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Molding device and preparation method for long fiber-reinforced nylon

A molding device and long fiber technology, which is applied in the field of molding device and preparation of long fiber reinforced nylon, can solve the problems of affecting product color stability, poor self-cleaning performance, and reducing production efficiency, so as to improve product color stability and production efficiency , Improve product color stability and improve production efficiency

Active Publication Date: 2013-05-01
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nylon melt stays in the local area for a long time, and gradually turns yellow. In addition, the self-cleaning property of the dipping head itself is poor and fiber breakage occurs due to fluctuations in fiber quality and fiber splicing quality during the production process. The nylon melt stays further and generates heat. Oxygen decomposition, yellowing and even carbonization seriously affect the stability of product color
However, after carbonization of nylon melt, the frequency of fiber breakage will increase, which greatly reduces production efficiency.

Method used

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  • Molding device and preparation method for long fiber-reinforced nylon
  • Molding device and preparation method for long fiber-reinforced nylon
  • Molding device and preparation method for long fiber-reinforced nylon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In Example 1, the overall structure schematic diagram of the molding device used is as follows figure 1 As shown, among them, the glass fiber 1 is drawn out from the creel 2, and after being flattened, it enters the tension regulator 3, and the inside of the tension regulator 3 is provided with a number of tension rollers 11 to adjust the tension of the glass fiber. 1 is preheated in the preheating device 4; then sent to the component 5 for inert gas protection, the component 5 for inert gas protection is an inert gas air curtain machine, and the air outlet of the air curtain machine is transported with the glass fiber 1 The channels are connected, and the air outlet of the air curtain machine continuously outputs inert gas to form an air curtain, through which the inert gas air curtain can prevent the air contained in the glass fiber 1 delivery channel from entering the impregnation head, and play the role of inert gas protection . Under the protection of inert gas, t...

Embodiment 2

[0043] In embodiment 2, the overall structure schematic diagram of the molding device used is as follows figure 1 As shown, among them, the glass fiber 1 is drawn out from the creel 2, and after being flattened, it enters the tension regulator 3, and the inside of the tension regulator 3 is provided with a number of tension rollers 11 to adjust the tension of the glass fiber. 1 is preheated in the preheating device 4; then sent to the part 5 protected by inert gas, which is a sealing member including at least one gas inlet. The seal includes a housing, an air inlet arranged on the housing, and a channel for inert gas flow inside the housing; the channel for inert gas flow communicates with the glass fiber 1 delivery channel. The inert gas enters the inside of the seal from the air inlet, and fills the channel for the flow of the inert gas, so that the glass fiber 1 is protected by the inert gas when passing through the inside of the seal, and at the same time prevents the air ...

Embodiment 3

[0045] In embodiment 3, the overall structure schematic diagram of the molding device used is as follows figure 1As shown, among them, the glass fiber 1 is drawn out from the creel 2, and after being flattened, it enters the tension regulator 3, and the inside of the tension regulator 3 is provided with a number of tension rollers 11 to adjust the tension of the glass fiber. 1 is preheated in the preheating device 4; then sent to the part 5 under inert gas protection, the part 5 under inert gas protection is a labyrinth seal, the structure of the labyrinth seal can refer to the labyrinth of the prior art seals. The structural diagram of the labyrinth seal can be as follows figure 2 shown. The labyrinth seal includes a housing 51, an air inlet 52 disposed on the housing, a labyrinth unit 53 disposed inside the housing, and a channel 54 disposed inside the housing for inert gas flow; The channel 54 communicates with the glass fiber 1 delivery channel 13 . The inert gas ente...

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Abstract

The invention discloses a molding device and a preparation method for long fiber-reinforced nylon. The molding device for the long fiber-reinforced nylon comprises an impregnation head, and a part used for performing inert gas shielding on fibers which are ready to enter the impregnation head is arranged at the front end of the impregnation head; and a passage for inert gas to flow is arranged inside the part for performing inert gas shielding, and is communicated with a fiber delivery passage. The preparation method for the long fiber-reinforced nylon adopts a melt impregnation method, and preheated fibers are delivered to the impregnation head under the protection of the inert gas of the part for performing inert gas shielding. The method can effectively prevent or delay yellowing and carbonization of nylon melts caused by thermo-oxidative aging in the production process of the long fiber-reinforced nylon, can prevent continuous filaments from fracturing in the head, so that product color stability and production efficiency of the long fiber-reinforced nylon are improved.

Description

technical field [0001] The invention relates to the field of modification of engineering plastics, in particular to a molding device and a preparation method of long fiber reinforced nylon. Background technique [0002] At present, long fiber reinforced nylon materials are mainly used in automotive materials, sports equipment and other fields, and many long fiber reinforced nylon materials are light-colored structural parts. The color stability of long fiber reinforced nylon materials has a great influence on its application. However, because the hydrogen on the methylene group adjacent to -NH- in the amide group in the nylon molecular chain has certain activity, it is easy to react with oxygen to form hydroperoxide at a certain temperature and thermal oxidation occurs. Especially in the process of polymerization, storage, processing and use, due to the action of heat, light, oxygen, heavy metal ions or mechanical shearing, nylon molecular chains are prone to auto-oxidation...

Claims

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Application Information

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IPC IPC(8): B29C70/50B29B9/02B29K105/08B29K77/00
Inventor 陈春华李永华陈锐张超罗忠富袁绍彦王灿耀
Owner KINGFA SCI & TECH CO LTD
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