A flatness adjusting device for a molding press

Abstract

This invention discloses a flatness adjustment device for a molding press and the molding press thereof, belonging to the field of molding presses. The device includes a connecting plate, on which a hot press plate is mounted via connectors. Forcing members are located at the four corners of the top surface of the hot press plate. Four driving members are located on the side of the connecting plate facing the hot press plate, each driving member acting on one of the forcing members. When the transmission assembly rotates the turning part, the rotation of the turning part, through the driving part, forces the corresponding forcing members to move the corresponding corner of the hot press plate by a displacement at the micrometer level, thereby achieving precise adjustment of the corners of the hot press plate. Compared to the existing technology that directly adjusts by striking a conical rod with a hammer, this method is more convenient and ensures a higher degree of precision, allowing operators to adjust the flatness of the hot press plate more quickly.

Description

Technical Field

[0001] This invention relates to the field of molding machine technology, and in particular to a molding machine flatness adjustment device. Background Technology

[0002] In compression molding, the parallelism of the upper and lower hot press plates is crucial for ensuring uniform product thickness, consistent density, and surface quality. If the platen surfaces are uneven or tilted, it will lead to uneven mold closing pressure. This can cause minor issues such as localized under- or over-pressure on the product, resulting in defects like flash and shrinkage marks. In severe cases, it can cause uneven load wear or even damage to the mold.

[0003] Currently, for the flatness detection and correction of the hot press plate on a small molding machine, the operator first needs to stop the machine and remove the mold. Then, a movable platform-type calibration seat is placed on the base plate of the molding machine. A dial indicator is installed on this calibration seat, with its probe pointing vertically and contacting the working bottom surface of the upper hot press plate. By manually pushing the calibration seat horizontally, the dial indicator probe moves across different positions on the bottom surface of the upper hot press plate. The operator needs to continuously observe the changes in the dial indicator reading to determine the flatness of the bottom surface of the upper hot press plate or its parallelism deviation relative to the lower press plate. After detecting the deviation, the correction work is equally tedious. Usually, the operator needs to manually adjust the four locking nuts or threaded sleeves connected to the upper hot press plate based on experience, and repeat the above measurement and adjustment steps until the reading meets the requirements. However, this adjustment method requires repeatedly turning four locking nuts or threaded sleeves. The locking nuts and threaded sleeves are inconvenient to turn. Generally, the operator needs to hold a cone rod and use a hammer to strike the cone rod to turn the locking nuts or threaded sleeves. Not only is the operation inconvenient, but the adjustment accuracy depends on the force of striking the cone rod, making it difficult to achieve a precise adjustment. Summary of the Invention

[0004] The purpose of this invention is to provide a flatness adjustment device and recycling process for a molding press, so as to solve the technical problems of inconvenient operation and difficulty in controlling the adjustment accuracy when adjusting the flatness of the hot platen on a small molding press in the prior art.

[0005] The technical problem to be solved by this invention can be achieved through the following technical solution: A flatness adjustment device for a molding machine includes a connecting plate, on which a hot press plate is mounted via connectors. Forced members are located at the four corners of the top surface of the hot press plate. Four driving members are located on the side of the connecting plate facing the hot press plate, each driving member acting on one of the four forced members. Each driving member has a twisting part. A transmission assembly for driving the twisting part to rotate is mounted on the connecting plate. When the twisting part rotates, the driving member drives the forced members to produce a micrometer-level displacement at the corresponding corner of the hot press plate.

[0006] Furthermore, the driving member includes a first wedge plate slidably mounted on the connecting plate, the first wedge plate moving along the angle bisector direction at the corner of the hot press plate plane, the forcing member including a second wedge plate constructed at the corner of the hot press plate, the inclined surface of the first wedge plate abutting against the inclined surface of the second wedge plate, and the transmission assembly for driving the first wedge plate to move.

[0007] Furthermore, the transmission assembly includes a threaded rod that is horizontally and rotatably mounted on the connecting plate, the first wedge plate being threadedly fitted onto the threaded rod, and four torsion members being mounted on the connecting plate, each of the four torsion members driving the four threaded rods to rotate.

[0008] Furthermore, four guide rods are installed on the connecting plate, and the four guide rods are parallel to the four threaded rods respectively. Abutment springs are slidably sleeved on the guide rods, with one end of the abutment spring abutting against the connecting plate and the other end of the abutment spring abutting against the second wedge plate.

[0009] Furthermore, the torsion member includes a twisting rod that is vertically and rotatably mounted on the connecting plate, a worm gear is mounted on the twisting rod, and a worm wheel that meshes with the worm gear is mounted on the threaded rod.

[0010] Furthermore, a pivot rod is installed on the side of the connecting plate away from the hot press plate. A connecting rod is horizontally constructed at one end of the pivot rod. A mounting cylinder is vertically and rotatably mounted on the connecting rod. A driving rod is vertically and slidably inserted into the mounting cylinder. A polygonal rod is constructed at the bottom end of the driving rod. A polygonal hole for inserting the polygonal rod is opened at the top end of the rotating rod. An extension rod is constructed at the top end of the driving rod.

[0011] Furthermore, the connector includes four mounting seats mounted on the hot press plate, each mounting seat having a locking screw installed on it. The connecting plate has four through holes, and the locking screw is slidably inserted into the through holes. A disc spring assembly is installed between the mounting seat and the connecting plate. A locking cylinder threaded onto the locking screw is rotatably mounted on the connecting plate, and the locking cylinder has multiple insertion holes on its outer periphery.

[0012] Furthermore, the connector is in the shape of a rigid column, and there are four of them arranged in a circular array between the connecting plate and the hot press plate.

[0013] A molding press using the above-mentioned molding press flatness adjustment device includes a machine body with four vertical guide columns on the machine body. A connecting plate is slidably fitted on the four guide columns. A hydraulic cylinder is installed on the machine body, located below the connecting plate, and the top of the hydraulic cylinder is connected to the connecting plate.

[0014] Furthermore, two sliding members are symmetrically installed on the machine body. Each sliding member includes multiple sliders installed on the machine body and guide rails slidably inserted on the multiple sliders. A connecting strip is installed on the guide rail. The top of the connecting strip is connected to the connecting plate. A connecting block is connected between the bottom ends of the two connecting strips. The connecting block is connected to the telescopic end of the hydraulic cylinder.

[0015] The beneficial effects of this invention are: The transmission component of this invention rotates the screwing part. When the screwing part rotates, the rotation of the screwing part forces the corresponding forcing member to drive the corresponding corner of the hot press plate to move at the micrometer level, thereby achieving fine adjustment of the corner of the hot press plate. Compared with the existing technology of directly adjusting by hitting the conical rod with a hammer, the adjustment is more convenient and ensures the precision of the adjustment, allowing the staff to adjust the flatness of the hot press plate more quickly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Partial three-dimensional sectional view; Figure 3 This is an exploded view of part of the structure of the present invention; Figure 4 This is a diagram showing the connection plate of the present invention installed in a molding machine; Figure 5 This is a state illustration of another embodiment of the connector of the present invention; Figure 6 For the present invention Figure 4 Partial three-dimensional sectional view; Figure 7 For the present invention Figure 4 Another partial sectional view; Figure 8 For the present invention Figure 4 Another partial three-dimensional sectional view; Figure 9 For the present invention Figure 6 Enlarged view of the structure at point A in the middle; Figure 10 For the present invention Figure 7 Enlarged view of the structure at point B in the middle; Figure 11 For the present invention Figure 5 Partial three-dimensional sectional view.

[0017] Explanation of reference numerals in the attached figures: 1. Connecting plate; 2. Connecting component; 3. Hot press plate; 4. Forcing component; 401. Second wedge plate; 5. Driving component; 501. First wedge plate; 6. Transmission assembly; 601. Threaded rod; 602. Torsion component; 6021. Tightening rod; 6022. Worm gear; 6023. Worm wheel; 7. Guide rod; 8. Abutment spring; 9. Pivot rod; 10. Connecting rod; 11. Mounting cylinder; 12. Driving rod; 13. Polygonal rod; 14. Polygonal hole; 15. Extension rod; 16. Mounting seat; 17. Locking screw; 18. Through hole; 19. Disc spring assembly; 20. Locking screw cylinder; 21. Insertion hole; 22. Sliding component; 23. Body; 24. Guide column; 25. Hydraulic cylinder; 26. Slider; 27. Guide rail; 28. Connecting strip plate; 29. ​​Connecting block. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0019] like Figures 1 to 11 As shown, an embodiment of the present invention provides a flatness adjustment device for a molding machine, including a connecting plate 1. A hot press plate 3 is mounted on the connecting plate 1 via a connecting member 2. Forcing members 4 are provided at the four corners of the top surface of the hot press plate 3. Four driving members 5 are provided on the side of the connecting plate 1 facing the hot press plate 3, and are respectively located at the four corners of the connecting plate 1. The four driving members 5 act on the four forcing members 4 respectively. Each driving member 5 has a twisting part. A transmission assembly 6 is mounted on the connecting plate 1 to drive the twisting part to rotate. When the twisting part rotates, the driving member 5 drives the forcing members 4 to produce a micron-level displacement at the corresponding corner of the hot press plate 3. After the connecting plate 1 is connected to an existing molding machine, when flatness adjustment is required, a calibration seat is first placed on the base plate of the molding machine. The magnetic base of the dial indicator is attached to the calibration seat. The position of the dial indicator is adjusted so that the probe contacts the bottom surface of the hot press plate 3. Then, the calibration seat is moved on the base plate of the molding machine, and the value of the dial indicator is observed. When any error is found to exceed the normal value, the flatness of the hot press plate 3 needs to be adjusted. The rotating part is rotated by the transmission component 6. When the rotating part rotates, it will force the corresponding forcing part 4 to move the corresponding corner of the hot press plate 3 by a micrometer-level displacement, thereby achieving fine adjustment of the corner of the hot press plate 3. Compared with the existing technology of directly adjusting by hammering the conical rod, the adjustment is more convenient and ensures the precision of the adjustment, allowing the staff to adjust the flatness of the hot press plate 3 more quickly.

[0020] like Figure 1 and Figure 2As shown, in some embodiments, the driving member 5 includes a first wedge plate 501 slidably mounted on the connecting plate 1. The first wedge plate 501 moves along the angle bisector direction at the corner of the hot press plate 3, forcing member 4 to include a second wedge plate 401 constructed at the corner of the hot press plate 3. The inclined surface of the first wedge plate 501 abuts against the inclined surface of the second wedge plate 401. The transmission assembly 6 is used to drive the first wedge plate 501 to move. That is, when it is necessary to adjust the flatness, the first wedge plate 501 can be driven to move by the transmission assembly 6. When the first wedge plate 501 moves, the inclined surface of the first wedge plate 501 will contact the corresponding inclined surface of the second wedge plate 401 because the second wedge plate 401... 01 contacts the inclined surface, thus forcing a certain tilt at the corner of the hot press plate 3. It should be noted that when the connecting plate 1 is connected by the connecting piece 2 during normal hot pressing, the hot press plate 3 will not tilt due to the connection of the connecting piece 2. The connecting piece 2 has a certain rigidity. When the first wedge plate 501 moves and the second wedge plate 401 moves through the transmission component 6, it can overcome the connection of the connecting piece 2 and produce micron-level adjustment. Preferably, the inclined angle between the first wedge plate 501 and the second wedge plate 401 is forty degrees, which can ensure the accuracy of adjustment and also has good rigidity after the first wedge plate 501 and the second wedge plate 401 come into contact.

[0021] like Figure 1 and Figure 2 As shown, in some embodiments, the transmission assembly 6 includes a threaded rod 601 that is horizontally and rotatably mounted on the connecting plate 1. A first wedge plate 501 is threadedly fitted onto the threaded rod 601. Four torsion members 602 are mounted on the connecting plate 1. The four torsion members 602 drive the four threaded rods 601 to rotate respectively. That is, when it is necessary to move one of the first wedge plates 501, it is only necessary to drive the threaded rod 601 in the corresponding direction to rotate through the torsion member 602. When the threaded rod 601 rotates, it will drive the corresponding first wedge plate 501 to move. In this way, when the first wedge plate 501 abuts against the corresponding second wedge plate 401, it can effectively prevent the first wedge plate 501 from moving accidentally when the hot press plate 3 is in normal use.

[0022] like Figure 1 , Figure 2 and Figure 10As shown, in some embodiments, four guide rods 7 are installed on the connecting plate 1. The four guide rods 7 are parallel to the four threaded rods 601 respectively. Abutment springs 8 are slidably sleeved on the guide rods 7. One end of the abutment spring 8 abuts against the connecting plate 1, and the other end of the abutment spring 8 abuts against the second wedge plate 401. The design of the guide rods 7 plays a guiding and limiting role, making the first wedge plate 501 move more smoothly. The abutment spring 8 has a certain preload in normal state, so that when the threaded rod 601 rotates, it can drive the first wedge plate 501 to move. The abutment spring 8 can prevent the thread gap between the threaded rod 601 and the first wedge plate 501 from causing deviation when adjusting the threaded rod 601. The abutment spring 8 keeps the threads of the threaded rod 601 in contact with the internal threads of the first wedge plate 501, avoiding loosening that affects deviation. It effectively avoids the vibration generated by the hot press plate 3 during the hot pressing process, which causes shaking deviation in the thread gap between the first wedge plate 501 and the threaded rod 601.

[0023] like Figure 1 and Figure 2 As shown, in some embodiments, the torsion member 602 includes a torsion rod 6021 that is vertically and rotatably mounted on the connecting plate 1. A worm gear 6022 is mounted on the torsion rod 6021, and a worm wheel 6023 that meshes with the worm gear 6022 is mounted on the threaded rod 601. The design of the worm wheel 6023 and the worm gear 6022 is such that when the worm gear 6022 rotates significantly, the worm wheel 6023 will only move slightly. The rotation of the worm wheel 6023 drives the threaded rod 601 to rotate. In this way, when the worm gear 6022 rotates, the threaded rod 601 can rotate more precisely, improving the adjustment accuracy. Moreover, the worm wheel 6023 and the worm gear 6022 have a self-locking property. This self-locking property of the worm wheel 6023 and the worm gear 6022 with the threaded rod 601 can further prevent the first wedge plate 501 from moving during use due to the hot press plate 3.

[0024] like Figures 1 to 3As shown, in some embodiments, a pivot rod 9 is installed on the side of the connecting plate 1 away from the hot press plate 3. That is, the pivot rod 9 can rotate on the top of the connecting plate 1. A connecting rod 10 is horizontally constructed at one end of the pivot rod 9. A mounting cylinder 11 is vertically and rotatably mounted on the connecting rod 10. A drive rod 12 is vertically and slidably inserted into the mounting cylinder 11. A polygonal rod 13 is constructed at the bottom end of the drive rod 12. A polygonal hole 14 for inserting the polygonal rod 13 is opened at the top end of the tightening rod 6021. An extension rod 15 is constructed at the top end of the drive rod 12. Specifically, the polygonal hole 14 on the tightening rod 6021 is a regular hexagonal hole, which is consistent with the shape of the regular hexagonal hole on the existing bolt. The extension rod 15 is designed to adjust the corresponding tightening rod 6021 when needed. Simply hold the extension rod 15 and rotate it around the pivot rod 9. The rotation of the pivot rod 9 indirectly drives the drive rod 12 to rotate. When the polygonal rod 13 on the drive rod 12 is aligned with the polygonal hole 14 that needs to be adjusted, the extension rod 15 moves downward so that the polygonal rod 13 is inserted into the corresponding polygonal hole 14. The polygonal rod 13 is inserted into the polygonal hole 14 to limit the rotational freedom of the pivot rod 9. At this time, rotating the extension rod 15 will cause the drive rod 12 to rotate around the axis of the mounting cylinder 11. At this time, the mounting cylinder 11 will also be forced to rotate, thereby causing the polygonal rod 13 to rotate and realize the rotation of the screw rod 6021. The design of the extension rod 15 adopts the lever principle, making it more convenient to rotate the screw rod 6021.

[0025] like Figure 4 , Figure 6 and Figure 9 As shown, in one embodiment, the connector 2 includes four mounting seats 16 mounted on the hot press plate 3. Locking screws 17 are mounted on the mounting seats 16. The connecting plate 1 has four through holes 18. The locking screws 17 are slidably inserted into the through holes 18. A disc spring assembly 19 is installed between the mounting seats 16 and the connecting plate 1. A locking screw cylinder 20, threaded onto the locking screws 17, is rotatably mounted on the connecting plate 1. Multiple insertion holes 21 are provided on the outer periphery of the locking screw cylinder 20. The disc spring assembly 19 is in a fully compressed state, becoming rigid to pull the hot press plate 3 to the bottom of the connecting plate 1, effectively making the hot press plate 3 and the connecting plate 1 a single unit. When the disc spring assembly 19 is in a fully compressed state, the hot press plate 3 is not prone to displacement during normal hot pressing, ensuring accuracy. When it is necessary to adjust the flatness of the hot press plate 3, the locking screw 20 needs to be loosened, so that the disc spring assembly 19 changes from rigid to having a certain elasticity. At this time, when the screw rod 6021 rotates and drives the first wedge plate 501 to move, the gap between the threads of the locking screw 20 and the locking screw 17 is the reserved space for adjusting the flatness of the hot press plate 3. After the flatness adjustment of the hot press plate 3 is completed, the locking screw 20 is tightened so that the disc spring assembly 19 is pressed back into a rigid whole. This design of the connector 2 can effectively improve the service life of the connector 2.

[0026] like Figure 5 and Figure 11 As shown, in another embodiment, the connector 2 is in the shape of a rigid column, and there are four of them arranged in a circular array between the connecting plate 1 and the hot press plate 3. Preferably, one end of the connector 2 is a sphere, which is connected to the top of the hot press plate 3 by a ball joint. The other end of the connector 2 is screwed into the connecting plate 1. Specifically, the sphere and the spherical recess of the hot press plate 3 are fitted with a micro-gap, and high-temperature grease is applied to the spherical recess to ensure flexibility for long-term use. The material of the connector 2 is 42CrMo. When the first wedge plate 501 moves, the connector 2 will have a slight displacement. After the 42CrMo material of the connector 2 undergoes a certain elastic deformation, it can ensure that the hot press plate 3 is not prone to breakage or deformation during daily use. In this embodiment, the connector 2 is more convenient to adjust.

[0027] like Figures 4 to 8 As shown, in some embodiments, the above-mentioned molding machine flatness adjustment device includes a machine body 23, on which four vertical guide posts 24 are constructed. The connecting plate 1 is slidably fitted on the four guide posts 24. A hydraulic cylinder 25 is installed on the machine body 23. The hydraulic cylinder 25 is located below the connecting plate 1, and the top of the hydraulic cylinder 25 is connected to the connecting plate 1. Unlike the prior art, the hydraulic cylinder 25 is located below the connecting plate 1 and the hot press plate 3, so that the turning rod 6021 will not be affected by the hydraulic cylinder 25.

[0028] like Figures 4 to 8 As shown, in some embodiments, two sliding members 22 are symmetrically installed on the body 23. The sliding member 22 includes multiple sliders 26 installed on the body 23, and also includes a guide rail 27 slidably inserted on the multiple sliders 26. A connecting strip 28 is installed on the guide rail 27. The top of the connecting strip 28 is connected to the connecting plate 1. A connecting block 29 is connected between the bottom ends of the two connecting strips 28. The connecting block 29 is connected to the telescopic end of the hydraulic cylinder 25. The design of the guide rail 27 and the slider 26 plays a guiding and limiting role, making the connecting plate 1 move more smoothly.

[0029] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A flatness adjustment device for a molding machine, characterized in that, The device includes a connecting plate (1), on which a hot press plate (3) is mounted via a connector (2). A forcing member (4) is provided at the four corners of the top surface of the hot press plate (3). Four driving members (5) are provided on the side of the connecting plate (1) facing the hot press plate (3). The four driving members (5) are located at the four corners of the connecting plate (1) respectively. The four driving members (5) act on the four forcing members (4) respectively. The driving member (5) has a twisting part. A transmission assembly (6) for driving the twisting part to rotate is installed on the connecting plate (1). When the twisting part rotates, the driving member (5) drives the forcing member (4) to cause a micron-level displacement at the corresponding corner of the hot press plate (3).

2. The flatness adjustment device for a molding machine as described in claim 1, characterized in that, The driving component (5) includes a first wedge plate (501) slidably mounted on the connecting plate (1), the first wedge plate (501) moves along the angle bisector direction at the corner of the hot press plate (3), the forcing component (4) includes a second wedge plate (401) constructed at the corner of the hot press plate (3), the inclined surface of the first wedge plate (501) abuts against the inclined surface of the second wedge plate (401), and the transmission component (6) is used to drive the first wedge plate (501) to move.

3. The flatness adjustment device for a molding machine as described in claim 2, characterized in that, The transmission assembly (6) includes a threaded rod (601) that is horizontally and rotatably mounted on the connecting plate (1). The first wedge plate (501) is threaded onto the threaded rod (601). Four torsion members (602) are mounted on the connecting plate (1), and the four torsion members (602) drive the four threaded rods (601) to rotate respectively.

4. The flatness adjustment device for a molding machine as described in claim 3, characterized in that, Four guide rods (7) are installed on the connecting plate (1). The four guide rods (7) are parallel to the four threaded rods (601) respectively. A contact spring (8) is slidably sleeved on the guide rod (7). One end of the contact spring (8) abuts against the connecting plate (1), and the other end of the contact spring (8) abuts against the second wedge plate (401).

5. The flatness adjustment device for a molding machine as described in claim 4, characterized in that, The torsion member (602) includes a torsion rod (6021) that is vertically and rotatably mounted on the connecting plate (1), a worm gear (6022) is mounted on the torsion rod (6021), and a worm wheel (6023) that meshes with the worm gear (6022) is mounted on the threaded rod (601).

6. The flatness adjustment device for a molding machine as described in claim 5, characterized in that, A pivot rod (9) is installed on the side of the connecting plate (1) away from the hot press plate (3). A connecting rod (10) is horizontally constructed at one end of the pivot rod (9). An installation cylinder (11) is vertically mounted and rotatable on the connecting rod (10). A driving rod (12) is vertically slidably inserted into the installation cylinder (11). A polygonal rod (13) is constructed at the bottom end of the driving rod (12). A polygonal hole (14) for inserting the polygonal rod (13) is opened at the top end of the rotating rod (6021). An extension rod (15) is constructed at the top end of the driving rod (12).

7. The flatness adjustment device for a molding machine as described in claim 1, characterized in that, The connector (2) includes four mounting seats (16) mounted on the hot press plate (3). A locking screw (17) is mounted on the mounting seat (16). Four through holes (18) are provided on the connecting plate (1). The locking screw (17) is slidably inserted into the through holes (18). A disc spring assembly (19) is installed between the mounting seat (16) and the connecting plate (1). A locking screw cylinder (20) threaded onto the locking screw (17) is rotatably mounted on the connecting plate (1). Multiple insertion holes (21) are provided on the outer periphery of the locking screw cylinder (20).

8. The flatness adjustment device for a molding machine as described in claim 1, characterized in that, The connector (2) is in the shape of a rigid column, and there are four of them arranged in a circular array between the connecting plate (1) and the hot press plate (3).

9. A molding machine, characterized in that, The flatness adjustment device for the molding machine as described in claim 1 includes a machine body (23), on which four vertical guide columns (24) are constructed, and the connecting plate (1) is slidably fitted on the four guide columns (24). A hydraulic cylinder (25) is installed on the machine body (23), and the hydraulic cylinder (25) is located below the connecting plate (1). The top end of the hydraulic cylinder (25) is connected to the connecting plate (1).

10. A molding machine as described in claim 9, characterized in that, Two sliding parts (22) are symmetrically installed on the body (23). The sliding parts (22) include multiple sliders (26) installed on the body (23) and guide rails (27) slidably inserted on the multiple sliders (26). A connecting strip (28) is installed on the guide rail (27). The top of the connecting strip (28) is connected to the connecting plate (1). A connecting block (29) is connected between the bottom ends of the two connecting strips (28). The connecting block (29) is connected to the telescopic end of the hydraulic cylinder (25).

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