模具設(shè)計(jì)外文翻譯--注塑成型-模具設(shè)計(jì)(編輯修改稿)
2025-02-24 05:41 本頁面
【文章內(nèi)容簡(jiǎn)介】 egan to enter a nitrogentreated barrel. Hopper neck must keep cooling to prevent because nitrogentreated barrel too hot to plastic particles melt together. Contains a nitrogentreated barrel for shear molten material screw, it consists of three parts. The first part is inflows part, which promotes plastic ball forward movement and requirements for stove temperature high make plastic pellets softened. Threaded uniform depth and the deepest in this part. The next part of the rotational part, is responsible for this part of molten material by shear. In this part, threaded depth constantly decrease, pression cladding material. Last part is measurement profile, this part of the threaded depth shallow, improve the quality of the melt and color of the distribution. In the screw front are able to let screw as extruder and piston check valves. When injected screw retrograde injection, stop order to form will guide material flow to the device of the screw front line to bee a molten material pool or injection. The injection, check device to prevent injection flow back to screw parts. When injected began to establish and cooling time end, mould open. Mould open must abide by the slow fast slow. Molds must slowly opened to release the injection produces in the process of vacuum to prevent parts stay in fixed modules. Because of mobile launch system in fixed mode, so try to avoid this kind of circumstance. Then quickly open mold, if not using machine hand, mould only need to open enough to remove the parts distance. End must slow down to pensate mould impulse. If you don39。t slow down machine speed cannot accurate positioning, impact may damage the machine. When the mould opened, putting forward movement, promote the parts. When putting back, all molding cycle standards are reaching, then next shape cycle can begin. Basic injection cycle as follows: shut the mould injection plastic injection device that moves back determination transport cavity introducing parts. Some machines is from motor instead of hydraulic press or both. The cooling channels, assist cooling mould and plastic heat cure. Cooli
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