Extruder screw

A technology of extruder and screw, which is applied in the field of machinery for processing solid resin materials, and can solve problems such as unguaranteed spinning quality and difficulty in melting in the metering section.

Inactive Publication Date: 2012-07-04
BEIJING CHONGLEE MACHINERY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an extruder screw, which solves the problem of using a common PET spinning screw when the solid resin material with high crystallinity and low spinning temperature is used as a raw material for melt spinning. After compression, heating and melting, there are still many particles that have not been converted into melt, and it is still difficult to completely melt in the metering section, so that the quality of subsequent spinning cannot be guaranteed.

Method used

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Embodiment Construction

[0015] The extruder screw provided by the embodiment of the present invention is used for melt spinning of high-density polyethylene, based on its melt index of 4, spinning temperature of 200°C to 250°C, and density of 0.94kg / m 3 to 0.96kg / m 3 , as well as the rheology, heat capacity and other properties of the material, a screw suitable for melt spinning polyethylene monofilament is designed.

[0016] see figure 1 and figure 2 , the extruder screw provided by the embodiment of the present invention, the main body of the screw structure includes a feed section 1 , a compression section 2 , a mixing section 3 and a metering section 4 . The feed section 1 is a constant root diameter; the compression section 2 is a gradual increase in the root diameter, and the screw channel gradually becomes shallow; the metering section 4 is a constant root diameter; the 3 root diameters of the mixing section vary with the At the same time, the mixing section 3 is moved from the conventiona...

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Abstract

The invention discloses an extruder screw. The extruder screw sequentially comprises a feeding section, a compression section, a mixing section and a metering section, wherein a flow dividing element is arranged on the surface of the mixing section; and the mixing section is positioned between the compression section and the metering section. By the extruder screw, the flow direction of a melted melt pushed through a spiral groove of the compression section is changed, the mixing probability of fluid is increased, a heat exchange effect of a solid phase and a liquid phase is improved, the unmelted solid agglomerate can be refined, melted and homogenized, subsequent spinning can be performed, and spinning quality can be ensured.

Description

technical field [0001] The invention relates to the field of machinery for processing solid resin materials, in particular to an extruder screw used for using thermoplastic solid resin with high crystallinity and low spinning temperature as raw material. Background technique [0002] The screw extruder is composed of a transmission system, a variable speed system, an extrusion system, a heating system, a frame system and a control system. When the nature of the work, the output and the characteristics of the whole machine are certain, the processing object is particularly important. For the spinning of polymers with different characteristics, the structural characteristics of the corresponding screws are also different, that is, the characteristics of the polymer will directly affect whether the spinning production of high polymers can run. Therefore, the screw structure design must be carried out under the premise of ensuring that the melt suitable for the spinning process...

Claims

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Application Information

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IPC IPC(8): D01D1/04
Inventor 那芝郁刘凯亮龙娇李秀宾刘鑫
Owner BEIJING CHONGLEE MACHINERY ENG
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