Protective device of coating head

Abstract

The utility model discloses a protective device of a coating head in the technical field of coating protection, the coating head comprises a first surface and a second surface which are opposite to each other, the first surface and the second surface are both perpendicular to the advancing direction of the coating operation, and the first surface is opposite to the second surface and is positioned in the advancing direction of the coating operation; the distance between the die lip of the coating head and the base plate is greater than the distance between the protective device and the base plate; in addition, the protection device comprises a protection plate, and the protection plate is arranged on the first face; and the foreign matter detection assembly is arranged on the protection plate. According to the protective device disclosed by the utility model, a preposed protection mechanism can be carried out on the coating head, so that the damage risk of the coating head is reduced, and the service life of the coating head is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of coating protection, in particular to a protection device for a coating head. Background Art

[0002] In modern manufacturing, slit coating technology has been widely used in flat panel display manufacturing, semiconductor chip packaging, and emerging perovskite solar cells due to its advantages of high precision and high uniformity. As the core component of slit coating technology, the coating head has become one of the key and expensive components in the entire production line due to its extremely high precision requirements (such as a straightness of 3um / m) and complex manufacturing process. However, despite the precise design of the coating head, it still faces many challenges in the actual production environment, especially the complexity and uncertainty of the operating environment.

[0003] In actual production, coating heads often need to operate at high speeds and with high precision, while facing unforeseen challenges such as foreign matter remaining on the substrate surface and dust accumulation between the suction cup and the substrate. These extreme operating conditions can easily lead to collisions between the coating head and foreign matter. This can cause minor damage to the coating head, affecting coating quality, or even serious damage or even destruction, resulting in significant financial losses and the risk of production line downtime for the company.

[0004] Currently, there are some solutions on the market for coating head protection, such as installing a protective plate in front of the coating head and placing a vibration sensor above the coating machine gantry. When vibration is detected, the system responds quickly and shuts down the machine, thus preventing further damage to the coating head. However, this solution has some limitations in practical application:

[0005] Sensitivity and misjudgment issues: Due to the varying degrees of severity of collisions, sometimes the vibration signal generated by a minor collision is not sufficient to trigger the sensor, resulting in the coating head possibly being damaged unnoticed. Conversely, when the coating machine gantry accelerates too much, even if no actual collision occurs, the vibration sensor may misjudge it as a collision signal, causing unnecessary downtime and affecting production efficiency.

[0006] Compatibility issues: In a production environment that pursues high speed and high efficiency, the acceleration and deceleration of the coating machine gantry are often large, which requires the protective device to be able to accurately distinguish between acceleration changes in normal operation and real collision events to avoid production interruptions caused by misjudgment.

[0007] Limited protection effect: Although traditional protective plates can block the direct impact of large foreign particles to a certain extent, their protection effect on fine dust or particles is limited. Moreover, after long-term use, the protective plates themselves may become a new source of pollution or wear.

[0008] In order to solve at least one of the above problems, the present invention provides a protective device for a coating head. Utility Model Content

[0009] The purpose of the utility model is to provide a protective device for a coating head, which can realize a pre-protection mechanism for the coating head, reduce the risk of damage to the coating head, and extend its service life.

[0010] The purpose of this utility model is achieved by the following technical solutions:

[0011] The utility model provides a protective device for a coating head, the coating head comprising:

[0012] A first surface and a second surface facing each other, wherein the first surface and the second surface are both perpendicular to a direction of travel of the coating operation, and the first surface is located in the direction of travel of the coating operation relative to the second surface;

[0013] The distance between the die lip of the coating head and the substrate is greater than the distance between the protective device and the substrate;

[0014] The protective device comprises:

[0015] a protective plate, the protective plate being arranged on the first surface;

[0016] A foreign object detection component is arranged on the protective plate.

[0017] Furthermore, the foreign body detection component includes:

[0018] A first sensor and a second sensor are provided on the protection plate.

[0019] Furthermore, the protective plate includes: a first side and a second side opposite to each other, the first side and the second side are both perpendicular to the direction of travel of the coating operation, and the first side is located in the direction of travel of the coating operation relative to the second side;

[0020] The first sensor is disposed on the first side.

[0021] Furthermore, the distance between them is greater than or equal to a first threshold and less than or equal to a second threshold;

[0022] The second threshold is greater than or equal to the first threshold.

[0023] Furthermore, the protective plate includes: a first top surface and a first bottom surface facing each other, wherein the distance between the first top surface and the substrate is greater than the distance between the first bottom surface and the substrate;

[0024] The second sensor is disposed on the first bottom surface.

[0025] Furthermore, the distance between the second sensor and the substrate is greater than or equal to a first threshold.

[0026] Furthermore, the distance between the die lip of the coating head and the substrate is greater than the distance between the second sensor and the substrate.

[0027] Furthermore, a difference between a distance between a die lip of the coating head and the substrate and a distance between the second sensor and the substrate is greater than or equal to a third threshold.

[0028] Furthermore, the first sensor and the second sensor are both thin film pressure sensors;

[0029] Furthermore, the foreign body detection component includes:

[0030] An alarm is connected to the first sensor and the second sensor.

[0031] Furthermore, the protective plate is perpendicular to the base plate;

[0032] The coating head comprises:

[0033] an upper mold assembly connected to the protective plate;

[0034] The lower mold assembly includes a second top surface, a second bottom surface, and a side surface. The second top surface is connected to the upper mold assembly. A mold lip is provided on the second bottom surface. The angle formed by the side surface and the substrate is an acute angle, and a protective space is formed between the side surface and the protective plate.

[0035] Compared with the prior art, the beneficial effects of the present invention include at least:

[0036] The utility model sets the protective plate directly on the first surface of the coating head, and this position is exactly in the forward direction of the coating operation. Therefore, it can effectively block the direct impact of splashes, particles, dust and other foreign objects from the forward direction on the coating head, thereby realizing a front protection mechanism for the coating head, reducing the risk of damage to the coating head and extending its service life.

[0037] By setting the distance between the protective device and the substrate to be smaller than the distance between the die lip and the substrate, the utility model can monitor in real time whether there are foreign objects in the area in front of the coating head. Once a foreign object is found approaching, an alarm is immediately issued or corresponding protective measures (such as suspending the coating operation, adjusting coating parameters, etc.) are triggered. It can also ensure that the protective plate can serve as the first line of defense and contact possible foreign objects before the die lip, thereby protecting the die lip from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1It is a schematic structural diagram of the protective device of the coating head according to an embodiment of the present utility model.

[0039] Figure 2 It is a structural schematic diagram of the protective device of the coating head when there are foreign objects on the substrate of an embodiment of the present utility model.

[0040] Figure 3 It is a structural schematic diagram of the protective device of the coating head when there is foreign matter and dust under the suction cup of an embodiment of the utility model.

[0041] In the figure: 10, coating head; 101, die lip; 102, upper die assembly; 1021, first surface; 1022, second surface; 103, lower die assembly; 1031, side; 1032, protective space; 20, protective plate; 201, first top surface; 202, first bottom surface; 203, first side; 204, second side; 30, foreign matter detection assembly; 301, first sensor; 302, second sensor; 40, substrate; 401, foreign matter block; 402, protrusion; 50, suction cup; 501, foreign matter dust. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0043] The words expressing positions and directions described in this utility model are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of this utility model.

[0044] The coating head 10 of the present invention includes an upper mold assembly 102 and a lower mold assembly 103. The upper mold assembly 102 includes a third top surface and a third bottom surface opposite to each other, and a first surface 1021 and a second surface 1022 opposite to each other. Furthermore, the third top surface and the third bottom surface are parallel to the forward direction of the coating operation, the first surface 1021 and the second surface 1022 are perpendicular to the forward direction of the coating operation, and the first surface 1021 is located in the forward direction of the coating operation relative to the second surface 1022. For example, when the forward direction of the coating operation is from left to right, the first surface 1021 is arranged on the right side of the second surface 1022. In addition, the lower mold assembly 103 includes a second top surface, a second bottom surface, and a side surface 1031. Furthermore, the second top surface is connected to the third bottom surface, a die lip 101 is provided on the second bottom surface, a first end of the side surface 1031 is connected to the second top surface, and a second end of the side surface 1031, which is arranged opposite to the first end, is connected to the second bottom surface.

[0045] In order to implement a pre-protection mechanism for the coating head 10, reduce the risk of damage to the coating head 10, and extend its service life, the present invention provides a protective device on the first surface 1021 of the upper mold assembly 102. Figure 1 The angle formed by the side surface 1031 and the substrate 40 is an acute angle, and a protective space 1032 is formed between the side surface 1031 and the protective device.

[0046] In order to monitor the presence of foreign matter in the area in front of the coating head 10 in real time and to ensure that the protective device can serve as a first line of defense, contacting any foreign matter before the die lip 101, thereby protecting the die lip 101 from damage, the distance between the protective device and the substrate 40 is set to be smaller than the distance between the die lip 101 and the substrate 40.

[0047] Specifically, the protective device of the coating head 10 of the present invention includes: a protective plate 20 and a foreign matter detection assembly 30. The foreign matter detection assembly 30 is arranged on the protective plate 20, and the protective plate 20 is arranged on the first surface 1021. Furthermore, the upper part of the protective plate 20 is installed on the first surface 1021, and the lower part of the protective plate 20 is freely suspended above the substrate 40, and the protective plate 20 is perpendicular to the substrate 40. It can be seen that the angle formed by the side surface 1031 and the substrate 40 is an acute angle, and a protective space 1032 is formed between the side surface 1031 and the lower part of the protective plate 20, which can ensure that the foreign matter detection assembly 30 will not interfere with the normal operation of the die lip 101 during the monitoring process, and at the same time can effectively detect foreign matter close to the die lip 101.

[0048] In order to improve the automation level of the coating operation and reduce the labor intensity of the operators, the foreign body detection component 30 of the utility model includes: a first sensor 301, a second sensor 302 and an alarm. Among them, the first sensor 301 and the second sensor 302 are both arranged on the protective plate 20. Specifically, the first sensor 301 and the second sensor 302 are both thin film pressure sensors, which are respectively arranged at different positions of the protective plate 20, and can provide more detection points and detection angles, thereby enhancing the monitoring ability of the protective device for foreign bodies. The output ends of the first sensor 301 and the second sensor 302 are both connected to the alarm. During application, once the first sensor 301 and the second sensor 302 detect foreign bodies in the detection area, the alarm will be immediately triggered to sound an alarm, thereby triggering corresponding protective measures, such as: suspending the coating operation, adjusting the coating parameters, etc., which can significantly reduce the risk of safety accidents caused by the intrusion of foreign bodies and ensure the safety of operators and equipment.

[0049] The protective plate 20 of the present invention includes: a first side 203 and a second side 204 opposite to each other, and a first top surface 201 and a first bottom surface 202 opposite to each other. The first side 203 and the second side 204 are both perpendicular to the direction of travel of the coating operation, and the first side 203 is located in the forward direction of the coating operation relative to the second side 204. For example, when the forward direction of the coating operation is from left to right, the first side 203 is arranged on the right side of the second side 204. In addition, the distance between the first top surface 201 and the substrate 40 is greater than the distance between the first bottom surface 202 and the substrate 40. Furthermore, the first sensor 301 is arranged on the first side 203. When used, the first sensor 301 is arranged on the lower part of the first side 203, that is, in the forward direction of the coating operation, so that the first sensor 301 can detect approaching foreign objects earlier, thereby improving the lateral detection capability. Furthermore, the second sensor 302 is disposed on the first bottom surface 202, allowing the second sensor 302 to be closer to the substrate 40 for monitoring, thereby improving the longitudinal detection capability. Thus, the first sensor 301 and the second sensor 302 can detect foreign objects in different directions, respectively, thereby improving the sensitivity and accuracy of detection.

[0050] To ensure that each sensor can operate effectively within an appropriate distance range, neither too close to the substrate 40 to cause false alarms nor too far away from the substrate 40 to reduce detection effectiveness, the distance between the first sensor 301 of the present invention and the substrate 40 is greater than or equal to a first threshold and less than or equal to a second threshold; the distance between the second sensor 302 and the substrate 40 is greater than or equal to the first threshold d2. The second threshold and the first threshold d2 are both greater than 0, and the second threshold is greater than or equal to the first threshold d2.

[0051] In addition, in order to ensure that the second sensor 302 can effectively detect foreign objects approaching the die lip 101 and at the same time will not affect the accuracy and quality of the coating operation, the present invention clarifies the relative positional relationship between each sensor and the die lip 101. The distance between the die lip 101 of the coating head 10 and the substrate 40 is greater than the distance between the second sensor 302 and the substrate 40. Furthermore, the difference between the distance between the die lip 101 of the coating head 10 and the substrate 40 and the distance between the second sensor 302 and the substrate 40 is greater than or equal to a third threshold d1. The third threshold d1 is greater than 0. When applied, the distance between the first sensor 301 and the substrate 40 is greater than the distance between the second sensor 302 and the substrate 40. In actual application, the distance between the second sensor 302 and the substrate 40 is 0 to 100 μm, ensuring that the second sensor 302 can work effectively within an appropriate distance range, neither too close to the substrate 40 to cause false alarms, nor too far away from the substrate 40 to reduce the detection effect.

[0052] refer to Figure 2There is a foreign object block 401 on the substrate 40. When the coating operation moves from left to right, the first sensor 301 collides with the foreign object block 401. The first sensor 301 detects a collision signal, the alarm device sends an alarm signal, and stops the machine, thereby protecting the coating head 10.

[0053] refer to Figure 3 When there is foreign dust 501 between the substrate 40 and the suction cup 50, after the suction cup 50 adsorbs the substrate 40, the foreign dust 501 causes the substrate 40 to bulge 402. When the coating operation moves from left to right, the second sensor 302 collides with the bulge 402. The second sensor 302 detects a collision signal, the alarm sends an alarm signal, and the machine stops, thereby protecting the coating head 10.

[0054] Since the first sensor 301 and the second sensor 302 are both thin film pressure sensors, when the device uses excessive acceleration, no collision signal is triggered. Therefore, compared with vibration sensors, thin film pressure sensors can detect slight collisions and avoid false triggering of alarm information caused by acceleration.

[0055] In summary, the present invention sets the protective plate 20 directly on the first surface 1021 of the coating head 10. This position is exactly in the forward direction of the coating operation. Therefore, it can effectively block the direct impact of splashes, particles, dust and other foreign objects from the forward direction on the coating head 10, thereby realizing a pre-protection mechanism for the coating head 10, reducing the risk of damage to the coating head 10 and extending its service life. Furthermore, by setting the distance between the protective device and the substrate 40 to be smaller than the distance between the die lip 101 and the substrate 40, the present invention can monitor in real time whether there are foreign objects in the area in front of the coating head 10. Once a foreign object is found approaching, an alarm is immediately issued or corresponding protective measures are triggered (such as suspending the coating operation, adjusting coating parameters, etc.). It can also ensure that the protective plate 20 can serve as the first line of defense and contact possible foreign objects before the die lip 101, thereby protecting the die lip 101 from damage.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A protective device for a coating head (10), characterized in that: The coating head (10) comprises: A first surface (1021) and a second surface (1022) facing each other, wherein the first surface (1021) and the second surface (1022) are both perpendicular to the direction of travel of the coating operation, and the first surface (1021) is located in the direction of travel of the coating operation relative to the second surface (1022); The distance between the die lip (101) of the coating head (10) and the substrate (40) is greater than the distance between the protective device and the substrate (40); The protective device comprises: a protective plate (20), the protective plate (20) being arranged on the first surface (1021); A foreign object detection component (30) is provided on the protective plate (20).

2. The protective device of the coating head (10) according to claim 1, characterized in that The foreign matter detection component (30) comprises: A first sensor (301) and a second sensor (302), wherein the first sensor (301) and the second sensor (302) are both arranged on the protective plate (20).

3. The protective device of the coating head (10) according to claim 2, characterized in that The protective plate (20) comprises: a first side (203) and a second side (204) that are opposite to each other, wherein the first side (203) and the second side (204) are both perpendicular to the direction of travel of the coating operation, and the first side (203) is located in the direction of travel of the coating operation relative to the second side (204); The first sensor (301) is disposed on the first side (203).

4. The protective device of the coating head (10) according to claim 3, characterized in that The distance between the first sensor (301) and the substrate (40) is greater than or equal to a first threshold value and less than or equal to a second threshold value; The second threshold is greater than or equal to the first threshold.

5. The protective device of the coating head (10) according to claim 2, characterized in that: The protective plate (20) comprises: a first top surface (201) and a first bottom surface (202) facing each other, wherein the distance between the first top surface (201) and the base plate (40) is greater than the distance between the first bottom surface (202) and the base plate (40); The second sensor (302) is arranged on the first bottom surface (202).

6. The protective device of the coating head (10) according to claim 2, characterized in that The distance between the second sensor (302) and the substrate (40) is greater than or equal to a first threshold.

7. The protective device of the coating head (10) according to claim 2, characterized in that The distance between the die lip (101) of the coating head (10) and the substrate (40) is greater than the distance between the second sensor (302) and the substrate (40).

8. The protective device of the coating head (10) according to claim 7, characterized in that The difference between the distance between the die lip (101) of the coating head (10) and the substrate (40) and the distance between the second sensor (302) and the substrate (40) is greater than or equal to a third threshold.

9. The protective device of the coating head (10) according to claim 2, characterized in that: The first sensor (301) and the second sensor (302) are both thin film pressure sensors; The foreign matter detection component (30) comprises: An alarm is connected to the first sensor (301) and the second sensor (302).

10. The protective device of the coating head (10) according to claim 1, characterized in that The protective plate (20) is perpendicular to the base plate (40); The coating head (10) comprises: an upper mold assembly (102), the upper mold assembly (102) being connected to the protective plate (20); The lower mold assembly (103) includes a second top surface, a second bottom surface, and a side surface (1031), wherein the second top surface is connected to the The upper mold assembly (102) is provided with a mold lip (101) on the second bottom surface, the angle formed by the side surface (1031) and the base plate (40) is an acute angle, and a protective space (1032) is formed between the side surface (1031) and the protective plate (20).

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