Heat-resistant polyurethane foam flat cutter

Abstract

The utility model relates to the technical field of foam cutting, in particular to a heat-resistant polyurethane foam flat cutter which comprises a workbench, supporting frames are symmetrically arranged at the top of the workbench, first connecting rods are symmetrically arranged at the tops of the inner sides of the supporting frames, a lifting frame is fixedly connected to the bottoms of the first connecting rods, and a lifting rod is arranged in the top end of the lifting frame. A plurality of springs are arranged in the bottom of the lifting frame, supporting rods are arranged in the bottom ends of the springs and fixedly connected to the top of a fixing frame, and a pressing roller is rotationally connected into the fixing frame. Downward force is applied to the foam board through the compression roller, heat-resistant polyurethane foam is generally of a closed-cell structure, the compressive strength of the heat-resistant polyurethane foam in the vertical direction is high, the characteristic of vertical extrusion can be fully utilized to extrude and fix the foam board, and when hot cutting is carried out, the foam may be softened and drooped due to local heating, so that the foam board cannot be damaged. The vertical extrusion ensures the accuracy of a cutting path by restraining expansion or deformation in the vertical direction.

Description

Technical Field

[0001] This utility model relates to the field of foam cutting technology, and in particular to a heat-resistant polyurethane foam flat cutter. Background Technology

[0002] Rigid polyurethane foam is a high-molecular polymer made primarily from isocyanate and polyether, mixed using specialized equipment with the aid of foaming agents, catalysts, flame retardants, and other additives, and then foamed on-site through high-pressure spraying. Polyurethane foam comes in two types: flexible and rigid. Flexible foam has an open-cell structure, while rigid foam has a closed-cell structure. Flexible foam is further divided into skinned and non-skinned types. Polyurethane foam has a wide range of applications, particularly in furniture, bedding, transportation, refrigeration, construction, and insulation, and has become an indispensable material.

[0003] For example, the foam board forming and cutting device disclosed in Chinese Patent No. CN216914157U works on the principle of "setting up a support mechanism, including a base plate and two slide rails welded to the base plate; a conveying mechanism, which is set above the base plate and includes a baffle for feeding foam boards; a cutting mechanism, which is set above the base plate and includes a cutting component and lifting components set on both sides of the cutting component. The cutting component is used to cut large pieces of foam board into small pieces of foam board, and the lifting components are used to adjust the vertical height of the cutting component and for vertical cutting. This utility model of a foam board forming and cutting device heats the heating wire with an electric heater, places the foam board above the cutting table, and under the action of a spring, the clamping plate can automatically clamp the foam board. The cylinder pushes the foam board to move horizontally and the drive motor drives the heating wire to move vertically, which can cut the foam board horizontally and vertically, increasing the flexibility of the device." The foam board is held and fixed by clamps at both ends, and the spring force works in conjunction with the clamps to fix the foam board. However, when the foam board is hot-cut, the lateral clamping can easily cause the foam board to move, thus affecting the cutting effect. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] A heat-resistant polyurethane foam flat cutter includes a workbench, a support frame symmetrically arranged on the top of the workbench, a first connecting rod symmetrically arranged on the top inner side of the support frame, a lifting frame fixedly connected to the bottom of the first connecting rod, a lifting rod arranged inside the top of the lifting frame, lifting grooves adapted to the lifting rod symmetrically opened on the inner side of the support frame, a plurality of springs arranged inside the bottom of the lifting frame, a support rod arranged inside the bottom end of the springs, the support rod fixedly connected to the top of the fixed frame, and a pressure roller rotatably connected inside the fixed frame.

[0006] As an improvement to the above technical solution, the top of the worktable is provided with several third sliding grooves, and a second slider is slidably connected in the third sliding grooves. A limit plate is provided on the top of the second slider.

[0007] As an improvement to the above technical solution, the top of the workbench is symmetrically provided with a second slide groove, and a first threaded rod is rotatably connected in the second slide groove. One end of the first threaded rod is fixedly connected to the output end of a first motor, and a first slider is threadedly connected to the outer side of the first threaded rod. A fixing rod is provided on the top of the first slider.

[0008] As an improvement to the above technical solution, a fourth sliding groove is provided on the inner side of the fixed rod, and a second threaded rod is rotatably connected in the fourth sliding groove. One end of the second threaded rod is fixedly connected to the output end of a second motor. The second motor is located at the top of the fixed rod, and a lifting plate is threadedly connected to the outer side of the second threaded rod.

[0009] As an improvement to the above technical solution, a second connecting rod is symmetrically arranged at the bottom of the lifting plate, and a cutting frame is arranged at the bottom end of the second connecting rod, with hot cutting wire arranged inside the cutting frame.

[0010] As an improvement to the above technical solution, the workbench is provided with first sliding grooves symmetrically on both sides, and a sliding frame is slidably connected in the first sliding groove. The other end of the sliding frame is located on the outside of the fixed rod.

[0011] The beneficial effects of this utility model are:

[0012] 1. Before being cut, the foam board passes under the pressure rollers of the support frame. The pressure rollers apply a downward force to the foam board. Heat-resistant polyurethane foam is usually a closed-cell structure with high compressive strength in the vertical direction. Vertical extrusion can make full use of this characteristic to compress and fix the foam board. When the pressure rollers are subjected to the reverse force applied by the foam board, they will drive the outer fixing frame to rise together. At the same time, the spring at the top of the fixing frame will also rise together. The spring's own rebound force will apply a downward force, so that the pressure rollers can continuously apply force to the foam board and fix the foam board. The support rod on the inner side of the bottom end of the spring plays a guiding role. Its function is the same as that of the lifting rod in the lifting frame and the lifting groove. Both serve to guide the fixing frame and the lifting frame, so that they can only move up and down, so as not to affect the extrusion effect.

[0013] 2. The foam board is laterally squeezed by the movable second slider and the limiting plate in the third chute. The limiting plate only limits the foam board and does not cause excessive compression. At the same time, the first motor drives the first threaded rod to rotate and drives the first slider to move through the threaded connection, thereby moving the fixed rod together. By moving the fixed rod, the cutting position of the hot cutting wire can be adjusted to meet more processing requirements. Similarly, the second motor drives the second threaded rod to rotate and drives the lifting plate and the cutting frame to move together, thereby moving the hot cutting wire and performing hot cutting processing on the foam board. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the fourth sliding groove in this utility model;

[0016] Figure 3 This is a schematic diagram of the spring structure in this utility model.

[0017] Reference numerals: 1. Workbench; 2. Support frame; 3. Fixed rod; 4. Sliding frame; 5. First slide groove; 6. Second slide groove; 7. Lifting plate; 8. Third slide groove; 9. Second slider; 10. Limiting plate; 11. First connecting rod; 12. Lifting frame; 13. Lifting rod; 14. Spring; 15. Support rod; 16. Fixed frame; 17. Pressure roller; 18. First motor; 19. First threaded rod; 20. First slider; 21. Second motor; 22. Fourth slide groove; 23. Second threaded rod; 24. Second connecting rod; 25. Cutting frame; 26. Hot cutting wire; 27. Lifting groove. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0019] Please refer to Figures 1-3 A heat-resistant polyurethane foam flat cutter includes a workbench 1, a support frame 2 symmetrically arranged on the top of the workbench 1, a first connecting rod 11 symmetrically arranged on the top inner side of the support frame 2, a lifting frame 12 fixedly connected to the bottom of the first connecting rod 11, a lifting rod 13 arranged inside the top of the lifting frame 12, lifting grooves 27 symmetrically opened on the inner side of the support frame 2 to match the lifting rod 13, a plurality of springs 14 arranged inside the bottom of the lifting frame 12, a support rod 15 arranged inside the bottom end of the springs 14, the support rod 15 fixedly connected to the top of the fixed frame 16, and a pressure roller 17 rotatably connected inside the fixed frame 16.

[0020] Specifically, before cutting, the foam board passes under the pressure roller 17 below the support frame 2. The pressure roller 17 applies a downward force to the foam board. Heat-resistant polyurethane foam typically has a closed-cell structure and high compressive strength in the vertical direction. Vertical extrusion fully utilizes this characteristic to compress and fix the foam board. When the pressure roller 17 receives a counterforce from the foam board, it causes the outer fixing frame 16 to rise together. Simultaneously, the spring 14 at the top of the fixing frame 16 is also driven to rise, and the spring 14's own rebound force applies a downward force, thus ensuring that the pressure roller 17 continuously applies force to the foam board and fixes it in place. The support rod 15 on the inner side of the bottom end of the spring 14 acts as a guide, serving the same purpose as the lifting rod 13 in the lifting frame 12 in conjunction with the lifting groove 27—to guide the fixing frame 16 and the lifting frame 12, allowing them to move only up and down to avoid affecting the extrusion effect. During hot cutting, the heat-resistant foam may soften and sag due to localized heating. Vertical extrusion, by constraining expansion or deformation in the vertical direction, ensures the accuracy of the cutting path. Please refer to... Figures 1-3 The top of the workbench 1 is provided with several third slide grooves 8, and a second slider 9 is slidably connected in the third slide groove 8. A limit plate 10 is provided on the top of the second slider 9.

[0021] Specifically, the foam board is laterally squeezed by the movable second slider 9 and the limiting plate 10 in the third groove. The limiting plate 10 only limits the foam board and does not cause excessive compression.

[0022] Please refer to Figures 1-3 The top of the workbench 1 is symmetrically provided with a second slide groove 6. A first threaded rod 19 is rotatably connected in the second slide groove 6. One end of the first threaded rod 19 is fixedly connected to the output end of the first motor 18. The outer side of the first threaded rod 19 is threadedly connected to a first slider 20. A fixed rod 3 is provided on the top of the first slider 20. A fourth slide groove 22 is provided on the inner side of the fixed rod 3. A second threaded rod 23 is rotatably connected in the fourth slide groove 22. One end of the second threaded rod 23 is fixedly connected to the output end of the second motor 21. The second motor 21 is located on the top of the fixed rod 3. A lifting plate 7 is threadedly connected to the outer side of the second threaded rod 23. A second connecting rod 24 is symmetrically provided at the bottom of the lifting plate 7. A cutting frame 25 is provided at the bottom end of the second connecting rod 24. A hot cutting wire 26 is provided inside the cutting frame 25.

[0023] Specifically, the first motor 18 drives the first threaded rod 19 to rotate, and through the threaded connection, drives the first slider 20 to move, thereby driving the fixed rod 3 to move together. By moving the fixed rod 3, the cutting position of the hot cutting wire 26 can be adjusted to meet more processing requirements. Similarly, the second motor 21 drives the second threaded rod 23 to rotate, driving the lifting plate 7 and the cutting frame 25 to move together, thereby driving the hot cutting wire 26 to move and perform hot cutting processing on the foam board.

[0024] Please refer to Figures 1-3 The workbench 1 has symmetrical first slide grooves 5 on both sides, and a sliding frame 4 is slidably connected in the first slide groove 5. The other end of the sliding frame 4 is set on the outside of the fixed rod 3.

[0025] Specifically, when the fixed rod 3 moves, it is made more stable by using the sliding frame 4 in conjunction with the first sliding groove 5, thereby enhancing the cutting effect.

[0026] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A heat-resistant polyurethane foam slitter comprising a worktable (1), characterized in that: The top of the workbench (1) is symmetrically provided with a support frame (2). The top of the inner side of the support frame (2) is symmetrically provided with a first connecting rod (11). The bottom of the first connecting rod (11) is fixedly connected with a lifting frame (12). The top of the lifting frame (12) is provided with a lifting rod (13). The inner side of the support frame (2) is symmetrically provided with lifting grooves (27) that are adapted to the lifting rod (13). The bottom of the lifting frame (12) is provided with several springs (14). The bottom end of the springs (14) is provided with a support rod (15). The support rod (15) is fixedly connected to the top of the fixed frame (16). The fixed frame (16) is rotatably connected with a pressure roller (17).

2. A heat resistant polyurethane foam slitter as claimed in claim 1, characterized in that: The top of the workbench (1) is provided with several third slide grooves (8), and a second slider (9) is slidably connected in the third slide groove (8). A limit plate (10) is provided on the top of the second slider (9).

3. A heat resistant polyurethane foam slitter as defined in claim 1, wherein: The top of the workbench (1) is symmetrically provided with a second slide groove (6), and a first threaded rod (19) is rotatably connected in the second slide groove (6). One end of the first threaded rod (19) is fixedly connected to the output end of the first motor (18). The outer side of the first threaded rod (19) is threadedly connected to a first slider (20), and a fixing rod (3) is provided on the top of the first slider (20).

4. A heat resistant polyurethane foam slitter in accordance with claim 3, characterized in that: The inner side of the fixed rod (3) is provided with a fourth sliding groove (22), and a second threaded rod (23) is rotatably connected in the fourth sliding groove (22). One end of the second threaded rod (23) is fixedly connected to the output end of the second motor (21). The second motor (21) is set at the top of the fixed rod (3), and a lifting plate (7) is threadedly connected to the outer side of the second threaded rod (23).

5. A heat resistant polyurethane foam slitter in accordance with claim 4, characterized in that: The bottom of the lifting plate (7) is symmetrically provided with a second connecting rod (24), and the bottom end of the second connecting rod (24) is provided with a cutting frame (25), and the cutting frame (25) is provided with hot cutting wire (26).

6. The heat-resistant polyurethane foam flat cutter according to claim 1, characterized in that: The workbench (1) has symmetrical first slide grooves (5) on both sides, and a sliding frame (4) is slidably connected in the first slide groove (5). The other end of the sliding frame (4) is located on the outside of the fixed rod (3).

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