Packaging bag transverse sealing and cutting mechanism for food packaging machine

Abstract

The utility model discloses a packaging bag transverse sealing and cutting mechanism for a food packaging machine, and belongs to the technical field of packaging machines. A packaging bag transverse sealing and cutting mechanism for a food packaging machine comprises a rack, a lifting unit, a translation unit and a transverse cutting unit, the transverse cutting unit comprises an upper tool apron which reciprocates in the vertical direction, exhaust units used for extruding packaging bags are fixedly arranged on the upper tool apron, and the exhaust units are located above the two sides of the upper tool apron; the utility model has the advantages that the structure is simple, the layout is more reasonable, and the air in the packaging bag can be better exhausted.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machines, in particular to a transverse sealing and cutting mechanism for packaging bags of a food packaging machine. Background Art

[0002] The pillow type packaging machine is a continuous packaging machine with very strong packaging ability and suitable for various specifications for food and non-food packaging. It can not only be used for packaging of trademarkless packaging materials, but also be able to use the pre-printed roll materials with trademark patterns for high-speed packaging. It is the newest automatic continuous shrink packaging equipment in China. It adopts the ordinary electric furnace wire heating method, with the characteristics of fast upper temperature, good stability, low maintenance cost, etc. The shrinkage temperature and the motor driving speed are stably adjustable, and the adjustment range is wide; the original drum self-rotation device can work continuously. Therefore, the heat shrinkage machine has the characteristics of advanced design, stable and reliable performance, power saving and high efficiency, good shrinkage effect, novel and beautiful structure, convenient operation and maintenance, etc. It can be applicable to the shrink packaging of any shrink film, with better performance and packaging effect than the previous shrinkage machines, and can be used with confidence.

[0003] The transverse sealing and cutting mechanism is the core part of the pillow type packaging machine, and its main function is to press, heat with hot air and cut the port of the packaging bag along the transverse direction. The pillow type packaging machine has a wide range of applications. When used for food industry packaging, in addition to packaging common food packages without any filling and packages that need to be filled with nitrogen, there is also a kind of food packaging with an inner lining (such as biscuit packaging, usually putting biscuits in a plastic inner lining and then loading them into the packaging bag). For this kind of packaging with an inner lining, when heat-sealing and packaging, the air in the bag is often discharged, so that the whole packaging bag presents a cuboid, cube or other structures similar to the shape and contour of the inner lining, avoiding the phenomenon of bulging (such as potato chip packaging bags), so as to reduce the packaging volume and improve the packaging aesthetics at the same time.

[0004] However, the exhaust mechanism on the existing pillow type packaging machine has a complex structure and general exhaust effect. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems of complex exhaust structure and general exhaust effect on the existing pillow type packaging machine, and to provide a transverse sealing and cutting mechanism for packaging bags of a food packaging machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A transverse sealing and cutting mechanism for packaging bags of a food packaging machine includes a frame, a lifting unit, a translation unit, and a transverse cutting unit. The transverse cutting unit includes an upper knife seat reciprocating in the vertical direction, and an exhaust unit for extruding the packaging bag is fixedly arranged on the upper knife seat, and the exhaust unit is located at the positions above both sides of the upper knife seat.

[0008] Further, the exhaust unit includes a front exhaust seat, a rear exhaust seat, and a fixing frame. The fixing frame is mounted on the upper knife seat, and the front exhaust seat and the rear exhaust seat are movably mounted on the bottom of the fixing frame along the vertical direction through mounting rods.

[0009] Further, the front exhaust seat includes a front mounting plate and a front pressing block mounted on one side of the inlet of the upper knife seat. The front mounting plate is mounted on the bottom of the fixing frame, and the front pressing block is mounted on the bottom of the front mounting plate. An exhaust groove corresponding to the packaging bag is formed along the conveying direction at the bottom of the front pressing block.

[0010] Further, the exhaust groove includes a contour half groove whose shape corresponds to half of the inner liner, and an opening is provided on one side of the contour half groove away from the upper knife seat.

[0011] Further, the rear exhaust seat includes a rear mounting plate and a rear pressing block mounted on one side of the outlet of the upper knife seat. The rear mounting plate is mounted on the bottom of the fixing frame, and the rear pressing block is mounted on the bottom of the rear mounting plate. The length of the rear pressing block corresponds to the length of the packaging bag.

[0012] Further, the exhaust groove includes a contour full groove whose shape corresponds to the whole inner liner, and an opening is provided on one side of the contour full groove close to the upper knife seat.

[0013] Further, the height of the top surface of the contour full groove is lower than the height of the hot pressing block in the upper knife seat.

[0014] Further, the lifting unit includes a first operating table, a guide rod, and a lift. The first operating table is fixedly mounted on the frame. A lift is arranged in the middle of the first operating table, and guide rods are arranged around the lift. The translation unit is fixedly mounted on the lift and is slidably connected to the guide rod.

[0015] Further, the translation unit includes a second operating table, a guide rail, and a third operating table. The cross-cutting unit is fixedly mounted on the second operating table. The second operating table is fixedly mounted on the top of the lift and is slidably connected to the guide rod. A guide rail is arranged along the conveying direction on the second operating table. The third operating table is slidably mounted on the guide rail through a sliding seat, and a reciprocating driving structure is arranged on one side of the third operating table.

[0016] Further, the reciprocating driving structure includes a translation motor, a rotating disc, and a connecting rod. The translation motor is connected to the third operating table through the rotating disc and the connecting rod. The rotating disc is connected to the working end of the translation motor. A plurality of eccentric holes with different distances from the center position are formed at the eccentric position of the rotating disc. Two ends of the connecting rod are respectively hinged to the eccentric hole and the third operating table.

[0017] Compared with the prior art, the utility model provides a transverse sealing and cutting mechanism for packaging bags of a food packaging machine, which has the following beneficial effects:

[0018] When in use, for the transverse sealing and cutting mechanism for packaging bags of a food packaging machine of the utility model, after the packaging bag, the material and the inner lining enter the transverse sealing and cutting mechanism together, while the upper knife seat and the lower knife seat cooperate to perform hot air sealing and cutting on the packaging bag, the upper knife seat drives the exhaust unit to extrude the packaging bag, squeezing out the air in the packaging bag, so that the packaging bag fits the inner lining. Compared with the prior art, the structure is simple and more reasonable, and can better discharge the air in the packaging bag.

[0019] Other advantages, objectives and features of the utility model will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 is a schematic diagram of the lifting unit structure of the utility model;

[0022] Figure 3 is a schematic diagram of the translation unit structure of the utility model;

[0023] Figure 4 is a schematic diagram of the rotating disc structure of the utility model;

[0024] Figure 5 is a schematic diagram of the cross-cutting unit structure of the utility model;

[0025] Figure 6 is a schematic diagram of the exhaust unit structure of the utility model;

[0026] Figure 7 is a schematic diagram of the exhaust passage structure of the utility model;

[0027] Figure 8 is a schematic diagram of the contour finishing groove structure of the utility model;

[0028] In the figure:

[0029] 1. Frame; 2. Lifting unit; 201. First operating table; 202. Guide rod; 203. Lift; 204. Handwheel; 3. Translation unit; 301. Second operating table; 302. Guide rail; 3021. Slide block; 303. Third operating table; 304. Translation motor; 305. Rotating disc; 306. Connecting rod; 307. Eccentric hole; 4. Cross-cutting unit; 401. Upper knife holder; 5. Exhaust unit; 501. Front exhaust seat; 502. Rear exhaust seat; 503. Fixed frame; 5031. Mounting rod; 504. Front mounting plate; 505. Front pressing block; 506. Rear mounting plate; 507. Rear pressing block; 508. Exhaust groove; 509. Contour half groove; 510. Contour full groove. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Refer to Figure 1-8 , a cross-sealing and cutting mechanism for packaging bags of a food packaging machine of the present invention includes a frame 1, a lifting unit 2, a translation unit 3, and a cross-cutting unit 4. The cross-cutting unit 4 includes an upper knife holder 401 that reciprocates in the vertical direction. An exhaust unit 5 for squeezing the packaging bag is fixedly arranged on the upper knife holder 401. The exhaust unit 5 is located above both sides of the upper knife holder 401.

[0032] A lifting unit 2 is installed on the frame 1, a translation unit 3 is installed on the lifting unit 2, and a cross-cutting unit 4 is installed on the translation unit 3. The cross-cutting unit 4 includes an upper knife holder 401 and a lower knife holder. During use, the packaging bag passes through between the upper knife holder 401 and the lower knife holder together with the inner liner and the material. Heat pressing blocks and cutting knives are installed on both the upper knife holder 401 and the lower knife holder. When the upper knife holder 401 and the lower knife holder bite, the heat pressing blocks heat and tightly seal the packaging bag, and the cutting knife makes a cross cut at the sealing position, so as to form a cross-cut incision between the previous packaging bag and the next packaging bag.

[0033] The upper knife holder 401 and the lower knife holder perform reciprocating biting and opening actions. Each time the upper knife holder 401 moves downward to bite with the lower knife holder, it simultaneously drives the exhaust unit 5 to press down on the packaging bag from above the packaging bag, thereby squeezing out the air inside. The structure is simple and convenient to use.

[0034] Specifically, the exhaust unit 5 includes a front exhaust seat 501, a rear exhaust seat 502, and a fixing bracket 503. The fixing bracket 503 is installed on the upper knife seat 401. The front exhaust seat 501 and the rear exhaust seat 502 are movably installed at the bottom of the fixing bracket 503 along the vertical direction through an installation rod 5031. Among them, the front exhaust seat 501 is installed on the inlet side of the upper knife seat 401 and is used to pre-extrude and discharge a part of the air in the packaging bag after the first sealing of the packaging bag. The rear exhaust seat 502 is installed on the outlet side of the upper knife seat 401 and is used to extrude and discharge most of the air in the packaging bag before the second sealing of the packaging bag.

[0035] The front exhaust seat 501 includes a front mounting plate 504 and a front pressing block 505 installed on the inlet side of the upper knife seat 401. The front mounting plate 504 is installed at the bottom of the fixing bracket 503, and the front pressing block 505 is installed at the bottom of the front mounting plate 504. An exhaust groove 508 corresponding to the packaging bag is formed along the conveying direction at the bottom of the front pressing block 505.

[0036] In this application, the front pressing block 505 and the rear pressing block 507 can be made of a soft conveying material, such as sponge, or a hard material with a smooth surface, as long as it can avoid puncturing the packaging bag. The shapes of the front pressing block 505 and the rear pressing block 507 can be a common cuboid shape, as Figure 5 shown.

[0037] The shape of the exhaust groove 508 can penetrate through the front pressing block 505 and the rear pressing block 507 to form a groove in the shape of a cuboid, which is mainly applied to the inner lining packaging in the shape of a cuboid. The width of the groove in the shape of a cuboid corresponds to the width of the inner lining, as Figures 6-7 shown.

[0038] Alternatively, for non-cuboid-shaped inner linings, such as circular, polygonal, or other regular-shaped inner linings, the exhaust groove 508 includes a contour half-groove 509 whose shape corresponds to the outer contour of half of the inner lining. An opening is provided on the side of the contour half-groove 509 away from the upper knife seat 401, as Figure 8 shown. The front pressing block 505 pre-extrudes and discharges the air at the position between the inner lining in the packaging bag and the upper knife seat 401 once, so that the air is discharged to the inlet end side in the conveying direction of the packaging machine.

[0039] The rear exhaust seat 502 includes a rear mounting plate 506 and a rear pressing block 507 installed on the outlet side of the upper knife seat 401. The rear mounting plate 506 is installed at the bottom of the fixing bracket 503, and the rear pressing block 507 is installed at the bottom of the rear mounting plate 506. The length of the rear pressing block 507 corresponds to the length of the packaging bag, so that the rear pressing block 507 can completely cover the top surface of the packaging bag in terms of length and width, and squeeze out most of the air in the packaging bag.

[0040] For the inner liner with a non - cuboid shape, the exhaust groove 508 includes a contour - shaping groove 510 whose shape corresponds to the outer contour of the whole inner liner. An opening is provided on one side of the contour - shaping groove 510 close to the upper knife seat 401. When the rear pressing block 507 presses on the packaging bag, the inner liner and the material are located within the contour - shaping groove 510, and the air in the packaging bag is discharged from the opening.

[0041] The height of the top surface of the contour - shaping groove 510 is lower than the height of the hot - pressing block within the upper knife seat 401. Specifically, the upper knife seat 401 is located between the front exhaust seat 501 and the rear exhaust seat 502. The height of the top surface of the contour - shaping groove 510 is slightly lower than the height of the hot - pressing block within the upper knife seat 401. At the same time, the height of the hot - pressing block within the upper knife seat 401 is slightly higher than the height of the top surface of the semi - contour groove 509. Thus, before the hot - pressing blocks within the upper knife seat 401 and the lower knife seat are pressed together each time, the contour - shaping groove 510 contacts the packaging bag first, squeezes the packaging bag, and expels the air. Then, the two hot - pressing blocks perform secondary hot - pressing and transverse sealing on the packaging bag. When the two hot - pressing blocks perform secondary hot - pressing and transverse sealing on the previous packaging bag, it is also the first hot - pressing and transverse sealing on the next packaging bag. For the next packaging bag, after the first hot - pressing and transverse sealing is completed, the semi - contour groove 509 squeezes the next packaging bag to expel the air. The layout is more reasonable and the exhaust effect is better.

[0042] The lifting unit 2 includes a first operating platform 201, a guide rod 202, and a lifter 203. The first operating platform 201 is fixedly installed on the frame 1. A lifter 203 is installed in the middle of the first operating platform 201. The lifter 203 is a screw - type lifter. Guide rods 202 are installed around the lifter 203. The translation unit 3 is fixedly installed on the lifter 203. The translation unit 3 is slidably connected to the guide rod 202. The input end of the lifter 203 can be connected to a handwheel 204 or to a motor, and can be manually driven or electrically driven. During use, the lifter 203 is driven to drive the translation unit 3 to lift and lower, and the translation unit 3 slides vertically along the guide rod 202.

[0043] The translation unit 3 includes a second operating platform 301, a guide rail 302, and a third operating platform 303. The cross - cutting unit 4 is fixedly installed on the second operating platform 301. The second operating platform 301 is fixedly installed on the top of the lifter 203. The second operating platform 301 is slidably connected to the guide rod 202, and the guide rod 202 prevents the second operating platform 301 from rotating. The second operating platform 301 moves vertically under the guiding action of the guide rod 202. A guide rail 302 is installed on the second operating platform 301 along the conveying direction. The third operating platform 303 is slidably installed on the guide rail 302 through a sliding seat 3021. A reciprocating driving structure is provided on one side of the third operating platform 303. The reciprocating driving structure drives the translation unit 3 and the cross - cutting unit 4 to perform reciprocating motion in the conveying direction, so that the cross - cutting unit 4 remains relatively stationary with respect to the packaging bag during hot - pressing and transverse sealing.

[0044] The reciprocating drive structure includes a translation motor 304, a rotating disk 305, and a connecting rod 306. The translation motor 304 is connected to the third operation table 303 through the rotating disk 305 and the connecting rod 306. The rotating disk 305 is connected to the working end of the translation motor 304. A plurality of eccentric holes 307 with different distances from the center of the circle are provided at the eccentric positions of the rotating disk 305. The two ends of the connecting rod 306 are respectively hinged to the eccentric holes 307 and the third operation table 303. The rotating disk 305, the connecting rod 306, and the eccentric holes 307 form an eccentric wheel structure. When the translation motor 304 rotates, it drives the rotating disk 305 to rotate, and the rotating disk 305 drives the third operation table 303 to reciprocate on the guide rail 302 through the connecting rod 306.

[0045] Since the translation distances of the translation unit 3 and the cross-cutting unit 4 are different when packaging different products, compared with the traditional method of adjusting the translation distance by replacing different rotating disks 305, in this application, by connecting the connecting rod 306 to the eccentric holes 307 at different positions, the translation distances of the translation unit 3 and the cross-cutting unit 4 are adjusted, with a simple structure and convenient adjustment.

[0046] Working principle: During use, the height of the translation unit 3 and the cross-cutting unit 4 is adjusted by the lifting unit 2. The translation unit 3 drives the cross-cutting unit 4 to reciprocate along the conveying direction. Before the upper knife holder 401 engages with the lower knife holder to perform hot air cross-cutting on the package, the rear exhaust seat 502 first squeezes the previous packaging bag to discharge the air inside the previous packaging bag. Then, the upper knife holder 401 engages with the lower knife holder to perform hot air cross-cutting on the packaging bag. Finally, the front exhaust seat 501 pre-squeezes the next packaging bag to discharge part of the air, and the cycle action is used to discharge the air inside the packaging bag.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0048] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A packaging bag transverse sealing and cutting mechanism for a food packaging machine, comprising a frame (1), a lifting unit (2), a translation unit (3), and a transverse cutting unit (4), wherein the transverse cutting unit (4) comprises an upper knife seat (401) which reciprocates in a vertical direction, and is characterized in that: An exhaust unit (5) for squeezing the packaging bag is fixedly arranged on the upper knife seat (401), and the exhaust unit (5) is located above both sides of the upper knife seat (401).

2. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 1, characterized in that: The exhaust unit (5) comprises a front exhaust seat (501), a rear exhaust seat (502) and a fixing frame (503); the fixing frame (503) is mounted on the upper knife seat (401); the front exhaust seat (501) and the rear exhaust seat (502) are mounted on the bottom of the fixing frame (503) in a vertically movably manner via a mounting rod (5031).

3. The transverse sealing and cutting mechanism for packaging bags for a food packaging machine according to claim 2, characterized in that: The front exhaust seat (501) comprises a front mounting plate (504) and a front pressing block (505) mounted on the inlet side of the upper knife seat (401); the front mounting plate (504) is mounted on the bottom of the fixing frame (503); the front pressing block (505) is mounted on the bottom of the front mounting plate (504); and an exhaust groove (508) corresponding to the packaging bag is provided at the bottom of the front pressing block (505) along the conveying direction.

4. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 3, characterized in that: The exhaust groove (508) comprises a half groove (509) having a shape corresponding to half of the inner liner, and an opening is provided on a side of the half groove (509) away from the upper tool seat (401).

5. The transverse sealing and cutting mechanism for packaging bags for a food packaging machine according to claim 3, characterized in that: The rear exhaust seat (502) comprises a rear mounting plate (506) and a rear pressing block (507) mounted on one side of the outlet of the upper knife seat (401); the rear mounting plate (506) is mounted on the bottom of the fixing frame (503); the rear pressing block (507) is mounted on the bottom of the rear mounting plate (506); and the length of the rear pressing block (507) corresponds to the length of the packaging bag.

6. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 5, characterized in that: The exhaust groove (508) comprises a contoured groove (510) having a shape corresponding to the entire liner, and an opening is provided on a side of the contoured groove (510) close to the upper tool holder (401).

7. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 6, characterized in that: The height of the top surface of the contour-forming groove (510) is lower than the height of the hot pressing block in the upper tool holder (401).

8. The transverse sealing and cutting mechanism for packaging bags for a food packaging machine according to claim 3, characterized in that: The lifting unit (2) comprises a first operating platform (201), a guide rod (202), and an elevator (203); the first operating platform (201) is fixedly mounted on the frame (1); the elevator (203) is arranged in the middle of the first operating platform (201); the guide rods (202) are arranged around the elevator (203); the translation unit (3) is fixedly mounted on the elevator (203); and the translation unit (3) is slidably connected to the guide rod (202).

9. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 8, characterized in that: The translation unit (3) comprises a second operating platform (301), a guide rail (302), and a third operating platform (303); the cross-cutting unit (4) is fixedly mounted on the second operating platform (301); the second operating platform (301) is fixedly mounted on the top of the elevator (203); the second operating platform (301) is slidably connected to the guide rod (202); the second operating platform (301) is provided with a guide rail (302) along a conveying direction; the third operating platform (303) is slidably mounted on the guide rail (302) via a slide seat (3021); and a reciprocating drive structure is provided on one side of the third operating platform (303).

10. A packaging bag transverse sealing and cutting mechanism for a food packaging machine according to claim 9, characterized in that: The reciprocating drive structure comprises a translation motor (304), a rotating disc (305), and a connecting rod (306); the translation motor (304) and the third operating platform (303) are connected via the rotating disc (305) and the connecting rod (306); the rotating disc (305) is connected to the working end of the translation motor (304); a plurality of eccentric holes (307) at different distances from the center of the circle are provided at an eccentric position of the rotating disc (305); and two ends of the connecting rod (306) are respectively hinged to the eccentric holes (307) and the third operating platform (303).

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