Vacuum pipe vacuum sizing sleeve setting zone basically vacuum chamber structure, the position near the entrance width is relatively small, usually 1 ~ 1.5mm high sizing sleeve and the arrangement was more intensive, because this time the beginning of the cooling tube high temperature, relatively soft, if the width is too large will sucked into the pipe surface which affect the appearance. As the tube is gradually cooled to harden, width can be increased to 3 ~ 4mm, slot spacing can be increased. Vacuum tank cooling effect is better than the vacuum holes, because the water forms a film through these slots to help slide the pipe sizing and cooling jacket enables cooling area increases. Therefore, the structure is good or bad vacuum forming region directly affect the cooling effect of the sizing sleeve, during the length of the high-speed sizing sleeve, the outer surface of the pipe must be hardened, leaving the tube when sizing sleeve, wall hardening depth must enough to support the weight of the tube, not deformed or broken, otherwise it will affect the dimensional accuracy of the tube. While also improve sizing sleeve length to increase the cooling effect, but there is the difficulty of processing, high production cost, convenient operation, caused by excessive friction, increase the traction power while the tube will produce stress, lower pipe surface finish. Therefore, the sizing sleeve length should be appropriate, generally about 10 to 12 times the inner diameter. Sizing sleeve suitably good thermal conductivity of metal pipe sizing sleeve, pipe sizing sleeve at home and abroad are working with the wear-resistant copper alloys. High-speed plastic pipe production design and production of the factory calibration sleeve with a vacuum calibration sleeve according to different plastic molding characteristics can be divided into: direct cooling curtain, disc type, spiral tank type, the user according to the production rate, product diameter, product selection of raw materials differently shaped structures. Achieve higher production speeds and the best product appearance. Company for PE recycled material specially designed pipe sizing sleeve ensures high-speed production, the product surface smooth vacuum calibration sleeve, sizing sleeve, day Nobuyasu provided by Qingdao day letter Thai Plastic Machinery Co., Qingdao day letter Thai Plastic Machinery Co., Ltd. (www.qdtianxintai.com) strong, credible, in Qingdao, Shandong granulator industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Tition Taihe you hand into the brilliant, for a better future!