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An integrated surface treatment method of titanium metal and plastic and its composite product

A surface treatment and titanium metal technology, applied in the field of innovative surface treatment, can solve problems such as easy degumming and separation, generation of porous bonding layer, and weak bonding of titanium metal substrates, so as to meet the requirements of integration, ensure bonding strength, and overcome the surface Strong activity and easy oxidation effect

Active Publication Date: 2020-08-18
深圳市睿昌盛精密科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] (2) Titanium alloy anodization: The characteristic is that it cannot form a nano-scale porous bonding layer during anodic oxidation like aluminum alloy, and the surface activity is very poor, and because the chemical properties of the titanium metal surface are extremely active, the oxidized bonding layer formed and titanium The metal substrate is not firmly bonded, so there is basically no bonding force between titanium and plastic after injection molding, and it is easy to degumming and separation

Method used

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  • An integrated surface treatment method of titanium metal and plastic and its composite product
  • An integrated surface treatment method of titanium metal and plastic and its composite product
  • An integrated surface treatment method of titanium metal and plastic and its composite product

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Embodiment 1

[0045] An integrated surface treatment method for titanium metal and plastic designed in the present invention, which mainly includes the following process flow: degreasing------water washing------acid corrosion------water washing--- --Ash removal------Washing------Activation------Washing------Electrolytic oxidation------Washing------The first soaking Washing --- water washing --- the second immersion --- water washing --- drying, degreasing, acid corrosion, ash removal and activation are pretreatment processes, the first The first rinsing, the second rinsing and drying are post-processing procedures, and the operation process of each process step is described in detail below.

[0046] (1) Pre-processing:

[0047] 1. Degreasing to remove oil stains on the surface of titanium workpieces. Since the surface of titanium metal is easy to form an extremely thin and dense oxide film, it has extremely high stability in the air and in acid, alkali and salt solutions, so it is basical...

Embodiment 2

[0070] See Figure 4 , a composite product produced by an integrated surface treatment method of titanium metal and plastic designed in the present invention, which includes: a titanium alloy test piece 1 and a plastic layer 2 integrally formed on the surface of the test piece.

[0071] The preparation process of composite products:

[0072] (2) Process the industrial titanium alloy plate into a test piece with a length of 50mm, a width of 15mm, and a thickness of 1mm. The processing method can be any one of forging, stamping, wire cutting, and CNC;

[0073] (1) Preparation of the microporous bonding layer on the surface of the test piece, the test piece is fixed with a titanium wire or a special titanium hanger, and after the pretreatment, electrolytic oxidation and posttreatment procedures included in Example 1 of the present invention, the test A microporous bonding layer is formed on the surface of the sheet;

[0074] (2) Titanium-plastic integrated injection molding, pu...

Embodiment 3

[0080] A composite product manufactured by the integrated surface treatment method of titanium metal and plastic designed in the present invention comprises: a titanium alloy mobile phone middle frame 3 and a plastic part 4 integrally formed on the mobile phone middle frame.

[0081] The preparation process of composite products:

[0082] (2) Forging, stamping or CNC processing of industrial titanium alloy plates, and then grinding, trimming and cleaning to obtain semi-finished blanks for the middle frame of mobile phones;

[0083] (1) Preparation of the microporous bonding layer on the surface of the middle frame of a titanium alloy mobile phone. The middle frame of the mobile phone is fixed with a special titanium hanger. A microporous bonding layer is formed on the surface of the middle frame of the mobile phone;

[0084](2) Titanium-plastic integrated injection molding, put the processed mobile phone middle frame into the customized mold in the injection molding machine, ...

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Abstract

A titanium and plastic integrated surface treatment method comprises the following steps that degreasing is conducted; acid corrosion is conducted; dust removal is conducted; activation is conducted,an oxidation film layer generated on the surface of a titanium workpiece during pretreatment is removed, meanwhile, secondary oxidation is delayed, and the binding force between a binding layer and atitanium substrate prepared during post-treatment is ensured; the titanium workpiece serves as an anode to be put into an electrolysis working solution which comprises phosphoric acid and electrolyticadjusting liquid, and through electrolysis, the binding layer which is well combined with the substrate and has a micropore structure with the diameter being 30-60 nm can be obtained on the surface of the titanium workpiece; primary immersion cleaning is conducted; secondary immersion cleaning is conducted, and a layer of adsorption filling film is formed in each micropore of the binding layer; and drying is conducted. According to the titanium and plastic integrated surface treatment method, the defects that titanium is high in surface activity and prone to oxidation during pretreatment areovercome, the ideal multi-pore binding layer is formed on the surface of the titanium through special electrolytic oxidation and post-treatment, the binding strength of the binding layer and the titanium substrate is ensured, and in addition, the integrated requirements of the heat flow plastic and the binding layer during injection molding are met.

Description

technical field [0001] The invention belongs to the surface treatment process of titanium metal, and relates to an innovative surface treatment method in which titanium and titanium alloy materials are integrated with plastic to finally form a titanium-plastic composite product. The method realizes a tight and firm combination between titanium metal and plastic. Background technique [0002] The application of metal and plastic integration technology on aluminum, copper, iron, stainless steel and other metal materials is relatively mature, and is widely used in parts of automobiles, household appliances, and electronic products. Titanium metal has become the preferred material for high-end products due to its high specific strength, high corrosion resistance and light weight. However, there is currently no mature treatment process for titanium and titanium alloy materials that can achieve integrated integration with plastics. Therefore, its industrial application is greatly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26B29C45/14B29C45/17
CPCB29C45/1418C25D11/26
Inventor 严风光周元柱
Owner 深圳市睿昌盛精密科技有限公司
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