to clean the surfaces of the elastic metal sheet and to form an oxide film on the surfaces of the elastic metal sheet (Step S30).
- Step S20 If the metal sheet is heat-treated at 450 ⁇ 520? at Step S20, a high elastic property is provided to the metal sheet but sales are formed on the surfaces of the metal sheet. If scales interrupting an electroplating effect of the elastic metal sheet are formed on the surfaces of the elastic metal sheet, it becomes difficult to electroplate the elastic metal sheet uniformly due to the scales, and results in deterioration of the quality and durability of the ultra thin metal plate for a switch button device.
- the elastic metal sheet is washed with an acid to form an oxide film accelerating an electroplating effect on the surfaces of the elastic metal sheet at the same time of eliminating scales from the elastic metal sheet.
- the method of preparing an ultra thin metal plate for a switch button device includes a step of forming a coating layer by electroplating the surfaces of the acid-washed elastic metal sheet with nickel or silver (Step S40).
- the elastic metal sheet becomes to have a characteristic that nickel or silver is hardly separated from the ultra thin metal plate while pressing the ultra thin metal plate made from the elastic metal sheet to form a switch button device.
- the method of preparing an ultra thin metal plate for a switch button device includes a step of slitting the elastic metal sheet having a coating layer in a predetermined width (Step S50).
- the ultra thin metal plate for a switch button device is produced by slitting the elastic metal sheet having a coating layer of nickel or silver formed at Step S40 and winding the slit elastic metal sheet onto a reel.
- the ultra thin metal plate for a switch button device is then set in a pressing machine and pressed with a mold to produce a switch button device.
- the quality of the switch button device is greatly improved because nickel or silver is not separated from the ultra thin metal plate and the production efficiency of the switch button device is greatly improved because time and efforts to clean metal powder fixed to a mold or to a switch button device are not required.
Abstract
The present invention relates to an ultra thin metal plate for a switch button device being used in electronic equipments. The ultra thin metal plate is formed by heat-treating a metal sheet of a rolled metal hot coil at a predetermined temperature, washing with an acid, forming a coating layer of nickel or silver on the surfaces of the metal sheet by electroplating, and slitting the metal sheet in a predetermined width. Nickel or silver is strongly attached to the surfaces of the ultra thin metal plate by electroplating. Therefore, quality of the switch button device is greatly improved because nickel or silver is hardly separated from the ultra thin metal plate while pressing the ultra thin metal plate to form a switch button device. Further, damages of a mold or a pressing machine caused by separated nickel or silver powder can be avoided.
Description
The present invention relates to an ultra thin metal plate for a switch button device being used in electronic equipments, and more particularly, to an ultra thin metal plate that improves quality of a switch button device by preventing separation of nickel or silver while pressing the ultra thin metal plate to form the switch button device and prevents damages of a mold or a pressing machine due to the separated nickel or silver powder by strongly attaching nickel or silver onto the surface of the ultra thin metal plate by electroplating, and a method of preparing the same.
As requirements for multifunction are gradually increasing in information technology equipments (such as a mobile phone, remote controller, digital camera, MP3, and navigator), medical equipments, precision machine tools, and electric home appliances (such as a television and a refrigerator), demand for switch buttons to be installed in the equipments is gradually increasing and the size of the switch button is being miniaturized.
Such a small switch button device is configured to control or to switch on/off operation of equipment by engaging an integrated highly elastic metal plate with an electric contact of the equipment or disengaging the metal plate from the electric contact of the equipment. The switch button device is formed by setting a highly elastic metal tape heat-treated at 450 ~ 520℃ in a pressing machine and pressing the metal tape with a mold.
In order to improve electric characteristics of the switch button device, an ultra thin metal plate for a switch button device must be processed with a metal, such as stainless steel and phosphor bronze, in a form of sheet having a thickness 0.025 ~ 0.08 ㎜, heat-treated at 450 ~ 520℃ to provide an high elasticity, and coated with nickel or silver. In a conventional method, an ultra thin metal plate for a switch button device is produced by coating either surface or both surfaces of the highly elastic metal sheet having a thickness 0.025 ~ 0.08 ㎜ with a spray of metal powder, and post-curing, to satisfy the above requirements.
A conventional ultra thin metal plate for a switch button device may be easily produced by coating a surface of a metal sheet with a spray of metal powder. However, the metal powder is easily separated from the ultra thin metal plate while producing a switch button device by setting the ultra thin metal plate in a pressing machine and pressing the ultra thin metal plate with a mold, because bonding strength between the metal sheet and the metal powder coating is very low. If metal powder is separated from the ultra thin metal plate of switch button device, the quality of the produced switch button device deteriorates to a large extent and the production efficiency of the switch button device decreases greatly because it requires time and efforts to clean metal powder fixed to a mold or to a switch button device. Further, the metal powder separated from the ultra thin metal plate of the switch button device may damage the mold and give a bad influence to the pressing machine, and results in frequent breakdowns and short lifetime of the pressing machine.
The present invention has been made in view of the above problems, and provides an ultra thin metal plate that prevents separation of nickel or silver while pressing process the ultra thin metal plate to form a switch button device by strongly attaching nickel or silver onto the surface of the ultra thin metal plate by electroplating, and a method of preparing the same.
In order to achieve the above object, an ultra thin metal plate for a switch button device according to an exemplary embodiment of the present invention is formed by heat-treating a metal sheet of a rolled metal hot coil at a predetermined temperature, washing with an acid, forming a coating layer of nickel or silver on the surfaces of the metal sheet with electroplating, and slitting the metal sheet in a predetermined width.
A method of preparing an ultra thin metal plate for a switch button device according to another exemplary embodiment of the present invention includes steps: forming a metal sheet by rolling a metal hot coil; forming an elastic metal sheet by heat-treating the metal sheet at a predetermined temperature to eliminate an internal stress from the metal sheet and to increase elasticity of the metal sheet; washing the elastic metal sheet with an acid to clean the surfaces of the elastic metal sheet and to form an oxide film on the surfaces of the elastic metal sheet; forming a coating layer by electroplating the surfaces of the acid-washed elastic metal sheet with nickel or silver; and slitting the elastic metal sheet having a coating layer in a predetermined width.
In the ultra thin metal plate for a switch button device produced according to the present invention, nickel or silver is strongly attached to the surfaces of the ultra thin metal plate by electroplating. Therefore, the quality of the switch button device is greatly improved because nickel or silver is hardly separated from the ultra thin metal plate while pressing the ultra thin metal plate to form the switch button device, and the production efficiency of the switch button device is greatly increased because time and efforts to clean metal powder fixed to a mold or to the switch button device may be avoided.
Further, the ultra thin metal plate for a switch button device according to the present invention may prevent damages of a mold or a pressing machine caused by separated nickel or silver powder.
An ultra thin metal plate for a switch button device according to the present invention is technically characterized that a coating layer is formed by electroplating a surface of a metal sheet with nickel or silver instead of spraying metal powder.
Firstly, the ultra thin metal plate as a base material of a switch button device is formed by rolling a metal hot coil of stainless steel or phosphor bronze in a predetermined thickness.
The metal sheet formed by rolling a metal hot coil is in a hardened state due to its internal stress, and therefore the internal stress of the metal sheet must be eliminated to provide a high elasticity such that the ultra thin metal plate can be prepared suitable for a switch button device.
For this, the metal sheet is heat-treated at 450 ~ 520℃ in a conventional method to eliminate the internal stress and to provide a high elasticity.
If the metal sheet is heat-treated at 450 ~ 520? in the conventional method, a high elasticity of the metal sheet may be obtained but undesired scales are formed on the surface of the metal sheet. If scales are formed on the surface of the elastic metal sheet, it becomes difficult to electroplate the elastic metal sheet uniformly due to interruption of the scales, and results in deterioration of the quality and durability of the ultra thin metal plate for a switch button device.
To solve the above problem, the elastic metal sheet is washed with an acid such that an oxide film accelerating an electroplating effect is formed at the same time of eliminating the scales from the surface of the elastic metal sheet.
If the elastic metal sheet is washed with an acid, scales interrupting an electroplating effect are eliminated from the elastic metal sheet and an oxide film accelerating the electroplating effect is formed on the surfaces of the elastic metal sheet.
After forming the oxide film, a coating layer of nickel or silver is formed on the surfaces of the elastic metal sheet by electroplating the elastic metal sheet with nickel or silver.
If a coating layer of nickel or silver is formed on the surfaces of the elastic metal sheet by electroplating the elastic metal sheet with nickel or silver, the electroplated coating layer strongly attaches to the elastic metal sheet. Therefore, nickel or silver is hardly separated from the ultra thin metal plate while producing a switch button device by pressing the ultra thin metal plate made from the elastic metal sheet.
The ultra thin metal plate for a switch button device according to the present invention is prepared by forming a coating layer of nickel or silver on the surfaces of the elastic metal sheet, slitting into a predetermined width, and winding onto a reel.
The switch button device is manufactured by setting the ultra thin metal plate in a pressing machine and pressing the ultra thin metal plate with a mold. In the process of manufacturing a switch button device with the ultra thin metal plate, nickel or silver is hardly separated from the ultra thin metal plate, and thereby the quality and production efficiency of the switch button device are greatly improved because time and efforts to clean metal powder fixed to a mold or to a switch button device can be avoided.
Hereinafter, a method of preparing an ultra thin metal plate for a switch button device is described in detail referring to exemplary embodiments of the present invention.
Firstly, the method of preparing an ultra thin metal plate for a switch button device according to the present invention starts with a step of forming a metal sheet by rolling a metal hot coil (Step S10).
The ultra thin metal plate as a base material of a switch button device is formed by rolling a metal hot coil of stainless steel or phosphor bronze.
The ultra thin metal plate for a switch button device is prepared by using the metal sheet as a base material.
The method of preparing an ultra thin metal plate for a switch button device according to the present invention includes a step of forming an elastic metal sheet by heat-treating the metal sheet at 450 ~ 520℃ such that an internal stress of the metal sheet is eliminated and elasticity of the metal sheet is increased (Step S20).
The metal sheet formed by rolling a metal hot coil at Step 10 is in a hardened state due to an internal stress generated by rolling. Therefore, the internal stress must be eliminated from the metal sheet and elasticity of the metal sheet must be increased to form an ultra thin metal plate suitable for a switch button device.
For this, the metal sheet is heat-treated at 450 ~ 520℃ to provide the elastic metal sheet suitable for a switch button device by eliminating the internal stress of the metal sheet and improving the elasticity of the metal sheet.
Further, the method of preparing an ultra thin metal plate for a switch button device according to the present invention includes a step of washing with an acid to clean the surfaces of the elastic metal sheet and to form an oxide film on the surfaces of the elastic metal sheet (Step S30).
If the metal sheet is heat-treated at 450 ~ 520? at Step S20, a high elastic property is provided to the metal sheet but sales are formed on the surfaces of the metal sheet. If scales interrupting an electroplating effect of the elastic metal sheet are formed on the surfaces of the elastic metal sheet, it becomes difficult to electroplate the elastic metal sheet uniformly due to the scales, and results in deterioration of the quality and durability of the ultra thin metal plate for a switch button device.
To solve the above problem, the elastic metal sheet is washed with an acid to form an oxide film accelerating an electroplating effect on the surfaces of the elastic metal sheet at the same time of eliminating scales from the elastic metal sheet.
If the elastic metal sheet is washed with an acid, scales interrupting an electroplating effect are eliminated from the surfaces of the elastic metal sheet and an oxide film accelerating the electroplating effect is formed on the surfaces of the elastic metal sheet.
Further, the method of preparing an ultra thin metal plate for a switch button device according to the present invention includes a step of forming a coating layer by electroplating the surfaces of the acid-washed elastic metal sheet with nickel or silver (Step S40).
By electroplating the surfaces of the elastic metal sheet having an oxide film formed at Step S30 with nickel or silver, a coating layer of nickel or silver is formed on the surfaces of the elastic metal sheet.
If a coating layer of nickel or silver is formed by electroplating the elastic metal sheet with nickel or silver, the electroplated coating layer strongly fixes to the elastic metal sheet. Therefore, the elastic metal sheet becomes to have a characteristic that nickel or silver is hardly separated from the ultra thin metal plate while pressing the ultra thin metal plate made from the elastic metal sheet to form a switch button device.
Further, the method of preparing an ultra thin metal plate for a switch button device according to the present invention includes a step of slitting the elastic metal sheet having a coating layer in a predetermined width (Step S50).
The ultra thin metal plate for a switch button device according to the present invention is produced by slitting the elastic metal sheet having a coating layer of nickel or silver formed at Step S40 and winding the slit elastic metal sheet onto a reel.
The ultra thin metal plate for a switch button device is then set in a pressing machine and pressed with a mold to produce a switch button device. For a process of manufacturing a switch button device with the ultra thin metal plate, the quality of the switch button device is greatly improved because nickel or silver is not separated from the ultra thin metal plate and the production efficiency of the switch button device is greatly improved because time and efforts to clean metal powder fixed to a mold or to a switch button device are not required.
Although exemplary embodiments of the present invention have been described in detail hereinabove, it should be understood that many variations and modifications of the basic inventive concept herein described, which may appear to those skilled in the art, will still fall within the spirit and scope of the exemplary embodiments of the present invention as defined in the appended claims.
Claims (2)
- An ultra thin metal plate for a switch button device, prepared by heat-treating a metal sheet of a rolled metal hot coil at 450 ~ 520℃, washing with an acid, forming a coating layer of nickel or silver on the surfaces of the metal sheet with electroplating, and slitting the metal sheet in a predetermined width.
- A method of preparing an ultra thin metal plate for a switch button device, comprising:forming a metal sheet by rolling a metal hot coil;forming an elastic metal sheet by heat-treating the metal sheet at 450 ~ 520℃ to eliminate an internal stress from the metal sheet and to increase elasticity of the metal sheet;washing with an acid to clean the surfaces of the elastic metal sheet and to form an oxide film on the surfaces of the elastic metal sheet;forming a coating layer by electroplating the surfaces of the acid-washed elastic metal sheet with nickel or silver; andslitting the elastic metal sheet having a coating layer in a predetermined width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009801090271A CN101978448A (en) | 2008-03-18 | 2009-03-09 | Ultra thin metal plate for switch button device and method of preparing the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080024690A KR100851660B1 (en) | 2008-03-18 | 2008-03-18 | Metal ultra thin plate for a switch button device and preparing method the same |
| KR10-2008-0024690 | 2008-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2009116739A2 true WO2009116739A2 (en) | 2009-09-24 |
| WO2009116739A3 WO2009116739A3 (en) | 2009-12-17 |
Family
ID=39881582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2009/001165 WO2009116739A2 (en) | 2008-03-18 | 2009-03-09 | Ultra thin metal plate for switch button device and method of preparing the same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100851660B1 (en) |
| CN (1) | CN101978448A (en) |
| WO (1) | WO2009116739A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100979999B1 (en) | 2010-03-10 | 2010-09-03 | 여인기 | Manufacuring method of strip for metal dome having aluminum layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1573008A (en) * | 1975-12-19 | 1980-08-13 | Mccord Corp | Metallized flexible plastics automobile trimcomponent |
| JP3159592B2 (en) * | 1993-07-23 | 2001-04-23 | ダイワ精工株式会社 | Article having a metal decoration layer |
| KR19980083821A (en) * | 1997-05-19 | 1998-12-05 | 서상기 | Metal thin film manufacturing apparatus and method for shielding electromagnetic waves by sputtering method |
| DE60010604T2 (en) * | 1999-09-17 | 2005-05-19 | Topy Kogyo K.K. | Glossy surface structure and process for its preparation |
| US6562165B1 (en) | 2000-08-15 | 2003-05-13 | S.C. Johnson Home Storage, Inc. | Method for laminating closure member to film web |
| JP2007103586A (en) | 2005-10-03 | 2007-04-19 | Nitto Denko Corp | Method for manufacturing wiring circuit board |
-
2008
- 2008-03-18 KR KR1020080024690A patent/KR100851660B1/en not_active IP Right Cessation
-
2009
- 2009-03-09 CN CN2009801090271A patent/CN101978448A/en active Pending
- 2009-03-09 WO PCT/KR2009/001165 patent/WO2009116739A2/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009116739A3 (en) | 2009-12-17 |
| CN101978448A (en) | 2011-02-16 |
| KR100851660B1 (en) | 2008-08-13 |
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