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Multi-color multi-material injection molding method

A multi-material injection molding and molding method technology, applied in household components, applications, household appliances, etc., can solve the problems of large color differences between individual products, poor product consistency or stability, and difficulty in environmental protection and non-toxic thinners. To achieve the effect of reducing unstable factors, comfortable touch, and diversified visual gloss

Inactive Publication Date: 2019-09-10
湖南桑尼森迪玩具制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the paint is environmentally friendly and non-toxic, it is difficult for the thinner to be environmentally friendly and non-toxic
Although most of the diluent will volatilize, there will still be a certain amount of residue, which is a hidden danger to children's health
[0004] 2. Since the paint is attached to the surface of the molded product, it will peel off due to changes in the production process / environmental conditions
This is a risk to children's safety and the product pattern is not durable
[0005] 3. Since the coloring is produced individually by hand, it not only requires high technical level and proficiency of the operators, but also the production efficiency of this production method is low, the color difference between individual products is large, the quality is difficult to control, and the product consistency poor stability

Method used

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  • Multi-color multi-material injection molding method
  • Multi-color multi-material injection molding method
  • Multi-color multi-material injection molding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Use an injection molding machine to heat the off-white ABS to 170°C to 200°C, inject it into the mold cavity after plasticizing, and form ABS plastic parts after cooling and molding (such as figure 2 A) is the head, face and neck of a cartoon doll.

[0051] Then put the molded ABS plastic part into an overmolding mold cavity and fix the position so that it cannot move. Use an injection molding machine to heat the brown PVC to 150°C to 190°C, and inject it into the cavity of the overmolding mold after plasticization, so that the PVC melt can be coated on the upper part of the ABS plastic part (specifically, it can be determined by designing the overmolding mold The structure of the cavity is realized), and after cooling, ABS+PVC plastic parts are formed (such as figure 2 B). After the PVC melt cooled, it formed the brown hair of the cartoon doll.

[0052] Put the ABS+PVC plastic parts formed above into the cavity of a new overmolding mold, and fix it so that it cann...

Embodiment 2

[0054] Use an injection molding machine to heat the blue ABS to 170°C to 200°C, inject it into the mold cavity after plasticizing, and form an ABS plastic part after cooling and molding, which is the basic background color of a Beijing opera mask (such as image 3 shown).

[0055] Then put the molded ABS plastic part into an overmolding mold cavity and fix the position so that it cannot move. Heat the white PVC to 150°C to 190°C with an injection molding machine, inject it into the cavity of the overmolding mold after plasticizing, so that the PVC melt covers the partial surface of the ABS plastic part, and form an ABS+PVC plastic part after cooling. Among them, after the PVC melt is cooled, it forms the eye area of ​​Peking Opera facial makeup, a part of the Tai Chi pattern on the forehead, the white encapsulating parts of the ears, chin and other areas (such as image 3 shown).

[0056] Put the ABS+PVC plastic parts formed above into the cavity of a new overmolding mold, a...

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Abstract

The invention relates to a multi-color multi-material injection molding method. The method comprises the following steps of S1, selecting at least a first plastic material and a second plastic material as injection molding materials; S2, heating and plasticizing the first plastic material, injecting the first plastic material into a first mold cavity, and taking out the molded first plastic material to obtain a first injection molding body; S3, placing the first injection molding body into a second mold cavity and fixing the position of the first injection molding body; and S4, heating and plasticizing the second plastic material and then injecting the second plastic material into the second mold cavity, so that the melt of the second plastic material covers the local surface of the firstinjection molding body, and after cooling and curing molding are completed, taking out an obtained double-material composite injection molded part taking the first plastic material as a main body andthe second plastic material as a coating glue; and so on. According to the method, each time the injection molded part molded in the previous step is placed in a novel coating mold cavity for fixing,and the Nth plastic material is plasticized and injected into the mold cavity, so that a novel layer of coating glue is formed on the surface of the injection molded part molded in the previous step until products are completed. According to the method, the production process is simple; and the product is safer and healthier, is more stable in quality and higher in grade.

Description

technical field [0001] The invention relates to a molding process of plastic products, in particular to a multi-color and multi-material injection molding method for producing plastic products such as plastic toys. Background technique [0002] Most of the toys produced in the existing market use ABS or PVC as injection molding raw materials. After the raw materials are plasticized, they are injected into a mold cavity for injection molding, and an uncolored intermediate product is obtained in one piece. The intermediate product is colored separately according to different parts by printing and other methods to obtain a beautiful and colorful product; the internal space structure of the mold cavity used is consistent with the shape and size of the target product. For example, in the production and manufacturing process of plastic cartoon characters, the plastic is plasticized and injected into the mold to obtain hair, face, neck, clothes, etc., and then the hair is spray-dye...

Claims

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Application Information

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IPC IPC(8): B29C45/16B29L31/52B29K25/00B29K27/06B29K21/00
CPCB29C45/1615B29K2021/003B29K2025/08B29K2027/06B29L2031/5209
Inventor 杨杰
Owner 湖南桑尼森迪玩具制造有限公司
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