You Should Know Common Types of Rubber Extruder


Plunger
The rubber extruder originated in the 18th century. The manual piston extruder used to manufacture seamless lead pipes manufactured by Joseph Bra mah in England in 1795 is considered to be the world's first machine. Since then, in the first 50 years of the 19th century, e

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Plunger
The rubber extruder originated in the 18th century. The manual piston extruder used to manufacture seamless lead pipes manufactured by Joseph Bra mah in England in 1795 is considered to be the world's first machine. Since then, in the first 50 years of the 19th century, extruders were basically only used in the production of lead pipes, the processing of macaroni and other foods, the brick and ceramic industries.


In the development process of the extruder as a manufacturing method, the first clear record was R. B ro o o m an applied for a patent in 1845 for the production of Gutebo glue wires with an extruder. H. B e w l g y then improved the extruder, and in 1851 used it to wrap the copper wire of the first submarine cable between Dover and Carai s. In the following 25 years, the extrusion method 13 became more important, and the extruder that was operated by electric motors quickly replaced the previous manual extruder. The early mechanically operated plunger extruder produced thousands of kilometers of insulated wires and cables, thus firmly establishing the position of extrusion for the production of cables. Early extruders for cable production were all plunger types, whether they were manual, mechanical or hydraulic. In this production process, the plunger presses the hot gutta-percha into the die with the copper wire, and the gutta-percha is extruded from the die, thus covering the copper wire to form an insulating layer.

Screw type
The rubber extruder that appeared in 1870 was a hot feed extruder. The rubber material it feeds must be heated and smelted, and the feed is uniform, stable, and constant, and the material temperature is maintained at 50 to 70 ℃. The screw is short, the thread groove is deep, and the homogenization effect is not ideal. Since the 1970s. At one time, the aspect ratio became smaller. Because the hot-feeding extruder can continuously extrude, the operation is simple, the production efficiency is high, and the shape of the extruded product is stable, the hot-feeding extruder is still used in the production process of many products. In tire production, it is used for the extrusion of various treads and various types of rubber, as well as for the extrusion of rubber and rubber blanks in the production of hoses, cables and other rubber products.


normal type
The cold feed extruder appeared in the 1940s, and began to be promoted and popularized in the 1960s, and became the mainstream of development in the 1980s. By the early 1990s, products produced by cold-feed extruders in developed countries such as Europe and the United States accounted for 95% of total production. There are separate screw extruders, baffle screw extruders, cavity screw extruders, transfer mixing extruders, pin screw extruders and multi-channel transfer mixing screw (MCT) extruders, etc. .

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