Automatic emptying device and coating machine

Abstract

The utility model discloses an automatic emptying device and a coating machine, and the automatic emptying device comprises an emptying body which is arranged on a coating die head and is provided with an emptying cavity, and an inlet and an outlet which are communicated with the emptying cavity; the inlet is communicated with the cavity, and the outlet is communicated with the outside or external equipment; the pressure detection piece is arranged on the emptying body, the detection end of the pressure detection piece is located between the inlet and the outlet, and the pressure detection piece is used for detecting the pressure of the emptying cavity; the projection of the outlet in the horizontal direction and the projection of the detection end of the pressure detection piece in the horizontal direction are staggered. The first switch valve is arranged on the emptying body and is positioned at the downstream of the pressure detection piece; the first switch valve is in communication connection with the pressure detection part and used for controlling the emptying cavity to be opened or closed. The technical problems that according to an existing emptying device, the emptying time is difficult to determine, slurry is wasted due to the fact that the emptying time is too long, the coating quality problem is caused due to the fact that air in the slurry is not completely exhausted due to the fact that the emptying time is short, and the accuracy is poor are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of coating machines and coating machine accessories, specifically to an automatic evacuation device and a coating machine. Background Technology

[0002] In industrial coating processes, the coating die is a critical piece of equipment. Many products in industrial production require high-precision, high-quality coatings, such as circuit boards in electronic devices, optical films for displays, and lithium battery electrodes. These coatings must not only have uniform thickness but also ensure surface smoothness and freedom from defects. Air entering the coating die can negatively impact these quality indicators.

[0003] In related technologies, a venting device is usually installed on the coating die head. The venting device is connected to the cavity of the coating die head. The venting device generally includes a switch valve. By setting the switch valve at the venting port connected to the cavity of the coating die head, venting is carried out by controlling the opening and closing of the switch valve. The venting situation is usually determined based on time. However, the venting time is difficult to determine. If the venting time is too long, it will cause waste of slurry. If the venting time is too short, the air in the slurry will not be completely removed, which will cause coating quality problems. The accuracy of venting is also poor. Utility Model Content

[0004] This utility model provides an automatic evacuation device and a coating machine, which solves the technical problems of existing evacuation devices, such as difficulty in determining the evacuation time, waste of slurry due to excessive evacuation time, and poor coating quality and accuracy due to insufficient air removal in the slurry when the evacuation time is too short.

[0005] In a first aspect, this utility model provides an automatic evacuation device for evacuating a coating die head, wherein the coating die head has a cavity for slurry flow, and the automatic evacuation device includes:

[0006] The venting body is disposed on the coating die head and has a venting cavity and an inlet and an outlet communicating with the venting cavity; the inlet is communicating with the cavity and the outlet is used to communicate with the outside or external equipment.

[0007] A pressure detection element is disposed on the venting body, and the detection end of the pressure detection element is located between the inlet and the outlet, for detecting the pressure of the venting cavity; the projection of the outlet in the horizontal direction is offset from the projection of the detection end of the pressure detection element in the horizontal direction.

[0008] A first switching valve is disposed on the venting body and located downstream of the pressure detection element; the first switching valve is communicatively connected to the pressure detection element and is used to control the venting cavity to open or close.

[0009] In an alternative embodiment, the first switch valve comprises a driving member, a valve rod and a sealing part; the driving member is in communication connection with the pressure detecting member; a valve cavity is communicated with the emptying cavity in the emptying body; one end of the valve rod is connected with the output end of the driving member, and the other end extends into the valve cavity and is connected with the sealing part; the sealing part is adapted to the communication between the valve cavity and the inlet; the sealing part is driven by the driving member to move close to or away from the communication between the valve cavity and the inlet, so as to close or open the communication between the valve cavity and the inlet.

[0010] In an alternative embodiment, the valve rod is connected with the output end of the driving member through a set screw.

[0011] In an alternative embodiment, the pressure detecting member is a pressure sensor.

[0012] In an alternative embodiment, the coating die is provided with an emptying port communicated with the cavity, the emptying body is provided with an emptying pipeline in threaded connection with the emptying port, and the inlet is located on the emptying pipeline.

[0013] In an alternative embodiment, the outlet is provided with a second switch valve for controlling the closure or opening of the outlet.

[0014] In an alternative embodiment, the second switch valve is a ball valve.

[0015] In a second aspect, the utility model also provides a coating machine, including coating die and at least one automatic emptying device of any one of the first aspect, the automatic emptying device sets up on the coating die, and the dynamic emptying device is communicated with the cavity of the coating die, and is used for emptying the cavity of the coating die.

[0016] In an alternative embodiment, two automatic emptying devices are provided, and the two automatic emptying devices are respectively communicated with two ends of the cavity.

[0017] The utility model technical scheme has the following advantages:

[0018] The utility model detects the pressure information of the emptying cavity in real time through the pressure sensor, so as to accurately feedback the emptying effect, effectively quantize the emptying time, avoid the waste of slurry caused by too long emptying time, and avoid the coating quality problem caused by the incomplete emptying of air in slurry due to too short emptying time, ensure the emptying effect and coating quality, and improve the control precision; meanwhile, the first switch valve and the pressure sensor are used to realize automatic control, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure schematic view of the automatic emptying device provided by the present application at a first perspective view;

[0021] Figure 2 The structure schematic view of the automatic emptying device provided by the present application at a first perspective view; Figure 1

[0022] Figure 3 The structure schematic view of the automatic emptying device provided by the present application at a second perspective view;

[0023] Figure 4 The structure schematic view of the coating machine provided by the present application at a third perspective view;

[0024] Figure 5 The structure schematic view of the coating machine provided by the present application at a third perspective view; Figure 4

[0025] Figure 6 The structure schematic view of the coating machine provided by the present application at a fourth perspective view.

[0026] Explanation of reference signs:

[0027] 1, coating die; 2, cavity; 3, emptying body; 4, inlet; 5, outlet; 6, pressure detection piece; 7, first on-off valve; 71, driving piece; 72, valve rod; 73, sealing part; 8, valve cavity; 9, emptying port; 10, second on-off valve. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0029] ​​In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the utility model, it needs to explain, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0032] The embodiments of the utility model are described below in combination with Figures 1 to 6 .

[0033] According to the embodiments of the utility model, on the one hand, an automatic emptying device is provided, which is applied to the emptying of a coating die 1, the coating die 1 has a cavity 2 for slurry flow, and the automatic emptying device comprises: an emptying body 3 arranged on the coating die 1, having an emptying cavity, an inlet 4 and an outlet 5 communicated with the emptying cavity; the inlet 4 is communicated with the cavity 2, and the outlet 5 is used for communicating with the outside or external equipment; a pressure detection piece 6 is arranged on the emptying body 3, and the detection end of the pressure detection piece 6 is located between the inlet 4 and the outlet 5, used for detecting the pressure of the emptying cavity; the projection of the outlet 5 along the horizontal direction is staggered with the projection of the detection end of the pressure detection piece 6 along the horizontal direction; a first on-off valve 7 is arranged on the emptying body 3 and located downstream of the pressure detection piece 6; the first on-off valve 7 is in communication connection with the pressure detection piece 6, used for controlling the emptying cavity to be conducted or closed.

[0034] It needs to be explained that the coating die 1 has a feeding port communicated with the cavity 2, and the slurry is transported through the feeding port.

[0035] In this embodiment, when it is necessary to empty the coating die 1, the outlet 5 of the emptying body is connected to an external device to recover the slurry, then the first switch valve 7 is controlled to open, so that the outlet 5 and the inlet 4 on the emptying body 3 are communicated, the slurry is transported into the cavity 2, the slurry gradually fills in the cavity 2 and extrudes the air from the cavity 2 to the inlet 4, the air flows from the inlet 4 into the emptying cavity and is discharged from the outlet 5 after passing through the pressure detecting piece 6 and the first switch valve 7 in turn; when the cavity 2 is filled with the slurry, then the slurry carrying the air flows through the inlet 4, the emptying cavity and the outlet 5 in turn; during the emptying process, the projection of the outlet 5 along the horizontal direction is staggered with the projection of the detection end of the pressure detecting piece 6 along the horizontal direction, so that the contact area of the detection end of the pressure detecting piece 6 in the emptying cavity can be completely immersed in the slurry when the slurry flows out, the pressure detecting piece 6 detects the pressure in the emptying cavity in real time and feeds back the detected pressure information to the first switch valve 7, during the detection process, the pressure value gradually rises and tends to be stable, and the feeding speed of the feeding port is controlled to be equivalent to the speed during coating, at the same time, the pressure threshold value and the deviation value are set by program; when the change of the pressure value continuously detected by the pressure detecting piece 6 is within the deviation range of the pressure threshold value within the preset time, it is indicated that the bubbles in the cavity 2 have been basically emptied, at this time, the feeding speed can be gradually reduced and the feeding can be stopped to avoid the bubbles flowing back or remaining due to sudden pressure reduction, after the feeding is stopped, the first switch valve 7 is controlled to close, the emptying is completed, the pressure information of the emptying cavity is detected by the pressure detecting piece 6 in real time to accurately feed back the emptying effect, the emptying time is effectively quantized, the waste of the slurry caused by too long emptying time is avoided, at the same time, the problem of coating quality caused by the air in the slurry not being completely emptied due to too short emptying time is avoided, the emptying effect and the coating quality are ensured, and the control precision and the automation degree are improved.

[0036] Specifically, the position of the outlet 5 is higher than the position of the detection end of the pressure detecting piece 6, so that the contact area of the detection end of the pressure detecting piece 6 in the emptying cavity can be completely immersed in the slurry when the slurry flows out.

[0037] In one embodiment, as shown in Figures 1 to 3 The first switch valve 7 includes a driving piece 71, a valve rod 72 and a sealing part 73; the driving piece 71 is communicatively connected with the pressure detecting piece 6; a valve cavity 8 is communicated with the path of the emptying cavity in the emptying body 3; one end of the valve rod 72 is connected with the output end of the driving piece 71, the other end extends into the valve cavity 8 and is connected with the sealing part 73; the sealing part 73 is adapted to the communication between the valve cavity 8 and the inlet 4; the sealing part 73 is driven by the driving piece 71 to move close to or away from the communication between the valve cavity 8 and the inlet 4, so as to close or open the communication between the valve cavity 8 and the inlet 4.

[0038] It should be noted that the valve rod 72 is sealingly and slidingly connected with the emptying body 3.

[0039] In the embodiment, the valve rod 72 is driven to slide on the emptying body 3 by the driving member 71, when the driving valve rod 72 is away from the communication between the valve cavity 8 and the inlet 4 by a preset distance, the communication between the valve cavity 8 and the inlet 4 is open, the slurry can enter the valve cavity 8 from the inlet 4, and then be discharged from the outlet 5, so as to realize the emptying; when the driving valve rod 72 is close to the communication between the valve cavity 8 and the inlet 4, and abuts against the communication between the valve cavity 8 and the inlet 4 through the sealing part 73, the communication between the valve cavity 8 and the inlet 4 is closed, and the emptying is completed, which is convenient and fast, and the automatic control is realized through the pressure detecting member 6 and the driving member 71.

[0040] Specifically, the position of the communication between the valve cavity 8 and the inlet 4 is higher than the position of the detection end of the pressure detecting member 6, and the position of the outlet 5 is higher than the position of the communication between the valve cavity 8 and the inlet 4, so as to ensure that the slurry flows upward, so that the detection end of the pressure detecting member 6 is completely immersed in the contact area in the emptying cavity, and the air is easily discharged.

[0041] In one embodiment, as shown in Figure 2 The valve rod 72 is connected with the output end of the driving member 71 through a set screw.

[0042] In the embodiment, the valve rod 72 is connected with the output end of the driving member 71 through a set screw, which is convenient for installation and maintenance.

[0043] Specifically, the driving member 71 is a telescopic motor.

[0044] In one embodiment, the pressure detecting member 6 is a pressure sensor.

[0045] It should be noted that the detection end of the pressure sensor extends into the emptying cavity.

[0046] In the embodiment, the pressure detecting member 6 adopts a pressure sensor for detection, because the first on-off valve 7 is located downstream of the pressure detecting member 6, so that the slurry flows through the emptying cavity to immerse the contact area of the pressure sensor, when the bubbles accumulated on the edge of the cavity 2 are taken out by the flowing slurry, the pressure sensor will change greatly, and a clear fluctuation point will appear in the pressure-time curve, the larger the bubble, the larger the fluctuation range, thus, according to the above characteristics, it is determined that the emptying is completed when the pressure value fluctuates in the deviation value range of the pressure threshold value within the preset time, so as to realize the precise control.

[0047] In one embodiment, as shown in Figure 5 The coating die 1 is provided with an emptying port 9 communicating with the cavity 2, the emptying body 3 is provided with an emptying pipeline screw-connected with the emptying port 9, and the inlet 4 is located on the emptying pipeline.

[0048] In the embodiment, the emptying main body is threadedly connected with the emptying port 9 through the emptying pipeline, facilitating installation and disassembly.

[0049] In one embodiment, as shown in Figure 2 and Figure 3 The outlet 5 is provided with a second switch valve 10 for controlling the outlet 5 to be closed or opened.

[0050] In the embodiment, when the first switch valve 7 fails to be completely closed, the second switch valve 10 can be used for closing, so as to ensure that the emptying cavity can be closed in time, avoid slurry leakage, and improve safety.

[0051] In one embodiment, the second switch valve 10 is a ball valve.

[0052] In the embodiment, the second switch valve 10 is a ball valve, which can ensure that the emptying cavity can be closed in time, avoid slurry leakage, and improve safety.

[0053] Specifically, the first switch valve 7 is communicatively connected with the pressure detection member 6 through an external control system, so as to facilitate automatic control.

[0054] The specific working principle of the automatic emptying device provided in the embodiment is as follows: when it is necessary to empty the coating die head 1, the outlet 5 of the emptying main body is connected to an external device to recover the slurry, then the sealing part 73 is driven away from the communication part of the inlet 4 and the valve cavity 8 by the driving part 71, so that the emptying cavity is open, then the slurry is delivered into the cavity 2, the slurry gradually fills in the cavity 2 and extrudes the air from the cavity 2 to the inlet 4, the air flows from the inlet 4 into the emptying cavity and is discharged from the outlet 5 after passing through the pressure sensor and the first on-off valve 7 in sequence; after the cavity 2 is filled with the slurry, the slurry carrying the air flows through the inlet 4, the emptying cavity and the outlet 5 in sequence; during the emptying process, the pressure sensor detects the pressure in the emptying cavity in real time and feeds back the detected pressure information to the driving part 71, during the detection process, the pressure value gradually rises and tends to be stable, and the feeding speed of the feeding port is controlled to be equivalent to the speed during coating, at the same time, the pressure threshold value and the deviation value are set by the program; when the change of the pressure value detected by the pressure sensor continuously in the preset time, preferably 10 to 15 minutes, is within the deviation range of the pressure threshold value, preferably ±1% of the sensor range, it is indicated that the bubbles in the cavity 2 have been basically emptied, at this time, the feeding speed can be gradually reduced and the feeding can be stopped to avoid the bubbles flowing back or remaining due to sudden pressure reduction, after the feeding is stopped, the driving part 71 is controlled to drive the sealing part 73 to abut against the communication part of the inlet 4 and the valve cavity 8 to close the emptying cavity, if it cannot be effectively closed, it is closed by the ball valve to complete the emptying. The automatic emptying device provided in the embodiment detects the pressure information of the emptying cavity in real time by the pressure sensor, so as to accurately feed back the emptying effect, effectively quantify the emptying time, avoid waste of the slurry due to too long emptying time, and avoid coating quality problems caused by incomplete emptying of the air in the slurry due to too short emptying time, ensure the emptying effect and coating quality, and improve the control precision; the automatic control is realized by the first on-off valve 7 and the pressure sensor, and the production efficiency is improved; the second on-off valve 10 is used to ensure that the emptying cavity can be completely closed after the emptying is completed, so as to avoid waste caused by slurry leakage, and the technical problem of poor accuracy that the emptying time of the existing emptying device is difficult to determine, too long emptying time will cause waste of the slurry, and too short emptying time will cause coating quality problems caused by incomplete emptying of the air in the slurry is solved.

[0055] According to the embodiments of the utility model, as shown in Figures 1 to 6 On the other hand, a coating machine is also provided, which comprises a coating die head 1 and at least one automatic emptying device according to any one of the embodiments of the first aspect; the automatic emptying device is arranged on the coating die head 1 and communicates with the cavity 2 of the coating die head 1, and is used for emptying the cavity 2 of the coating die head 1.

[0056] In the embodiment, the coating machine is provided with the automatic emptying device of any one of the first aspect, and the specific structure of the automatic emptying device is the same as that of any one of the first aspect, so that the coating machine provided with the automatic emptying device has at least the same technical effect as the automatic emptying device, and the specific principle is the same as any one of the first aspect, which will not be repeated here.

[0057] In one embodiment, as shown in Figure 4 and Figure 6 Two automatic emptying devices are provided, and the two automatic emptying devices are respectively communicated with two ends of the cavity 2.

[0058] In the embodiment, two automatic emptying devices are provided, and are respectively communicated with two ends of the cavity 2, so as to improve the emptying effect and speed.

[0059] Specifically, the automatic emptying device is arranged at the top of the coating die 1 and is communicated with the top of the cavity 2, so as to discharge air and improve the emptying effect.

[0060] In one embodiment, the coating machine further comprises a control system; the coating die 1 is provided with a feeding port communicated with the cavity 2 and a feeding pump communicated with the feeding port, so as to convey the material; the automatic emptying device and the feeding pump are both in communication connection with the control system.

[0061] The specific working process of the coating machine in this embodiment is as follows: first, the pump speed of the initial feeding pump is set to half of the normal coating pump speed to prevent high pressure from causing bubbles to disperse or remain in dead corners; when the pressure sensor of the automatic emptying device shows a reading, the control system gradually increases the pump speed of the feeding pump to the same pump speed as the normal coating pump speed within 30 seconds, the pressure sensor detects the pressure in the emptying cavity in real time and forms a pressure curve, at this time the pressure curve gradually rises until it is stable, if there is a large fluctuation during this period, it means that there are more bubbles; when the pump speeds are the same, the control system monitors the pressure curve in real time, when the pressure fluctuation is reduced to the set range (within ±1% of the sensor range) and remains stable, start timing for 10 minutes, during which the pump speed of the feeding pump remains unchanged and continues to run; the control system records and analyzes the pressure curve, if the pressure fluctuation does not exceed the set range within 10 minutes, it is considered that the required emptying effect for normal coating has been reached, otherwise, increase the monitoring time by 1 minute until the pressure fluctuation does not exceed the set range within the monitoring time. If the pressure fluctuation still cannot be stabilized within the set range after 5 times of increase, a warning is issued to check whether the slurry has completed bubble removal and whether the pressure sensor is working normally; when the pressure value reaches the condition that the pressure fluctuation does not exceed the set range within the monitoring time, the control system gradually reduces the pump speed of the feeding pump to zero within 30 seconds, after stopping, the control system controls the first on-off valve 7 to close, ending the emptying process and saving time and energy; when the feeding pump stops working, if the electric on-off valve cannot normally close the valve, the ball valve needs to be manually closed before the coating work starts to prevent pressure relief during the coating process. It should be noted that the monitoring time and the monitored pressure threshold can be set according to specific conditions (such as using slurry with different viscosities).

[0062] Obviously, the above embodiments are only examples for the purpose of clarity, and are not limiting of the embodiments. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to exhaust all embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. An automatic venting device, characterized in that, An automatic evacuation device is used to ventilate a coating die (1), wherein the coating die (1) has a cavity (2) for slurry flow, and the automatic venting device includes: The venting body (3) is disposed on the coating die head (1) and has a venting cavity and an inlet (4) and an outlet (5) communicating with the venting cavity; the inlet (4) is communicating with the cavity (2) and the outlet (5) is used to communicate with the outside world or external equipment; A pressure detection element (6) is disposed on the venting body (3), and the detection end of the pressure detection element (6) is located between the inlet (4) and the outlet (5) for detecting the pressure of the venting cavity; the projection of the outlet (5) in the horizontal direction is offset from the projection of the detection end of the pressure detection element (6) in the horizontal direction. A first switching valve (7) is disposed on the venting body (3) and located downstream of the pressure detection element (6); the first switching valve (7) is communicatively connected to the pressure detection element (6) and is used to control the venting cavity to open or close.

2. The automatic evacuation device according to claim 1, characterized in that, The first switching valve (7) includes a drive (71), a valve stem (72), and a sealing part (73); the drive (71) is communicatively connected to the pressure detection element (6); a valve chamber (8) is connected to the venting body (3) along the path of the venting cavity; one end of the valve stem (72) is connected to the output end of the drive (71), and the other end slides into the valve chamber (8) and is connected to the sealing part (73); the connection between the valve chamber (8) and the inlet (4) is adapted to the sealing part (73); the sealing part (73) is driven by the drive (71) to move closer to or away from the connection between the valve chamber (8) and the inlet (4) to close or open the connection between the valve chamber (8) and the inlet (4).

3. The automatic emptying device according to claim 2, characterized in that, The valve stem (72) is connected to the output end of the drive unit (71) by a set screw.

4. The automatic emptying device according to claim 1, characterized in that, The pressure detection element (6) is a pressure sensor.

5. The automatic evacuation device according to claim 1, characterized in that, The coating die head (1) is provided with an air vent (9) communicating with the cavity (2), and the air vent body (3) is provided with an air vent pipe that is threadedly connected to the air vent (9), and the inlet (4) is located on the air vent pipe.

6. The automatic evacuation device according to any one of claims 1 to 5, characterized in that, The outlet (5) is provided with a second switching valve (10), which is used to control the outlet (5) to close or open.

7. The automatic evacuation device according to claim 6, characterized in that, The second switching valve (10) is a ball valve.

8. A coating machine, characterized in that, It includes a coating die (1) and at least one automatic evacuation device as described in any one of claims 1 to 7; the automatic evacuation device is disposed on the coating die (1) and the automatic evacuation device is connected to the cavity (2) of the coating die (1) for evacuating the cavity (2) of the coating die (1).

9. The coating machine according to claim 8, characterized in that, Two automatic venting devices are provided, and the two automatic venting devices are respectively connected to both ends of the cavity (2).

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