Method and apparatus for decorative molding

Patent metadata

Field	Value
Publication number	US-11007696-B2
Application number	US-201916255652-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	Feb 1, 2018
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A method for decorative molding capable of reducing a preparation time at the time of replacing a mold and expecting improvement in positioning accuracy of a decorative pattern in a molded article includes supplying a film on which a decorative pattern is formed between a first mold and a second mold in a mold open state of a mold, imaging a mold-side alignment mark recorded in the mold and a film-side alignment mark recorded in the film by a camera, positioning the film with respect to the mold by moving the film so that the film-side alignment mark comes close to the mold-side alignment mark, injecting resin into the mold in a mold closed state in which the film is sandwiched between the first mold and the second mold and cooling the resin to form a molded article and opening the mold and taking out the molded article in which the decorative pattern of the film is transferred to the surface.

First claim

What is claimed is:

1. A method for molding comprising:
supplying a film on which a pattern is formed between a first mold and a second mold of a mold in a mold open state;
arranging a mold-side alignment mark colored with a transparent color on a transparent plate in the mold;
irradiating the mold-side alignment mark and a film-side alignment mark recorded in the film with parallel light from a side of the mold and imaging the marks by a camera;
positioning the film with respect to the mold by moving the film so that the film-side alignment mark comes close to the mold-side alignment mark, injecting resin into the mold in a mold closed state in which the film is sandwiched between the first mold and the second mold and cooling the resin to form a molded article; and
opening the mold and taking out the molded article in which the pattern of the film is transferred to a surface of the molded article.

2. The method for molding according to claim 1 ,
wherein the mold-side alignment mark and the film-side alignment mark have colors different from each other.

3. The method for molding according to claim 2 ,
wherein the film-side alignment mark has a transparent color.

4. The method for molding according to claim 1 ,
wherein the film-side alignment mark is formed to be transparent or formed with a transparent color and the mold-side alignment mark and the film-side alignment mark are detected by the camera to perform positioning.

5. The method for molding according to claim 1 ,
wherein the film-side alignment mark is a transparent light-transmission film, and
light diffused at edge parts of the light transmission film is detected by the camera to perform positioning.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Hiraishi Masakazu
• Morimoto Takashi

Classifications

• B29C45/80 Primary

  of relative position of mould parts · CPC title

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B29C2945/76464

  cameras · CPC title

• B44C1/16

  for applying transfer pictures or the like · CPC title

• B29C2945/76772

  Inserts · CPC title