Manufacturing method for metal and plastic composite bodies

Patent metadata

Field	Value
Publication number	US-2016221235-A1
Application number	US-201514942762-A
Country	US
Kind code	A1
Filing date	Nov 16, 2015
Priority date	Jan 30, 2015
Publication date	Aug 4, 2016
Grant date	—

Abstract

A manufacturing method of metal and plastic composite bodies integrated by etching a surface of a metal member and forming a thermoplastic resin on an etching surface may include forming a printing layer which prints a pattern or a character on an exposed surface of a metal member and a protective layer for protecting the printed pattern thereon, grease-removing and cleaning to remove a passivation oxidized film at a rear side of the metal member to be integrally coupled with a plastic portion, surface-treating a surface by using and etching a ferric chloride solution in a range of pH 3 to 4.5 so as to form a minute unevenness at the rear side, removing a smut generated in the surface-treating process, and molding for integrally forming the plastic portion with the metal member.

First claim

What is claimed is:

1 . A manufacturing method of metal and plastic composite bodies integrated by etching a surface of a metal member and forming a thermoplastic resin on an etching surface, the manufacturing method comprising:
forming a printing layer which prints a pattern or a character on an exposed surface of a metal member and a protective layer for protecting the printed pattern thereon; grease-removing and cleaning to remove a passivation oxidized film at a rear side of the metal member to be integrally coupled with a plastic portion; surface-treating a surface by using and etching a ferric chloride solution in a range of pH 3 to 4.5 so as to form a minute unevenness at the rear side; removing a smut generated in the surface-treating process; and molding, for integrally forming the plastic portion with the metal member.

2 . The manufacturing method of claim 1 , wherein in the forming the printing layer, the protective layer is formed by printing a pattern on the exposed surface of the metal member and coating the pattern with a coating matter in order to prevent the pattern printed on an upper surface from spreading and protect from the damage to the pattern.

3 . The manufacturing method of claim 1 , wherein in the molding for integrally forming the plastic portion with the metal member, a mold is maintained at 100±20° C.

4 . The manufacturing method of claim 3 , wherein the resin injected in the molding for integrally forming the plastic portion with the metal member is maintained at a melting temperature or more in a molten state to be deeply penetrated into an unevenness of the metal member formed by the surface-treatment.

5 . The manufacturing method of claim 3 , wherein in order to increase a coupling area and a coupling force of the plastic material and the metal member, minute slots, scratches, or grooves are formed on the surface of the metal member in advance before the grease-removing and cleaning, and in the surface-treating, more minute grooves are more deeply formed on the surface of the metal member by performing etching on the surface.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Hankook Nat Co Ltd

Inventors

• Yu Byung Seob
• Lee Yang Gi
• Choi Chan Mook
• Kim Hyung Chul

Classifications

• B29C2045/14868

  Pretreatment of the insert, e.g. etching, cleaning · CPC title

• C23F1/20

  for etching aluminium or alloys thereof · CPC title

• B29K2705/02

  Aluminium · CPC title

• B29C45/14311 Primary

  using means for bonding the coating to the articles (B29C45/14795 takes precedence) · CPC title

• C23C28/00

  Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D · CPC title