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A continuous fiber reinforced thermoplastic resin vacuum bag compression molding device and method

A technology of reinforced thermoplastic and continuous fiber, which is applied in the field of composite material manufacturing, which can solve the problems of poor combination of fiber and resin matrix interface, dehydration and degassing of resin raw materials, and impact on application performance, so as to reduce the volatilization of toxic resin vapor and strengthen Impregnation and bonding effects, effects of overcoming temperature gradients

Active Publication Date: 2022-04-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing thermoplastic resin-based vacuum bag molding, such as patents: CN201610943844.9 and CN202010268476.9, do not carry out strict dehydration and degassing treatment on the resin raw materials, and the porosity of the obtained products is relatively high, and the interface between the fiber and the resin matrix cannot be well combined , which has a significant impact on application performance

Method used

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  • A continuous fiber reinforced thermoplastic resin vacuum bag compression molding device and method
  • A continuous fiber reinforced thermoplastic resin vacuum bag compression molding device and method
  • A continuous fiber reinforced thermoplastic resin vacuum bag compression molding device and method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0072] 50 parts by weight of caprolactam, 2 parts by weight of sodium caprolactam and 0.5 parts by weight of methyl silicone oil, 50 parts by weight of caprolactam, 2 parts by weight of hexamethylene-1,6-diformyl caprolactam and 0.5 parts by weight of methyl silicone oil are added to the resin The two resin tanks of the device 1 are heated to 90°C, kept in a stirring state, mixed evenly, and introduced into the raw material pretreatment device 2 through a conduit, and dehydrated and degassed through the heating flow channel 20 in the vacuum chamber 19, and then passed The diversion hole 11 enters into the material storage chamber 22, where it is heated to 100° C. and maintained.

[0073] Cut the glass fiber cloth into a shape of suitable size, apply the release agent 33 on the mold 34, lay the glass fiber cloth 31, the release cloth 30, the diversion net 29, the glue injection seat 27 in sequence, and use the vacuum bag film 28 to place the preformed The immersion body is seal...

specific Embodiment 2

[0077]Put 50 parts by weight of caprolactam, 4 parts by weight of caprolactam magnesium bromide and 1 part by weight of simethicone oil, 50 parts by weight of caprolactam, 4 parts by weight of N-acetylated caprolactam and 1 part by weight of simethicone oil into the resin supply device 1 The two resin tanks are heated to 110°C, kept in a stirring state, mixed evenly, and then introduced into the raw material pretreatment device 2 through a conduit, dehydrated and degassed through the heating flow channel 20 in the vacuum chamber 19, and enter the storage tank through the diversion hole. In the material cavity 11, it is heated to 100°C and maintained therein.

[0078] Cut the glass fiber cloth into a shape of suitable size, apply the release agent 33 on the mold 34, lay the glass fiber cloth 31, the release cloth 30, the diversion net 29, the glue injection seat 27 in sequence, and use the vacuum bag film 28 to place the preformed The immersion body is sealed. The discharge po...

specific Embodiment 3

[0082] 50 parts by weight of caprolactam, 6 parts by weight of sodium ethylate and 1.5 parts by weight of sodium stearate, 50 parts by weight of caprolactam, 6 parts by weight of isophthalyl dicaprolactam and 1.5 parts by weight of sodium stearate are placed in the resin supply device respectively The two resin tanks are heated to 100°C, kept in a stirring state, mixed evenly, and then introduced into the raw material pretreatment device through a catheter, dehydrated and degassed through the heating flow channel in the vacuum chamber, and enter the storage chamber through the diversion hole , in which heated to 100 ° C and maintained.

[0083] Cut the carbon fiber cloth into a shape of suitable size, apply the release agent 33 on the mold 34, lay the carbon fiber cloth 31, the release cloth 30, the guide net 29, and the injection seat 27 in sequence, and use the vacuum bag film 28 to seal the prepreg seal. The discharge port 25 of the raw material pretreatment device 1 is co...

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Abstract

A continuous fiber reinforced thermoplastic resin vacuum bag press forming device and method, with nylon as the matrix and continuous fiber as the reinforcement. The vacuum bag compression molding device includes a resin supply device for supplying raw materials, a raw material pretreatment device for dehydrating and degassing mixed raw materials and temperature control, and a reaction molding device that can heat simultaneously and uniformly. After the raw materials are heated, melted, stirred and mixed in the resin supply device, they are dehydrated, degassed, heated and kept in the raw material pretreatment device, and flow into the reaction molding device under the action of pressure, where they are reacted and solidified to form, and finally continuous fiber reinforced nylon is obtained. Composite products. The invention realizes that the resin matrix is ​​fully impregnated in the continuous fiber and heated inside and outside at the same time, and the continuous fiber reinforced nylon composite material product with good interface bonding, low porosity and excellent performance is obtained, and the vacuum degassing and uniformity of the composite material product are realized. Integrated molding such as heating and high temperature dehydration reduces energy consumption and cost.

Description

technical field [0001] The invention belongs to the field of composite material manufacturing, and in particular relates to a continuous fiber reinforced thermoplastic resin vacuum bag press forming device and a forming method using the device. Background technique [0002] Vacuum bag molding process is a method of continuous production of composite profiles. Based on the use of flexible molds, under the low pressure of the vacuum pump, the resin is pumped into the laid and packaged mold to infiltrate the reinforcement. It is a production process that reacts and solidifies under low temperature heating, and then demoulds and repairs after being cooled to room temperature naturally to obtain a composite material with relatively good performance. Due to its low process cost, good product quality and performance, and simple process operation, the vacuum bag compression molding process has gradually become a hot spot of people's attention and research, and has been widely used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54C08J5/04C08L77/02
CPCB29C70/342B29C70/54C08J5/043C08J5/042C08J5/045C08J2377/02
Inventor 贾明印董贤文薛平
Owner BEIJING UNIV OF CHEM TECH
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