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Ventilation module for film stretching equipment and such film stretching equipment

A technology of stretching equipment and channels, which is applied in the field of ventilation modules, can solve the problems of the influence of transparency on plastic film web properties, etc.

Active Publication Date: 2022-07-15
BRUECKNER MASCHB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, for example, crystallization begins or ends at different points in time or at different positions, whereby the properties of the plastic film web, such as transparency, etc., are adversely affected

Method used

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  • Ventilation module for film stretching equipment and such film stretching equipment
  • Ventilation module for film stretching equipment and such film stretching equipment
  • Ventilation module for film stretching equipment and such film stretching equipment

Examples

Experimental program
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Embodiment Construction

[0040] figure 1 A top view of the film stretching apparatus 1 according to the invention is shown. The film stretching device 1 can be configured as a longitudinal stretching device or a transverse stretching device or a sequential stretching device with longitudinal and transverse stretching stages or as a simultaneous stretching device. The film stretching device 1 is used for stretching the plastic film web 2 and for this purpose is divided, for example, into different zones 1a, 1b, 1c, 1d and 1e. Of course, it is not necessary for all of these regions 1a to 1e to exist in practice. In the different zones 1a to 1e, the plastic film web 2 is subjected to different temperatures in order to generate or set certain film properties. The first zone 1a is also referred to herein as a preheat zone. The second zone 1b is called the stretching zone, and the third zone 1c is called the further heating zone. The fourth zone 1d is also referred to as a neutral zone, and the fifth zo...

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Abstract

The invention relates to a ventilation module for a film stretching plant, comprising a first blow-out nozzle arrangement with blow-out nozzles whose longitudinal direction extends transversely or perpendicularly to the withdrawal direction of the plastic film web and Oriented parallel to the transport plane. The first suction system is provided with at least two suction channels, each of which has a suction area. At least two suction regions are spaced apart from each other in the extraction direction and oriented parallel to the transport plane. The blowing nozzles of the first blowing nozzle arrangement are arranged between the first and second suction regions. The at least two suction regions are arranged only before and / or after the first blow-out nozzle arrangement in the drawing-out direction of the plastic film web, the at least one first blow-out nozzle arrangement comprising a plurality of nozzle boxes; There is a substantially gas-tight or completely gas-tight cover device at intervals or at a distance from the two nozzle boxes, whereby the two adjacent suction regions of the different blow-out nozzles are limited in their extension.

Description

technical field [0001] The present invention relates to a ventilation module for a film stretching apparatus and to such a film stretching apparatus. Such a film stretching device is, for example, a longitudinal stretching device, a transverse stretching device, a sequential stretching device with longitudinal and transverse stretching stages, or a simultaneous stretching device. Background technique [0002] Such a film stretching apparatus for the production of plastic films is divided into different zones in which different temperatures exist. For the corresponding temperature control of the plastic film, which can also be referred to as a foil, a ventilation module is required. This temperature control serves on the one hand to be able to generate or set certain film properties. On the other hand, by tempering the plastic film web, the plastic film web can also be stretched technically, ie stretched (longitudinal and / or transverse). In this case, such a film stretchin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C55/02
CPCB29C51/421B29C55/02B29C55/12B29C35/045B29C35/16B29C2035/046B29C2035/1666B29L2007/008B29C55/165
Inventor M·鲍迈斯特A·贾波利斯T·霍伊斯尔M·翁特雷纳
Owner BRUECKNER MASCHB
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