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Method of manufacturing a tube

A technology for objects and stretching components, which is applied in the direction of measuring devices, instruments, and mechanical devices, can solve problems such as not providing corrections, and achieve the effects of simplifying the manufacturing process, reducing costs, and speeding up the manufacturing process

Inactive Publication Date: 2009-12-02
EMTELLE UK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the method of JP 9-145304 does not provide any correction, which allows metal balls to be driven through the metal detector even if they do not affect the overall performance of the tube.

Method used

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  • Method of manufacturing a tube
  • Method of manufacturing a tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] refer to figure 1 , the in-line device 2 comprises an extruder 4 which feeds molten plastic material, such as polyethylene, into a crosshead die 6 to produce a tube 8 which is then cooled in a vacuum box 10 and calibrated to the correct the outer diameter. The tube passes through the device 2 left to right in the figure by means of a crawler 12 with rollers and rubber gripping belts 16 , then the tube 8 is wound onto a drum (not shown) by means of a pick-up unit 16 . Such equipment for making tubes is commercially available from Nextrom Technologies, Route du Bois 37, CH-1024 Ecublens, Lausanne, Switzerland.

[0041] The device 2 also includes a body 24 in the form of a metal rod, the diameter of which is slightly smaller than the inner diameter of the tube 8 . A rod 24 is attached to one end of a first tensile element in the form of a first wire 22 , the other end of which is attached to one end of a second tensile element in the form of a second wire 20 . The fract...

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PUM

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Abstract

A method of manufacturing a tube (8) is disclosed. The method comprises: forming a tube (8) by extrusion; moving an object (24) longitudinally relative to the inner bore of the tube (8) and determining whether movement of the object (24) relative to the tube (8) has stopped . at least a part of said pressing step and said step of moving the object (24) relative to the bore of the tube (8) are carried out simultaneously; and by means of at least one first tensile element attached to said object (24) (22) causing the object (24) to move relative to the bore of the tube (8).

Description

technical field [0001] The invention relates to a method of manufacturing a tube. The present invention relates particularly, but not exclusively, to a method of making pipes for conveying fluids, or in some cases solid materials, from one place to another. Background technique [0002] In order to efficiently convey fluid and / or solid materials through the tube, it is desirable that the interior of the tube be substantially free of obstructions. [0003] However tubes - especially tubes made of plastic material by extrusion - tend to become at least Partially clogged, which prevents effective use of the tube. This is especially true where the tube is extruded at high line speeds. Thus, it is desirable to check over the length of the tube to ensure that any obstructions are not large enough. [0004] In the case of manufactured pipes with a large diameter and not particularly long, a visual inspection can be carried out. For example, a polyvinyl chloride (PVC) pipe with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/92G02B6/44G01N19/08B29C48/92B29C48/90
CPCB29C2947/92076B29C2947/92295B29C47/902B29C47/0023B29C2947/92428B29C47/92B29C48/06B29C48/09B29C48/902B29C48/905B29C48/908B29C48/919B29C48/92B29C2948/92076B29C2948/92295B29C2948/92428
Inventor 乔治·亨利·普拉特·布朗
Owner EMTELLE UK