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What Does Plastic Extrusion Exruder System Include?
Aug 28, 2017

The extrusion system comprises a screw, a barrel, a hopper, a die head and a mold. The plastic is plasticized into uniform melt by the extrusion system, and the extruder head is continuously pressed under the established pressure in the process.

(1) screw: it is the most important component of the extruder. It is directly related to the application range and productivity of the extruder. It is made of high strength corrosion resistant alloy steel.

(2) barrel: it is a metal cylinder. It is usually made of composite steel pipes of heat-resistant, high compressive strength, strong wear resistance, corrosion-resistant alloy steel or lined with alloy steel. Machine barrel and screw with the realization of plastic crushing, softening, melting and plasticizing, exhaust and compaction, and forming system of continuous uniform delivery of rubber material, general machine barrel length for the diameter of 15 ~ 30 times, in order to make the full plastic heating and fully plasticizing principle.

(3) hopper: the bottom of the hopper is equipped with a cut-off device in order to adjust and cut off the material flow, and the side of the hopper is equipped with a visual hole and a calibration measuring device.

(4) die head and die: die made of alloy steel and carbon steel inner sleeve is arranged in the outer sleeve, die mold, die is the role of the plastic melt change rotary motion parallel linear motion, uniform and stable the die sleeve, and give the necessary pressure to plastic molding, plastic in barrel plasticizing compaction, through the porous filter plate along a passage through the head neck into the die mold, die die sleeve with the appropriate, forming the annular space section decreases, the plastic melt formed around the tubular continuous dense core wire coating. In order to ensure that the plastic channel in the head is reasonable and the dead angle of the plastic accumulation is eliminated, a diversion sleeve is often arranged to eliminate the fluctuation of the pressure when the plastic is extruded, and also the equalizing ring is arranged. The die head is also provided with a die correcting and adjusting device, which is convenient for adjusting and correcting the concentricity of the die core and the die sleeve. A grading ring in the front end, for equalizing pressure; extruded forming part composed of die and die, die sleeve position by a bolt through the support to adjust, to adjust the relative position of the die sleeve core, adjustable extruded layer thickness uniformity. A heating device and a temperature measuring device are arranged outside the machine head.