Plastic extrusion molding method for efficiently machining ABS (acrylonitrile butadiene styrene) straight-tooth racks

Abstract

The invention discloses a plastic extrusion molding method for efficiently machining ABS (acrylonitrile butadiene styrene) straight-tooth racks and an extrusion tooth profile mold.The mold comprises a mold cavity, a core rod and a cooling and shaping sleeve, wherein the mold cavity defines a cavity and used for molding the straight-tooth racks, and tooth blanks are arranged on upper and lower inner surfaces of the cavity; the core rod is installed in the mold cavity and at least partially extends in the mold cavity to form upper and lower tooth profile cavities with the mold cavity, the mold cavity is provided with a mold input port and a mold output port, the mold input port is used for conveying ABS plastic in a molten state into the mold cavity, and the mold output port is used for conveying molded tooth profile piece blanks out of the mold cavity; and the cooling and shaping sleeve is located on the side of the output port of the mold cavity and used for cooling and shaping the tooth blanks. The method is simple in process, convenient to operate and higher in machining efficiency than an injection molding method.

Description

technical field [0001] The invention relates to the technical processing field of racks, in particular to a plastic extrusion molding method for efficiently processing ABS spur racks. Background technique [0002] ABS is a general-purpose thermoplastic engineering plastic developed in the 1940s. It is a plastic variety with excellent comprehensive mechanical properties. It has good rigidity, hardness, processing fluidity and high toughness. It is widely used in various fields and can be injection molded. , extrusion or thermoforming. According to statistics, in the molding and processing of plastic products, the output of extrusion molding products ranks first, accounting for more than half of the entire plastic products. [0003] With the continuous increase in the melting cost of metals and their alloys, and the rapid development of non-metal and polymer materials, more and more parts are made of non-metal and polymer materials. Among them, ABS materials in the plastic fa...

AI Technical Summary

Problems solved by technology

Compared with the original traditional injection molding process, this kind of processing method has greatly improved the material utilization rate, and the processing efficiency has also been improved. However, this kind of processing method uses the injection molding process, and its processing efficiency needs to be further improved.

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