EVA sheet cutting device

Abstract

The utility model discloses an EVA (Ethylene Vinyl Acetate) sheet cutting device, which belongs to the field of EVA sheet cutting and comprises a cutting table, an L-shaped support plate is arranged on the cutting table, an air cylinder is arranged at the top of the L-shaped support plate, a connecting block is arranged at the output end of the air cylinder, a cutting knife is arranged at the bottom of a cutting knife position adjusting mechanism, a knife sleeve is sleeved at the knife edge of the cutting knife, and a pressing plate is arranged on the L-shaped support plate in a sliding manner. A rubber sheet is installed at the bottom of the pressing plate, a cutting opening is formed in the cutting table, a laser transmitter is detachably installed at the bottom of the L-shaped supporting plate, and a treading type pressing plate driving mechanism is arranged on the cutting table, the L-shaped supporting plate and the pressing plate. Through cooperative use of the devices, an insertion sleeve is installed at the bottom of the L-shaped supporting plate, a rubber ring is installed on the inner wall of the insertion sleeve, and the laser transmitter is inserted into the insertion sleeve. According to the EVA sheet cutting device, through cooperative use of all the devices, accurate cutting of EVA sheets can be achieved, fixing of the EVA sheets is achieved during cutting, and operation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of EVA sheet cutting technology, specifically an EVA sheet cutting device. Background Technology

[0002] EVA sheets (ethylene-vinyl acetate copolymer) are a multifunctional material widely used in various fields. In the packaging industry, their excellent flexibility (tensile strength ≥10MPa) and transparency (light transmittance ≥90%) make them the preferred choice for food and pharmaceutical packaging films, while also serving as gaskets to improve sealing. In household goods, EVA sheets, due to their chemical resistance (acid and alkali resistance pH 3-11) and ease of processing, are often used to manufacture conduits, containers, and electronic components.

[0003] An investigation revealed that Chinese utility model patent CN217621020U discloses an EVA sheet cutting device, including a lower template and an upper template positioned above the lower template. The lower template has at least one contour cutting hole, and a matching contour cutting post is positioned directly above the contour cutting hole. The contour cutting post is positioned on the upper template. Each contour cutting post has a pressure ring positioned between the lower and upper templates. The upper template has a first guide hole, within which a first guide post is slidably connected. The lower end of the first guide post is connected to the pressure ring, and the upper end has a limiting part. An elastic body with one end abutting against the pressure ring and the other end abutting against the upper template is fitted onto the first guide post. A feeding mechanism is located below the lower template. This cutting device features high cutting accuracy, small deformation, reliable quality, complete overall functionality, and strong practicality.

[0004] While the aforementioned patent effectively fixes the EVA sheet during cutting by using contour-following punches and pressure rings, thus improving cutting accuracy to some extent, the device struggles to precisely lock the cutting position. It can only estimate the cutting position to be below the cutting blade, which further impacts the cutting accuracy and fails to meet the requirements for high-precision EVA sheet cutting.

[0005] Therefore, this utility model provides an EVA sheet cutting device to solve the above problems. Utility Model Content

[0006] This utility model provides an EVA sheet cutting device, including a cutting table, an L-shaped support plate mounted on the cutting table, a cylinder mounted on the top of the L-shaped support plate, a connecting block mounted on the output end of the cylinder, a cutting blade adjusting mechanism at the bottom of the connecting block, a cutting blade mounted at the bottom of the cutting blade adjusting mechanism, a blade sleeve fitted at the blade edge of the cutting blade, a pressure plate slidably mounted on the L-shaped support plate, a rubber sheet mounted at the bottom of the pressure plate, a cutting opening on the cutting table, a laser emitter detachably mounted at the bottom of the L-shaped support plate, and a foot-operated pressure plate driving mechanism provided on the cutting table, the L-shaped support plate, and the pressure plate, aiming to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] As a preferred technical solution of this application, the cutting blade adjustment mechanism includes a rotating sleeve rotatably sleeved on the connecting block, a connecting seat being installed at the bottom of the rotating sleeve, and the cutting blade being installed on the connecting seat.

[0009] As a preferred technical solution of this application, a first support block is installed on the connecting seat, a sleeve is installed on the outer periphery of the connecting block, a locking rod is slidably installed inside the first support block, the end of the locking rod is locked in the sleeve, a tension spring is installed on the locking rod, and the other end of the tension spring is installed on the first support block.

[0010] As a preferred technical solution of this application, a miniature bracket is installed on the side of the connecting seat, a first magnetic block is installed on the miniature bracket, and a second magnetic block is installed on the other end of the clamp rod, the first magnetic block and the second magnetic block are compatible.

[0011] As a preferred technical solution of this application, a contact block is installed on the top surface of the rotating sleeve, a positioning block is installed on the outer periphery of the connecting block, the contact block abuts against the positioning block, a retaining groove is opened on the inner wall of the rotating sleeve, a retaining ring is installed on the outer periphery of the connecting block, and the retaining ring is rotatably installed in the retaining groove.

[0012] As a preferred technical solution of this application, the foot-operated pressure plate driving mechanism includes an integrated frame installed at the bottom of the pressure plate, the integrated frame being inserted through the cutting table, a pedal being installed at the end of the integrated frame, a second support block being installed on the L-shaped support plate, and a return spring being installed on the pressure plate and the second support block.

[0013] As a preferred technical solution of this application, a cross-shaped guide groove is provided on the L-shaped support plate, and a cross-shaped guide block is installed at one end of the pressure plate, and the cross-shaped guide block is slidably installed in the cross-shaped guide groove.

[0014] As a preferred technical solution of this application, a sleeve is installed at the bottom of the L-shaped support plate, a rubber ring is installed on the inner wall of the sleeve, and the laser emitter is inserted into the sleeve.

[0015] In this invention, when the cutting blade is moved, it causes the connecting seat and rotating sleeve to rotate. In turn, the rotation of the connecting seat and rotating sleeve causes the cutting blade and blade sleeve to rotate, causing the cutting blade and blade sleeve to be misaligned with the emitting end of the laser emitter. At this time, the laser point emitted by the laser emitter can be observed, and the laser point emitted by the laser emitter is located on the cutting line marked on the EVA sheet. This can achieve precise positioning of the EVA sheet cutting position and meet the high precision requirements of EVA sheet cutting.

[0016] In this invention, the pedal moves downward when stepped on, which in turn moves the integrated frame, pressure plate, and rubber sheet downward, causing a set of pressure plates to press on the EVA sheet. The rubber sheet directly contacts the EVA sheet, which increases contact friction and prevents the EVA sheet from moving during cutting. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of an EVA sheet cutting device;

[0018] Figure 2 A schematic diagram of the clamping sleeve and clamping rod structure of an EVA sheet cutting device;

[0019] Figure 3 This is a schematic diagram of the positioning block and contact block structure of an EVA sheet cutting device;

[0020] Figure 4 A schematic diagram of the insert and rubber ring structure of an EVA sheet cutting device;

[0021] Figure 5 This is a schematic diagram of the pressure plate and rubber sheet structure of an EVA sheet cutting device.

[0022] In the diagram: 1. Cutting table; 2. L-shaped support plate; 3. Cylinder; 4. Connecting block; 5. Cutting blade adjustment mechanism; 51. Rotating sleeve; 52. Connecting seat; 53. Support block No. 1; 54. Locking rod; 55. Locking sleeve; 56. Tension spring; 57. Miniature bracket; 58. Magnetic block No. 1; 59. Magnetic block No. 2; 510. Positioning block; 511. Contact block; 512. Retention groove; 513. Retention ring; 6. Cutting blade; 7. Blade sleeve; 8. Pressure plate; 9. Rubber sheet; 10. Cutting opening; 11. Laser emitter; 12. Step-type pressure plate driving mechanism; 121. Integrated frame; 122. Pedal; 123. Support block No. 2; 124. Return spring; 125. Cross-shaped guide groove; 126. Cross-shaped guide block; 13. Insert sleeve; 14. Rubber ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0024] like Figure 1-5 As shown, this utility model provides an EVA sheet cutting device, including a cutting table 1. To achieve high-precision cutting of EVA sheets, an L-shaped support plate 2 is installed on the cutting table 1. A cylinder 3 is installed on the top of the L-shaped support plate 2. A connecting block 4 is installed at the output end of the cylinder 3. A cutting blade adjustment mechanism 5 is provided at the bottom of the connecting block 4. A cutting blade 6 is installed at the bottom of the cutting blade adjustment mechanism 5. A blade sleeve 7 is fitted at the blade edge of the cutting blade 6. A pressure plate 8 is slidably arranged on the L-shaped support plate 2. A rubber sheet 9 is installed at the bottom of the pressure plate 8. A cutting opening 10 is opened on the cutting table 1. A laser emitter 11 is detachably installed at the bottom of the L-shaped support plate 2. A foot-operated pressure plate driving mechanism 12 is provided on the cutting table 1, the L-shaped support plate 2 and the pressure plate 8. The cutting lines on the EVA sheet are marked with a marker beforehand. The EVA sheet to be cut is then placed on the cutting table 1, and the cutting lines on the EVA sheet are located within the cutting opening 10. Then, the cutting blade 6 is unlocked by the cutting blade adjustment mechanism 5, and the cutting blade 6 is then moved. The blade sleeve 7 covers the cutting edge of the cutting blade 6, which can ensure that the operator is not cut when the cutting blade 6 is moved. The cutting blade 6 is moved and, under the action of the cutting blade adjustment mechanism 5, it will drive the cutting blade 6 and the blade sleeve 7 to rotate and make the cutting blade 6 and the blade sleeve 7 misalign with the emitting end of the laser emitter 11. At this time, the laser point emitted by the laser emitter 11 can be observed and the laser point emitted by the laser emitter 11 is located on the cutting line marked on the EVA sheet. This can achieve precise positioning of the EVA sheet cutting position and meet the high precision requirements of EVA sheet cutting. Then, the cutting blade 6 is reversed and the cutting blade 6 is reset and fixed by the cutting blade adjustment mechanism 5. Remove the blade sheath 7, then step on the foot-operated pressure plate drive mechanism 12. The foot-operated pressure plate drive mechanism 12 drives a set of pressure plates 8 to press onto the EVA sheet. The rubber sheet 9 directly contacts the EVA sheet, which can increase contact friction and prevent the EVA sheet from moving during cutting. The extension of the cylinder 3 will drive the cutting blade 6 to move downward and accurately cut the cutting line on the EVA sheet, achieving high-precision cutting of the EVA sheet. The operation is relatively convenient.

[0025] Specifically, in order to achieve the rotation adjustment of the cutting blade 6, the cutting blade adjustment mechanism 5 includes a rotating sleeve 51 rotatably sleeved on the connecting block 4, a connecting seat 52 installed at the bottom of the rotating sleeve 51, and the cutting blade 6 installed on the connecting seat 52; when the cutting blade 6 is moved, it will drive the connecting seat 52 and the rotating sleeve 51 to rotate, and the rotation of the connecting seat 52 and the rotating sleeve 51 will in turn drive the cutting blade 6 to rotate and make the cutting blade 6 misaligned with the emitting end of the laser emitter 11, thereby realizing the rotation adjustment of the cutting blade 6.

[0026] Specifically, to facilitate the fixing and rotation adjustment of the cutting blade 6, a first support block 53 is installed on the connecting seat 52, a retaining sleeve 55 is installed on the outer periphery of the connecting block 4, and a retaining rod 54 is slidably installed inside the first support block 53. The end of the retaining rod 54 is engaged in the retaining sleeve 55, and a tension spring 56 is installed on the retaining rod 54. The other end of the tension spring 56 is installed on the first support block 53. In the initial state, the end of the retaining rod 54 is inserted into the retaining sleeve 55, and the tension spring 56 can prevent the retaining rod 54 from falling out of the retaining sleeve 55. At this time, the cutting blade 6 is in a fixed and locked state. Pulling the retaining rod 54 away from the retaining sleeve 55 and pulling the end of the retaining rod 54 out of the retaining sleeve 55 can release the lock on the cutting blade 6, making it easier to rotate and adjust the cutting blade 6.

[0027] Furthermore, to maintain the separation of the locking lever 54 from the sleeve 55, a miniature bracket 57 is installed on the side of the connecting seat 52. A first magnetic block 58 is installed on the miniature bracket 57, and a second magnetic block 59 is installed on the other end of the locking lever 54. The first magnetic block 58 and the second magnetic block 59 are compatible. When the connecting block 4 is pulled, the second magnetic block 59 at the end will attract the first magnetic block 58. It should be noted that when the first magnetic block 58 and the second magnetic block 59 are in contact, the magnetic attraction between the first magnetic block 58 and the second magnetic block 59 is greater than the elastic force of the tension spring 56, which can maintain the separation of the locking lever 54 from the sleeve 55.

[0028] Furthermore, to ensure precise repositioning of the cutting blade 6 before cutting, a contact block 511 is mounted on the top surface of the rotating sleeve 51, and a positioning block 510 is mounted on the outer periphery of the connecting block 4. The contact block 511 rests against the positioning block 510. A retaining groove 512 is formed on the inner wall of the rotating sleeve 51, and a retaining ring 513 is mounted on the outer periphery of the connecting block 4. The retaining ring 513 is rotatably installed in the retaining groove 512. Reversing the cutting blade 6 will cause the rotating sleeve 51 and the contact block 511 to reverse. The reversed contact block 511 rests against the positioning block 510, which can achieve precise repositioning of the cutting blade 6. The retaining ring 513 rotates in the retaining groove 512 to prevent the rotating sleeve 51 from falling off the connecting block 4.

[0029] Specifically, to prevent the EVA sheet from moving during cutting, the foot-operated pressure plate driving mechanism 12 includes an integrated frame 121 installed at the bottom of the pressure plate 8. The integrated frame 121 is inserted through the cutting table 1. A pedal 122 is installed at the end of the integrated frame 121. A second support block 123 is installed on the L-shaped support plate 2. A return spring 124 is installed on the pressure plate 8 and the second support block 123. When the pedal 122 is stepped on, the pedal 122 moves downward. The downward movement of the pedal 122 will drive the integrated frame 121, the pressure plate 8, and the rubber sheet 9 to move downward, so that a set of pressure plates 8 presses on the EVA sheet. The rubber sheet 9 directly contacts the EVA sheet, which can increase the contact friction and prevent the EVA sheet from moving during cutting.

[0030] Furthermore, in order to guide the movement of the pressure plate 8, a cross-shaped guide groove 125 is provided on the L-shaped support plate 2, and a cross-shaped guide block 126 is installed at one end of the pressure plate 8. The cross-shaped guide block 126 is slidably installed in the cross-shaped guide groove 125. The cross-shaped guide block 126 slides in the cross-shaped guide groove 125, which can guide the movement of the pressure plate 8, so that the pressure plate 8 can only move up and down along the cross-shaped guide groove 125.

[0031] Furthermore, to facilitate the assembly and disassembly of the laser emitter 11, a sleeve 13 is installed at the bottom of the L-shaped support plate 2. A rubber ring 14 is installed on the inner wall of the sleeve 13, and the laser emitter 11 is inserted into the sleeve 13. The laser emitter 11 is directly inserted into the sleeve 13. The inner diameter of the rubber ring 14 is slightly smaller than the inner diameter of the laser emitter 11. When the laser emitter 11 is inserted into the sleeve 13, the rubber ring 14 can hold and fix the laser emitter 11 tightly. After long-term use, the laser emitter 11 can be directly removed to replace the battery.

[0032] Working principle: Before use, mark the cutting lines on the EVA sheet with a marker. Then place the EVA sheet to be cut on the cutting table 1, ensuring the cutting lines are within the cutting opening 10. In the initial state, the end of the locking lever 54 is inserted into the sleeve 55, and the cutting blade 6 is positioned above the cutting opening 10. Adjust the position of the cutting blade 6 so that it is misaligned with the emitting end of the laser emitter 11. Pull the locking lever 54 away from the sleeve 55, causing the end of the locking lever 54 to be pulled out of the sleeve 55. At this time, the tension spring 56 will also be stretched. Pulling the locking lever 54 will cause the second magnetic block 59 on its end to attract the first magnetic block 58. It should be noted that when the first magnetic block 58 and the second magnetic block 59 are in contact, the magnetic force between them is greater than the elastic force of the tension spring 56. At this point, the locking lever 54 can be pulled out of the sleeve 55. With the position of lever 54 fixed, the cutting blade 6 is then moved. The blade sleeve 7 covers the blade edge of the cutting blade 6, ensuring that the operator is not cut when the cutting blade 6 is moved. The movement of the cutting blade 6 will cause the connecting seat 52 and the rotating sleeve 51 to rotate. The rotation of the connecting seat 52 and the rotating sleeve 51 will in turn cause the cutting blade 6 and the blade sleeve 7 to rotate and misalign the cutting blade 6 and the blade sleeve 7 with the emitting end of the laser emitter 11. At this time, the laser point emitted by the laser emitter 11 can be observed and positioned on the cutting line marked on the EVA sheet. This can achieve precise positioning of the EVA sheet cutting position and meet the high precision requirements of EVA sheet cutting. Reverse the cutting blade 6. This reversal will cause the rotating sleeve 51 and contact block 511 to reverse as well. The contact block 511, in its reversed position, presses against the positioning block 510, precisely resetting the cutting blade 6. Under the action of the tension spring 56, the locking rod 54 will insert into the locking sleeve 55 to fix the cutting blade 6. Remove the blade sleeve 7, then step on the pedal 122 and activate the cylinder 3. The pedal 122 will move downwards when stepped on, causing the integrating frame 121, pressure plate 8, and rubber sheet 9 to move downwards as well. This will cause a set of pressure plates 8 to press against the EVA sheet, and the rubber sheet 9 will directly contact the EVA sheet, increasing contact friction and preventing the EVA sheet from moving during cutting. The extension of the cylinder 3 will cause the cutting blade 6 to move downwards and precisely cut the cutting line on the EVA sheet, achieving high-precision cutting of the EVA sheet.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An EVA sheet cutting device comprising a cutting table (1), characterized in that: An L-shaped support plate (2) is installed on the cutting table (1). A cylinder (3) is installed on the top of the L-shaped support plate (2). A connecting block (4) is installed at the output end of the cylinder (3). A cutting blade adjustment mechanism (5) is provided at the bottom of the connecting block (4). A cutting blade (6) is installed at the bottom of the cutting blade adjustment mechanism (5). A blade sleeve (7) is fitted at the blade edge of the cutting blade (6). A pressure plate (8) is slidably installed on the L-shaped support plate (2). A rubber sheet (9) is installed at the bottom of the pressure plate (8). A cutting opening (10) is provided on the cutting table (1). A laser emitter (11) is detachably installed at the bottom of the L-shaped support plate (2). A foot-operated pressure plate driving mechanism (12) is provided on the cutting table (1), the L-shaped support plate (2), and the pressure plate (8).

2. The EVA sheet cutting device according to claim 1, characterized in that: The cutting blade adjustment mechanism (5) includes a rotating sleeve, a rotating sleeve (51) provided on the connecting block (4), a connecting seat (52) installed at the bottom of the rotating sleeve (51), and the cutting blade (6) installed on the connecting seat (52).

3. The EVA sheet cutting device according to claim 2, wherein: A first support block (53) is installed on the connecting seat (52). A sleeve (55) is installed on the outer periphery of the connecting block (4). A locking rod (54) is slidably installed inside the first support block (53). The end of the locking rod (54) is locked inside the sleeve (55). A tension spring (56) is installed on the locking rod (54). The other end of the tension spring (56) is installed on the first support block (53).

4. The EVA sheet cutting device according to claim 3, wherein: A miniature bracket (57) is installed on the side of the connector (52), and a first magnetic block (58) is installed on the miniature bracket (57). A second magnetic block (59) is installed on the other end of the lever (54). The first magnetic block (58) and the second magnetic block (59) are compatible.

5. The EVA sheet cutting apparatus according to claim 4, wherein: A contact block (511) is installed on the top surface of the rotating sleeve (51), and a positioning block (510) is installed on the outer periphery of the connecting block (4). The contact block (511) abuts against the positioning block (510). A retaining groove (512) is opened on the inner wall of the rotating sleeve (51), and a retaining ring (513) is installed on the outer periphery of the connecting block (4). The retaining ring (513) is rotatably installed in the retaining groove (512).

6. The EVA sheet cutting device according to claim 1, wherein: The foot-operated pressure plate driving mechanism (12) includes an integrated frame (121) installed at the bottom of the pressure plate (8), the integrated frame (121) is inserted through the cutting table (1), a pedal (122) is installed at the end of the integrated frame (121), a second support block (123) is installed on the L-shaped support plate (2), and a return spring (124) is installed on the pressure plate (8) and the second support block (123).

7. The EVA sheet cutting device according to claim 6, wherein: The L-shaped support plate (2) is provided with a cross-shaped guide groove (125), and a cross-shaped guide block (126) is installed at one end of the pressure plate (8). The cross-shaped guide block (126) is slidably installed in the cross-shaped guide groove (125).

8. The EVA sheet cutting device according to claim 1, wherein: The L-shaped supporting plate (2) is provided with an inserting sleeve (13) at the bottom, the inner wall of the inserting sleeve (13) is provided with a rubber ring (14), and the laser emitter (11) is inserted into the inserting sleeve (13).

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