A kind of pvc pipe production process

Abstract

The invention discloses a PVC pipe production process, including: a. Raw material mixing: put various raw materials into a mixer, make the raw materials uniformly mixed through hot mixing and cold mixing steps, and collect the mixed raw materials in the dry material Standby in the warehouse; b. Plasticization: put the material into the extruder, the material in the extruder passes through the shearing of the screw and the effect of external heat, and enters the head of the extruder after being plasticized on average. The machine head is endowed with a certain shape, and leaves the extruder after being further plasticized; c, shaping: the pipe after the initial molding of the machine head first enters the spray sizing box, the pipe passes through the sizing sleeve, and is sprayed on the outer wall of the pipe Vacuum is pumped in the shower sizing box, so that the pipe is subjected to internal pressure and clings to the inner wall of the sizing sleeve, and at the same time the pipe is cooled and formed under the action of spray water; d. Pipe processing: the pipe that is completely cooled in the spray sizing box Under the action of the machine, it advances at a constant speed. Under the control of the metering device, the planetary saw cuts the predetermined length of the pipe, and after the flaring process, the production of the pipe is completed.

Description

technical field [0001] The invention belongs to the technical field of PVC pipe production, and in particular relates to a PVC pipe production process. Background technique [0002] PVC is the abbreviation of (Polyvinylchlorid), the main component is polyvinyl chloride, and other components are added to enhance its heat resistance, toughness and ductility; the top layer of this surface film is lacquer, and the main component in the middle is polyvinyl chloride. Vinyl chloride, the bottom layer is back-coated adhesive. [0003] It is a synthetic material that is loved, popular and widely used in the world today; its global usage ranks second among all kinds of synthetic materials; China's production capacity is about 5 million tons, while its consumption is 5.3 million tons. In Germany, PVC production and consumption average 1.4 million tons. [0004] The first step in the production of PVC pipes needs to mix various raw materials together. Usually, the mixing of raw mater...

AI Technical Summary

Problems solved by technology

[0004] The first step in the production of PVC pipes needs to mix various raw materials together. Usually, the mixing of raw materials has to go through two steps of hot mixing and cold mixing. The existing operation is to put the raw materials into the hot mixer for hot mixing. After the hot mixing is completed, put the raw materials into the cold mixer to complete the cold mixing treatment of the raw materials. During the mixing process, the raw materials need to be transported between two devices, which affects the production efficiency of PVC pipes.

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