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Curtain coating cooling and producing devices and methods

A technology of cooling device and cooling method, applied in production device and method device, casting cooling field, can solve problems such as insufficient film crystallinity

Active Publication Date: 2020-09-22
JIANGSU SENIOR NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a casting cooling, production device and method device, which can better release the thermal stress inside the film, and can effectively improve the problem of insufficient film crystallinity or insufficient rebound

Method used

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  • Curtain coating cooling and producing devices and methods
  • Curtain coating cooling and producing devices and methods
  • Curtain coating cooling and producing devices and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] A casting production method, comprising: extruding a casting melt; casting the extruded melt on a cooling roll 121 for cooling and shaping to obtain a cast film 200; The first air cooling treatment is performed; then the cast film 200 is heat treated in the heat treatment unit 123 ; and the cast film 200 is subjected to the second air cooling treatment in the second air cooling unit 124 .

[0081] in:

[0082] Each air-cooled processing unit includes a first cold air assembly 1221 and a second cold air assembly 1222, and a first partition and a second partition are arranged at intervals in the air outlet channel of each air cooling assembly along the air outlet direction, and the first partition The distance between the plate and the second partition is 10 cm, the diameter of the outlet hole 1227 of the first partition is 2 mm, and the diameter of the outlet hole 1227 of the second partition is 10 mm. Five sets of heating guide rollers 1231 are arranged in the heat tre...

Embodiment 2

[0088] A casting production method, which differs from Example 1 in that:

[0089] The cast film 200 is a PP film with a thickness of 12 μm, and the overall speed of the film is 120 m / min.

[0090] In the first air-cooling treatment, the treatment temperature is 30°C and the wind speed is 2-3m / s.

[0091] In the heat treatment, the temperature of the first set of heating guide rollers 1231 is 110°C, and the increment of the speed ratio between the rolls is +0.3%; the temperature of the second set of heating guide rollers 1231 is 130°C, and the increment of the speed ratio between the rolls is +0.2% The temperature of the third group of heating guide rollers 1231 is 129°C, and the increment of the speed ratio between the rollers is +0.2%; the temperature of the fourth group of heating guide rollers 1231 is 125°C, and the increment of the speed ratio between the rollers is 0%; the fifth The temperature of the set of heated guide rollers 1231 is 105°C, and the increment of the spe...

Embodiment 3

[0094] A casting production method, which differs from Example 1 in that:

[0095] The cast film 200 is a PP film with a thickness of 23 μm, and the overall speed of the film is 90 m / min.

[0096] In the first air-cooling treatment, the treatment temperature is 20°C and the wind speed is 4-5m / s.

[0097] In the heat treatment, the temperature of the first set of heating guide rollers 1231 is 100°C, and the increment of the speed ratio between the rolls is +0.4%; the temperature of the second set of heating guide rollers 1231 is 110°C, and the increment of the speed ratio between the rolls is +0.3% The temperature of the third group of heating guide rollers 1231 is 120°C, and the increment of the speed ratio between the rollers is +0.2%; the temperature of the fourth group of heating guide rollers 1231 is 100°C, and the increment of the speed ratio between the rollers is -0.3%; The temperature of the five sets of heated guide rollers 1231 is 80°C, and the increment of the spee...

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Abstract

The invention provides a curtain coating cooling and producing devices and methods, and belongs to the technical field of curtain coating production. The curtain coating cooling device comprises a cooling roll, a first air cooling unit, a heat treatment unit and a second air cooling unit. The first air cooling unit is arranged at the downstream position of the cooling roll. The heat treatment unitis arranged at the downstream position of the first air cooling unit, and a heating guide roll for allowing a curtain coating film to be wound around is arranged in the heat treatment unit. The second air cooling unit is arranged at the downstream position of the heat treatment unit. The curtain coating cooling method comprises the steps that an extruded melt curtain coating is cooled and shapedon the cooling roll, and the curtain coating film is obtained; after cooling and shaping treatment is carried out, the curtain coating film is subjected to first air cooling treatment, and then the curtain coating film is wound around the heating guide roll for heat treatment; and then the curtain coating film is subjected to second air cooling treatment. The curtain coating producing method comprises the curtain coating cooling method. Heat stress in the film can be released better, and the problem that an imporous precursor film is insufficient in crystallinity degree or springback can be effectively relieved.

Description

technical field [0001] The present application relates to the technical field of casting production, in particular, to a casting cooling, production device and method device. Background technique [0002] In the prior art, the preparation process of the diaphragm is to extrude the melt, cool and shape it through a casting roll to obtain a non-porous precursor film, and then sequentially perform annealing treatment, stretching treatment, heat treatment and winding treatment on the non-porous precursor film. [0003] In the current separator production process, there are often problems of insufficient crystallinity or insufficient springback of the non-porous precursor film and insufficient internal thermal stress release before the film is wound, which leads to the phenomenon that the film is prone to ribbing after winding. Contents of the invention [0004] The purpose of this application is to provide a casting cooling, production device and method device, which can bette...

Claims

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Application Information

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IPC IPC(8): B29C41/26B29C41/46B29L7/00
CPCB29C41/26B29C41/46B29L2007/00
Inventor 刘龙
Owner JIANGSU SENIOR NEW MATERIAL TECH CO LTD
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