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Stable flow regulator of screw extruder

A screw extruder, steady flow adjustment technology, applied in the field of screw extruder steady flow adjustment device, can solve the problem of unadjustable extrusion flow rate, etc., to reduce errors, reduce extrusion output fluctuations, increase flow Effect

Inactive Publication Date: 2004-07-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-sectional shape and size of the flow channel of the nozzle body are fixed, so the extrusion flow rate is not adjustable

Method used

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  • Stable flow regulator of screw extruder
  • Stable flow regulator of screw extruder
  • Stable flow regulator of screw extruder

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Experimental program
Comparison scheme
Effect test

Embodiment

[0020] like figure 2 , image 3 and Figure 4 As shown, the screw extruder steady flow regulating device of the present invention is composed of a die 1, a platen 2, a head body, a mandrel 4, a head connector 5, a transmission system and a measurement control system; the head body It is an assembly, and the machine head body is made up of machine head front body 3-1, machine head rear body 3-2 and adjustment block 3-3; -1A and the slideway 3-2A of the rear body of the machine head are dynamically matched, the middle section 3-3B of the inner surface of the adjustment block is a smooth surface (the same shape as the corresponding position of the ordinary extrusion head), and the outer surface of the adjustment block 3-3C is in line with the machine head The front inner surface 3-1B is in motion fit, the lead screw 6 is threadedly connected with the adjustment block 3-3, one end of the lead screw 6 has a step 6-1 to be positioned with the connecting body 5 of the machine head...

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PUM

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Abstract

The flow-stabilizing regulator of screw extruder consists of one machine head comprising mouth mold, pressing board, head, mandrel and head connector; transmission system and measurement and control system. The head assembly consists of front head, back head and regulating block; the regulating block has two sections of its inner surface fitting movably with front head slideway and back head slideway separately and its outer surface fitting movably with the inner surface of the front head; and the lead screw is screwed to the regulating block. The measurement and control system has its output signal controlling the rotation speed of the servo motor, and the servo motor rotates the lead screw via the transmission system and thus drives the regulating block to reciprocate axially inside the front head slideway and the back head slideway. The flow-stabilizing regulator may be used in single- and double-screw extruder, and has raised extruded product precision.

Description

technical field [0001] The invention is an improvement to the head of the existing screw extruder, can be matched with single and twin screw extruders, and can improve the precision of extruded products through steady flow regulation. Background technique [0002] The screw extruder and machine head direct-connected production line used for extrusion processing of polymer materials, because the screw of the extruder not only plays the role of melting the mixed material, but also plays the role of building pressure, during the extrusion process Due to the influence of many factors such as the nature of the material, feeding fluctuations, the proportion of recycled materials, and changes in operating process conditions, the pressure of the melt flowing out of the perforated plate of the extruder fluctuates greatly, which causes the extrusion output to fluctuate. Fluctuations cause errors in the dimensions of each cross-section of the product along the extrusion direction, affe...

Claims

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Application Information

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IPC IPC(8): B29C48/325
Inventor 吴大鸣陈卫红丁玉梅许红刘颖汪冯新
Owner BEIJING UNIV OF CHEM TECH