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　　PE雙壁波紋管在實際生產過程中，會遇到擴口不良的問題，下面我們將具體分析。

　　PE double-wall bellows in the actual production process, will encounter the problem of poor expansion, below we will analyze in detail.

　　(1)內層吹破原因一般有內層空氣壓力過大;原材料韌性差;內層太薄;所述擴口排氣口啟動較晚或所述擴口排氣管不暢通;原料中含有雜質;材料塑化不良等。

　　(1) The causes of inner blowing are generally excessive air pressure in the inner layer, poor toughness of raw materials, too thin inner layer, late start-up of the flared exhaust port or blockage of the flared exhaust pipe, impurities in raw materials, poor plasticization of materials, etc.

　　(2)火焰內外層附著不好。如果這一現象在開始時發生，則是因為內部空氣鼓風啟動較晚或相應的截面壓力過小;如果發生在端部，則是由于內部推力的過早端或燃燒和排氣的過早端，或由于相應部位的壓力太小。如果從頭到尾膠合不好，可能是由于原材料的性能或溫度問題。

　　(2) The inner and outer layers of the flame do not adhere well. If this phenomenon occurs at the beginning, it is because the internal air blast starts late or the corresponding cross-section pressure is too small; if it occurs at the end, it is because the internal thrust is too early or the combustion and exhaust is too early, or because the pressure at the corresponding part is too small. If the cementing is not good from beginning to end, it may be due to the performance or temperature of raw materials.

　　(3)端面擴口不完全，無論如何調整擴口都不能卡住，原因一般是內部空氣沖到一個較早的端面;擴口和排氣提前結束。

　　(3) The end-face enlargement is incomplete and can not be jammed by adjusting the enlargement in any case. The reason is that the internal air rushes to an earlier end-face; the end of the enlargement and exhaust is ahead of schedule.

HDPE雙平壁鋼塑復合纏繞管

　　(4)前端的內腔有凹進去的現象，造成這種現象的原因一般是內部空氣起動過早;水套中線偏離模型模塊中線(成型機與水套位置不相同);內壁薄;內部真空過早地停止。

　　(4) There is a concave phenomenon in the inner cavity of the front end, which is generally caused by the premature start of internal air; the deviation of the middle line of the water jacket from the middle line of the model module (the position of the forming machine is different from that of the water jacket); the thin inner wall; and the premature stop of the internal vacuum.

　　(5)火焰端內層堆積，這種現象往往導致火焰進入凹形。其原因是擴口端內層過厚。注塑機在此段減速量過大;前幾段內推力過大;內層材料溫度太高，毛坯太軟。這部分外毛坯太厚了。

　　(5) The inner layer of the flame end accumulates, which often causes the flame to enter concave shape. The reason is that the inner layer of the expanding end is too thick. In this section, the deceleration of the injection moulding machine is too large; in the first few sections, the thrust is too large; the temperature of the inner material is too high, and the blank is too soft. This part of the outer blank is too thick.

　　6. 擴口的內層末端有凹形，其原因一般是擴口后波和第二波壓力過小;波和第二波的內壁厚度過厚。內真空度小或內真空度啟動太晚;原材料的韌性較差。

　　6. There is concave shape at the inner end of the enlargement. The reason is that the pressure of the first wave and the second wave after the enlargement is too small, and the thickness of the inner wall of the first wave and the second wave is too thick. The internal vacuum is small or the internal vacuum starts too late; the toughness of raw materials is poor.