Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for nano-injection molding of high-binding force aluminum or aluminum alloy surface

A nano-injection molding, aluminum alloy surface technology, applied in the direction of coating, can solve the problems of good adhesiveness, uneven resin, instability, etc., to achieve the effect of simple process

Active Publication Date: 2019-08-27
广西瑞祺丰新材料有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the acid treatment and fatty acid weak acid treatment steps are the most critical two steps, and the main purpose of the acid treatment is: (a) remove excess lye on the metal surface, (b) form a large number of corrosion holes on the metal surface, the corrosion The formation of pores is mainly due to the corrosion reaction between acid and metal. The formation of pores depends entirely on the composition phase and impurity phase of the metal substrate. Because the composition phase and impurities on the metal surface have different corrosion rates relative to acid, it directly leads to the corrosion of the metal surface. The distribution of corrosion holes is messy and disordered, the depth of the holes is different, and the state is completely disordered; therefore, the resin on the metal surface will be uneven and unstable during the nano-injection molding process, and the large and deep holes will have good adhesion and small holes And the shallow part has poor adhesion, which eventually leads to obvious defects in its mechanical properties, fatigue resistance, impact toughness, heat resistance and molding performance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for nano-injection molding of high-binding force aluminum or aluminum alloy surface
  • A method for nano-injection molding of high-binding force aluminum or aluminum alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for nano-injection molding on the surface of a high-bonding aluminum alloy, comprising the following steps in sequence:

[0029] (1) Pretreatment: Pretreatment is to remove the nano-scale natural oxide layer on the surface of aluminum or aluminum alloy by one of the treatment methods of polishing, polishing, tumbling, sandblasting or shot blasting. Here, the polishing process is selected;

[0030] (2) Pre-corrosion: soak the treated metal in 5wt.%H 2 SO 4 and 1wt%H 3 PO 4 Composition of mixed acid, soaking temperature 30 o C, for 5 minutes, chemically etched corrosion holes, then washed with pure water, and dried with cold air;

[0031] (3) DC galvanic corrosion: The pre-corroded metal is used as the anode, and the graphite is used as the cathode. At the same time, it is immersed in a mixed corrosion solution and connected to a DC power supply. The mixed corrosion solution includes 1wt.% hydrochloric acid, 0.5wt.% sulfuric acid, 0.2 wt.% .% oxalic acid and...

Embodiment 2

[0036] A method for nano-injection molding on the surface of a high-bonding aluminum alloy, comprising the following steps in sequence:

[0037] (1) Pretreatment: Pretreatment is to remove the nanoscale natural oxide layer on the surface of aluminum or aluminum alloy by one of polishing, polishing, tumbling, sandblasting or shot blasting. Here, the polishing process is selected;

[0038] (2) Pre-corrosion: soak the treated metal in 7wt.%H 2 SO 4 and 5wt%H 3 PO 4 Composition of mixed acid solution, soaking temperature 40 o C, for 7 minutes, chemically etched out corrosion holes, then washed with pure water, and dried with cold air;

[0039] (3) DC galvanic corrosion: The pre-corroded metal is used as the anode, and the graphite is used as the cathode. At the same time, it is immersed in a mixed corrosion solution and connected to a DC power supply. The mixed corrosion solution includes 2wt.% hydrochloric acid, 0.75wt.% sulfuric acid, 0.5wt% .% oxalic acid and 0.12wt.% AlCl...

Embodiment 3

[0044] A method for nano-injection molding on the surface of a high-bonding aluminum alloy, comprising the following steps in sequence:

[0045] (1) Pretreatment: Pretreatment is to remove the nano-scale natural oxide layer on the surface of aluminum or aluminum alloy by one of the treatment methods of polishing, polishing, tumbling, sandblasting or shot blasting. Here, the polishing process is selected;

[0046] (2) Pre-corrosion: soak the pretreated metal in 10wt.%H 2 SO 4 and 5wt%H 3 PO 4 Composition of mixed acid solution, soaking temperature 40 o C, for 10 minutes, chemically etched corrosion holes, then washed with pure water, and dried with cold air;

[0047] (3) DC galvanic corrosion: The pre-corroded metal is used as the anode, and the graphite is used as the cathode. At the same time, it is immersed in a mixed corrosion solution and connected to a DC power supply. The mixed corrosion solution includes 3wt.% hydrochloric acid, 1wt.% sulfuric acid, 1wt.% Oxalic ac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for nanometer injection molding on a surface of high-binding-force aluminum or aluminum alloy. The method comprises the following steps for treating the aluminum or thealuminum alloy: pre-treating; pre-etching; performing direct-current powered-on etching; performing secondary direct-current powered-on etching; treating after soaking in weak acid; and performing nanometer injection molding. The method for nanometer injection molding on the surface of the high-binding-force aluminum or the aluminum alloy is applicable to manufacturing of a mobile communication terminal shell.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a method for nano-injection molding on the surface of high-binding aluminum or aluminum alloy. Background technique [0002] Japan's Taiseiplas Co., Ltd. invented nano-molding technology (NMT) in 2002. This technology is a nano-molding technology that integrates metal and plastic. It can integrate metal and resin and is widely used in thin, light and portable products. On the casing of mobile electronic products, such as computer terminals and mobile phones. [0003] In the prior art, the NMT treatment process includes the following process: the metals to be bonded are subjected to alkali treatment, acid treatment, weak acid treatment with ester amino acid, rinsed with water, dried, and then injected. After the metal surface is treated, countless micropores with a diameter of about 20nm will be formed on the metal surface. In the concave-convex structure, an anchoring eff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14C23F1/20C25F3/04
Inventor 白林森梁莲芝
Owner 广西瑞祺丰新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com