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In-mold labeling process

An in-mold insert injection molding and process technology, which is applied in the field of IML, can solve the problems of complicated printing process, high product defect rate, distortion and deformation, etc., and achieve the same excellent molecular diffusion bonding, simplified printing process, and strong bonding force Effect

Inactive Publication Date: 2012-10-03
GUANGDONG JANUS SMART GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, there are still the following disadvantages: 1) The initial cycle is long, especially the printing process is complicated; 2) The film is easy to fall off, twisted and deformed; 3) The defective rate of the product is high

Method used

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Embodiment Construction

[0019] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings.

[0020] An injection molding process for in-mold inserts, the steps of which are as follows:

[0021] Step 1, cutting the roll-shaped film FILM into a square block with a designed size for printing and forming processes, and performing pretreatment including baking and dust removal on the cut plastic film;

[0022] Step 2: Screen printing is performed on the surface of the film to form an image or text LOGO. The mesh size of the screen printing screen is 100-150 mesh, and then the screen-printed film is placed in an oven for ink curing. The purpose is to fix the IML ink , the oven temperature is set to 80-100°C, and the heating time is 1-2 hours;

[0023] Step 3: Perform 2D or 3D hot pressing and die-cutting on the film. After heating the printed film, fix the film in the 2D or 3D forming mold and pr...

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Abstract

An in-mold labeling process comprises the following steps of: performing pre-treatment including roasting and dust removal on a plastic thin film which is cut previously; performing screen printing on the surface of the thin film to form an image or character LOGO, and then putting the thin film in an oven to solidify ink, wherein the temperature of the oven is set in a range of 80 to 100 DEG C, and the heating time is 1-2 hours; performing 2D (2-Dimensional) or 3D (3-Dimensional) hot pressing or die cutting molding on the thin film; and fixing the thin film in the concave die of an injection molding die for injection molding, wherein an injection molding material is directly bonded to the surface of the thin film so that the screen-printed LOGO is embedded between the thin film and the injection molding material; and the injection molding material and the plastic thin film are the same material. The in-mold labeling process realizes direct bonding of the FILM to the injection molding material through injection molding in the die, so that the printing process procedure is simplified, and labour power, working hours and ink raw material are saved. Besides, the bonding force of the FILM to the injection molded layer is enhanced while the same product appearance effect is achieved.

Description

technical field [0001] The invention relates to the field of IML, in particular to an injection molding process for in-mold inserts. Background technique [0002] The Chinese name of IML is In-Mold Insert Injection Molding. Its process is very remarkable: the surface is a layer of hardened transparent film, the middle is a printed pattern layer, and the back is a plastic layer. Because the ink is sandwiched in the middle, the product can prevent surface It is scratch-resistant and rub-resistant, and can keep the color bright and not easy to fade for a long time. At present, in the traditional IML process, in order to realize the combination of FILM (film) and injection plastic, it is necessary to print chemical components such as effect color ink and IML special adhesive solvent on FILM, and combine FILM and injection plastic under high temperature and high pressure in the mold. Realize the chemical combination of product structure and the realization of appearance effect. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29B11/00
Inventor 彭宜学谢心亮王秉亚杨如伟
Owner GUANGDONG JANUS SMART GRP CO LTD
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