Process and device for improving compression performance of polyurethane foam

Abstract

The invention discloses a process and device for improving the compression performance of polyurethane foam, and relates to the technical field of polyurethane foam processing.The device comprises a mold base and a shaking assembly, the top of one end of the mold base is rotationally connected with a heating upper mold, a heating lower mold is arranged below the heating upper mold, and the shaking assembly is arranged on the side portion of the mold base; and the shaking assembly comprises side shafts, the side shafts are symmetrically fixed to the two sides of the mold base, and side frames are rotationally connected to the outer sides of the middles of the side shafts. The motor drives the mold to rotate to be combined with a lever structure formed by the counterweight plate, bidirectional composite motion of materials is achieved, rotation promotes uniform distribution of components, gravity center shift of the counterweight plate triggers the mold to shake in a reciprocating mode to eliminate density difference, bubble gathering and component sedimentation are effectively prevented through the design, and the structural homogeneity of polyurethane foam is remarkably improved; meanwhile, the cell merging sensitive period is accurately avoided, the rebound resilience and compressive strength of the product are guaranteed from the process source, and the permanent deformation risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane foam processing, in particular to a process and a device for improving the compression performance of polyurethane foam. Background Art

[0002] Polyurethane foam is a high-molecular polymer made from isocyanate and polyether as the main raw materials, mixed and foamed through special equipment with the action of various additives such as foaming agents, catalysts, and flame retardants. Compression performance refers to the material's ability to resist deformation under pressure and is a key indicator for the use of rigid foam in load-bearing or energy-absorbing structures.

[0003] Currently, in the production process of polyurethane prefabricated foam, it is usually necessary to add polyurethane foam raw materials into the foaming mold and then let it sit for foaming and molding. However, during static foaming, the effect of gravity will cause uneven density distribution. The heavier components will sink, while the bubbles tend to float up, which results in higher density at the bottom of the foam and lower density at the top of the foam. This uneven stress distribution leads to a decrease in overall compressive strength and an increase in permanent compression set. Summary of the Invention

[0004] The object of the present invention is to provide a process and an apparatus for improving the compressibility of polyurethane foam, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a process for improving the compression performance of polyurethane foam, comprising the following steps: Step 1: The electric cylinder pushes the drive block, and the heated lower mold will first move vertically downward. Then the drive frame pulls down the connecting plate to rotate the heated upper mold, automatically separating the heated upper mold from the heated lower mold. At the same time, the support legs will rotate vertically to support the bottom of the mold base. Step 2: The worker injects the raw material into the heated lower mold and then contracts the electric cylinder. Similarly, the legs automatically retract into the bottom of the mold base. After the heated upper mold rotates to a horizontal position, the heated lower mold automatically moves up to close. Step 3: Start the motor and drive the mold base to rotate through the side shaft. The heated upper mold and the heated lower mold will rotate slowly. At the same time, the center of gravity of the counterweight plate can be changed, so that the mold base can rock back and forth while slowly rotating around the side shaft. Step 4: The side shaft will also drive the rotating disk to rotate. When the roller passes through the groove, the heated upper mold and the heated lower mold will automatically vibrate, and the compression spring will be used to increase the shaking amplitude of the side frame; Step 5: After the heated upper mold and the heated lower mold heat the material to make it gel, the motor stops working. After the foaming is completed, the heated upper mold and the heated lower mold are separated by the mold opening assembly for unloading.

[0006] Furthermore, it includes a mold base and a shaking assembly, the top of one end of the mold base is rotatably connected to a heated upper mold, and a heated lower mold is provided below the heated upper mold, the shaking assembly is provided on the side of the mold base, and the shaking assembly includes a side shaft, the side shafts are symmetrically fixed on both sides of the mold base, and the middle outer side of the side shaft is rotatably connected to a side frame, a motor is placed on one side of the side frame, and the output shaft of the motor is fixedly connected to the side shaft, a bevel gear set is provided on the middle outer side of the side shaft, and a rotating shaft is placed on the top of the bevel gear set, and a counterweight plate is fixed on the top of the rotating shaft, the bottom of the side frame is connected to a telescopic column, and the bottom of the telescopic column is fixed to a bottom frame, both sides of the bottom frame are rotatably connected to a base, and a buffer pad is placed on one side of the base.

[0007] Furthermore, a shaking assembly is provided on the outer side of one end of the side shaft, and the shaking assembly includes a rotating disk. A rotating disk is fixed on the outer side of one end of the side shaft, and a groove is provided on the outer side of the rotating disk. A roller is provided on the bottom of the rotating disk, and the end of the roller is rotatably connected to a fixed seat. A compression spring is provided on the outer side of the telescopic column.

[0008] Furthermore, the fixing seat is fixedly connected to the bottom frame, and the bottom frame abuts against the compression spring.

[0009] Furthermore, a mold opening assembly is provided at the bottom of the mold base, and the mold opening assembly includes an electric cylinder. The electric cylinder is fixed to the bottom of the mold base, and one end of the electric cylinder is connected to a driving block. Guide grooves are provided on both sides of the driving block, and the guide grooves are composed of oblique grooves and straight grooves.

[0010] Furthermore, the interior of the guide groove is slidably connected to a driving frame, and the upper portion of the driving frame is slidably connected to a connecting plate, and the connecting plate is fixedly connected to the heating upper mold.

[0011] Furthermore, the driving frame is a rectangular structure, and the driving frame is slidably connected to the mold base.

[0012] Furthermore, a synchronization plate is fixed on the top of the driving block, and a support block is placed on the outside of the synchronization plate. The top of the support block is slidably connected to a limit block, and the limit block is fixedly connected to the heating lower mold.

[0013] Furthermore, sliding columns are arranged at the four ends of the bottom of the heating lower mold, and the sliding columns are slidably connected to the mold base, and a return spring is sleeved on the outer side of the lower part of the sliding column.

[0014] Furthermore, limiting plates are fixed on both sides of the driving block, and a support foot is slidably connected to the top of one end of the limiting plate. A gear shaft is fixed inside one end of the support foot, and the gear shaft is rotatably connected to the mold base. The tooth portion of the gear shaft is engaged with a tooth plate, and the tooth plate is fixedly connected to the limiting plate.

[0015] The present invention provides a process and apparatus for improving the compressibility of polyurethane foam, which has the following beneficial effects: 1. The lever structure formed by the motor-driven mold rotation and the counterweight plate of the present invention realizes two-way compound movement of the material. The rotation promotes uniform distribution of components, and the offset of the center of gravity of the counterweight plate triggers the reciprocating shaking of the mold to eliminate density differences. This design effectively prevents bubble aggregation and component sedimentation, significantly improving the homogeneity of the polyurethane foam structure, while accurately avoiding the sensitive period of bubble merging, ensuring the product's rebound performance and compressive strength from the source of the process, and reducing the risk of permanent deformation.

[0016] 2. The grooves of the rotating disk and the roller of the present invention cooperate with the compression spring to amplify the amplitude, and the mold rotates synchronously to generate vibration, thereby enhancing the fluidity of the material and optimizing the distribution of the pores. This structure realizes the coordination of physical mixing and chemical foaming timing, eliminates local weak areas and improves the compression performance of the polyurethane foam after molding.

[0017] 3. The mold opening and closing mechanism of the present invention controls the action sequence in steps through the guide groove. The straight groove drives the vertical separation of the heated upper mold and the heated lower mold, and the inclined groove drives the connecting plate to realize the rotational separation of the upper mold. At the same time, the tooth plate links the support legs to automatically expand and support the mold base. The support legs are automatically retracted when the mold is closed. This design ensures the stability of the equipment during the material removal process. At the same time, it integrates the mold opening avoidance, rotation parting, and bottom support functions into a single drive source, greatly improving operational safety and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall three-dimensional structure of the device for improving the compression performance of polyurethane foam according to the present invention; Figure 2 A schematic diagram of the structure of a shaking component portion of the device for improving the compression performance of polyurethane foam according to the present invention; Figure 3 Schematic diagram of the overall bottom-up stereoscopic structure of the device for improving the compressibility of polyurethane foam according to the present invention; Figure 4 This is a schematic diagram of the rear perspective structure of the mold opening assembly of the device for improving the compression performance of polyurethane foam according to the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the limiting block of the device for improving the compression performance of polyurethane foam according to the present invention; Figure 6 This is a bottom-up perspective structural diagram of a mold base of a device for improving the compression performance of polyurethane foam according to the present invention; In the figure: 1. mold base; 2. heated upper mold; 3. heated lower mold; 4. shaking assembly; 401. side shaft; 402. side frame; 403. motor; 404. bevel gear set; 405. rotating shaft; 406. counterweight plate; 407. telescopic column; 408. bottom frame; 409. base; 410. buffer pad; 5. shaking assembly; 501. rotating disk; 502. groove; 503. roller; 504. fixed seat; 505. compression spring; 6. mold opening assembly; 601. electric cylinder; 602. drive block; 603. guide groove; 604. drive frame; 605. connecting plate; 606. synchronization plate; 607. support block; 608. limit block; 609. slide column; 610. reset spring; 7. limit plate; 8. support foot; 9. gear shaft; 10. tooth plate. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0020] A process for improving the compressibility of polyurethane foam, comprising the following steps: Step 1: The electric cylinder 601 pushes the driving block 602, and the heated lower mold 3 first moves vertically downward. Then, the driving frame 604 pulls down the connecting plate 605 to rotate the heated upper mold 2, automatically separating the heated upper mold 2 from the heated lower mold 3. At the same time, the supporting legs 8 rotate vertically to support the bottom of the mold base 1. Step 2: The worker injects the raw material into the heated lower mold 3 and then contracts the electric cylinder 601. Similarly, the legs 8 are automatically retracted into the bottom of the mold base 1. After the heated upper mold 2 rotates to a horizontal position, the heated lower mold 3 automatically moves up to close. Step 3: Start the motor 403, which drives the mold base 1 to rotate via the side shaft 401. The heated upper mold 2 and the heated lower mold 3 will rotate slowly, and at the same time, the center of gravity of the counterweight plate 406 will be changed, so that the mold base 1 can rock back and forth while slowly rotating around the side shaft 401. Step 4: The side shaft 401 also drives the rotating disk 501 to rotate. When the roller 503 passes through the groove 502, the heated upper mold 2 and the heated lower mold 3 are automatically shaken, and the compression spring 505 is used to increase the shaking amplitude of the side frame 402; Step 5: After the heated upper mold 2 and the heated lower mold 3 heat the material to make it gel, the motor 403 stops working. After the foaming is completed, the heated upper mold 2 and the heated lower mold 3 are separated by the mold opening assembly 6 for unloading.

[0021] See also Figures 1 to 2The present invention provides a technical solution: a process and device for improving the compression performance of polyurethane foam, comprising a mold base 1 and a shaking assembly 4, wherein the top of one end of the mold base 1 is rotatably connected to a heated upper mold 2, and a heated lower mold 3 is provided below the heated upper mold 2, the shaking assembly 4 is provided on the side of the mold base 1, and the shaking assembly 4 includes a side shaft 401, the side shafts 401 are symmetrically fixed on both sides of the mold base 1, and the middle outer side of the side shaft 401 is rotatably connected to a side frame 402, and a motor is placed on one side of the side frame 402 403, and the output shaft of the motor 403 is fixedly connected to the side shaft 401, a bevel gear set 404 is provided on the outer side of the middle part of the side shaft 401, and a rotating shaft 405 is placed on the top of the bevel gear set 404, and a counterweight plate 406 is fixed to the top of the rotating shaft 405, a telescopic column 407 is connected to the bottom of the side frame 402, and a bottom frame 408 is fixed to the bottom of the telescopic column 407, and a base 409 is rotatably connected to both sides of the base 408, and a buffer pad 410 is placed on one side of the base 409; The specific operation is as follows: after the raw materials are injected into the heated lower mold 3 and the mold is closed, the motor 403 can be started to drive the mold base 1 to rotate through the side shaft 401, so that the heated upper mold 2 and the heated lower mold 3 can be rotated slowly. The force generated by the rotation can promote the flow and further mixing of the materials in the mold, prevent the heavier components from sinking and the bubbles from floating excessively, and reduce the formation of large bubbles or cavities. At the same time, during the rotation of the side shaft 401, the rotating shaft 405 will also be driven to rotate through the bevel gear set 404, so that the center of gravity position of the counterweight plate 406 can be changed, and when the left When the center of gravity of the counterweight plates 406 on both sides is located on the right side of the rotating shaft 405, according to the principle of leverage, the right end of the bottom frame 408 will be heavier, and the bottom frame 408 will rotate clockwise with the upper end connection of the base 409 as the axis. At the same time, the buffer pad 410 will limit the rotation range. When the center of gravity of the counterweight plates 406 on both sides is located on the left side of the rotating shaft 405, the bottom frame 408 will rotate counterclockwise, so that during the process of slow rotation of the mold base 1 with the side shaft 401 as the axis, it can also swing back and forth, thereby avoiding uneven mixing of materials at the left and right ends inside the mold.

[0022] See also Figures 3 to 5 A shaking assembly 5 is provided on the outside of one end of the side shaft 401, and the shaking assembly 5 includes a rotating disk 501. The rotating disk 501 is fixed on the outside of one end of the side shaft 401, and a groove 502 is opened on the outside of the rotating disk 501. A roller 503 is provided at the bottom of the rotating disk 501, and the end of the roller 503 is rotatably connected to a fixed seat 504. A compression spring 505 is sleeved on the outside of the telescopic column 407, and the fixed seat 504 is fixedly connected to the bottom frame 408, and the bottom frame 408 abuts against the compression spring 505. The specific operation is as follows: during the rotation of the side shaft 401, it will also drive the rotating disk 501 to rotate. At this time, since the rotating disk 501 is tightly fitted with the roller 503, and the roller 503 is fixedly connected to the bottom frame 408, when the roller 503 moves to the groove 502, the distance between the side frame 402 and the bottom frame 408 will be shortened, and when the roller 503 moves out of the groove 502, the distance between the side frame 402 and the bottom frame 408 will increase, and the compression spring 505 is used to increase the shaking amplitude of the side frame 402, so that the heating Mold 2 and the heated lower mold 3 are automatically shaken to further improve the fluidity of the internal raw materials, enhance the overall mixing effect, and make the density distribution uniform. The stress distribution of the polyurethane foam produced subsequently is more uniform, and there are no particularly weak areas that are over-compressed and irreversibly damaged. Therefore, the foam has a better ability to recover its original shape after being compressed, and the compression permanent deformation value is reduced. Since the low-density area is eliminated, the overall average compression strength is usually increased. At the same time, the mixing operation is only performed in the early stage of foaming, and stops after the material gels, avoiding the sensitive period of bubble merging.

[0023] See also Figure 6 , a mold opening assembly 6 is provided at the bottom of the mold base 1, and the mold opening assembly 6 includes an electric cylinder 601, an electric cylinder 601 is fixed to the bottom of the mold base 1, and one end of the electric cylinder 601 is connected to a driving block 602, guide grooves 603 are provided on both sides of the driving block 602, and the guide grooves 603 are composed of oblique grooves and straight grooves, the inside of the guide grooves 603 is slidably connected to a driving frame 604, and the upper part of the driving frame 604 is slidably connected to a connecting plate 605, and the connecting plate 605 is fixedly connected to the heated upper mold 2, the driving frame 604 is a rectangular structure, and the driving frame 604 is slidably connected to the mold base 1, a synchronization plate 606 is fixed on the top of the driving block 602, and at the same time A support block 607 is arranged on the outside of the step plate 606, and the top of the support block 607 is slidably connected to the limit block 608, and the limit block 608 is fixedly connected to the heating lower mold 3. The four ends of the bottom of the heating lower mold 3 are arranged with sliding columns 609, and the sliding columns 609 are slidably connected to the mold base 1, and a return spring 610 is sleeved on the lower outer side of the sliding column 609. Limiting plates 7 are fixed on both sides of the driving block 602, and the top of one end of the limiting plate 7 is slidably connected to a support leg 8. A gear shaft 9 is fixed inside one end of the support leg 8, and the gear shaft 9 is rotatably connected to the mold base 1. The tooth portion of the gear shaft 9 is engaged with a tooth plate 10, and the tooth plate 10 is fixedly connected to the limiting plate 7; The specific operation is as follows: when the mold is opened, the electric cylinder 601 will push the driving block 602, and the lower part of the driving frame 604 will first slide in the straight groove of the guide groove 603. At the same time, the driving block 602 will also drive the support block 607 to avoid the limit block 608 through the synchronous plate 606. The sliding column 609 can push the return spring 610 to drive the heating lower mold 3 to move vertically downward, and move part of the convex part of the heating lower mold 3 out of the heating upper mold 2 to avoid collision and interference when the heating lower mold 3 is rotated subsequently. After that, when the lower part of the driving frame 604 moves to the oblique groove part of the guide groove 603, the driving frame 604 will pull down the connecting plate 605 to allow the heating The heated upper mold 2 rotates, automatically separating the heated upper mold 2 from the heated lower mold 3, making it convenient to take out and add materials. During this process, the limit plate 7 will also avoid the bottom of the support leg 8, and when the teeth of the tooth plate 10 engage with the gear shaft 9, the support leg 8 can be driven to rotate vertically, and its bottom will contact the ground, thereby supporting the bottom of the mold base 1, preventing the mold base 1 from tilting and shaking when taking materials, thereby improving the stability during operation. Similarly, when closing the mold, the support leg 8 can be automatically retracted into the bottom of the mold base 1, and after the heated upper mold 2 rotates to a horizontal state, the heated lower mold 3 can automatically move up and close, thereby improving the convenience of operation.

[0024] In summary, when the process and device for improving the compression performance of polyurethane foam are used, the electric cylinder 601 first pushes the driving block 602, and the lower part of the driving frame 604 will first slide in the straight groove of the guide groove 603. At the same time, the driving block 602 will also drive the support block 607 to avoid the limit block 608 through the synchronization plate 606. The sliding column 609 can then push the return spring 610 to drive the heated lower mold 3 to move vertically downward, removing part of the protrusion of the heated lower mold 3 from the heated upper mold 2. Secondly, when the lower part of the driving frame 604 moves to the inclined groove part of the guide groove 603, the driving frame 604 will pull down the connecting plate 605 to rotate the heated upper mold 2, automatically separating the heated upper mold 2 from the heated lower mold 3. During this process, the limit plate 7 will also avoid the bottom of the support leg 8, and when the teeth of the tooth plate 10 are engaged with the gear shaft 9, the support leg 8 can be driven to rotate vertically, and its bottom will contact the ground, thereby supporting the bottom of the mold base 1 to prevent the mold base 1 from tilting and shaking. At this time, the staff injects the raw material into the heated lower mold 3 and then contracts the electric cylinder 601. Similarly, the support leg 8 can be automatically retracted into the bottom of the mold base 1. After the heated upper mold 2 rotates to a horizontal state, the heated lower mold 3 can automatically move up to close. Then, the motor 403 is started to drive the mold base 1 to rotate through the side shaft 401, so that the heated upper mold 2 and the heated lower mold 3 can be rotated slowly. The force generated by the rotation can promote the flow and further mixing of the materials in the mold, prevent the heavier components from sinking and the bubbles from floating excessively, and reduce the formation of large bubbles or cavities. At the same time, during the rotation of the side shaft 401, it will also drive the rotating shaft 405 to rotate through the bevel gear set 404, so that the center of gravity position of the counterweight plate 406 can be changed, and when the counterweight plates 406 on the left and right sides are When the center of gravity of the counterweight plates 406 on both sides is located to the left of the rotating shaft 405, the bottom frame 408 will rotate counterclockwise, thereby allowing the mold base 1 to rock back and forth while rotating slowly about the side shaft 401, thereby preventing uneven mixing of materials at the left and right ends of the mold. Afterwards, the side shaft 401 will also drive the rotating disk 501 to rotate during the rotation process. At this time, since the rotating disk 501 is tightly fitted with the roller 503, and the roller 503 is fixedly connected to the bottom frame 408, when the roller 503 moves to the groove 502, the distance between the side frame 402 and the bottom frame 408 will be shortened, and when the roller 503 moves out of the groove 502, the distance between the side frame 402 and the bottom frame 408 will be increased. The compression spring 505 is used to increase the shaking amplitude of the side frame 402, so that the heated upper mold 2 and the heated lower mold 3 can be automatically shaken, further improving the fluidity of the internal raw materials, enhancing the overall mixing effect, and making the density distribution uniform. The stress distribution of the polyurethane foam produced subsequently is more uniform, and there is no particularly weak area that suffers from excessive compression and irreversible damage. Therefore, the foam has a better ability to recover to its original shape after being compressed, and the compression permanent deformation value is reduced. Since the low-density area is eliminated, the overall average compressive strength is usually increased. At the same time, the mixing operation is only performed in the early stage of foaming and stops after the material gels, avoiding the sensitive period of bubble merging. Finally, after foaming is completed, the heated upper mold 2 and the heated lower mold 3 are separated by the mold opening assembly 6 to unload the molded polyurethane foam.

[0025] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0026] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A process for improving the compressibility of polyurethane foam, characterized in that: The following steps are involved: Step 1: The electric cylinder (601) pushes the driving block (602), and the heating lower mold (3) will first move vertically downward, and then the driving frame (604) pulls down the connecting plate (605) to rotate the heating upper mold (2), automatically separating the heating upper mold (2) from the heating lower mold (3), and at the same time, the supporting legs (8) will rotate vertically to support the bottom of the mold base (1); Step 2: The staff injects the raw material into the heated lower mold (3), and then contracts the electric cylinder (601). Similarly, the legs (8) can be automatically retracted into the bottom of the mold base (1), and after the heated upper mold (2) is rotated to a horizontal state, the heated lower mold (3) can automatically move up to close; Step 3: Start the motor (403) to drive the mold base (1) to rotate via the side shaft (401), so that the heated upper mold (2) and the heated lower mold (3) will rotate slowly, and at the same time, the center of gravity of the counterweight plate (406) can be changed, so that the mold base (1) can also rock back and forth while the mold base (1) rotates slowly with the side shaft (401) as the axis; Step 4: The side shaft (401) also drives the rotating disk (501) to rotate. When the roller (503) passes through the groove (502), the heated upper mold (2) and the heated lower mold (3) are automatically shaken, and the compression spring (505) is used to increase the shaking amplitude of the side frame (402); Step 5: After the heated upper mold (2) and the heated lower mold (3) heat the material to make it gel, the motor (403) stops working, and after the foaming is completed, the heated upper mold (2) and the heated lower mold (3) are separated by the mold opening component (6) for unloading.

2. A device for improving the compressibility of polyurethane foam, applied to the process for improving the compressibility of polyurethane foam according to claim 1, characterized in that: The invention comprises a mold base (1) and a shaking assembly (4), wherein the top of one end of the mold base (1) is rotatably connected to a heated upper mold (2), and a heated lower mold (3) is provided below the heated upper mold (2), the shaking assembly (4) is provided on the side of the mold base (1), and the shaking assembly (4) comprises a side shaft (401), the side shafts (401) are symmetrically fixed on both sides of the mold base (1), and the middle outer side of the side shaft (401) is rotatably connected to a side frame (402), a motor (403) is arranged on one side of the side frame (402), and the output of the motor (403) is The shaft is fixedly connected to the side shaft (401), a bevel gear set (404) is provided on the outer side of the middle portion of the side shaft (401), a rotating shaft (405) is arranged on the top of the bevel gear set (404), and a counterweight plate (406) is fixed on the top of the rotating shaft (405), the bottom of the side frame (402) is connected to a telescopic column (407), and a bottom frame (408) is fixed to the bottom of the telescopic column (407), the two sides of the bottom frame (408) are rotatably connected to a base (409), and a buffer pad (410) is arranged on one side of the base (409).

3. The device for improving the compressibility of polyurethane foam according to claim 2, characterized in that: A shaking assembly (5) is provided on the outside of one end of the side shaft (401), and the shaking assembly (5) includes a rotating disk (501). A rotating disk (501) is fixed on the outside of one end of the side shaft (401), and a groove (502) is provided on the outside of the rotating disk (501). A roller (503) is provided at the bottom of the rotating disk (501), and the end of the roller (503) is rotatably connected to a fixed seat (504). A compression spring (505) is provided on the outside of the telescopic column (407).

4. The device for improving the compressibility of polyurethane foam according to claim 3, characterized in that: The fixing seat (504) is fixedly connected to the bottom frame (408), and the bottom frame (408) is in contact with the compression spring (505).

5. The device for improving the compressibility of polyurethane foam according to claim 4, characterized in that: A mold opening assembly (6) is provided at the bottom of the mold base (1), and the mold opening assembly (6) includes an electric cylinder (601). The electric cylinder (601) is fixed to the bottom of the mold base (1), and one end of the electric cylinder (601) is connected to a driving block (602). Guide grooves (603) are provided on both sides of the driving block (602), and the guide grooves (603) are composed of an oblique groove and a straight groove.

6. The device for improving the compressibility of polyurethane foam according to claim 5, characterized in that: The guide groove (603) is internally slidably connected to a driving frame (604), and the upper portion of the driving frame (604) is slidably connected to a connecting plate (605), and the connecting plate (605) is fixedly connected to the heating upper mold (2).

7. The device for improving the compressibility of polyurethane foam according to claim 6, characterized in that: The driving frame (604) is a rectangular structure, and the driving frame (604) is slidably connected to the mold base (1).

8. The device for improving the compressibility of polyurethane foam according to claim 7, characterized in that: A synchronization plate (606) is fixed on the top of the driving block (602), and a support block (607) is arranged on the outside of the synchronization plate (606). The top of the support block (607) is slidably connected to a limit block (608), and the limit block (608) is fixedly connected to the heating lower mold (3).

9. The device for improving the compressibility of polyurethane foam according to claim 8, characterized in that: Slide columns (609) are arranged at the four ends of the bottom of the heating lower mold (3), and the slide columns (609) are slidably connected to the mold base (1), and a return spring (610) is sleeved on the outer side of the lower part of the slide column (609).

10. The device for improving the compressibility of polyurethane foam according to claim 9, characterized in that: Limiting plates (7) are fixed on both sides of the driving block (602), and a support leg (8) is slidably connected to the top of one end of the limiting plate (7), a gear shaft (9) is fixed inside one end of the support leg (8), and the gear shaft (9) is rotatably connected to the mold base (1), and the tooth portion of the gear shaft (9) is engaged with a tooth plate (10), and the tooth plate (10) is fixedly connected to the limiting plate (7).

Images