模具設(shè)計外文翻譯--注塑成型-模具設(shè)計(完整版)
【正文】 gh hopper neck began 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。選擇國產(chǎn)設(shè)備，以較小的投入，同樣也能生產(chǎn)出與進口設(shè)備質(zhì)量相當?shù)漠a(chǎn)品。在溶化的過程期間，料筒的外部附有電熱絲以協(xié)助熱化和溫度控制。冷卻水道，協(xié)助冷卻模具和塑料加熱固化。因為推出系統(tǒng)的移動在定模上，所以要盡量避免這種情況。在這一部分，螺紋深度不斷地減少，壓縮熔料。在冷卻周期后部分，澆口已經(jīng)凝固，塑化發(fā)生。材料通過澆口套進入模具，之后流道系統(tǒng)將材料傳遞到澆口。由于柱塞向前運動，溶化 塑料壓迫通過正對著模具的噴嘴 、澆口和熱道系統(tǒng)進入型腔。當這標準都達到了，注射周期伴隨著模具的閉合開始。 當零件差不多充滿型腔時，注射控制從速率控制轉(zhuǎn)向壓力控制，稱為保壓周期。料斗頸部必須保持冷卻以防止因為料筒太熱而導(dǎo)致塑料顆粒熔在一起。當注射螺桿倒退以便形成注射，止會裝置引導(dǎo)材料流到螺桿 的前面行成一熔料池或注射。如果不放慢機器速度就不能準確定位，產(chǎn)生的沖擊可能損壞機器。 樹脂或者注坯模型的原材料，通常以藥丸或粒子形式被提供。澆口和流道系統(tǒng)能夠被剪斷、扭斷和重復(fù)利用，有時在線條機構(gòu)旁邊被顆?；?。 塑料注射成型技 術(shù)是根據(jù)壓鑄原理從十九世紀末二十世紀初發(fā)展起來的，是目前塑料加工中最普遍采用的方法之一。s relevant d
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