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Extruder screw

A screw and screw technology, applied in the field of extruders, can solve the problems that need to be further improved, and achieve the effect of maximizing torque, ensuring strength and improving efficiency

Pending Publication Date: 2020-09-18
NANJING KY CHEM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing extruder screws still need to be further improved in terms of extrusion efficiency; in view of the deficiencies in the prior art, there is a need for an extruder screw that can improve the extrusion efficiency of the screw

Method used

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Embodiment Construction

[0022] see Figure 1 to Figure 4 , an extruder screw, comprising a screw 1, the cross section of the screw 1 is oval; The central point is coincident, and the diameter of the spiral fin 2 is the same as the major diameter Do of the ellipse; the ratio of the major diameter Do of the ellipse to the minor diameter Di of the ellipse is 1.5 to 1.7; the screw rod 1 is Hollow structure, the screw 1 is provided with an internal spline 3, the pressure angle of the internal spline 3 is 25 to 35 degrees; and the screw 1 is provided with a spline shaft 4 matching the internal spline 3 for driving the screw 1 rotation. By controlling the ratio of the large diameter Do to the small diameter Di and the pressure angle of the screw, the diameter-volume ratio and torque of the screw extrusion can be maximized, thereby improving the extrusion efficiency and ensuring the strength of the internal spline; the spiral fin 2. The screw 1 and the internal spline 3 are integrally formed; the ratio of ...

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Abstract

The invention provides an extruder screw rod, and particularly relates to the field of extruders. The extruder screw rod comprises a screw rod body, wherein the cross section of the screw rod body iselliptical, a spiral fin is arranged outside the screw rod body, the center point of the spiral fin coincides with the center point of the ellipse, and the diameter of the spiral fin is the same as the major diameter Do of the ellipse; the ratio of the major diameter Do of the ellipse to the minor diameter Di of the v is 1.5 to 1.7; the screw rod body is of a hollow structure, an internal spline is arranged in the screw rod body, and the pressure angle of the internal spline is 25-35 degrees; and a spline shaft matched with the internal spline is arranged in the screw rod. The extrusion efficiency of the screw rod can be improved.

Description

technical field [0001] The invention belongs to the field of extruders, in particular to an extruder screw. Background technique [0002] The screw extruder relies on the pressure and shear force generated by the rotation of the screw, so that the material can be fully plasticized and evenly mixed, and then formed through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and rare multi-screw extruders and non-screw extruders. Existing extruder screws still need to be further improved in terms of extrusion efficiency; in view of the deficiencies in the prior art, there is now a need for an extruder screw that can improve the extrusion efficiency of the screw. Contents of the invention [0003] The purpose of the present invention is to provide an extruder screw, which can improve the extrusion efficiency of the screw. [0004] The present invention provides following technical scheme: [0005] A kind of extruder scr...

Claims

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Application Information

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IPC IPC(8): B29C48/505
CPCB29C48/2564B29C48/505
Inventor 刘光知杜珲
Owner NANJING KY CHEM MASCH CO LTD
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