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A grooved barrel extruder

An extruder and barrel technology, applied in the field of grooved barrel extruders, can solve the problems of high energy consumption, low melting and plasticizing efficiency, etc., and achieve low energy consumption, improve melting efficiency, and high-speed and efficient extrusion. Effect

Active Publication Date: 2016-05-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a grooved barrel extruder, which effectively solves the technical defects of the traditional smooth barrel single-screw extruder such as low melting and plasticizing efficiency and high energy consumption.

Method used

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  • A grooved barrel extruder
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  • A grooved barrel extruder

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0024] The first embodiment: the outer surface of the screw and the inner surface of the barrel bushing are both cylindrical, the diameter of the screw is D=90mm, the lead is 90mm, the number of threads is 1, the aspect ratio is 30, right-handed, and the main flight The width is 7.2mm, the groove depth of the solid conveying section is 5.0mm, and the length is 7.5D. The groove depth of the melt conveying section is 13.9mm, and the length is 17.5D. At the end of the section, there is a secondary thread, the width of the secondary thread is 5.4mm, the width of the separated solid-phase screw groove is 46.0mm, the depth of the solid-phase screw groove is reduced from 6.0mm to 0mm, and the width of the liquid-phase screw groove is 22.4mm. The groove depth is increased from 20.2mm to 30.0mm; the inner diameter of the barrel bushing is 90.5mm, the number of grooves is 12, left-handed, the groove thread rise angle is 51.8°, and the groove depth at the initial end of the solid conveying ...

no. 2 example

[0027] The second embodiment: the outer surface of the example screw and the inner surface of the barrel bushing are both cylindrical, the diameter of the screw is D=90mm, the lead is 90mm, the number of threads is 1, the aspect ratio is 25, right-handed, solid conveying The depth of the section screw groove is 6.0mm, and the length is 8D; the depth of the screw groove in the melt conveying section is 15.3mm, and the length is 7D; the melting section is a separate screw, and the length is 10D; the end of the solid conveying section has a secondary thread, and the width of the secondary thread is 7.2 mm, the depth of the separated solid-phase screw groove is 6.0mm, and the depth of the liquid-phase screw groove is 15.3mm; the inner diameter of the barrel bushing is 90.5mm, the number of grooves is 10, left-handed, and the lead angle of the groove is 46.7°, the groove depth of the solid conveying section of the barrel bush groove is 5.0mm, the initial groove depth of the barrel b...

no. 3 example

[0030] The third embodiment: the outer surface of the example screw and the inner surface of the barrel bushing are both cone-shaped, the diameter of the large end of the screw is D=90mm, the diameter of the small end is 60mm, the lead is 90mm, the number of thread starts is 2, and the long diameter The ratio is 20, right-handed, the solid conveying section has a screw groove depth of 6mm and a length of 5.8D; the melting section is a separate screw with a length of 8.2D and a secondary thread width of 5.0mm, and the solid phase screw groove depth is reduced from 6mm to 0mm , The depth of the liquid-phase screw groove gradually increases from 15.1mm to 23.5mm; the depth of the screw groove in the melt conveying section is 12mm, and the length is 6D. The diameter of the large end of the barrel bushing is 91mm, the diameter of the small end is 60.3mm, the number of grooves is 12, left-handed, the groove thread rise angle is 50°, and the groove depth of the initial end of the soli...

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Abstract

A grooved barrel extruder, the inner surface of the barrel liner (10) and the outer surface of the screw (13) are both cylindrical or conical; the volume of the barrel liner groove (11) is extruded along the The direction gradually decreases; the screw (13) is a separation type screw, the volume of the screw solid-phase channel (16) gradually decreases along the extrusion direction, and the volume of the screw liquid-phase channel (12) gradually increases along the extrusion direction; When the screw (13) rotates, the material in the barrel bushing groove (11) and the material in the screw solid-phase channel (16) always maintain friction between solid phases, and interface melting occurs at the screw melting section (21), and the molten The material is continuously dragged into the screw liquid-phase channel (12), the solid-phase material in the screw solid-phase channel (16) and the barrel liner groove (11) decreases, and the molten material in the screw liquid-phase channel (12) increases ; The completely melted material is re-collected to the screw groove (18) of the melting section of the screw, and the material is stably transported through the melt conveying section.

Description

technical field [0001] The invention is a grooved barrel extruder, which can realize high-speed and high-efficiency melting of materials, obtain higher extrusion output, and realize high-speed and high-efficiency extrusion of plastic products such as pipes, sheets, and special-shaped materials. Background technique [0002] In a traditional smooth barrel single-screw extruder, the heat source for melting is the external heat source of the barrel and the external friction heat between the material and the inner surface of the barrel. Under the combined action of the two, the material at the inner surface of the barrel first melts , to produce a molten film, as the melting progresses, the main flight surface of the screw scrapes off the molten film so that the molten material gathers at the flight surface to form a molten pool, and gradually melts the solid phase in the screw channel, and the material melts mainly Occurs in the axial direction of the screw. The disadvantages ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/38B29C47/60B29C47/66B29C48/395B29C48/525B29C48/64
CPCB29C48/397B29C48/686B29C48/56B29C48/53B29C48/54B29C48/64B29C48/688B29C48/525Y02P70/10
Inventor 薛平贾明印金晓明
Owner BEIJING UNIV OF CHEM TECH
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