Filter layer PU foaming automatic pressing device and pressing mechanism

Abstract

The utility model discloses a filter layer PU foaming automatic pressing device which comprises a bottom plate, one end of the bottom plate is fixedly connected with a connecting plate, the connecting plate is upwards and fixedly connected with a stand column, the top end of the stand column is connected with a top frame, a plurality of vertical sliding rods are vertically arranged at the operation end, away from the stand column, of the top frame in a sliding and penetrating mode, and the vertical sliding rods are arranged at intervals. The bottom end of each vertical sliding rod is downwards connected with a pressing plate, the pressing plate is horizontally arranged, each vertical sliding rod between the pressing plate and the top frame is sleeved with a spring, and the springs are used for enabling the pressing plate to downwards press the upper die and the lower die of the filter element. The top end of the vertical sliding rod located in the middle is connected with a disc piece, and a threaded hole used for being connected with an air cylinder extending rod is formed in the center of the upper surface of the disc piece. The utility model further discloses a corresponding pressing mechanism. According to the utility model, the time for adjusting the pressure clamp is saved, and the start-up of each shift is advanced by at least 30 minutes; manual pressing is not needed, labor intensity is reduced, consistency of pressing force can be kept, reduction of the filtering efficiency of an engine due to warping of four corners of the filter element is avoided, and economic benefits are obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to the pressing technology of PU foam for filter layers. Background Art

[0002] PU material (polyurethane) has high wear resistance, good elasticity, relatively high strength and toughness, and is widely used as a filter layer sealing material in filters. The PU material also has a porous structure and can also be directly used as a filter layer medium in some products. PU foaming is a common technology when the PU material is used for filter layers.

[0003] During the process of changing production of PU foaming in the traditional production line using a crimping pliers for pressing, the following disadvantages exist:

[0004] 1. It is necessary to adjust the height of the crimping pliers to ensure the pressing state of the upper and lower dies of the filter element. There are 60 small car plates that need to adjust the height of the crimping pliers before starting work. Each adjustment of the height of a small car plate takes 1 minute, and a total of 60 minutes are required to adjust the crimping pliers;

[0005] 2. Manually adjusting the height of the crimping pliers cannot ensure consistency. There are differences in the heights of the crimping pliers of each small car plate, and more glue overflows on the reverse side of some filter elements during the foaming process;

[0006] 3. The crimping pliers are repeatedly pressed every day. After a long time, the pressing device is easily damaged, the product cannot be tightly pressed, and the foaming height of the PU glue exceeds the design tolerance, affecting the filtration efficiency of the filter element of the product;

[0007] 4. The operators for inserting the filter layer and removing the mold need to manually operate the crimping pliers, resulting in a large labor intensity. More glue overflows on the reverse side of the filter element, leading to customer complaints.

[0008] During the process of changing production of PU foaming in the traditional production line using a cylinder for pressing, the following disadvantages exist:

[0009] The production line uses gear rotation, and the transition connection part is easily damaged, resulting in long-term downtime and maintenance of the production line; using a cylinder for pressing, the pressing force around the filter element is inconsistent, and the four corners are warped, leading to customer complaints. Content of the Utility Model

[0010] The purpose of the utility model is to provide an automatic pressing device for PU foaming of filter layers, which does not require a crimping pliers, saves the time for adjusting the crimping pliers; at the same time, it avoids inconsistent pressing forces around the filter element caused by relying on a cylinder for pressing and ensures the consistency of the pressing force of the workpiece (the upper and lower dies of the filter element).

[0011] To achieve the above object, the automatic pressing device for the filter layer PU foam of the present utility model includes a bottom plate. One end of the bottom plate is fixedly connected with a connecting plate. The connecting plate is fixedly connected upward with a column. The top of the column is connected with a horizontally arranged top frame. The end of the top frame away from the column is its operating end. A plurality of vertical sliding rods are vertically slidably penetrated through the operating end of the top frame. The vertical sliding rods are arranged at intervals. The bottom ends of the vertical sliding rods are all connected downward with a pressing plate. The pressing plate is horizontally arranged. Springs are sleeved on the vertical sliding rods between the pressing plate and the top frame. The springs are used to press the upper die and the lower die of the filter element downward tightly.

[0012] The top end of a vertical sliding rod located in the middle is connected with a disc member. A threaded hole for connecting the extending rod of the air cylinder is provided at the center of the upper surface of the disc member.

[0013] Each vertical sliding rod is slidably matched with the top frame through a linear bearing.

[0014] The present utility model also discloses a pressing mechanism adopting the automatic pressing device for the filter layer PU foam. The upper surface of the disc member is connected with the extending rod of the air cylinder through the threaded hole. The solenoid valve of the air cylinder is connected with the electric control device. The electric control device is connected with a first grating switch, a second grating switch and an emergency stop button. The first grating switch is installed at the position corresponding to the passing of the trolley plate at the glue injection station of the production line. The trolley plate is used for transporting the lower die after glue injection and the upper die buckled on the lower die on the production line. The second grating switch is installed at the position corresponding to the upper part of the bottom plate at the pressing station of the production line.

[0015] The upper surface of the disc member is connected with the extending rod of the air cylinder through the threaded hole. The solenoid valve of the air cylinder is connected with the electric control device. The electric control device is connected with a first grating switch, a second grating switch and an emergency stop button. The first grating switch is installed at the position corresponding to the passing of the trolley plate at the glue injection station of the production line. The trolley plate is used for transporting the lower die after glue injection and the upper die buckled on the lower die on the production line. The second grating switch is installed at the position corresponding to the upper part of the bottom plate at the pressing station of the production line.

[0016] The present utility model has the following advantages:

[0017] The structure of the present utility model is simple and convenient to use. The pressing pliers are not needed in the operation process, saving the time for adjusting the pressing pliers. The present utility model relies on the elastic force of the spring to press the upper die and the lower die of the filter element. The pressing force is uniform and stable, without human error, and can ensure the consistency of the pressing force. The present utility model presses the upper die and the lower die of the filter element downward through the pressing plate, with a large force-bearing area, and the upper die and the lower die of the filter element are stressed evenly everywhere, avoiding the situation that the pressing force around the filter element is inconsistent.

[0018] The disc member is convenient for connecting the air cylinder. Using the power of the air cylinder to lift the pressing plate and compress the spring, compared with lifting the pressing plate manually, not only greatly reduces the labor intensity, but also improves the operation efficiency, and the situation that the staff needs to rest to recover physical strength before continuing the operation will not occur.

[0019] The linear bearing facilitates the connection of the vertical sliding rods and reduces the sliding friction when the vertical sliding rods slide up and down. The grating switch can accurately sense the human hand or the trolley board, making it easy to achieve automatic control.

[0020] With the adoption of the present utility model, there is no longer a need for the adjustment time of 60 minutes for 60 trolley boards before starting work, and each shift can start at least 30 minutes earlier; there is no need for manual pressing, which not only reduces the labor intensity, but also makes it very easy to maintain the consistency of the pressing force through the elastic force of the spring; the pressing area is enlarged by pressing with the pressing plate, avoiding the warping of the four corners of the filter element and reducing the engine filtration efficiency. Description of the Drawings

[0021] Figure 1 is a schematic structural view of the present utility model.

[0022] Figure 2 is a schematic view of the electric control structure of the present utility model. Detailed Embodiment

[0023] As Figure 1 and Figure 2 shown, the automatic pressing device for the filter layer PU foam of the present utility model includes a bottom plate 1. One end of the bottom plate 1 is fixedly connected with a connecting plate 2. The connecting plate 2 is fixedly connected upward with a square steel column 3. The top end of the column 3 is connected with a horizontally arranged top frame 4. The top frame 4 is made of multiple sections of square steel; one end of the top frame 4 away from the column 3 is its operating end. A plurality of vertical sliding rods 5 are vertically slidably penetrated through the operating end of the top frame 4. The vertical sliding rods 5 are arranged at intervals. The bottom ends of the vertical sliding rods 5 are all connected downward with a pressing plate 6. The pressing plate 6 is horizontally arranged. Springs are sleeved on the vertical sliding rods 5 between the pressing plate 6 and the top frame 4. The springs are used to press the upper die and the lower die of the filter element downward by the pressing plate 6. The springs upwardly press the top frame 4 and downwardly press the pressing plate 6. The springs are of conventional technology and are not shown in the figure.

[0024] The structure of the present utility model is simple and easy to use. The pressing pliers are not required during the operation process, saving the adjustment time of the pressing pliers. The present utility model relies on the elastic force of the spring to press the upper die and the lower die of the filter element. The pressing force is uniform and stable, without human error, and can ensure the consistency of the pressing force; the present utility model presses the upper die and the lower die of the filter element downward through the pressing plate 6, with a large stress area, and the upper die and the lower die of the filter element are uniformly stressed everywhere, avoiding the situation of inconsistent pressing force around the filter element.

[0025] The top end of a vertical sliding rod 5 located in the middle is connected with a disc member 7. A threaded hole 8 for connecting the piston rod of the cylinder is provided at the center of the upper surface of the disc member 7.

[0026] The disc part 7 facilitates the connection of the air cylinder. By using the power of the air cylinder to lift the pressing plate 6 and compress the spring, compared with lifting the pressing plate 6 manually, it not only greatly reduces the labor intensity but also improves the operation efficiency, and there will be no situation where the staff needs to take a break to restore physical strength before continuing the operation.

[0027] Each vertical slide bar 5 is slidably engaged with the top frame 4 through a linear bearing 9.

[0028] The linear bearing 9 facilitates the connection of the vertical slide bar 5 and reduces the sliding friction when each vertical slide bar 5 slides up and down.

[0029] The present utility model also discloses a pressing mechanism adopting the pressing device of the filter layer PU foam. The upper surface of the disc part 7 is connected to the extending rod of the air cylinder through a threaded hole 8, and the solenoid valve 11 of the air cylinder is connected to the electric control device 10; the electric control device 10 is an integrated circuit or a single-chip microcomputer; the electric control device 10 is connected with a first grating switch 12, a second grating switch 13 and an emergency stop button 14; the first grating switch 12 is installed at the position corresponding to the passing of the trolley board at the glue injection station of the production line. The trolley board is used to transport the lower die after glue injection and the upper die buckled on the lower die on the production line; the second grating switch 13 is installed at the position above the bottom plate 1 corresponding to the pressing station of the production line. The emergency stop button 14 is installed beside the second grating switch 13. When the product is out of position or there is a phenomenon of pressing deviation, the worker can stop the machine at any time through the emergency stop button 14. After receiving the signal of the emergency stop button 14, the electric control device controls the air cylinder to pull the pressing plate to rise, avoiding safety accidents.

[0030] The grating switch can accurately sense the human hand or the trolley board, which is easy to realize automatic control.

[0031] By adopting the present utility model, it is no longer necessary to adjust the pressing tongs for a total of 60 minutes with 60 trolley boards before starting work, and the start of each shift is at least 30 minutes earlier; there is no need for manual pressing, which not only reduces the labor intensity but also easily maintains the consistency of the pressing force through the elastic force of the spring; the pressing area is enlarged by pressing with the pressing plate 6, avoiding the reduction of the engine filtration efficiency caused by the warping of the four corners of the filter element.

[0032] During operation, the staff at the glue injection station place the lower mold filled with glue (PU) on the platform, then buckle the upper mold onto the lower mold, and send the buckled upper and lower molds together under the pressing plate 6. The semi-finished product is pressed tightly by the self-weight of the pressing plate 6 and the spring tension. Specifically, the first grating switch 12 can detect the passing of the trolley plate at the glue injection station; the next station where the trolley plate moves downward on the production line is the pressing station; after the first grating switch 12 detects the passing of the trolley plate through the glue injection station, it sends a signal to the electric control device 10, and the electric control device 10 controls the action of the cylinder solenoid valve 11, so that the cylinder drives the pressing plate 6 to rise upward through the vertical slide rod 5, thereby allowing the trolley plate carrying the upper and lower molds to come to the bottom plate 1; of course, this process can also be manually controlled, that is, the staff at the pressing station controls the cylinder to drive the pressing plate 6 to rise upward every time they see a trolley plate coming, but this will correspondingly increase the labor intensity.

[0033] At the pressing station, the staff manually place the trolley plate and the lower and upper molds it carries. During this process, the second grating switch 13 detects the presence of the human hand. After placing them, the staff's hand leaves the lower and upper molds, and the second grating switch 13 no longer detects the human hand and sends a signal to the electric control device 10. The electric control device 10 controls the action of the cylinder solenoid valve 11, so that the cylinder extension rod no longer applies an upward pulling force to the disc member 7 and the vertical slide rod 5. Under the action of the spring elasticity, the pressing plate 6 presses the upper and lower molds of the filter element downward, and through large-area pressing, it avoids the problem of warping at the four corners caused by inconsistent pressing forces around the filter element. Of course, this process can also be manually controlled, that is, after the staff at the pressing station place the trolley plate and the lower and upper molds it carries, they manually control the cylinder to no longer apply an upward pulling force, so that the pressing plate 6 presses the upper and lower molds downward under the action of the spring force.

[0034] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. Filter layer PU foam automatic pressing device, including a bottom plate, characterized in that: One end of the bottom plate is fixedly connected with a connecting plate, the connecting plate is fixedly connected upward with a column, the top of the column is connected with a horizontally arranged top frame, the end of the top frame far away from the column is its operating end, and a plurality of vertical sliding rods are vertically slidably penetrated through the operating end of the top frame. The vertical sliding rods are arranged at intervals, and the bottom ends of the vertical sliding rods are all connected downward with a pressing plate. The pressing plate is horizontally arranged, and springs are sleeved on the vertical sliding rods between the pressing plate and the top frame. The springs are used to press the upper die and the lower die of the filter element downward tightly.

2. The automatic pressing device for PU foam of the filter layer according to claim 1, wherein: The top end of a vertical sliding rod located in the middle is connected with a disc member, and a threaded hole for connecting the extending rod of the air cylinder is arranged at the center of the upper surface of the disc member.

3. The automatic pressing device for PU foam of the filter layer according to claim 1, wherein: Each vertical sliding rod is slidably matched with the top frame through a linear bearing.

4. Adopt the pressing mechanism of the filter layer PU foaming automatic pressing device described in claim 2, characterized in that: The upper surface of the disc member is connected with the extending rod of the air cylinder through a threaded hole, and the solenoid valve of the air cylinder is connected with the electric control device; the electric control device is connected with a first grating switch, a second grating switch and an emergency stop button; the first grating switch is installed at the position corresponding to the passing of the trolley plate at the glue injection station of the production line. The trolley plate is used for transporting the lower die after glue injection and the upper die buckled on the lower die on the production line; the second grating switch is installed at the position corresponding to the upper part of the bottom plate at the pressing station of the production line.

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