保定市模具制造有限公司

高速护坡模具温度会影响表面质量,流动性,收缩率,注塑周期以及变形等几方面.模具温度过高或不足对不同的材料会带来不同的影响.对热塑性塑料而言,模具温度高一点通常会改善表面质量和流动性,但会延长冷却时间和注塑周期.模具温度低一点会降低在模具内的收缩,但会增加脱模后注塑件的收缩率.而对热固性塑料来说,高一点的模具温度通常会减少循环时间,且时间由零件冷却所需时间决定.此外,在塑胶的加工中,高一点的模具温度还会减少塑化时间,减少循环次数.

High slope mold temperature affects the surface quality, liquidity, shrinkage, several injection molding cycle and deformation. The mold temperature is too high or lack of different materials will bring different effects. Of thermoplastic plastics, mold temperature a little higher will usually improve the surface quality and liquidity, but will extend the cooling time and the injection cycle. A low mold temperature will decrease in the mold shrinkage, but the shrinkage of injection molded parts increased after stripping. The thermosetting plastics, a little higher mold temperature will usually reduce the cycle time, the time and the time required by the parts of the cooling decision. In addition, in the plastic processing. A little higher mold temperature will reduce plasticizing time, reduce the number of cycles.

高速护坡模具表面有软点模具热处理后表面有软点,将影响模具的耐磨性、减少模具的使用寿命(1)产生原因 1)模具在热处理前表面有氧化皮、锈斑及局部脱碳.2)模具淬火加热后,冷却淬火介质选择不当,淬火介质中杂质过多或老化.(2)预防措施 1)模具设备热处理前应去除氧化皮、锈斑,在淬火加热时适当保护模具表面,应尽量采用真空电炉、盐浴炉和保护气氛炉中加热.2)高速护坡模具淬火加热后冷却时,应选择合适的冷却介质,对长期使用的冷却介质要经常进行过滤,或定期更换.

High slope mold surface heat treatment of soft mold surface with soft point, will affect the mold wear resistance, reduce the service life of the die (1) causes 1) die before heat treatment the surface oxide skin, rust and partial decarburization.2) quenching after heating, cooling and quenching medium improper quenching medium in too many impurities or aging. (2) preventive measures 1) heat treatment equipment should mould descaling, rust, surface quenching mold in the appropriate protection, should be used in heating furnace, salt bath furnace and.2 vacuum protective atmosphere furnace) high speed protection quenching cooling after heating and cooling should be selected the medium suitable for cooling medium, long-term use of regular filtration, or regular replacement.