貴州塑料桶生產商制造前對成型原料開展的預備處理包含剖析檢測成型原料的品質和加熱干躁。①剖析檢測成型原料的品質依據打針成型對原料的加工工藝特點規定檢測原料的水分含量、顏色、粒度及精密度、有結晶狀并檢測其耐熱性、流通性和縮水率等指標值。假如檢測中出現難題應立即采取有效加以解決。②加熱干躁：對吸水性強的塑料如滌綸、聚碳酸、ABS等，成型前要依據成型加工工藝容許的含水溶性規定開展充足的加熱干躁去除原材料中過多的水份和揮發性有機物以避免成型后塑料件出現汽泡和絲條等缺點，另外還可以防止打針時產生水溶解。

打(da)針成型制(zhi)造中，塑料桶生產商(shang)以便使塑料制(zhi)品(pin)非常容易(yi)從(cong)磨具(ju)內滑脫(tuo)，有(you)的(de)磨具(ju)凹模(mo)或磨具(ju)型芯還(huan)需(xu)涂上(shang)脫(tuo)膜(mo)劑，常見的(de)脫(tuo)膜(mo)劑有(you)硬(ying)脂(zhi)酸鋅、液體(ti)石蠟和甲基硅油等。針對帶有(you)硫化(hua)橡膠的(de)軟工藝(yi)品(pin)或全透明(ming)工藝(yi)品(pin)不(bu)適合應用脫(tuo)膜(mo)劑，不(bu)然(ran)將危(wei)害工藝(yi)品(pin)的(de)清晰度。

一(yi)般(ban)，柱(zhu)塞泵(beng)式注射(she)機(ji)料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)大務必將料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)拆裝漬(zi)洗。針對(dui)螺(luo)杄式料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)，可(ke)選(xuan)用(yong)對(dui)空注射(she)法清(qing)(qing)理。選(xuan)用(yong)對(dui)空注射(she)法清(qing)(qing)理螺(luo)杄式料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)時，若欲(yu)(yu)(yu)(yu)拆換(huan)(huan)的塑(su)(su)料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)小于料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)內(nei)殘料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)時要將料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)和噴(pen)頭溫(wen)(wen)度(du)上升(sheng)到欲(yu)(yu)(yu)(yu)換(huan)(huan)塑(su)(su)料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)，斷開(kai)開(kai)關電(dian)源(yuan)添(tian)加欲(yu)(yu)(yu)(yu)換(huan)(huan)塑(su)(su)料(liao)(liao)(liao)(liao)(liao)的再生料(liao)(liao)(liao)(liao)(liao)，并持續(xu)對(dui)空打(da)(da)針直至(zhi)(zhi)將所有殘料(liao)(liao)(liao)(liao)(liao)清(qing)(qing)除才行；若塑(su)(su)料(liao)(liao)(liao)(liao)(liao)桶生產商拆換(huan)(huan)的塑(su)(su)料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)高(gao)過(guo)料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)內(nei)殘料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)時，應將料(liao)(liao)(liao)(liao)(liao)筒(tong)(tong)(tong)和噴(pen)頭溫(wen)(wen)度(du)升(sheng)髙(gao)到欲(yu)(yu)(yu)(yu)換(huan)(huan)塑(su)(su)料(liao)(liao)(liao)(liao)(liao)的成(cheng)型(xing)(xing)溫(wen)(wen)度(du)隨后添(tian)加欲(yu)(yu)(yu)(yu)換(huan)(huan)塑(su)(su)料(liao)(liao)(liao)(liao)(liao)或其再生料(liao)(liao)(liao)(liao)(liao)并持續(xu)對(dui)空打(da)(da)針，直至(zhi)(zhi)將所有殘料(liao)(liao)(liao)(liao)(liao)清(qing)(qing)除才行。

若塑(su)料(liao)桶生產商(shang)的二種塑(su)料(liao)成型溫(wen)度(du)(du)相距并不大時，無(wu)須變動溫(wen)度(du)(du)，先加再(zai)生料(liao)隨后用欲換塑(su)料(liao)對空打(da)針(zhen)就可以。殘料(liao)屬熱敏性塑(su)料(liao)時，需(xu)從流通性好、耐熱性好的高壓聚(ju)乙(yi)烯(xi)、聚(ju)乙(yi)烯(xi)等塑(su)料(liao)中挑選粘度(du)(du)較(jiao)髙的等級(ji)做為銜接料(liao)對空打(da)針(zhen)。

針對有嵌件(jian)的塑(su)(su)料(liao)(liao)(liao)制(zhi)品，因為金屬材料(liao)(liao)(liao)與(yu)塑(su)(su)料(liao)(liao)(liao)的縮水(shui)率不(bu)一樣(yang)，嵌件(jian)周邊的塑(su)(su)料(liao)(liao)(liao)非常容易出現(xian)收攏(long)地應(ying)力和裂痕因而，成(cheng)型(xing)前對嵌件(jian)開展加(jia)熱，減少它在成(cheng)型(xing)時(shi)與(yu)塑(su)(su)料(liao)(liao)(liao)溶體(ti)的溫度(du)差，防止或抑止嵌件(jian)周邊的塑(su)(su)料(liao)(liao)(liao)出現(xian)的收攏(long)地應(ying)力和裂痕。在嵌件(jian)較鐘頭(tou)對分子結構(gou)鏈(lian)順滑(hua)性大的塑(su)(su)料(liao)(liao)(liao)還可以不(bu)加(jia)熱。