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Metal press-key

A key and metal technology, applied in the directions of wax adhesives, adhesives, electrical components, etc., can solve the problems of complex key technology, and achieve the effects of simple preparation process, good wear resistance, and good surface wear resistance.

Inactive Publication Date: 2009-05-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of the complex process of preparing metal-like and wear-resistant buttons in the prior art, and provide a metal-like and wear-resistant metal button with a simple preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] The preparation method of the metal key provided by the invention includes processing metal powder into key material, polishing, laser engraving or etching and glue filling. The button material processed by powder metallurgy is prepared according to the following steps: after uniformly mixing the metal powder with a volume ratio of 55-80:20-45 and the adhesive, injecting the obtained mixture to form a button blank, and then The obtained button blank is subjected to degreasing treatment, sintering, and finally polishing. Wherein, the condition for uniformly mixing the metal powder and the binder may be, for example, mixing at a temperature of 165-180° C. for 1-3 hours.

[0013] The binder can be a compound or composition that binds metal powder particles, has rheology and lubricity when heated in the barrel of an injection molding machine, can drive the metal powder to flow, and can be removed through a degreasing process.

[0014] According to a specific embodiment of ...

Embodiment 1

[0022] This embodiment is used to illustrate the metal key provided by the present invention and its preparation method.

[0023] 1) Prepare button material

[0024] A: prepare bonding agent: with the ethylene-vinyl acetate copolymer (weight average molecular weight 2000) of 5 weight parts, the paraffin wax of 70 weight parts, the carnauba wax of 5 weight parts, the high-density polyethylene (density 9.50 of density polyethylene) of 10 weight parts g / cm3, weight-average molecular weight 500,000) and the stearic acid of 10 weight parts mixed 3 hours at 160 ℃ of temperature, obtain binding agent;

[0025] B: Mix the stainless steel powder with the binder: at 165°C, mix the stainless steel powder with an average particle size of 25 microns and the binder prepared in step A at a volume ratio of 55:45 for 3 hours;

[0026] C: Injection molding: injection molding the mixture of the stainless steel powder and the binder at an injection temperature of 130°C, an injection pressure of ...

Embodiment 2

[0033] This embodiment is used to illustrate the metal key provided by the present invention and its preparation method.

[0034] Prepare the metal button according to the method described in Example 1, the difference is that ion plating is carried out between step 2) and step 3) of Example 1, and a layer of 2 microns is plated on the surface of the button material with a smooth surface by ion plating Thick chromium nitride film, ion plating conditions: temperature is 500°C, vacuum is 3.2×10 -1 Pa, the flow rate of nitrogen gas is 0.035 liters per minute, the flow rate of argon gas is 17 milliliters per minute, the voltage is 500 volts, the current is 20 amps, and the time is 10 minutes.

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PUM

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Abstract

The invention provides a metal key-press which comprises key-press material and patterns or characters positioned on the key-press material, wherein the key-press material is made of metal powders through a powder metallurgy method, and the Rockwell hardness of the key-press material is HRC20-40. In the invention, as the key-press is metallically prepared by metal powders, the produced key-press has metal texture and is resistant in abrasion; besides, as the metallic coating step is not needed by the metal key-press, the preparation technology is simple.

Description

technical field [0001] The invention relates to a metal button. technical background [0002] At present, the key materials of electronic products mainly include rubber materials, plastic materials and metal materials. Buttons directly made of rubber materials, etc., have poor appearance and texture; buttons made directly of plastic materials, etc., have better appearance, texture and feel, but not as good as metal buttons. [0003] In order to make the buttons made of plastic materials have a metallic texture and a better feel, some researchers increase the metal layer by electroplating on the surface of buttons made of plastic materials, such as CN1208884A discloses electroplating metal on the main body of plastic buttons; Metal buttons cannot be electroplated directly. Therefore, if you want to make the rubber buttons have a metallic texture, you must coat a layer of interface layer on the rubber body before electroplating. [0004] CN2687816Y discloses that an interfac...

Claims

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Application Information

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IPC IPC(8): H01H13/14H01H11/00B22F1/00B22F3/10B29C45/00C09J191/06B29K305/00C09J123/08C09J123/06
Inventor 汤潇
Owner BYD CO LTD
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