Direct on-line molding apparatus for long fiber-reinforced thermal plastics

Abstract

The invention provides a direct on-line molding apparatus for long fiber-reinforced thermal plastics. The direct on-line molding apparatus comprises a steel platform, an extruding device, a metering feeding device and a glass fiber adding device, wherein the extruding device comprises an extruder, the central part of the extruding device is provided with a glass fiber introducing port, and the glass fiber adding device comprises a glass fiber heating device arranged above the glass fiber introducing port. According to the invention, only one extruder is arranged, a glass fiber enters the central part of the extruding device, is cut by a screw and is then directly mixed with a master batch, so intermediate transition distance does not exist; through additional installation of the glass fiber heating device, moisture in the glass fiber is removed and the glass fiber undergoes preheating treatment, which is more beneficial for mixing of the glass fiber and the master batch and for improvement of product quality; the addition amount of the glass fiber is controlled through the rotating speed of the screw of the main engine; when the amount of the introduced master batch is constant, the rotating speed of the screw is increased, the addition amount of the glass fiber is increased accordingly, so the content of the glass fiber is increased, or otherwise, the content of the glass fiber is decreased.

Description

technical field [0001] The invention relates to a plastic molding equipment, in particular to a long-fiber reinforced thermoplastic direct on-line molding equipment. Background technique [0002] The traditional production of long fiber reinforced plastics uses long fiber reinforced thermoplastics direct in-line forming machines (LFT-D for short), see figure 1 As shown, the extrusion device of the molding machine is to control the master batch to enter the first-stage extruder 91 through the feeding port, and then enter the first-stage barrel 93 of the second-stage extruder 92 along the material channel; the glass fiber is cut by the glass fiber. After the extruder 94, it enters the first-stage barrel 93 along the glass fiber channel. Above the first-stage barrel 93, the masterbatch and the glass fiber share a channel. The manipulator is put into the press to realize the direct in-line molding of long fiber reinforced thermoplastics. [0003] Because the glass fiber enters...

AI Technical Summary

Problems solved by technology

[0003] Since the glass fiber enters the second-stage extruder 92 after being cut 94 by the glass fiber cutter, there is a certain distance between the cutting and the entrance of the first broken barrel 93 in the second-stage extruder 92, and the flow of the glass fiber itself The performance is extremely poor, and it is easy to build a bridge. After the bridge, the amount of glass fiber entering the main machine will be uneven, which will directly lead to the instability of the glass fiber content of the product, thereby affecting the product quality, and the two extruders are running at the same time, which increases a large amount. The cost of electricity, water and labor costs, while increasing the maintenance of the machine, maintenance and other issues

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