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Ventilation module for a film stretching system and film stretching system of this type

A technology of stretching equipment and channels, which is applied in the field of ventilation modules, can solve problems such as the influence of plastic film web properties on transparency, and achieve the effects of small temperature fluctuations and high heat transfer coefficients

Active Publication Date: 2020-07-03
BRUNCKNER MASCHINENBAU GMBH
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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 a film stretching system and film stretching system of this type
  • Ventilation module for a film stretching system and film stretching system of this type
  • Ventilation module for a film stretching system and film stretching system of this type

Examples

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Embodiment Construction

[0040] figure 1 A top view of a film stretching plant 1 according to the invention is shown. The film stretching device 1 can be configured as a longitudinal stretching device or as a transverse stretching device or as 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 a 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 preheating 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 called neutral zone and the fifth zone 1e is ca...

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Abstract

The invention relates to a ventilation module (3) for a film stretching system (1) comprising at least one first outlet nozzle arrangement (8) having an outlet nozzle (8a), wherein the at least one outlet nozzle (8a) extends with its longitudinal direction (5) transverse or perpendicular to the withdrawal direction (4) of a plastic film web (2) and is oriented in parallel to the transport plane (7). A first return system (9) is provided with at least two extraction channels (10a, 10b), each having an extraction region (11a, 11b). The at least two extraction regions (11a, 11b) are spaced apartfrom one another in the withdrawal direction (4) and oriented in parallel to the transport plane (7). The at least one outlet nozzle (8a) of the at least one first outlet nozzle arrangement (8) is arranged between the first and the second extraction region (11a, 11b). The at least two extraction regions (11a, 11b) are arranged exclusively before and / or after the at least one first outlet nozzle arrangement (8) in the withdrawal direction (4) of the plastic film web (2).

Description

technical field [0001] The invention relates to a ventilation module for a film stretching plant and to such a film stretching plant. Such film stretching devices are, for example, longitudinal stretching devices, transverse stretching devices, sequential stretching devices with longitudinal and transverse stretching stages or simultaneous stretching devices. Background technique [0002] Such film stretching plants for producing plastic films are divided into different zones in which different temperatures exist. Ventilation modules are required for a corresponding temperature regulation of the plastic film, which can also be referred to as a film. This temperature regulation serves on the one hand to be able to generate or set certain membrane properties. On the other hand, the plastic film web can also be technically stretched, that is to say (longitudinal and / or transverse) stretched, by tempering the plastic film web. In this case, such a film stretching device compr...

Claims

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Application Information

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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 BRUNCKNER MASCHINENBAU GMBH
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