Coating device capable of controlling immersion depth of wiping edge in drum core

Abstract

The utility model belongs to the technical field of organic photoconductive drum core coating, and particularly relates to a coating device capable of controlling the immersion depth of a wiping edge in a drum core, which is applied to the coating operation of the drum core. The utility model provides the coating device capable of controlling the immersion depth of the inner wiping edge of the drum core, and the coating device can control the air pressure in the drum core, so that the immersion depth of the inner wiping edge of the drum core is as small as possible, the coating quality of an inner tube of the drum core is further improved, and the dual purposes of improving the quality of the drum core and protecting the environment are achieved. The coating device comprises an operation unit, a detection control unit and a compressed air unit, the operation unit comprises a hollow main body part and a grabbing part arranged on the outer side wall of the lower end of the main body part, the grabbing part is used for grabbing a drum core, and an inner tube of the drum core is communicated with a hollow cavity of the main body part; the detection control unit comprises an air pressure sensor for detecting the air pressure of the drum core inner tube in real time; and the compressed air unit is communicated with the hollow cavity of the main body part and is used for inflating the inner pipe of the drum core grabbed by the grabbing part.

Description

Technical Field

[0001] The utility model belongs to the technical field of organic photoconductive drum core coating, in particular to a coating device capable of controlling the depth of edge wiping liquid immersion in the drum core, and is applied to the coating operation of the drum core. Background Art

[0002] The drum core is an organic photoconductor drum. Organic photoconductor drums are core components of modern office equipment such as copiers, laser printers, laser fax machines, and multifunction printers. They primarily utilize photoelectric conversion to achieve imaging. Drum core coating is a crucial step in the production of organic photoconductor drums. The coating environment's temperature, humidity, airflow, the speed at which the drum core is immersed in and removed from the coating liquid, and the pressure within the drum core all significantly impact its performance. Controlling the depth of the rubbing liquid within the drum core during coating directly impacts the drum core's quality.

[0003] Generally speaking, residual coating liquid on the inner edge is difficult to wipe off. Currently, the technology for achieving this is still immature. Most solutions are implemented by removing the inner edge from the drum core after coating. Therefore, minimizing the immersion depth of the inner edge is a pressing technical challenge in the field of organic photoconductive drum core coating technology. If this technical challenge remains unresolved, the coating liquid solidified on the inner edge of the drum core, due to its hard texture, could damage the gears during assembly, compromising assembly accuracy and yield. From an environmental perspective, the use of solvents in the inner edge removal process also produces hazardous waste, polluting the environment. Utility Model Content

[0004] In view of this, the utility model provides a coating device that can control the immersion depth of the edge wiping inside the drum core. The coating device can control the air pressure inside the drum core to make the immersion depth of the edge wiping inside the drum core as small as possible, thereby improving the coating quality of the inner tube of the drum core, achieving the dual goals of improving the quality of the drum core and environmental protection.

[0005] The utility model adopts the following specific technical solutions: the coating device includes: an operating unit, a detection control unit and a compressed air unit,

[0006] The operation unit includes a hollow main body and a gripping portion provided on the outer side wall of the lower end of the main body, wherein the gripping portion is used to grip the drum core. After the gripping portion grips the drum core, the inner tube of the drum core is connected to the hollow cavity of the main body;

[0007] The detection control unit includes an air pressure sensor for detecting the air pressure of the drum core inner tube in real time;

[0008] The compressed air unit is communicated with the hollow cavity of the main body and is used to inflate air into the inner tube of the drum core grasped by the grasping portion.

[0009] Preferably, the gripping portion comprises an airbag;

[0010] The air bag is connected to a compressed air unit.

[0011] Preferably, the compressed air unit comprises a compressed air device and a control valve;

[0012] Two through holes are provided on the side wall of the main body for connecting pipeline A and pipeline B respectively; pipeline A is connected to the hollow cavity of the main body through one of the through holes.

[0013] The pipe B is connected to the airbag through another through hole and an air channel provided on the main body;

[0014] The pipeline A and the pipeline B are respectively connected to the compressed air device;

[0015] Both the pipeline A and the pipeline B are provided with control valves.

[0016] Preferably, the bottom of the main body is provided with a boss section having external threads;

[0017] The airbag is wrapped around the boss segment and is threadedly connected to the boss segment.

[0018] Preferably, the air pressure sensor is installed on the top of the main body, and the sensing end thereof is inserted into the hollow cavity from the top of the main body.

[0019] Beneficial effects

[0020] (1) The coating device achieves the purpose of preventing the coating solution from penetrating into the drum core and rubbing the edge through the combined design of the operating unit, the detection control unit and the compressed air unit. The combined design has the characteristics of simple structure and convenient assembly.

[0021] (2) The coating device grabs the drum core by inflating the airbag, achieving soft operation of grabbing the drum core and reducing the risk of damage to the drum core due to hard contact.

[0022] (3) Furthermore, the threaded connection between the boss section of the main body and the airbag increases the firmness between the airbag and the main body, thereby improving the durability of the gripping portion.

[0023] (4) A cavity structure is provided inside the main body and passes through its bottom. The upper end of the hollow cavity is connected to an air pressure sensor, and the side wall of the main body is connected to a compressed air device through a pipe A to realize direct detection of the air in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram showing the connection relationship between the various components of the utility model;

[0025] Figure 2 A three-dimensional diagram of the combination of the operating unit and the air pressure sensor;

[0026] Figure 3 It is a front view of the combination of the working unit and the air pressure sensor;

[0027] Figure 4 A cross-sectional view of the combination of the operating unit and the air pressure sensor;

[0028] Among them, 1-air pressure sensor, 2-PLC controller, 3-main body, 4-grabbing part, 5-compressed air device, 6-control valve, 8-pipeline A, 9-pipeline B, 10-airbag, 11-hollow cavity, 12-airway. DETAILED DESCRIPTION

[0029] The following will further illustrate the present invention with reference to the accompanying drawings: It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific embodiments. Any other implementation methods derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

[0030] like Figure 1-4 As shown, a coating device capable of controlling the immersion depth of the edge of the drum core includes: an operating unit, a detection control unit and a compressed air unit; the operating unit is used to grab the drum core, and the operating unit is connected to the compressed air unit for inflating the inner tube of the grabbed drum core; the detection control unit includes an air pressure sensor 1 and a PLC controller 2, wherein: the operating unit includes a hollow main body 3 and a grabbing part 4 arranged on the outer side wall of the lower end of the main body 3, the grabbing part 4 is used to grab the drum core and immerse it in the coating liquid, and lift the drum core from the coating liquid after the coating is completed; the air pressure sensor 1 is connected to the operating unit below it to form a combination, and during the whole process, the air pressure sensor 1 is used to detect the air pressure of the inner tube of the drum core grabbed by the operating unit in real time; the compressed air unit is connected to the hollow cavity 11 of the main body 3 of the operating unit, and is used to inflate the inner tube of the drum core grabbed by the grabbing part 4.

[0031] The PLC controller 2 is electrically connected to the air pressure sensor 1 and the compressed air unit respectively. The air pressure sensor 1 transmits the detected air pressure signal to the PLC controller 2, and the PLC controller 2 controls the output of compressed air delivered by the compressed air unit to the working unit (which belongs to the existing technology), so that the air pressure in the inner tube of the drum core is not less than the external air pressure, thereby preventing the coating solution from penetrating into the drum core and rubbing the edge.

[0032] The coating device adopts a combined design of an operating unit, a detection control unit and a compressed air unit, and controls the air pressure strength in the drum core tube to prevent the coating solution from penetrating into the drum core and rubbing the edge. The combined design has the characteristics of simple structure and easy assembly.

[0033] The operating unit includes a hollow main body 3 and a grabbing part 4 arranged on the outer side wall of the lower end of the main body 3. The grabbing part 4 is an airbag 10, which is used to grab the drum core. After the grabbing part 4 grabs the drum core, the inner tube of the drum core is connected to the hollow cavity 11 of the main body 3.

[0034] The compressed air unit includes a compressed air device 5 and a control valve 6, wherein two through holes are opened on the side wall of the main body 3 for connecting pipeline A8 and pipeline B9 respectively. The pipeline A8 is connected to the hollow cavity 11 of the main body 3 through one of the through holes, and the pipeline B9 is connected to the airbag 10 through the other through hole and the air channel 12 set on the main body 3; control valves 6 are provided on pipeline A8 and pipeline B9, which are used to control the opening and closing of pipeline A8 and pipeline B9 and adjust the air pressure (an exhaust port is provided on the control valve 6, and the PLC controller 2 is used to control the opening and closing of the exhaust port of the control valve 6, and is responsible for discharging the gas in pipeline A8 and pipeline B9. The control part here belongs to the existing technology); each control valve 6 is electrically connected to the PLC controller 2 and controlled by it.

[0035] The sensing end of the air pressure sensor 1 is inserted into the hollow cavity 11 from the top of the main body 3. The hollow cavity 11 extends to the bottom of the main body 3, allowing the air pressure sensor 1 to detect the air pressure in the drum core inner tube connected to the hollow cavity 11 in real time. The hollow cavity 11 is connected to the pipeline A8, and the compressed air device 5 delivers compressed air to the hollow cavity 11 and the drum core inner tube connected to the hollow cavity 11 through the pipeline A8.

[0036] Working principle:

[0037] Before placing the drum core into the coating liquid, the compressed air device 5 delivers compressed air to the airbag 10 through the pipeline B9. During the process of the airbag 10 changing from deflated to expanded, the drum core (only the top edge area) around it is clamped and fixed; then, the combination of the working unit and the air pressure sensor 1 slowly immerses the drum core into the coating liquid under the action of the robotic arm. During the lowering process, the airbag 10 always tightly clamps the drum core; the bottom of the inner tube of the drum core first contacts the coating liquid. During the process of sinking into the coating liquid, the drum core is affected by the atmospheric pressure. The air pressure in the inner tube at the bottom of the drum core is lower than the air pressure around the outer wall of the drum core. Therefore, the coating liquid can easily penetrate into the side wall of the inner tube of the drum core.

[0038] In order to minimize the possibility of the inner tube side wall being contacted by the coating liquid, during the process of the drum core sinking into the coating liquid, the air pressure sensor 1 connected above the main body 3 detects in real time the air pressure state in the closed space formed between the inner tube of the drum core connected to the hollow cavity 11 and the coating liquid (as the sinking depth of the drum core increases, the degree to which the gas in the closed space is squeezed by the liquid outside the space increases), and outputs the air pressure signal to the PLC controller. The PLC controller controls the opening of the control valve 6 on the pipeline A8 to increase, thereby increasing the amount of compressed air output from the pipeline A8 to the hollow cavity 11, so that the air pressure in the closed space is not less than the air pressure outside the space.

[0039] When the top of the drum core is 2-3 mm away from the surface of the coating liquid, the robotic arm stops lowering the drum core and begins to lift the drum core out of the liquid. During the lifting process, the airbag 10 always tightly clamps the drum core. At the same time, the gas in the closed space formed between the inner tube of the drum core and the coating liquid is less squeezed by the liquid outside the space.

[0040] Tests have shown that when the drum core is lifted out of the coating liquid using this coating device, the depth of the liquid that the inner edge of the bottom of the drum core contacts is no more than 1 mm.

[0041] As an example, a boss section with an external thread is provided at the bottom of the main body 3; an internal threaded sleeve is provided at the center of the airbag 10, which is coaxially sleeved on the outside of the boss section and is threadedly connected to the boss section, thereby increasing the firmness between the airbag 10 and the main body 3 and improving the durability of the gripping portion 4.

[0042] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A coating device capable of controlling the depth of immersion liquid in the drum core, characterized in that: Including operation unit, detection control unit and compressed air unit, The operation unit comprises a hollow main body (3) and a gripping portion (4) arranged on the outer side wall of the lower end of the main body (3); the gripping portion (4) is used to grip the drum core; after the gripping portion (4) grips the drum core, the inner tube of the drum core is communicated with the hollow cavity (11) of the main body (3); The detection control unit comprises an air pressure sensor (1) for detecting the air pressure in the drum core inner tube in real time; The compressed air unit is in communication with the hollow cavity (11) of the main body (3) and is used to inflate the inner tube of the drum core grasped by the grasping portion (4).

2. A coating device capable of controlling the immersion depth of the edge wiping liquid in the drum core according to claim 1, characterized in that: The gripping portion (4) includes an air bag (10); The air bag (10) is connected to a compressed air unit.

3. A coating device capable of controlling the immersion depth of the edge wiping liquid in the drum core according to claim 2, characterized in that: The compressed air unit comprises a compressed air device (5) and a control valve (6); Two through holes are provided on the side wall of the main body (3) for connecting pipeline A (8) and pipeline B (9) respectively; the pipeline A (8) is communicated with the hollow cavity (11) of the main body (3) through one of the through holes. The pipe B (9) is connected to the air bag (10) through another through hole and an air passage (12) provided on the main body (3); The pipeline A (8) and the pipeline B (9) are respectively connected to the compressed air device (5); Control valves (6) are provided on both the pipeline A (8) and the pipeline B (9).

4. A coating device capable of controlling the immersion depth of the edge wiping liquid in the drum core according to claim 2, characterized in that: The bottom of the main body (3) is provided with a boss section having external threads; The air bag (10) is wrapped around the boss section and is threadedly connected to the boss section.

5. A coating device capable of controlling the immersion depth of the edge wiping liquid in the drum core according to any one of claims 1 to 3, characterized in that: The air pressure sensor (1) is mounted on the top of the main body (3), and its sensing end is inserted into the hollow cavity (11) from the top of the main body (3).

Images