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Combination method of alloy and plastic

An alloy and plastic technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of stress concentration, rising production costs, low bonding strength, etc., to save safety maintenance, recycling, and production costs. The effect of drop, good bond strength

Inactive Publication Date: 2012-03-14
CATCHER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Bonding with chemical adhesives: This bonding method is the easiest, but common chemical bonding methods have concerns about low bonding strength and low temperature resistance, so this method is not suitable for bonding with high-strength requirements or those with high-temperature conditions. Components using requirements in context
[0004] 2. Mechanical connection: for example, it can be injection over molding, blind rivet joint or weld seam. However, components combined in this way often produce stress concentration at the joint , resulting in easy damage to the junction during use
[0005] 3. Surface treatment of the alloy before joining the plastic: This method, for example, soaks the alloy in ammonia (NH 3 ), hydrazine (N 2 h 4 ) or an aqueous solution of amine compounds to make the surface exhibit plastic-friendly properties, and then make the plastic melt contact the surface of the alloy by means of injection molding, etc., and the purpose of bonding will be achieved after the plastic is cooled. However, the surface treatment method of this method Most of the chemicals used have irritating odor or toxicity, which is not only dangerous, but also the storage of the chemicals, anti-virus measures during use, and recycling after use will all lead to increased production costs

Method used

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  • Combination method of alloy and plastic
  • Combination method of alloy and plastic
  • Combination method of alloy and plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: The alloy type is AA5052 aluminum alloy, immersed in a mixed aqueous solution of 0.15wt% of organic salts, 1.4wt% of inorganic salts and 0.35wt% of nonionic surfactant for 60 seconds to degrease. Soak in the mixed aqueous solution of 250g / L and sodium gluconate 10g / L for 10 seconds for alkali washing, soak for 30 seconds in the mixed solution of phosphoric acid 98% and glycine 2% for chemical polishing, and soak in nitric acid aqueous solution for 30 seconds Pickling, followed by sulfuric acid 175g / L aqueous solution as electrolyte at 0.6A / dm 2 The current density was treated for 70 minutes. After the treatment, the surface of the aluminum alloy was combined with polyphenylene sulfide (PPS) by injection molding, and 50wt% of glass fibers were added to the polyphenylene sulfide (PPS). The strength measured by tensile test and lateral tensile test is 14.4 and 3.3Kgf / cm respectively 2 .

Embodiment 2

[0053] Embodiment 2: The alloy type is AA5052 aluminum alloy, immersed in a mixed aqueous solution of 0.15wt% of organic salts, 1.4wt% of inorganic salts and 0.35wt% of nonionic surfactant for 60 seconds to degrease. Soak in the mixed aqueous solution of 250g / L and sodium gluconate 10g / L for 10 seconds for alkaline cleaning, soak in the mixed solution of 98% phosphoric acid and 2% glycine for 30 seconds for chemical polishing, and soak in aqueous solution of nitric acid for 30 seconds Pickling, followed by sulfuric acid 175g / L aqueous solution as electrolyte at 0.6A / dm 2 The current density was treated for 70 minutes. After the treatment, the surface of the aluminum alloy was combined with polypropylene (PP) by injection molding, and 30wt% glass fibers were added to the polypropylene (PP). This embodiment was tested in the forward tensile test and The strength measured by the lateral tensile test is 30.8 and 6.2Kg / cm respectively 2 .

Embodiment 3

[0054] Embodiment 3: The alloy type is AA6061 aluminum alloy, immersed in a mixed aqueous solution of 0.15wt% of organic salts, 1.4wt% of inorganic salts and 0.35wt% of nonionic surfactant for 60 seconds to degrease. Soak in the mixed aqueous solution of 250g / L and sodium gluconate 10g / L for 10 seconds for alkali washing, soak for 30 seconds in the mixed solution of phosphoric acid 98% and glycine 2% for chemical polishing, and soak in nitric acid aqueous solution for 30 seconds Pickling, followed by sulfuric acid 175g / L aqueous solution as electrolyte at 0.8A / dm 2 The current density was treated for 53 minutes. After the treatment, the surface of the aluminum alloy was combined with polypropylene (PP) by injection molding, and 30wt% glass fibers were added to the polypropylene (PP). This embodiment was tested in the forward tensile test and The strength measured by the lateral tensile test is 50.7 and 5.2Kgf / cm respectively 2 .

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Abstract

The invention relates to a combination method of alloy and plastic. According to the invention, first, alloy is subject to an electrochemical treatment, such that micropores are formed on the surface of the alloy; and plastic is formed on the surface of the alloy through an injection molding method. Because molten plastic can enter the micropores, when the plastic is cooled and cured, the plastic can be attached to the surface of the alloy.

Description

technical field [0001] The invention relates to a method for combining alloys and plastics. Background technique [0002] Composite materials composed of alloys and plastics, for example, have application requirements in the automotive industry, electronic products, and industrial equipment. In the prior art, there are mainly three methods for combining alloys and plastics: [0003] 1. Bonding with chemical adhesives: This bonding method is the easiest, but common chemical bonding methods have concerns about low bonding strength and low temperature resistance, so this method is not suitable for bonding with high-strength requirements or those with high-temperature conditions. Components that use the requirements in the environment. [0004] 2. Mechanical connection: for example, it can be injection over molding, blind rivet joint or weld seam. However, components combined in this way often produce stress concentration at the joint , resulting in easy damage to the junction...

Claims

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Application Information

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IPC IPC(8): C25F3/06C25D11/10C25D11/26C25D3/22B29C65/70
Inventor 张正武谭家彦胡少刚
Owner CATCHER TECH
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