湖南pph管的成型工藝介紹
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pph管是對一般PP料開展β改性材料,使其具備勻稱細致的Beta晶體結構構造,具備很好的耐溶劑腐蝕,抗磨損,介電強度好,耐熱,操作溫度可做到100℃,不含毒性,品質輕,以便運送與安裝,它是一種比亞洲婷婷國產精品電影人久久:湖南PP管耐熱、耐腐蝕、耐老化的高品質量商品。

pph管的擠壓成形加工工藝以(yi)下:
1、原(yuan)材料(liao)的挑選:阻燃(ran)塑料(liao)聚(ju)丙(bing)稀(xi)管件用環氧(yang)樹脂(zhi),其溶(rong)體流動性(xing)(xing)速度(du)在0.2~0.4g/10min范(fan)疇內。一般溶(rong)體流動性(xing)(xing)速度(du)在0.2~0.4g/10min范(fan)疇內的環氧(yang)樹脂(zhi)運用較多。
2、聚(ju)丙烯管(guan)生(sheng)產工藝流程次序(xu):與通用性聚(ju)乙烯給水(shui)管(guan)的(de)生(sheng)產工藝流程次序(xu)同樣,加工工藝次序(xu)以下。原材(cai)料(liao)開袋查(cha)驗品質→擠(ji)塑機把原材(cai)料(liao)熔融熔化→模貝(bei)成(cheng)形(xing)管(guan)料(liao)→真空(kong)泵(beng)口模套制(zhi)冷口模→真空(kong)泵(beng)自噴(pen)制(zhi)冷→管(guan)件制(zhi)冷減溫→牽引帶(dai)→激光(guang)切(qie)割→檢(jian)測品質→進庫。
3、機器設備的挑選(xuan):聚丙稀管件多選(xuan)用(yong)通用(yong)性單(dan)單(dan)螺(luo)桿擠(ji)出機生產制造成形。
擠出機(ji)螺桿構造為等牙距(ju)不一深漸(jian)變色型,高徑(jing)(jing)為(25~30):1,發動機(ji)壓縮比為2.5~4。成形模(mo)具設計多見直(zhi)(zhi)(zhi)連式,芯(xin)軸定形豎直(zhi)(zhi)(zhi)一部(bu)分長(chang)L=(2~5)D(D為管件(jian)的直(zhi)(zhi)(zhi)徑(jing)(jing),直(zhi)(zhi)(zhi)徑(jing)(jing)鐘頭取最大值(zhi),管件(jian)直(zhi)(zhi)(zhi)徑(jing)(jing)大時取小(xiao)值(zhi))。口模(mo)套的內徑(jing)(jing)d=D/(1-δ)(D為管件(jian)直(zhi)(zhi)(zhi)徑(jing)(jing),δ為管件(jian)縮水(shui)率,一般(ban)δ=2.7%~4.7%)。
4、管件擠壓成形加(jia)工(gong)工(gong)藝(yi)溫(wen)度(du)(du):料筒(tong)的投料段150~165℃,熔融段170~180℃,均化段190~220℃。成形模貝溫(wen)度(du)(du)190~220℃。
5、PPH等塑料(liao)管道在生產過程有時候會發生塑膠(jiao)化(hua)欠佳、脆化(hua)。
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