XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects
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XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects
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XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects
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XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects
XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects

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The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects

  1. 长径比:通常选择较大的长径比,一般在 30 到 36 之间。较长的长径比可以提供更充分的塑化和混合时间,使材料在高速挤出过程中均匀塑化,从而保证管材的质量。
  2. 螺杆槽深度:螺杆槽深度需要根据管道输出量和物料特性进行设计。一般来说,对于高速挤出机,螺杆槽深度相对较浅,以提高物料输送能力并减少物料在螺杆槽内的停留时间。较浅的螺杆槽可以使物料在螺杆旋转过程中更快地向前推进,从而提高挤出速度。
  3. 压缩比:压缩比一般在3到5之间。合适的压缩比有助于压实材料,去除材料中的空气,并提高材料的密度和塑化性能。对于高速挤出,压缩比的设计应考虑到材料能够在短时间内完成压缩和塑化过程。
  4. 螺距:较大的螺距设计有利于提高物料的输送速度,减少物料在螺杆上的滑移,从而实现高速挤出。通常采用等螺距变深或变螺距变深螺距设计,并根据物料特性和螺杆不同截面的加工要求进行优化。
  5. 螺杆头部结构:螺杆头部通常设计成流线型,例如鱼雷头形状,以减少头部材料的滞留和堆积,避免材料过热或分解。这种结构还可以使材料在挤压过程中分布更均匀,从而提高管材质量。
  6. 材料选择:由于螺杆在高速挤压过程中承受着高压和摩擦,因此需要选择高强度、耐磨性和耐腐蚀性强的材料,如38CrMoAlA氮化钢,以确保螺杆的使用寿命和稳定性。
  7. 冷却和润滑:为防止螺杆高速旋转过程中因摩擦生热导致物料过热,需要设计良好的冷却系统。通常,在螺杆内部设置冷却通道,并通入冷却水进行冷却。同时,合理的润滑措施也有助于减少螺杆与料筒之间的摩擦,提高传动效率。
XINLU ,Screw and barrel,Injection machine,screw barrel factory | The main design points of the barrel screw for high-speed extrusion pipe extruders include the following aspects