抽芯機構在注塑模具設計的應用-外文翻譯-wenkub.com
2025-01-13 15:48 本頁面
【正文】 which ensures the realization of the corepulling and the better power distribution. The angle ejector guide block is made of nickel bronze and is fixed in the core plate. The mould is easily maintained and the precision of the angle ejector rod is ensured by using the angle ejector guide block. The angle ejector rod is fixed in the angle ejector slide which moves along the slide way of the ejector retainer plate. Whenthe mould is opened, the angle ejector rod moves with theejector retainer plate. The angle ejector block moves ahead with the angle ejector rod and moves in the side direction. So the corepulling is achieved. The angle ejector block returns to its original position in virtue of the angle ejector rod which is driven by the ejector retainer plate.IV. OVERALL STRUCTURE AND WORKING PROCESS OF THEINJECTION MOULDThe mould structure is shown in figure 6. The layout of two cavities in one mould and side gate are adopted. The ten corepulling mechanisms shown in figure 6 is reasonably designed and pact in terms of structure.Figure 6. Mould structureThe whole working process of the mould is as follow:The melt plastic flows into the cavity of the mould throughthe feed system and the mould is opened after full packing and cooling. The moving plate of the injection machine moves back together with the moving half of the injection mould and the mould opened between the parting face of the mould. The plastic parts are pulled from the cavities of mould and stay with the moving half of the mould. The angle pins fixed in the cavity plate guide the six slides in the moving half of the mould to finish corepulling. When the mould is opened for a fixed distance, the moving half of the mould stops moving back. The ejector rods of the injection machine move ahead and push forward the ejector plate of the mould with the ejector rods, angle ejector rods. Then the plastic parts are pushed out of the injection mould and corepullingis acplished during the ejecting. When ejector rods of the injection machine move just for 120mm, theejector mechanism stops moving and the plastic parts are taken out. The action of demoulding is pleted. When the mould is closed, the ejector rods of the injection machine move back. The mould ponents return to their original position in virtue of the return pins and the angle pins. The second working cycle begins after the mould is closed. V. CONCLUSIONThe mould structure is plicated. Ten corepulling mechanisms are designed reasonably in one mould anddemoulding of the plastic parts is realized. Many inserts and standard parts are used in the injection mould, so the econ
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