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Pultrusion method for thermoplastic composite material and forming die thereof

A composite material and pultrusion molding technology, applied in the field of thermoplastic composite pultrusion molding method and its molding die, can solve the problems of difficult operability, high viscosity of thermoplastic resin, etc., to improve impregnation effect, improve mechanical properties, time saving effect

Inactive Publication Date: 2006-02-08
SINOMA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of the thermoplastic resin, the operability of this method in industrial production is difficult.

Method used

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  • Pultrusion method for thermoplastic composite material and forming die thereof
  • Pultrusion method for thermoplastic composite material and forming die thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The thermoplastic fiber selects the applicant's self-made 2000dtex polypropylene fiber, which contains 5% carbon black, and the reinforcing fiber selects 200tex glass fiber, which are arranged alternately on the creel (2), and are directly passed through the guide at a weight ratio of 1:1. The yarn device (3) is plied and bundled into the preheating chamber (4). The temperature of the preheating chamber (4) is 200° C., and the heating method adopts electric heating. The fiber enters the preforming die (5) after coming out of the preheating chamber (4), and the preheated mixed fiber yarn enters the forming die (7) after coming out of the preforming die (5). The forming die selects a circular die with a diameter of φ5. It is divided into three sections, of which the heating section has two sections, the length of each section is 0.03 meters, and the length of the cooling section is 0.3 meters. The mold entrance angle of each heating section in the mold heating zone is 5°,...

Embodiment 2

[0047] The thermoplastic fiber selects the applicant's self-made 1000dtex nylon fiber, which contains 8% carbon black, and the reinforcing fiber selects 48tex high-strength glass fiber, and forms a mixed fiber yarn (1) after being unmerged and plyed at a weight ratio of 2:3 and placed on the creel Above, the mixed fiber yarn (1) is drawn from one creel, bundled through the yarn guide (3) and enters the preheating chamber (4). The temperature of the preheating chamber (4) is 270°C, and the heating method is heated by heat transfer oil. The fiber enters the preforming die (5) after coming out of the preheating chamber (4), and the preheated mixed fiber yarn enters the forming die (7) after coming out of the preforming die (5). The forming die selects a diameter φ10 round rod die, It is divided into three sections, of which the heating section has 5 sections, each section is 0.03 meters long, and the cooling section is 0.3 meters long. The mold entrance angle of each heating sect...

Embodiment 3

[0054] The thermoplastic fiber selects the applicant's self-made 1000dtex PET fiber, which contains 10% carbon black, and the reinforcing fiber selects the 48tex high-strength glass fiber produced by Nanjing Glass Fiber Research and Design Institute, and forms a mixed fiber after being expanded by a bulking machine at a weight ratio of 2:3. The yarn (1) is finally placed on the creel, and the mixed fiber yarn (1) is led out from one side of the creel, bundled through the yarn guide (3) and enters the preheating chamber (4). The temperature of the preheating chamber (4) is 280°C, the heating method can be electric heating. The fiber enters the preforming mold (5) after coming out of the preheating chamber (4), and the preheated mixed fiber yarn comes out of the preforming mold (5) and then enters the forming mold (7). The forming mold chooses a square mold with a diameter of 25×25 , The mandrel is 23×23, divided into two sections, each section is 0.04 meters in length, and the ...

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Abstract

The invention relates to a pultrusion method for thermoplastic composite, which takes fortifying fiber and matrix fiber as raw material, including the following steps: a. placing matrix fiber and fortifying fiber on the creel in the weight ratio of 95-20:5-80; b. loading the fortifying fiber and matrix fiber to demand scale into the preheat chamber by the thread wire and board and preheating them; c. loading the preheated mixed fiber tuft into the preforming die, so the tuft near to the entrance shape of the forming die; d. loading the preformed mixed fiber into the forming die. Certainly the performing die and forming die can be diad, with performing segment and forming segment in one die; e. after loading out from the forming die the section bar cooling and shaping to get products. The invention overcomes the socking problem of high molecular polymer, improving the socking effects of thermoplastic composites, and the mechanical property enhances dramatically.

Description

Technical field [0001] The invention relates to a pultrusion molding process of a composite material, in particular to a pultrusion molding method of a thermoplastic composite material and a molding die thereof. Background technique [0002] Pultrusion is a commonly used material forming method. The pultrusion method is mainly used for thermosetting resin-based composite materials. Patent CN1385296A (publication number) introduces the pultrusion process of glass steel pipes. In this patent, a pultrusion process suitable for large-diameter glass steel pipes is proposed. This process is also a commonly used method for pultrusion of thermosetting resins. At present, the thermoplastic pultrusion process is less industrialized. The thermoplastic pultrusion process at home and abroad mostly uses glass fiber rovings impregnated with thermoplastic resins, and then drawn into products through pultrusion dies. Due to the high viscosity of thermoplastic resins, they are not compatible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54B29C33/00
Inventor 赵谦费传军夏涛戴方毕黄建洧
Owner SINOMA SCI & TECH
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