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Extrusion apparatus for the production of plastic pipes, and flexible seal for said device

A technology of extrusion molding and plastic pipes, which is applied in the direction of pipes/pipe joints/fittings, pipes, mechanical equipment, etc., can solve problems such as leaks, and achieve the effect of simple structure and full maintenance of freedom

Inactive Publication Date: 2011-04-06
KRAUSSMAFFEI TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And hitherto no material has been found that is suitable over the entire range from 70 mm to 160 mm and 140 to 250 mm in which the pipe diameter can move: due to operation at larger dimensions, the material deforms plastically, while the subsequent change to smaller dimensions resulted in significant leaks

Method used

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  • Extrusion apparatus for the production of plastic pipes, and flexible seal for said device
  • Extrusion apparatus for the production of plastic pipes, and flexible seal for said device
  • Extrusion apparatus for the production of plastic pipes, and flexible seal for said device

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Embodiment Construction

[0027] The illustrations in the drawings are not to actual size. Identical or identically acting elements are identified with the same reference symbols.

[0028] exist figure 1 shows an extrusion molding device 1 for producing so-called continuous profiles, wherein the continuous profiles are in particular plastic pipes. The extrusion device comprises in turn (not shown) a melting device for providing the deformable raw material, a (not shown) sizing device for defining the shape of the continuous profile, in particular the diameter of the plastic pipe.

[0029] After the plastic pipe has been produced in this way as a continuous profile, it is still in a state where it can be easily deformed and any external influences can change the outer dimensions of the plastic profile. In particular, plastic pipes that are still softened may collapse under atmospheric pressure. Thus, the semi-finished product is stabilized in the vacuum tank 2 in which the plastic tube hardens under ...

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Abstract

The invention relates to an extrusion apparatus (1) for producing continuous profiled elements (8), in particular plastic pipes. Said extrusion apparatus (1) successively comprises: a melting device for supplying moldable raw material; a molding device for defining the shape of the continuous profiled element, especially the diameter of the plastic pipe; a vacuum device (2) for stabilizing the shape of the continuous profiled element, especially the diameter of the plastic pipe; and a water storage container (4) for air-tightly sealing the vacuum tank. Said water storage container (4) has a funnel-shaped seal (6) at the outlet for sealing purposes and for removing moisture from the continuous profiled element, in particular the plastic pipe. In order to be able to automatically adjust the opening diameter of the collar to the pipe diameter in a tight and flexible manner without requiring much maintenance, the funnel-shaped seal (6) encompasses a substantially truncated cone-shaped collar (9) that has an outlet (7) for the continuous profiled element, in particular the plastic pipe. The diameter of the outlet (7) can be adjusted to the continuous profiled element, in particular the plastic pipe, by constricting a predefined constriction zone (11) of the end seal.

Description

technical field [0001] The invention relates to the production of continuous profiles and in particular plastic tubes with a predetermined, variable diameter in an extrusion device according to the preamble of claim 1 . In particular, the invention also relates to funnel-shaped seals with a flexible design of the sealing collar. Background technique [0002] Extrusion devices are used for the manufacture of continuous profiles, especially pipes. In this case, a plastic melt is first produced in an injection molding machine, which is molded by means of an outflow nozzle. In order to ensure that the continuous profile is dimensioned as desired, after shaping the continuous profile passes through a sizing device in which the continuous profile is dimensionally precisely sized. Next, the tube is stabilized in a vacuum tank, wherein, by negative pressure in the tank, collapse of the tube is avoided and the diameter is then kept constant until the tube cools down and has the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/08B29C47/90F16L5/10B29C48/09B29C48/90
CPCB29C47/0023B29C47/0808B29C47/903B29C48/09B29C48/254B29C48/913B29C48/903B29C48/905
Inventor A·阿尔特曼
Owner KRAUSSMAFFEI TECH GMBH
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