A pressure maintaining device

Abstract

The application relates to the technical field of equipment manufacturing, and discloses a pressure maintaining device, which comprises a pressure maintaining head and a driving assembly. The pressure maintaining head is provided with an acting surface which is shaped according to a workpiece to be pressure maintained, and the acting surface is provided with a plurality of gas outlets. An air inlet is arranged on the pressure maintaining head and is communicated with the gas outlets, and the air inlet is connected with an air outlet device. The output end of the driving assembly is connected with the pressure maintaining head to drive the pressure maintaining head to move. When the pressure maintaining device is used to maintain pressure, the pressure maintaining head is first arranged opposite to the surface of the workpiece to be pressure maintained without being in contact with the surface. High-pressure gas output by the air outlet device enters the pressure maintaining head through the air inlet and is discharged through the gas outlets. The driving assembly drives the pressure maintaining head to move, so that the high-pressure gas is distributed between the acting surface and the surface of the workpiece to be pressure maintained, and the pressure is maintained. The pressure maintaining device realizes non-contact pressure maintaining, has no risk of pressure injury to the surface of the workpiece to be pressure maintained, is not limited by the profile, structure, curvature and other characteristics of the product, has low requirements on space, and has a wide application range.

Description

Technical Field

[0001] This invention relates to the field of equipment manufacturing technology, and more specifically, to a pressure-holding device. Background Technology

[0002] In the consumer electronics industry, products involving bonding processes require pressure holding to ensure bond strength. Current pressure holding methods are mostly mechanical direct contact pressure holding, where a cylinder or electric cylinder moves a pressure holding head that conforms to the surface of the product to be pressured, directly contacting the product and applying continuous pressure to maintain the bond.

[0003] However, the above-mentioned pressure holding method requires a flat product surface, a small bending radius, and high requirements for the product's pressure resistance and thickness. In addition, the development cost of the pressure holding device is relatively high. For example, when holding pressure at multiple points simultaneously, the same number of cylinders and contour pressure heads are required. To accommodate the placement of multiple sets of cylinders and ensure that there is no interference between the cylinders, sufficient space is required for simultaneous pressure holding at multiple points.

[0004] In summary, how to effectively solve the limitations of mechanical contact pressure holding is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a pressure holding device, the structural design of which can effectively solve the problem of the large limitations of mechanical contact pressure holding.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A pressure-holding device, comprising: The pressure holding head has a working surface that conforms to the shape of the workpiece to be pressure held. The working surface has multiple air outlets, and the pressure holding head has an air inlet. The air inlet is connected to each of the air outlets and is used to connect to an external air outlet device. A drive component, the output of which is connected to the pressure holding head to drive the pressure holding head to move.

[0007] Optionally, in the pressure holding device described above, a plurality of suction holes are also provided on the working surface, the plurality of suction holes are respectively located at the edge of the working surface, the pressure holding head is provided with a suction port, the suction port is connected to each of the suction holes, and the suction port is used to connect an external suction device.

[0008] Optionally, in the pressure-holding device described above, at least one row of air outlets is provided in the middle of the working surface, and a row of air intakes is provided on both sides of the array formed by the air outlets, and each air intake in each row corresponds one-to-one with the adjacent row of air outlets.

[0009] Optionally, in the pressure-holding device described above, both the air intake port and the air inlet port are located on the end face of the pressure-holding head opposite to the working surface.

[0010] Optionally, in the pressure-holding device described above, the driving component includes a first driving member, which drives the pressure-holding head to reciprocate in a first direction, the first direction being along the distance between two of the air outlets.

[0011] Optionally, in the pressure-holding device described above, the first driving component includes a swing cylinder, the output shaft of which is connected to the pressure-holding head to drive the pressure-holding head to swing, and the swing axis of the pressure-holding head is perpendicular to the distance direction of two of the air outlets.

[0012] Optionally, in the pressure-holding device described above, the driving component includes a second driving member, which drives the pressure-holding head to reciprocate in a second direction, the second direction being perpendicular to the first direction.

[0013] Optionally, in the pressure-holding device described above, the second driving component includes a telescopic cylinder, and a guide rail is provided in cooperation with the telescopic cylinder. The first driving component is slidably disposed on the guide rail, and the guide rail extends along the second direction.

[0014] Optionally, the pressure-holding device further includes a connector, wherein the first driving component is disposed on the connector, and the connector is slidably disposed on the guide rail.

[0015] Optionally, in the pressure-holding device described above, the air inlet is connected to the air intake through an external channel to form an airflow circuit.

[0016] The pressure-holding device provided by the present invention includes a pressure-holding head and a driving assembly. The pressure-holding head has a working surface that conforms to the shape of the workpiece to be pressure-held, and the working surface has multiple air outlets. The pressure-holding head also has an air inlet that communicates with each air outlet and is used to connect to an external air outlet device. The output end of the driving assembly is connected to the pressure-holding head to drive the pressure-holding head to move.

[0017] When using the pressure-holding device provided by this invention for pressure holding, the pressure-holding head is first positioned directly opposite the surface of the workpiece to be pressure-held, but not in contact with it; that is, a gap is maintained between the working surface of the pressure-holding head and the surface of the workpiece. The air inlet is connected to the air outlet, so the high-pressure gas output from the air outlet enters the pressure-holding head through the air inlet and exits through the various air outlets. Simultaneously, the pressure-holding head is moved by the drive assembly, forming a high-pressure gas distribution between the working surface and the surface of the workpiece to be pressure-held, thus achieving gas pressure holding on the surface of the workpiece. After a certain period of pressure holding, the gas supply to the air inlet is stopped to complete the pressure holding process. In summary, the pressure-holding device provided by this invention achieves non-contact pressure holding, eliminating the risk of pressure damage to the surface of the workpiece. Furthermore, non-contact pressure holding reduces the conformal accuracy requirements of the working surface of the pressure-holding head, and is not limited by the shape, structure, curvature, or other characteristics of the product. It also enables simultaneous pressure holding at multiple points, has lower space requirements, and has a wide range of applications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the pressure-holding device according to a specific embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the pressure head; Figure 3 This is a schematic diagram from another perspective of the pressure head; Figure 4 A top view of the pressure head; Figure 5 for Figure 4 Schematic diagram of AA section; Figure 6 for Figure 4 A schematic diagram of the BB cross section.

[0020] The following labels are shown in the attached diagram: Pressure holding head 100, drive assembly 200; Working surface 110, air outlet 120, air inlet 130, air intake 140, air intake 150, air outlet channel 160, air intake channel 170. First drive component 210, second drive component 220, guide rail 230, connector 240, connecting shaft 250. Detailed Implementation

[0021] This invention discloses a pressure-holding device, which has a wide range of applications, low space requirements, and is not limited by the shape, structure, curvature, or other characteristics of the product.

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The pressure-holding device provided by this invention is applicable to, but not limited to, the consumer electronics or automotive industries, such as for maintaining pressure on various bonded products including silicone pads, decorative strips, PET (polyester resin) sheets, FPC (flexible printed circuit boards), and LED (light-emitting diode) lamps. This pressure-holding device enables non-contact pressure holding of the workpiece, meaning pressure can be applied to it without contact with the workpiece.

[0024] Please see Figures 1-3 , Figure 1 This is a schematic diagram of the pressure-holding device according to a specific embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the pressure head; Figure 3 This is a schematic diagram from another perspective to show the pressure head.

[0025] In one specific embodiment, the pressure-holding device provided by the present invention includes a pressure-holding head 100 and a driving assembly 200. The pressure-holding head 100 has an action surface 110 that conforms to the surface of the workpiece to be pressured. It should be noted that the action surface 110 does not need to contact the workpiece during the pressure-holding process. The shape of the action surface 110 is designed according to the surface of the workpiece, so the distance between each position of the action surface 110 and the surface of the workpiece is the same during pressure holding. It is understood that "same" here refers to being the same within a certain error range. Since the action surface 110 does not need to contact the surface of the workpiece, the accuracy requirements for the action surface 110 are reduced. The specific shape of the action surface 110 is not limited here and is not restricted to any particular shape. Figure 2 and 3The curved surface is shown. The working surface 110 has multiple air outlets 120, and the pressure holding head 100 has an air inlet 130. The air inlet 130 communicates with each air outlet 120 and is used to connect to an external air outlet device. There can be one air inlet 130, with each air outlet 120 communicating with it, or multiple air inlets 130, with each air outlet 120 communicating with its corresponding air inlet 130. The air inlet 130 is used to connect to an external air outlet device, which provides high-pressure gas. This device can be a central gas source or a gas cylinder, etc. The output end of the drive assembly 200 is connected to the pressure holding head 100 to drive its movement. By driving the pressure holding head 100 through the drive assembly 200, the range of the gap between adjacent air outlets 120 is better covered, meaning the movement trajectory of the air outlets 120 allows for a more uniform distribution of high-pressure gas on the working surface 110.

[0026] When using the pressure-holding device provided by this invention for pressure holding, the pressure-holding head 100 is first positioned directly opposite the surface of the workpiece to be pressure-held, but not in contact with it, maintaining a gap between the working surface 110 of the pressure-holding head 100 and the surface. The air inlet 130 is connected to the air outlet device, allowing the high-pressure gas output from the air outlet device to enter the pressure-holding head 100 through the air inlet 130 and exit through the air outlets 120. Simultaneously, the driving component 200 drives the pressure-holding head 100 to move, forming a high-pressure gas distribution between the working surface 110 and the surface of the workpiece to be pressure-held, thus achieving gas pressure holding on the surface of the workpiece. After a certain pressure holding time, stopping the gas supply to the air inlet 130 completes the pressure holding process. In summary, the pressure-holding device provided by this invention achieves non-contact pressure holding, eliminating the risk of pressure damage to the surface of the workpiece. Furthermore, non-contact pressure holding reduces the conformal accuracy requirements of the working surface 110 of the pressure-holding head 100, and is not limited by the shape, structure, curvature, or other characteristics of the product. It can also achieve simultaneous pressure maintenance at multiple points, has low space requirements, and has a wide range of applications.

[0027] In some embodiments, the working surface 110 is further provided with a plurality of suction holes 140, which are respectively located at the edges of the working surface 110. The pressure holding head 100 is provided with a suction port 150, which communicates with each suction hole 140 and is used to connect an external suction device. A single suction port 150 can be provided, with each suction hole 140 communicating with it, or multiple suction ports 150 can be provided, with each suction hole 140 communicating with its corresponding suction port 150. The suction port 150 is used to connect an external suction device for drawing gas; this device can be a negative pressure pump or a fan, etc. By providing suction holes 140, which cooperate with the outlet holes 120 and recover the gas discharged from the outlet holes 120, it is easier to control the gas flow path, so that the high-pressure gas is more evenly distributed on the working surface 110, and it is also easier to control the holding pressure formed by the high-pressure gas. In addition, by placing the air intake 140 at the edge of the working surface 110 and the air outlet 120 at the center of the working surface 110, it is possible to prevent some thinner products from warping during the pressure holding process.

[0028] In some embodiments, please refer to Figures 4-6 Within the pressure holding head 100, an outlet channel 160 is provided corresponding to each outlet 120 to communicate with the inlet 130, and an intake channel 170 is provided corresponding to each intake hole 140 to communicate with the intake port 150. The outlet channel 160 and intake channel 170 can be either grooves formed within the pressure holding head 100 or pipes located inside the pressure holding head 100. Specifically, the outlet channel 160 can be a single airflow channel connected to the inlet 130 branching into several airflow channels, each communicating with one of the outlet holes 120. Specifically, the intake channel 170 can be a single airflow channel formed by several airflow channels communicating with each intake hole 140 converging into a single airflow channel communicating with the intake port 150. Specifically, the lengths of the airflow channels connected to each outlet hole 120 are as similar as possible to ensure that the gas pressure at each outlet hole 120 is as equal as possible.

[0029] In some embodiments, at least one row of air outlets 120 is provided in the middle of the working surface 110, and a row of suction holes 140 is provided on both sides of the array formed by the air outlets 120. Each suction hole 140 in each row corresponds one-to-one with each air outlet 120 in the adjacent row. That is, the air outlets 120 and suction holes 140 are arranged in an array, with the outermost two rows of suction holes 140 and at least one row of air outlets 120 in the middle. The suction holes 140 correspond one-to-one with each air outlet 120 in the adjacent row of air outlets 120, specifically, they can be arranged directly opposite each other. With the above arrangement, the gas discharged from the air outlets 120 flows to both sides under the action of the suction holes 140 on both sides, thereby forming a more uniform gas distribution within the range of the working surface 110. In other embodiments, the suction holes 140 and air outlets 120 are not limited to the above array distribution.

[0030] In some embodiments, both the suction port 150 and the air inlet 130 are located on the end face of the pressure holding head 100 opposite to the working surface 110. The suction port 150 and the air inlet 130 being located on the same side of the pressure holding head 100 facilitates connection to external devices, such as connecting to a suction device and an exhaust device respectively via flexible hoses. In other embodiments, the suction port 150 and the air inlet 130 may also be located on different end faces of the pressure holding head 100.

[0031] In some embodiments, the drive assembly 200 includes a first drive component 210, which drives the pressure-holding head 100 to reciprocate in a first direction, the first direction being the distance direction between two of the air outlets 120. It is understood that movement in the first direction includes both movement along the first direction and movement that generates a displacement component in the first direction. When an air intake 140 is provided, the gas discharged from the air outlets 120 flows towards the air intake 140, resulting in less gas distribution along the distance direction between the two air outlets 120. Therefore, by providing the first drive component 210 to drive the pressure-holding head 100 to reciprocate in the first direction, the movement trajectory of the air outlets 120 can better cover the gap range between adjacent air outlets 120 in the first direction, thereby making the high-pressure gas more evenly distributed on the working surface 110 and improving the pressure-holding effect. With the air outlets 120 and air intakes 140 arranged in an array, and each air intake 140 directly opposite an adjacent row of air outlets 120, the first direction is along the row direction of the air outlets 120 and also perpendicular to the direction of distance between the air intakes 140 and the air outlets 120. Of course, even without the air intakes 140, the first driving component can still ensure a more uniform distribution of high-pressure gas on the working surface 110, improving the pressure-holding effect.

[0032] In some embodiments, the first driving component 210 includes a swing cylinder, the output shaft of which is connected to the pressure holding head 100 to drive the pressure holding head 100 to swing. The swing axis of the pressure holding head 100 is perpendicular to the distance direction of two of the aforementioned air outlets 120. Specifically, the output shaft of the swing cylinder is connected to the pressure holding head 100 via a connecting shaft 250. By driving the pressure holding head 100 to swing through the swing cylinder, the movement trajectory of the air outlets 120 can better cover the gap range of adjacent air outlets 120 in the first direction. Furthermore, the swinging manner of the pressure holding head 100 can better adapt to the arc-shaped working surface 110, thereby reducing the impact of the movement on the distance between the air outlets 120 and the surface of the workpiece to be pressure-held. The specific swing amplitude of the pressure holding head 100 can be set as needed, generally a small swing angle is sufficient. In other embodiments, the first driving component 210 can also be a telescopic cylinder to drive the pressure holding head 100 to move linearly, thereby better adapting to the planar working surface 110.

[0033] In some embodiments, the drive assembly 200 includes a second drive component 220, which drives the pressure-holding head 100 to reciprocate in a second direction, perpendicular to the first direction. It is understood that movement in the second direction includes both movement along the second direction and movement that generates a displacement component in the second direction. By providing the second drive component 220 to drive the pressure-holding head 100 to reciprocate in the second direction, the movement trajectory of the vent 120 can better cover the area in the second direction where no vent 120 is provided, thereby making the high-pressure gas more evenly distributed on the working surface 110 and improving the pressure-holding effect. The stroke of the second drive component 220 is set as needed, generally a smaller stroke is sufficient. When the drive assembly 200 includes a first drive component 210 and a second drive component 220, the first drive component 210 can be located at the output end of the second drive component 220, and the pressure-holding head 100 can be located at the output end of the first drive component 210, or the second drive component 220 can be located at the output end of the first drive component 210, and the pressure-holding head 100 can be located at the output end of the second drive component 220. When the first drive component 210 employs a swing cylinder, the swing axis of the swing cylinder is along the second direction.

[0034] In some embodiments, the second driving component 220 includes a telescopic cylinder, and a guide rail 230 is provided in cooperation with the telescopic cylinder. The first driving component 210 is slidably disposed on the guide rail 230, and the guide rail 230 extends along a second direction. The telescopic cylinder drives the first driving component 210 to reciprocate along the guide rail 230. The guide rail 230 supports and guides the movement of the second driving component 220, making its movement smoother. Furthermore, the telescopic cylinder driving structure is simple. In other embodiments, the second driving component 220 may also be a motor-driven linear guide or other similar device.

[0035] In some embodiments, the drive assembly 200 further includes a connector 240, with the first drive component 210 disposed on the connector 240, which is slidably disposed on the guide rail 230. The connector 240 facilitates the connection between the first drive component 210 and the second drive component 220, enabling assembly. Specifically, the connector 240 is L-shaped, with one side of the L-shape engaging with the guide rail 230, such as connecting with a slider on the guide rail 230, and the other side of the L-shape engaging with the first drive component 210. A through hole is provided on the other side of the L-shape. When the second drive component 220 is a swing cylinder, the output shaft of the swing cylinder passes through the through hole to connect with the pressure holding head 100.

[0036] In some embodiments, the air inlet 130 is connected to the air intake 150 via an external channel to form an airflow loop. That is, by connecting the air inlet 130 and the air intake 150 via an external channel, the gas recovered through the air intake 150 can re-enter through the air inlet 130 and be discharged through the air outlet 120, thus forming a gas cycle, which helps to save costs. The external channel can specifically be a flexible hose. In other embodiments, the air inlet 130 and the air intake 150 may not be connected.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure-holding device, characterized in that, include: The pressure holding head (100) has a working surface (110) that conforms to the shape of the workpiece to be pressure held. The working surface (110) is provided with a plurality of air outlets (120), and the pressure holding head (100) is provided with an air inlet (130). The air inlet (130) is connected to each of the air outlets (120), and the air inlet (130) is used to connect to an external air outlet device. A drive assembly (200) is provided, the output of which is connected to the pressure holding head (100) to drive the pressure holding head (100) to move. The working surface (110) is also provided with a plurality of air intake holes (140), which are located at the edges of the working surface (110). The pressure holding head (100) is provided with an air intake port (150), which is connected to each of the air intake holes (140). The air intake port (150) is used to connect an external air intake device.

2. The pressure-holding device according to claim 1, characterized in that, The working surface (110) is provided with at least one row of air outlets (120) in the middle. The array of air outlets (120) is provided with one row of air intakes (140) on each side. Each air intake (140) in each row is respectively provided in correspondence with the adjacent row of air outlets (120).

3. The pressure-holding device according to claim 1, characterized in that, Both the air intake (150) and the air inlet (130) are located on the end face of the pressure holding head (100) opposite to the working surface (110).

4. The pressure-holding device according to any one of claims 1-3, characterized in that, The drive assembly (200) includes a first drive component (210) for driving the pressure holding head (100) to reciprocate in a first direction along the distance between two of the air outlets (120).

5. The pressure-holding device according to claim 4, characterized in that, The first driving component (210) includes a swing cylinder, the output shaft of which is connected to the pressure holding head (100) to drive the pressure holding head (100) to swing. The swing axis of the pressure holding head (100) is perpendicular to the distance direction of two of the air outlets (120).

6. The pressure-holding device according to claim 4, characterized in that, The drive assembly (200) includes a second drive component (220) for driving the pressure holding head (100) to reciprocate in a second direction, which is perpendicular to the first direction.

7. The pressure-holding device according to claim 6, characterized in that, The second driving component (220) includes a telescopic cylinder and a guide rail (230) is provided in cooperation with the telescopic cylinder. The first driving component (210) is slidably disposed on the guide rail (230) and the guide rail (230) extends along the second direction.

8. The pressure-holding device according to claim 7, characterized in that, It also includes a connector (240), the first driving component (210) is disposed on the connector (240), and the connector (240) is slidably disposed on the guide rail (230).

9. The pressure-holding device according to any one of claims 1-3, characterized in that, The air inlet (130) is connected to the air intake (150) through an external channel to form an airflow circuit.

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