Pipeline bubble detection device before coating

Abstract

The utility model relates to the field of precise coating, in particular to a pipeline bubble detection device before coating. Comprising photoelectric sensors located on the two sides of a nozzle, and the photoelectric sensors are fixed to a light resistance pipeline between the nozzle and a pneumatic valve. The technical problem to be solved by the utility model is to provide the pipeline bubble detection device before coating, and the problems that a part of positions are sprayed to break a film and glue is not uniformly coated in the coating process due to pipeline bubble blockage before coating and bubble flow to a nozzle are solved. The utility model designs the device for detecting the bubbles on the pipelines on the two sides of the nozzle before coating, so that the bubbles can be effectively intercepted and detected in time, and downtime warning can be performed. After the before-spraying pipeline bubble detection devices are installed on the two sides of the nozzle of the high-precision coating machine, bubble generation is effectively and timely detected, the mechanism defect that no real-time inspection tour exists on site is overcome, bubble conditions are timely corresponding, the situation that bubbles flow into the nozzle, and consequently spraying formed films are thin or uneven is avoided, the operation stability of equipment is improved, and quality abnormity is reduced.

Description

Technical Field

[0001] The utility model relates to the field of precision coating, in particular to a pipeline bubble detection device before coating. Background Art

[0002] Slot Die Coating is a high-precision coating method. The coating system mainly includes a feeding unit and a coating unit. The system consists of a coating die that moves precisely relative to the substrate. By controlling the rate, accurately metering and pumping the process fluid, the liquid chemical material is squeezed out from the gap between the left and right dies and coated on the moving substrate (glass) to form a thin film. The coating thickness can be directly calculated from the liquid flow rate and the substrate moving speed. Its advantages are high coating uniformity, a wide range of applicable coating viscosities, fast coating speed, and the ability to produce large-area coatings.

[0003] If bubbles 100 are not detected in time before coating in the photoresist pipeline of the high-precision coating machine, the nozzle 200 will not spray smoothly during coating, which may easily cause abnormal thickness of the product film 300 ( Figure 1 ), abnormal film thickness will lead to abnormal product exposure quality and affect the yield rate. The bubble detection ability of the coating machine pipeline is insufficient, and it is unable to effectively and timely intercept and detect the bubbles before spraying; continuous production or pipeline bending and aging can easily cause bubble accumulation and blockage in the pipeline.

[0004] The original machine end design can only detect the generation of bubbles in the liquid supply pipeline, but cannot detect the generation of bubbles in the spraying section from the nozzle to the pneumatic valve. The pipeline in this section happens to be the last section before photoresist coating and is also the most important section, which leads to uneven coating and continuously affects glass gluing and continuous production, increasing yield and loss. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a pipeline bubble detection device before coating, which solves the problem that bubbles in the pipeline before coating are blocked and bubbles flow to the nozzle, resulting in film breakage and uneven glue coating in some parts of the coating process.

[0006] The utility model is achieved in this way:

[0007] A pipeline bubble detection device before coating comprises photoelectric sensors located on both sides of a nozzle, wherein the photoelectric sensors are fixed on a light-resistance pipeline between the nozzle and a pneumatic valve.

[0008] Furthermore, the photoelectric sensor is electrically connected to the amplifier.

[0009] Furthermore, the amplifier is fixed on a beam above the nozzle.

[0010] Furthermore, the amplifier is connected to the control system via a CC-Link bus.

[0011] Preferably, the control system comprises a computer.

[0012] The advantages of the utility model are: the utility model designs a device for detecting bubbles in the pipelines on both sides of the nozzle before coating, so as to timely and effectively intercept and detect bubbles and give a shutdown warning. After installing the bubble detection device on both sides of the nozzle of the high-precision coating machine before spraying, the generation of bubbles can be effectively and timely intercepted, avoiding the mechanism defect of no real-time inspection on site, responding to the bubble condition in time, avoiding bubbles flowing into the nozzle to cause thin or uneven spraying film, improving the stability of equipment operation and reducing quality abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the prior art.

[0015] Figure 2 It is a structural schematic diagram of the utility model.

[0016] The numbers in the figure are: photoelectric sensor 1, amplifier 2, bubble 100, nozzle 200, membrane 300, and pneumatic valve 400. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The technical solution of the utility model is as follows:

[0020] See also Figure 2As shown, a pipeline bubble detection device before coating of the utility model comprises photoelectric sensors 1 located on both sides of the nozzle 200, and the photoelectric sensors 1 are fixed on the light-resistance pipeline between the nozzle 200 and the pneumatic valve 400. The photoelectric sensors 1 are electrically connected to the amplifier 2.

[0021] In a specific embodiment, the required elements are as follows:

[0022] (1) Photoelectric sensor*2 Model: FD-F41-M5T;

[0023] (2) Photoelectric amplifier*2 Model: FX-501-C2;

[0024] (3) Mitsubishi extended version CC-Link*1.

[0025] Installation method:

[0026] The photoelectric sensor 1 is installed on the light resistance pipe before the spraying on both sides of the nozzle 200 and fastened with a cable tie; the AMP 2 of the photoelectric sensor 1 (the two amplifiers are placed side by side from top to bottom, and the wiring method of the signal line is determined according to the product specification. The sensor's connecting cable is inserted into the input port of the amplifier in a conventional way, and the cable is not shown in the figure) is fixed on the original nozzle beam 500 and matched with the expanded version of CC-Link (not shown in the figure) for communication wiring.

[0027] Directions:

[0028] ①Install photoelectric sensor 1 according to the distribution position of the original photoresistance pipeline;

[0029] ② Select the pipeline between the nozzle 200 and the pneumatic valve 400 before spraying;

[0030] ③ The sensor amplifier 2 is installed in a position where there is no actuation interference with the mechanism;

[0031] ④Replace the expansion board CC-Link and connect it to the detection signal line of the original mechanism.

[0032] The bubble detection device of the utility model is installed on both sides of the high-precision coating nozzle, and the installation position is adjusted according to the distribution position of the original photoresist pipeline to meet the installation requirements of different on-site organizations, achieve the function of interception and warning, and effectively and timely avoid the phenomenon of uneven coating.

[0033] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A pipeline bubble detection device before coating, characterized in that: It includes photoelectric sensors located on both sides of the nozzle, the photoelectric sensors are fixed on the light resistance pipeline between the nozzle and the pneumatic valve; the photoelectric sensors are electrically connected to the amplifier; the amplifier is fixed on the beam above the nozzle; the amplifier is connected to the control system through the CC-Link bus; the control system includes a computer.

Images