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Extruder

A technology of extruder and conveyor, applied in the field of extruder, to reduce material load and avoid fatigue failure

Active Publication Date: 2012-12-19
约瑟夫·布拉赫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the field of application of this known extruder is limited by the screw and the kneading block since the housing bore cannot be engaged

Method used

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Examples

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Embodiment Construction

[0046] according to figure 1 , the twin-screw extruder comprises two twin-screw conveyor shafts 2, 3 arranged in the housing 1, which respectively have transmission elements 4, 5, each transmission element is rotatably fixed, for example via teeth 8, 9 On the support shafts 6,7.

[0047] The conveyor shafts 2, 3 are arranged to be driven in the same direction within the two housing holes 11, 12, wherein the hole walls 13 and 14 of the holes 11, 12 are connected to the center BM and the conveyor shaft extending through the housing holes 11, 12. The axes of rotation of the conveyor shafts 2, 3 are concentric with the center of rotation DM of the conveyor shafts 2, 3.

[0048] The bores 11 , 12 are therefore designed cylindrically or conically, wherein in the case of cylindrical bores 11 , 12 the axes of rotation are parallel to each other, in the case of conical bores the axes run at an angle towards each other.

[0049] The housing bores 11 , 12 have a diameter D. The axial ...

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PUM

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Abstract

The invention relates to an extruder having a housing (1), comprising at least two conveying shafts (2, 3) having mutually wiping conveying cross-sections which are disposed so as to be driven in the same direction in at least two housing bores (11, 12) which are of cylindrical or conical design and of which the axes (15, 16) are disposed parallel or at an angle to one another. The distance (A) between the axes of the two housing bores (11, 12) is greater than D / 1.4142, wherein D is the diameter of the cylindrical bore or the greatest diameter of the conical bore, and a clearance (a') is provided between the housing bores (11, 12) and the external diameter (DE) of the conveying shafts (2, 3). Each conveying shaft (2, 3) has a plurality of conveying sections (17a to d, 18a to d), wherein the rotational angle of at least two adjacent conveying sections (17a, 17b, 18a, 18b) on the respective conveying shaft (2, 3) is 180 DEG . The centre point (PM) of the cross-sectional profile of each cross-section (17a, 17b, 18a, 18b, etc.) is offset eccentrically in each case with respect to the centre point (BM) of the housing bore (11, 12) and the centre of rotation (DM) of the conveying shafts (2, 3).

Description

technical field [0001] The invention relates to an extruder according to the preamble of claim 1 . Background technique [0002] In extruders, preferably equipped with co-rotating screw shafts with twin-screw conveyors for continuous conveying, mixing, dispersing and extruding especially plastics, and can be used in continuous mechanical process processing. The ability to process as much product as possible with one screw element without loss of quality, intermediate cleaning or machine downtime is of great economic importance. There is a very close relationship between the residence time behavior of the product in the system and the material exchange and self-cleaning in the treatment area. A wide operating range means different applications and product categories. [0003] Twin screws with modular conveyor systems have been known for a long time. According to the prior art, for the design of the geometry of a close-meshing conveyor system, the gap between the inner diam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/48B29C47/40B29C47/42B29C47/64B29C48/395B29C48/43B29C48/52B29C48/67
CPCB29C47/0881B29B7/485B29C47/42B29C47/0009B29C47/38B29C47/402B29B7/489B29C47/605B29C47/6012B29C47/08B29B7/483B29C48/25B29C48/52B29C48/57B29C48/395B29C48/402B29C48/435B29C48/565B29C48/2715B29C48/03B29C48/44B29C48/405B29C48/43Y02P70/10B29C48/425B29C48/40B29C48/505B29B7/48B29B7/482
Inventor 约瑟夫·布拉赫
Owner 约瑟夫·布拉赫
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