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Metal and plastic binding method

A plastic and metal technology, applied in the direction of coating, can solve the problems of instability, different characteristics, unable to obtain the same results, etc., to achieve the effect of increasing stability and improving bonding force

Pending Publication Date: 2018-07-27
广州凯腾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] -NMT treatment can effectively combine aluminum alloy with PPS rubber or PBT rubber, but the combination with nano-injection molding of magnesium alloy can only obtain a bonding force of 0-15Mpa, and it is unstable and cannot meet the current market demand
[0005] - Other metal and plastic combination schemes include magnesium alloys, but due to differences in metal composition and properties, it is generally impossible to obtain the same results when the same scheme is applied to different metals
[0006] In the existing methods of combining metals such as metal aluminum with plastics, nanopores are obtained by chemical corrosion schemes, but magnesium alloys are different from aluminum alloys, and their activity is greater than that of aluminum alloys. Destruction of the medium causes a decrease in the binding force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The metal sample used in this embodiment is an AZ91D magnesium alloy, and the specific steps are:

[0078] – Degreasing the metal sample, using a weak alkaline degreasing agent, the temperature is 40-65 degrees, in the specific experiment, choose 55 ° C, soak for 1 to 5 minutes, choose 3 minutes in the specific experiment;

[0079] –Put the product after degreasing and cleaning into pickling. The main components of the pickling solution include nitric acid, thiourea, etc., the concentration is 100g / L, pH 1-3, the time is 1 minute, the temperature is normal temperature, the surface of the product after pickling There will be a layer of black ash;

[0080] – Put the pickled and cleaned products into neutralization. Neutralization can remove impurities and surface black ash generated during the pickling process of magnesium alloys. Neutralization uses a neutralizer with a concentration of 100g / L, and the treatment time is 60 seconds. Normal temperature treatment;

[0081...

Embodiment 2

[0088] The test method and related parameters of this embodiment are the same as those of the first embodiment, except that the injection molding rubber is replaced by PPS, and the product is cooled for 4 hours after injection molding, and the pulling force test is carried out, and the obtained bonding force value is 30-40 MPa. It can be seen that the change of injection molding material can further improve the bonding force.

Embodiment 3

[0090] The test method and relevant parameters of this embodiment are the same as those of the first embodiment, except that the metal sample is replaced by AZ91D magnesium alloy to AZ31B magnesium alloy. After being injected with PBT and cooled for 4 hours, the pulling force test is carried out to obtain the binding force value. At 27-34MPa.

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Abstract

The invention provides a metal and plastic binding method. The metal and plastic binding method is characterized in that through chemical corrosion, a first layer of micropores which are 50-500 nanometers in depth and 10-100 nanometers in diameter is formed; electrochemical anodic oxidation reaction is carried out on the basis of the first layer of micropores, so that a second layer of microporesis formed and an overlapped micropore layer is obtained; and an electrolytic solution adopted in the electrochemical anodic oxidation reaction contains organic amine, so that the micropore layer contains an organic amine component when the micropore layer is formed. With the adoption of the metal and plastic binding method, the binding force of metal and plastics is improved, and the binding stability of the metal and the plastics is also improved.

Description

technical field [0001] The invention belongs to the technical field of metal insert molding, and in particular relates to a method for combining metal and plastic. Background technique [0002] In the field of handheld electronic equipment, the entire market is pursuing a large / thin / light appearance and feel, which puts forward higher requirements for the mechanical components of electronic equipment, especially for notebook mechanical components. The market is trying to reduce the thickness of the product , and can still obtain good structural strength, so magnesium alloy is a metal that is particularly favored by notebook components. Due to the increasing antenna receiving requirements of notebooks, it is necessary to have a plastic area on the metal shell to receive the antenna, so magnesium alloy Nano-injection molding with plastic has become a trend; [0003] At present, there are many kinds of relatively mature nano-injection molding treatments on the market, but they...

Claims

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Application Information

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IPC IPC(8): B29C45/14B29K705/00
Inventor 程绮
Owner 广州凯腾新材料科技有限公司
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