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Method for combining metal with resin

A metal and resin technology, applied in the field of metal and resin compounding, can solve the problems of low yield rate, weak bonding strength, limited application scope, etc., to improve production efficiency, reduce defect rate, and improve flexibility.

Inactive Publication Date: 2018-09-07
广州凯腾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned processing method for enhancing firmness, due to the design and manufacture of complex structures such as buckles and bolts on the metal insert, the metal processing cycle becomes longer and the production cost increases, and the complex structure is difficult to apply to small-sized metal parts, the application range is limited
In addition, only adhesives, or metals with complex structures such as buckles and bolts are used as inserts. During the injection molding process, it is very easy for the plastic to be undermolded or overflow in the metal structure, and the yield rate is not high.
[0004] At present, there are many kinds of relatively mature nano-injection molding treatments on the market, but basically they are all effective and must be injected within a certain time after nano-treatment. The main reason is that the generated nano-pores are pores in the oxide film layer. Or the holes generated by the chemical reaction on the oxide film layer will slowly close in the air, so it will fail after a long time, so that the metal and plastic cannot be combined or the combination will become weaker.
Due to the existence of the oxide film, the combination between the metal and the plastic is directly connected to the oxide film. Subsequent mechanical processing after injection molding and surface anodization of the aluminum alloy will destroy the oxide film generated during nano-treatment, making the bonding strength very strong. Weakness, part of the structure cracks and gaps are generated during anodic oxidation, and acid is hidden during anodic oxidation, which causes acid spit out of aluminum alloy products and is not good

Method used

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  • Method for combining metal with resin
  • Method for combining metal with resin
  • Method for combining metal with resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The concrete steps of this embodiment are:

[0045] – Pretreatment: After degreasing, alkali etching, neutralization, and two water washings on the metal sample, the dirt and natural oxide layer can be clearly shown.

[0046] – Coarse hole treatment, the treatment agent is sodium hydroxide 10-30g / L, sodium nitrate 20-60g / L, sodium chloride 2-10g / L, benzotriazole 1-10g / L, the temperature of the mixed solution is 55- 60°C, ultrasonic power 2.0W, time 50-200S.

[0047] – Microporous treatment, the treatment agent is phosphate 50-150g / L, lactic acid 10-30g / L, acetic acid 5-15g / L, benzotriazole concentration 1-10g / l, temperature 10-20℃, voltage 5 -10V, time 5-20min.

[0048] – Deep hole treatment, the treatment agent is ferric chloride 20-50g / L, oxalic acid 10-30g / L, temperature 40-45℃, time 30-60, pure water washing 2-3 times.

[0049] – Bake and cool

[0050] – Injection molding after cooling for 1 hour, the mold temperature is above 140°C.

[0051] In this embodiment...

Embodiment 2

[0053] This embodiment is roughly the same as the first embodiment, the difference is that after baking and dehydration, it is packaged for 1 hour and then placed for six months before injection molding. The specific steps are:

[0054] – Pretreatment: After degreasing, alkali etching, neutralization, and two water washings on the metal sample, the dirt and natural oxide layer can be clearly shown.

[0055] – Coarse hole treatment, the treatment agent is sodium hydroxide 10-30g / L, sodium nitrate 20-60g / L, sodium chloride 2-10g / L, benzotriazole 1-10g / L, the temperature of the mixed solution is 55- 60°C, ultrasonic power 2.0W, time 50-200S.

[0056] – Microporous treatment, the treatment agent is phosphate 50-150g / L, lactic acid 10-30g / L, acetic acid 5-15g / L, benzotriazole concentration 1-10g / l, temperature 10-20℃, voltage 5 -10V, time 5-20min.

[0057] – Deep hole treatment, the treatment agent is ferric chloride 20-50g / L, oxalic acid 10-30g / L, temperature 40-45℃, time 30-60,...

Embodiment 3

[0062] This embodiment is roughly the same as the previous embodiment, the difference is that injection molding is performed within 1 hour after baking and dehydration, followed by mechanical processing and surface treatment. The specific steps are:

[0063] – Pretreatment: After degreasing, alkali etching, neutralization, and two water washings on the metal sample, the dirt and natural oxide layer can be clearly shown.

[0064] – Coarse hole treatment, the treatment agent is sodium hydroxide 10-30g / L, sodium nitrate 20-60g / L, sodium chloride 2-10g / L, benzotriazole 1-10g / L, the temperature of the mixed solution is 55- 60°C, ultrasonic power 2.0W, time 50-200S.

[0065] – Microporous treatment, the treatment agent is phosphate 50-150g / L, lactic acid 10-30g / L, acetic acid 5-15g / L, benzotriazole concentration 1-10g / l, temperature 10-20℃, voltage 5 -10V, time 5-20min.

[0066] – Deep hole treatment, the treatment agent is ferric chloride 20-50g / L, oxalic acid 10-30g / L, temperatu...

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Abstract

The invention discloses a method for combining metal with resin. The metal is subjected to coarse hole processing to form a micropore of which the diameter range is 10-30nm and the depth is 0.2-2 micrometers, and then, the metal is subjected to deep hole processing to form a nanometer hole of which the aperture range is 40-100nm and the hole depth is 2-5 micrometers; after hole forming processing,an etching hole, the micropore and the nanometer hole coexist, and the combination of the metal and the resin is finished through injection on the formed nanometer hole. Injection molding is carriedout through the processed nanometer hole, so that the metal and the plastic cement are in direct hook face combination, and a clamping hook groove does not need to be additionally arranged on the metal for holding adhesive. The combination strength of the method is superior to strength necessary for subsequent machining, the flexibility of a production plan can be improved, a subsequent manufacture procedure reject ratio is reduced, production efficiency is greatly improved, and cost waste is lowered.

Description

technical field [0001] The invention belongs to the technical field of metal insert molding, and in particular relates to a method for compounding metal and resin. Background technique [0002] The technology of integrating metals and synthetic resins is required in a wide range of industrial fields such as automobiles, household electrical products, industrial equipment and other parts manufacturing, and a large number of adhesives have been developed for this purpose. For example, an adhesive that functions at room temperature or by heating is used for integrally joining metal and synthetic resin, and this method is currently a common joining technique. [0003] A more reasonable joining method that does not use an adhesive is also being studied. For magnesium, aluminum, light metals as their alloys, or ferroalloys such as stainless steel, the method of integrating high-strength engineering resins without using adhesives is one example. In order to make the combination of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14
Inventor 程绮
Owner 广州凯腾新材料科技有限公司
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