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18

2023

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09

聚氯乙烯雙壁波紋管的擠出成型用設備

聚氯(lv)乙烯雙(shuang)(shuang)壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)的(de)擠出(chu)成(cheng)型(xing)用設(she)備與(yu)單壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)擠出(chu)成(cheng)型(xing)用設(she)備基本(ben)相(xiang)似,不同之處只是(shi)管(guan)(guan)坯(pi)用成(cheng)型(xing)摸具(ju)(ju)。但是(shi),由(you)于雙(shuang)(shuang)壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)多(duo)是(shi)大口徑型(xing)規格,擠出(chu)成(cheng)型(xing)用原料較多(duo),所以建議應(ying)采用雙(shuang)(shuang)螺桿擠出(chu)機,這樣會(hui)比較好一點(dian)。   另外(wai),雙(shuang)(shuang)壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)的(de)管(guan)(guan)坯(pi)成(cheng)型(xing)模(mo)具(ju)(ju)結(jie)構與(yu)單壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)的(de)管(guan)(guan)坯(pi)成(cheng)型(xing)模(mo)具(ju)(ju)結(jie)不同之處是(shi):模(mo)具(ju)(ju)成(cheng)型(xing)管(guan)(guan)坯(pi)的(de)平(ping)直(zhi)段較長(chang);有(you)兩(liang)個熔(rong)(rong)料分流錐和(he)(he)兩(liang)層(ceng)(ceng)(ceng)熔(rong)(rong)料流道(dao)(dao)(dao)腔(qiang),這兩(liang)個熔(rong)(rong)料流道(dao)(dao)(dao)腔(qiang)內(nei)的(de)熔(rong)(rong)料分別成(cheng)型(xing)雙(shuang)(shuang)壁波(bo)(bo)(bo)(bo)紋(wen)(wen)管(guan)(guan)的(de)內(nei)外(wai)層(ceng)(ceng)(ceng)管(guan)(guan)壁;內(nei)外(wai)熔(rong)(rong)料流道(dao)(dao)(dao)腔(qiang)中間(jian)(jian)還有(you)一個壓(ya)縮(suo)空氣進(jin)入(ru)(ru)(ru)通(tong)道(dao)(dao)(dao),這里進(jin)入(ru)(ru)(ru)的(de)壓(ya)縮(suo)空氣吹脹(zhang)外(wai)層(ceng)(ceng)(ceng)管(guan)(guan)壁,使其(qi)貼緊波(bo)(bo)(bo)(bo)紋(wen)(wen)形(xing)模(mo)具(ju)(ju)而成(cheng)型(xing)管(guan)(guan)的(de)波(bo)(bo)(bo)(bo)紋(wen)(wen)形(xing);內(nei)層(ceng)(ceng)(ceng)芯(xin)棒的(de)中心(xin)孔(kong)(kong)能(neng)放置加熱器,還有(you)可通(tong)入(ru)(ru)(ru)壓(ya)縮(suo)空氣和(he)(he)冷卻水的(de)通(tong)孔(kong)(kong)。   而它們(men)兩(liang)模(mo)具(ju)(ju)結(jie)構的(de)相(xiang)同之處是(shi):熔(rong)(rong)料分流錐的(de)前面都(dou)應(ying)有(you)多(duo)孔(kong)(kong)板,管(guan)(guan)坯(pi)壁厚的(de)調整是(shi)通(tong)過調節(jie)分流錐和(he)(he)芯(xin)棒的(de)移(yi)動(dong)來調節(jie)芯(xin)棒與(yu)口模(mo)間(jian)(jian)的(de)間(jian)(jian)隙大小(xiao),而口模(mo)由(you)于伸(shen)入(ru)(ru)(ru)兩(liang)半波(bo)(bo)(bo)(bo)紋(wen)(wen)模(mo)之間(jian)(jian)則(ze)不能(neng)移(yi)動(dong)。


  聚氯乙烯雙壁波紋管的擠出成型用設備與單壁波紋管擠出成型用設備基本相似,不同之處只是管坯用成型摸具。但是,由于雙壁波紋管多是大口徑型規格,擠出成型用原料較多,所以建議應采用雙螺桿擠出機,這樣會比較好一點。
 
  另外,雙壁波紋管的管坯成型模具結構與單壁波紋管的管坯成型模具結不同之處是:模具成型管坯的平直段較長;有兩個熔料分流錐和兩層熔料流道腔,這兩個熔料流道腔內的熔料分別成型雙壁波紋管的內外層管壁;內外熔料流道腔中間還有一個壓縮空氣進入通道,這里進入的壓縮空氣吹脹外層管壁,使其貼緊波紋形模具而成型管的波紋形;內層芯棒的中心孔能放置加熱器,還有可通入壓縮空氣和冷卻水的通孔。
 
  而它們兩模具結構(gou)的(de)(de)相同之(zhi)處是(shi)(shi):熔料(liao)分流(liu)錐的(de)(de)前面都應有多孔(kong)板(ban),管坯壁厚的(de)(de)調(diao)(diao)整(zheng)是(shi)(shi)通過調(diao)(diao)節分流(liu)錐和芯(xin)棒的(de)(de)移動(dong)來調(diao)(diao)節芯(xin)棒與(yu)口模間(jian)的(de)(de)間(jian)隙大小(xiao),而口模由于伸(shen)入兩半波紋模之(zhi)間(jian)則不能移動(dong)。