Rubber helical gearing cold feed extruder

Abstract

A rubber helical gearing cold feed extruder comprises a framework, on which a plastified segment cylinder, a feed segment cylinder, a feed device, a variable speed driving device and a motor are arranged in regular turn. An extruding screw penetrates through the plastified extruding segment cylinder and the feeding segment cylinder and is connected with the variable speed driving device. The feed device is a helical gearing feed device which is connected with one side of the feed segment cylinder through a fastening piece and comprises a spiral roller arranged in a supporting seat. The surface of the spiral roller is provided with spiral roller threads corresponding to screw thread lead or thread pitch in the feed segment cylinder. The thread direction of the spiral roller is opposite to the thread direction of the screw in the feed segment cylinder. The invention has reasonable structural design, improves the feed capability and the transmission capability of the extruder, the quality of extruded products, the production efficiency and the market competitive power of enterprises and reduces the manufacture cost.

Description

technical field [0001] The invention relates to a polymer material extrusion molding equipment, in particular to a spiral meshing cold feed extruder suitable for rubber or plastic extrusion molding. Background technique [0002] Rubber extruder is one of the most basic molding equipment for rubber processing and molding. It is widely used in tire manufacturing, rubber hose manufacturing, sealing strip manufacturing, wire and cable manufacturing and waterproof sheet manufacturing in the rubber industry. [0003] In the 1880s, a rubber hot-feed extruder appeared. Due to its unique advantages such as simple structure, high production efficiency, easy manufacturing and continuous operation, the hot-feed extruder has been widely used in the rubber industry. Application, and become an important equipment in the rubber industry, and therefore occupied a dominant position in the rubber industry for 100 years. However, since the hot-feed extruder needs a whole set of huge preheating...

AI Technical Summary

Problems solved by technology

Its feeding technology and device still stay in the state of the side-pressure roller feeding technology and device of the hot-feed extruder, which leads to the following main problems in the current cold-feed extruder: (1) Although the extruder The plasticizing ability has been greatly improved, but the feeding ability cannot keep up with the plasticizing ability, which has caused the feeding technology to become the "bottleneck" of the development of the extruder; (2) The traditional side pressure roller feeding technology is based on the principle of friction feeding , its feeding and conveying capacity is affected by many factors, resulting in fluctuations in feeding and conveying capacity, which directly affects the extrusion pressure of the machine head, and then affects the stability of the extrusion process, resulting in the stability and uniformity of the quality of the extruded product , which has a great impact on the development of precision extrusion of various parts of high-precision radial tires today; (3) The main function of the side pressure roller is to "press", which is likely to cause the fed rubber to be squeezed into the bearings of the two end shafts of the side pressure roller to neutralize In addition to the side pressure roller, it leads to serious problems of shaft holding and glue leakage. These two serious problems are common in extruders at present, which greatly restricts the development of extruders; (4) also because the side pressure roller is based on friction feeding Material principle, low feeding efficiency, low conveying efficiency, affect the improvement of extruder efficiency; (5) complex structure, many parts, easy to cause mechanism failure and increase operating costs

On the other hand, at present, the extruder still adopts the reduction box of involute gear transmission in the transmission, and there are the following main problems: (1) The reduction box is bulky, and it is generally necessary to use a coupling to connect with the motor or use a belt drive to connect with the motor connection; (2) complex structure, generally requires three-stage transmission; (3) prone to failure; (4) low transmission efficiency; (5) high cost

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