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Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof

A technology of two-way stretching and experimental methods, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of undeveloped two-way stretching technology, and achieve continuous adjustment of stretching rate and stretching ratio. Small size, precise control effect

Inactive Publication Date: 2014-11-05
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still big problems in the film stretching processing industry. For example, polyethylene (PE), the most important raw material for polymer films, has no mature biaxial stretching technology (BOPE) in the world.

Method used

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  • Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof
  • Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof
  • Temperature-control high-speed large-strain membrane two-way stretching device and experimental method thereof

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Experimental program
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Embodiment Construction

[0041] Below in conjunction with accompanying drawing and embodiment further illustrate the present invention.

[0042] A temperature-controlled high-speed and large-strain film biaxial stretching device, see attached figure 1 , including high-precision servo motor 1, "well"-shaped guide rail 2, scissor mechanism 3, high-pressure pneumatic clamp 4, tension sensor 5, film sample 6, preheating furnace 7, stretching furnace 8, and is a high-precision ball screw 9. "Organ-style" protective cover 10, strain and stretching speed control system 11, hot air circulation system 12; high-precision servo motor 1 drives "well"-shaped guide rail 2 to move independently, so that scissor mechanism 3 completes telescopic movement, scissors The fork mechanism 3 realizes the stretching of the film sample 6 through multiple high-pressure pneumatic clamps 4. The stretching method can be selected as one-way or two-way stretching, and the running speed is continuously adjustable, which can well matc...

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Abstract

The invention provides a temperature-control high-speed large-strain membrane two-way stretching device and an experimental method thereof. A servo motor drives four #-shaped guide rails to move, and a membrane sample is stretched through a scissors mechanism. A high-pressure pneumatic clamp quickly clamps the sample and can realize pressure compensation. Two independent temperature control furnaces are respectively used for preheating the device and stretching the sample. A hot air circulating system can be adopted to realize rapid temperature rise of the control furnaces and also can ensure the temperature uniformity of cavities. Tension sensors are respectively mounted in two stretch directions and used for collecting stress-strain information in the membrane stretching process. The servo motor drives a ball screw so as to enable a stretch part to be switched among different stations. The temperature-control high-speed large-strain membrane two-way stretching device can realize two-way synchronous stretching, two-way asynchronous stretching, limited one-way stretching and unlimited one-way stretching, thus being a good device for simulating industrial membrane stretching processing and establishing the relationship between processing parameters and the membrane structure performance.

Description

technical field [0001] The invention relates to the technology of the relationship between processing conditions and film structure evolution in polymer film stretching processing, specifically relates to a film bidirectional stretching device, temperature control and electrical control system and its experimental method, capable of studying stretching mode, temperature, stretching rate and stretch ratio on the structural properties of different film samples. By coupling the structure (crystallinity, orientation degree, lamella long period) and properties (optical properties, mechanical properties) of the stretched film with the mechanical data during the stretching process, the relationship between the external field parameters and the film structure and properties can be obtained. It is used in the laboratory to simulate the actual film stretching processing conditions and reveal the scientific problems of film industrial processing. Background technique [0002] The fina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
Inventor 李良彬孟令蒲林元菲陈晓伟徐佳丽李薛宇张瑞张前磊
Owner UNIV OF SCI & TECH OF CHINA
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