Coating device and production process used in blown film equipment

Abstract

The invention relates to a coating device for improving the interior of blown film equipment and a production process. The coating device comprises a rack, a deviation correcting device, a tension control device, guide rollers, a traction device, a first intaglio coating component, a second intaglio coating component, a third intaglio coating component, a fourth intaglio coating component and a horizontal labyrinth dryer. By adopting the coating device, double surfaces of a wide-size agriculture greenhouse film (other functional films) can be quantitatively coated for two or multiple layers, each unit is independently driven, or the thickness and the content of other effective components of each layer of a functional coating liquid are quantitatively controlled according to the specification of each unit net wire, so that special functions of the agriculture greenhouse film (other functional films) are improved or added, and the continuity and the quality uniformity and stability in production are ensured.

Description

technical field [0001] The invention relates to a coating device and production process used in blown film equipment. Background technique [0002] In order to improve the physical and chemical properties of the agricultural greenhouse film, people usually apply some modified liquid (also known as "functional coating liquid") on the surface of the agricultural greenhouse film after the agricultural greenhouse film is extruded. The functional coating solution is solidified and formed into a functional coating. Common functional coating liquids include anti-dripping agent liquid, anti-fogging agent liquid, etc. For example, the coating formed by anti-dripping agent liquid and anti-fogging agent liquid is as follows: During the use of agricultural greenhouse film, water vapor is easy to condense on the surface of the greenhouse film, which not only hinders the transmission of light, but also dews at low temperature. Ice water droplets form on the surface of crops, affecting t...

AI Technical Summary

Problems solved by technology

[0007] 1. The coating thickness on both sides of the agricultural greenhouse film is not equal, and the inner surface (that is, the side that contacts the inner guide roller) has a smaller coating thickness, while the outer surface (that is, the side that does not contact the inner guide roller) has a thicker coating. Large, resulting in uneven coating thickness on both sides of the film

[0008] 2. The coating thickness of the agricultural greenhouse film cannot be adjusted uniformly in the vertical direction

Moreover, the production speed of the agricultural greenhouse film will fluctuate during the production process, which will inevitably lead to fluctuations in the running speed of the film in the functional coating solution, which in turn will cause the coating thickness of each part to fluctuate along the vertical and horizontal directions of the agricultural film

Existing coating devices and coating processes cannot actively correct and regulate such fluctuations in coating thickness

[0009] 3. In the existing coating device structure and coating process, affected by the device, only one functional coating solution can be applied to the surface of the agricultural greenhouse film, and two or even multiple functional coatings cannot be performed, that is, Under the existing equipment, it is impossible to increase or improve the related performance of the agricultural greenhouse film by increasing the variety of functional coating liquid.

[0010] 4. The structure and coating process of the existing coating device mainly rely on the coating of the film through the dipping roller in the coating solution, which cannot control the coating amount on the surface of the film, and cannot achieve quantitative control, and the performance of the coating layer is stable. Unstable sex and large waste

Images