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Device And Method For Manufacturing Of Plastic Articles By Extrusion Blow Moulding

A technology for plastic products and extrusion devices, applied in the field of devices for manufacturing plastic products by extrusion blow molding and in the field of manufacturing plastic products, can solve the problems of lack of flexibility of adjustment rods, variability restrictions, production restrictions, etc., and achieve considerable material savings , the effect of reducing the size

Inactive Publication Date: 2015-06-24
KAUTEX TEXTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the variability of the wall thickness control over the width of the preform is limited with known devices, e.g. the absolute width of the preform cannot be influenced
The production of individual pointed protrusions over the width and length of the web-like preforms is also limited, since only limited thickness variations of the preforms are possible due to the lack of flexibility of the adjustment rods

Method used

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  • Device And Method For Manufacturing Of Plastic Articles By Extrusion Blow Moulding
  • Device And Method For Manufacturing Of Plastic Articles By Extrusion Blow Moulding
  • Device And Method For Manufacturing Of Plastic Articles By Extrusion Blow Moulding

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Embodiment Construction

[0038] exist figure 1 A part of a method for producing an extrusion-blown article from a web-shaped preform 1 is schematically shown in FIG. Each preform 1 is extruded pendulously from two wide-slit nozzles 2 . The slot nozzles 2 are part of an extrusion head, not shown, which is supplied with molten liquid thermoplastic in a known manner from the extruder.

[0039] For example figure 1 As shown, a preform 1 in the form of a web or sheet can be extruded between the open parts of the forming die 3 .

[0040]The molding die 3 includes two outer dies 3a and one middle die 3b. The outer molds 3 a each form a sub-cavity into which the pre-forms 1 are drawn or pressed and which respectively determine the later outer shape of the finished article. The manufacture of the article can take place, for example, by first extruding the individual preforms 1 between the open outer molds 3 a and the middle mold 3 b. The respective outer mold 3a is then closed relative to the central mold...

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Abstract

The invention relates to a device for the extrusion of web-shaped or belt-shaped preforms (1) made of thermoplastic plastic, having an extrusion head, the melt outlet of which is designed as a nozzle slit which can be adjusted perpendicular to the direction of extrusion and which extends straight. The device is characterized in that the nozzle slit (6) is bounded at least on one side directly by a number of segments (9) which can be adjusted perpendicular to the direction of extrusion independently of each other, the segments enabling a level-wise or step-wise adjustment of the width of the nozzle slit (6).

Description

[0001] This application is based on application number 200880018216.3 (international application number is PCT / EP2008 / 002914), the application date is April 12, 2008, and the title of the invention is "Devices for extruding planar or strip-shaped preforms from thermoplastics and A divisional application filed in the Chinese patent application for a method of extruding such a preform. technical field [0002] The invention relates to a device for producing plastic articles by extrusion blow molding. [0003] The invention also relates to a method for producing plastic articles, preferably using the device. Background technique [0004] A device of the type mentioned at the outset is known, for example, from utility model DE 20 2006 013 751 . Utility model DE 20 2006 013 751 U1 describes a forming tool for producing strip-shaped preforms, which comprises a plurality of channels each having an inlet in the shape of an annular segment and an elongated outlet, wherein each The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/04B29C47/16B29C47/92B29C48/08B29C48/13B29C48/30B29C48/31B29C48/345B29C48/92
CPCB29C49/04B29C49/20B29C51/02B29C51/12B29C51/267B29C2791/006B29C2791/007B29C48/92B29C48/07B29C48/08B29C48/12B29C48/313B29C2948/92609B29C2948/92628B29C2948/92647B29C2948/92904B29C48/13B29C49/06914B29C49/04108B29C49/071B29C49/04116B29C49/04112
Inventor J·埃克哈特M·弗兰克-迈因茨T·弗罗伊茨海姆G·沃尔特
Owner KAUTEX TEXTRON
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