does not contain aluminum, so the white layer after nitriding is less, the nitriding hardness is about HV800~HV950, and the effect of acid corrosion resistance hard chrome plating is good. Feed zone This section is the groove depth of the fixed screw groove, and its function is to be responsible for preheating and plastic solid conveying and pushing. 4. The cutting effect, in addition to gradually increasing the temperature of the plastic, conveys the plastic forward. Melt conveying zone (meltconveying zone)
when all the plastic is completely melted, it starts to enter this zone, and ends at the end of the plasticizing screw, maintaining a uniform temperature of the melt and a stable flow of the molten plastic. When the metering section is too deep, the compression ratio is insufficient, and the required feeding force is greater; when it is too shallow, it is easy to overfire and burn. It can be seen that the plastic plasticizing screw can be described as the heart component of the injection molding machine. Therefore, the plastic plasticizing screw has the functions of conveying, melting, mixing, compression and metering, and plays an important role in the quality of plasticization. The plasticizing screw can be divided into four zones according to its functions: 1. Third, improve the plasticating capacity (plasticatingcapacity).
The study of electric tools bearing screw is nothing more than thinking: First, improve the effect of dispersive mixing. Fourth, improve the uniformity of melt temperature. Improved dispersive mixing.) About 45~55%L2, compression zone (compression zone) This zone is the screw groove depth of the tapered screw, and its function is the melting, mixing, shear compression and pressurized exhaust of plastic raw materials. Its surface hardening hardness is up to HRC74, a super hard alloy with good wear resistance, its film density is as high as 98-99. The solid conveying zone (solidconveying zone) This zone is connected with the feeding funnel, and the plastic solid particles are tightly compressed to form a solid bed, which is sheared by the melt cylinder.) :