LDPE film production cutting device and use method thereof

Abstract

The invention discloses an LDPE film production cutting device and a using method thereof.The LDPE film production cutting device comprises a box body, a cutting mechanism, an ejection mechanism, an air blowing mechanism and a conveying mechanism, the cutting mechanism is arranged in the box body and used for processing an LDPE film into a needed shape, the ejection mechanism is arranged in the cutting mechanism and comprises an ejection block, and the ejection block is arranged in the box body; a lifting mechanism is arranged at the top end of the ejection block, a connecting mechanism is arranged between the lifting mechanism and the cutting mechanism, the air blowing mechanism is arranged in the box body, and the conveying mechanism is arranged at the bottom end of the box body. According to the LDPE film cutting device, by means of the arrangement of the ejection mechanism, after a tool cuts off an LDPE film, an ejection block can descend to eject the LDPE film clamped at the bottom of the tool out, so that manual separation is avoided, the LDPE film cutting machining efficiency is improved, through cooperation of a connecting mechanism, a lifting block descends to drive a tool apron to descend, and the LDPE film cutting efficiency is improved. Therefore, the ejection mechanism and the cutting mechanism operate synchronously, the driving cost is reduced, and the working smoothness is improved.

Description

Technical Field

[0001] The invention relates to the technical field of LDPE film processing, and in particular to an LDPE film production and cutting device and a use method thereof. Background Art

[0002] LDPE film is a polyethylene film that requires a cutting process during processing. Die cutting is a cutting process that uses a tool of a specific shape to cut the LDPE film that matches the shape of the tool.

[0003] In the actual die-cutting process, after the tool cuts the LDPE film, there is a phenomenon that the cut LDPE film is stuck at the bottom of the tool. At this time, manual operation is required to remove the LDPE film stuck at the bottom of the tool. However, the entire device needs to stop working during the manual die removal process, resulting in reduced work efficiency. For this reason, we propose an LDPE film production and cutting device and a method of using the device that can improve work efficiency. Summary of the invention

[0004] The object of the present invention is to provide a LDPE film production and cutting device and a method of using the same to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a LDPE film production and cutting device, comprising:

[0006] Box;

[0007] A cutting mechanism, which is arranged inside the box and is used to process the LDPE film into a desired shape;

[0008] An ejection mechanism, the ejection mechanism is arranged inside the cutting mechanism, the ejection mechanism is used to separate the LDPE film stuck at the cutting edge of the cutting mechanism, the ejection mechanism comprises an ejection block, a lifting mechanism is arranged at the top of the ejection block, and a connecting mechanism is arranged between the lifting mechanism and the cutting mechanism;

[0009] An air blowing mechanism, which is arranged inside the box and is used to separate the LDPE film attached to the bottom end of the ejection block;

[0010] A conveying mechanism is arranged at the bottom end of the box body, and is used to move the cut LDPE film.

[0011] Preferably, the cutting mechanism includes a film passing groove opened on one side of the box body, a connecting cavity is opened at the top of the inner wall of the film passing groove, a knife seat is slidably connected to the inner wall of the connecting cavity, a knife is installed at the bottom end of the knife seat, and the ejection block is inserted into the interior of the knife seat.

[0012] Preferably, the lifting mechanism comprises a lifting block fixedly connected to the top of the ejection block, a telescopic cylinder is installed at the top of the box body, and the output end of the telescopic cylinder passes through the top of the box body and is transmission-connected to the top of the lifting block.

[0013] Preferably, a plurality of limit rods are fixedly connected to the top of the inner wall of the connecting cavity, a plurality of limit holes are opened at the top of the lifting block, the outer walls of the plurality of limit rods are movably connected with the inner walls of the plurality of limit holes respectively, wedge plates are fixedly connected on both sides of the knife seat, a wedge groove is opened at the bottom of the inner wall of the connecting cavity, and the outer wall of the wedge plate is slidably connected to the inner wall of the wedge groove.

[0014] Preferably, the connecting mechanism includes a U-shaped seat symmetrically fixedly connected to the top of the knife seat, the inner wall of the U-shaped seat is rotatably connected to a gear, both sides of the lifting block are fixedly connected to a second rack, the outer wall of the second rack is meshingly connected to the outer wall of the gear, and the inner wall of the connecting cavity is symmetrically fixedly connected to a first rack, and the outer wall of the first rack is meshingly connected to the outer wall of the gear.

[0015] Preferably, a blanking trough is provided at the bottom end of the inner wall of the film passing trough, and a support frame is fixedly and interlacedly connected to the inner wall of the blanking trough, a movable groove is provided at the bottom end of the wedge-shaped plate, and a movable plate is movably interlacedly connected to the inner wall of the movable groove, and an extrusion strip is fixedly connected to the bottom end of the movable plate, and a first movable cavity is provided at the top end of the inner wall of the movable groove, and a limiting block is slidably connected to the inner wall of the first movable cavity, and the bottom end of the limiting block is fixedly connected to the top end of the movable plate, and a first spring is arranged at the top end of the limiting block.

[0016] Preferably, the inner wall of the film passing groove is rotatably connected to the first roller on both sides of the support frame, the outer wall of the movable plate is fixedly connected to a connecting plate, the bottom end of the connecting plate is symmetrically fixedly connected to a fixed plate, and a second roller is rotatably connected between the two fixed plates.

[0017] Preferably, the inflation mechanism includes a connecting tube fixedly connected to the inner wall of the knife holder, a connecting hole is provided at the top of the ejection block, the outer wall of the connecting tube is movably connected to the inner wall of the connecting hole, a second movable cavity is provided inside the wedge plate, a first connecting groove is provided between the second movable cavity and the connecting tube, a second connecting groove is provided between the second movable cavity and the first movable cavity, the inner wall of the second movable cavity is slidably connected to a piston plate, the inner wall of the second connecting groove is movably connected to a push rod, the top end of the push rod is fixedly connected to the bottom end of the piston plate, and a second spring is provided at the top end of the piston plate.

[0018] Preferably, the conveying mechanism includes side panels symmetrically fixedly connected to the bottom end of the box body, rotating rollers are symmetrically rotatably connected between the two side panels, a conveyor belt is transmitted between the two rotating rollers, a servo motor is installed on the front side of the side panel, and the output end of the servo motor is transmission-connected to one end of one of the rotating rollers.

[0019] The present invention also provides a method for using the LDPE film production and cutting device, comprising the following steps:

[0020] Step 1: The LDPE film to be cut passes through the film slot. At this time, the telescopic cylinder works to drive the lifting block to descend. The descent of the lifting block drives the second rack to descend. Through the meshing of the gear with the second rack and the first rack, the second rack descends and drives the gear to rotate and descend, so that the knife seat can be lowered. The descent of the knife seat drives the knife to descend. At the same time, the descent of the knife seat drives the wedge plate to descend, so that the movable plate drives the extrusion bar to descend, and the descent of the movable plate drives the second roller to descend. The second roller will first contact the LDPE film, and as it continues to descend, the LDEM film is in a straightened state in the film slot, and then the extrusion bar presses the LDPE film against the top of the support frame, and the tool continues to descend and contacts the LDPE film for cutting;

[0021] Step 2: The lifting block descends to drive the cutting mechanism to work and the ejection block to descend at the same time, and under the meshing of the gear, the first rack and the first rack, the descending speed of the lifting block is twice the descending speed of the tool, that is, when the tool continues to move downward after cutting the LDPE film, the bottom end of the ejection block will extend from the bottom of the tool, so that the ejection block will eject the LDPE film stuck at the bottom of the tool, so that the LDPE film is separated from the tool;

[0022] Step 3: When the ejector block drives the knife holder to continuously descend, the movable plate will squeeze the ejector rod in the first movable chamber, so that the ejector rod drives the piston plate to rise, so that the air in the second movable chamber is squeezed into the connecting pipe through the first connecting groove, and then blown out through the bottom opening of the connecting pipe and enter the interior of the connecting hole, thereby exerting a downward force on the LDPE film attached to the bottom end of the ejector block, so that the attached LDPE film is separated from the ejector block, and the LDPE film falls onto the conveyor belt for transportation.

[0023] Technical effects and advantages of the present invention:

[0024] (1) The present invention utilizes the setting of the ejection mechanism. When the cutter cuts the LDPE film, the ejection block will descend to eject the LDPE film stuck at the bottom of the cutter, thereby avoiding manual separation and improving the LDPE film cutting efficiency. The lifting block descends and drives the cutter seat to descend through the cooperation of the connecting mechanism, so that the ejection mechanism and the cutting mechanism are synchronously operated, reducing the driving cost and improving the smoothness of the work.

[0025] (2) The present invention utilizes the arrangement of the extrusion bar, the support frame, the first roller and the second roller. Before the extrusion bar extrudes the LDPE film, the second roller will first extrude the LDPE film, so that the LDPE film is in a straightened state inside the film passing groove. Then, the extrusion bar will squeeze the LDPE film on the top of the support frame, so as to facilitate the subsequent stable cutting work of the cutting mechanism and ensure the cutting quality of the LDPE film.

[0026] (3) The present invention utilizes the setting of the air blowing mechanism. When the ejection block drives the knife holder to continuously descend, the movable plate will squeeze the ejector rod in the first movable chamber, so that the ejector rod drives the piston plate to rise, thereby allowing the air in the second movable chamber to be squeezed into the connecting tube through the first connecting groove, and then blown out through the bottom opening of the connecting tube. When the ejection block descends to the lowest point, the connecting tube is still inserted in the connecting hole, so that the air in the connecting tube enters the connecting hole and continues to be blown downward, thereby applying a downward force to the LDPE film attached to the bottom end of the ejection block, so that the attached LDPE film is separated from the ejection block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the front cross-sectional structure of the box body of the present invention.

[0029] Figure 3 It is a schematic diagram of the front cross-sectional structure of the knife holder of the present invention.

[0030] Figure 4 For the present invention Figure 3 Schematic diagram of the local enlarged structure at A.

[0031] Figure 5 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point B.

[0032] In the figure: 101, box body; 201, film passing groove; 202, knife seat; 203, knife; 204, connecting cavity; 301, ejector block; 302, lifting block; 303, telescopic cylinder; 304, limiting hole; 305, limiting rod; 401, U-shaped seat; 402, gear; 403, first rack; 404, second rack; 405, wedge plate; 406, wedge groove; 501, blanking chute; 502, support frame; 503, movable plate; 504, extrusion strip; 5 05, movable groove; 506, first movable cavity; 507, first spring; 508, limit block; 601, first roller; 602, connecting plate; 603, fixed plate; 604, second roller; 701, connecting pipe; 702, connecting hole; 703, second movable cavity; 704, first connecting groove; 705, second connecting groove; 706, push rod; 707, piston plate; 708, second spring; 801, side plate; 802, conveyor belt; 803, servo motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides Figure 1-5 The LDPE film production and cutting device shown includes a box body 101, a cutting mechanism, an ejection mechanism, an air blowing mechanism and a conveying mechanism. The cutting mechanism is arranged inside the box body 101. The cutting mechanism is used to process the LDPE film into a desired shape. The LDPE film to be cut passes through the box body 101, and then the LDPE film of the desired shape is cut by the cutting mechanism, and the cut LDPE film is separated from the cutting mechanism by the ejection mechanism, and then the cut LDPE film is separated from the ejection mechanism by the air blowing mechanism and falls onto the conveying mechanism for transportation.

[0035] Among them, the cutting mechanism includes a film passing groove 201 opened on one side of the box body 101, a connecting cavity 204 is opened at the top of the inner wall of the film passing groove 201, the inner wall of the connecting cavity 204 is slidably connected with a knife seat 202, a knife 203 is installed at the bottom end of the knife seat 202, and an ejection block 301 is inserted and arranged inside the knife seat 202. The knife seat 202 drives the knife 203 to descend, and the knife 203 contacts the LDPE film, so that the LDPE film matching the shape of the knife 203 can be cut.

[0036] The ejection mechanism is arranged inside the cutting mechanism, and is used to separate the LDPE film stuck at the cutting edge of the cutting mechanism. The ejection mechanism includes an ejection block 301, and a lifting mechanism is arranged at the top of the ejection block 301. A connecting mechanism is arranged between the lifting mechanism and the cutting mechanism. When the tool 203 cuts the LDPE film, the ejection block 301 will descend to eject the LDPE film stuck at the bottom of the tool 203, thereby avoiding manual separation and improving the LDPE film cutting efficiency.

[0037] Among them, the lifting mechanism includes a lifting block 302 fixedly connected to the top of the ejection block 301, and a telescopic cylinder 303 is installed on the top of the box body 101. The output end of the telescopic cylinder 303 passes through the top of the box body 101 and is transmission-connected to the top of the lifting block 302. The telescopic cylinder 303 can drive the lifting block 302 to descend through the operation of the telescopic cylinder 303, and the descent of the lifting block 302 can drive the ejection block 301 to descend, thereby improving the convenience and stability of the ejection mechanism.

[0038] Among them, a plurality of limiting rods 305 are fixedly connected to the top of the inner wall of the connecting cavity 204, a plurality of limiting holes 304 are opened at the top of the lifting block 302, the outer walls of the plurality of limiting rods 305 are movably connected with the inner walls of the plurality of limiting holes 304, and wedge plates 405 are fixedly connected to both sides of the knife seat 202, a wedge groove 406 is opened at the bottom of the inner wall of the connecting cavity 204, the outer wall of the wedge plate 405 is slidably connected to the inner wall of the wedge groove 406, and the limiting holes 304 and the limiting rods 305 are mutually limited, and the wedge plate 405 and the wedge groove 406 are mutually limited, so that the cutting mechanism and the ejection mechanism can stably perform the lifting and lowering work.

[0039] The connecting mechanism includes a U-shaped seat 401 symmetrically fixedly connected to the top of the knife seat 202, the inner wall of the U-shaped seat 401 is rotatably connected to the gear 402, the two sides of the lifting block 302 are fixedly connected to the second rack 404, the outer wall of the second rack 404 is meshed with the outer wall of the gear 402, the inner wall of the connecting cavity 204 is symmetrically fixedly connected to the first rack 403, the outer wall of the first rack 403 is meshed with the outer wall of the gear 402, and the fixed arrangement of the first rack 403 allows the second rack 404 to drive the gear 402 to move when it descends. Descending, that is, the descending of the lifting block 302 drives the knife holder 202 to descend, so that the ejection mechanism and the cutting mechanism are synchronously operated, which reduces the driving cost and improves the smoothness of the work, and the descending speed of the lifting block 302 is twice the descending speed of the knife holder 202. When the knife 203 completes the cutting action, the bottom end of the ejection block 301 has not yet extended from the bottom end of the knife 203, until the knife 203 continues to descend, the bottom end of the ejection block 301 can be extended from the bottom end of the knife 203, and the LDPE film stuck at the bottom of the knife 203 can be ejected.

[0040] Among them, a blanking trough 501 is provided at the bottom end of the inner wall of the film passing trough 201, and the inner wall of the blanking trough 501 is fixedly connected with a support frame 502, a movable groove 505 is provided at the bottom end of the wedge plate 405, and the inner wall of the movable groove 505 is movably connected with a movable plate 503, and the bottom end of the movable plate 503 is fixedly connected with an extrusion bar 504, and a first movable cavity 506 is provided at the top end of the inner wall of the movable groove 505, and the inner wall of the first movable cavity 506 is slidably connected with a limiting block 508, and the bottom end of the limiting block 508 is fixedly connected with the top of the movable plate 503, and the top of the limiting block 508 is provided with a first spring 507. When the cutting mechanism descends to work, the movable plate 503 will drive the extrusion bar 504 to descend, and the extrusion bar 504 will squeeze the LDPE film at the top of the support frame 502, thereby facilitating the subsequent stable cutting work of the cutting mechanism.

[0041] Among them, the inner wall of the film passing groove 201 and the two sides of the support frame 502 are rotatably connected with the first roller 601, the outer wall of the movable plate 503 is fixedly connected with the connecting plate 602, the bottom end of the connecting plate 602 is symmetrically fixedly connected with the fixed plate 603, and the second roller 604 is rotatably connected between the two fixed plates 603. Before the extrusion bar 504 extrude the LDPE film, the second roller 604 will first extrude the LDPE film, so that the LDPE film is in a straightened state inside the film passing groove 201, thereby ensuring the cutting quality of the LDPE film.

[0042] Among them, the inflation mechanism is arranged inside the box body 101, and the inflation mechanism is used to separate the LDPE film attached to the bottom end of the ejection block 301. The inflation mechanism includes a connecting tube 701 fixedly connected to the inner wall of the knife seat 202, and a connecting hole 702 is opened at the top of the ejection block 301. The outer wall of the connecting tube 701 and the inner wall of the connecting hole 702 are movably connected, and a second active cavity 703 is opened inside the wedge plate 405. A first connecting groove 704 is opened between the second active cavity 703 and the connecting tube 701, and a second connecting groove 705 is opened between the second active cavity 703 and the first active cavity 506. The inner wall of the second active cavity 703 is slidably connected with a piston plate 707, and the inner wall of the second connecting groove 705 is movably connected with a push rod 706. The top of the push rod 706 is connected to the piston The bottom end of the plate 707 is fixedly connected, and a second spring 708 is provided at the top end of the piston plate 707. When the ejection block 301 drives the knife holder 202 to continuously descend, the movable plate 503 will squeeze the ejector rod 706 in the first movable chamber 506, so that the ejector rod 706 drives the piston plate 707 to rise, so that the air in the second movable chamber 703 is squeezed into the connecting pipe 701 through the first connecting groove 704, and then blown out through the bottom opening of the connecting pipe 701. When the ejection block 301 descends to the lowest point, the connecting pipe 701 is still inserted in the connecting hole 702, so that the air in the connecting pipe 701 enters the connecting hole 702 and continues to be blown downward, so that a downward force can be applied to the LDPE film attached to the bottom end of the ejection block 301, so that the attached LDPE film is separated from the ejection block 301.

[0043] Among them, the conveying mechanism is arranged at the bottom end of the box body 101, and the conveying mechanism is used to move the cut LDPE film. The conveying mechanism includes a side panel 801 symmetrically fixedly connected to the bottom end of the box body 101, and rotating rollers are symmetrically rotatably connected between the two side panels 801. A conveyor belt 802 is transmission-arranged between the two rotating rollers. A servo motor 803 is installed on the front of the side panel 801, and the output end of the servo motor 803 is transmission-connected to one end of one of the rotating rollers. The LDPE film blown off by the blowing mechanism falls onto the conveyor belt 802 for transportation. The telescopic cylinder 303 and the servo motor 803 are electrically connected to the external power supply through an external switch, respectively, so that the operator can control the telescopic cylinder 303 and the servo motor 803, thereby improving the safety and convenience of the operation of the telescopic cylinder 303 and the servo motor 803.

[0044] The present invention also provides a method for using the LDPE film production and cutting device, comprising the following steps:

[0045] Step 1: The LDPE film to be cut passes through the film slot 201. At this time, the telescopic cylinder 303 works to drive the lifting block 302 to descend. The lifting block 302 descends and drives the second rack 404 to descend. Through the meshing of the gear 402 with the second rack 404 and the first rack 403, the second rack 404 descends and drives the gear 402 to rotate and descend, so that the knife seat 202 can be lowered. The knife seat 202 descends and drives the knife 203 to descend. At the same time, the knife seat 202 descends and drives the wedge plate 405 to descend, so that the movable plate 503 drives the extrusion bar 504 to descend, and the movable plate 503 descends and drives the second roller 604 to descend. The second roller 604 will first contact the LDPE film, so as to continue to descend, so that the LDEM film is in a straightened state in the film slot 201, and then the extrusion bar 504 presses the LDPE film against the top of the support frame 502, and the knife 203 continues to descend and contacts the LDPE film for cutting;

[0046] Step 2: The lifting block 302 descends to drive the cutting mechanism to work and the ejection block 301 to descend at the same time. Under the meshing of the gear 402, the first rack 403 and the first rack 403, the descending speed of the lifting block 302 is twice the descending speed of the tool 203. That is, when the tool 203 continues to move downward after cutting the LDPE film, the bottom end of the ejection block 301 will extend from the bottom of the tool 203, so that the ejection block 301 will eject the LDPE film stuck at the bottom of the tool 203, so that the LDPE film is separated from the tool 203;

[0047] Step 3: When the ejection block 301 drives the knife holder 202 to continue to descend, the movable plate 503 squeezes the ejector rod 706 in the first movable chamber 506, so that the ejector rod 706 drives the piston plate 707 to rise, so that the air in the second movable chamber 703 is squeezed into the connecting pipe 701 through the first connecting groove 704, and then blown out through the bottom opening of the connecting pipe 701 and enters the interior of the connecting hole 702, thereby exerting a downward force on the LDPE film attached to the bottom end of the ejection block 301, so that the attached LDPE film is separated from the ejection block 301, and the LDPE film falls onto the conveyor belt 802 for transportation.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A LDPE film production and cutting device, characterized in that: include: Box body (101); A cutting mechanism, the cutting mechanism being arranged inside the box (101) and being used for processing the LDPE film into a desired shape; An ejection mechanism, the ejection mechanism is arranged inside the cutting mechanism, the ejection mechanism is used to separate the LDPE film stuck at the cutting edge of the cutting mechanism, the ejection mechanism comprises an ejection block (301), a lifting mechanism is arranged at the top of the ejection block (301), and a connecting mechanism is arranged between the lifting mechanism and the cutting mechanism; An air blowing mechanism, the air blowing mechanism is arranged inside the box body (101), and the air blowing mechanism is used to separate the LDPE film attached to the bottom end of the ejection block (301); A conveying mechanism is arranged at the bottom end of the box body (101), and is used to move the cut LDPE film.

2. A LDPE film production and cutting device according to claim 1, characterized in that: The cutting mechanism comprises a film passing groove (201) opened on one side of the box body (101), a connecting cavity (204) is opened at the top of the inner wall of the film passing groove (201), a knife seat (202) is slidably connected to the inner wall of the connecting cavity (204), a knife (203) is installed at the bottom end of the knife seat (202), and the ejection block (301) is inserted into the interior of the knife seat (202).

3. A LDPE film production and cutting device according to claim 2, characterized in that: The lifting mechanism comprises a lifting block (302) fixedly connected to the top of the ejection block (301); a telescopic cylinder (303) is installed at the top of the box body (101); an output end of the telescopic cylinder (303) passes through the top of the box body (101) and is drivingly connected to the top of the lifting block (302).

4. The LDPE film production and cutting device according to claim 3, characterized in that: A plurality of limiting rods (305) are fixedly connected to the top end of the inner wall of the connecting cavity (204), a plurality of limiting holes (304) are provided at the top end of the lifting block (302), the outer walls of the plurality of limiting rods (305) are movably connected to the inner walls of the plurality of limiting holes (304), wedge plates (405) are fixedly connected to both sides of the knife seat (202), a wedge groove (406) is provided at the bottom of the inner wall of the connecting cavity (204), and the outer wall of the wedge plate (405) is slidably connected to the inner wall of the wedge groove (406).

5. A LDPE film production and cutting device according to claim 4, characterized in that: The connecting mechanism comprises a U-shaped seat (401) symmetrically fixedly connected to the top of the knife seat (202); the inner wall of the U-shaped seat (401) is rotatably connected to a gear (402); both sides of the lifting block (302) are fixedly connected to a second rack (404); the outer wall of the second rack (404) is meshingly connected to the outer wall of the gear (402); the inner wall of the connecting cavity (204) is symmetrically fixedly connected to a first rack (403); the outer wall of the first rack (403) is meshingly connected to the outer wall of the gear (402).

6. The LDPE film production and cutting device according to claim 5, characterized in that: A blanking groove (501) is provided at the bottom end of the inner wall of the film passing groove (201), and a support frame (502) is fixedly inserted and connected to the inner wall of the blanking groove (501); a movable groove (505) is provided at the bottom end of the wedge plate (405), and a movable plate (503) is movably inserted and connected to the inner wall of the movable groove (505), and an extrusion strip (504) is fixedly connected to the bottom end of the movable plate (503); a first movable cavity (506) is provided at the top end of the inner wall of the movable groove (505), and a limit block (508) is slidably connected to the inner wall of the first movable cavity (506), and the bottom end of the limit block (508) is fixedly connected to the top end of the movable plate (503), and a first spring (507) is arranged at the top end of the limit block (508).

7. The LDPE film production and cutting device according to claim 6, characterized in that: The inner wall of the film passing groove (201) and the two sides of the support frame (502) are rotatably connected with a first roller (601), the outer wall of the movable plate (503) is fixedly connected with a connecting plate (602), the bottom end of the connecting plate (602) is symmetrically fixedly connected with a fixed plate (603), and a second roller (604) is rotatably connected between the two fixed plates (603).

8. The LDPE film production and cutting device according to claim 7, characterized in that: The air blowing mechanism comprises a connecting tube (701) fixedly connected to the inner wall of the knife seat (202); a connecting hole (702) is provided at the top of the ejection block (301); the outer wall of the connecting tube (701) is movably connected to the inner wall of the connecting hole (702); a second movable cavity (703) is provided inside the wedge plate (405); a first connecting groove (704) is provided between the second movable cavity (703) and the connecting tube (701); a second connecting groove (705) is provided between the second movable cavity (703) and the first movable cavity (506); a piston plate (707) is slidably connected to the inner wall of the second movable cavity (703); a push rod (706) is movably connected to the inner wall of the second connecting groove (705); the top end of the push rod (706) is fixedly connected to the bottom end of the piston plate (707); and a second spring (708) is provided at the top end of the piston plate (707).

9. The LDPE film production and cutting device according to claim 8, characterized in that: The conveying mechanism comprises a side plate (801) symmetrically fixedly connected to the bottom end of the box body (101); a rotating roller is symmetrically rotatably connected between the two side plates (801); a conveying belt (802) is arranged between the two rotating rollers; a servo motor (803) is installed on the front of the side plate (801); and an output end of the servo motor (803) is drivingly connected to one end of one of the rotating rollers.

10. The method for using the LDPE film production and cutting device according to claim 9, characterized in that: The following steps are involved: Step 1: The LDPE film to be cut passes through the film groove (201), and the telescopic cylinder (303) works to drive the lifting block (302) to descend, and the lifting block (302) descends and drives the second rack (404) to descend. Through the meshing of the gear (402) with the second rack (404) and the first rack (403), the second rack (404) descends and drives the gear (402) to rotate and descend, so that the knife seat (202) can be lowered, and the knife seat (202) descends and drives the tool (203) to descend. At the same time, the knife seat (202) descends, driving the wedge plate (405) to descend, thereby causing the movable plate (503) to drive the extrusion bar (504) to descend, and the movable plate (503) descends, driving the second roller (604) to descend, and the second roller (604) will first contact the LDPE film, and as it continues to descend, the LDEM film is in a straightened state in the film passing groove (201), and then the extrusion bar (504) presses the LDPE film against the top of the support frame (502), and the tool (203) continues to descend to contact the LDPE film for cutting; Step 2: The lifting block (302) descends to drive the cutting mechanism to work and at the same time drive the ejection block (301) to descend, and under the meshing of the gear (402), the first rack (403) and the first rack (403), the descending speed of the lifting block (302) is twice the descending speed of the tool (203), so that when the tool (203) continues to move downward after cutting the LDPE film, the bottom end of the ejection block (301) will extend from the bottom of the tool (203), so that the ejection block (301) will eject the LDPE film stuck at the bottom of the tool (203), so that the LDPE film is separated from the tool (203); Step 3: As the ejection block (301) drives the knife holder (202) to continue to descend, the movable plate (503) squeezes the ejector rod (706) in the first movable chamber (506), causing the ejector rod (706) to drive the piston plate (707) to rise, thereby allowing the air in the second movable chamber (703) to squeeze into the connecting tube (701) through the first connecting groove (704), and then blow out through the bottom opening of the connecting tube (701) and enter the interior of the connecting hole (702), thereby applying a downward force to the LDPE film attached to the bottom end of the ejection block (301), so that the attached LDPE film is separated from the ejection block (301), and the LDPE film falls onto the conveyor belt (802) for transportation.

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