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pph管的擠壓成形加工工藝(yi)以下：

1、原(yuan)材料的(de)挑選：阻燃(ran)塑料聚丙稀管件用環氧樹脂(zhi)，其溶體(ti)流(liu)動性(xing)速度(du)在0.2～0.4g/10min范疇內(nei)。一般溶體(ti)流(liu)動性(xing)速度(du)在0.2～0.4g/10min范疇內(nei)的(de)環氧樹脂(zhi)運用較多。

2、聚丙烯管(guan)(guan)(guan)(guan)生產(chan)(chan)工(gong)(gong)藝(yi)流程次(ci)序(xu)：與通用性聚乙烯給水管(guan)(guan)(guan)(guan)的生產(chan)(chan)工(gong)(gong)藝(yi)流程次(ci)序(xu)同樣(yang)，加(jia)工(gong)(gong)工(gong)(gong)藝(yi)次(ci)序(xu)以下。原(yuan)(yuan)材(cai)料開袋查驗(yan)品質→擠(ji)塑機把(ba)原(yuan)(yuan)材(cai)料熔(rong)融熔(rong)化→模貝(bei)成形管(guan)(guan)(guan)(guan)料→真空(kong)泵(beng)口(kou)模套(tao)制(zhi)冷(leng)口(kou)模→真空(kong)泵(beng)自噴制(zhi)冷(leng)→管(guan)(guan)(guan)(guan)件制(zhi)冷(leng)減(jian)溫→牽引(yin)帶(dai)→激(ji)光切(qie)割→檢(jian)測品質→進(jin)庫。

3、機(ji)器設備(bei)的挑選(xuan)(xuan)：聚丙稀(xi)管件多(duo)選(xuan)(xuan)用通用性單單螺桿擠出機(ji)生(sheng)產制(zhi)造(zao)成形。

擠(ji)出機螺桿構造為(wei)(wei)等牙(ya)距不一(yi)深漸變色(se)型，高徑為(wei)(wei)(25～30)：1，發(fa)動機壓(ya)縮(suo)比為(wei)(wei)2.5～4。成形模(mo)具設(she)計多見直(zhi)(zhi)連式，芯軸定形豎直(zhi)(zhi)一(yi)部分長L=(2～5)D(D為(wei)(wei)管件(jian)(jian)的直(zhi)(zhi)徑，直(zhi)(zhi)徑鐘(zhong)頭取(qu)最(zui)大值(zhi)，管件(jian)(jian)直(zhi)(zhi)徑大時取(qu)小值(zhi))。口模(mo)套的內徑d=D/(1-δ)(D為(wei)(wei)管件(jian)(jian)直(zhi)(zhi)徑，δ為(wei)(wei)管件(jian)(jian)縮(suo)水率，一(yi)般(ban)δ=2.7%～4.7%)。

4、管件擠壓成形加工工藝溫度(du)：料筒的(de)投(tou)料段150～165℃，熔融段170～180℃，均化段190～220℃。成形模貝溫度(du)190～220℃。

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