Method for operating extrusion plants for extruding thermoplastics

A technology for thermoplastics and extrusion devices, applied in the field of extrusion devices for extruding thermoplastics, can solve problems such as thickness fluctuations of melts, and achieve the effect of simple configuration

Inactive Publication Date: 2007-09-19
布雷耶机器制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage here is that a large amount of scrap is produced during operation when adjusting the thickness due to the long reaction times
Since the technology is limited to thin sheet thicknesses and because the correspondingly high ambient temperature jumps affect the melt too strongly in its thickness, the thickness of the extruded melt fluctuates during operation.

Method used

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  • Method for operating extrusion plants for extruding thermoplastics
  • Method for operating extrusion plants for extruding thermoplastics
  • Method for operating extrusion plants for extruding thermoplastics

Examples

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Embodiment Construction

[0032] According to FIG. 1 , a conventional wide-slit nozzle 1 has a nozzle body 2 which can be heated by a conventional heating device 3 in order to produce extruded plastic material from a nozzle gap 4 in an extrusion device.

[0033] Here, the nozzle body 2 is subdivided, in particular in an outlet region 5 and a nozzle channel 10 , into lip elements 6 , 7 , wherein the lip parts 6 , 7 can be designed as rigid and / or flexible lips. Shaped elements 6,7.

[0034] Here, these lip elements 6, 7 or only one lip element 6 or 7 have some adjustment devices not shown in detail here, such as "fast-gap" adjustment devices or similar adjustment devices, so that automatic The nozzle gap is adjusted mechanically or mechanically with respect to the thickness of the nozzle gap. The adjusting device is used to quickly adjust the thickness of the outflow region of the nozzle element.

[0035] A disadvantage of conventional wide-slit nozzles is that the actual influence on the thickness of...

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Abstract

The invention relates to a method for operating an extrusion device used for extruding thermoplastics. The thermoplastics is extruded from a wide slot nozzle (1) connected behind theextrusion device by the extrusion device. In order to be effect on a thickness of a plastic melting substance, temperature treatment is additionally performed on an outlet region (5) of the wide slot nozzle (1) in a selective region on a width of the wide slot nozzle (1).

Description

technical field [0001] The invention relates to a method for operating an extrusion device for extruding thermoplastics with an extrusion device from a wide-slit nozzle connected downstream of the extrusion device. The invention also relates to a wide-slit nozzle for carrying out the method. Background technique [0002] This method and wide slot nozzles are known in various forms and embodiments. Extrusion of the plastic material is extruded by means of an extruder and produced through a heatable wide-slit nozzle, wherein the extruded liquid plastic melt is fed to a smoothing unit for further processing. [0003] Slit nozzles are to be understood as plate nozzles, film nozzles etc. which have a nozzle channel and form corresponding lip elements in the outlet region, wherein these lip elements can be arranged rigidly, flexibly or with corresponding adjustment devices . All forms of lip elements are to be included here. [0004] Wide-slit nozzles are used for the producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/14B29C47/86B29C47/92B29C48/08B29C48/305B29C48/92
CPCB29C2947/92314B29C2947/92647B29C2947/9238B29C47/0021B29C47/92B29C2947/92904B29C2947/92152B29C2947/92704B29C2947/92409B29C47/862B29C47/86B29C2947/92209B29C47/165B29C48/865B29C48/92B29C2948/92209B29C2948/92409B29C2948/92704B29C48/08B29C48/313B29C48/86B29C48/914B29C2948/92152B29C2948/92314B29C2948/9238B29C2948/92647B29C2948/92904
Inventor W·布雷耶
Owner 布雷耶机器制造有限责任公司
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