twin screw extruder using the principle of the screw Published:2015-01-20 09:17:02 Text Size:【BIG】【MEDIUM】【SMALL】 twin screw extruder is the most important member of the screw extruder, it is directly related to the range of applications and productivity of the extruder, from high-strength corrosion resistant alloy steel. twin screw extruder barrel: is a seamless metal tube, usually with heat-resistant, high compressive strength, extremely resistant, corrosion-resistant steel or composite steel-lined steel pipe. Barrel and screw together to achieve plastic crushing, softening, melting, plastics, exhaust and compaction, and to forming a continuous uniform delivery system sizing. Its length is generally barrel diameter of 18: 1, so that the plastic is fully heated and fully plasticized principle. Hopper: cut off the bottom of the hopper is equipped with means to adjust and cut off the stream, depending on the side of the hopper is equipped with holes and calibrated measuring device. twin screw extruder and die head: head cover and carbon steel jacket consists of inner steel nose built with mold. The role of head of the rotary motion of the plastic melt into a parallel linear motion, uniform steady import die sets in, and given the necessary plastic molding pressure. Plastic barrel plastics compaction, neck and head through the porous filter plate mold flow into the nose along a certain runner through the core die sets appropriate with the formation of the annular space section constantly decreasing, the plastic melts forming a continuous dense tubular cladding layer surrounding the core wire. To ensure the plastic flow path within a reasonable head, eliminating the accumulation of plastic corners, often arranged with the manifold (sleeve), pressure fluctuations to eliminate plastic extrusion, also set equalizing ring. Machine head is also equipped with mold correction and adjustment device, easy to adjust and correct punch and die sets concentricity. Extruder in accordance with the direction and angle of the screw head stream centerline, will head into the bevel head (120 degrees) and right angle (90 degrees) nose. Head of the shell is bolted to the body, head inside the mold cores sit there and fixed in front of the nose into the line port, mold core seat fitted with a nut core, core and core seat the center hole for passing the core wire; fitted in front of the nose strap rings, for equalizing pressure; molding part extruded from the die and die sets composed of the socket, the position of the die case can be adjusted by the support bolt to adjust the relative position of the die housing mandrel, easy to adjust uniformity of the extruded cladding thickness. Head outside and the temperature measuring device is equipped with a heating device. plasticextruderchina.net/news/html/?474.html
Posted on: Wed, 21 Jan 2015 05:35:54 +0000
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