塑料的流動性也因各成型因素而變，主要影響的因素哪幾點？

各(ge)(ge)種塑料(liao)的流(liu)動(dong)性(xing)也因各(ge)(ge)成型(xing)因素而變(bian)，主(zhu)要影響的因素有如下幾(ji)點: ①溫(wen)(wen)度(du)(du)料(liao)溫(wen)(wen)高則(ze)流(liu)動(dong)性(xing)增大，但不同(tong)塑料(liao)也各(ge)(ge)有差異，PS (尤其(qi)耐沖擊型(xing)及MFR值(zhi)較(jiao)高的)、PP、PA、PIOMA、改性(xing)聚苯(ben)乙烯(xi)(如ABS、AS)、 PC、CA等塑料(liao)的流(liu)動(dong)性(xing)隨溫(wen)(wen)度(du)(du)變(bian)化較(jiao)大。對PE、POM、則(ze)溫(wen)(wen)度(du)(du)增減對其(qi)流(liu)動(dong)性(xing)影響較(jiao)小。所(suo)

模具加工工藝規程和精加工工藝

模具加(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝(yi)規程的(de)(de)(de)內容要(yao)求(qiu)1）模具或零件(jian)的(de)(de)(de)名稱、圖號、材(cai)料、加(jia)工(gong)(gong)(gong)(gong)數量(liang)(liang)和技術要(yao)求(qiu)等(deng)標題欄；2）毛坯尺(chi)寸和供(gong)貨狀(zhuang)態；3）工(gong)(gong)(gong)(gong)藝(yi)定(ding)位基準(zhun)；4）成型件(jian)的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)方(fang)法(fa)和順序；確定(ding)各(ge)(ge)工(gong)(gong)(gong)(gong)序的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)余量(liang)(liang)、工(gong)(gong)(gong)(gong)序尺(chi)寸和公差要(yao)求(qiu)以及工(gong)(gong)(gong)(gong)裝(zhuang)、設備的(de)(de)(de)配(pei)(pei)置；5）各(ge)(ge)工(gong)(gong)(gong)(gong)序的(de)(de)(de)工(gong)(gong)(gong)(gong)時定(ding)額；6）確定(ding)裝(zhuang)配(pei)(pei)基準(zhun)裝(zhuang)配(pei)(pei)順序、方(fang)法(fa)和要(yao)求(qiu)；7）確定(ding)試模要(yao)求(qiu)和驗收標準(zhun)。

塑料產品填充不足的原因分類

一、產品設計(ji):產品的(de)厚(hou)度(du)與長(chang)度(du)不(bu)成比列，材料(liao)無法流動到產品的(de)末端，形狀(zhuang)結構復雜，筋(jin)位多、深(shen)，都(dou)會造(zao)成注(zhu)(zhu)射壓力(li)損失大及容易困(kun)氣；二、原材料(liao)：材料(liao)流動性差，冷料(liao)雜質阻塞流道(dao)，三、注(zhu)(zhu)塑模具：澆注(zhu)(zhu)系統設計(ji)不(bu)合(he)理；模具排氣不(bu)良，模具溫(wen)度(du)太(tai)低，四(si)、注(zhu)(zhu)塑工(gong)藝：熔料(liao)的(de)溫(wen)度(du)太(tai)低，噴嘴(zui)的(de)溫(wen)度(du)太(tai)低，注(zhu)(zhu)射壓力(li)或保壓壓力(li)不(bu)足，