成型工藝流程及條件介紹(注塑技術(shù)英語大全)(編輯修改稿)
2024-09-02 01:12 本頁面
【文章內(nèi)容簡介】 from nozzle to feeding resin material position. ,則射口筒溫度應(yīng)降低,. Nozzle temperature setting should low if product line. If resin material such as PPS, PA, cool very soon , Nozzle temperature should higher more than the second cylinder temperature. ,一般出于對機臺油路中的油封保護需要,油溫最好能控制在40度60度,以免油封長期高壓而變化,縮短使用壽命,造成成型不穩(wěn)定. Pump turning on temperature is different depending on type of injection molding machine. To protect oil seal of machine it set oil temperature within , If oil seal work on condition that high pressure and damaged It’s work time will be shorter, it can cause molding stable.第三節(jié)注射及熔膠(加料)工藝條件設(shè)定 Injection and plastic Technique parameter setting Injection 第四節(jié)常見塑料原料的有關(guān)溫度值. 原料 Resin名稱 Name熔點℃ Melt’s成型溫度℃ Molding Temperature(’c)分解溫度℃ Deposing Temperature(‘C)模具溫度℃ Mold Temperature(‘c)干燥溫度℃ Resin dry temperature(‘c) 注射是把塑料原料經(jīng)加熱后射進模腔的過程,它一般可分為第一級,第二級,第三級,第四級及保壓幾段: Injection is a step which inject melt resin material into mold. It consists of stepl,step2 ,step3,step4 and holding pressure step: ,當然也可以依據(jù)公式來計算,如公式: Step l injects usually tunnel material, Injection Volume can be estimated according to the weight of course it can be calculated by formula: L=Si=Vi/ L:注射行程。 Si:注射行程。 L: injection stroke Si: injection stroke Vi:理論注射容積。 Ds:螺桿直徑。 Vi: injection volume of theoretical Ds: diameter of screw :是Ω/4的值. 0. 785: value ofΩ/4. 當然,如果我們在成型時每設(shè)定一個參數(shù)都要計算一次,要成型出一個產(chǎn)品就要幾個小時才能完成了. But it cost a lot of time to produce one product if every time molding parameter is setting by calculation. ,當然,根據(jù)產(chǎn)品特殊需要,也允許成型不到2/3階段,比如避免結(jié)合線問題,這一階段的成型速度及壓力一般是整個成型段的最大值段,排氣良好,這一段的壓力一般也不會超過80%.速度側(cè)視產(chǎn)品需變,可能大到95%也可,自然一般都是在55%80%間. Step 2 inject 2/3 of product. It can lower 2/3 of product according to requirement of product. For example to prevent weld line. Molding speed and pressure on this step is the maximum of whole molding section. If Mold suit the injection molding machine and mold structure reasonable and eject air well, pressure of this step should lower 80%. Molding speed setting within 5580% but it may setting 95% for especial product. ,其速度和壓力根據(jù)產(chǎn)品的需要,一般是小于第二段,但同時又必須把產(chǎn)品充填飽滿. Step3 inject remain 1/3 of product. According to product molding speed and pressure lower than that of step2 To prevent flash speed and pressure should decrease but it can’t shot short. :一般有機臺還有第五,第六段,這段的成型速度和壓力相同前,.
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