注塑模外文翻譯word版-在線瀏覽
2024-10-02 00:49本頁面
【正文】 the impression layout gate’s design.A sprue is a channel through which to transfer molten plastic injected from the nozzle of the injector into the is a part of sprue bush,which is a separate part from the mold.A runner is a channel that guides molten plastic into the cavity of a mold.A gate is an entrance through which molten plastic enters the gate has the following function：restricts the flow and the direction of molten plastic；simplifies cutting of a runner and moldings to simplify finishing of parts；quickly cools and solidifies to avoid backflow after molten plastic has filled up in the cavity. slug wellThe purpose of the cold slug well,shown opposite the sprue,is theoretically to receive the material that has chilled at the front of nozzle during the cooling and ejection of greater importance is the fact that it provides position means whereby the sprue bush for ejection purposes.The sprue,the runner and the gate will be discarded after a part is ,the runner and the gate are important items that affect the quality or the cost of parts.Ejection A molding is formed in mould by injecting a plastic melt,under pressure,into an impression via a feed must therefore be removed ,all thermoplastic materials contract as they solidify,which means that the molding will shrink on to the core which forms shrinkage makes the molding difficult to remove.Facilities are provided on the injection machine for automatic actuation of an ejector system,and this is situated behind the moving of this,the mould’s ejector system will be most effectively operated if placed in the moving half of the mould,. the half attached to the moving have stated previously that we need to eject the molding from the core and it therefore follows that the core,too,will most satisfactorily be located in the moving half.The ejector system in a mould will be discussed under three headings,namely：（?。﹖he ejector grid。 and（ⅲ）the method of ejection.、Ejector gridThe ejector grid（Figure51） is that part of the mould which supports the mould plate and provides a space into which the ejector plate assembly can be fitted and grid normally consists of a back plate on to which is mounted a number of conveniently shaped “support blocks”. The ejector plate assembly is that part of the mould to which the ejector element is assembly is contained in a pocket,formed by the ejector grid,directly behind the mould assembly（Figure52）consists of an ejector plate,a retaining plate and an ejector end of this latter member is threaded and it is screwed into the ejector this particular design the ejector rod function not only as an actuating member but also as a method of guiding the that the parallel portion of the ejector rod passes through an ejector rod bush fitted in the back plate of the mould.、Ejectio
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