Acrylic plate cutting device

Abstract

The present invention provides an acrylic sheet cutting device, comprising a workbench, a clamping mechanism, a crossbeam, a crossbeam fixing mechanism, and a hook knife. The clamping mechanism is disposed at one end of the workbench, the crossbeam is slidably connected to the workbench, the crossbeam fixing mechanism is used to lock the crossbeam to the workbench, and the hook knife is slidably connected to the crossbeam. The present invention overcomes the problem of poor cutting accuracy caused by force fluctuations or judgment errors during manual operation when cutting acrylic sheets. Furthermore, the device has a simple structure and low manufacturing and operating costs.

Description

Technical Field

[0001] The present invention relates to a plate cutting tool, and more particularly to an acrylic plate cutting device. Background Art

[0002] Acrylic sheets, as high-performance sheet materials, offer advantages such as high hardness, excellent weather resistance, and high transparency. They are widely used in fields such as architecture, advertising, and medicine. They can be used to make cabinets, lamps, incubators, and automobile and aircraft doors and windows. However, acrylic is brittle, especially thin sheets. Traditional cutting machines can easily cause them to break, so laser cutting or scribing followed by cutting with a hook knife are commonly used. Laser cutting equipment is too expensive for small-batch processing, while scribing and cutting accuracy are poor. Therefore, the market needs a low-cost, high-precision device for cutting thin acrylic sheets. Patented invention with publication number CN108857088A discloses a method for cutting acrylic sheets. To implement this method, the acrylic sheet to be cut is placed on a cutting table, clamped with a clamping head, and then the laser head is activated to cut the acrylic sheet. However, this invention also uses laser cutting, which, as mentioned above, suffers from the problem of high cost. Summary of the Invention

[0003] Some existing acrylic plate cutting devices have high cutting accuracy but are too expensive, while others have low costs but poor cutting accuracy, making it difficult to strike a balance between processing accuracy and economy. To overcome this shortcoming, the present invention provides an acrylic plate cutting device that has both good cutting accuracy and low cost, striking a balance between processing accuracy and economy.

[0004] The technical solution of the present invention is: an acrylic sheet cutting device comprising a workbench, a clamping mechanism, a crossbeam, a crossbeam fixing mechanism, and a hook knife. The clamping mechanism is disposed at one end of the workbench, the crossbeam is slidably connected to the workbench, the crossbeam fixing mechanism is used to lock the crossbeam to the workbench, and the hook knife is slidably connected to the crossbeam. When using the present invention to cut acrylic sheets, the acrylic sheet is placed on the workbench and clamped by the clamping mechanism. The crossbeam is moved to a position corresponding to the desired size of the acrylic sheet and then locked in the adjusted position by the crossbeam fixing mechanism. The blade of the hook knife is pressed down to a position sufficient to cut the acrylic sheet, and the hook knife is moved along the crossbeam, moving the blade from one edge of the acrylic sheet to the other, thereby cutting the acrylic sheet. During cutting, because the hook knife's movement path is constrained by the crossbeam, the path is fixed and regular, thus overcoming the problem of poor cutting accuracy caused by force fluctuations or judgment errors during manual operation. This device is still a manually operated device with a simple structure and low manufacturing and operating costs, making it suitable for small-batch acrylic sheet cutting.

[0005] Preferably, the workbench comprises a placement panel, a retaining wall, and a pair of slide rails. The retaining wall is taller than the placement panel and located on two adjacent sides of the placement panel. The slide rails are located on a pair of opposite sides of the placement panel. The ends of the crossbeam are slidably connected to the two slide rails. The placement panel supports the acrylic sheet to be cut, while the retaining wall abuts against the edge of the acrylic sheet, providing a positioning reference for the sheet. The crossbeam is connected to the slide rails, enabling it to slide on the workbench, ensuring accurate adjustment of its position along a fixed path.

[0006] Preferably, the clamping mechanism includes a support rod, a handle, a clamping block, a rotating rod and a spring. The support rod is fixed on the workbench, the handle and the rotating rod are respectively hinged on the support rod, the clamping block is connected to the free end of the rotating rod, and the spring is connected between the handle and the rotating rod.

[0007] Preferably, the pressing block is made of an elastic material. Since the pressing block directly contacts the surface of the acrylic plate, the elastic material can form a flexible contact with the acrylic plate, thereby preventing the acrylic plate from being crushed due to excessive pressure.

[0008] As a preferred embodiment, a slide groove is provided on the side of the beam, and the hook knife is slidably connected to the slide groove through a sliding connector. This structure allows the hook knife to move along the beam, and the addition of a bearing can also make the movement smoother.

[0009] Preferably, the hook knife comprises a blade and a blade holder, wherein the blade is detachably connected to the blade holder, and the sliding connection member is connected to the blade holder. The blade is a consumable material that is easily lost, and the blade is detachably connected to the blade holder to facilitate blade replacement.

[0010] Preferably, a scale is provided on the slide rail so as to accurately reflect the position of the hook knife, thereby ensuring the accuracy of cutting.

[0011] Preferably, the crossbeam fixing mechanism includes a screw and a handle, the top of the screw being fixedly connected to the handle, the screw being threadedly connected to the end of the crossbeam, and the screw penetrating the crossbeam along the thickness direction of the crossbeam and then abutting against the top surface of the slide rail. The connection between the crossbeam and the slide rail is provided with an undercut structure. The screw and the crossbeam are threadedly connected, and by turning the screw, the top surface of the slide rail can be pressed to raise the crossbeam. The undercut structure between the crossbeam and the slide rail increases the friction between the crossbeam and the slide rail, thereby locking the crossbeam in position. The handle has a large diameter, and the screw can be driven by directly turning the handle without the use of other tools, which is more labor-saving.

[0012] Preferably, the acrylic plate cutting device further comprises an adjustable support, on which a screw is fixed, which is threadedly connected to the four corners of the bottom of the workbench. The height of the four legs can be adjusted by turning the screw to adapt to an uneven working environment.

[0013] The beneficial effects of the present invention are:

[0014] The invention is suitable for cutting small batches of acrylic sheets, combining high processing precision with good economical efficiency. The problem of poor cutting precision caused by manual force fluctuations or judgment errors can be overcome when cutting acrylic sheets. Furthermore, the device has a simple structure and low manufacturing and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 A schematic structural diagram of another perspective of the present invention;

[0017] Figure 3 Schematic diagram of the matching structure of the hook knife and the crossbeam in the present invention;

[0018] Figure 4 Schematic diagram of the coordination structure between the hook knife and the crossbeam in another perspective of the present invention;

[0019] Figure 5 Schematic diagram of the structure of the pressing mechanism in the present invention in the pressing state;

[0020] Figure 6 Schematic diagram of the structure of the clamping mechanism in the present invention in a released state;

[0021] Figure 7 Schematic diagram of the structure of the beam fixing mechanism in the present invention;

[0022] Figure 8 Schematic diagram of the structure of the hook knife in the present invention;

[0023] Figure 9 Schematic diagram of the connection structure between the hook knife and the crossbeam in Example 3 of the present invention; Schematic diagram of the matching state between the pressing pin and the cutting area pressure plate;

[0024] Figure 10 This is a schematic diagram of the cooperation between the pressing pin and the cutting area pressure plate in Example 3 of the present invention.

[0025] In the figure, 1-workbench, 101-placement panel, 102-retaining wall, 103-slide rail, 2-pressing mechanism, 201-support rod, 202-handle, 203-first pivot, 204-pressing block, 205-rotating rod, 206-spring, 207-second pivot, 208-handle slot, 3-beam, 301-slide slot, 302-pressure pin slot, 303-cutting area pressure plate, 304-guide column, 4-adjustable support, 5-beam fixing mechanism, 501-screw, 502-rotating handle, 503-straight handle, 6-hook knife, 601-blade, 602-knife holder, 603-connecting screw, 604-bearing, 605-touch pressure block, 606-pressure pin, 7-scale, 8-acrylic plate. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to specific embodiments of the drawings.

[0027] Example 1:

[0028] like Figures 1 to 8As shown, an acrylic plate cutting device includes a workbench 1, a clamping mechanism 2, a beam 3, an adjustable support 4, a beam fixing mechanism 5 and a hook knife 6. The clamping mechanism 2 is arranged at one end of the workbench 1, the beam 3 is slidably connected to the workbench 1, the beam fixing mechanism 5 is used to lock the beam 3 to the workbench 1, and the hook knife 6 is slidably connected to the beam 3. The workbench 1 includes a placement panel 101 for supporting the acrylic sheet, a retaining wall 102 for limiting the position of the acrylic sheet, and a pair of slide rails 103. The placement panel 101 is rectangular, and the retaining wall 102 is higher than the placement panel 101. The retaining wall 102 has a two-section structure, forming an L-shape, one section located on one side of the placement panel 101, and the other section located at the front end of the placement panel 101. The slide rails 103 have a T-shaped cross-section and are located on both sides of the placement panel 101. The top surface of the slide rails 103 is provided with a scale 7. The ends of the crossbeam 3 have T-shaped slots that adapt to the slide rails 103. The T-shaped slots cooperate with the slide rails 103 so that the ends of the crossbeam 3 are respectively slidably connected to the two slide rails 103. Because the T-shaped slots have a small mouth and a large bottom, they form an undercut structure at the connection between the crossbeam 3 and the slide rails 103. The clamping mechanism 2 includes a support rod 201, a handle 202, a first pivot 203, a second pivot 207, a clamping block 204, a rotating rod 205, and a spring 206. The support rod 201 is fixed to the workbench 1, and the handle 202 and the rotating rod 205 are hinged to the support rod 201 via the first pivot 203 and the second pivot 207, respectively. The handle 202 is Z-shaped and integrally formed with an operating section, a connecting section, and a driving section. The connecting section is connected to the operating section and the driving section at both ends. The support rod 201 is provided with a handle groove 208, and the handle 202 is located in the handle groove 208. The clamping block 204 is connected to the free end of the rotating rod 205, and the spring 206 is connected between the driving section of the handle 202 and the rotating rod 205. The clamping block 204 is made of an elastic material, which is polyurethane in this embodiment. A sliding groove 301 is provided on the side of the crossbeam 3. This groove 301 is also a T-shaped groove with a small mouth and a large base. The hook knife 6 is slidably connected to the sliding groove 301 via a sliding connector. The hook knife 6 comprises a blade 601, a blade holder 602, and a connecting screw 603. The blade 601 is detachably connected to the blade holder 602, and the connection between the blade 601 and the blade holder 602 is similar to that of a conventional utility knife. The sliding connector is a bearing 604. The connecting screw 603 passes through the bearing 604 and then is threadedly connected to the blade holder 602, thereby connecting the sliding connector to the blade holder 602. The bearing 604 is located in the sliding groove 301. The diameter of the bearing 604 is adapted to the maximum slot width of the sliding groove 301, and the diameter of the connecting screw 603 is adapted to the slot width of the sliding groove 301. The beam fixing mechanism 5 includes a screw 501 and a handle 502. The handle 502 is circular, and a straight handle 503 is integrated on the edge of the handle 502 for easy finger manipulation. The top of the screw 501 is fixedly connected to the handle 502, and the screw 501 is connected to the end of the beam 3 through a thread, and the screw 501 penetrates the beam 3 along the thickness direction of the beam 3 and then abuts against the top surface of the slide rail 103.Screws are fixed on the adjustable support 4 , and the screws are connected to the four corners of the bottom of the placement panel 101 through threads.

[0029] When using the present invention to cut acrylic plates, the acrylic plate 8 is placed on the placement panel 101, and the two adjacent edges of the acrylic plate 8 are respectively against the two inner sides of the retaining wall 102, and the handle 202 is pressed, and the handle 202 is rotated, and the spring 206 pulls the rotating rod 205 to flip, thereby driving the pressing block 204 to press the acrylic plate 8. When the rotating rod 205 is perpendicular to the surface of the acrylic plate 8, the driving section of the handle 202 is parallel to the rotating rod 205, and the spring 206 is parallel to the surface of the acrylic plate 8. At this time, the pressing mechanism 2 forms a self-locking state; rotate the handle 502 to retract the screw 501 into the threaded hole of the beam 3, and the movable space between the slide rail 103 and the beam 3 is released. The dynamic clearance increases, thereby unlocking the crossbeam 3 and the slide rail 103. Referring to the indication of the scale 7, the crossbeam 3 is moved to the corresponding position according to the required size of the acrylic plate 8, and then the handle 502 is rotated in the opposite direction. The screw 501 presses the top surface of the slide rail 103 to lift the crossbeam 3. The undercut structure between the crossbeam 3 and the slide rail 103 increases the friction between the crossbeam 3 and the slide rail 103, so that the crossbeam fixing mechanism 5 locks the adjusted position of the crossbeam 3; press the blade head of the hook knife 6 down to a position sufficient to cut the acrylic plate 8, move the hook knife 6, and slide the hook knife 6 along the slide groove 301, so that the blade head moves from one edge of the acrylic plate 8 to the other edge, and the acrylic plate 8 is cut.

[0030] Example 2:

[0031] The cross-section of the slide rail 103 is a trapezoidal shape with a wide top and a narrow bottom. The ends of the crossbeam 3 have dovetail grooves that fit the slide rail 103. The slide groove 301 is also a dovetail groove with a narrow top and a wide bottom. The sliding connector is a slider that fits into the slide groove 301. The slider's cross-section is an "8" shape formed by two trapezoids. The tool holder 602 is hinged to the outside of the slider. The elastic material used for the pressure block 204 is nylon. The remaining components are the same as in Example 1.

[0032] Example 3:

[0033] like Figure 9 、 Figure 10As shown, the acrylic plate cutting device also includes a cutting area pressure plate 303, which is provided with a cutting slit that allows the blade 601 to pass through. Parallel guide posts 304 are provided at both ends of the cutting area pressure plate 303. The guide posts 304 are adapted to slide through the guide post holes on the beam 3 and are offset from the slide 301. The guide posts 304 have top caps, and the top spring is provided between the top caps and the surface of the beam 3. A pressure pin groove 302 is provided on the beam 3 between the two end guide posts 304. The pressure pin groove passes through the top and bottom surfaces of the beam 3 along the thickness direction of the beam 3, that is, the pressure pin groove 302 is perpendicular to the slide 301. A touch pressure block 605 is fixed on the tool holder 602, and a pressure pin 606 is detachably connected to the bottom of the touch pressure block 605. The length of the pressure pin 606 is slightly greater than the thickness of the beam 3. The position of the pressing pin 606 corresponds to the pressing pin groove 302, so that when the tool holder 602 is turned over, the pressing pin 606 can enter the pressing pin groove 302. A roller is provided at the bottom end of the pressing pin 606. The rest is the same as in Example 1.

[0034] During cutting, when the hook knife 6 is flipped to the cutting state, the blade 601 passes through the cutting slit. At this time, the contact block 605 also flips with the knife holder 602, driving the pressing pin 606 to pass through the pressing pin groove 302, touching the top of the cutting area pressure plate 303, pushing the cutting area pressure plate 303 to overcome the elastic force of the top spring and press down, pressing the cutting area of ​​the acrylic plate 8, and then maintaining the cutting pressure of the blade 601 and moving the knife holder 602. The pressing pin groove 302 moves synchronously with the knife holder 602, always maintaining pressure on the cutting area pressure plate 303, so that the acrylic plates 8 on both sides of the blade 601 can be kept in contact with the placement panel 101 under the pressure of the cutting area pressure plate 303, and the acrylic plate 8 will not be lifted up due to the blunt edge of the blade 601 and the poor cutting, causing problems such as uneven incisions.

Claims

1. An acrylic plate cutting device, characterized in that The invention comprises a workbench (1), a clamping mechanism (2), a crossbeam (3), a crossbeam fixing mechanism (5), a hook knife (6) and a cutting area pressure plate (303), wherein the clamping mechanism (2) is arranged at one end of the workbench (1), the crossbeam (3) is slidably connected to the workbench (1), the crossbeam fixing mechanism (5) is used to lock the crossbeam (3) and the workbench (1), the hook knife (6) is slidably connected to the crossbeam (3), a cutting area pressure plate (303) is provided with a knife-feeding slit for accommodating a blade (601) to pass through, the crossbeam (3) is provided with a pressure pin groove (302) passing through the top and bottom surfaces of the crossbeam (3), a contact block (605) is fixed on the tool holder (602), the bottom of the contact block (605) is detachably connected to a pressure pin (606) which can pass through the pressure pin groove (302) and contact the cutting area pressure plate (303), and a roller is provided at the bottom end of the pressure pin (606).

2. The acrylic plate cutting device according to claim 1, characterized in that The workbench (1) comprises a placement panel (101), a retaining wall (102), and a pair of slide rails (103). The retaining wall (102) is higher than the placement panel (101). The retaining wall (102) is located on two adjacent sides of the placement panel (101). The slide rails (103) are located on a pair of opposite sides of the placement panel (101). The two ends of the crossbeam (3) are respectively slidably connected to the two slide rails (103).

3. The acrylic plate cutting device according to claim 1, characterized in that the pressing The mechanism (2) comprises a support rod (201), a handle (202), a pressing block (204), a rotating rod (205) and a spring (206); the support rod (201) is fixed on the workbench (1); the handle (202) and the rotating rod (205) are respectively hinged on the support rod (201); the pressing block (204) is connected to the free end of the rotating rod (205); and the spring (206) is connected between the handle (202) and the rotating rod (205).

4. The acrylic plate cutting device according to claim 3, characterized in that The pressing block (204) is made of elastic material.

5. The acrylic plate cutting device according to claim 1, characterized in that A sliding groove (301) is provided on the side of the crossbeam (3), and the hook knife (6) is slidably connected to the sliding groove (301) via a sliding connection piece.

6. The acrylic plate cutting device according to claim 5, characterized in that The hook knife (6) comprises a blade (601) and a knife holder (602), wherein the blade (601) is detachably connected to the knife holder (602), and the sliding connection member is connected to the knife holder (602).

7. The acrylic plate cutting device according to claim 2, characterized in that A scale (7) is provided on the slide rail (103).

8. The acrylic plate cutting device according to claim 2, characterized in that The crossbeam fixing mechanism (5) comprises a screw (501) and a rotary handle (502), wherein the top end of the screw (501) is fixedly connected to the rotary handle (502), the screw (501) is connected to the end of the crossbeam (3) via a thread, and the screw (501) passes through the crossbeam (3) and abuts against the top surface of the slide rail (103), and the connection portion between the crossbeam (3) and the slide rail (103) is provided with an undercut structure.

9. The acrylic plate cutting device according to any one of claims 1 to 8, characterized in that It also includes an adjustable support (4), on which a screw is fixed, and the screw is connected to the bottom of the workbench (1) through a thread.

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