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Equipment for mixing and extruding plastic materials

A technology of plastic materials, equipment, applied in the field of mixer-extruder

Active Publication Date: 2022-07-01
COLMEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these prior art systems are able to control the pressure and temperature conditions of the materials to be compounded during processing so that the pressure and temperature conditions are suitable for both compounding and extrusion conditions

Method used

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  • Equipment for mixing and extruding plastic materials
  • Equipment for mixing and extruding plastic materials
  • Equipment for mixing and extruding plastic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Extrusion and mixing machines include figure 1 The basic elements are shown and have been described in the introductory part by reference to WO2005 / 039847, which is incorporated herein by reference.

[0030] Notably, the "dump extruder" machine has a machine body defining a compounding chamber 1 that houses a pair of conical extrusion screws 2 arranged with intersecting The helical blade spirals and converges towards the extrusion die 3 shaft.

[0031] The extrusion die 3 can be closed by a suitable closing device 4 (illustrated schematically in the figures), such as a removable cover, or simply by an extraction gear pump, which is stopped and closes the outlet of the die .

[0032] The compounding chamber 1 has an upper inlet 1a from which the material to be processed, such as a rubber-based or silicone-based material, is introduced.

[0033] In the front of the chamber 1, near the extrusion die 3, a pair of conical screws 2 are housed in converging conical channels...

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PUM

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Abstract

An apparatus for extruding and mixing plastic materials, such as rubber-based and silicone-based materials, comprising a self-unloading extruder body in which two cones converging towards an extrusion die (3) are mounted screw (2), the extrusion die (3) adapted to be closed by closing means (4), the conical screw (2) is housed in the low pressure compounding chamber (1) and in a pair of converging conical channels A high pressure chamber (2') is also defined, said low pressure chamber (1) corresponding to the upstream area with respect to the extrusion direction, wherein said high pressure chamber (2') and / or said low pressure chamber (1) ) houses a pressurizer body (5, 5', 6) which defines a movable wall adapted to cause the respective chambers (1, 2') Controlled change in volume.

Description

technical field [0001] The present invention relates to mixer-extruders for rubber, silicone, plastic and thermoplastic or other materials, and more particularly to mixer-extruders provided with means for temporarily conditioning the compounding chamber. Background technique [0002] It is well known that in some types of screw extruders for synthetic materials (especially materials with a good degree of elasticity, such as rubber, elastomers, plastics and / or thermoplastics or silicones), by opening upwards The loading hopper performs the feeding to the extrusion screw. [0003] A commercially available extruder that has proven to be particularly effective is the extruder described in WO 2005 / 039847 in the name of the same applicant, incorporated herein by reference, in which a twin screw dump extruder is used. Compounding functionality is available in the extruder type. [0004] More precisely, refer to figure 1 , figure 1 Illustrating this prior art machine in part in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B7/24B29B7/20B29B7/26B29C48/395B29C48/40B29C48/52B29B7/74
CPCB29B7/20B29B7/26B29B7/7495B29C48/395B29C48/402B29C48/525B29B7/183B29B7/186B29B7/28B29B7/484B29B7/582B29C48/37B29C48/475B29C48/92B29K2083/00B29K2021/00B01F27/722B01F2101/2805
Inventor U·科伦坡
Owner COLMEC