WO2009076794A1 - 超薄型弹性按键之加工方法 - Google Patents

超薄型弹性按键之加工方法 Download PDF

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Publication number
WO2009076794A1
WO2009076794A1 PCT/CN2007/071250 CN2007071250W WO2009076794A1 WO 2009076794 A1 WO2009076794 A1 WO 2009076794A1 CN 2007071250 W CN2007071250 W CN 2007071250W WO 2009076794 A1 WO2009076794 A1 WO 2009076794A1
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WIPO (PCT)
Prior art keywords
film
plastic film
processing
elastic
cut
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PCT/CN2007/071250
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English (en)
French (fr)
Inventor
Yisong Bai
Original Assignee
Dongguan Memtech Electronic Products Co., Ltd
Memtech International Ltd
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.)
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Publication date
Application filed by Dongguan Memtech Electronic Products Co., Ltd, Memtech International Ltd filed Critical Dongguan Memtech Electronic Products Co., Ltd
Priority to US12/306,645 priority Critical patent/US8409392B2/en
Priority to CN200780015539.2A priority patent/CN101573234B/zh
Priority to PCT/CN2007/071250 priority patent/WO2009076794A1/zh
Publication of WO2009076794A1 publication Critical patent/WO2009076794A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2375/00—Polyureas; Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/036—Minimise height
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1026—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina with slitting or removal of material at reshaping area prior to reshaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1054—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing and simultaneously bonding [e.g., cut-seaming]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1074—Separate cutting of separate sheets or webs

Definitions

  • the present invention relates to a button processing process, and more particularly to a method for processing an ultra-thin flexible button, and in particular, a method for processing a button having an elastic film, a silicone film, and a plastic film.
  • the mobile phone button is one of the indispensable parts of the mobile phone product.
  • the overall thickness after assembly with the bottom silicone is about 4mm, or even thicker, which makes the mobile phone more cumbersome after installation. Not conducive to carrying. Therefore, in order to meet the above requirements of thinness and flexibility, the industry often involves the use of various plastic materials, especially the application of TPU materials (ThermoplasticUrethene Chinese is a thermoplastic amine polycarboxylate), plastic materials (Polycarbonate) combined with silica gel to form buttons.
  • TPU materials ThermoplasticUrethene Chinese is a thermoplastic amine polycarboxylate
  • plastic materials Polycarbonate
  • the main object of the present invention is to provide a method for processing an ultra-thin elastic button, which is simple in processing and low in cost.
  • [8] 1 piece Firstly, the processed plastic film is slit by a automatic cutting machine and then cut into a single piece of plastic film;
  • [II] 4 printing printing the pattern or text on the front side of the plastic film after punching, and then printing the bonding agent;
  • [12] 5 coated silica gel Applying silicone on the front side of the plastic film to complete the processing of the plastic film;
  • the elastic film has a glossy surface on the front surface of the elastic film.
  • the invention has the advantages that it is mainly completed by a simple process such as printing, punching and oil pressing, and has no ordinary P + R spraying process and bad process, no molding of the IMD product is poorly deformed, and no silicone product is poorly sprayed and cut. There is no complicated and complicated process, and the mold involved only needs less equipment such as hydraulic die and die, so that the amount of personnel and site input is small; therefore, the process of the invention is simple and low in cost.
  • Figure 1 is a schematic diagram of the process flow of the present invention.
  • a method for processing an ultra-thin elastic button is as follows:
  • the single film processing step of the plastic film is as follows, wherein the plastic film in this embodiment is selected from a PC film:
  • Cut piece 10 It uses a automatic cutting machine to separate a certain thickness of the PC film, and then use another cut The tablet is cut into a single piece of PC film for easy processing.
  • Pre-shrinking 11 pre-shrinking the above-mentioned cut PC film to increase the adhesion of the film surface and ensuring that the printing ink does not fall off; it can avoid the product size deviation due to high temperature deformation, because the substances have The physical characteristics of thermal expansion and contraction, before the product is pre-shrinked, the printed product can eliminate serious deviation, improve yield, reduce cost and increase profit margin.
  • Punching 12 The pre-shrinked PC film is sent into the punching machine to cut out the printing positioning hole; the punching film placement position is not very accurate, the main film can be within the die range, because the positioning hole is in the Printing after molding in the film area will not be biased.
  • Printing 13 After punching, first print black characters on the back of the plastic film, splash the metal layer or print different metal effects, print the cover oil, print the black oil on the metal layer, Treatment and print the background color, then print the pattern or text on the front side of the PC film, and then print the bonding agent; the black characters in the sleeve are mainly to make the key surface more shading, and the black ribs on the front side of the customer can be completed. And leave the ring-shaped part around the hollow characters, ribs and navigation keys; Sputtering is mainly to process the metal layer (such as aluminum layer) onto the plastic film (ring type, etc.) to achieve the high-strength metallic effect of the ribs.
  • the metal layer such as aluminum layer
  • printing gland oil is mainly to cover the ring part to protect against deplating; printing black oil can set off the metal layer (aluminum layer), so that the metal layer (aluminum layer) From the front, the brightness is higher, and the same function of protecting the gland oil and the coating.
  • the deplating is mainly to remove all the parts except the ring type that need to be retained (ie, corrosion).
  • the printing white background mainly processes the characters into white, which can be made into various colors according to customer requirements, and achieves the light transmission effect; the printing bonding agent mainly adds a layer between the front surface of the PC film and the silicone. Adhesive, for bonding, because silicone and plastic film cannot be directly bonded.
  • Coated silica gel 14 Apply silicone to the bonding agent on the front side of the PC film and scrape it with a tool (such as a knife) to complete the processing of the PC film.
  • the elastic film monolithic processing step is as follows, wherein the elastic film in this embodiment is selected by using a TPU film:
  • Panel 20 The front surface of the TPU film is made of a glossy surface material with a protective film; then the TPU film is processed by a automatic film cutting machine to cut a TPU film of a certain thickness and then cut into a TPU film single piece. The process is the same as in (I) and will not be described here.
  • Pre-shrink 21 The above-mentioned cut TPU film is pre-shrinked in a single piece; the purpose is the same as the processing method in (I), which will not be described here.
  • Printing 22 The pre-shrinked TPU film is printed on the back side of the TPU film so that the TPU film can be connected to the silica gel. After the printing is completed, the TPU film is processed in a single piece.
  • the film monolithic and TPU film monolithic of course, the above (I), ( ⁇ ) two preparations can be done first or later.
  • Fitting 30 The side on which the PC film is printed with the bonding agent and coated with the silicone and the side of the TPU film printed with the bonding agent are attached to each other, which can be hand-applied.
  • Oil pressure 31 After lamination, it is sent to a hydraulic equipment that has been preheated to a certain temperature for hot forming; in which the mold temperature is heated to a predetermined temperature before the oil pressure, the oil pressure positioning hole will be fitted.
  • the PC film single piece and the TPU film are individually placed on the positioning holes, and then the protective film on the front side of the TPU film is peeled off, and then the mold is closed, and the mold is pressed, and the film is automatically pressed and formed by the oil pressure machine.
  • the oil pressure process allows different surface effects to be achieved with different mold faces. For example, it can be combined with printed patterns to produce a variety of stereoscopic effects (flower shapes, figures, buildings, etc.). In short, the surface technology of the ultra-thin button technology is ever-changing, and customers can choose a variety of different effects according to their own needs.
  • Punching 32 Mainly, the burrs of the edge of the semi-finished product after the above-mentioned oil pressure are punched through a specific die by a punching machine; thereby completing the processing of the button of the present invention.

Description

说明书 超薄型弹性按键之加工方法
#細或
[I] 本发明涉及一种按键加工工艺， 尤其是指一种超薄型弹性按键之加工方法， 具 体而言， 尤其是一种兼具弹性薄膜、 硅胶以及塑料薄膜的按键之加工方法。
[2] 在当前各手机制造商越来越追求高难度、 高技术含量、 高表面花样的今天， 产 品需要不断推陈出新， 其既要唤起消费者的购买欲， 又要造价低， 效益好， 如 此产品才能永续生产。
[3] 手机按键则是手机产品不可或缺的零件之一， 目前由于其 K E Y型较高， 在与 底硅胶组装后其整体厚度约在 4mm左右， 甚至更厚， 导致手机装机后较为笨重 ， 不利于携带。 因此， 为达到上述轻薄和弹性之需求， 业界常常会涉及使用各 种塑胶材料， 尤其是市面上应用 TPU材料 （ThermoplasticUrethene中文为热塑性 基胺聚甲酸酯） 、 塑料材料 （Polycarbonate) 结合硅胶形成按键， 其传统做法会 涉及到诸如普通 P十 R的喷涂工序或 I M D产品的成型或硅胶产品的喷涂切割 等复杂繁多的工序， 使制作成本居高不下， 并且不良率也较高， 不利于市场竞 争。
[4] 本发明主要目的在于提供一种超薄型弹性按键之加工方法， 其加工简单、 成本 低。
[5] 为实现上述之目的， 本发明釆取如下技术方案：
[6] 一种超薄型弹性按键之加工方法， 其中：
[7] (I) 塑料薄膜单片加工步聚如下：
[8] ①裁片： 先利用自动裁片机将加工的塑料薄膜分条后再切割成塑料薄膜单片；
[9] ②预缩： 将上述切割好的塑料薄膜单片进行预缩；
[10] ③冲孔： 预缩后的塑料薄膜单片送入冲床内切出印刷定位孔；
[I I] ④印刷： 在冲孔后的塑料薄膜单片正面先印刷图案或文字， 再印上结合剂； [12] ⑤涂硅胶： 在塑料薄膜单片正面的结合剂上涂上硅胶即完成塑料薄膜单片的加 工；
[13] (Π) 弹性薄膜单片加工步聚如下：
[14] ①裁片： 先利用自动裁片机将加工的弹性薄膜分条后再切割成弹性薄膜单片；
[15] ②预缩： 将上述切割好的弹性薄膜单片进行预缩；
[16] ③印刷： 预缩后的弹性薄膜单片背面印刷结合剂即完成弹性薄膜单片加工；
[17] (m) 成型按键
[18] ①备料： 准备上述加工好的塑料薄膜单片和弹性薄膜单片；
[19] ②贴合： 将塑料薄膜单片上印刷结合剂并涂有硅胶的那面和弹性薄膜单片上印 刷结合剂的那面相向贴合在一起；
[20] ③油压： 贴合后一并送入已预热一定温度的油压设备中热压成型；
[21] ④冲切： 成型后的半成品送入冲床中切除毛边即可。
[22] 上述塑料薄膜单片加工步骤④中， 可根据市场需求加工出各种工艺效果， 如预 先在塑料薄膜单片背面依次印套黑字符、 溅渡金属层面或者印刷不同的金属效 果、 印上用于衬托金属层面的黑油、 退渡以及印刷底色等等。
[23] 上述弹性薄膜单片加工步聚中弹性薄膜正表面为光亮面效果。
[24] 本发明之优点在于主要利用印刷、 冲切及油压等简单工艺完成， 无普通 P + R 的喷涂烦琐工序及不良， 无 I M D产品的成型偏位不良， 无硅胶产品的喷涂切 割不良， 无复杂繁多的工序， 并且所涉及模具也只需油压模及冲模等较少设备 进实施， 使得人员及场地投入量少； 因此本发明之工艺简单、 成本低。
國删
[25] 图 1本发明工艺流程示意图。
難
[26] 下面结合附图与具体实施方式对本发明作进一步描述。
[27] 一种超薄型弹性按键之加工方法如下：
[28] (I) 塑料薄膜单片加工步聚如下， 其中本实施例中塑料薄膜选用 PC薄膜进行 说明：
[29] 裁片 10: 其先用一自动裁片机将一定厚度的 PC薄膜分条， 然后再用另外一台裁 片机切割成 PC薄膜单片， 以方便加工。
[30] 预缩 11 : 将上述切割好的 PC薄膜单片进行预缩， 以增加薄膜表面的附着力，保 证印刷油墨不脱落； 可以避免产品因高温变形导致产品尺寸有偏差， 因为物质 都有热胀冷缩的物理特性， 在产品印刷前先将产品预缩， 则印刷后产品就可以 杜绝严重的偏位现象， 提高良品率，降低成本， 增加利润率。
[31] 冲孔 12: 预缩后的 PC薄膜单片送入冲床内切出印刷定位孔； 冲孔吋薄膜放置位 置不用很准确， 主要薄膜在冲模范围之内即可， 因定位孔一旦在薄膜区域内成 型后印刷就不会有偏位的现象。
[32] 印刷 13: 在冲孔后， 先在塑料薄膜单片背面依次印套黑字符、 溅渡金属层面或 者印刷不同的金属效果、 印压盖油、 印用于衬托金属层面的黑油、 退渡以及印 刷底色， 然后在 PC薄膜单片正面印刷图案或文字， 再印上结合剂； 其中印套黑 字符主要是使键面更加遮光， 另外可以完成客户要求的正面筋条黑色效果， 并 留出空心字符、 筋条和导航键周围的环型部分； 溅镀主要是将金属层 （例如铝 层） 加工到塑料薄膜上 (环型等位置)， 以达到筋条高亮金属感效果， 给人以 '眼前 一亮'的感觉； 印刷压盖油主要是将环型部分遮盖保护， 防止退镀； 印刷黑油可 以衬托金属层 （铝层） ， 使溅镀金属层 （铝层） 从正面视觉上感觉亮度更高， 同吋也有保护压盖油和镀层的作用； 退镀主要是将除环型部分需要保留以外的 其它部分全部退掉 （即腐蚀溶解） ； 印刷白底主要是将字符部分加工成白色， 其中可根据客户要求做成各种颜色， 并达到透光效果； 印刷结合剂主要是在 PC 薄膜单片正面与硅胶之间增加一层粘合剂， 起连接作用， 因硅胶与塑料薄膜不 能直接粘合。
[33] 涂硅胶 14: 在 PC薄膜单片正面的结合剂上涂上硅胶， 并且用工具 （如小刀） 刮 平， 即完成 PC薄膜单片的加工；
[34] (Π) 弹性薄膜单片加工步聚如下， 其中本实施例中弹性薄膜选用 TPU薄膜进 行说明：
[35] 裁片 20: 选用 TPU薄膜正面为光亮面材料， 并附有保护膜； 然后将 TPU薄膜利 用自动裁片机将加工一定厚度的 TPU薄膜分条后再切割成 TPU薄膜单片， 其工艺 同 （I) 中加工方法， 在此不加予阐述。 [36] 预缩 21 : 将上述切割好的 TPU薄膜单片进行预缩； 其目的同 (I)中加工方法， 在 此不加予阐述。
[37] 印刷 22: 预缩后的 TPU薄膜单片背面印刷结合剂， 以使 TPU薄膜与硅胶之间能 够连接； 印刷完成后即完成 TPU薄膜单片加工。
[38] (m) 成型按键
[39] 备料： 准备上述加工好的 PC
薄膜单片和 TPU薄膜单片； 当然上述 （I) 、 (Π) 两准备可先可后， 也可以是同 步进行。
[40] 贴合 30: 将 PC薄膜单片上印刷结合剂并涂有硅胶的那面和 TPU薄膜单片上印刷 有结合剂的那面相向贴合在一起， 其可釆用手工贴法。
[41] 油压 31 : 贴合后一并送入已预热一定温度的油压设备中热压成型； 其中油压前 将模具温度加热到预定温度， 利用油压定位孔将贴合好的 PC薄膜单片和 TPU薄 膜单片套到定位孔上， 再将 TPU薄膜正面的保护膜剥离， 然后合上模具， 入模， 油压机会自动将薄膜片热压成型。 利用油压工艺可通过不同的模面可以实现不 同的表面效果， 例如可以与印刷图案相结合加工成各种各样的立体效果 （花形 、 人物、 建筑物等） 。 总之， 超薄按键工艺的表面工艺是千变万化的， 客户可 以根据自身的需求任意选用各种不同的效果。
[42] 冲切 32: 主要是将上述油压后的半成品边缘的毛边利用冲床通过特定的模具冲 切开； 进而完成本发明按键之加工。
[43] 以上所述， 仅是本发明较佳实施例而已， 并非对本发明的技术范围作任何限制
， 故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、 等同变化 与修饰， 均仍属于本发明技术方案的范围内。

Claims

权利要求书
[1] 1、 一种超薄型弹性按键之加工方法， 其特征在于：
(I) 塑料薄膜单片加工步聚如下：
①裁片： 先利用自动裁片机将加工的塑料薄膜分条后再切割成塑料薄膜单 片；
②预缩： 将上述切割好的塑料薄膜单片进行预缩；
③冲孔： 预缩后的塑料薄膜单片送入冲床内切出印刷定位孔；
④印刷： 在冲孔后的塑料薄膜单片正面先印刷图案或文字， 再印上结合剂
⑤涂硅胶： 在塑料薄膜单片正面的结合剂上涂上硅胶即完成塑料薄膜单片 的加工；
(Π) 弹性薄膜单片加工步聚如下：
①裁片： 先利用自动裁片机将加工的弹性薄膜分条后再切割成弹性薄膜单 片；
②预缩： 将上述切割好的弹性薄膜单片进行预缩；
③印刷： 预缩后的弹性薄膜单片背面印刷结合剂即完成弹性薄膜单片加工
(m) 成型按键
①备料： 准备上述加工好的塑料薄膜单片和弹性薄膜单片；
②贴合： 将塑料薄膜单片上涂有硅胶的那面和弹性薄膜单片上印刷有结合 剂的那面相向贴合在一起；
③油压： 贴合后一并送入已预热一定温度的油压设备中热压成型；
④冲切： 成型后的半成品送入冲床中切除毛边即可。
[2] 2、 根据权利要求 1所述的超薄型弹性按键之加工方法， 其特征在于： 上述 塑料薄膜单片加工步骤④中， 可预先在弹性薄膜单片背面依次印套黑字符
、 溅渡金属层面或者印刷不同的金属效果、 印上用于衬托金属层面的黑油 、 退渡以及印刷底色， 然后再处理塑料薄膜单片。
[3] 3、 根据权利要求 1所述的超薄型弹性按键之加工方法， 其特征在于： 上述 弹性薄膜单片加工步聚中弹性薄膜正表面为光亮面。
[4] 4、 根据权利要求 1至 3中任何一项所述的超薄型弹性按键之加工方法， 其特 征在于： 上述弹性薄膜选用 TPU材料。
[5] 5、 根据权利要求 1至 3中任何一项所述的超薄型弹性按键之加工方法， 其特 征在于： 上述塑料薄膜选用 PC材料。
PCT/CN2007/071250 2007-12-17 2007-12-17 超薄型弹性按键之加工方法 WO2009076794A1 (zh)

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