Glass fiber dispersion and guide device

Abstract

A glass fiber dispersing and guiding device comprises a rectangular shell and a frame arranged in the shell. An impregnation pool is arranged inside the shell, a front retaining plate is arranged on one side of the frame, multiple glass fiber inlets are uniformly arranged on the front retaining plate, the front retaining plate blocks one of die cavity ports after the frame is inserted into the impregnation pool, multiple glass fiber outlets are arranged on a side, opposite to the front retaining plate, of the frame, the glass fiber outlets and the glass fiber inlets are uniform in number, the glass fiber inlets are obliquely arranged on the front retaining plate, a tension shaft and multiple mutually-parallel guiding rollers are sequentially arranged in the frame, a rear retaining plate is arranged at the other die cavity port on the shell, copper nozzles corresponding to the glass fiber outlets are arranged on the rear retaining plate, a passage is arranged inside each copper nozzle, and a melt inlet is arranged above the shell. The glass fiber inlets which are oblique are used, so that production suspension caused by the fact that a lot of melt flows back and rushes out of the glass fiber inlets when blockage occurs is avoided, glass fibers can be drawn at higher speed, and production speed is increased.

Description

technical field [0001] The invention relates to composite material modified bracing process equipment, in particular to a glass fiber dispersing and guiding device. Background technique [0002] Long glass fiber-reinforced thermoplastic is a new light-weight and high-strength material, which has been widely used in industries such as automobiles and white goods. The key to the production of long glass fiber reinforced polypropylene lies in the interfacial bonding between glass fiber and polypropylene. It is required that the glass fiber can be effectively unbundled and impregnated in molten polypropylene to achieve a good interfacial bonding effect. [0003] Generally speaking, the viscosity of polypropylene in the molten state is greater than 100 centipoise. Under such a viscosity, it takes a long time for the existing impregnation cavity to achieve the effect of fully opening and impregnating the glass fiber. Low production efficiency, lack of commercial value and other i...

AI Technical Summary

Problems solved by technology

[0004] 1. When the glass fiber enters and leaves the impregnation tank of the impregnation cavity, the level is the same. In order to ensure the full contact between the glass fiber and polypropylene, the liquid level of the molten polypropylene in the impregnation tank must be higher than the height of the glass fiber entering the impregnation tank. , when the sliver is drawn normally, the glass fiber is unbundled by the guide roller and impregnated with polypropylene at the same time to form a composite strip and leave the impregnation tank, but once the glass fiber breaks or the material is too much, the liquid pressure in the impregnation tank increases , because the outlet size of the glass fiber is smaller than the inlet size, the material in the dipping tank will flow out of the glass fiber inlet position in reverse, affecting production;

[0005] 2. The impregnation cavity of the prior art relies on the opening of the guide rollers and the reflux of the melt to impregnate the glass fiber. The volume of the required melt is very large, and when the polypropylene is heated into a melt, it is in the impregnation cavity. The temperature of each part varies from high to low. In high temperature areas such as the four corners of the mold cavity, carbon deposits are prone to occur on the top and bottom, and carbon deposits will lead to performance degradation of glass fiber products;

[0006] 3. The guide rollers in the prior art are installed in the impregnation cavity, it is difficult to clean the residual materials, and the efficiency of disassembly and assembly is low

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