Production process special for PA66 plate product

Abstract

The invention provides a production process special for a PA66 plate product. The production process comprises the steps that plastifying extrusion is performed, specifically, a machine barrel is divided into three areas to be heated at the specific temperature, and the specific extrusion speed is adopted; forming / shaping is performed, specifically, a compression forming area is divided into twelve areas for temperature constancy, and melts are constantly cooled by a cooling forming area, finally solidified, crystalized and shaped to be extruded; and plate cutting is performed. According to aPA66 plate obtained by the production process, the situation of the dark color of the surface is greatly relieved, the situations of pores, bubbles and acne scars inside the PA plate are reduced, performance is greatly improved, the rate of the finished product is high, skewing and deformation of the product are obviously relieved, and the smoothness of the product is obviously improved.

Description

technical field [0001] The invention relates to a production process specially used for PA66 plate products. Background technique [0002] Unless specifically indicated otherwise, what is described in this section is not prior art to the present application and is not admitted to be prior art by inclusion in this section. [0003] PA66, commonly known as nylon-66, has high mechanical strength and hardness, wear resistance, heat resistance, and great rigidity, and can be used as engineering plastics. PA66 sheet extrusion molding is to add granular materials into the barrel of the extruder from the hopper, and the materials are conveyed forward and compacted by the friction between the inner wall of the barrel and the surface of the screw under the extrusion force of the screw rotation. The heating device and friction preheating on the outside of the barrel melt and plasticize under high temperature and high pressure conditions. Then, the continuously rotating screw pushes t...

AI Technical Summary

Problems solved by technology

[0025] The PA66 sheet produced by the above process has dark surface color, many internal pores, bubbles and pockmarks, poor mechanical properties of the finished product, low yield rate, and the product is skewed, deformed, and rough on the surface.

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