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Pipe Fitting Mould Process Conditions
- Jul 20, 2017 -

PE pipe mold injection molding The most important three conditions are temperature, Pipe Fitting Mould pressure and time: Temperature: PE pipe is a thick-walled parts, Pipe Fitting Mould in order to avoid the cooling temperature is too large lead to internal stress, barrel temperature should take a lower value. Barrel temperature distribution, generally from the hopper to the nozzle temperature from low to high, so that the smooth rise of plastic temperature to achieve the purpose of uniform plasticization. To prevent plastic overheating, Pipe Fitting Mould so the temperature near the nozzle section is slightly lower. Mold temperature on the inherent performance of products and the appearance of a great impact on the quality of PE, in addition to filling speed, the mold temperature will also directly affect the product of the crystallinity and crystal configuration. Therefore, the polyethylene (PE) pipe mold suitable for the use of medium mold temperature, for polyethylene (PE) materials, the cooling rate is appropriate, Pipe Fitting Mould the plastic crystallinity is moderate, with good physical and mechanical properties. Pressure: The pressure in the injection process includes both back pressure and injection pressure. When using a screw type injection molding machine, Pipe Fitting Mould the pressure at the top of the screw when the screw rotates is called back pressure.

In general, Pipe Fitting Mould the increase in back pressure increases the temperature uniformity and mixing uniformity of the polyethylene (PE) melt. Increasing the back pressure also facilitates the removal of the gas from the melt and increases the melt density to increase the injection volume of the machine. Pipe Fitting Mould For polyethylene (PE) raw materials, increasing back pressure increases the melt's temperature, composition and color uniformity. Time: During the entire molding cycle, the injection time and the cooling time have a decisive influence on the quality of the product.

For PE pipe fittings, it is now increasingly widely used in our lives. Pipe Fitting Mould Which injection molding technology accounted for about 80. Injection Molding PE pipe fittings are widely used in automobile, construction, household appliances, food, medicine and so on because of its forming, Pipe Fitting Mould precise size, Pipe Fitting Mould with inserts, high productivity, easy to realize modernization and less post-processing. The choice of plastic mold, for the production of plastic industry can receive good economic benefits is very critical, Pipe Fitting Mould therefore, mold designers understand the basic requirements of mold materials and select the appropriate material is necessary.

PE pipe mold working conditions and cold stamping die is generally required to work at 150 ℃ -200 ℃, in addition to a certain pressure, Pipe Fitting Mould but also to withstand the temperature. Pipe Fitting Mould Is based on the use of plastic molding mold conditions, different processing methods will be plastic mold with the basic performance requirements of steel generally summarized as follows:

PE pipe die hardness is usually below 50-60HRC, Pipe Fitting Mould after heat treatment of the mold should have sufficient surface hardness to ensure that the mold has sufficient stiffness. Mold in the work due to the filling and flow of plastic to withstand greater compressive stress and friction, requiring mold to maintain the shape of the accuracy and dimensional accuracy of the stability, Pipe Fitting Mould to ensure that the mold has sufficient service life. Pipe Fitting Mould Mold wear resistance depends on the chemical composition of steel and heat treatment hardness, so improve the hardness of the mold is conducive to improving its wear resistance.