Automatic cutting device for EVA foam

Abstract

The utility model belongs to EVA bubble cotton production technical field especially relates to a kind of automatic cutting device for EVA bubble cotton, including cabinet, and the inner wall of cabinet is fixedly installed with placing table by multiple fixed blocks, the upside of placing table is equipped with multiple limit openings, the limit opening is slidably installed with limit block, the upside of limit block is fixedly installed with moving block, this automatic cutting device for EVA bubble cotton, by driving motor output end drive driving disc rotation, driving disc drives four drive blocks movement, when all L-shaped positioning plate is adhered in the side surface of EVA bubble cotton, stop driving motor, then manually rotate positioning bolt, positioning bolt moves downward extrusion slide bar to position slide bar, complete the positioning of L-shaped positioning plate, again rotate adjusting screw rod, adjusting screw rod drives lower pressing plate downward movement, EVA bubble cotton raw material is compacted, complete the fixation of EVA bubble cotton raw material, reach the effect of the fixation of different shape EVA bubble cotton.

Description

Technical Field

[0001] This utility model belongs to the field of EVA foam production technology, and in particular relates to an automatic cutting device for EVA foam. Background Technology

[0002] In the field of EVA foam cutting and processing, EVA foam needs to be cut to meet transportation and other requirements, and cutting equipment is required during the cutting process.

[0003] Chinese patent CN220548344U discloses an automatic cutting device for EVA foam. By rotating a fixed disc and a movable disc, the device can adjust its position and cut continuously without loosening the foam, thus solving the problem of foam displacement during adjustment in traditional devices. At the same time, the device uses a clamping assembly consisting of an L-shaped bracket, a threaded rotating rod, and a bottom pressure plate to fix the foam in place, ensuring initial stability during straight-line cutting.

[0004] The aforementioned patent has the following problems: This patent has several drawbacks in its use: it relies solely on a single L-shaped bracket and a bottom pressure plate, limiting the compression range to a localized area of ​​the foam. Furthermore, the bracket's fixed position prevents it from moving. In actual processing, EVA foam varies in size, and when processing long strips or other shapes of foam, it cannot compress and fix multiple areas. Uncompressed areas may shift due to the foam's softness and high elasticity, causing the cutting trajectory to deviate from the preset path. Therefore, we propose an automatic cutting device for EVA foam. Utility Model Content

[0005] The purpose of this invention is to provide an automatic cutting device for EVA foam to solve the problems mentioned in the background art.

[0006] In view of this, the present invention provides an automatic cutting device for EVA foam, including a cabinet. The inner wall of the cabinet is fixedly installed with a placement platform by a plurality of fixing blocks. The upper side of the placement platform is provided with a plurality of limiting holes. Limiting blocks are slidably installed in the limiting holes. A moving block is fixedly installed on the upper side of the limiting block. A slide rod is slidably installed on the moving block. An L-shaped positioning plate is fixedly installed at one end of the slide rod. A positioning bolt is screwed onto the moving block. The bottom end of the positioning bolt is abutted against the upper side of the slide rod. The upper side of the cabinet has a movable groove, in which a drive rod is slidably installed. A crossbar is fixedly installed on one side of the drive rod, and a laser cutting head is fixedly installed on one side of the crossbar.

[0007] In this technical solution, the cabinet serves as the outer shell and supporting structure of the equipment. The inner wall of the cabinet is fixedly mounted with a placement platform via four mutually perpendicular fixed blocks to support EVA foam raw materials. Four mutually perpendicular limiting slots are provided on the upper side of the placement platform. Limiting blocks are slidably installed within these slots, restricting their movement. A movable block is fixedly installed on the upper side of each limiting block, and a sliding rod is slidably mounted on the movable block, allowing for horizontal extension and retraction. An L-shaped positioning plate is fixedly installed at the end of the sliding rod facing the center of the placement platform, its vertical edge used to position the side of the foam. A positioning bolt is screwed onto the movable block. The bottom end of the positioning bolt can engage with the upper side of the sliding rod to lock it in place. When the EVA foam raw material is placed on the placement platform, the four limiting blocks and their movable blocks move synchronously towards the center. The movable blocks move the sliding rod and the L-shaped positioning plate closer to the foam. Because the foam may not be a standard rectangle or may have placement deviations, the four L-shaped positioning plates will not simultaneously contact the foam. The first L-shaped positioning plate to come into contact with the foam stops moving forward by sliding within the moving block via a slide bar, while the other uncontacted L-shaped positioning plates continue to move forward until all four L-shaped positioning plates are tightly fitted to the four sides of the foam, achieving self-adaptive positioning. Then, the positioning bolts on each moving block are manually tightened to press the slide bar and lock the position of the L-shaped positioning plates. Finally, the EVA foam is cut using a laser cutting head to ensure accurate positioning, effectively prevent the foam from shifting during the cutting process, and greatly improve cutting precision.

[0008] In the above technical solution, further, a drive disk is rotatably installed on the lower side of the placement platform, and multiple arc-shaped openings are provided on the upper side of the drive disk. A drive block is fixedly installed on the lower side of the limiting block, and the drive block fits into the arc-shaped opening. A partition is fixedly installed on the lower side of the placement platform through multiple connecting columns, and a drive motor is fixedly installed on the lower side of the partition. The output end of the drive motor passes through the partition and is fixedly installed on the lower side of the drive disk.

[0009] In this technical solution, a drive disk is rotatably mounted on the underside of the placement platform via bearings. The upper side of the drive disk has four equally spaced arc-shaped openings, which convert rotational motion into radial linear motion. A columnar drive block is fixedly mounted on the underside of the limiting block, with its top end embedded and fitting into the corresponding arc-shaped opening. A partition is fixedly mounted on the underside of the placement platform via multiple connecting columns for mounting a drive motor. The output end of the drive motor passes upward through the partition and is coaxially fixed on the underside of the drive disk via a coupling or other structure. When the drive motor rotates, it drives the drive disk to rotate. The sidewalls of the arc-shaped openings on the drive disk push the embedded drive blocks. Because the drive blocks are fixed to the limiting blocks, and the movement of the limiting blocks is restricted to radial linear motion by the limiting openings, the rotational motion of the drive disk is converted into synchronous radial linear motion of the four drive blocks and the limiting blocks, ensuring the synchronicity and consistency of the movement of the four L-shaped positioning plates.

[0010] In the above technical solution, a sliding opening is further provided on one side of the cabinet, a waste box is slidably installed in the sliding opening, a filter hole is provided on the lower side of the waste box, a fan is fixedly installed on the inner wall of the cabinet, a base plate is fixedly installed on the lower side of the cabinet, and an exhaust port is provided on the lower side of the base plate.

[0011] In this technical solution, the fan is activated during cutting, creating negative pressure inside the cabinet. Foam debris and dust generated during cutting are drawn into the cabinet through the gap between the placement platform and the inner wall, where they settle or are absorbed into the waste bin. Air is then exhausted through filter holes at the bottom of the waste bin and exhaust vents on the base plate, effectively collecting cutting debris and dust, preventing them from flying and polluting the working environment, protecting operator health, and keeping the equipment clean.

[0012] In the above technical solution, a lead screw is rotatably installed in the movable groove, and the drive rod is screwed onto the surface of the lead screw.

[0013] In this technical solution, when the lead screw rotates, it drives the drive rod to move linearly along the moving groove, thereby moving the crossbar and the laser cutting head.

[0014] In the above technical solution, a mobile motor is further fixedly installed on one side of the cabinet, and the output end of the mobile motor is coaxially and fixedly connected to one end of the lead screw.

[0015] In this technical solution, an external controller controls the rotation of a moving motor, thereby driving the lead screw to rotate and providing power.

[0016] In the above technical solution, a limiting rod is slidably installed on the L-shaped positioning plate, a lower pressure plate is fixedly installed at the bottom end of the limiting rod, and an adjusting screw is rotatably installed on the upper side of the lower pressure plate. The adjusting screw is screwed onto the L-shaped positioning plate.

[0017] In this technical solution, after lateral positioning is completed, the adjusting screw is rotated. Since the adjusting screw and the L-shaped positioning plate are threaded together, rotation will cause the adjusting screw to move axially relative to the L-shaped positioning plate, thereby pushing or pulling the lower pressure plate to move up and down along the limiting rod, realizing the pressing or loosening of the upper surface of the foam. This can effectively prevent the thin or large-area foam from warping due to stress release or laser heat during cutting, further ensuring the cutting quality.

[0018] In the above technical solution, the upper height of the cabinet is greater than the upper height of the placement board.

[0019] This technical solution effectively prevents waste material generated during cutting from splashing out of the device.

[0020] The beneficial effects of this utility model are: 1. This automatic cutting device for EVA foam uses a drive motor to rotate a drive disc, which in turn drives four drive blocks. These drive blocks then move corresponding limit blocks, which in turn move corresponding moving blocks. The moving blocks then move corresponding sliding rods, which in turn move L-shaped positioning plates closer to the EVA foam material. When the L-shaped positioning plates are close to the EVA foam material, they adhere to the side of the material. The device then observes whether all four L-shaped positioning plates are in contact with the side of the EVA foam material. Once all L-shaped positioning plates are in contact with the side of the EVA foam, the drive motor is stopped. Next, the positioning bolts are manually rotated, causing them to move downwards and press the sliding rod to position it. This completes the positioning of the L-shaped positioning plates. Finally, the adjusting screw is rotated, causing the lower pressure plate to move downwards and press the EVA foam material firmly, thus fixing the EVA foam material and achieving the effect of fixing EVA foam of different shapes.

[0021] 2. This automatic cutting device for EVA foam uses a fan to create negative pressure in the cabinet during cutting. The debris generated during the cutting process is sucked into the cabinet through the gap between the cabinet and the placement table and collected in the waste box, thus avoiding debris splashing during the cutting process and affecting the operating environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the placement platform in this utility model; Figure 4 This is a schematic diagram of the L-shaped positioning plate and its related structures in this utility model.

[0023] The markings in the diagram are as follows: 1. Cabinet; 2. Placement platform; 3. Lead screw; 4. Drive rod; 5. Crossbar; 6. Laser cutting head; 7. Connecting column; 8. Partition; 9. Waste box; 10. Filter hole; 11. Base plate; 12. Fixing block; 13. Drive plate; 14. Drive motor; 15. Fan; 16. Arc-shaped opening; 17. Limiting opening; 18. Limiting block; 19. Drive block; 20. Moving block; 21. Slide rod; 22. Positioning bolt; 23. L-shaped positioning plate; 24. Limiting rod; 25. Lower pressure plate; 26. Adjusting lead screw; 27. Moving motor. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Example 1: This example provides an automatic cutting device for EVA foam, including a cabinet 1. The inner wall of the cabinet 1 is fixedly installed with a placement platform 2 by a plurality of fixing blocks 12. The upper side of the placement platform 2 is provided with a plurality of limiting holes 17. Limiting blocks 18 are slidably installed in the limiting holes 17. A moving block 20 is fixedly installed on the upper side of the limiting block 18. A slide rod 21 is slidably installed on the moving block 20. An L-shaped positioning plate 23 is fixedly installed at one end of the slide rod 21. A positioning bolt 22 is screwed onto the moving block 20. The bottom end of the positioning bolt 22 is attached to the upper side of the slide rod 21. A movable groove is provided on the upper side of the cabinet 1. A drive rod 4 is slidably installed in the movable groove. A crossbar 5 is fixedly installed on one side of the drive rod 4. A laser cutting head 6 is fixedly installed on one side of the crossbar 5.

[0027] The cabinet 1 serves as the outer shell and supporting structure of the equipment. The inner wall of the cabinet 1 is fixedly mounted with a placement platform 2 by four mutually perpendicular fixed blocks 12, which is used to support EVA foam raw materials. The upper side of the placement platform 2 has four mutually perpendicular limiting ports 17. Limiting blocks 18 are slidably installed in the limiting ports 17, and the movement trajectory of the limiting blocks 18 is restricted by the limiting ports 17. A movable block 20 is fixedly installed on the upper side of the limiting block 18. A sliding rod 21 is slidably installed on the movable block 20 and can be horizontally extended and retracted. An L-shaped positioning plate 23 is fixedly installed at the end of the sliding rod 21 facing the center of the placement platform 2. Its vertical side is used to position the side of the foam. A positioning bolt 22 is screwed onto the movable block 20. The bottom end of the positioning bolt 22 can be engaged with the upper side of the slide bar 21 to lock the slide bar 21. The EVA foam material is placed on the placement table 2, and the four limiting blocks 18 and their moving blocks 20 are driven to move synchronously towards the center. The moving blocks 20 drive the slide bar 21 and the L-shaped positioning plates 23 closer to the foam. Since the foam may not be a standard rectangle or may have placement deviations, the four L-shaped positioning plates 23 will not contact the foam simultaneously. The first L-shaped positioning plate 23 to contact the foam will slide within the moving block 20 via the slide bar 21 and stop moving forward, while the other uncontacted L-shaped positioning plates 23 will continue to move forward until all four L-shaped positioning plates 23 are tightly fitted against the four sides of the foam, achieving self-adaptive positioning. Then, the positioning bolts 22 on each moving block 20 are manually tightened to press the slide bar 21, locking the position of the L-shaped positioning plates 23. Finally, the EVA foam is cut using the laser cutting head 6, ensuring accurate positioning and effectively preventing the foam from shifting during cutting, greatly improving cutting precision.

[0028] Example 2: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: a drive disk 13 is rotatably mounted on the lower side of the placement platform 2. Multiple arc-shaped openings 16 are opened on the upper side of the drive disk 13. A drive block 19 is fixedly mounted on the lower side of the limiting block 18. The drive block 19 fits into the arc-shaped openings 16. A partition 8 is fixedly mounted on the lower side of the placement platform 2 through multiple connecting columns 7. A drive motor 14 is fixedly mounted on the lower side of the partition 8. The output end of the drive motor 14 passes through the partition 8 and is fixedly mounted on the lower side of the drive disk 13.

[0029] Among them, a drive disk 13 is rotatably mounted on the lower side of the placement platform 2 via a bearing. The upper side of the drive disk 13 has four arc-shaped openings 16 with equal angular spacing, which can convert rotational motion into radial linear motion. A columnar drive block 19 is fixedly installed on the lower side of the limiting block 18. The top of the drive block 19 is embedded and fits into the corresponding arc-shaped opening 16. The lower side of the placement platform 2 is fixedly installed with a partition 8 through multiple connecting columns 7 for mounting the drive motor 14 on the lower side. The output end of the drive motor 14 passes upward through the partition 8 and is coaxially fixedly installed on the lower side of the drive disk 13 through a coupling or other structure. When the drive motor 14 rotates, it drives the drive disk 13 to rotate. The side wall of the arc-shaped opening 16 on the drive disk 13 pushes the drive block 19 embedded in it. Since the drive block 19 is fixed to the limiting block 18, and the movement of the limiting block 18 is restricted to radial linear motion by the limiting opening 17, the rotational motion of the drive disk 13 is converted into synchronous radial linear motion of the four drive blocks 19 and the limiting block 18, ensuring the synchronicity and consistency of the movement of the four L-shaped positioning plates 23.

[0030] Example 3: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: a sliding opening is provided on one side of the cabinet 1, a waste box 9 is slidably installed in the sliding opening, a filter hole 10 is provided on the lower side of the waste box 9, a fan 15 is fixedly installed on the inner wall of the cabinet 1, a bottom plate 11 is fixedly installed on the lower side of the cabinet 1, and an exhaust port is provided on the lower side of the bottom plate 11.

[0031] During cutting, the fan 15 is activated, creating negative pressure inside the cabinet 1. Foam debris and dust generated during cutting are drawn into the cabinet 1 through the airflow from the gap between the placement platform 2 and the inner wall of the cabinet 1, where they settle or are absorbed into the waste bin 9. Air is then exhausted through the filter holes 10 at the bottom of the waste bin 9 and the exhaust vents on the base plate 11, effectively collecting the cutting debris and dust, preventing them from flying and polluting the working environment, protecting the health of operators, and keeping the equipment clean.

[0032] Example 4: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: a lead screw 3 is rotatably installed in the moving groove, and a drive rod 4 is screwed onto the surface of the lead screw 3.

[0033] When the lead screw 3 rotates, it drives the drive rod 4 to move linearly along the moving groove, thereby moving the crossbar 5 and the laser cutting head 6.

[0034] Example 5: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: a moving motor 27 is fixedly installed on one side of the cabinet 1, and the output end of the moving motor 27 is coaxially fixedly connected to one end of the lead screw 3.

[0035] The external controller controls the rotation of the moving motor 27, thereby driving the lead screw 3 to rotate and providing power.

[0036] Example 6: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: a limiting rod 24 is slidably installed on the L-shaped positioning plate 23, a lower pressure plate 25 is fixedly installed at the bottom end of the limiting rod 24, and an adjusting screw 26 is rotatably installed on the upper side of the lower pressure plate 25. The adjusting screw 26 is screwed onto the L-shaped positioning plate 23.

[0037] Once lateral positioning is complete, the adjusting screw 26 is rotated. Since the adjusting screw 26 and the L-shaped positioning plate 23 are threaded together, rotation will cause the adjusting screw 26 to move axially relative to the L-shaped positioning plate 23, thereby pushing or pulling the lower pressure plate 25 up and down along the limiting rod 24, thus pressing or loosening the upper surface of the foam. This can effectively prevent thin or large-area foam from warping due to stress release or laser heat during cutting, further ensuring cutting quality.

[0038] Example 7: This example provides an automatic cutting device for EVA foam. In addition to the technical solutions of the above examples, it also has the following technical features: the upper height of the cabinet 1 is greater than the upper height of the placement board.

[0039] Among its features, it effectively prevents waste material generated during cutting from splashing out of the device.

[0040] Working principle: When using the device, first place the EVA foam material to be cut on the placement table 2, then start the drive motor 14. The output of the drive motor 14 drives the drive disk 13 to rotate, the drive disk 13 drives the four drive blocks 19 to move, the drive blocks 19 drive the corresponding limit blocks 18 to move, the limit blocks 18 drive the corresponding moving blocks 20 to move, the moving blocks 20 drive the corresponding sliding rods 21 to move, and the sliding rods 21 drive the L-shaped positioning plates 23 to approach the EVA foam material. When approaching the EVA foam material, the L-shaped positioning plates 23 are in contact with the side of the EVA foam material. At this time, observe whether all four L-shaped positioning plates 23 are in contact with the EVA foam. If the side of the raw material is not in contact with the material, the L-shaped positioning plate 23 needs to be continuously driven to fully contact it. The L-shaped positioning plate 23 that has been in contact will remain in contact with the sliding rod 21 and move relative to the moving block 20. When all the L-shaped positioning plates 23 are in contact with the side of the EVA foam, the drive motor 14 is stopped. Then, the positioning bolt 22 is manually rotated. The positioning bolt 22 moves downward and presses the sliding rod 21 to position the sliding rod 21, thus completing the positioning of the L-shaped positioning plate 23. Then, the adjusting screw 26 is rotated. The adjusting screw 26 drives the lower pressure plate 25 to move downward and press the EVA foam raw material to fix the EVA foam raw material. After fixing, start the moving motor 27. The output end of the moving motor 27 drives the lead screw 3 to rotate. The lead screw 3 drives the drive rod 4 to move. The drive rod 4 drives the crossbar 5 to move. The crossbar 5 drives the laser cutting head 6 to move. Start the laser cutting head 6 to cut the EVA foam material. During the cutting process, the fan 15 is activated to create negative pressure in the cabinet 1. The debris generated during the cutting process will be sucked into the cabinet 1 through the gap between the cabinet 1 and the placement platform 2 and collected by the waste box 9. After the cutting is completed, the device is turned off, the EVA foam material is unlocked, the cut EVA foam is removed, and the cutting is completed.

[0041] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An automatic cutting device for EVA foam, characterized in that, include: The cabinet (1) has a placement platform (2) fixedly installed on its inner wall by a plurality of fixing blocks (12). The upper side of the placement platform (2) is provided with a plurality of limiting ports (17). A limiting block (18) is slidably installed in the limiting port (17). A moving block (20) is fixedly installed on the upper side of the limiting block (18). A sliding rod (21) is slidably installed on the moving block (20). An L-shaped positioning plate (23) is fixedly installed at one end of the sliding rod (21). A positioning bolt (22) is screwed onto the moving block (20). The bottom end of the positioning bolt (22) is in contact with the upper side of the sliding rod (21). A movable groove is provided on the upper side of the cabinet (1), and a drive rod (4) is slidably installed in the movable groove. A crossbar (5) is fixedly installed on one side of the drive rod (4), and a laser cutting head (6) is fixedly installed on one side of the crossbar (5).

2. The automatic cutting device for EVA foam according to claim 1, characterized in that, A drive plate (13) is rotatably mounted on the lower side of the placement platform (2). Multiple arc-shaped openings (16) are provided on the upper side of the drive plate (13). A drive block (19) is fixedly mounted on the lower side of the limiting block (18). The drive block (19) fits into the arc-shaped opening (16). A partition (8) is fixedly mounted on the lower side of the placement platform (2) through multiple connecting columns (7). A drive motor (14) is fixedly mounted on the lower side of the partition (8). The output end of the drive motor (14) passes through the partition (8) and is fixedly mounted on the lower side of the drive plate (13).

3. The automatic cutting device for EVA foam according to claim 1, characterized in that, A sliding opening is provided on one side of the cabinet (1), and a waste box (9) is slidably installed in the sliding opening. A filter hole (10) is provided on the lower side of the waste box (9). A fan (15) is fixedly installed on the inner wall of the cabinet (1). A base plate (11) is fixedly installed on the lower side of the cabinet (1), and an exhaust port is provided on the lower side of the base plate (11).

4. An automatic cutting device for EVA foam according to claim 1, characterized in that, A lead screw (3) is rotatably installed in the movable slot, and the drive rod (4) is screwed onto the surface of the lead screw (3).

5. An automatic cutting device for EVA foam according to claim 4, characterized in that, A mobile motor (27) is fixedly installed on one side of the cabinet (1), and the output end of the mobile motor (27) is coaxially fixedly connected to one end of the lead screw (3).

6. An automatic cutting device for EVA foam according to claim 1, characterized in that, A limiting rod (24) is slidably installed on the L-shaped positioning plate (23). A lower pressure plate (25) is fixedly installed at the bottom end of the limiting rod (24). An adjusting screw (26) is rotatably installed on the upper side of the lower pressure plate (25). The adjusting screw (26) is screwed onto the L-shaped positioning plate (23).

7. An automatic cutting device for EVA foam according to claim 1, characterized in that, The upper height of the cabinet (1) is greater than the upper height of the placement board.

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