Film hot-pressing device for food packaging machine

Abstract

The utility model discloses a thin film hot-pressing device for a food packaging machine, and belongs to the technical field of food packaging machines. A thin film hot-pressing device for a food packaging machine comprises a clamping mechanism and a heating mechanism arranged in the middle of the clamping mechanism, the heating mechanism comprises two heating blocks arranged side by side, and the heating mechanism further comprises a heating base and a driving box. The heating block is movably installed on the driving box through the heating base in the direction perpendicular to the packaging machine conveying line. The device has the advantages that the distance between the heating blocks can be adjusted instead of manual work, and the distance between the heating blocks and the middle edge can be observed conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging machines, in particular to a film hot pressing device for 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 can 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, which is characterized by fast heating of the 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 unique 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 applied 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 pillow type packaging machine mainly includes five major parts, namely a conveying mechanism, a film unwinding mechanism, a middle sealing mechanism, a transverse cutting mechanism and a central control mechanism. Materials enter the equipment from the conveying mechanism, and the film unwinding mechanism releases the film from above or below the conveying mechanism. After being shaped by a shaper, the film forms a tubular packaging film, which cooperates with the conveying mechanism to wrap the materials inside the packaging film. After being hot pressed by the middle sealing mechanism to form a middle edge, finally the transverse cutting mechanism completes the hot pressing + transverse cutting action on the packaging film at one time, so as to package the materials in independent packaging bags.

[0004] At present, the middle sealing mechanisms of the existing pillow type packaging machines are mainly divided into two types according to the installation positions. One is that the film unwinding mechanism is located above the conveying mechanism, and the middle sealing mechanism is located below the conveying mechanism (embedded inside the conveying platform), and the middle edge is hot pressed from below the packaging film. The other is that the film unwinding mechanism is located below the conveying mechanism, and the middle sealing mechanism is located above the conveying mechanism, and the middle edge is hot pressed from above the packaging film. No matter which middle sealing mechanism is used, during the use process, due to operations such as material change and film change, problems such as insecure and uneven edge pressing of the hot pressing device in the middle sealing mechanism often occur. The main solution is to readjust the distance between the two heating blocks so that the film can be kept flat and wrinkle-free when entering and exiting between the two heating blocks.

[0005] However, based on the installation positions of the above two center-sealing mechanisms, each time the heating blocks of the center-sealing mechanism installed below the conveying mechanism are debugged, it is necessary to first open the conveying flat plate located at the top of the center-sealing mechanism, and then manually adjust the distance between the two heating blocks to a suitable position (when adjusting the center-sealing mechanism above the conveying mechanism, it is not necessary to remove the conveying flat plate, but still need to manually adjust the distance between the two heating blocks). The adjustment is very inconvenient. First, the internal operation space of the conveying flat plate is limited. Second, blocked by the packaging film, it is not easy to observe the relative positions between the middle edge of the packaging film and the two heating blocks. Summary of the Utility Model

[0006] The purpose of the present utility model is to solve the problem that it is very inconvenient to adjust the positions of the heating blocks of the hot pressing device in the center-sealing mechanism of a pillow-type packaging machine for food processing, and to propose a film hot pressing device for a food packaging machine.

[0007] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0008] A film hot pressing device for a food packaging machine, including a clamping mechanism and a heating mechanism arranged in the middle of the clamping mechanism. The heating mechanism includes two heating blocks arranged side by side. The heating mechanism further includes a heating base and a driving box. The heating blocks are movably installed on the driving box through the heating base in a direction perpendicular to the conveying line of the packaging machine.

[0009] Further, a guide shaft is arranged inside the driving box. A guide seat is slidably arranged on the guide shaft. The heating base is fixedly installed on the guide seat. The guide seat is connected to the driving structure.

[0010] Further, the driving structure includes a bidirectional lead screw threadedly connected to the two guide seats. The bidirectional lead screw is rotatably installed inside the driving box. A driving unit is arranged at the end of the bidirectional lead screw.

[0011] Further, the driving unit includes a reduction gear set and a driving motor. The bidirectional lead screw is connected to the working end of the driving motor through the reduction gear set.

[0012] Further, the reduction gear set includes a driven gear installed at the end of the bidirectional lead screw and a driving gear installed at the working end of the driving motor. The driven gear meshes with the driving gear.

[0013] Further, a detection camera is installed inside the driving box. The detection camera is located directly below the middle of the two heating blocks and faces the heating blocks.

[0014] Further, a detection channel is opened between the two heating blocks. The detection channel penetrates downward through the heating blocks. The detection channel is located directly above the detection camera.

[0015] Compared with the prior art, the utility model provides a film hot pressing device for a food packaging machine, which has the following beneficial effects:

[0016] When the film hot pressing device for a food packaging machine of the utility model is in use, the packaging film is clamped by the clamping mechanism and passes through between two heating blocks. The middle edge is heated by the heating blocks, and the hot pressed middle edge is pressed and formed by the clamping mechanism. When the middle edge has problems such as loose or uneven pressing edges, the driving box is controlled to drive the heating seat, and the heating seat drives the two heating blocks to open to both sides. The clamping mechanism is controlled to lead out the middle edge, so that the middle edge of the packaging film entering between the two heating blocks later is aligned and does not contact the heating blocks, returning to the normal state. Compared with the prior art, there is no need to disassemble the conveying flat plate to manually adjust the distance between the two heating blocks, which is convenient to adjust and reduces the maintenance time.

[0017] 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

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model from the right front perspective in three dimensions;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model from the left front perspective in three dimensions;

[0020] Figure 3 It is a schematic diagram of the structure of the heating mechanism of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the driving box of the utility model in three dimensions;

[0022] Figure 5 It is a schematic diagram of the internal structure of the driving box of the utility model from the right side perspective;

[0023] Figure 6 It is a schematic diagram of the overall structure of the packaging machine of the utility model;

[0024] Figure 7 It is a schematic diagram of the partial structure of the packaging machine of the utility model;

[0025] Figure 8 It is of the utility model Figure 7 Enlarged schematic diagram of the structure of part A;

[0026] In the figure:

[0027] 1. Clamping mechanism; 2. Heating mechanism; 201. Heating block; 202. Heating base; 203. Driving box; 204. Guide base; 205. Guide shaft; 206. Bi-directional lead screw; 207. Driven gear; 208. Driving gear; 209. Detection camera; 210. Detection channel; 211. Driving motor; 3. Conveying mechanism; 4. Unwinding mechanism; 5. Middle sealing mechanism; 6. Cross-cutting mechanism. Specific implementation mode

[0028] 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.

[0029] Refer to Figure 1-8 , a film hot pressing device for a food packaging machine of the present invention includes a clamping mechanism 1 and a heating mechanism 2 arranged in the middle of the clamping mechanism 1. The clamping mechanism 1 is two groups of clamping wheels. The heating mechanism 2 is located between the two groups of clamping wheels. Each group has two clamping wheels. The two clamping wheels in each group are used to clamp the middle edge of the packaging film. The two groups of clamping wheels, two heating blocks, and the conveying mechanism 3 are on the same center line.

[0030] When the packaging machine is working, food materials enter above the middle sealing mechanism 3 from the conveying mechanism 3. The film on the unwinding mechanism 4 forms a set after being shaped by a shaper, and is sleeved outside the food materials from the outlet end position of the conveying mechanism 3 and enters the middle sealing mechanism 5 together with the food materials. At this time, the packaging film is an unsealed straight tube structure. The food materials and the packaging film move forward together, and the food materials are on the top of the conveying flat plate. The middle sealing mechanism is located below the conveying flat plate. There is a spaced seam along the conveying direction in the middle of the conveying flat plate. The middle edge of the packaging film enters the middle sealing mechanism from the spaced seam, first enters the clamping wheels of the previous group, is clamped by the clamping wheels of the previous group and the middle edge is conveyed into the space between the two heating blocks 201 of the heating mechanism 2. After the heating block 201 heats the middle edge, the middle edge continues to move forward, enters the clamping wheels of the latter group, and the clamping wheels of the latter group press the middle edge together and stick, and at the same time continue to convey the middle edge forward to complete the hot pressing and sealing operation of the middle edge. Then the middle edge moves upward and continues to move forward, and finally moves above the conveying flat plate.

[0031] After the hot pressing operation of the middle edge is completed, the packaging film forms a complete (the middle edges are stuck together) straight tube structure. Together with the food materials, under the conveying action of the conveyor of the cross-cutting mechanism 6, it moves under the cutter of the cross-cutting mechanism 6. After being transversely hot pressed and cut, it forms packaged food with individual packaging bags.

[0032] The heating mechanism 2 includes two heating blocks 201 installed side by side. There is a gap between the two heating blocks 201 to form a heating seam. When the middle edge of the packaging film passes through the heating seam, the two heating blocks 201 heat the middle edge from both sides. The heating mechanism 2 also includes a heating base 202 and a drive box 203. The heating blocks 201 are movably installed on the drive box 203 along the direction perpendicular to the conveying line of the packaging machine through the heating base 202. The drive box 203 drives the heating blocks 201 to move closer to or away from the middle edge along the direction perpendicular to the advancing direction of the middle edge.

[0033] During the actual operation process, when the middle edge is not sealed tightly or is not aligned, most of the cases are because the gap between the two heating blocks 201 is too small. When the middle edge enters between the two heating blocks 201 from the previous set of clamping wheels, after being slightly squeezed by the heating blocks and slightly deformed, combined with the heating effect, when the middle edge exits from between the two heating blocks and enters between the clamping wheels of the next set, the clamping wheels of the next set thermally press and stick the deformed middle edge together, resulting in the situation of not being sealed tightly or the middle edge not being aligned. The general solution is for the staff to adjust the bolts for adjusting the distance between the two heating blocks 201 by turning, and after adjusting the two heating blocks 201 to a suitable distance, eliminate the problem of not being sealed tightly or the middle edge not being aligned.

[0034] In the prior art, the heating blocks are mostly opened by bolts, and the distance between the two heating blocks is adjusted by tightening and loosening the bolts.

[0035] A guide shaft 205 is installed inside the drive box 203. The axis of the guide shaft 205 is perpendicular to the conveying direction. A guide seat 204 is slidably installed on the guide shaft 205. The heating base 202 is fixedly installed on the guide seat 204. The guide seat 204 is connected to the drive structure. The drive structure drives the guide seat 204 to slide on the guide shaft 205, driving the two heating blocks to move closer to or away from the middle edge of the packaging film.

[0036] The drive structure includes a bidirectional lead screw 206 threadedly connected to the two guide seats 204. The bidirectional lead screw 206 is machined with a right-handed thread and a left-handed thread. The right-handed thread and the left-handed thread are respectively threadedly connected to the two guide seats 204. The bidirectional lead screw 206 is rotatably installed inside the drive box 203. A drive unit is provided at the end of the bidirectional lead screw 206. When the drive unit drives the bidirectional lead screw 206 to rotate, the bidirectional lead screw 206 drives the two guide seats 204 to move in opposite directions simultaneously, moving closer to or away from each other at the same time.

[0037] The drive unit includes a reduction gear set and a drive motor 211. The bidirectional lead screw 206 is connected to the working end of the drive motor 211 through the reduction gear set. The drive motor 211 uses a servo motor. The function of the reduction gear set is not only to reduce the torque requirement for the drive motor 211, but also to ensure the precision control of the number of rotations of the bidirectional lead screw 206.

[0038] The reduction gear set includes a driven gear 207 installed at the end of the bidirectional lead screw 206 and a driving gear 208 installed at the working end of the driving motor 211. The driven gear 207 meshes with the driving gear 208. The driving gear 208 is a small gear, and the driven gear 207 is a large gear. When in use, the driving motor 211 is connected to the central control mechanism. The moving distance between the two heating blocks 201 during each adjustment is determined by parameters such as the number of rotation turns of the driving motor 211, the gear ratio of the driving gear 208 and the driven gear 207, and the pitch of the bidirectional lead screw 206.

[0039] The central control mechanism includes an operating platform. When in use, parameters are input into the driving motor 211 through the operating platform, and the captured images of the detection camera 209 are viewed through the display screen on the operating platform.

[0040] The detection camera 209 is installed inside the drive box 203. The detection camera 209 is located directly below the middle of the two heating blocks 201 and faces the heating blocks 201. The distance between the middle edge and the two heating blocks 201 is observed from below through the detection camera 209, so as to adjust to maintain an appropriate distance between the two heating blocks 201 and the middle edge.

[0041] A detection channel 210 is opened between the two heating blocks 201. The detection channel 210 penetrates downward through the heating block 201. The detection channel 210 is located directly above the detection camera 209. Generally speaking, the thickness of the heating block 201 in the vertical direction is greater than the length of the middle edge in the vertical direction. Therefore, normally, when observing the distance between the middle edge and the heating block 201 from the bottom up, it can only be observed from the heating gap. The heating gap is relatively small, which affects the observation effect. The detection channel 210 can reduce the occlusion, so that the detection camera 209 can well observe the position of the middle edge between the two heating blocks 201.

[0042] Working principle: After the middle of the packaging film passes through the middle of the clamping wheels of the previous group, it enters the gap between the two heating blocks 201. After being heated by the heating blocks 201, it enters the clamping wheels of the next group from between the two heating blocks 201, and is pressed and formed by the clamping wheels of the next group to drive the middle edge to continue to move forward.

[0043] When it is found that the middle edge is not sealed tightly or not aligned, the position between the two heating blocks 201 and the middle edge is observed through the detection camera 209. Then, parameters are input through the operation console, and the driving motor 211 is started to drive the reduction gear set to rotate. The reduction gear set drives the bidirectional lead screw 206 to rotate, and the bidirectional lead screw 206 drives the two guide seats 204 to move away from each other, further driving the two heating blocks 201 to move away from each other to an appropriate distance. After the middle edge at the middle position of the two heating blocks 201 is restored to be flat, the driving motor 211 is controlled to drive the heating blocks 201 to move closer to each other to an appropriate distance to avoid the heating blocks 201 squeezing the middle edge.

[0044] 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 and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0045] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 invention. 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.

[0046] Although the embodiments of the present invention 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 invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A film hot pressing device for a food packaging machine, comprising a clamping mechanism (1) and a heating mechanism (2) arranged in the middle of the clamping mechanism (1), wherein the heating mechanism (2) comprises two heating blocks (201) arranged side by side, characterized in that: The heating mechanism (2) further comprises a heating seat (202) and a driving box (203), and the heating block (201) is movably mounted on the driving box (203) along a direction perpendicular to a conveying line of the packaging machine via the heating seat (202).

2. A film hot pressing device for a food packaging machine according to claim 1, characterized in that: A guide shaft (205) is arranged inside the driving box (203), a guide seat (204) is slidably arranged on the guide shaft (205), the heating seat (202) is fixedly mounted on the guide seat (204), and the guide seat (204) is connected to the driving structure.

3. A film hot pressing device for a food packaging machine according to claim 2, characterized in that: The driving structure comprises a bidirectional screw rod (206) threadedly connected to two guide seats (204); the bidirectional screw rod (206) is rotatably mounted inside the driving box (203); and a driving unit is provided at the end of the bidirectional screw rod (206).

4. A film hot pressing device for a food packaging machine according to claim 3, characterized in that: The driving unit comprises a reduction gear set and a driving motor (211), and the bidirectional screw rod (206) is connected to the working end of the driving motor (211) via the reduction gear set.

5. A film hot pressing device for a food packaging machine according to claim 4, characterized in that: The reduction gear set comprises a driven gear (207) mounted on the end of a bidirectional screw rod (206) and a driving gear (208) mounted on the working end of a driving motor (211), and the driven gear (207) is meshed with the driving gear (208).

6. The film hot pressing device for a food packaging machine according to claim 1, characterized in that: A detection camera (209) is installed inside the driving box (203), and the detection camera (209) is located directly below the middle of the two heating blocks (201), and the detection camera (209) faces the heating blocks (201).

7. A film hot pressing device for a food packaging machine according to claim 6, characterized in that: A detection channel (210) is provided between the two heating blocks (201), and the detection channel (210) passes through the heating blocks (201) downwards. The detection channel (210) is located directly above the detection camera (209).

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