Stretching traction mechanism for food cast film production

Abstract

The utility model discloses a stretching traction mechanism for food cast film production, which relates to the technical field of cast films, and comprises a bottom plate, two support pieces and two mounting strips, the two support pieces are symmetrically and fixedly connected to two sides of the outer part of the bottom plate, the two mounting strips are symmetrically and fixedly connected to the bottom plate, and the two mounting strips are symmetrically and fixedly connected to the bottom plate. The two mounting strips are symmetrically and fixedly connected to the two sides of the top of the bottom plate; according to the stretching traction mechanism for food cast film production, the stretching structure is arranged, when a certain angle is formed between the lower pressing rollers and the supporting rollers, a certain included angle is formed between the two lower pressing rollers, and when a cast film passes through the supporting rollers of the lower pressing rollers, due to the fact that the certain included angle is formed between the two lower pressing rollers, the cast film can be stretched out; the lower pressing roller can apply force towards the two sides of the cast film on the top of the supporting roller, so that the width of the cast film is adjusted, excessive deformation of the width of the cast film in the stretching process is prevented, and the yield and production efficiency of the cast film in the production process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast film, in particular to a stretching and traction mechanism for producing food cast film. Background Art

[0002] Food cast film is produced through the cast film process, using polymer materials such as polypropylene and polyethylene. The production process includes melt extrusion, cooling and shaping, pulling and stretching, and heat treatment. The film has the advantages of uniform thickness, high transparency, and excellent mechanical properties. It is widely used in food packaging such as cling film and vacuum packaging bags, which can effectively extend the shelf life of food and improve the appearance of packaging.

[0003] For example, the high-toughness cast film stretching equipment with publication number CN220075564U specifically relates to the field of film stretching equipment, including a supporting plate frame, a lifting mechanism is fixedly connected to the top of the supporting plate frame, and a clamping mechanism is fixedly connected to the reverse side of the lifting mechanism, and the clamping mechanism includes a fixing component, an electric push rod, an extension column, a wrapping plate, an electric clamp and a laminating plate. The utility model is connected through the clamping mechanism including a fixing component, an electric push rod, an extension column, a wrapping plate, an electric clamp and a laminating plate. During operation, the internal electric clamp can be directly used for connection operation to clamp and fix the laminating plate, and the processed film surface can be clamped and fixed. Then the internal electric push rod can be directly telescopically adjusted and pulled to directly move the film material at the processing end through the top of the conveyor, so that the personnel can operate the equipment to pull out the film material during operation, thereby improving the processing efficiency.

[0004] The high-toughness cast film stretching equipment in the above technical solution generally improves its structure to achieve the efficiency of the cast film stretching operation. In the actual production process, the cast film is stretched in one direction. In the process of stretching the length of the cast film, the width of the cast film may be reduced, and it needs to be processed secondary to restore its width, which makes the processing steps cumbersome. Utility Model Content

[0005] The utility model aims to provide a stretching and traction mechanism for the production of food cast film, so as to solve the problem in the above-mentioned background technology that in the process of stretching the length of the cast film, the width of the cast film may be reduced, and it needs to be processed twice to restore its width, resulting in cumbersome processing steps.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a food cast film production stretching and traction mechanism, comprising a bottom plate, a support member, and a mounting bar, wherein two support members are provided, and the two support members are symmetrically fixedly connected to the two sides of the outside of the bottom plate, and two mounting bars are provided, and the two mounting bars are symmetrically fixedly connected to the two sides of the top of the bottom plate;

[0007] The inner side of the mounting bar is provided with a stretching structure for stretching the cast film, the stretching structure includes a lower pressure roller, and a connecting groove is provided inside the inner end of the lower pressure roller, and a connecting strip is slidably connected inside the connecting groove, the end of the connecting strip away from the lower pressure roller is rotatably connected to a rotating base block, and a cross shaft is provided at the connection between the rotating base block and the connecting strip, and the rotating base block, the connecting strip and the cross shaft form a universal joint, the end of the lower pressure roller away from the connecting strip is rotatably connected to a positioning ring, and the lower end of the positioning ring is rotatably connected to the inside of the mounting bar;

[0008] Six stretching structures are arranged inside the two mounting strips, and every two stretching structures form a group, and three groups of stretching structures are arranged in equal intervals inside the mounting strips, and an adjustment structure for adjusting the angle of the lower pressure roller is arranged between the three groups of stretching structures;

[0009] Three equally spaced support rollers are fixedly connected to the inner side of the mounting bar, and the three equally spaced support rollers are aligned with the three sets of stretching structures;

[0010] Three equally spaced support rollers are fixedly connected to the inner side of the mounting bar, and the three equally spaced support rollers are aligned with the three sets of stretching structures;

[0011] The end of the bottom plate is provided with a stretching structure for stretching the length of the cast film.

[0012] Preferably, the stretching structure is provided with mounting columns fixedly connected to the four corners of the top of the base plate, and a driving roller is rotatably connected between two mounting columns, the driving roller is also rotatably connected between the two ends of the two mounting strips, and a conveyor belt is rotatably connected to the outer sides of the two driving rollers, and the driving roller is driven by a motor.

[0013] Preferably, the stretching structure also includes a stretching roller rotatably connected between two mounting posts, and the stretching roller and the driving roller inside the mounting posts are vertically distributed to each other, and the stretching roller is in contact with the outer side of the conveyor belt, and the stretching roller is driven by a motor.

[0014] Preferably, two tensile structures are provided, and the two tensile structures are distributed on the top of the bottom plate in a mirror-image manner, and the two tensile structures are located at both ends of the stretching structure.

[0015] Preferably, a plurality of equidistantly distributed support frames are fixedly connected to the top of the support member, a connecting column is fixedly connected to the bottom middle of the plurality of equidistantly distributed support frames, and the bottom of the connecting column is fixedly connected to the adjustment structure.

[0016] Preferably, the adjustment structure includes a slide rail fixedly connected to the bottom of the connecting column, and a lead screw is rotatably connected inside the slide rail, a slide groove is arranged inside the slide rail, and an adjustment block is slidably connected inside the slide groove, and the lead screw is driven by a motor.

[0017] Preferably, a threaded hole is provided inside the adjusting block, and the adjusting block is threadedly connected inside the threaded hole, both ends of the adjusting block are fixedly connected with fixed shafts, and the outer side of the fixed shaft is rotatably connected to the rotating base block.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The food cast film production stretching and traction mechanism is provided with a stretching structure. When a certain angle is formed between the lower pressure roller and the support roller, the two lower pressure rollers will form a certain angle. When the cast film passes between the support rollers of the lower pressure roller, the two lower pressure rollers will form a certain angle. The lower pressure roller will exert force on the cast film on the top of the support roller in the direction of both sides, thereby adjusting the width of the cast film to prevent the cast film from being excessively deformed in width when being stretched, thereby improving the yield rate and production efficiency of the cast film during production.

[0020] Furthermore, when the adjusting block moves, the adjusting block drives the rotating base block to move, so that the rotating base block drives the lower pressure roller to rotate around the positioning ring, thereby adjusting the angle of the lower pressure roller. During the process of adjusting the angle of the lower pressure roller, the connecting strip will slide in the connecting groove inside the lower pressure roller. At the same time, when the motor drives the lower pressure roller to rotate, the lower pressure roller will drive the connecting strip to rotate through the connecting groove, and a universal joint structure is formed between the end of the connecting strip and the rotating base block, so that the power output of the lower pressure roller is not affected when it rotates.

[0021] Furthermore, a stretching structure is provided, and when the cast film passes between the driving roller and the mounting column, the two driving rollers drive the conveyor belt to rotate outside the two driving rollers, so that the cast film is transported on the conveyor belt. When the cast film passes between the driving roller and the stretching roller at the same time, the rotation speed of the two driving rollers is adjusted so that the two conveyor belts move asynchronously, so that the discharge speed of the cast film is greater than the feeding speed of the cast film, thereby realizing the stretching operation of the cast film when it moves on the top of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the conveyor belt of the utility model;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the bottom plate of the utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the slide rail of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the lower pressure roller of the utility model;

[0027] Figure 6 This is a schematic diagram of the positioning ring structure of the utility model.

[0028] In the figure: 1. bottom plate; 2. support member; 3. mounting strip; 4. mounting column; 5. driving roller; 6. stretching roller; 7. conveyor belt; 8. supporting frame; 9. connecting column; 10. slide rail; 11. screw rod; 12. adjusting block; 13. fixed shaft; 14. rotating base block; 15. connecting strip; 16. positioning ring; 17. lower pressure roller; 18. connecting groove; 19. supporting roller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In a further preferred embodiment of the present invention, Figure 1 - Figure 6 As shown, two support members 2 are provided, and the two support members 2 are symmetrically fixedly connected to the two sides of the outside of the bottom plate 1, and two mounting bars 3 are provided, and the two mounting bars 3 are symmetrically fixedly connected to the two sides of the top of the bottom plate 1;

[0031] The inner side of the mounting bar 3 is provided with a stretching structure for stretching the cast film, the stretching structure includes a lower pressure roller 17, and a connecting groove 18 is provided inside the inner end of the lower pressure roller 17, and a connecting bar 15 is slidably connected inside the connecting groove 18, the end of the connecting bar 15 away from the lower pressure roller 17 is rotatably connected to a rotating base block 14, and a cross shaft is provided at the connection between the rotating base block 14 and the connecting bar 15, and the rotating base block 14, the connecting bar 15 and the cross shaft form a universal joint, the end of the lower pressure roller 17 away from the connecting bar 15 is rotatably connected to a positioning ring 16, and the lower end of the positioning ring 16 is rotatably connected to the inside of the mounting bar 3;

[0032] Six stretching structures are arranged inside the two mounting strips 3, and every two stretching structures are set as a group, and three groups of stretching structures are arranged in equal intervals inside the mounting strips 3, and an adjustment structure for adjusting the angle of the lower pressure roller 17 is arranged between the three groups of stretching structures;

[0033] Three equally spaced support rollers 19 are fixedly connected to the inner side of the mounting bar 3, and the three equally spaced support rollers 19 are aligned with the three sets of stretching structures;

[0034] The end of the bottom plate 1 is provided with a stretching structure for stretching the length of the cast film.

[0035] The tensile structure is provided with mounting columns 4 fixedly connected to the four corners of the top of the base plate 1, and a driving roller 5 is rotatably connected between the two mounting columns 4, the driving roller 5 is also rotatably connected between the two ends of the two mounting strips 3, and a conveyor belt 7 is rotatably connected to the outer sides of the two driving rollers 5, and the driving roller 5 is driven by a motor.

[0036] The stretching structure also includes a stretching roller 6 rotatably connected between two mounting columns 4, and the stretching roller 6 and the driving roller 5 inside the mounting column 4 are vertically distributed to each other, and the stretching roller 6 is in contact with the outer side of the conveyor belt 7, and the stretching roller 6 is driven by a motor.

[0037] There are two tensile structures, and the two tensile structures are distributed on the top of the bottom plate 1 in a mirror-image manner, and the two tensile structures are located at both ends of the tensile structure.

[0038] A plurality of equally-spaced support frames 8 are fixedly connected to the top of the support member 2, and a connecting column 9 is fixedly connected to the bottom of the middle of the plurality of equally-spaced support frames 8, and the bottom of the connecting column 9 is fixedly connected to the adjustment structure.

[0039] The adjustment structure includes a slide rail 10 fixedly connected to the bottom of the connecting column 9, and a screw rod 11 is rotatably connected inside the slide rail 10. A slide groove is arranged inside the slide rail 10, and an adjustment block 12 is slidably connected inside the slide groove, and the screw rod 11 is driven by a motor.

[0040] A threaded hole is provided inside the adjusting block 12, and the adjusting block 12 is threadedly connected inside the threaded hole. Both ends of the adjusting block 12 are fixedly connected to a fixed shaft 13, and the outer side of the fixed shaft 13 is rotatably connected to the rotating base block 14;

[0041] During the stretching process of the cast film passing through the stretching structures at both ends of the bottom plate 1, the cast film will pass between the lower pressure roller 17 and the support roller 19, and the upper and lower surfaces of the cast film will be pressed by the lower pressure roller 17 and the support roller 19. At this time, the motor driving the screw rod 11 is started, so that the screw rod 11 rotates inside the slide rail 10, and the three adjustment blocks 12 are driven to slide inside the slide rail 10 through the rotation of the screw rod 11. The lower pressure roller 17 is driven to rotate around the positioning ring 16 through the movement of the adjustment block 12, thereby adjusting the lower pressure roller 17 and the support roller 19. The angle between the rollers 19 is adjusted. When a certain angle is formed between the lower pressure roller 17 and the support roller 19, the two lower pressure rollers 17 will form a certain angle. When the cast film passes between the lower pressure roller 17 and the support roller 19, the two lower pressure rollers 17 will form a certain angle. The lower pressure roller 17 will exert force on the cast film on the top of the support roller 19 in the direction of both sides, thereby adjusting the width of the cast film to prevent the cast film from being excessively deformed in width when being stretched, thereby improving the yield rate of the cast film during production.

[0042] When the adjusting block 12 moves, the adjusting block 12 drives the rotating base block 14 to move, so that the rotating base block 14 drives the lower pressure roller 17 to rotate around the positioning ring 16, so as to adjust the angle of the lower pressure roller 17. During the process of adjusting the angle of the lower pressure roller 17, the connecting strip 15 will slide in the connecting groove 18 inside the lower pressure roller 17. At the same time, when the motor drives the lower pressure roller 17 to rotate, the lower pressure roller 17 will drive the connecting strip 15 to rotate through the connecting groove 18. A universal joint structure is formed between the end of the connecting strip 15 and the rotating base block 14, so that the power output of the lower pressure roller 17 is not affected when it rotates.

[0043] When the cast film passes between the driving roller 5 and the mounting column 4, the two driving rollers 5 drive the conveyor belt 7 to rotate outside the two driving rollers 5, so that the cast film is transported on the conveyor belt 7. When the cast film passes between the driving roller 5 and the stretching roller 6 at the same time, the rotation speed of the two driving rollers 5 is adjusted so that the two conveyor belts 7 move asynchronously, so that the discharge speed of the cast film is greater than the feeding speed of the cast film, thereby achieving the stretching operation of the cast film when it moves on the top of the conveyor belt 7.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or 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 shall be included in the protection scope of the present invention.

Claims

1. A stretching and pulling mechanism for producing cast film for food, comprising a bottom plate (1), a support member (2), and a mounting bar (3), wherein two support members (2) are provided, and the two support members (2) are symmetrically fixedly connected to two sides of the outside of the bottom plate (1), and two mounting bars (3) are provided, and the two mounting bars (3) are symmetrically fixedly connected to two sides of the top of the bottom plate (1); Features: The inner side of the mounting bar (3) is provided with a stretching structure for stretching the cast film, the stretching structure comprises a lower pressure roller (17), and a connecting groove (18) is provided inside the inner end of the lower pressure roller (17), and a connecting bar (15) is slidably connected inside the connecting groove (18), the end of the connecting bar (15) away from the lower pressure roller (17) is rotatably connected to a rotating base block (14), and a cross shaft is provided at the connection between the rotating base block (14) and the connecting bar (15), and the rotating base block (14), the connecting bar (15) and the cross shaft form a universal joint, the end of the lower pressure roller (17) away from the connecting bar (15) is rotatably connected to a positioning ring (16), and the lower end of the positioning ring (16) is rotatably connected to the inside of the mounting bar (3); Six stretching structures are arranged inside the two mounting strips (3), and every two stretching structures form a group. Three groups of stretching structures are arranged in an equidistant manner inside the mounting strips (3), and an adjustment structure for adjusting the angle of the lower pressure roller (17) is arranged between the three groups of stretching structures. Three equally spaced support rollers (19) are fixedly connected to the inner side of the mounting bar (3), and the three equally spaced support rollers (19) are aligned with the three groups of stretching structures; The end of the bottom plate (1) is provided with a stretching structure for stretching the length of the cast film.

2. A stretching and pulling mechanism for producing food cast film according to claim 1, characterized in that: The stretching structure is provided with mounting columns (4) fixedly connected to the four corners of the top of the bottom plate (1), and a driving roller (5) is rotatably connected between the two mounting columns (4), and the driving roller (5) is also rotatably connected between the two ends of the two mounting strips (3), and a conveyor belt (7) is rotatably connected to the outer sides of the two driving rollers (5), and the driving roller (5) is driven by a motor.

3. A stretching and pulling mechanism for producing food cast film according to claim 2, characterized in that: The stretching structure also includes a stretching roller (6) rotatably connected between the two mounting columns (4), and the stretching roller (6) and the driving roller (5) inside the mounting columns (4) are vertically distributed, and the stretching roller (6) and the outer side of the conveyor belt (7) are in contact with each other, and the stretching roller (6) is driven by a motor.

4. A stretching and pulling mechanism for producing food cast film according to claim 3, characterized in that: The two tensile structures are provided with two, and the two tensile structures are distributed on the top of the bottom plate (1) in a mirror-like manner, and the two tensile structures are located at both ends of the stretching structure.

5. A stretching and pulling mechanism for producing food cast film according to claim 4, characterized in that: The top of the support member (2) is fixedly connected to a plurality of equidistantly distributed support frames (8), and the middle bottom of the plurality of equidistantly distributed support frames (8) is fixedly connected to a connecting column (9), and the bottom of the connecting column (9) is fixedly connected to the adjustment structure.

6. A stretching and pulling mechanism for producing food cast film according to claim 5, characterized in that: The adjustment structure comprises a slide rail (10) fixedly connected to the bottom of the connecting column (9), and a screw rod (11) is rotatably connected inside the slide rail (10), a slide groove is arranged inside the slide rail (10), and an adjustment block (12) is slidably connected inside the slide groove, and the screw rod (11) is driven by a motor.

7. A stretching and pulling mechanism for producing food cast film according to claim 6, characterized in that: The adjusting block (12) is provided with a threaded hole inside, and the adjusting block (12) is threadedly connected inside the threaded hole. Both ends of the adjusting block (12) are fixedly connected to a fixed shaft (13), and the outer side of the fixed shaft (13) is rotatably connected to a rotating base block (14).

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