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Stretching device for stretching film of synthetic material at least in transverse direction

一种拉伸装置、合成材料的技术，应用在拉伸装置领域，能够解决生产速度降低等问题，达到减小磨损速率、良好引导、限制产品损失的效果

Active Publication Date: 2018-09-25
MARCHANT SIMPLIFIED GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a significant reduction in production speed

Method used

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  • Stretching device for stretching film of synthetic material at least in transverse direction
  • Stretching device for stretching film of synthetic material at least in transverse direction
  • Stretching device for stretching film of synthetic material at least in transverse direction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0089] figure 1 A production device 2 is shown for producing a film 3 made of synthetic material with two substantially parallel longitudinal edges 4 .

[0090] The production facility 2 comprises in turn:

[0091] - Synthetic material 6 supply system 5,

[0092] - an extruder 7, allowing a controlled supply of synthetic material 6,

[0093] - a system 8 for melting synthetic materials 6,

[0094] - a casting drum 9 on which the film 3 is formed by the outflow of the molten synthetic material 6,

[0095] - a longitudinal stretching system 11 for stretching the film 3 in the longitudinal direction, the longitudinal stretching system 11 comprising differential speed (speed difference) rollers 12 to carry and stretch the film 3, and

[0096] - A stretching system 13 for stretching the film 3 at least in the transverse direction.

[0097] This stretching system 13 comprises an oven (not represented in the figure) allowing the temperature of the film 3 to be adjusted during it...

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PUM

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Abstract

A stretching device comprises a guide rail, first clamps of a first type and second clamps of a second type each intended to grip the same longitudinal edge of a film and alternately disposed along the guide rail, and an endless chain connected to the first and second clamps and configured to drive the first and second clamps along the guide rail, the endless chain being deformable between a firststate and a second state in which the first and second clamps are respectively disposed close to or distant from each other. Each first clamp and each second clamp respectively include a primary guide roller and a secondary guide roller configured to cooperate with the guide rail, the first and second clamps being configured such that when the endless chain is in the first state, the primary guide roller of each first clamp and the secondary guide roller of each second clamp adjacent to said first clamp overlap at least partially.

Description

technical field [0001] The invention relates to a stretching device for stretching a film made of synthetic material at least in the transverse direction. Background technique [0002] During the manufacture of a film made of synthetic material, such as a film made of polypropylene, polyester or any other thermoplastic material, the film is successively subjected to a longitudinal stretching step followed by a transverse stretching step after its formation . [0003] Known stretching systems configured to stretch a film made of synthetic material in the transverse direction comprise: an oven which allows adjustment of the temperature of the film during the stretching of the film in the transverse direction; Stretchers, which are arranged on both sides of the membrane. More specifically, each stretching device includes: [0004] - a guide rail (guide rail), it extends at least partly in this furnace, and comprises the first guide surface that turns toward this film and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/14B29C55/16B29C55/20
CPCB29C55/146B29C55/165B29C55/20B29C55/143B29C48/0018B29C55/08B29C55/14B29C55/16B29K2105/256
Inventor 卡罗来纳·马尔尚特
Owner MARCHANT SIMPLIFIED GMBH
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