Film cutting mechanism for film blowing machine

Abstract

The utility model discloses a film cutting mechanism for a film blowing machine, and relates to the field of production equipment. The tray comprises a tray body, the bottom of the tray body is communicated with a butt joint, a flat plate is assembled on an opening of the tray body through a stud, the other end of the stud is in threaded connection with a spacer bush, and the bottom end of the spacer bush protrudes out of the bottom of the tray body. Through holes are uniformly formed in the top end of the flat plate and are communicated with the tray; roll shafts are erected on the two sides of the top of the flat plate in the length direction through supports, arranged on the flat plate in a lifting mode and abut against the top end face of the flat plate. A cutting groove is formed in the top of the flat plate, the cutting groove is formed between the roll shafts and is parallel to the roll shafts, and a cutter is inserted into the cutting groove and arranged at the top of the flat plate in a lifting mode through a driving piece. The film cutting device has the beneficial effects that a film is rolled on the flat plate by the roller shaft, so that the film flatly moves along the flat plate, and the film is adsorbed and fixed on the flat plate by utilizing negative pressure during cutting, so that the cutting effect and the cutting precision are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of production equipment, relates to the field of film blowing production, and specifically relates to a film cutting mechanism for a film blowing machine. Background Art

[0002] When using blow molding technology to produce film, after the film is produced and shaped, the film will be rolled up using a winding device so that it can be packaged and transported later. After the film is rolled up to the appropriate specifications on the winding device, the film needs to be cut to cut it off, and the winding shaft is replaced to continue to roll up the film.

[0003] When using a cutter to cut the film, the cutter is mounted in front of the winding device through a bracket, and the film that has been shaped is guided to the winding device by the cutter. The cutter that is only mounted through the bracket is simple in structure and has extremely low cost. However, due to the simple structure of the bracket, it is usually not equipped with a film fixing and guiding device. When cutting the film, if the film flutters, the cutting effect and cutting accuracy will be affected. Utility Model Content

[0004] In order to solve the technical problem that the film has no fixed cutting, which affects the cutting effect and cutting accuracy, the utility model provides a film cutting mechanism for a film blowing machine. The film is rolled on a flat plate by a roller, so that the film moves smoothly along the flat plate, and when cutting, the film is adsorbed and fixed on the flat plate by negative pressure, so as to ensure the cutting effect and cutting accuracy.

[0005] The technical solution adopted by the utility model is: to provide a film cutting mechanism for a film blowing machine, comprising a tray, the bottom of the tray is connected with a butt joint, the tray mouth of the tray is assembled with a flat plate by means of stud bolts, the other end of the stud bolt is threadedly connected with a spacer sleeve, and the bottom end of the spacer sleeve protrudes from the bottom of the tray; through holes are evenly arranged on the top of the flat plate, and the through holes are all connected with the tray; rollers are mounted on both sides of the length direction of the top of the flat plate by means of brackets, the rollers are lifted and set on the flat plate and abut against the top end surface of the flat plate; a cutting groove is arranged on the top of the flat plate, the cutting groove is arranged between the rollers and parallel to the rollers, and a cutter is inserted in the cutting groove, and the cutter is lifted and set on the top of the flat plate by means of a driving member.

[0006] After the flat plate is placed on the mouth of the pallet, it is assembled with the help of stud bolts, so that the flat plate can seal the pallet, and the other end of the stud bolt is equipped with a spacer to support the pallet. The bottom of the spacer protrudes from the bottom end of the pallet, so that the pallet and the supporting surface are kept apart, providing assembly space for the docking joint at the bottom of the pallet, so that the docking tube is connected to the pipeline and the exhaust equipment. When the film moves along the flat plate, the roller mounted on the flat plate moves down to press on the film. The roller pressure constrains and arranges the film so that the film moves smoothly on the flat plate. When the film moves on the flat plate, the cutter is supported above the flat plate without interfering with or damaging the movement of the film. When the film needs to be cut, the exhaust equipment runs and adsorbs and fixes the film through the through holes on the pallet and the flat plate to keep the film flat, and then drives the cutter downward to insert into the cutting groove on the flat plate to cut the film, thereby ensuring cutting accuracy and easy operation.

[0007] To further optimize the technical solution, a sealing strip is attached to the opening of the tray, and the sealing strip is in contact with and attached to the bottom surface of the flat plate.

[0008] The sealing strip at the mouth of the tray improves the sealing between the tray and the flat panel assembly, ensuring reliability in use.

[0009] To further optimize the technical solution, the bracket includes frames disposed on both sides of the roller shaft, the frames are fixedly mounted on the flat plate, and the frames are vertically slidably mounted on the roller shaft with the help of guide components.

[0010] The frame is arranged on both sides of the roller and is installed with the flat plate to support the roller to ensure its stability in operation. The roller can slide vertically along the frame to adjust its position so as to roll the film, which is flexible to use.

[0011] To further optimize the technical solution, the guide assembly includes a vertical slide groove opened on the frame, a slider is slidably installed in the slide groove, a bearing is coaxially assembled on the slider, and the bearing is sleeved with the roller shaft.

[0012] The roller is installed on the frame through a slider. The slider moves vertically along the slide groove to adjust the position of the roller. The slide groove constrains the movement direction of the slider, making its linear lifting smooth and stable, thereby improving the reliability of the roller. The slider assembles the roller through the bearing, making the rotation of the roller more labor-saving.

[0013] To further optimize the technical solution, a mounting hole is coaxially arranged on the slider, the bearing is sleeved with the mounting hole, and a hole retaining ring is clamped in the mounting hole; the hole retaining ring is arranged on both sides of the bearing and respectively abuts against the end face of the bearing.

[0014] The slider is assembled with the bearing through the mounting hole, and the holes on both sides of the bearing are connected with the mounting holes by retaining rings to limit the position of the bearing and ensure the stability and reliability of the bearing operation.

[0015] To further optimize the technical solution, the cutter includes a connecting rod, and the driving parts are arranged on both sides of the connecting rod and fixedly installed with the flat plate; an assembly groove is provided at the bottom end of the connecting rod, and a blade is inserted into the assembly groove. The blade is fixed to the connecting rod by means of a pin, and the blade is inserted into the cutting groove.

[0016] The blade used for film cutting is mounted on a flat plate through a connecting rod, and the driving parts are arranged on both sides of the connecting rod and assembled with the flat plate to drive the blade to rise and fall to achieve the cutting operation. The blade is assembled with the connecting rod through an assembly groove and a pin, which is convenient for disassembly and assembly. The structure is simple and the use is stable and reliable.

[0017] To further optimize the technical solution, the driving component includes a linear servo motor fixedly mounted on the flat plate by means of an assembly part, and an output end of the linear servo motor is fixedly mounted by means of a cylinder flange and a connecting rod.

[0018] The linear servo drives the connecting rod to rise and fall on the flat plate, driving the blade to move to cut the film. The linear servo has precise and stable control, which improves the cutting accuracy.

[0019] To further optimize the technical solution, the assembly includes a support that is detachably mounted to the flat plate side wall by means of bolts, and the support is fixedly mounted to the linear servo.

[0020] The linear servo is assembled on the flat plate through a support. The support and the flat plate are detachable, which makes it easy to disassemble and maintain.

[0021] To further optimize the technical solution, the outer surface of the flat plate is coated with a Teflon coating.

[0022] The Teflon coating on the plate reduces the friction resistance of the film moving along the plate, allowing the film to move smoothly and avoiding wear on the film, thereby improving safety in use.

[0023] The beneficial effects of the utility model are:

[0024] 1. When the film passes between the flat plate and the roller, the slider supporting the roller moves in the slide slot to prevent the roller from swinging and affecting the roller finishing effect on the film. The slider is driven without power, so that the roller falls on the film only by gravity, and rotates along the bearing with the movement of the film, reducing the rolling resistance, so that the film can move smoothly on the flat plate while avoiding rolling damage to the film, thereby improving the safety of use;

[0025] 2. The stud bolts seal the flat plate at the tray mouth to seal the tray. When cutting the film, the exhaust device exhausts air from the tray through the joint at the bottom of the tray, so that the airflow passes through the through holes on the flat plate to suck and fix the film. Then the cutter is pulled into the cutting groove to complete the cutting of the film. Since the film is flat and fixed on the flat plate, the cutting accuracy of the film is guaranteed.

[0026] 3. The blade used for cutting the film is mounted on the flat plate through the connecting rod supported by the linear offline machine. The linear offline machine drives the lifting and lowering of the connecting rod to provide stable and precise control for the lifting and lowering of the blade, thereby ensuring the cutting accuracy. The blade is plugged into the assembly groove on the connecting rod and fixed by pins. The assembly is simple, and the blade can be easily disassembled and replaced, which is flexible to use.

[0027] 4. When the stud bolts are used to assemble the flat plate and the pallet, a sealing strip is provided at the mouth of the pallet to improve the sealing of the assembly and ensure the performance. The other end of the stud bolt is equipped with a spacer. After the spacer is assembled with the supporting surface, the pallet is supported. The bottom of the spacer protrudes from the bottom of the pallet to keep the pallet and the supporting surface spaced apart, providing assembly space for the docking joint, facilitating the docking joint to be connected with the exhaust equipment through management, and being flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a cross-sectional view of the assembly of the tray and the flat plate of the utility model;

[0030] Figure 3 It is a schematic diagram of the split structure of the tray and the flat plate assembly of the utility model;

[0031] Figure 4 It is a structural schematic diagram of a flat plate of the utility model;

[0032] Figure 5 It is a structural schematic diagram of the cutter of the utility model;

[0033] Figure 6 It is a structural schematic diagram of the roller shaft and the frame of the utility model in a separated state;

[0034] Figure 7 It is a structural schematic diagram of the roller shaft of the utility model;

[0035] Figure 8 It is a structural schematic diagram of the slider of the utility model.

[0036] In the figure, 1, tray; 101, joint; 102, stud bolt; 103, spacer; 104, sealing strip; 2, flat plate; 201, through hole; 202, cutting groove; 3, roller; 4, cutter; 401, connecting rod; 4011, assembly groove; 402, blade; 403, pin; 5, frame; 501, slide groove; 502, slider; 5021, mounting hole; 5022, retaining ring for hole; 6, bearing; 7, linear servo; 8, support. DETAILED DESCRIPTION

[0037] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Please see attached Figure 1-3 , a film cutting mechanism for a film blowing machine includes a pallet 1, a butt joint 101 is connected to the bottom of the pallet 1, the pallet 1 is connected to an air pump or other exhaust equipment through the butt joint 101 and a pipeline, a flat plate 2 is assembled at the opening of the pallet 1 by means of a stud bolt 102, one end of the stud bolt 102 tightens and fixes the flat plate 2 at the opening of the pallet 1, a sealing strip 104 is attached to the opening, the sealing strip 104 enhances the sealing of the assembly of the flat plate 2 and the pallet 1, the other end of the stud bolt 102 is threadedly connected with a spacer 103, the spacer 103 can be tightened and fixed to a supporting surface by bolts to support the pallet 1, and the bottom end of the spacer 103 protrudes from the bottom of the pallet 1, so that the spacer 103 supports the pallet 1 to maintain a gap with the supporting surface, accommodates the butt joint 101 and the pipeline connection, and is flexible to use.

[0039] Please see attached Figure 1 And attached Figure 6-8 , roller shafts 3 are mounted on both sides of the length direction of the top of the flat plate 2 with the help of brackets, and the roller shaft 3 is lifted and lowered on the flat plate 2. The bracket is a frame body 5 arranged on both sides of the roller shaft 3, and the frame body 5 is fixedly installed with the flat plate 2. The frame body 5 is vertically slidably installed with the roller shaft 3 with the help of a guide component. The guide component includes a vertical slide groove 501 opened on the frame body 5, and a slider 502 is slidably installed in the slide groove 501. The slider 502 is coaxially provided with a mounting hole 5021, and a bearing 6 is sleeved in the mounting hole 5021. The bearing 6 is sleeved with the roller shaft 3, so that the slider 502 supports the roller shaft 3, and a hole retaining ring 5022 is clamped in the mounting hole 5021. The hole retaining ring 5022 is arranged on both sides of the bearing 6, and They are respectively in contact with the end faces of the bearing 6, so as to limit the bearing 6 and improve the stability and reliability of the bearing 6. The slider 502 moves along the slide groove 501, driving the roller 3 to rise and fall. The slide groove 501 limits the movement of the slider 502, so that the slider 502 can rise and fall stably in a straight line. Since the slider 502 is not driven by power, the roller 3 is subjected to gravity and abuts against the top surface of the flat plate 2. The blown film passes between the flat plate 2 and the roller 3 and is pressed on the flat plate 2 by the roller 3. When the film moves along the flat plate 2, the roller 3 rolls it, flattens the film on the flat plate 2, and constrains the film. The roller 3 rotates along the bearing 6 with the movement of the film, reducing the rolling resistance of the roller 3.

[0040] Please see attached Figure 2-4The top of the flat plate 2 is evenly provided with through holes 201, and the through holes 201 are all connected to the tray 1. When the air pump or other air extraction equipment connected to the tray 1 extracts air from the tray 1, the airflow passes through the through holes 201 on the flat plate 2 to adsorb and fix the film, so that the film is flatly fixed on the flat plate 2, thereby ensuring the cutting accuracy of the film. The top of the flat plate 2 is provided with a cutting groove 202, which is arranged between the rollers 3 and parallel to the rollers 3. A cutter 4 is inserted in the cutting groove 202, and the cutter 4 is set on the top of the flat plate 2 by means of a driving member to cut the film;

[0041] Please see attached Figure 5 The cutter 4 includes a connecting rod 401 for connecting a blade 402, and a driving member is arranged on both sides of the connecting rod 401. The driving member is a linear servo 7 fixedly mounted on the flat plate 2 by means of an assembly member, and the assembly member is a support 8 detachably mounted on the side wall of the flat plate 2 by means of bolts. The support 8 is fixedly mounted on the linear servo 7, and the output end of the linear servo 7 is fixedly mounted on the connecting rod 401 by means of a cylinder flange. A mounting groove 4011 is provided at the bottom end of the connecting rod 401, and the blade 402 is plugged into the mounting groove 4011, and the blade 402 is pin-connected and fixed to the connecting rod 401 by means of a pin 403. When the linear servo 7 drives the connecting rod 401 to run, the connecting rod 401 pushes the blade 402 upward away from the flat plate 2, and does not interfere with the movement of the film along the flat plate 2. After the connecting rod 401 pulls the blade 402 downward and plugs into the cutting groove 202, the film is cut. It is simple and flexible to use. During the cutting process, the film is adsorbed and fixed on the flat plate 2, so that the film does not deviate, thereby ensuring the cutting accuracy.

[0042] The working principle of the film cutting mechanism for the film blowing machine is as follows: the tray 1 and the flat plate 2 are tightened and assembled by stud bolts 102, and a sealing strip 104 is attached to the mouth of the tray 1 to improve the sealing of the assembly of the tray 1 and the flat plate 2 and ensure the reliability of use. The other end of the stud bolt 102 is connected to the spacer 103, and the spacer 103 supports the tray 1 so that the tray 1 is spaced from the supporting surface, and provides an assembly space for the joint 101 at the bottom of the tray 1 so as to connect the pipeline to the air pump and other suction equipment. After the blown film is guided to the flat plate 2, the film passes between the flat plate 2 and the roller 3 on the flat plate 2, and the roller 3 is pressed on the film by gravity. After the film passes through the flat plate 2 and is connected to the winding device, as the film is wound, the film is driven to move along the flat plate 2, so that the roller 3 rolls the film, so that the film moves smoothly on the flat plate 2, so that the film winding is more flat, and the roller 3 moves along the bearing 6 to reduce the rolling resistance and improve the flexibility of use.

[0043] When the film moves along the flat plate 2, the blade 402 used for cutting the film is mounted above the flat plate 2 by the linear servo 7 and the connecting rod 401, so as not to interfere with or damage the movement of the film. When the film needs to be cut, the exhaust device connected to the tray 1 is first operated to suck the air in the tray 1 to generate negative pressure, which acts on the film through the through hole 201 on the flat plate 2 to adsorb the film flatly on the flat plate 2. Then the linear servo 7 is started to pull the connecting rod 401 downward to drive the blade 402 to insert into the cutting groove 202 on the flat plate 2 to complete the cutting of the film. Since the film is flatly adsorbed on the flat plate 2, the movement of the film is restricted to ensure the cutting accuracy. After the cutting is completed, the blade 402 is pushed away from the flat plate 2 so that the film continues to move along the flat plate 2.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A film cutting mechanism for a film blowing machine, characterized in that: The tray (1) comprises a tray, the bottom of which is connected with a docking joint (101), the tray opening of which is assembled with a plate (2) by means of a stud bolt (102), the other end of which is threadedly connected with a spacer sleeve (103), and the bottom end of the spacer sleeve (103) protrudes from the bottom of the tray (1); the top of the plate (2) is evenly provided with through holes (201), and the through holes (201) are all connected with the tray (1); roller shafts (3) are arranged on both sides of the top of the plate (2) in the length direction by means of brackets, and the roller shafts (3) are arranged on the plate (2) in a lifting manner and are in contact with the top end surface of the plate (2); a cutting groove (202) is arranged on the top of the plate (2) in the width direction, and the cutting groove (202) is arranged between the roller shafts (3), and a cutter (4) is inserted into the cutting groove (202), and the cutter (4) is arranged on the top of the plate (2) in a lifting manner by means of a driving member.

2. The film cutting mechanism for a film blowing machine according to claim 1, characterized in that: The opening of the tray (1) is fitted with a sealing strip (104), and the sealing strip (104) is in contact with and fitted to the bottom surface of the flat plate (2).

3. The film cutting mechanism for a film blowing machine according to claim 1, characterized in that: The support comprises a frame body (5) disposed at both ends of the roller shaft (3); the frame body (5) is fixedly mounted on the flat plate (2), and the frame body (5) is vertically slidably mounted on the roller shaft (3) by means of a guide assembly.

4. The film cutting mechanism for a film blowing machine according to claim 3, characterized in that: The guide assembly comprises a vertical slide groove (501) provided on the frame (5), a slider (502) being slidably installed in the slide groove (501), a bearing (6) being coaxially mounted on the slider (502), and the bearing (6) being sleeved with the roller shaft (3).

5. The film cutting mechanism for a film blowing machine according to claim 4, characterized in that: The slider (502) is coaxially provided with a mounting hole (5021), the bearing (6) is sleeved with the mounting hole (5021), and a hole retaining ring (5022) is clamped in the mounting hole (5021); the hole retaining ring (5022) is arranged on both sides of the bearing (6) and respectively abuts against the end surface of the bearing (6).

6. The film cutting mechanism for a film blowing machine according to claim 1, characterized in that: The cutter (4) comprises a connecting rod (401), and driving parts are arranged on both sides of the connecting rod (401) and fixedly mounted on the plate (2); a mounting groove (4011) is arranged at the bottom end of the connecting rod (401), a blade (402) is inserted into the mounting groove (4011), and the blade (402) is fixed to the connecting rod (401) by means of a pin (403).

7. The film cutting mechanism for a film blowing machine according to claim 1, characterized in that: The driving component comprises a linear steering gear (7) fixedly mounted on the flat plate (2) by means of an assembly component, and an output end of the linear steering gear (7) is fixedly mounted by means of an oil cylinder flange and a connecting rod (401).

8. The film cutting mechanism for a film blowing machine according to claim 7, characterized in that: The assembly part comprises a support (8) which is detachably mounted on the side wall of the flat plate (2) by means of bolts, and the support (8) is fixedly mounted on the linear steering gear (7).

9. The film cutting mechanism for a film blowing machine according to claim 1, characterized in that: The outer surface of the flat plate (2) is coated with a Teflon coating.

Images