Extrusion is a process used to create objects of a fixed cross-sectional profile by pushing material through a die of the desired cross-section. Its two main advantages over other manufacturing processes are its ability to create very complex cross-sections; and to work with brittle materials, because the material encounters only compressive and shear stresses. It also creates an excellent surface finish and gives considerable freedom of form in the design process.
Extrusion may be continuous (theoretically producing indefinitely long material) or semi-continuous (producing many pieces). It can be done with hot or cold material. Commonly extruded materials include metals, polymers, ceramics, concrete, modeling clay, and foodstuffs. Products of extrusion are generally called extrudates.
Plastic extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation.
Double-walled Extrusion Line | Dual Wall Tubing Extrusion Line | Double wall Tubing Extruder
Main components of Dual Wall Heat shrink Tubing Extrusion Line;
Outer Layer Extruder+Inner Layer Hot Melt Adhesive Extruder–Composite Extrusion Die–Cooling &Shaping Water Tank—Tractor—Winder
Details of Dual Wall Heat Shrink Tubing Extrusion Line
1. The models of the outer layer extruder of the double-wall heat shrinkable tube are:
SJ-45 extruder, SJ-55 extruder, SJ-65 extruder, SJ-75 extruder, SJ-90 extruder.
2. The models of the inner layer hot melt adhesive extruder of the double-wall heat shrinkable tube are:
SJ-30 extruder, SJ-45 extruder, SJ-50 extruder, SJ-55 extruder, SJ-,65 extruder.
3. Double wall heat-shrink tubing composite extrusion die: within a certain range, it can be replaced with different specifications of molds to produce products of different specifications.
4. Cooling and shaping water tanks are divided into 2 types:
Immersion cooling tanks and vacuum cooling tanks.
The submerged cooling water tank is mainly used for extrusion cooling and shaping small-sized double-wall heat shrinkable tubes.
The vacuum cooling water tank is mainly used for extrusion cooling and shaping large-sized heat shrinkable tubes.
5. There are two types of tractors:
The double-roller traction machine (composed of 2 pairs of rubber rollers) is mainly used for extrusion traction of small-sized double-wall heat shrinkable tubes.
The crawler tractor (composed of 2 rubber belts) is mainly used for extrusion traction of large-sized heat shrinkable tubes.
6. Rewinder: large diameter rewinding disc, ready for the next step (preparation for electron accelerator irradiation)
7. The extrusion production line is equipped with a fully automatic vacuum feeder.
8. Equipped with a drying hopper, the models are: 25KG, 50KG, 75KG, 100KG
