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Ventilation nozzle and plastic film stretching system having associated ventilation nozzle

A technology for ventilation nozzles and nozzle outlets, applied in the field of plastic film stretching equipment

Active Publication Date: 2012-10-03
BRUECKNER MASCHB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, primarily in the stretching plant there are the following disadvantages due to the V-shaped stretching zone of the goods web in the stretching zone (in the transverse stretching zone and / or in the simultaneous stretching plant):

Method used

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  • Ventilation nozzle and plastic film stretching system having associated ventilation nozzle
  • Ventilation nozzle and plastic film stretching system having associated ventilation nozzle
  • Ventilation nozzle and plastic film stretching system having associated ventilation nozzle

Examples

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Embodiment Construction

[0035] figure 1 shows schematically the basic construction of a plant for processing web-like material, more precisely a plastic film stretching plant. In this plastic film stretching device, the material web 3', more precisely the plastic film 3, is stretched continuously in the transverse direction or simultaneously in the longitudinal and transverse directions.

[0036] For this, a vertical plane or symmetry plane M (perpendicular to figure 1 The plane of the illustration in ) provides two closed, circumferential tong rails 5 on which the tongs 7 can be looped. exist figure 1 Several clamps 7 are shown in . Here, the plastic film is conveyed through the device coming from the left, wherein the circumferential grippers 7 clamp the film 3 opposite each other at the edge 3a of the material web, that is to say at the edge 3a of the plastic film, and make the Its motion moves through the device. After heating zone A, the clamps are separated from each other in a V-shape in ...

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Abstract

The invention relates to an improved ventilation nozzle, in particular for heating web-shaped materials (3), comprising a supply chamber (17) and a distribution chamber arrangement (19), which is connected to the supply chamber (17) via an overflow arrangement. An improvement can be achieved in that in the ventilation nozzle (9) at least one temperature-control section (35) extending in the longitudinal direction (L) of the ventilation nozzle is provided with an integrated heating device (35a).

Description

technical field [0001] The invention relates to a ventilation nozzle according to the preamble of claim 1 , in particular for heating up a strip of web material, and to a plastics film stretching device according to claim 15 . Background technique [0002] Such ventilation nozzles are known, for example, from EP 0907476 B1. With the aid of such previously known ventilation nozzles, hot or cold gas, commonly referred to as process gas, can be introduced into a supply chamber, from which process gas can flow via a pressure compensation chamber into a distribution chamber. In the dispensing chamber there is a static pressure which is as uniform as possible, which is converted into a dynamic pressure and thus into an outflow velocity when the flow out of the ventilation nozzle is carried out. The uniformity of the outflow velocity transverse to the cargo web is related to the uniformity of the static pressure in the distribution chamber. Due to the uniform flow of the air or g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/08B29C55/16B29C35/04
CPCB29C55/165B29C55/08B29C35/045
Inventor M・梅策
Owner BRUECKNER MASCHB
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