Differential pressure coating machine

Abstract

The application provides a differential pressure coating machine, which comprises a rack, a base, a diaphragm positioning frame body, a lifting assembly, a lifting driving mechanism, an upper warehouse body, a first rotary driving mechanism, a first connecting rod and a second connecting rod. The base is arranged on the rack, the diaphragm positioning frame body is arranged on the upper part of the base, the lifting assembly is arranged on the upper part of the base and below the diaphragm positioning frame body in a movable manner, the lifting driving mechanism is connected with the lifting assembly, and the lifting driving mechanism can drive the lifting assembly to move up and down. The upper warehouse body is arranged on the rack in a movable manner and above the base, the first rotary driving mechanism is arranged on the rack, the output end of the first rotary driving mechanism is connected with one end of the first connecting rod, the other end of the first connecting rod is pivotally connected with one end of the second connecting rod, the other end of the second connecting rod is pivotally connected with the upper warehouse body, the first connecting rod is driven to rotate by the first rotary driving mechanism, the upper warehouse body is driven to lift by the second connecting rod, and the upper warehouse body is combined with the base or separated.

Description

Technical Field

[0001] This invention relates to the field of differential pressure coating technology, and more particularly to a differential pressure coating machine. Background Technology

[0002] Differential pressure coating is a 3D surface decoration process that achieves higher quality appearance. It uses vacuum atmospheric pressure to coat the product, and by using different diaphragm effects, it can replicate the surface effects of various materials, such as wood grain, leather, carbon fiber, and paper / fabric textures. Existing differential pressure coating machines drive the lower and upper molds to close, then heat and vacuum the cavity formed by the molds. The product is then driven to rise within the cavity and adhere to the diaphragm, followed by high-pressure shaping to obtain the differential pressure coated product. However, existing differential pressure coating machines use a hydraulic structure to move the lower mold to close with the upper mold. This hydraulic structure requires a large hydraulic circuit, resulting in large size, significant factory space requirements, and high costs. Furthermore, during the high-pressure shaping stage, the existing hydraulic structure is prone to movement under high pressure, making it difficult to maintain the lower mold's position and causing unstable mold closure, severely affecting the coating quality. Summary of the Invention

[0003] The purpose of this invention is to provide a differential pressure coating machine that is smaller in size and has lower production costs.

[0004] To achieve the above objectives, the present invention provides a differential pressure coating machine, comprising a frame, a base, a diaphragm positioning frame, a lifting assembly, a lifting drive mechanism, an upper chamber, a first rotation drive mechanism, a first connecting rod, and a second connecting rod. The base is disposed on the frame, and the diaphragm positioning frame is disposed on the upper part of the base for positioning the diaphragm. The lifting assembly is movably disposed on the upper part of the base and located below the diaphragm positioning frame, and the upper part of the lifting assembly is used for positioning the workpiece. The lifting drive mechanism is connected to the lifting assembly. The moving mechanism can drive the lifting assembly to move up and down; the upper compartment is movably mounted on the frame and located above the base. The first rotation drive mechanism is mounted on the frame. The output end of the first rotation drive mechanism is connected to one end of the first connecting rod. The other end of the first connecting rod is pivotally connected to one end of the second connecting rod. The other end of the second connecting rod is pivotally connected to the upper compartment. The first rotation drive mechanism drives the first connecting rod to rotate, thereby driving the upper compartment to rise and fall through the second connecting rod, so that the upper compartment can be molded or separated from the base.

[0005] Preferably, the frame is provided with a lifting slide rail arranged along the vertical movement direction of the upper compartment, and the upper compartment is slidably mounted on the lifting slide rail.

[0006] Preferably, there are two first links and two second links. The two first links are pivotally connected to the frame at intervals. The first rotation drive mechanism is connected to one end of one of the first links. A first connecting shaft is connected between the other ends of the two first links. One end of the two second links is pivotally connected to the first connecting shaft at intervals. The other ends of the two second links are respectively pivotally connected to the upper compartment body.

[0007] Preferably, the frame is provided with a first detection sensor, which is used to detect whether the second link has moved to below the first link and is in the same length direction as the first link.

[0008] Preferably, the upper part of the diaphragm positioning frame is provided with positioning posts for positioning the diaphragm.

[0009] Preferably, the upper chamber has a downward-facing accommodating cavity, the inner wall of which is provided with an upper pressure plate, and the upper pressure plate is provided with a through hole for the workpiece to pass through; when the upper chamber and the base are molded together, the upper pressure plate presses against the diaphragm located on the support frame.

[0010] Preferably, the bottom of the upper compartment is provided with a sealing strip for sealing between the upper compartment and the base.

[0011] Preferably, the lifting drive mechanism includes a second rotation drive mechanism, a third link, and a fourth link. The second rotation drive mechanism is disposed on the base. The output end of the second rotation drive mechanism is connected to one end of the third link, and the other end of the third link is pivotally connected to one end of the fourth link. The other end of the fourth link is pivotally connected to the lifting assembly. The second rotation drive mechanism drives the third link to rotate, thereby driving the lifting assembly to rise and fall through the fourth link.

[0012] Preferably, the base is provided with a second detection sensor, which is used to detect whether the fourth link has moved above the third link and is in the same length direction as the third link.

[0013] Preferably, the frame is provided with a transverse drive mechanism, the base is movably disposed on the frame, the transverse drive mechanism is connected to the base, and the transverse drive mechanism drives the base to move transversely, so that the base moves to below the upper compartment or moves away from the upper compartment.

[0014] Compared with existing technologies, the differential pressure coating machine of the present invention movably mounts the upper chamber on the frame and, through the provision of a first rotation drive mechanism, a first connecting rod, and a second connecting rod, drives the first connecting rod to rotate, causing the first connecting rod to swing the second connecting rod. This causes the second connecting rod to push the upper chamber down or pull it up, thereby allowing the upper chamber to close or separate from the base. The differential pressure coating machine of the present invention uses a purely mechanical linkage mechanism to drive the upper chamber to rise and fall. Compared with existing hydraulic mechanisms, it has the advantages of small size, small factory space occupation, and low production cost. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the differential pressure coating machine of the present invention when the base avoids the upper chamber.

[0016] Figure 2 This is a three-dimensional structural diagram of the differential pressure coating machine of the present invention when the base moves above the upper chamber.

[0017] Figure 3 This is a three-dimensional structural diagram of the differential pressure coating machine of the present invention after the upper chamber and the base are molded together.

[0018] Figure 4 This is a connection structure diagram of the first rotation drive mechanism, the first connecting rod, and the second connecting rod of the differential pressure coating machine of the present invention.

[0019] Figure 5 This is a structural diagram of the first rotation drive mechanism of the differential pressure coating machine of the present invention when it drives the first connecting rod to rotate and moves the second connecting rod to below the first connecting rod.

[0020] Figure 6 This is a three-dimensional structural diagram of the upper compartment body and the base after separation of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the upper compartment and the base of the present invention.

[0022] Figure 8 yes Figure 7 A sectional view.

[0023] Figure 9 This is a three-dimensional structural diagram of the lifting drive mechanism of the present invention after driving the lifting component to rise.

[0024] Figure 10 yes Figure 9 A sectional view.

[0025] Figure 11 This is a three-dimensional structural diagram of the lifting drive mechanism of the present invention.

[0026] Figure 12This is a three-dimensional structural diagram of the upper compartment of the present invention.

[0027] Figure 13 yes Figure 6 Enlarged view of point A in the middle. Detailed Implementation

[0028] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] Please see Figures 1 to 5 The differential pressure coating machine 100 of the present invention includes a frame 1, a base 2, a diaphragm positioning frame 3, a lifting assembly 4, a lifting drive mechanism 5, an upper chamber 6, a first rotation drive mechanism 7, a first connecting rod 8, and a second connecting rod 9. The base 2 is mounted on the frame 1. The diaphragm positioning frame 3 is mounted on the upper part of the base 2 and is used to position the diaphragm 200. The lifting assembly 4 is movably mounted on the upper part of the base 2 and located below the diaphragm positioning frame 3. The upper part of the lifting assembly 4 is used to position the workpiece 300. The lifting drive mechanism 5 is connected to the lifting assembly 4 and can drive the lifting assembly 4 to move up and down. The upper chamber 6 is movably mounted on the frame 1 and located above the base 2. The first rotation drive mechanism 7 is mounted on the frame 1. The output end of the first rotation drive mechanism 7 is connected to one end of the first connecting rod 8, the other end of the first connecting rod 8 is pivotally connected to one end of the second connecting rod 9, and the other end of the second connecting rod 9 is pivotally connected to the upper chamber 6. The first rotating drive mechanism 7 drives the first connecting rod 8 to rotate, which in turn drives the upper chamber 6 to rise and fall via the second connecting rod 9, allowing the upper chamber 6 to close or separate from the base 2. When the upper chamber 6 is closed with the base 2, it covers the diaphragm positioning frame 3 and the lifting assembly 4. Specifically, the first rotating drive mechanism 7 can be an existing geared motor, but is not limited to it.

[0030] Please see Figures 6 to 8 ,as well as Figure 12The upper chamber 6 has a downward-facing accommodating cavity 62. An upper pressure plate 63 is provided on the inner wall of the accommodating cavity 62, and the upper pressure plate 63 has a through hole 631 for the workpiece 300 to pass through. When the upper chamber 6 and the base 2 are closed, the upper pressure plate 63 presses against the diaphragm 200 located on the support frame. Simultaneously, the diaphragm 200 divides the accommodating cavity 62 into an upper cavity and a lower cavity. A heating unit 64 for heating and softening the diaphragm 200 can be provided at the top of the upper cavity. The upper chamber 6 can also be connected to an external vacuum equipment 14 and a high-pressure gas supply device 15, allowing the vacuum equipment 14 to evacuate the accommodating cavity 62. Specifically, the upper pressure plate 63 is arranged along the circumferential direction of the inner wall of the upper chamber 6, and the upper pressure plate 63 has a through hole 631 for the workpiece 300 to pass through. The lifting drive mechanism 5 drives the lifting component 4 to rise, which in turn causes the lifting component 4 to lift the workpiece 300 located on it, so that the workpiece 300 is in close contact with the diaphragm 200 located between the diaphragm positioning frame 3 and the upper pressure plate 63 and passes through the through hole 631, ensuring that the diaphragm 200 can completely cover the surface of the workpiece 300.

[0031] Please see Figure 3 In this embodiment, the frame 1 is provided with a lifting slide rail 11 arranged along the vertical movement direction of the upper compartment 6, and the upper compartment 6 is slidably mounted on the lifting slide rail 11. A liftable slider is mounted on the upper compartment 6 and is slidably mounted on the lifting slide rail 11 via the lifting slider.

[0032] Please see Figure 4 and Figure 5 In this embodiment, there are two first connecting rods 8 and two second connecting rods 9. The two first connecting rods 8 are pivotally connected to the frame 1 at intervals. The first rotation drive mechanism 7 is connected to one end of one of the first connecting rods 8. A first connecting shaft 81 is connected between the other ends of the two first connecting rods 8. One end of the two second connecting rods 9 is pivotally connected to the first connecting shaft 81 at intervals, and the other end of the two second connecting rods 9 is pivotally connected to the upper compartment 6 respectively. However, the number of first connecting rods 8 and second connecting rods 9 is not limited to this. For example, in other embodiments, the number of first connecting rods 8 and second connecting rods 9 may be one or three, etc.

[0033] Please see Figure 2 and Figure 3The frame 1 is equipped with a first detection sensor 12, which is used to detect whether the second connecting rod 9 has moved to the lower position of the first connecting rod 8 and is in the same length direction as the first connecting rod 8. The first rotation drive mechanism 7 drives the first connecting rod 8 to rotate, so as to drive the upper chamber 6 to descend through the second connecting rod 9. When the second connecting rod 9 moves to the lower position of the first connecting rod 8 and is in the same length direction as the first connecting rod 8, that is, when the second connecting rod 9 and the first connecting rod 8 are in the same vertical direction, the second connecting rod 9 pushes the upper chamber 6 down to the lowest position and closes the mold with the base 2. At the same time, the first detection sensor 12 is triggered, so that the first detection sensor 12 feeds back the signal to the control system, thereby causing the control system to control the first rotation drive mechanism 7 to stop driving the first connecting rod 8, so that the upper chamber 6 stays in the mold closing position. When high-pressure gas is injected into the upper chamber 6 of the accommodating cavity 62 for high-pressure molding, since the second connecting rod 9 is located below the first connecting rod 8 and is in the same length direction as the first connecting rod 8, even under the external force generated by the high-pressure gas, the first connecting rod 8 and the second connecting rod 9 can remain stable, thus ensuring that the upper chamber 6 remains stably in the mold closing position. Furthermore, a first limiting stop (not shown in the figure) can be provided on the upper chamber 6 to block the second connecting rod 9. When the second connecting rod 9 moves to below the first connecting rod 8 and is in the same length direction as the first connecting rod 8, the first limiting stop blocks the movement of the second connecting rod 9. In practical applications, if the second connecting rod 9 moves past the area below the first connecting rod 8 and past the position in the same length direction as the first connecting rod 8, the first limiting stop limits the movement of the second connecting rod 9, ensuring that the distance traveled by the second connecting rod 9 is within the allowable range. However, this is not a limitation. In other embodiments, the first limiting stop can also directly block the second link 9 below the first link 8 and at a position in the same length direction as the first link 8; and the first limiting stop can also be set on the frame 1.

[0034] Please see Figure 12 The bottom of the upper chamber 6 is provided with a sealing strip 61 for sealing between the upper chamber 6 and the base 2. By setting the sealing strip 61 to seal between the upper chamber 6 and the base 2, the airtightness of the connection between the upper chamber 6 and the base 2 is ensured, so as to facilitate the vacuuming of the accommodating cavity 62 of the upper chamber 6.

[0035] Please see Figures 7 to 11In this embodiment, the lifting drive mechanism 5 includes a second rotation drive mechanism 51, a third connecting rod 52, and a fourth connecting rod 53. The second rotation drive mechanism 51 is mounted on the base 2. The output end of the second rotation drive mechanism 51 is connected to one end of the third connecting rod 52, and the other end of the third connecting rod 52 is pivotally connected to one end of the fourth connecting rod 53. The other end of the fourth connecting rod 53 is pivotally connected to the lifting assembly 4. The second rotation drive mechanism 51 drives the third connecting rod 52 to rotate, thereby driving the lifting assembly 4 to rise and fall through the fourth connecting rod 53. This causes the lifting assembly 4 to lift the workpiece 300 and make it fit against the diaphragm 200 located on the diaphragm positioning frame 3, or to lower and reset the lifting assembly 4. Specifically, the second rotation drive mechanism 51 is a geared motor, but it is not limited to this. More specifically, there are two third links 52 and two fourth links 53. The two third links 52 are pivotally connected to the base 2. The second rotation drive mechanism 51 is connected to one end of one of the third links 52. A second connecting shaft 54 ​​connects the other ends of the two third links 52. One end of the two fourth links 53 is pivotally connected to the second connecting shaft 54 ​​at intervals. The other ends of the two fourth links 53 are pivotally connected to the lifting assembly 4. However, the number of third links 52 and four links 53 is not limited to this. For example, there may be one or three third links 52 and four links 53, etc.

[0036] Please see Figures 8 to 10A second detection sensor 21 is provided on the base 2. The second detection sensor 21 is used to detect whether the fourth link 53 has moved above the third link 52 and is in the same length direction as the third link 52. The third link 52 is driven to rotate by the second rotation drive mechanism 51, so that the third link 52 drives the fourth link 53 to swing, so that the fourth link 53 drives the lifting assembly 4 to rise and fall. When the fourth link 53 moves above the third link 52 and is in the same length direction as the third link 52, that is, when the fourth link 53 and the third link 52 are in the same vertical direction, the fourth link 53 pushes the lifting assembly 4 to rise to the highest position. The workpiece 300 on the lifting assembly 4 is in close contact with the diaphragm 200 located between the support frame and the upper pressure plate 63 and passes through the through hole 631. At the same time, the second detection sensor 21 is triggered, so that the second detection sensor 21 feeds back the signal to the control system, so that the control system controls the second rotation drive mechanism 51 to stop driving the third link 52, so that the lifting assembly 4 stops at the position where the workpiece 300 and the diaphragm 200 are in close contact. When high-pressure gas is injected into the upper chamber 6 of the accommodating cavity 62 for high-pressure molding, since the fourth link 53 is located above the third link 52 and in the same length direction as the third link 52, the third link 52 and the fourth link 53 can remain stable, thus ensuring that the lifting assembly 4 remains stably in this position. This, in turn, ensures that the workpiece 300 and the diaphragm 200 can be stably molded under high pressure, avoiding the generation of air bubbles between the workpiece 300 and the diaphragm 200. Furthermore, the base 2 is provided with a second limiting stop 22 for blocking and limiting the fourth link 53. When the fourth link 53 moves above the third link 52 and in the same length direction as the third link 52, the second limiting stop 22 is located in front of the movement of the fourth link 53. In practical applications, if the fourth link 53 moves past the third link 52 and passes a position in the same length direction as the third link 52, the second limiting stop 22 can limit the fourth link 53, ensuring that the distance traveled by the fourth link 53 is within an allowable range. However, this is not a limitation; in other embodiments, the second limiting stop 22 can also directly block the fourth link 53 above the third link 52 and at a position in the same length direction as the third link 52.

[0037] Please see Figure 6 and Figure 13 The upper part of the diaphragm positioning frame 3 is provided with positioning posts 31 for positioning the diaphragm 200. Specifically, several positioning posts 31 are distributed at the four corners of the upper part of the diaphragm positioning frame 3. The diaphragm 200 can be inserted through the positioning posts 31, and the positioning posts 31 are used to position the diaphragm 200 to prevent the position of the diaphragm 200 from shifting. Furthermore, the upper part of the diaphragm positioning frame 3 can be provided with vacuum adsorption holes (not shown in the figure) to position the diaphragm 200.

[0038] Please see Figure 6, Figure 8 and Figure 9 The lifting assembly 4 includes a lifting rod 41 and a lifting carrier plate 42. The lifting rod 41 is movably mounted on the base 2. A fourth connecting rod 53 is pivotally connected to one end of the lifting rod 41. The lifting carrier plate 42 is fixed to the other end of the lifting rod 41 and is used to position and support the workpiece 300. The second rotation drive mechanism 51 drives the third connecting rod 52 to rotate, thereby driving the lifting rod 41 and the lifting carrier plate 42 to rise and fall together through the fourth connecting rod 53. Vacuum adsorption holes (not shown in the figure) can be provided on the lifting carrier plate 42 to position the workpiece 300, but this is not a limitation. Furthermore, the lifting assembly 4 also includes a lifting guide rod 43. One end of the lifting guide rod 43 is movably mounted on the base 2, and the other end is fixedly connected to the bottom of the lifting carrier plate 42. The lifting guide rod 43 can guide the rising and falling of the lifting carrier plate 42. Furthermore, the lifting carrier plate 42 is movably mounted on the column of the diaphragm positioning frame 3.

[0039] Please see Figure 1 and Figure 2 The frame 1 is equipped with a transverse drive mechanism 13, and the base 2 is movably mounted on the frame 1. The transverse drive mechanism 13 is connected to the base 2. The transverse drive mechanism 13 drives the base 2 to move laterally, so that the base 2 moves below the upper chamber 6 or moves away from the upper chamber 6. By driving the base 2 to move laterally through the transverse drive mechanism 13, the base 2 moves away from the upper chamber 6, so that the workpiece 300 can be loaded and positioned on the lifting plate 42 of the lifting assembly 4, and the diaphragm 200 can be loaded and positioned on the diaphragm positioning frame 3. Then, the transverse drive mechanism 13 drives the base 2 to move laterally in the opposite direction, so that the base 2 moves below the upper chamber 6, so that the first rotation drive mechanism 7 drives the first connecting rod 8 to rotate, so that the upper chamber 6 is lowered through the second connecting rod 9, so that the upper chamber 6 and the base 2 close the mold. The transverse drive mechanism 13 can use an existing motor-driven transmission pulley assembly to drive the base 2 to move laterally, but it is not limited to this. For example, the transverse drive mechanism 13 can also use an existing telescopic cylinder or linear drive module. Specifically, the frame 1 is provided with a transverse slide rail, and the base 2 slides on the transverse slide rail.

[0040] Combination Figures 1 to 13 The specific working principle of the differential pressure coating machine 100 of the present invention is as follows:

[0041] The base 2 is driven to move laterally by the transverse drive mechanism 13, causing it to move away from the upper chamber 6. This allows the workpiece 300 to be loaded and positioned onto the lifting platform 42 of the lifting assembly 4, and the diaphragm 200 to be loaded and positioned onto the diaphragm positioning frame 3. Then, the base 2 is driven to move laterally in the opposite direction by the transverse drive mechanism 13, causing it to move below the upper chamber 6. The first rotation drive mechanism 7 drives the first connecting rod 8 to rotate, thereby causing the upper chamber 6 to descend via the second connecting rod 9. When the second connecting rod 9 moves to below the first connecting rod 8 and is in the same length direction as the first connecting rod 8, that is, when the second connecting rod 9 and the first connecting rod 8 are in the same vertical direction, the second connecting rod 9 pushes the upper chamber 6 down to the lowest position and closes the mold with the base 2. At the same time, the first detection sensor 12 is triggered, causing the first detection sensor 12 to feed back a signal to the control system, thereby causing the control system to control the first rotation drive mechanism 7 to stop driving the first connecting rod 8, so that the upper chamber 6 stays at the mold closing position. By evacuating and heating the accommodating cavity 62, the diaphragm 200 is softened to a coverable state. The second rotation drive mechanism 51 drives the third link 52 to rotate, causing the third link 52 to swing the fourth link 53, thereby pushing the lifting assembly 4 upward. When the fourth link 53 moves above the third link 52 and is in the same length direction as the third link 52, that is, when the fourth link 53 and the third link 52 are in the same vertical direction, the fourth link 53 pushes the lifting assembly 4 to the highest position. The workpiece 300 on the lifting assembly 4 is in close contact with the diaphragm 200 located between the support frame and the upper pressure plate 63 and passes through the through hole 631. At the same time, the second detection sensor 21 is triggered, causing the second detection sensor 21 to feed back a signal to the control system, which then controls the second rotation drive mechanism 51 to stop driving the third link 52, thereby causing the lifting assembly 4 and the workpiece 300 to remain in close contact with the diaphragm 200. High-pressure gas is then injected into the upper chamber 6 of the accommodating cavity 62, so that the diaphragm 200 is quickly coated on the surface of the workpiece 300 under high-pressure gas without generating bubbles.

[0042] In summary, the differential pressure coating machine 100 of the present invention movably mounts the upper chamber 6 on the frame 1, and by providing a first rotation drive mechanism 7, a first connecting rod 8, and a second connecting rod 9, the first rotation drive mechanism 7 drives the first connecting rod 8 to rotate, causing the first connecting rod 8 to drive the second connecting rod 9 to swing, thereby causing the second connecting rod 9 to push the upper chamber 6 down or pull the upper chamber 6 up, thus allowing the upper chamber 6 to close or separate from the base 2. The differential pressure coating machine 100 of the present invention uses a purely mechanical linkage mechanism to drive the upper chamber 6 to rise and fall, which, compared with the existing hydraulic mechanisms, has the advantages of small size, small factory space occupation, and low production cost. Furthermore, the differential pressure coating machine 100 of the present invention uses a purely mechanical linkage mechanism to drive the lifting assembly 4 to rise and fall, which, compared with the existing hydraulic mechanisms, further reduces the size of the differential pressure coating machine 100, reduces the factory space occupied, and further lowers the production cost. Furthermore, during the high-pressure molding process of injecting high-pressure gas into the upper chamber 6 of the accommodating cavity 62, since the second connecting rod 9 is located below the first connecting rod 8 and is in the same length direction as the first connecting rod 8, and the fourth connecting rod 53 is located above the third connecting rod 52 and is in the same length direction as the third connecting rod 52, even if subjected to external force generated by the high-pressure gas, the first connecting rod 8 and the second connecting rod 9 can remain stable, and the third connecting rod 52 and the fourth connecting rod 53 can also remain stable. This ensures that the upper chamber 6 remains stably in the mold closing position, and the lifting assembly 4 remains stably in the position where the workpiece 300 and the diaphragm 200 are in close contact. This ensures that the workpiece 300 and the diaphragm 200 can be stably molded under high pressure, avoids the generation of air bubbles between the workpiece 300 and the diaphragm 200, and ensures the coating quality of the product.

[0043] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. A differential pressure coating machine, characterized in that, The device includes a frame, a base, a diaphragm positioning frame, a lifting assembly, a lifting drive mechanism, an upper chamber, a first rotation drive mechanism, a first connecting rod, and a second connecting rod. The base is mounted on the frame, and the diaphragm positioning frame is located on the upper part of the base for positioning the diaphragm. The lifting assembly is movably mounted on the upper part of the base and below the diaphragm positioning frame, with its upper part used for positioning workpieces. The lifting drive mechanism is connected to the lifting assembly and can drive the lifting assembly to move up and down. The upper chamber is movably mounted on the frame and above the base. The first rotation drive mechanism is mounted on the frame, with its output end connected to one end of the first connecting rod. The other end of the first connecting rod is pivotally connected to one end of the second connecting rod, and the other end of the second connecting rod is pivotally connected to the upper chamber. The first rotating drive mechanism drives the first connecting rod to rotate. The mechanism is designed to move the upper chamber body up and down via the second connecting rod, causing the upper chamber body to close or separate from the base. A first detection sensor is provided on the frame to detect whether the second connecting rod has moved below the first connecting rod and is in the same length direction. The lifting drive mechanism includes a second rotation drive mechanism, a third connecting rod, and a fourth connecting rod. The second rotation drive mechanism is mounted on the base, and its output end is connected to one end of the third connecting rod. The other end of the third connecting rod is pivotally connected to one end of the fourth connecting rod, and the other end of the fourth connecting rod is pivotally connected to the lifting assembly. The second rotation drive mechanism drives the third connecting rod to rotate, thereby causing the lifting assembly to move up and down via the fourth connecting rod. A second detection sensor is provided on the base to detect whether the fourth connecting rod has moved above the third connecting rod and is in the same length direction.

2. The differential pressure coating machine according to claim 1, characterized in that, The frame is provided with a lifting slide rail that is arranged along the vertical movement direction of the upper compartment, and the upper compartment slides on the lifting slide rail.

3. The differential pressure coating machine according to claim 1, characterized in that, There are two first links and two second links. The two first links are pivotally connected to the frame at intervals. The first rotation drive mechanism is connected to one end of one of the first links. A first connecting shaft is connected between the other ends of the two first links. One end of the two second links is pivotally connected to the first connecting shaft at intervals. The other ends of the two second links are respectively pivotally connected to the upper compartment body.

4. The differential pressure coating machine according to claim 1, characterized in that, The upper part of the diaphragm positioning frame is provided with positioning posts for positioning the diaphragm.

5. The differential pressure coating machine according to claim 1, characterized in that, The upper chamber has a downward-facing accommodating cavity, and the inner wall of the accommodating cavity is provided with an upper pressure plate. The upper pressure plate is provided with a through hole for the workpiece to pass through. When the upper chamber and the base are molded together, the upper pressure plate presses against the diaphragm located on the support frame.

6. The differential pressure coating machine according to claim 1, characterized in that, The bottom of the upper compartment is provided with a sealing strip for sealing between the upper compartment and the base.

7. The differential pressure coating machine according to claim 1, characterized in that, The frame is provided with a transverse drive mechanism, and the base is movably mounted on the frame. The transverse drive mechanism is connected to the base, and the base is driven to move laterally by the transverse drive mechanism, so that the base moves to below the upper compartment or moves away from the upper compartment.

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