Preparation method of plastic-metal part

A technology for plastic metal and parts, applied in the direction of coating, etc., can solve problems such as poor compatibility, difficulty in achieving consistent fluidity of materials, weld lines, flow marks, etc., to improve aesthetics, reduce waste, and simple process Effect

Inactive Publication Date: 2014-05-14
SHANGHAI LANGYI FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Metallic pigments and pearlescent pigments in plastic metals have poor compatibility with the matrix resin, and are subjected to shear force during processing, which makes it difficult to achieve the same fluidity as the matrix resin material, and is 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

[0017] The injection molding method for preparing the plastic metal switch panel, the specific steps are as follows:

[0018] (1) After mixing 100 parts of PP resin, 0.5 part of aluminum powder and 0.3 part of natural fish scale pearlescent pigment, plastic metal particles are obtained by twin-screw melt extrusion, which are used to prepare plastic metal switch door panels;

[0019] (2) An overflow well is set at the place where the melt flow converges in the injection mold of the switch panel;

[0020] (3) Carry out drying pretreatment in the oven of 80~100 ℃ with plastic metal particle;

[0021] (4) Add the pretreated plastic metal particles into the screw barrel of the injection molding machine and heat to melt;

[0022] (5) Plastic metal particles in the molten state are injected into the cavity of the mold until the molten plastic metal particles fill the cavity and reach the overflow well, wherein the injection temperature is 220 ° C, the injection pressure is 100 Bar, ...

Embodiment 2

[0026] An injection molding method for preparing a plastic metal automotive trim, the specific steps are as follows:

[0027] (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, which are used to prepare plastic and metal automotive trim parts;

[0028] (2) Set overflow wells at the melting point of the injection mold of the automotive trim;

[0029] (3) Carry out drying pretreatment in the oven of 80~100 ℃ with plastic metal particle;

[0030] (4) Add the pretreated plastic metal particles into the screw barrel of the injection molding machine and heat to melt;

[0031] (5) Plastic metal particles in the molten state are injected into the cavity of the mold until the molten plastic metal particles fill the cavity and reach the overflow well, wherein the injection temperature is 230 ° C, the injection pressure is 105 Bar, and the injecti...

Embodiment 3

[0035] An injection molding method for preparing a plastic-metal air-conditioning panel, the specific steps are as follows:

[0036] (1) After mixing 100 parts of PC resin, 0.2 part of aluminum powder and 0.8 part of natural fish scale pearlescent pigment, plastic metal particles are obtained by twin-screw melt extrusion, which are used to prepare plastic and metal air-conditioning panels;

[0037] (2) Set overflow wells at the melting point of the injection mold of the air-conditioning panel;

[0038] (3) Carry out drying pretreatment in the oven of 80~100 ℃ with plastic metal particle;

[0039] (4) Add the pretreated plastic metal particles into the screw barrel of the injection molding machine and heat to melt;

[0040] (5) Plastic metal particles in the molten state are injected into the cavity of the mold until the molten plastic metal particles fill the cavity and reach the overflow well, wherein the injection temperature is 250°C, the injection pressure is 110Bar, and ...

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PUM

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Abstract

The invention discloses a preparation method of a plastic-metal part. The preparation method particularly comprises the following steps: forming a cavity with the shape corresponding to the outline of the plastic-metal part in an injection mould, arranging a flash well on the collecting position of injection moulding fusant material flows, and pretreating plastic-metal granules; then adding the plastic-metal granules into a spiral cylinder of an injection moulding machine, and heating till the granules are melt; injecting the plastic-metal granules in a molten state into the cavity of the mould till the molten plastic-metal granules are fully injected into the cavity and reaches the flash well; cooling, opening the mould, and removing the end head of the flash well to obtain the plastic-metal part. The preparation method disclosed by the invention is simple, can solve the problem of welding lines of a final product without modifying a reagent in a formula, and can be used for preparing the plastic-metal parts, such as switch panels, automobile ornaments and air-conditioner panels; the beauty degree of a plastic-metal product is enhanced.

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. [0003] 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 fro...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B29C45/00B29C45/26B29C45/76
CPCB29C45/0025B29C45/0001B29C45/76B29C2045/0096B29C2945/76498B29C2945/76531B29C2945/76561B29C2945/76595
Inventor逯琪唐晓峰刁婧刘宾
OwnerSHANGHAI LANGYI FUNCTIONAL MATERIALS