Guiding and limiting device of multi-layer co-extrusion film blow molding machine

Abstract

The utility model discloses a guide limiting device of a multi-layer co-extrusion film blow molding machine, and relates to the field of mechanical equipment. The device comprises a herringbone plate and further comprises a bottom plate, a through hole is concentrically formed in the bottom plate, and a plurality of positioning plates are arranged in the through hole in a gathering or diverging mode in the circumferential direction; guide rails are fixedly mounted at the front and rear parts of the top end of the bottom plate; sliding blocks are slidably mounted on two sides of the guide rails; the free ends of the herringbone plates are hinged to the sliding blocks, and two baffles are arranged on the inner side walls of the herringbone plates in a sliding mode. The utility model has the beneficial effects that the sliding block slides along the guide rail to adjust the opening degree of the herringbone plate, the positioning plate and the baffle plate are contacted and attached with the membrane tube, different positions of the membrane tube are positioned and restrained, the swing of the membrane tube is limited, the production quality is guaranteed, the operation is simple and convenient, and the use is flexible.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment and relates to a blow molding machine, in particular to a guide and limiting device of a multi-layer co-extrusion film blow molding machine. Background Art

[0002] When a multi-layer co-extrusion blow molding machine is producing thin films, a herringbone plate is usually used on the production line to connect the extrusion process and the blow molding process. That is, after the raw material is extruded by the extruder, a film tube of a certain shape is formed, and the film tube is passed through the herringbone plates. Through the guidance and adjustment of the herringbone plates, the film tube is arranged and positioned at a certain angle and position for subsequent blowing and pulling operations.

[0003] The herringbone plate currently used is set between the extrusion process and the blow molding process through a frame. The herringbone plate is connected to the guide roller through the frame. The guide roller has a smooth surface and rotates along the frame to ensure the smooth movement of the film tube and avoid damage to the film tube. The top of the frame is hinged, and the opening and closing degree of the herringbone plate is adjusted by adjusting the position of the end of the frame on the frame to control the shape of the film. The opening and closing adjustment of the herringbone plate on the frame requires the use of measuring tools, which is inconvenient to operate. In addition, the herringbone plate has a single structure, which makes it easy for the film tube to be offset in the herringbone plate, causing wrinkles and ripples in the film, affecting the product quality and aesthetics. Utility Model Content

[0004] The utility model is to solve the technical problems that the opening and closing degree of the herringbone plate is inconvenient to adjust and the film tube is easy to swing, and provides a guide limiter for a multi-layer co-extrusion film blowing machine. The sliding of the slider along the guide rail adjusts the opening and closing degree of the herringbone plate, and the positioning plate and the baffle are in contact with the film tube to position and constrain different positions of the film tube, limit the swing of the film tube, ensure production quality, and is easy to operate and flexible to use.

[0005] The technical solution adopted by the utility model is: to provide a guiding and limiting device for a multi-layer co-extrusion film blowing machine, including a herringbone plate and a bottom plate, the bottom plate is concentrically provided with a through hole, and a plurality of positioning plates are circumferentially gathered or divergently provided in the through hole; guide rails are fixedly installed at the front and rear parts of the top of the bottom plate, and sliders are slidably installed on both sides of the guide rails; the free ends of the herringbone plate are hinged to the sliders, and the inner side walls of the herringbone plate are slidably provided with two baffles.

[0006] When the extruded film tube passes through the through hole and the herringbone plate from bottom to top, the positioning plate and the baffle plate are adjusted along the through hole and the herringbone plate respectively, and contact and fit with the outer wall of the film tube, so as to synchronously constrain the different positions of the film tube to avoid the film tube from swinging and make the surface of the film tube flat. The slider moves along the guide rail to adjust the opening and closing degree of the herringbone plate and control the shrinkage of the film production. It is easy to operate and flexible to use.

[0007] To further optimize the technical solution, a multi-jaw chuck is fixedly installed on the top of the base plate, the multi-jaw chuck is coaxially arranged with the through hole, and the claws of the multi-jaw chuck are respectively fixedly installed with the positioning plate.

[0008] The positioning plate is assembled with the base plate by means of a multi-jaw chuck. The multi-jaw chuck synchronously adjusts the position of the positioning plate according to the specifications of the membrane tube so that it can contact the membrane tube, guide and constrain the membrane tube to prevent the membrane tube from swinging. The operation is simple and the position movement of the positioning plate is accurate.

[0009] To further optimize the technical solution, the guide rail includes a box body fixedly installed on the base plate by means of a connecting frame, a slider is slidably arranged in the box body, and a bidirectional screw rod is rotatably installed in the box body, both ends of the outer wall of the bidirectional screw rod are threadedly connected with nuts, and the nuts are fixedly mounted on the sliders respectively.

[0010] The two-way screw rod and the nut are engaged to adjust the position of the slider in the box body, so as to adjust the opening and closing degree of the herringbone plate. The opening and closing adjustment is precise and easy to operate. At the same time, the engagement of the two-way screw rod and the nut is self-locking, which prevents the herringbone plate from moving at will and improves the reliability of use.

[0011] To further optimize the technical solution, one end of the bidirectional lead screw passes through the box body and is fixedly connected to a handwheel, and the bidirectional lead screw is connected by means of a transmission assembly.

[0012] The hand wheel makes the rotation of the bidirectional screw rod labor-saving, and the transmission assembly makes the bidirectional screw rod rotate synchronously, so that the opening and closing adjustment of the herringbone plate is simple and the adjustment accuracy is improved.

[0013] To further optimize the technical solution, the transmission assembly includes a chain and a sprocket matched with the chain, and the sprockets are respectively fixedly sleeved with the bidirectional lead screw passing through the box body.

[0014] The sprocket chain transmission structure is simple, stable in use, and has direct transmission, which keeps the rotation of the bidirectional screw rod synchronous and improves the reliability of use.

[0015] To further optimize the technical solution, the connecting frame includes a table top fixedly mounted to the bottom end of the box body, and supporting feet are fixedly mounted along the circumferential direction on the bottom end of the table top, and the supporting feet are fixedly mounted to the bottom plate.

[0016] The connecting frame supports the table top through the supporting legs, and has a simple structure, and is stable and reliable to use. The table top supports the box body, and keeps a distance from the bottom plate, so as not to interfere with the operation of the jaws on the multi-jaw chuck, and is flexible to use.

[0017] To further optimize the technical solution, the herringbone plate includes two rotatably hinged frames, the free ends of the frames are rotatably hinged to the sliders, and rollers are evenly arranged in the frame along the height direction, both ends of the rollers pass through the frame, and anti-slip parts are detachably installed; the rollers are slidably connected to the baffle.

[0018] When the membrane tube moves along the herringbone plate, the roller contacts the membrane tube, making the membrane tube move smoothly and effortlessly, and keeping the surface of the membrane tube flat. The surface of the roller is smooth to avoid damage to the membrane tube. When the roller is installed on the frame, both ends of the roller pass through the frame and are connected with anti-slip parts to ensure smooth and reliable operation of the roller in the frame.

[0019] To further optimize the technical solution, the anti-slip component includes a slot arranged at both ends of the roller shaft and an anti-slip pad engaged with the slot, the diameter of the anti-slip pad is larger than the diameter of the roller shaft, and balls are engaged with the outer wall of the anti-slip pad in a circumferential rolling manner, the balls protrude from the outer wall of the anti-slip pad, and are all in contact with the outer wall of the frame.

[0020] The anti-slip pad is connected to the slot on the roller shaft, which is easy to assemble. The ball bearings arranged on the outer wall of the anti-slip pad abut against the frame, which reduces the friction between the anti-slip pad and the frame, does not interfere with the rotation of the roller shaft, reduces wear, and extends the service life of the anti-slip pad.

[0021] To further optimize the technical solution, the outer wall of the baffle is evenly provided with arc-shaped notches, which are respectively engaged with the roller shaft and rotatably connected with the roller shaft.

[0022] The baffle is connected to the roller shaft through its arc-shaped notch, which is easy to assemble and convenient to adjust the position of the baffle, avoiding mutual interference of the baffles when adjusting the opening and closing of the herringbone plate, thereby improving the flexibility of use. The roller shaft rotates along the notch without affecting the performance of the roller shaft.

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

[0024] 1. When the extruded film tube passes through the through hole and the herringbone plate in turn, the multi-claw chuck adjusts the position of the positioning plate in the through hole according to the specifications of the film tube, so that it contacts the outer wall of the film tube, and the baffle on the herringbone plate also contacts and clamps the film tube, so as to synchronously position and constrain the different positions of the film tube, avoid the film tube from swinging, and improve the flatness of film production;

[0025] 2. The bidirectional screw is connected by a chain and a sprocket so that it can rotate synchronously, so that the slider in the box body can move synchronously, adjust the opening and closing of the herringbone plate, and control the shrinkage of film production. The operation is simple, and the bidirectional screw is engaged with the nut, with high transmission accuracy to ensure the opening and closing adjustment accuracy of the herringbone plate. The bidirectional screw is engaged with the nut and self-locked to avoid the herringbone plate from moving randomly, making the opening and closing adjustment of the herringbone plate reliable;

[0026] 3. When the film tube moves along the herringbone plate, the film tube contacts the roller on the herringbone plate, and the roller rotates along the frame, reducing the movement resistance of the film tube, making the film tube move smoothly, and keeping the surface of the film tube flat. The surface of the roller is smooth to avoid damage to the film tube, ensure the safety of the film tube moving along the herringbone plate, and improve the production quality of the film;

[0027] 4. The anti-slip pads on both sides of the roller abut against the frame through the ball bearings, which makes the roller run stably and reduces the movable clearance of the roller to avoid swinging. The ball bearings reduce the friction between the anti-slip pads and the frame, which does not affect the performance of the roller and reduces the wear of the anti-slip pads, extending their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of the guide and limit device of this embodiment;

[0029] Figure 2 It is a schematic diagram of the structure of the assembly of the base plate and the multi-jaw chuck of this embodiment;

[0030] Figure 3 Schematic diagram of the structure of the bottom plate of this embodiment;

[0031] Figure 4 Schematic diagram of the structure of the guide rail of this embodiment;

[0032] Figure 5 Schematic diagram of the structure of the herringbone plate of this embodiment;

[0033] Figure 6 This is a schematic diagram of the disassembly and assembly structure of the frame and baffle of this embodiment;

[0034] Figure 7 Schematic diagram of the disassembly and assembly structure of the roller shaft and the anti-slip pad of this embodiment;

[0035] Figure 8 Schematic diagram of the structure of the anti-slip pad of this embodiment.

[0036] In the figure, 1, herringbone plate; 101, frame; 102, roller; 1021, slot; 103, anti-slip pad; 1031, ball bearing; 2, bottom plate; 201, through hole; 3, positioning plate; 4, guide rail; 401, connecting frame; 4011, table; 4012, support leg; 402, box body; 403, two-way screw; 4031, hand wheel; 4032, chain; 4033, sprocket; 404, nut; 5, slider; 6, baffle; 601, notch; 7, multi-claw chuck; 701, claw. 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 1-3The guide and limiting device of the multi-layer co-extrusion film blowing machine includes a bottom plate 2, a through hole 201 is concentrically arranged on the bottom plate 2, the extruded film tube passes through the through hole 201, and a plurality of positioning plates 3 are arranged in the through hole 201 for gathering and divergence. According to the specifications of the film tube, the position of the positioning block is adjusted to make it contact with the outer wall of the film tube, so that the film tube is constrained and positioned. The positioning plate 3 can be gathered or diverged with the help of a multi-claw chuck 7, and the multi-claw chuck 7 is fixedly installed on the top of the bottom plate 2, and the multi-claw chuck 7 is coaxially arranged with the through hole 201. The claws 701 of the multi-claw chuck 7 are respectively fixedly installed with the positioning plate 3, and the multi-claw chuck 7 synchronously adjusts the position of the positioning plate 3 so that after it contacts and fits with the film tube, the film tube is prevented from swinging, thereby ensuring the quality of film production;

[0039] Please see attached Figure 2 , 4 The front and rear parts of the top of the bottom plate 2 are fixedly installed with guide rails 4, and sliders 5 are slidably installed on both sides of the guide rails 4. The guide rails 4 include a box body 402 fixedly installed with the bottom plate 2 by means of a connecting frame 401. The connecting frame 401 includes a table 4011 fixedly installed with the bottom end of the box body 402. The bottom end of the table 4011 is evenly provided with supporting feet 4012 along the circumferential direction. The supporting feet 4012 are all fixedly installed on the bottom plate 2. The connecting frame 401 has a simple structure, low use cost, and stable support for the box body 402. The slider 5 is slidably arranged in the box body 402. A bidirectional screw rod 403 is rotatably installed in the box body 402. The outer wall of the bidirectional screw rod 403 is threadedly connected with a screw nut 404. The screw nut 404 is fixedly sleeved with the slider 5 respectively, and the screw nut 404 drives the slider 5 to move along the box body 402 by rotating the bidirectional screw rod 403. One end of the bidirectional screw rod 403 passes through the box body 402 and is fixedly connected with a hand wheel 4031, so that the operation is labor-saving and simple, and the bidirectional screw rod 403 is connected with the transmission component so as to be synchronously controlled. The transmission component includes a chain 4032 and a sprocket 4033 matched with the chain 4032. The sprocket 4033 is fixedly sleeved with the bidirectional screw rod 403 passing through the box body 402 respectively, and the slider 5 in the box body 402 is synchronously moved by rotating the bidirectional screw rod 403 on one side, which is flexible to use.

[0040] Please see attached Figure 5 , 78. The free end of the herringbone plate 1 is hinged to the slider 5. The herringbone plate includes two rotatably hinged frames 101. The free ends of the frames 101 are rotatably hinged to the slider 5. The opening and closing amount of the two frames 101 is adjusted by adjusting the position of the slider 5 on the guide rail 4. Rollers 102 are evenly arranged in the frame 101 along the height direction. When the film tube passes through between the two frames 101, as the film tube moves up along the frame 101, the film tube shrinks and contacts the roller 102. The roller 102 rotates along the frame 101 to reduce the movement resistance of the film tube and keep the surface of the film tube flat. The rollers 102 are arranged on both sides of the frame 101. The ends of the roller shaft 102 pass through the frame 101, and the anti-slip pad 103 is detachably installed, so as to improve the reliability of the roller shaft 102 running on the frame 101. The anti-slip member includes a clamping groove 1021 arranged at both ends of the roller shaft 102 and an anti-slip pad 103 clamped with the clamping groove 1021. The anti-slip pad 103 is easy to disassemble and assemble, and is stable to use. The diameter of the anti-slip pad 103 is larger than the diameter of the roller shaft 102, and the outer wall of the anti-slip pad 103 is clamped with a ball 1031 in a circumferential rolling manner. The ball 1031 is in contact with the outer wall of the frame 101, so as to reduce the wear of the anti-slip pad 103 and the frame 101, and improve the stability of the rotation of the roller shaft 102.

[0041] Please see attached Figure 5 , 6 The inner wall of the herringbone plate 1 is slidably provided with two baffles 6. When the film tube penetrates the herringbone plate 1 and moves upward, the film tube passes between the baffles 6. The baffles 6 limit the moving position of the film tube to prevent the film tube from swinging and causing wrinkles in the film. The baffles 6 are slidably connected with the roller shaft 102 on the herringbone plate 1. The outer wall of the baffle 6 is evenly provided with arc-shaped notches 601. The notches 601 are respectively engaged with the roller shaft 102, so that it is easy to assemble, and the position can be adjusted according to the position of each baffle 6 to avoid mutual interference of the baffles 6. It is flexible to use, and the notch 601 is rotatably connected with the roller shaft 102, does not interfere with the rotation of the roller shaft 102, and is smooth to use.

[0042] The working principle of the guide and limit device of the multi-layer co-extrusion film blowing machine is as follows: the extruded film tube passes through the through hole 201 and the herringbone plate 1 from bottom to top in sequence. When the film tube is pulled at the beginning of the production operation, the multi-claw chuck 7 adjusts the position of the positioning plate 3 in the through hole 201 according to the specifications of the film tube so that it contacts the outer wall of the film tube, and the baffle 6 connected to the roller 102 in the herringbone frame also contacts the film tube, so that it simultaneously produces a constrained positioning effect on different positions of the film tube, thereby avoiding swinging of the film tube when it moves, etc., which affects the production quality and production stability. The two frames 101 can adjust the opening and closing amount of the top ends of the two frames 101 by rotating the bidirectional screw rod 403 on one side, and drive the bidirectional screw rod 403 to run synchronously through the chain 4032, and make the slider 5 slide synchronously along the box body 402, so as to control the shrinkage amount of film production. The operation is simple, and the engagement of the bidirectional screw rod 403 with the nut 404 makes the adjustment and control of the opening and closing angle of the herringbone plate 1 more precise. At the same time, the engagement of the bidirectional screw rod 403 with the nut 404 is self-locking, which prevents the frame 101 from moving randomly and ensures the reliability of use.

Claims

1. A guide and limit device for a multi-layer co-extrusion film blowing machine, comprising a herringbone plate (1), characterized in that: The invention also comprises a bottom plate (2), the bottom plate (2) being concentrically provided with a through hole (201), and a plurality of positioning plates (3) being arranged in a circumferentially gathered or divergent manner in the through hole (201); guide rails (4) are fixedly installed at the front and rear parts of the top end of the bottom plate (2), and sliders (5) are slidably installed on both sides of the guide rails (4); the free ends of the herringbone plate (1) are hinged to the sliders (5), and two baffles (6) are slidably installed on the inner side walls of the herringbone plate (1).

2. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 1, characterized in that: A multi-jaw chuck (7) is fixedly mounted on the top of the base plate (2); the multi-jaw chuck (7) is coaxially arranged with the through hole (201), and the jaws (701) of the multi-jaw chuck (7) are respectively fixedly mounted on the positioning plate (3).

3. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 1, characterized in that: The guide rail (4) comprises a box body (402) fixedly mounted on the bottom plate (2) by means of a connecting frame (401), a slider (5) being slidably arranged in the box body (402), and a bidirectional screw rod (403) being rotatably mounted in the box body (402), both ends of the outer wall of the bidirectional screw rod (403) being threadedly connected with screw nuts (404), and the screw nuts (404) are respectively fixedly mounted on the sliders (5).

4. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 3, characterized in that: One end of the bidirectional lead screw (403) passes through the box body (402) and is fixedly connected to a hand wheel (4031), and the bidirectional lead screw is connected by means of a transmission assembly.

5. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 4, characterized in that: The transmission assembly comprises a chain (4032) and a sprocket (4033) matched with the chain (4032), and the sprockets (4033) are respectively fixedly sleeved with the bidirectional lead screws passing through the box body (402).

6. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 3, characterized in that: The connecting frame (401) comprises a table top (4011) fixedly mounted on the bottom end of the box body (402), and supporting feet (4012) are fixedly mounted on the bottom end of the table top (4011) along the circumferential direction, and the supporting feet (4012) are fixedly mounted on the bottom plate (2).

7. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 1, characterized in that: The herringbone plate (1) comprises two rotatably hinged frames (101), the free ends of the frames (101) being rotatably hinged to the sliders (5), and rollers (102) being evenly arranged in the frames (101) along the height direction, both ends of the rollers (102) passing through the frames (101) and being detachably mounted with anti-dropping parts; the rollers (102) are slidably connected to the baffle (6).

8. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 7, characterized in that: The anti-slip component comprises a clamping groove (1021) arranged at both ends of the roller shaft (102) and an anti-slip pad (103) clamped with the clamping groove (1021); the diameter of the anti-slip pad (103) is larger than the diameter of the roller shaft (102); and a ball (1031) is clamped on the outer wall of the anti-slip pad (103) in a circumferential rolling manner; the ball (1031) protrudes from the outer wall of the anti-slip pad (103) and abuts against the outer wall of the frame body (101).

9. The guide and limit device of the multi-layer co-extrusion film blowing machine according to claim 7, characterized in that: The outer wall of the baffle (6) is evenly provided with arc-shaped notches (601), and the notches (601) are respectively engaged with the roller shaft (102) and are rotationally connected to the roller shaft (102).

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