Intermittent extrusion coater

A coating machine, intermittent technology, applied in the field of coating, can solve the problems of irregular tail, thin tail, thick head at the intermittent position of coating, etc., to simplify the mechanism, improve the precision, and save the control system Effect

Active Publication Date: 2013-10-30
SHENZHEN HAONENG TECH
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Problems solved by technology

[0004] The extrusion coating machine can realize intermittent coating through the high-speed switching valve. Because the piston of the high-speed switching valve moves up and down at high speed, it will generate an instant thrust or pull on the slurry, resulting in thicker head and irregular tail at the intermittent coating position. Phenomena such as thin tails have always been the bottleneck restricting the accuracy of intermittent extrusion coating

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Embodiment Construction

[0026] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0027] In the conventional intermittent extrusion coating method, the slurry is provided to the extrusion head, and then the slurry is intermittently applied to the substrate from the slit of the extrusion head, and the present invention provides an intermittent extrusion coating method. Cloth method, it also comprises the following steps in addition to conventional coating steps:

[0028] 1. When the extrusion head starts to apply slurry to the substrate, the slurry at the seam of the extrusion head is sucked back to make the slurry flow back;

[0029] 2. When the extrusion head stops applying slurry to the substrate, the slurry at the seam of the extrusion head is sucked back to make the slurry flow back.

[0030] The significance of th...

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Abstract

The invention discloses an intermittent extrusion coating method and an intermittent extrusion coater. According to the coating method, a matrix is coated with slurry intermittently through a seam of an extrusion head; and the coating method comprises the following steps that when the extrusion head coats the slurry on the matrix, the slurry at the seam of the extrusion head is sucked back to flow back; and when the extrusion head stops coating the slurry on the matrix, the slurry at the seam of the extrusion head is sucked back to flow back. According to the coating method, when the coating is started, the slurry in the extrusion head flows back in a trace amount at the moment of supplying, so that the slurry coated on the matrix is reduced and the thickness of the head in the intermittent coating can be effectively controlled; during intermittence, namely when the extrusion head stops coating, the slurry in the extrusion head flows back instantaneously, so that the slurry coated on the matrix can be quickly disconnected; and therefore, the uniformity of the tail during intermittence is effectively controlled.

Description

technical field [0001] The invention relates to the coating field, in particular to an intermittent extrusion coating machine and a coating method. Background technique [0002] Coating is widely used in new energy batteries, solar cells, optical films, flexible circuit boards and other industries, and it is also a key process that directly affects product quality. Coating is the process of uniformly, continuously or discontinuously coating the prepared paste-like viscous slurry on the front and back sides of the substrate (aluminum foil or copper foil), and then drying. [0003] Existing coating mainly adopts transfer type and extrusion type. Through experiments, extrusion coating machine technology is becoming more and more mature. Its mechanical structure is simple, the equipment is miniaturized, it saves space, it is easy to debug, it has high coating precision and high coating speed. [0004] The extrusion coating machine can realize intermittent coating through the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C5/00B05C11/10B05D1/26
Inventor 汪正堂
Owner SHENZHEN HAONENG TECH
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