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Magnetic forming method of plastic

A molding method and magnetic technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high cost and high process requirements, and achieve the effect of maintaining the original performance, reducing cost and processing difficulty

Active Publication Date: 2013-12-04
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of multi-component injection technology is that it needs a special injection machine and injection mold, the cost is high, the process requirements are high, and it is suitable for small products

Method used

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  • Magnetic forming method of plastic
  • Magnetic forming method of plastic
  • Magnetic forming method of plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Formula: 40 parts of PP resin, 20 parts of magnetic powder, 30 parts of graphite, 0.5 part of antioxidant 1010, 0.5 part of polyol wax;

[0020] Preparation method: Mix PP resin, magnetic powder, graphite, antioxidant 1010 and polyol wax uniformly through a high-speed mixer, melt, blend, extrude, tie, water-cool, pelletize, and dry to obtain wear-resistant 1. Antistatic magnetic functional material, as shown in Figure 1, the matrix plastic PP and magnetic functional material are mixed in proportion, then plasticized by an injection molding machine or an extruder, and then injected into the cavity of a mold 1 with a heating function, and at the same time, it is filled with The magnetizer and the magnetizing fixtures 3 arranged on both sides of the mold magnetize the melt in the mold cavity, so that the magnetic functional material 2 in a semi-molten state in the melt acquires magnetism, and tends to flow out of the product under the action of magnetic force. The surface ...

Embodiment 2

[0022] Formula: 50 parts of PP resin, 20 parts of magnetic powder, 29 parts of graphite, 0.5 part of antioxidant 1010, 0.5 part of polyol wax

[0023] Preparation method: the same as the preparation method described in Example 1.

Embodiment 3

[0025] Formula: 70 parts of PE resin, 30 parts of magnetic powder, 10 parts of graphite, 0.1 part of antioxidant 1010, 2 parts of polyol wax

[0026] Preparation method: the same as the preparation method described in Example 1.

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Abstract

The invention discloses a magnetic forming method of plastic. The method comprises preparation of magnetic functional material, plasticizing injection, magnetizing traction, and a pressure-maintaining cooling and curing process, wherein the magnetic functional material serving as a master batch is mixed with other base resins (plastic) according to a set proportion; then the mixture is plasticized by an injection moulding machine and injected into a mould cavity with a heating function; meanwhile, a magnetizer magnetizes the melt in the mould cavity so that the semi-molten magnetic functional material in the melt obtains magnetism and moves towards the product surface and most of the magnetic material is enriched on the product surface; and demoulding is performed by pressure-maintaining cooling and curing to obtain the product. The method does not have special requirement on an injection machine, an extrusion machine and a mould; the raw material resin can be replaced at will; the same effect of a conventional injection moulding product can be realized in the case of relatively small addition amount of a functional assistant; meanwhile, the cost and processing difficulty are reduced, and the original performance of the resin body is kept relatively well; and the method is suitable for various products.

Description

technical field [0001] The invention relates to a plastic molding technology, in particular to a plastic magnetic molding method. Background technique [0002] Due to factors such as strength, stability, processability, functionality, and cost, chemically synthesized resins are generally not directly used in the production of plastic products, but are modified to improve the performance of plastic materials or obtain certain specific properties. Features. Products made by conventional injection molding technology have functional additives evenly dispersed in the product, and in order to achieve certain functions (such as flame retardancy, antistatic, electrical conductivity, wear resistance, weather resistance, heat conduction, luminescence, corrosion resistance, etc.), Corresponding functional additives have to be added to the matrix resin in large quantities, but in fact only the additives in the surface layer play a practical role, resulting in waste of additives in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29C45/17B29C47/00B29C47/08C08L23/12C08L55/02C08L23/06C08L77/00C08K13/02C08K3/22H01F1/00H01F13/00
Inventor 刘小林刘罡李天明陈健李宝鹏叶淑英肖利群
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD