The extruder of extruder is composed of extrusion system, transmission system and heating cooling system.
Extrusion system:
The extrusion system comprises a screw rod, a cylinder, a hopper, a machine head, and a mold, wherein the plastic is plasticized into a uniform melt through the extrusion system, and the continuous extrusion die is driven by the screw under the pressure.
It is the main component of screw extruder, it is directly related to the scope of application of the extruder and productivity, made of alloy steel by high strength corrosion resistance.
The barrel is a metal cylinder made of composite steel pipe with heat resistance, high tensile strength, abrasion resistance, corrosion resistance of alloy steel or alloy steel lining. The utility model is matched with the screw barrel to realize the crushing, softening, melting, plasticizing, exhausting and compaction of the plastic, and continuously and uniformly conveying the rubber to the molding system. The length of the barrel is 15 to 30 times the diameter of the cylinder, so that it can be fully heated and fully plasticized.
The hopper is arranged at the bottom of the hopper: cut off device, so as to adjust and cut off the material flow, the hopper side is provided with a sight hole metering device and calibration.
The 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 plastic molding pressure necessary to give. Plastic in the cylinder plastic compaction, through the porous filter plate along the channel through the head neck into the die mold, mold die sleeve with the appropriate form, the annular space section decreases, the plastic melt formed around the tubular continuous dense core wire coating. In order to ensure that the plastic flow in the head is reasonable and the dead angle of the accumulated plastic is eliminated, the utility model is characterized in that the utility model is provided with a shunting sleeve. The die is also provided with a device for correcting and adjusting the mould, which is convenient to adjust and correct the concentricity of the die core and the die sleeve.
According to the direction of the flow direction of the head and the angle of the center line of the screw, the extruder is divided into an oblique angle head (angle 120o) and a right angle handpiece. The head of the shell is fixed on the machine body by bolts, die inside the core seat, fixed in the head line port and nut, a core mold core seat in front of the core and core seat with center hole, used by the core line, a pressure equalizing ring in the front end, for balanced pressure, squeeze the package consists of forming die and die, die sleeve position by a bolt through the support to adjust, to adjust the relative position of the die sleeve core, easy to adjust the uniformity of extrusion cladding thickness, die with the external heating device and temperature measuring device.