单驱动双滑块分型抽芯在铅套半热流道压铸模中的应用

Application of Two-Slider Single Driving Parting Core-Pulling to Die Casting Die with Lead Sheath Semi Hot Runner

针对合金密度较大的铅套,首次尝试使用半热流道模具的热室压铸机生产,以减少合金液在模具浇道流动过程中产生的裹气及压射能量损耗。设置直浇道热作件支撑机构,降低热作件以热传导方式在模具剩余部分的热损耗,满足了锥浇道浇口套与热流道热作件的互换性要求。模具采用周而复始和谐而自然的分型面离合装置,提高了模具使用的稳定性。在一模多腔压铸型中,提出了一种单驱动双滑块分型抽芯机构,使模具结构更加合理,可有效地减小模具尺寸。

The lead sheath with high alloy density was produced using hot chamber machine with semi hot runner for the first time in order to reduce entrapped air and wasting of heat dissipation during alloy liquid flowing in the runner. Supporting mechanism for heating assembly of sprue was installed to reduce heating assembly＇s thermal loss in the rest of die, which met the exchanging need of sprue bush of taper runner and heating assembly of hot runner. Application of clutch ofjoint face that ran in cycles and harmoniously, increased the stability of die. In multi-cavity die casting die, a two-slider single driving parting core-pulling mechanism was put forward, which made the die structure more reasonable and decreased the die size effectively.