Preparation method of plastic metal part

A technology for plastic and metal parts, which is applied in the field of plastic and metal parts preparation, can solve problems such as poor compatibility, difficulty in achieving consistent fluidity of materials, weld lines, flow marks, etc., so as to improve the problems of weld lines and improve the appearance The effect of high degree and simple process

Inactive Publication Date: 2019-06-21
绍兴美衡德金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Metallic pigments and pearlescent pigments in plastic metals have poor compatibility with the matrix resin, and are subjected to shear force during processing, making it difficult to achieve the same fluidity as the matrix resin material, and are prone to defects such as weld lines and flow marks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1 The injection molding method for preparing a plastic metal switch panel, the specific steps are as follows: (1) 100 parts of PP resin, 0.5 part of aluminum powder, and 0.3 part of natural fish scale pearlescent pigment are mixed to obtain plastic metal particles through twin-screw melt extrusion, and (2) Set overflow wells at the place where the melt flow converges in the injection mold of the switch panel; (3) Dry and pretreat the plastic and metal particles in an oven at 80-100°C; ( 4) Add the pretreated plastic metal particles into the screw barrel of the injection molding machine and heat to melt; (5) Inject the molten plastic metal particles into the cavity of the mold until the molten plastic metal particles fill the cavity And reach the overflow well, where the injection temperature is 220°C, the injection pressure is 100Bar, the injection speed is 45mm / s, and the injection time is 10s; (6) Open the mold after cooling, and take out the switch panel parts...

Embodiment 2

[0009] Example 2 The injection molding method for preparing plastic and metal car decorations, the specific steps are as follows: (1) After mixing 100 parts of ABS resin, 0.3 part of aluminum powder, and 0.5 part of natural fish scale pearlescent pigment, plastic metal particles are obtained by twin-screw melt extrusion, It is used to prepare plastic and metal automotive trims; (2) Set overflow wells at the melting point of the injection mold of automotive trims; (3) Pre-dry plastic and metal particles in an oven at 80-100°C (4) Add the pretreated plastic metal particles into the screw barrel of the injection molding machine and heat to melt; (5) Inject the molten plastic metal particles into the cavity of the mold until the molten plastic metal particles are filled There is a cavity and reaches the overflow well, where the injection temperature is 230°C, the injection pressure is 105Bar, the injection speed is 50mm / s, and the injection time is 15s; (6) Open the mold after cool...

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PUM

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Abstract

The invention relates to a preparation method of a plastic metal part. The method comprises the following steps that (1), a shaping cavity is formed in an injection mold corresponding to the appearance of the plastic metal part, and an overflow well is arranged at a collection position of material flow of an injection molding melt; (2) drying and pretreating plastic metal particles in an oven withtemperature of 80-100 DEG C; (3) adding the plastic metal particles pretreated in the step of (2) into a screw barrel of an injection molding machine, and heating until the plastic metal particles are molten; (4) injecting the plastic metal particles in the molten state in the step of (3) into a shaping cavity of a mold until the molten plastic metal particles are filled into the shaping cavity and reach the position of the overflow well; (5) opening the mold after cooling, and taking out the prepared part with an end of the overflow well; and (6) removing the end of the overflow well to obtain the plastic metal part. The method solves the welding line problem of a plastic metal by changing the process on the basis of not changing an original formula.

Description

technical field [0001] The invention relates to a method for preparing plastic and metal parts, in particular to an injection molding method for plastic and metal parts. Background technique [0002] Plastic-metal is a novel composite material. Through formula design, the final product combines the excellent appearance performance of metal with the design and processing performance of plastic, and has excellent and adjustable comprehensive performance. Plastic metal saves the intermediate link of the spraying process, but its final product has the same bright metal appearance as the sprayed product. It is a green and environmentally friendly product that will become the development trend of new materials in the future and will definitely replace sprayed products. The formula design of plastic metal contains metallic pigments or pearlescent pigments. Metallic pigments are one of the important pigments to achieve metallic effects. It has characteristics different from other p...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B29C45/78B29C45/77B29C45/76B29B9/06B29K23/00B29K55/02
Inventor李伟
Owner绍兴美衡德金属制品有限公司