A shrink oven air duct outlet air regulating device and a heat shrink film packaging machine for packaging items.

Abstract

This utility model discloses a shrink oven air duct outlet regulating device and a heat shrink film packaging machine for packaging products, belonging to the field of heat shrink packaging technology. The shrink oven air duct outlet regulating device of this utility model includes a guide baffle and a sliding assembly. The guide baffle is externally connected to an air duct and has a diversion air outlet on the side facing the shrink oven channel. The sliding assembly includes a screw module. The guide baffle is suspended on the sliding assembly and slidably connected to the screw module. Through the screw module, the guide baffle is guided and driven to slide laterally, adjusting the distance between the guide baffle and the packaging product. This allows the hot airflow from the air duct to directly and vertically act on the packaging product inside the shrink oven channel, improving the appearance and consistency of the film-wrapped product while avoiding waste of heat shrink film, improving the efficiency of heat flow utilization, and achieving the effects of increased efficiency and energy saving. It solves the technical problems of insufficient shrinkage of existing heat shrink film for packaging products, which easily leads to waste of heat shrink film and increased energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink packaging technology for packaging products, and more specifically to a shrink oven air duct outlet regulating device and a heat shrink film packaging machine for packaging products. Background Technology

[0002] Heat shrink film packaging machines utilize the heat shrink film's property of shrinking when heated. First, the heat shrink film is wrapped around the outside of the packaged product. Then, a conveyor chain transports the packaged product to a shrink oven for heating, causing the heat shrink film to tightly wrap around the product. Heat shrink film packaging fully showcases the characteristics of the packaged product. This method is highly flexible and economical, and can be tailored to the size, shape, and quantity of packaged items. The shrink oven uses a hot air circulation process for heating during heat shrink packaging. A centrifugal fan draws in hot air from the heat shrink duct through a return air inlet. The airflow is then accelerated and heated, guided and distributed by guide ducts and baffles, entering the heat shrink channel of the packaged product for heat shrink packaging. Finally, the airflow is drawn back in by the fan, achieving airflow circulation in the heat shrink packaging process.

[0003] The quality of shrink wrapping depends on the shrinkage effect of the heat shrink film in the shrink oven, and the airflow direction within the oven has a significant impact on this effect. The airflow, blown tangentially along the circumference of the centrifugal fan, changes direction after passing through the internal structure of the air duct. When it reaches the surface of the product to be packaged, guided by baffles on both sides of the duct, the streamline direction of the airflow should form an angle close to 90° with the surface of the packaged product. Furthermore, the shrinkage conditions differ for different package sizes. Therefore, to achieve good shrinkage results for different package types, the airflow from the shrink oven must be controllable according to the package size.

[0004] Existing shrink tunnels have baffles along the product conveying direction within the tunnel. These baffles have multiple evenly distributed small split air outlets to uniformly disperse the hot airflow. The airflow blowing into the shrink tunnel through these small split air outlets is in a free-flowing state. However, due to the constraint of the return air outlet's location, in areas far from the return air outlet, the airflow direction blowing onto the packaged products follows the line connecting the split air outlet and the return air outlet. This uneven distribution of hot airflow throughout the shrink tunnel results in insufficient shrinkage of the heat-shrink film, severely affecting the packaging's aesthetics and sealing. Repackaging then leads to wasted heat-shrink film. To ensure all packaged products meet basic shrinkage requirements, it is often necessary to increase fan power, oven temperature, or heating time, increasing unnecessary energy consumption and failing to meet the demands of modern, high-efficiency, and energy-saving production. Utility Model Content

[0005] Technical problem to be solved by the utility model

[0006] To address the problem that existing heat shrink film for packaged products does not shrink sufficiently, which easily leads to waste of heat shrink film and increased energy consumption, this utility model provides a shrink oven air duct outlet regulating device and a heat shrink film packaging machine for packaged products. The hot airflow acts directly and vertically on the packaged products in the shrink oven channel, avoiding waste of heat shrink film, improving the efficiency of heat flow utilization, and achieving the goals of increasing efficiency and saving energy and protecting the environment.

[0007] Technical solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] A shrink-wrap oven duct air outlet regulating device includes a guide baffle and a sliding assembly. The guide baffle is externally connected to an air duct and has a diversion air outlet on the side facing the shrink-wrap oven channel. The sliding assembly includes a screw module. The guide baffle is suspended on the sliding assembly and slidably connected to the screw module. The screw module guides and drives the guide baffle to slide laterally, adjusting the distance between the guide baffle and the packaged product. This allows the hot airflow from the air duct to directly and vertically act on the packaged product inside the shrink-wrap oven channel. It is adjustable and convenient, improves the appearance and consistency of the film-wrapped product, avoids waste of heat shrink film, improves the efficiency of heat flow, and achieves the effects of efficiency enhancement, energy saving, and environmental protection.

[0010] A further shrink furnace air duct outlet regulating device includes a sliding assembly comprising a frame, mounting plate, mounting block, mounting seat, and crossbeam; a screw module comprising a bearing seat, screw, and screw nut; the frame and crossbeam are fixedly connected to the inlet and outlet ends of the shrink furnace channel; the mounting plate is fixedly connected to the inner side of the frame, and the bearing seat is fixedly connected to the mounting plate; the inner end of the screw is rotatably connected to the bearing seat, and the outer end extends to the outer side of the frame, and the screw nut is rotatably connected to the screw; the upper and lower parts of the mounting block are fixedly connected to the screw nut and the connecting seat, respectively; the connecting seat is fixedly connected to the mounting seat; the mounting seat is fixedly connected to the guide baffle; the mounting seat is slidably connected to the crossbeam; rotating the screw causes the screw nut to move linearly along the screw, which is transmitted to the guide baffle sequentially through the mounting block, connecting seat, and mounting seat, causing the guide baffle to slide laterally along the surface of the crossbeam, and the lower part of the guide baffle moves laterally within the shrink furnace channel, thereby adjusting the distance between the guide baffle and the packaged product to adapt to the shrinkage requirements of the packaged product within the shrink furnace channel.

[0011] The further shrink furnace air duct outlet regulating device has a mounting base with a roller fixedly connected to it. The roller and the crossbeam roll together, making the screw rotation operation easier.

[0012] The further shrink furnace air duct outlet regulating device, the screw module also includes a guide rod, the guide rod passes through the screw nut and its two ends are fixedly connected to the bearing seat and the frame respectively, the screw nut is slidably connected to the guide rod body, guiding the screw nut to move in a directional linear motion.

[0013] The further shrink oven air duct outlet regulating device also includes a flow guiding component; the flow guiding component includes a flow guiding regulating plate and a regulating air outlet opened on the flow guiding regulating plate; the flow guiding regulating plate is hinged to the air outlet surface of the flow guiding baffle. When the flow guiding regulating plate rotates, it drives the various regulating air outlets and the corresponding branch air outlets to be misaligned and adjusted, so as to adjust the air volume and wind speed of the branch air outlets, so that the hot airflow is more vertically concentrated on the packaging and the heat loss is reduced.

[0014] Further, the shrink furnace air duct outlet air adjustment device has an adjustment hole at the end of the flow guide adjustment plate. A limit block is hinged in the adjustment hole by a pin. Through the cooperation of the adjustment hole and the limit block, the misalignment and excessive adjustment of the adjustment air outlet and the corresponding diversion air outlet are avoided.

[0015] Further, the shrink furnace air duct outlet air regulating device has a fan-shaped regulating hole. The end of the limiting block adjusts the up and down movement of the guide regulating plate within the fan-shaped range to quantify the misalignment adjustment, making the adjustment within the fan-shaped range more precise.

[0016] A heat shrink film packaging machine for packaging materials is equipped with the aforementioned air outlet regulating device for the shrink oven duct.

[0017] Beneficial effects

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0019] This utility model's shrink oven air duct outlet regulating device can actively guide and rectify the airflow flowing through the diversion outlet, solving the core defects of existing shrink ovens such as non-vertical and uneven airflow. At the same time, this structure and air outlet method allow the hot airflow to act directly and vertically on the packaged products in the shrink oven channel. It has adjustable convenience, improves the appearance and consistency of the film-wrapped products, and also improves the utilization rate of hot airflow, achieving the effect of increasing efficiency and saving energy, reducing heat shrink film waste, and being environmentally friendly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the air outlet regulating device for the shrink furnace air duct in a specific embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of the partial cross-sectional structure along the AA direction (the front and rear halves are symmetrical, the rear half is omitted).

[0022] Figure 3 This is an isometric view of a heat shrink film packaging machine for a specific embodiment.

[0023] Figure 4 This is an isometric view of the air outlet regulating device of the shrink furnace air duct in a specific embodiment;

[0024] Figure 5 This is a partially enlarged structural diagram of the sliding component in a specific embodiment;

[0025] Figure 6 This is a partially enlarged structural diagram of the sliding component in a specific embodiment;

[0026] Figure 7 This is a partially enlarged structural diagram of the flow guiding component in a specific embodiment;

[0027] Figure 8 for Figure 3 A magnified structural diagram of part B;

[0028] Figure 9 for Figure 8 A magnified schematic diagram of the structure.

[0029] In the diagram: 1-Flow guiding assembly; 11-Flow guiding baffle; 12-Flow guiding adjustment plate; 13-Limit block; 111-Diverter outlet; 121-Adjustable outlet; 122-Adjusting hole; 14-Pin shaft;

[0030] 2-Sliding assembly; 20-Mounting base; 21-Frame; 22-Connecting base; 23-Mounting plate; 24-Bearing housing; 25-Lead screw; 26-Lead screw nut; 27-Mounting block; 28-Guide rod; 29-Crossbeam; 201-Roller; 251-Adjusting head;

[0031] 3-Motor; 4-Heating box; 5-Centrifugal fan; 51-Return air inlet; 6-Air duct; 7-Packaging; 8-Shrink oven passage; 9-Shrink oven; 10-Frame. Detailed Implementation

[0032] To further understand the contents of this utility model, the invention will be described in detail with reference to the accompanying drawings.

[0033] Example 1

[0034] The shrink furnace air duct outlet air regulating device in this embodiment, such as Figure 1 , 2As shown in Figures 3 and 4, the device includes a flow guide baffle 11 and a sliding assembly 2. The flow guide baffle 11 receives the air duct 6 inside the shrink furnace 9 and has a branch air outlet 111 on the side facing the shrink furnace channel 8. The branch air outlets 111 are evenly arranged. The sliding assembly 2 includes a screw module, a frame 21, a mounting plate 23, a mounting block 27, a mounting base 20, and a crossbeam 29. The screw module includes a bearing seat 24, a screw 25, and a screw nut 26. The frame 21 and the crossbeam 29 are both fixedly connected to the inlet and outlet ends of the shrink furnace channel 8. The mounting plate 23 is fixedly connected to the inside of the frame 21, and the bearing seat 24 is fixedly connected to the mounting plate 23. The inner end of the screw 25 is rotatably connected to the bearing in the bearing seat 24, and the outer end extends to the outside of the frame 21 for easy adjustment outside the frame 21. Rotating screw 25 causes screw nut 26 to be rotatably connected to the body of screw 25; the upper and lower parts of mounting block 27 are fixedly connected to screw nut 26 and connecting seat 22 respectively; connecting seat 22 is fixedly connected to mounting seat 20; mounting seat 20 is fixedly connected to guide baffle 11; mounting seat 20 is slidably connected and suspended on crossbeam 29; rotating screw 25 causes screw nut 26 to move linearly on the surface of mounting plate 23, which is transmitted to guide baffle 11 in sequence through mounting block 27, connecting seat 22, and mounting seat 20, causing guide baffle 11 to slide laterally along the surface of crossbeam 29. The lower part of guide baffle 11 moves laterally in shrink furnace channel 8, thereby adjusting the distance between guide baffle 11 and packaged product 7 to adapt to the shrinkage requirements of packaged product 7 in shrink furnace channel 8.

[0035] The heat shrink packaging machine for packaging components in this embodiment, such as... Figure 3 As shown, the package includes the above-mentioned shrink oven air duct outlet regulating device, frame 10, shrink oven 9 fixedly connected to the frame 10, and motor 3, heating box 4, centrifugal fan 5 and air duct 6 fixedly connected to the shrink oven 9. The centrifugal fan 5 is located on the top of the shrink oven 9 and is driven by the motor 3. The centrifugal fan 5 rotates and draws in the airflow from the shrink oven channel 8 through the return air port 51. After the airflow is blown out by the rotating blades, the airflow is heated by the heating box 4 and distributed and guided by the air duct 6. It flows into each guide baffle 11 of the heat shrink air duct and flows into the air duct of the shrink oven channel 8 through the uniform small split air outlets 111 on the guide baffle 11.

[0036] The heat shrink film packaging machine of this embodiment guides the flow guide baffle 11 to slide laterally along the crossbeam 29 through the screw module. The distance between the flow guide baffle 11 and the package 7 is adjusted so that the hot airflow from the air duct 6 directly and vertically acts on the package 7 product in the shrink oven channel 8. It has adjustable convenience, improves the appearance and consistency of the film-wrapped product, improves the utilization rate of hot airflow, avoids waste of heat shrink film, and achieves the effects of efficiency improvement, energy saving and environmental protection.

[0037] Example 2

[0038] The basic structure of the shrink oven air duct outlet air regulating device and the heat shrink film packaging machine for packaging in this embodiment is the same as that in Embodiment 1, with the differences or improvements being: For example... Figure 4 , 5 As shown in Figure 6, the lead screw module also includes a guide rod 28. The guide rod 28 passes through the lead screw nut 26 and is fixedly connected at both ends to the bearing seat 24 and the frame 21, respectively. The lead screw nut 26 is slidably connected to the body of the guide rod 28, guiding the lead screw nut 26 to move in a directional linear motion. The mounting base 20 is fixedly connected to a roller 201, which is rotatably connected to the crossbeam 29, making the rotation adjustment operation of the lead screw 25 easier.

[0039] Example 3

[0040] The basic structure of the shrink oven air duct outlet air regulating device and the heat shrink film packaging machine for packaging in this embodiment is the same as that in Embodiment 2, with the following differences or improvements: Figure 7 , 8 As shown, it also includes a flow guiding component 1; the flow guiding component 1 includes a flow guiding adjustment plate 12 and an adjustment air outlet 121 opened on the flow guiding adjustment plate 12; the flow guiding adjustment plate 12 is a strip-shaped perforated plate; the flow guiding adjustment plate 12 is hinged to the air outlet surface of the flow guiding baffle 11. When the flow guiding adjustment plate 12 rotates, it drives each adjustment air outlet 121 and each corresponding diversion air outlet 111 to be misaligned and adjusted, so as to adjust the air volume and wind speed of the diversion air outlet 111, so that the hot airflow is more vertically concentrated on the packaging 7 and the heat loss is reduced.

[0041] The shrink oven air duct outlet air regulating device and the heat shrink film packaging machine of the package in this embodiment can rectify and guide the airflow of the diversion outlet 111, and adjust the diversion outlet 111 according to the optimal air outlet conditions suitable for different sizes, shapes and quantities of packaged items 7, thereby controlling the air outlet of the guide baffle 11.

[0042] Example 4

[0043] The basic structure of the shrink oven air duct outlet air regulating device and the heat shrink film packaging machine for packaging in this embodiment is the same as that in embodiment 3, with the differences or improvements being: For example... Figure 8 , 9 As shown, an adjustment hole 122 is provided at the end of the flow guide plate 12. A limit block 13 is hinged to the adjustment hole 122 by a pin 14. Through the coordinated cooperation of the adjustment hole 122 and the limit block 13, excessive misalignment adjustment of the air outlet 121 and the corresponding diversion air outlet 111 is avoided. The adjustment hole 122 is fan-shaped. The end of the limit block 13 adjusts the up and down movement of the flow guide plate 12 within the fan-shaped range to quantify the misalignment adjustment, making the adjustment within the fan-shaped range more precise.

[0044] Example 5

[0045] The basic structure of the shrink oven air duct outlet air regulating device and the heat shrink film packaging machine for packaging in this embodiment is the same as that in embodiment 4, with the following differences or improvements: Figure 4 As shown, the outer end of the lead screw 25 is a square adjusting head 251 to facilitate force application and rotation adjustment.

[0046] Baffles 11 are arranged along the heat shrink oven channel 8, and their number is determined by the number of air ducts, with each baffle placed on both sides of each air duct. In this embodiment, as shown... Figure 1 , 3 As shown in Figure 4, there are three sets of the flow guide baffle 11 and the corresponding matching flow guide component 1 and sliding component 2. The flow guide baffle 11 divides the shrink oven channel 8 into two air ducts. Each air duct can be heat-shrink packaged, and two rows of packaged products 7 can be packaged in parallel. The width of each air duct can be adjusted individually or together by the sliding component 2. The free-flowing airflow passing through the small split air outlet 111 is rectified and guided, reducing the influence of the return air outlet 51 position on the airflow direction, improving the uniformity of the air outlet of the shrink oven 9, and improving the shrinkage effect.

[0047] In this embodiment, the air outlet regulating device of the shrink oven and the heat shrink film packaging machine of the packaging package, the sliding component 2 of the guide baffle 11 can be adjusted according to the actual situation, and the appropriate blowing distance can be adjusted for packaging packages 7 of different sizes and widths, so as to achieve the most precise control of the air outlet 121.

[0048] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited to these. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A shrink furnace air duct outlet air regulating device, characterized in that, include: A flow guide baffle is connected to an external air duct, and a diversion air outlet is opened on the side facing the shrink furnace passage; A sliding assembly, which includes a lead screw module; The flow guide baffle is suspended on the sliding assembly and slidably connected to the lead screw module; The sliding assembly includes a frame, a mounting plate, a mounting block, a mounting base, and a crossbeam; The lead screw module includes a bearing housing, a lead screw, and a lead screw nut; The frame and crossbeams are fixedly connected to the inlet and outlet ends of the shrink furnace channel; The mounting plate is fixedly connected to the frame, and the bearing seat is fixedly connected to the mounting plate; the inner end of the lead screw is rotatably connected to the bearing seat, and the outer end extends to the outside of the frame; the lead screw nut is rotatably connected to the lead screw; the upper and lower parts of the mounting block are fixedly connected to the lead screw nut and the connecting seat respectively; the connecting seat is fixedly connected to the mounting seat; the mounting seat is fixedly connected to the guide baffle; the mounting seat is slidably connected to the crossbeam.

2. The shrink furnace air duct outlet air regulating device according to claim 1, characterized in that: The mounting base is fixedly connected to a roller, and the roller is slidably connected to the crossbeam.

3. The shrink furnace air duct outlet air regulating device according to claim 2, characterized in that: The lead screw module also includes a guide rod, which passes through the lead screw nut and is fixedly connected at both ends to the bearing seat and the frame, respectively.

4. The shrink furnace air duct outlet air regulating device according to any one of claims 1-3, characterized in that: It also includes a flow guiding component; the flow guiding component includes a flow guiding adjustment plate and an adjustment air outlet opened on the flow guiding adjustment plate; the flow guiding adjustment plate is hinged to the air outlet surface of the flow guiding baffle, and the adjustment air outlet and the diversion air outlet are misaligned when the flow guiding adjustment plate rotates.

5. The shrink furnace air duct outlet air regulating device according to claim 4, characterized in that: An adjustment hole is provided at the end of the flow guide plate, and a limit block is hinged in the adjustment hole by a pin.

6. The shrink furnace air duct outlet air regulating device according to claim 5, characterized in that: The adjustment hole is fan-shaped, and the end of the limiting block adjusts the up and down movement of the flow guide plate within the fan-shaped range.

7. A heat shrink film packaging machine for packaging items, characterized in that: It is equipped with the air outlet regulating device for the shrink furnace air duct as described in any one of claims 1-3 and 5-6.

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