Coatings pressure screen

Abstract

The invention discloses a coating pressure sieve, comprising a sieve body which is a hollow structure; a hollow cavity is internally provided with a sieve drum which can rotate around a central shaft;the sieve drum is arranged on the sieve body by the central shaft; a driver is arranged outside the sieve body; the output end of the driver is connected with the sieve drum; the surface of the sievedrum is provided with a spiral guide plate, the external side of which is provided with a scraper; a sieve net is arranged outside the sieve drum; the clearance between the sieve net and the sieve drum forms an internal sieve chamber; and the scraper is arranged inside the internal sieve chamber and closely contacts with the surface of the sieve net. The coating pressure sieve adopts an active type to carry out filtration operation, uses the self-power to drive the sieve drum to rotate, uses the spiral guide plate and the scraper on the sieve drum for effectively scraping and removing the grains attached to the sieve net, so as to prevent the sieve net from being blocked and to generate a downward pushing force simultaneously, thus being beneficial for the coating to flow out of the sievequickly after filtration; full sealing typed pressure sieving is adopted in the whole process, thus avoiding the coating from drying or generating air bubbles after the coating thinner is evaporated;and the coating pressure sieve is convenient for use and can effectively improve the coating quality and coating efficiency.

Description

technical field [0001] The invention relates to a filter sieve, in particular to a pressure sieve used in printing or papermaking industry for coating coating or pigment coloring and filtering the coating. Background technique [0002] In industries such as papermaking and printing, the uniformity of paint coating or pigment coloring directly affects the quality of paper and printing. In the past, when using paint or pigments, the paint or pigments were mixed with solvents such as water to adjust to a suitable viscosity, and then It is transported to the coating knife or printing knife through the delivery pipe. In order to prevent the larger particles in the paint from entering the coating knife or printing knife and affecting the coating or printing quality, a filter screen is required on the delivery pipe to screen out undissolved particles. Larger particles. According to the structural form, the filter screen usually has two types: closed type and open type. At present,...

AI Technical Summary

Problems solved by technology

According to the structural form, the filter screen usually has two types: closed type and open type. At present, the closed type filter screen that is widely used is basically a filter or filter net for passive filtration. This type of filter screen has a simple structure and is not equipped with power. Pressure filters the paint forcibly, larger particles cannot pass through the filter screen and accumulate on one side of the filter screen, and some adhere to or get stuck on the screen, so it is easy to block the delivery pipe during use, and the screen needs to be cleaned or replaced frequently screen, which seriously affects production efficiency, and even affects coating or printing quality due to uneven flow, and this type of filter screen has a narrow application range, and is only suitable for low-viscosity paint filtration, and the filtering effect for high-viscosity and low-solid content paint is not ideal. ;The open filter method is to introduce the paint into the vibrating screen. Due to the vibration of the vibrating screen, larger particles are not easy to adhere to the filter screen, ensuring sufficient filtration of the paint and uniform flow. However, because the filtered paint is in contact with the air, use Defects such as bubbles are prone to occur during the process, and solvents such as moisture in the paint are easy to disperse, making the paint dry, and the solid content changes greatly, affecting the coating quality and effect

Images