Chain link assembly, chain and film stretching device capable of reducing longitudinal shrinkage ratio

A technology of chain link components and chain links, which is applied in the direction of metal chains, flat products, household appliances, etc., can solve the problems of increased shrinkage of the film, scald scars of the film adhered to the roller, film slipping and scratches, etc., to eliminate The effect of excessive longitudinal shrinkage

CN105799149AActive Publication Date: 2016-07-27北京华腾佳和科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-07-27

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Abstract

The invention discloses a chain link assembly, a chain and a film stretching device. Transition chain links are arranged in the chain link assembly, conventional chain links can be folded in the radial direction, the axis distance between the adjacent transition chain links is changed while folding is carried out, the chain link assembly is arranged in the chain, clamps for clamping a film are arranged, the length of the chain of the film stretching device is changed wholly along with bending deformation of the chain link assembly, and accordingly the distance between the adjacent clamps is reduced; when transverse stretching is carried out, the clamping gap between the clamps shrinks, and the aim of longitudinal retraction is achieved while the transverse pulling process is carried out; and when the film stretching device caries out film transverse stretching work, longitudinal tensile force of the film is reduced under the high-temperature state, the film can be sufficiently and longitudinally pre-retracted, and the problem that the longitudinal shrinkage ratio is too large is solved in advance.
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Description

technical field

[0001] The invention relates to a chain link assembly, a chain and a film stretching device for reducing longitudinal shrinkage, and belongs to the technical field of plastic processing and molding devices. Background technique

[0002] In order to have a general understanding of the whole picture of stretch film, here is an overview of the whole picture of film stretching:

[0003] 1) Film stretching can be divided into sequential stretching and synchronous stretching according to the stretching sequence: 1. Sequential stretching is a bidirectional stretching in which a thick plastic film is first stretched longitudinally and then stretched transversely. Biaxial stretching is divided into two steps and carried out successively. (Of course, it is also possible to stretch horizontally first and then vertically) 2. Synchronous stretching is to stretch vertically while stretching horizontally. The advantage of synchronous stretching is that the properties of t...

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Embodiment Construction

[0030] Through the following description of the embodiments, it will be more helpful for the public to understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solutions of the present invention, any components or technical features Changes to the definition and / or formal but not substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solutions of the present invention.