Hedge device for liquid level sensor of color film coating machine

Abstract

The utility model provides a fence device for a liquid level sensor of a color film coating machine, which comprises an annular piece fixed on the outer side of a capacitive liquid level sensor, a plurality of filter holes are formed in the annular piece, and the height of the annular piece is matched with that of a detection end of the capacitive liquid level sensor. According to the capacitive liquid level sensor, the annular piece with the filter holes is arranged on the outer side of the capacitive liquid level sensor, bubbles can be effectively prevented from being attached to the outer side of the capacitive liquid level sensor, the numerical value detected by the capacitive liquid level sensor is correct and stable, and product badness and scrapping caused by unstable numerical value detected by the capacitive liquid level sensor can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to dip coating type coating machine technical field especially relates to a kind of fence device for liquid level sensor of color film coating machine. BACKGROUND

[0002] Glass substrate color film coating is the key process in display panel manufacturing.Glass substrate color film coating is the technology that color filter (CF) material is coated on glass substrate to realize the colorization of display panel.Color filter is composed of red (R), green (G), blue (B) three primary color color resistance, etc., can absorb part of light spectrum in natural light, only pass through monochromatic spectrum matched with it, form the base color in color mixing.Common coating machine has slit coating machine, dip coating type coating machine etc.Dip coating type coating machine mainly works based on the adhesion principle of liquid.Glass substrate or other substrate to be coated is immersed into roller cleaning tank and DIP tank (immersion tank) filled with coating liquid in turn, to ensure that substrate surface fully contacts coating liquid.When substrate is taken out from tank, due to surface tension and viscosity of liquid, uniform coating layer is formed on substrate surface.

[0003] In dip coating process, dip coating speed and stable liquid level are the key factors to ensure coating quality.If liquid level fluctuates greatly, when substrate is immersed into DIP tank 6, the depth of contact to coating liquid and pressure of coating liquid etc.

[0004] In order to measure the liquid level of coating liquid in DIP tank 6, capacitive liquid level sensor is usually installed in DIP tank 6.When new coating liquid is replenished, surface tension of coating liquid decreases.Surface tension decrease makes liquid more easily form bubble 7, gas originally dissolved in liquid is more easily escaped to form bubble, adhere around capacitive sensor, as shown in Fig. Figure 1 Bubble adhered around capacitive sensor easily causes the large range fluctuation of amplifier value of capacitive liquid level sensor, thus problem easily causes product coating uneven or coating thickness exceeds standard during coating, leads to product scrap, affects factory cost and yield. UTILITY MODEL CONTENTS

[0005] The utility model solves technical problems, and provides a kind of fence device for liquid level sensor of color film coating machine, can prevent bubble around liquid level sensor in DIP tank.

[0006] The utility model is realized as follows:

[0007] The utility model provides a kind of for the liquid level sensor of color film coating machine palisade device, including the annular piece of being fixed in the outside of capacitive liquid level sensor, the annular piece is equipped with several filter holes, the height of the annular piece is matched with the height of capacitive liquid level sensor detection end.

[0008] Further, the capacitive liquid level sensor is fixedly connected with a sealing gasket, and the annular piece is welded on the top of the sealing gasket.

[0009] Further, the material of the annular piece is SUS316.

[0010] Further, the diameter of the filter hole is 0.01mm-3mm.

[0011] The utility model has the advantages that by setting an annular piece with filter holes outside the capacitive liquid level sensor, bubbles can be effectively prevented from adhering to the outside of the capacitive liquid level sensor, so that the value detected by the capacitive liquid level sensor is correct and stable, and product defects and scrapping caused by unstable value detected by the capacitive liquid level sensor can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described below with reference to the drawings and in conjunction with embodiments.

[0013] Figure 1 It is a schematic view of bubbles adhering to the capacitive liquid level sensor in the prior art.

[0014] Figure 2 It is a structural schematic view of the palisade device of the utility model.

[0015] Figure 3 It is a structural schematic view of the palisade device of the utility model.

[0016] Explanation of reference numerals in the drawings:

[0017] 1, annular piece; 2, filter hole; 3, sealing gasket; 4, detection end; 5, fixed end. DETAILED DESCRIPTION

[0018] Please refer to Figures 2 to 3 The utility model provides a kind of for the liquid level sensor of color film coating machine palisade device, including the annular piece 1 of being fixed in the outside of capacitive liquid level sensor, the annular piece 1 is equipped with several filter holes 2, capacitive liquid level sensor is composed of detection end 4 and fixed end 5, fixed end 5 is fixed in DIP groove bottom wall, annular piece 1 is fixed above fixed end 5, the height of the annular piece 1 is matched with the height of capacitive liquid level sensor detection end 4.

[0019] Specific, the capacitive liquid level sensor fixedly connected with sealing gasket 3, sealing gasket 3 is connected in the top of fixed end 5, the ring 1 is welded in sealing gasket 3 top.

[0020] Specific, the material of the ring 1 is SUS316. Ring 1 can also be used in other corrosion-resistant materials.

[0021] Specific, the diameter of filter hole 2 is 0.01mm-3mm.

[0022] The fence device of the utility model can also be installed in the roller cleaning tank to prevent the detection end 4 of the capacitive liquid level sensor in the roller cleaning tank from generating air bubbles.

[0023] By setting a ring with filter hole 2 outside the capacitive liquid level sensor, air bubbles can be effectively prevented from adhering to the outside of the capacitive liquid level sensor, so that the value detected by the capacitive liquid level sensor is correct and stable, and product defects and scrapping caused by unstable value detected by the capacitive liquid level sensor can be reduced.

[0024] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that the specific examples described are only illustrative, and are not intended to limit the scope of the utility model, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the utility model should be covered within the scope of the claims of the utility model.

Claims

1. A fence device for a color film coater level sensor, characterized by: The utility model discloses a ring is fixed on the outside of capacitive liquid level sensor, and the ring is provided with a plurality of filter holes, and the height of the ring matches the height of the detection end of the capacitive liquid level sensor.

2. A fence apparatus for a liquid level sensor of a color film coater as defined in claim 1, wherein: The capacitive liquid level sensor is fixedly connected with a sealing gasket, and the ring is welded on the top of the sealing gasket.

3. A fence apparatus for a liquid level sensor of a color film coater as defined in claim 1, wherein: The material of the ring is SUS316.

4. A fence apparatus for a liquid level sensor of a color film coater as defined in claim 1, wherein: The diameter of the filter hole is 0.01mm-3mm.

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