The process of extrusion molding of plastic pipes
Time：
2019-08-16
First, plasticization of the raw material: through heating and mixing in the extruder, solid raw materials are transformed into a uniform, viscous melt. Second, shaping: under the action of the extruder’s die and die‑head, the molten material is continuously forced through the die at a specified pressure and velocity, thereby attaining a desired cross‑sectional profile. Third, cooling and setting: by means of sizing and cooling processes, the molten material is fixed in its newly formed shape and solidifies (as in the case of plastic pipes). These three stages are accomplished using the main machine and auxiliary equipment—collectively referred to as the extrusion unit. Specifically, the main machine is the extruder, while the auxiliary equipment comprises the die head, sizing device, cooling system, traction unit, and cutting apparatus.
1. Raw material plasticization: through heating and mixing in the extruder, solid raw materials are transformed into a uniform, viscous fluid.
II. Molding: Under the action of the extruder’s die, the molten material is continuously forced through the die at a specified pressure and velocity, thereby attaining the desired cross-sectional shape.
3. Cooling and shaping: The molten material is cooled and shaped to lock in its acquired form, transitioning into a solid state (as in plastic pipes).
The three stages described above are accomplished using the main and auxiliary machines, collectively referred to as the extrusion unit. Specifically, the main machine is the extruder, while the auxiliary equipment comprises the die head, sizing device, cooling system, traction unit, cutting apparatus, and material‑stacking rack.
Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise that integrates the research and development, manufacturing, and sales of complete sets of extrusion equipment for rubber, silicone, and plastics.
The company’s main products include rubber extruders, rubber hose extrusion lines, three‑layer composite stone‑plastic production lines, silicone stone‑plastic production lines, plastic sealing strip production lines, plastic profile production lines, plastic pipe production lines, elastomer extruders, and other extrusion equipment, as well as manufacturing equipment for engineering seals, automotive seals, wire and cable components, air‑conditioning hoses, braided hoses, automotive fuel hoses, waterstop strips, and related products.
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