论文部分内容阅读
壁厚不均匀的压铸件,厚壁处容易产生缩孔:薄壁处难以成形。为此,作者设计了一种采用双冲头能满足两者要求的压射机构。保留了一般压射机构中的增压器,并且采用较高的压射速度,促使铸件的薄壁部分成形。现分别介绍如下: 一、压射机构的改进改进后的压射机构如图1所示。当按下“压射”按钮后,压射阀17动作,高压油经阀11及10进入压射缸内,推动外压射活塞5进行第一级压射(压射速度应适应)。在冲头未封住浇料口之前,合模力已由独立的增压系统增压到预定的合模吨位。当冲头封住浇
Non-uniform thickness of the die-casting, thick wall prone to shrinkage: difficult to shape the thin wall at. For this reason, the author has designed a shot-press mechanism which can meet the requirements of both by using double punch. Retaining the supercharger in a typical injection mechanism and using a higher injection velocity causes the thin-walled portion of the casting to be shaped. Are introduced as follows: First, the improvement of the injection mechanism Improved injection mechanism shown in Figure 1. When the “injection” button is pressed, the injection valve 17 is actuated. The high-pressure oil enters into the injection cylinder through the valves 11 and 10 to push the outer injection piston 5 to perform the first-stage injection (the injection speed should be adapted). Clamping force has been pressurized by an independent booster system to a predetermined clamping tonnage before the punch has not sealed the gate. When the punch sealed pouring