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Plastic Pipe and Tube Extrusion
Pipe and tubing come out of an extruder through a ring-shaped die with a pin in the middle: the melt flows round the pin and leaves as a hollow tube. Pressure inside the tube, or a vacuum sizer outside it, holds the diameter while it is cooled in water; a haul-off pulls it at a steady speed and a saw cuts it to length. PVC compound makes rigid pipe, plasticised (flexible) PVC makes clear vinyl tubing, HDPE makes pressure and drainage pipe. Aluminium is extruded the same way, cold enough to stay solid.
Abantado
Continuous (industrial)
Mga Tagubilin
1
1
Feed and melt
Feed and melt
Compound or pellets are fed from the hopper and melted along the heated screw.
Mga materyales para sa hakbang na ito:
Butil na PVC compound100 kg
Butil na HDPE100 kgMga kailangang kasangkapan:
Extruder ng plastik
Hopper na tagapagpakain ng pelet2
2
Form the tube
Form the tube
The melt is pushed through a screen pack and the ring die round its pin, leaving as a hollow tube.
Mga kailangang kasangkapan:
Extruder ng plastik
Die ng extrusion3
3
Size and cool
Size and cool
A vacuum sizer, or air pressure inside the tube, holds the outside diameter while water cools it.
Mga materyales para sa hakbang na ito:
Tubig500 litro4
4
Haul off and cut
Haul off and cut
A caterpillar haul-off pulls the pipe at a steady speed; a saw cuts it to length, or tubing is coiled.
5
5
Check
Check
Diameter and wall thickness are measured against the pipe standard.
Mga kailangang kasangkapan:
Digital na Kalibrador 6 PulgadaMga Materyales
3- 100 kgPlaceholder
- 100 kgPlaceholder
- 500 litroPlaceholder
Mga Kinakailangang Kasangkapan
4- Placeholder
- Placeholder
- Placeholder
- Placeholder
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