A method for integrally forming a thermoplastic composite structure on a resin plastic part

A thermoplastic and thermoplastic resin technology, applied in the direction of coating, etc., can solve the problems of limited application range, harsh combination conditions, low production efficiency, etc., achieve high design freedom characteristics, shorten the forming cycle and improve production efficiency.

Active Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molding objects of this invention are: fiber-reinforced thermosetting epoxy resin composite material as the main body insert, polyamide and glass fiber copolymer or polyurethane and glass fiber copolymer plastic, but the thermosetting resin is cross-linked and solidified with other plastics. The combination conditions of engineering plastics are harsh, and the scope of use is limited; and the preparation process requires two independent steps of hot pressing forming and in-mold injection molding, which lead to a long forming cycle and low production efficiency

Method used

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  • A method for integrally forming a thermoplastic composite structure on a resin plastic part
  • A method for integrally forming a thermoplastic composite structure on a resin plastic part
  • A method for integrally forming a thermoplastic composite structure on a resin plastic part

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The woven carbon fiber reinforced polypropylene composite material insert (dimensions: length 140mm*width 140mm*height 2mm) that has been cut, cleaned, and dried is placed in the infrared heating furnace 1 by rotating the manipulator, and the insert is heated to heat up to within 10 minutes. 135°C and heat preservation at this temperature for 8 minutes; after the heat preservation is completed, put the composite material insert into the slot of the forming mold by rotating the manipulator 2. The leading part of the injection molding machine pushes the mold partly closed, and the spring blank holder 10 is in contact with the insert and exerts pressure on it. At this time, the polypropylene melt is injected into the cavity; then the mold is pushed to be completely closed and the resin pressure (holding pressure) is maintained. : 3Mpa, holding time: 25s), after the product is cooled, the product is ejected by the ejection mechanism of the injection molding machine, and take...

Embodiment 2

[0039] Place the cut, cleaned and dried braided carbon fiber reinforced polyetheretherketone composite material insert (dimensions: length 140mm*width 140mm*height 3mm) in the infrared heating furnace 1 by rotating the manipulator, and heat the insert to make it within 25min The temperature was raised to 300°C and kept at this temperature for 8 minutes; after the heat preservation was completed, the composite material insert was put into the slot of the forming mold by rotating the manipulator 2 and fixed. The leading part of the injection molding machine pushes the mold partly closed, and the spring blank holder 10 is in contact with the insert and exerts pressure on it. At this time, the short carbon fiber filled polyether ether ketone mixed melt is injected into the cavity; then the mold is pushed to be completely closed and held Resin pressure (holding pressure: 60Mpa, holding time: 25s), after the product is cooled, the product is ejected by the demoulding mechanism of the...

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Abstract

The invention belongs to the field of composite material forming, and particularly relates to a thermoplasticity composite material and surface resin plastic part integrated forming method. The methodcomprises the following steps that a, a thermoplasticity composite material insert is selected; and b, after being preheated, the insert is arranged in a die to be subjected to hot pressing and injection molding integrated forming,wherein after the die is closed for the first time and a closed cavityin the assigned size is formed, resin melt is injected into the cavity through an injection molding machine, then, the die is compressed to be completely closed, the resin melt transmits pressure to the insert to form the insert, meanwhile, under the action of the melt temperature, the resin meltmelts on the surface of the insert, and the insert and the resin plastic part form surface bonding. The thermoplasticity composite material and surface resin plastic part integrated forming method combines the advantages of hot pressing forming and injection molding compression forming, and is suitable for producing high-strength, high-size-precision and complex-structure composite material products; and due to the die pressing and injection molding compression integration character, the production efficiency can be improved, and the production period is shortened.

Description

technical field [0001] The invention belongs to the field of composite material forming, and more specifically relates to an integrated forming method of thermoplastic composite material and surface resin plastic parts. Background technique [0002] Fiber-reinforced thermoplastic composites are a general term for composite materials obtained by reinforcing various thermoplastic polymers such as glass fibers, carbon fibers, and aramid fibers. There are various forms such as short fiber reinforcement, long fiber reinforcement, continuous fiber reinforcement and fabric reinforcement; fiber Reinforced thermoplastic composites are widely used in aerospace, automobile, construction and other fields due to their excellent comprehensive properties, and have broad development prospects. [0003] Thermoforming is currently an important process for producing fiber-reinforced thermoplastic composite parts. Its basic principle is to heat the pre-prepared thermoplastic composite sheet to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14B29C45/56B29C45/72
CPCB29C45/14B29C45/561B29C45/7207B29C2045/14868
Inventor 黄志高周华民邓天正雄张云王云明
Owner HUAZHONG UNIV OF SCI & TECH
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