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Forming method for thermosetting polymer fiber composite workpiece

A fiber composite material and molding method technology, applied in the field of resin-based fiber-reinforced composite material molding, can solve the problems of air bubbles and dry spots, poor interface adhesion, poor fiber infiltration, etc., to prevent air bubbles or dry spots, rapid injection , The effect of uniform distribution of material and liquid

Pending Publication Date: 2020-09-22
长春三友智造科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a molding method for thermosetting polymer fiber composite parts, to overcome the fact that the existing reaction injection molding method is not suitable for large-scale, high-performance, thermosetting polymer continuous fiber-reinforced composite materials with curved surfaces, The production of parts is prone to the disadvantages of poor fiber infiltration, poor interface adhesion, air bubbles and dry spots

Method used

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  • Forming method for thermosetting polymer fiber composite workpiece
  • Forming method for thermosetting polymer fiber composite workpiece
  • Forming method for thermosetting polymer fiber composite workpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The molding die of the present invention is composed of a soft rubber upper die and a metal lower die (metal female die).

[0034] A. First, use ordinary carbon steel to make a set of molds for rubber soft mold manufacturing. The surface finish of the inner surface should reach 10 or more. The upper and lower molds of the mold are equipped with heat exchange devices and the temperature is controllable. The lower mold has heating medium channels. , The mold flanging width is more than 2mm, and a number of compression screw holes, injection ports and air extraction ports are set; an overflow groove with a width of about 1cm is set at a distance of about 1cm along the edge of the lower mold flanging plane. The tight screw hole is arranged outside the overflow groove, and cooperates with the pressure bar to seal the soft rubber mold.

[0035] B. Choose a heat-resistant and high-strength rubber sheet with a thickness of 10-20mm, cut an appropriate size and place it in the above-m...

Embodiment 2

[0045] Metal mold manufacturing

[0046] According to the component structure on the actual device, a set of molds are made of ordinary carbon steel. The inner surface of the mold has a smooth finish of more than 10, and the width of the mold flanging plane is more than 2cm. An overflow groove with a width of about 1cm is set at a distance of about 1cm from the inner edge of the lower mold flanging plane, and a number of screw holes are processed outside the overflow groove to cooperate with the bead to seal the soft rubber mold. Heat exchange pipes are placed inside the upper and lower molds, and the temperature is controlled by a mold temperature machine.

[0047] When manufacturing the rubber soft mold, first seal the overflow groove with an O-ring, and select a 10-20mm thick raw rubber sheet to place in the lower mold. The area is based on the mold surface area plus the mold flanging area. Set the vulcanization pressure, temperature and time according to the vulcanization proc...

Embodiment 3

[0050] Rubber soft mold manufacturing

[0051] The following uses silicone rubber and nitrile rubber as examples to illustrate the soft mold manufacturing method.

[0052] 1. Silicone rubber soft mold manufacturing

[0053] Put the silicone rubber green sheet with a thickness of 10mm into the metal female mold, slowly lower the metal male mold, vulcanize at 5MPa and 130°C for 30 minutes, eliminate the vacuum, and raise the temperature to 220°C for 20 hours for secondary vulcanization. Take it out and cut it into a soft rubber mold.

[0054] 2. Manufacturing of nitrile rubber soft mold

[0055] Put a nitrile rubber green sheet with a thickness of 12mm into a female metal mold, slowly lower the male mold, and vulcanize at 3MPa and 180°C for 25 minutes. Take it out and cut it into a soft rubber mold.

[0056] 3. Fluorine rubber soft mold manufacturing

[0057] Put a 20mm thick fluororubber green sheet into a female metal mold, slowly lower the male mold, and vulcanize at 3MPa and 160°C for...

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Abstract

The invention relates to a forming method for a thermosetting polymer fiber composite workpiece. The method comprises the following steps that a metal mold and a rubber soft mold are manufactured; a plurality of hooks are bonded to the front face of the rubber soft mold; supports capable of being automatically lifted are arranged at the periphery of a metal female mold; plurality of cross beams are arranged on the supports; ropes are fixed to the cross beams and used for being connected to hooks on the rubber soft mold; multiple pieces of fabrics are laid according to different directions andmove in the female mold as a whole, the rubber soft mold covers the fabrics, the peripheral flanges are tightly fixed to a plane around the female mold, and a polymer material is rapidly injected andcompacted, so that the material is completely infiltrated into the fiber fabric, the polymer material is heated to react until the polymer material is completely cured, and the workpiece is taken out.According to the method, the rapid injection of the polymer material and the uniform distribution and good infiltration of feed liquid are guaranteed, the flow state of the material can be directly observed, and the defects such as bubbles or dry spots and the like can be effectively prevented; and the method does not need a huge mold closing device, so that the investment and production costs are reduced, the efficiency is high, and the energy consumption is low.

Description

Technical field [0001] The invention belongs to the technical field of resin-based fiber-reinforced composite material molding, and specifically relates to a molding method of thermosetting polymer fiber composite materials, which is suitable for molding large-curved or large-size profiled cross-section shell components. Background technique [0002] In recent years, thermosetting polymers and their fiber-reinforced composite materials (FRPC) have been widely used, ranging from airplanes, high-speed rails to automobiles and yachts, from environmental protection chemicals, sports equipment to bicycles, fishing rods, etc. These high-strength, light-weight and heat-resistant Corrosion-resistant high-performance materials all play an important role. Components made of composite materials have light weight, high strength, and high rigidity, which play an important role in reducing weight, reducing noise and vibration, improving safety, comfort, and reducing maintenance. They have beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/48B29C33/40B29K23/00B29K63/00B29K75/00
CPCB29C70/48B29C33/405B29K2023/38B29K2075/00B29K2063/00
Inventor 白大成胡新举潘东野姚汉伟杨超
Owner 长春三友智造科技发展有限公司
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