Foam tape slitting device

Abstract

The application relates to a foam rubber slitting device and relates to the technical field of foam rubber production, which comprises a rack, the output shaft of a driving motor is fixed with a middle shaft, the middle shaft is fixed with a center gear, a planetary gear is in meshing connection with the inside of an inner toothed disc, the planetary gear is in meshing connection with the center gear at the same time, an outer shaft is rotatably sleeved outside the middle shaft, the outer shaft is fixed with a planet carrier, and the planet carrier is in rotary connection with the planetary gear; the middle shaft is fixed with an outer turntable, the outer shaft is fixed with an inner turntable, a plurality of ring cutters are fixed on the outer wall of the outer turntable, the inner turntable is in sliding connection with a cutter seat, a cutting cutter is fixed on the cutter seat, and the rack is provided with a driving structure for driving the cutter seat to move. The slitting device can complete the slitting and cutting operation of the foam rubber through a single driving source, the length size and width size of the produced foam rubber tape are completely consistent, the slitting device does not need a controller, has no control difficulty, and the cost is further reduced.

Description

Technical Field

[0001] This application relates to the field of foam adhesive production technology, and in particular to a foam adhesive slitting device. Background Technology

[0002] Foam adhesive refers to a double-sided adhesive made by coating both sides of a foam substrate with a strong acrylic adhesive, and then covering one side with release paper or release film. If both sides are covered with release paper or release film, it is called sandwich double-sided adhesive paper. Foam adhesive has the characteristics of strong adhesion, good water resistance, and cushioning function. Foam is classified into EVA foam, PE foam, PU foam, etc., according to the substrate. In the production process of foam adhesive, the foam raw material needs to be cut into strips, then wound and cut to a certain length to form the product.

[0003] A utility model patent with publication number CN217648433U discloses a foam tape coating and slitting integrated machine, including a motor, belt, first rotating column, second rotating column, third rotating column, hydraulic cylinder, extrusion block, spring, cutting block, blade, support frame, and foam adhesive. The foam adhesive is fixed to the second rotating column. The motor drives the first rotating column, which in turn drives the second rotating column, and the belt drives the third rotating column. After the foam adhesive is installed, the hydraulic cylinder drives the extrusion block downwards, which in turn drives the spring, which in turn drives the cutting block. The cutting block cuts the foam adhesive. The hydraulic cylinder continues to move downwards to extrude the spring. When the hydraulic cylinder extrudes the spring, the blade continues to move downwards. Then, the motor drives the first rotating column, and the hydraulic cylinder continues to drive the blade to cut the foam adhesive on the outer wall of the second rotating column.

[0004] Regarding the aforementioned technologies, the inventors believe that existing devices require a motor as a drive source when cutting foam adhesive into strips, and a hydraulic cylinder or pneumatic cylinder as a drive source when cutting the length of the foam adhesive. Having multiple drive sources not only increases the cost but also increases the difficulty of control, often requiring a controller to operate automatically, which further increases the cost. Summary of the Invention

[0005] This application provides a foam adhesive slitting device that can complete the functions of cutting foam adhesive into strips and cutting to a fixed length with a single drive source. It can also operate automatically without a controller, thus reducing costs.

[0006] This application provides a foam adhesive slitting device, which adopts the following technical solution: A foam adhesive slitting device includes a frame, a drive motor and an internal gear disk fixed on the frame, a central shaft fixed on the output shaft of the drive motor, a central gear fixed on the central shaft, a planetary gear meshing with the internal gear disk, the planetary gear meshing with the central gear, an outer shaft rotatably sleeved on the central shaft, a planetary carrier fixed on the outer shaft, and the planetary carrier rotatably connected to the planetary gear. The central shaft is fixed with an outer turntable, and the outer shaft is fixed with an inner turntable. The outer ring wall of the inner turntable is located close to the inner ring wall of the outer turntable. The outer wall of the outer turntable is fixed with a plurality of ring cutting blades. The inner turntable is slidably connected with a blade holder, and a cutting blade is fixed on the blade holder. The outer turntable has an opening for the cutting blade to pass through. The frame is provided with a drive structure for driving the blade holder to move.

[0007] By adopting the above technical solution, the foam adhesive to be slit is fed into the bottom of the outer turntable. After the drive motor is started, the motor drives the central shaft to rotate, which in turn drives the outer and inner turntables to rotate through the transmission mechanism. The ring cutter cuts the foam adhesive material into strips as the outer turntable rotates. Through the reduction action of the central gear and planetary gears, the rotation speed of the inner turntable is lower than that of the outer turntable. Therefore, the inner turntable rotates only once after the outer turntable rotates several times. At this time, the foam adhesive has been cut into relatively long strips that can be further cut. When the cutter holder rotates to the lowest position with the inner turntable, the drive structure drives the cutter holder to move downwards, and the cutting blade moves downwards to cut the foam adhesive. With this slitting device, the cutting and strip-cutting operations of the foam adhesive can be completed with a single drive source. This slitting device does not require a controller, eliminates control difficulties, and further reduces costs.

[0008] Optionally, the drive structure includes a support rod fixed to the frame, a protrusion fixed on the support rod, an arc block for contacting the protrusion fixed on the tool holder, and a spring fixedly connected between the arc block and the inner turntable.

[0009] By adopting the above technical solution, when the inner turntable rotates to the position near the bottom of the blade holder, the arc block and the protrusion begin to slide into contact. The protrusion drives the arc block to move radially outward of the inner turntable, and the blade holder and the cutting blade move towards the support plate, so that the cutting blade extends out of the through-hole to cut the foam adhesive on the top of the support plate. The spring provides a restoring force for the blade holder to reset.

[0010] Optionally, the outer ring wall of the inner turntable is rotatably connected to a plurality of rollers, and the rollers are in rolling contact with the inner ring wall of the outer turntable.

[0011] By adopting the above technical solution, a rolling support structure is formed between the inner and outer turntables through rollers, which ensures good coaxiality when the inner and outer turntables rotate, thereby improving the stability of rotation.

[0012] Optionally, three planetary gears are evenly arranged along the circumference of the internal gear disk.

[0013] By adopting the above technical solution and setting three planetary gears, the force is made stable.

[0014] Optionally, a cover plate is provided on the end face of the internal gear disk, and a bearing seat for rotatable connection of the central shaft is provided at the center of the cover plate.

[0015] By adopting the above technical solution, one side of the internal gear disk is covered by the cover plate, and the end of the bearing seat that is the central shaft plays the role of rotational support.

[0016] Optionally, the central shaft and the central gear are connected by a keyway structure to form a sliding connection, and the planet carrier and the planet gear are slidably sleeved together.

[0017] By adopting the above technical solution, the keyway structure enables reliable transmission between the central shaft and the central gear, while also facilitating the removal of the sliding central gear from the end of the central shaft and the removal of the sliding planetary gear from the end of the planetary carrier.

[0018] Optionally, the cover plate abuts against the end faces of the central gear and planetary gears.

[0019] By adopting the above technical solution, the cover plate prevents the central gear and planetary gear from leaving the interior of the internal gear disk.

[0020] Optionally, the frame is rotatably connected to a support plate, which is located below the outer turntable, and the support plate has an annular groove for the annular cutter to enter.

[0021] By adopting the above technical solution, the support plate is used to cooperate with the outer turntable to clamp the foam adhesive and transport it backward. The support plate drives the foam adhesive to move through friction. The annular groove allows the ring cutting blade to enter, thereby ensuring that the ring cutting blade cuts the raw material.

[0022] Optionally, the central shaft is fixed with a gear one, the support plate is fixed with a gear two, and the frame is rotatably connected with a gear three and a gear four. The gear three meshes with the gear one, and the gear four meshes with both the gear three and the gear two.

[0023] By adopting the above technical solution, through the sequential transmission action of gear one, gear two, gear three, and gear four, the rotation of the central shaft drives the support disk to rotate together, and the rotation direction of the outer turntable is opposite to that of the support disk.

[0024] Optionally, the diameter of gear one is smaller than that of gear two, so that the rotational speed of the outer turntable is greater than that of the support disc.

[0025] By adopting the above technical solution, the linear speed at which the ring cutter cuts the foam adhesive is greater than the linear speed at which the support plate conveys the foam adhesive, and the ring cutter can cut the foam adhesive more easily.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This slitting device can complete the cutting and trimming of foam adhesive strips using a single drive source, ensuring that the produced foam tapes have completely consistent length and width dimensions. This slitting device requires no controller, eliminating control complexity and further reducing costs; 2. The linear speed at which the ring cutter cuts the foam adhesive is greater than the linear speed at which the support plate conveys the foam adhesive, making it easier for the ring cutter to cut the foam adhesive. 3. It is easy to replace the center gear and planetary gear with different diameter combinations, thereby adjusting the speed ratio of the inner and outer turntables, and thus adjusting the length of the cut foam adhesive. Attached Figure Description

[0027] Figure 1 This is a three-dimensional foam adhesive slitting device according to an embodiment. Figure 1 ; Figure 2 This is a three-dimensional foam adhesive slitting device according to an embodiment. Figure 2 ; Figure 3 yes Figure 1 Enlarged view of point A; Figure 4 This is a partial view of the inner turntable and cutting blade in an embodiment.

[0028] Explanation of reference numerals in the attached diagram: 1. Frame; 11. Drive motor; 12. Internal gear disc; 13. Central shaft; 21. Central gear; 22. Planetary gear; 23. Outer shaft; 24. Planetary carrier; 3. Outer turntable; 4. Inner turntable; 14. Cover plate; 15. Shaft seat; 31. Ring cutter; 5. Support disc; 51. Ring groove; 61. Gear one; 62. Gear two; 63. Gear three; 64. Gear four; 41. Blade holder; 42. Cutting blade; 43. Guide rod; 32. Through-hole; 16. Support rod; 17. Protrusion; 44. Arc block; 45. Spring; 46. Roller. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1 and Figure 2This embodiment discloses a foam adhesive slitting device, including a frame 1. The frame 1 is fixed with a drive motor 11 and an internal gear disk 12. The output shaft of the drive motor 11 is fixed with a central shaft 13. The central shaft 13 is fixed with a central gear 21. The inner ring of the internal gear disk 12 is a ring of internal gears. Planetary gears 22 are meshed and connected inside the internal gear disk 12. Three planetary gears 22 are evenly arranged along the circumference of the internal gear disk 12. The planetary gears 22 mesh with the central gear 21. An outer shaft 23 is rotatably sleeved on the central shaft 13. A planet carrier 24 is fixed on the outer shaft 23. The planet carrier 24 is rotatably connected to the planetary gears 22.

[0031] The central shaft 13 is fixed with an outer turntable 3, and the outer shaft 23 is fixed with an inner turntable 4. The central shaft 13 is driven to rotate by the drive motor 11, and the central shaft 13 drives the outer turntable 3 to rotate. At the same time, the central shaft 13 drives the outer shaft 23 to rotate through the transmission action of the central gear 21 and the planetary gear 22. This transmission mechanism is a reduction mechanism, so that the rotation speed of the inner turntable 4 is less than that of the outer turntable 3, and the rotation directions of the inner turntable 4 and the outer turntable 3 are the same.

[0032] A cover plate 14 is provided on the end face of the internal gear disk 12. The cover plate 14 is fixed to the outer edge of the internal gear disk 12 by its inner edge, and at the same time, it is easy to remove the cover plate 14. The cover plate 14 abuts against the end faces of the central gear 21 and the planetary gear 22. The cover plate 14 prevents the central gear 21 and the planetary gear 22 from leaving the interior of the internal gear disk 12. The side of the cover plate 14 facing the central gear 21 is coated with lubricating oil to reduce frictional wear with the central gear 21 and the planetary gear 22. A bearing seat 15 is provided at the center of the cover plate 14 for rotatably connecting to the central shaft 13. The bearing seat 15 provides rotatable support for one end of the central shaft 13.

[0033] A sliding connection is established between the central shaft 13 and the central gear 21 via a keyway structure, and a sliding sleeve is formed between the planetary carrier 24 and the planetary gear 22. The keyway structure ensures reliable power transmission between the central shaft 13 and the central gear 21, while also facilitating the removal of the central gear 21 from the end of the central shaft 13 and the planetary gear 22 from the end of the planetary carrier 24. This easy removal of the central gear 21 and planetary gear 22 allows for convenient replacement; by replacing the central gear 21 and planetary gear 22 with different diameter combinations, the transmission ratio can be changed, thereby adjusting the speed ratio between the inner turntable 4 and the outer turntable 3.

[0034] The outer ring wall of the inner turntable 4 is positioned close to the inner ring wall of the outer turntable 3. Several ring-cutting blades 31 are fixed to the outer wall of the outer turntable 3. These blades cut the foam adhesive into strips; the more ring-cutting blades 31 there are, the more strips can be cut at once. A support plate 5 is rotatably connected to the frame 1, located below the outer turntable 3. The support plate 5 has annular grooves 51 for the ring-cutting blades 31 to enter. The outer ring wall of the support plate 5 is made of a material with high friction with the foam adhesive, facilitating movement of the foam adhesive through friction. The annular grooves 51 allow partial entry of the ring-cutting blades 31, ensuring that the ring-cutting blades 31 cut the raw material.

[0035] Reference Figure 1 A gear 61 is fixed to the central shaft 13, and a gear 62 is fixed to the support plate 5. Gears 63 and 64 are rotatably connected to the frame 1. Gear 63 meshes with gear 61, and gear 64 meshes with both gears 63 and 62. Through the sequential transmission of gears 61, 62, 63, and 64, the central shaft 13 rotates, causing the support plate 5 to rotate as well. The outer turntable 3 rotates in the opposite direction to the support plate 5. Since the diameter of gear 61 is smaller than that of gear 62, the rotational speed of the outer turntable 3 is greater than that of the support plate 5. Therefore, the linear speed at which the ring cutter 31 cuts the foam adhesive is greater than the linear speed at which the support plate 5 conveys the foam adhesive, allowing the ring cutter 31 to cut the foam adhesive more easily.

[0036] Reference Figure 3 and Figure 4 The inner turntable 4 is slidably connected to a blade holder 41, on which a cutting blade 42 is fixed. Two guide rods 43 are fixed to the blade holder 41 and slidably connected to the inner turntable 4, improving the stability of the blade holder 41's sliding motion. The number of cutting blades 42 is the same as the number of strips of foam adhesive, with multiple cutting blades 42 located between adjacent ring-cutting blades 31. The outer turntable 3 has openings 32 for the cutting blades 42 to pass through. It should be noted that the width of the openings 32 is much greater than the thickness of the cutting blades 42 to prevent the cutting blades 42 from colliding with the outer turntable 3 during the cutting process. Several openings 32 are provided along the circumference of the outer turntable 3 to accommodate different diameter combinations of central gears 21 and planetary gears 22. The frame 1 is equipped with a drive structure for moving the blade holder 41.

[0037] The drive structure includes a support rod 16 fixed to the frame 1, a protrusion 17 fixed on the support rod 16, the protrusion 17 being located inside the inner turntable 4 near the lower end, the bottom surface of the protrusion 17 being an arc-shaped surface, and an arc block 44 fixed on the cutter holder 41 for contacting the protrusion 17, the side of the arc block 44 facing the center of the inner turntable 4 being an arc-shaped surface, and a spring 45 fixedly connecting the arc block 44 and the inner turntable 4. When the inner turntable 4 rotates to the position where the cutter holder 41 is close to the support plate 5, the arc block 44 and the protrusion 17 begin to slide into contact, the protrusion 17 driving the arc block 44 to move radially outward of the inner turntable 4, then the cutter holder 41 and the cutting blade 42 move towards the support plate 5, causing the cutting blade 42 to extend out of the through-hole 32 to cut the foam adhesive on the top of the support plate 5, and the spring 45 providing a restoring force for the reset of the cutter holder 41.

[0038] A number of rollers 46 are rotatably connected to the outer ring wall of the inner turntable 4. The rollers 46 are evenly distributed along the circumference of the inner turntable 4 and roll in contact with the inner ring wall of the outer turntable 3. The rollers 46 form a rolling support structure between the inner turntable 4 and the outer turntable 3, which ensures good coaxiality when the inner turntable 4 and the outer turntable 3 rotate, and improves the stability of rotation.

[0039] The implementation principle of a foam adhesive slitting device according to an embodiment of this application is as follows: the foam adhesive to be slitting is fed between the outer turntable 3 and the support plate 5. After the drive motor 11 is started, the motor drives the central shaft 13 to rotate, and then drives the outer turntable 3, the inner turntable 4, and the support plate 5 to rotate through various transmission mechanisms.

[0040] The outer turntable 3 and the support plate 5 rotate in opposite directions, thereby clamping the foam adhesive and transporting it backward. The ring cutter 31 cuts the foam adhesive raw material into strips as the outer turntable 3 rotates. The cut foam adhesive strips are then wound on a subsequent winding device (not shown in the figure).

[0041] Through the reduction action of the central gear 21 and planetary gear 22, the rotational speed of the inner turntable 4 is lower than that of the outer turntable 3. Therefore, after the outer turntable 3 rotates several times, the inner turntable 4 rotates only once. At this time, the foam tape has been cut into longer strips and can be cut. When the blade holder 41 rotates with the inner turntable 4 to the lowest position, the protrusion 17 drives the arc block 44 to move downward, and the cutting blade 42 moves downward to cut the foam tape, completing the slitting operation of a roll of foam tape. As described above, continuous operation is achieved, thereby realizing continuous production.

[0042] This slitting device can complete the cutting and trimming of foam adhesive strips using a single drive source (i.e., drive motor 11), ensuring that the produced foam adhesive tapes have completely consistent length and width dimensions. This slitting device requires no controller, eliminating control difficulties and further reducing costs.

[0043] To change the winding length of each roll of foam tape, remove the cover plate 14, then remove the center gear 21 and planetary gear 22. By replacing the center gear 21 and planetary gear 22 with different diameter combinations, the transmission ratio can be changed, thereby adjusting the speed ratio of the inner turntable 4 and the outer turntable 3. This changes the number of rotations the outer turntable 3 needs to make when the inner turntable 4 rotates once, thus adjusting the length of the cut foam tape.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foam adhesive slitting device, characterized in that: The device includes a frame (1), on which a drive motor (11) and an internal gear disk (12) are fixed. The output shaft of the drive motor (11) is fixed to a central shaft (13), and a central gear (21) is fixed to the central shaft (13). A planetary gear (22) is meshed with the internal gear disk (12), and the planetary gear (22) meshes with the central gear (21). An outer shaft (23) is rotatably sleeved on the central shaft (13), and a planet carrier (24) is fixed to the outer shaft (23). The planet carrier (24) is rotatably connected to the planetary gear (22). The central shaft (13) is fixed with an outer turntable (3), the outer shaft (23) is fixed with an inner turntable (4), the outer ring wall of the inner turntable (4) is set close to the inner ring wall of the outer turntable (3), the outer wall of the outer turntable (3) is fixed with a plurality of ring cutting blades (31), the inner turntable (4) is slidably connected with a blade holder (41), the blade holder (41) is fixed with a cutting blade (42), the outer turntable (3) is provided with a through hole (32) for the cutting blade (42) to pass through, and the frame (1) is provided with a drive structure for driving the blade holder (41) to move.

2. The foam adhesive slitting device according to claim 1, characterized in that: The drive structure includes a support rod (16) fixed to the frame (1), a protrusion (17) fixed on the support rod (16), an arc block (44) for contacting the protrusion (17) fixed on the tool holder (41), and a spring (45) fixedly connected between the arc block (44) and the inner turntable (4).

3. The foam adhesive slitting device according to claim 1, characterized in that: The outer ring wall of the inner turntable (4) is rotatably connected to several rollers (46), and the rollers (46) are in rolling contact with the inner ring wall of the outer turntable (3).

4. The foam adhesive slitting device according to claim 1, characterized in that: The planetary gears (22) are evenly arranged in three along the circumference of the internal gear disk (12).

5. The foam adhesive slitting device according to claim 1, characterized in that: The end face of the internal gear disk (12) is provided with a cover plate (14), and the center of the cover plate (14) is provided with a bearing seat (15) for rotatably connecting the central shaft (13).

6. The foam adhesive slitting device according to claim 5, characterized in that: The central shaft (13) and the central gear (21) are connected by a keyway structure to form a sliding connection, and the planet carrier (24) and the planet gear (22) are slidably sleeved together.

7. The foam adhesive slitting device according to claim 6, characterized in that: The cover plate (14) abuts against the end faces of the central gear (21) and the planetary gear (22).

8. The foam adhesive slitting device according to claim 1, characterized in that: The frame (1) is rotatably connected to a support plate (5), which is located below the outer turntable (3). The support plate (5) has an annular groove (51) for the ring cutter (31) to enter.

9. A foam adhesive slitting device according to claim 8, characterized in that: The central shaft (13) is fixed with gear one (61), the support plate (5) is fixed with gear two (62), and the frame (1) is rotatably connected with gear three (63) and gear four (64). Gear three (63) meshes with gear one (61), and gear four (64) meshes with gear three (63) and gear two (62) at the same time.

10. A foam adhesive slitting device according to claim 9, characterized in that: The diameter of gear one (61) is smaller than that of gear two (62), so that the rotational speed of the outer turntable (3) is greater than that of the support disc (5).

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