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Composite friction plate and preparation method thereof

A friction plate and composite material technology, applied in the field of material science, can solve the problems of low mechanical strength, low mechanical strength, large molding shrinkage rate, etc., and achieve the effects of stable product quality, simple production process and excellent wear resistance.

Active Publication Date: 2012-10-03
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the wear-resistant layer materials of the common composite friction plates on the market include polytetrafluoroethylene, ultra-high molecular weight polyethylene or nylon materials. Although the wear-resistant layer of polytetrafluoroethylene and ultra-high molecular weight polyethylene have corrosion resistance , anti-aging, low friction coefficient, etc., but it also has the characteristics of low mechanical strength, large molding shrinkage, difficult secondary processing, low hardness, poor wear resistance, and poor creep resistance. It is used in PTFE wear-resistant There are shortcomings such as low mechanical strength and poor wear resistance on the chip, and the service life cannot meet the requirements
Nylon material also has a stable coefficient of friction and low wear, but nylon's water absorption and low heat resistance limit its application in high-demand friction materials

Method used

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preparation example Construction

[0027] The present invention also provides a preparation method for the wear-resistant layer, the steps are as follows: (a) batching and mixing: weigh 45-85 parts of the base resin, 10-30 parts of the wear-resistant material, and 5-30 parts of the reinforcing material. Add 25 parts into a high-speed mixer and stir for 3-5 minutes to mix evenly. The evenly mixed raw materials are dried at a temperature of 130±5°C for 3-4 hours; (b) Extrusion granulation: pass the dried mixed raw materials through a resistant High-temperature special twin-screw extruder for melt extrusion and granulation, extrusion temperature: 270~390°C, host speed: 200~250 rpm, extruded pellets are dried at 130±5°C for 3~4 hours; ( c) Injection molding: The dried pellets are injected into wear-resistant layer products through a special injection molding machine. The injection temperature is 280~400°C, the mold temperature is 120~160°C, the injection pressure is 70~100MPa, and the screw speed is 50~100 rpm, the...

Embodiment 1

[0033]Embodiment 1, the ratio of raw materials for wear-resistant layer 2, in parts by weight: 55 parts of polyphenylene sulfide, 25 parts of polytetrafluoroethylene, 5 parts of molybdenum disulfide, 15 parts of carbon fiber powder; stir and mix in a high-speed mixer , The uniformly mixed raw materials are dried at 130°C for 4 hours, and the dried mixed raw materials are melted and extruded into granules through a high-temperature-resistant special twin-screw extruder. The extrusion temperature is 270-390°C, and the host speed is 240 rpm. The extruded pellets are dried at a temperature of 130±5°C for 4 hours, and the dried pellets are injected into wear-resistant layer 2 products through a special injection molding machine. The injection temperature is 280~400°C, the mold temperature is 140°C, and the injection pressure is is 80MPa, the screw speed is 90 rpm, and the finished product of wear-resistant layer 2 is obtained.

[0034] Lay 20 layers of polyester fiber cloth neatly ...

Embodiment 2

[0035] Embodiment 2, the difference from Embodiment 1 is: the ratio of raw materials for the wear-resistant layer 2, in parts by weight: 40 parts of polyphenylene sulfide, 15 parts of polyphenylene, 22 parts of polytetrafluoroethylene, disulfide 5 parts of molybdenum, 3 parts of graphite, 15 parts of carbon fiber powder.

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Abstract

The invention provides a composite friction plate and a preparation method thereof. The composite friction plate consists of a wear-resistant layer and a loading layer, wherein the wear-resistant layer is made from basic resin, wear resistant materials and reinforcing materials by blending, modifying and injection molding; the loading layer is a fiber-reinforced epoxy resin composite material; and the loading layer and the wear-resistant layer are bonded by hot pressing to form the composite friction plate. The composite friction plate overcomes the problems in the prior art, such as poor wear resistance, poor mechanical property and poor heat resistance; and has excellent wear resistance and good mechanical property. Besides, the composite friction plate is formed in a way that the loading layer is formed and simultaneously bonded with the wear-resistant layer by hot pressing, which simplifies the production process, increases the production efficiency and ensures stable quality of the product. The product can be widely applied in the fields of automobiles, war industry, wind power generation equipment and the like.

Description

technical field [0001] The invention relates to a friction plate and a preparation method thereof, in particular to the preparation of an epoxy resin reinforced material and a special engineering plastic wear-resistant material, and the thermocompression bonding of the two materials, belonging to the field of material science. Background technique [0002] A friction plate is a component used in power machinery that relies on friction to perform braking or transmission. Any mechanical equipment and moving vehicles must have brakes or transmissions, and friction plates are the key components of these brakes and transmissions. Its main function is to absorb and transmit power through friction, such as the clutch plate transmits power, and the brake plate absorbs kinetic energy. They enable mechanical equipment and various motor vehicles to work safely. Friction plates are widely used in various engineering machinery such as automobiles, trains, airplanes, military industry, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C08L81/02C08L61/16C08L67/00C08L27/18C08K3/04C08K3/30C08K7/06B29B9/06B29C70/36B29C70/54
Inventor 张志军邓凯桓龙春光刘爱学王全兵
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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