Fountain solution backflow purification device for sheet paper printing machine

Abstract

The invention discloses a fountain solution returning and purifying device of a flat paper printer. The fountain solution returning and purifying device of the flat paper printer comprises a box body, wherein an annular pipe is arranged at the upper part of the interior of the box body; through holes are formed in the wall of the annular pipe; one side of the annular pipe is linked with one end of a water inlet pipe; the other end of the water inlet pipe extends out of the box body; a screen plate A and a screen plate B are arranged under the annular pipe in sequence; a screen is arranged on each of the screen plate A and the screen plate B; the screen plate A is horizontally arranged; the screen plate B is obliquely arranged; a precipitation tank is arranged below the screen plate B; an overflow outlet is formed in one side of the precipitation tank; an end cover is arranged at the upper end of the box body and is in hinged connection with one side of the box body; a handle used for opening the end cover is arranged on the end cover. According to the fountain solution returning and purifying device, the fountain solution is buffered by the annular pipe, filtered by the screens and precipitated by the precipitation tank, so that the impurities are filtered and precipitated and the bubbles are also eliminated; the printing quality is ensured.

Description

technical field [0001] The invention relates to a backflow purification device for dampening solution of a sheet paper printing machine. Background technique [0002] There is a water printing machine for sheet paper, which mainly uses the inherent characteristics of ps board, the principle of absorbing ink and repelling ink in the blank part, and absorbing and repelling ink in the graphic part, so the printing is to protect the blank part with water first, and then apply ink to the graphic part , Under the action of pressure, indirect transfer printing is carried out on the substrate. The fountain solution mainly protects the blank part to ensure that no ink appears in the blank part, so the quality of the fountain solution directly affects the printing effect. If the fountain solution contains impurities and air bubbles, there will be a lot of paste, dirty, false printing and other phenomena. The dampening solution of the original printing equipment is mainly circulated ...

AI Technical Summary

Problems solved by technology

The dampening solution of the original printing equipment is mainly circulated inside the dampening water tank, and then goes up to the printing tank again. Due to the high pressure of the dampening solution circulation pump, the dampening solution returns to the dampening water tank through the return pipe to generate a large number of air bubbles; the circulation The pump pumps the dampening solution with air bubbles to the printing equipment again, which will cause defects in the printed matter or a large number of waste products, so it is necessary to replace the dampening solution every day, and each replacement of the dampening solution requires a lot of working time and cost

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