A heat shrink machine that is easy to adjust

Abstract

This utility model relates to the field of packaging equipment technology, specifically a heat shrink machine that is easy to adjust. It includes a shell, a heat insulation plate disposed inside the shell, an airflow adjustment mechanism, a diffusion mechanism, and a diffusion plate. The airflow adjustment mechanism is disposed on the heat insulation plate, and the diffusion mechanism is disposed inside the shell. A connecting shaft is disposed at the center of the diffusion plate. Through the diffusion mechanism, a cylinder reciprocates to push the diffusion plate, which rotates under the action of a gear and rack. This causes the diffusion plate to reciprocate within the shell, rapidly stirring and mixing the hot air generated by the heating rod. This reciprocating rotation breaks up the stratification of the hot air, forcibly mixing the high-temperature and low-temperature zones to form a uniform heat flow. Furthermore, it creates forced convection circulation of hot air within the heating chamber, preventing the shrink film from charring or perforating due to localized high temperatures, or from insufficient shrinkage force due to low temperatures.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a heat shrink machine that is easy to adjust. Background Technology

[0002] A heat shrink machine is a machine that wraps a product in heat shrink film and then heats it to shrink the film and wrap the product. This device greatly facilitates the transportation of products. Since the thickness of the film varies, the required temperature also needs to be adjustable.

[0003] Chinese Patent CN221914932U discloses a conveniently adjustable heat shrink machine, including a base plate. This conveniently adjustable heat shrink machine, when placed in a designated position, allows air to enter through the air inlet by rotating the shaft. A heating rod heats the air in the channel, pulling up a sliding rod and separating its bottom from the slot. The sliding bar is then pulled out and adjusted to a suitable length. Releasing the sliding rod allows it to return to its corresponding slot via a return spring and a limiting block, thus fixing the sliding bar. Simultaneously, the air outlet is opened, allowing hot air to be delivered into the machine body. Products wrapped in film are then placed into the machine body, where the hot air heats the film, causing it to shrink. The hot air outlet of this device can be manually controlled, facilitating temperature control by the user. The temperature can be adjusted according to the different products, which is beneficial for product lamination and ensures the film does not soften excessively, thus facilitating practical application and operation.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: existing heat shrink machines cannot allow hot air to spread quickly and evenly, resulting in poor processing effect of shrink film, and they cannot adjust the temperature and ventilation volume, which makes it easy to over-shrink or under-shrink when dealing with shrink films of different thicknesses. Utility Model Content

[0005] The purpose of this invention is to address the problem in the prior art that hot air cannot be mixed quickly and evenly, and that temperature and ventilation volume cannot be adjusted, by proposing a heat shrink machine that is easy to adjust.

[0006] The technical solution of this utility model: A heat shrink machine that is easy to adjust, including a shell and a heat insulation plate disposed inside the shell; further comprising:

[0007] An air volume regulating mechanism is installed on the heat insulation plate and is used to control the corresponding air volume blown out by the heat shrink machine according to the speed of conveying the shrink film.

[0008] The diffusion mechanism is located inside the housing and is used to rotate and stir the hot air after the air volume regulating mechanism blows out the hot air.

[0009] The diffuser plate has a connecting shaft at its center and a spur gear at its end. A rack is located at the bottom of the spur gear, and the side of the rack is connected to the inside of the outer shell. The spur gear rolls on the rack under the drive of the diffusion mechanism, thereby driving the diffuser plate to roll inside the outer shell through the connecting shaft. During the rolling process, the diffuser plate stirs the hot air inside the outer shell, causing the hot air inside the outer shell to diffuse.

[0010] Preferably, the top of the heat insulation plate is provided with a ramp, and two ramps are symmetrically arranged about the heat insulation plate. The inner side of the outer shell is provided with an electric heating rod, the top of the outer shell is provided with an installation box, the top of the installation box is provided with a motor, the output end of the motor is provided with a rotating shaft, the bottom of the rotating shaft is provided with an air blower, and the outer side of the outer shell is provided with a knob.

[0011] Preferably, the air volume regulating mechanism includes a power component and a regulating component;

[0012] The power unit is mounted on the housing and is used to drive the adjustment unit to rotate;

[0013] The adjustment component is located on the heat insulation plate and is used to adjust the size of the opening to control the air volume.

[0014] Preferably, the power assembly includes a threaded rod, a sealing block, a retaining ring, a rotating frame, and a telescopic rod;

[0015] The threaded rod is threaded onto the outer casing, the sealing block is located on the outer side of the outer casing, and the outer side of the threaded rod and the inner side of the sealing block are threadedly connected. The fixing ring is located on the outer side of the threaded rod, the rotating frame is rotatably located on the side of the fixing ring, the telescopic rod is located at the end of the rotating frame away from the fixing ring, and the end of the threaded rod is provided with a power rod.

[0016] Preferably, the adjustment assembly includes a mounting plate, a through pipe, a sliding shaft, a connecting frame, a closed rotating block, and a rotating plate;

[0017] The mounting plate is placed on the heat insulation plate, the through pipe is placed on the mounting plate, the rotating plate is rotatably placed inside the through pipe, the rotating plate is provided with a rotating groove, the closed rotating block is slidably placed in the rotating groove, the sliding shaft is placed on the side of the closed rotating block, the connecting bracket is placed inside the through pipe, and the side of the connecting plate and the bottom of the rotating plate are in contact.

[0018] Preferably, the diffusion mechanism includes a cylinder, a fixed frame, a push rod, and a connecting block;

[0019] The fixing frame is located on the outside of the housing, the cylinder is located on the inside of the fixing frame, the push rod is located at the output end of the cylinder, the connecting block is located on the outside of the push rod, the outer side of the connecting block is provided with a sealing plate, the side of the connecting block is provided with a sliding block, and the side of the sliding block away from the connecting block is rotatably connected to the end of the connecting shaft.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] 1. By setting up an airflow adjustment mechanism, rotating the threaded rod drives the rotating plate to rotate, which in turn drives the closed rotating block to rotate, thereby adjusting the size of the opening between the closed rotating blocks. The motor drives the air blower to rotate, blowing the heat generated by the heating rod to the bottom of the heat insulation plate. This ensures that the film shrinks evenly, with a smooth and defect-free surface, achieving tight wrapping of the thick film. For the thin film, low airflow can reduce the motor load and heating energy consumption, reducing the cost per unit of packaging. For the thick film, although high airflow increases energy consumption, some of the energy consumption increase can be offset by shortening the heating time.

[0022] 2. Through the setting of the diffusion mechanism, the cylinder pushes the diffusion plate back and forth. The diffusion plate rotates under the action of the gear and rack, so that the diffusion plate rotates back and forth in the shell, which quickly stirs and mixes the hot air generated by the heating rod. In this way, the back and forth rolling breaks the stratification of hot air, and forces the hot air in the high temperature zone and the low temperature zone to mix, forming a uniform heat flow. It also makes the hot air form a forced convection circulation in the heating chamber, thereby preventing the shrink film from charring or perforating due to local high temperature, or insufficient shrinkage force due to low temperature. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Internal structure diagram;

[0025] Figure 3 This is a schematic diagram of the air volume regulating mechanism;

[0026] Figure 4 This is a partial structural diagram of the airflow regulation mechanism;

[0027] Figure 5 This is a schematic diagram of the diffusion mechanism.

[0028] Reference numerals: 1. Outer shell; 2. Insulation plate; 3. Inclined platform; 401. Threaded rod; 402. Sealing block; 403. Rotating plate; 404. Rotating groove; 405. Enclosed rotating block; 406. Sliding shaft; 407. Connecting frame; 408. Power rod; 409. Fixing ring; 410. Rotating frame; 411. Telescopic rod; 412. Mounting plate; 501. Motor; 502. Rotating shaft; 503. Air blower; 504. Mounting box; 601. Cylinder; 602. Fixing frame; 603. Push rod; 604. Connecting block; 605. Sealing plate; 606. Sliding block; 607. Circular gear; 608. Rack; 609. Connecting shaft; 610. Diffuser plate; 7. Knob; 8. Heating rod. Detailed Implementation

[0029] Example 1

[0030] like Figures 1-4 As shown, the present invention proposes a heat shrink machine that is easy to adjust, including a shell 1, a heat insulation plate 2 disposed inside the shell 1, an air volume adjustment mechanism, a diffusion mechanism, and a diffusion plate 610.

[0031] The air volume adjustment mechanism is set on the heat insulation plate 2 and is used to control the corresponding air volume blown out by the heat shrink machine according to the speed of conveying the shrink film.

[0032] The diffusion mechanism is located inside the outer casing 1 and is used to rotate and stir the hot air after the air volume regulating mechanism blows out the hot air.

[0033] A connecting shaft 609 is provided at the center of the diffuser plate 610. A spur gear 607 is provided at the end of the connecting shaft 609. A rack 608 is provided at the bottom of the spur gear 607. The side of the rack 608 is connected to the inside of the outer shell 1. The spur gear 607 rolls on the rack 608 under the drive of the diffusion mechanism, thereby driving the diffuser plate 610 to roll inside the outer shell 1 through the connecting shaft 609. During the rolling process, the diffuser plate 610 stirs the hot air inside the outer shell 1, causing the hot air inside the outer shell 1 to diffuse.

[0034] The top of the heat insulation plate 2 is provided with a ramp 3, and there are two ramps symmetrically arranged about the heat insulation plate 2. The inner side of the outer shell 1 is provided with an electric heating rod 8, which is located above the heat insulation plate 2. The top of the outer shell 1 is provided with a mounting box 504, and the top of the mounting box 504 is provided with a motor 501. The output end of the motor 501 is provided with a rotating shaft 502, and the bottom of the rotating shaft 502 is provided with an air blower 503. The outer side of the outer shell 1 is provided with a knob 7. Turning the knob 7 can control the heating efficiency of the electric heating rod 8. When the motor 501 is started, the motor 501 drives the air blower 503 to rotate through the rotating shaft 502. The air blower 503 blows airflow to blow the hot air generated by the electric heating rod 8 to the bottom of the heat insulation plate 2. The ramp 3 can guide the airflow to the middle of the heat insulation plate 2 for easy concentration.

[0035] The airflow regulation mechanism includes a power component and an adjustment component. The power component is mounted on the housing 1 and drives the adjustment component to rotate. The adjustment component is mounted on the heat insulation plate 2 and adjusts the opening size to control the airflow. The power component includes a threaded rod 401, a sealing block 402, a fixing ring 409, a rotating frame 410, and a telescopic rod 411. The threaded rod 401 is threaded onto the housing 1. The sealing block 402 is located on the outer side of the housing 1, and the outer side of the threaded rod 401 and the inner side of the sealing block 402 are threadedly connected. The fixing ring 409 is located on the outer side of the threaded rod 401. The rotating frame 410 is rotatably mounted on the side of the fixing ring 409. The telescopic rod 411 is located at the end of the rotating frame 410 away from the fixing ring 409. A power rod 408 is provided at the end of the rod 401. When the power rod 408 is rotated, the power rod 408 drives the threaded rod 401 to rotate. Since the threaded rod 401 is threadedly connected to the outer shell 1, the threaded rod 401 moves on the outer shell 1 when it rotates, thereby driving the fixed ring 409 to move. Multiple fixed rings 409 are arranged at equal intervals on the threaded rod 401. Multiple fixed rings 409 move synchronously, thereby driving the telescopic rod 411 to move through the rotating frame 410. The telescopic rod 411 adjusts the connection length by extending and retracting when it moves. The adjustment assembly includes a mounting plate 412, a through pipe, a sliding shaft 406, a connecting frame 407, a closing rotating block 405, and a rotating plate 403. The mounting plate 412 is mounted on the heat insulation plate 2, and the through pipe is mounted on the mounting plate 412. Multiple through pipes are arranged at equal intervals on the mounting plate 412. The rotating plate 403 is rotatably mounted inside the through pipe, and the outer side of the rotating plate 403 is connected to the end of the telescopic rod 411. The rotating plate 403 is provided with a rotating groove 404, which is a regular hexagon. The closing rotating block 405 is slidably mounted inside the rotating groove 404. The sliding shaft 406 is located on the side of the closing rotating block 405. The connecting frame 407 is located inside the through pipe, and the side of the connecting plate is in contact with the bottom of the rotating plate 403. When the telescopic rod 411 moves, it drives the rotating plate 403 to rotate. When the rotating plate 403 rotates, it drives the closing rotating block 405 to rotate, thereby adjusting the size of the opening between the closing rotating blocks 405.

[0036] Example 2

[0037] like Figure 5 As shown, this utility model proposes a heat shrink machine that is easy to adjust. Compared with Embodiment 1, this embodiment details the structure of the diffusion mechanism.

[0038] The diffusion mechanism includes a cylinder 601, a fixed frame 602, a push rod 603, and a connecting block 604. The fixed frame 602 is located on the outside of the outer shell 1, the cylinder 601 is located on the inside of the fixed frame 602, the push rod 603 is located at the output end of the cylinder 601, and the connecting block 604 is located on the outside of the push rod 603. A sealing plate 605 is provided on the outside of the connecting block 604, and a sliding block 606 is provided on the side of the connecting block 604. The side of the sliding block 606 away from the connecting block 604 is rotatably connected to the end of the connecting shaft 609. When the cylinder 601 is activated, the cylinder 601 drives the connecting block 604 to move back and forth through the push rod 603. The connecting block 604 drives the spur gear 607 to move through the sliding block 606 and the connecting shaft 609, thereby driving the diffuser plate 610 to rotate back and forth, stirring the hot air inside the outer shell 1 evenly. The sealing plate 605 is used to block the connection between the sliding block 606 and the outer shell 1 to prevent hot air from escaping.

[0039] In summary, when this utility model is used, the heating rod 8, motor 501, and cylinder 601 are started. The power rod 408 rotates according to the conveyor belt speed, driving the threaded rod 401 to rotate. As the threaded rod 401 rotates, it moves on the outer casing 1, thereby moving the fixed rings 409. Multiple fixed rings 409 move synchronously, thus driving the telescopic rod 411 to move via the rotating frame 410. The telescopic rod 411 moves, driving the rotating plate 403 to rotate. The rotating plate 403 rotates, driving the closing rotating blocks 405 to rotate, thereby adjusting the opening size between the closing rotating blocks 405 and controlling the airflow. The knob 7 is rotated according to the thickness of the shrink film, controlling the heating efficiency of the heating rod 8. The motor 501, via the rotating shaft 50... 2 drives the air blower 503 to rotate, and the air blower 503 blows airflow to blow the hot air generated by the electric heating rod 8 to the bottom of the heat insulation plate 2. At the same time, the cylinder 601 drives the connecting block 604 to move back and forth through the push rod 603. The connecting block 604 drives the sprocket 607 to move through the sliding block 606 and the connecting shaft 609. When the sprocket 607 moves, it rolls on the rack 608, thereby driving the diffuser plate 610 to roll inside the outer shell 1 through the connecting shaft 609, so as to stir the hot air inside the outer shell 1 evenly. The sealing plate 605 is used to block the connection between the sliding block 606 and the outer shell 1 to prevent the hot air from overflowing. The bottom of the outer shell 1 is provided with a through groove to allow the shrink film to pass through and enter the outer shell 1. The hot air causes the shrink film to shrink and wrap, thus completing the work.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A heat shrink machine that is easy to adjust, comprising a housing (1) and a heat insulation plate (2) disposed inside the housing (1); characterized in that, Also includes: Air volume adjustment mechanism, which is set on the heat insulation plate (2), is used to control the air volume blown out by the heat shrink machine according to the speed of conveying the shrink film; A diffusion mechanism is located inside the outer casing (1) and is used to rotate and stir the hot air after the air volume regulating mechanism blows out the hot air. And a diffuser plate (610), a connecting shaft (609) is provided at the center of the diffuser plate (610), a spur gear (607) is provided at the end of the connecting shaft (609), a rack (608) is provided at the bottom of the spur gear (607), the side of the rack (608) is connected to the inside of the outer shell (1), the spur gear (607) rolls on the rack (608) under the drive of the diffusion mechanism, thereby driving the diffuser plate (610) to roll inside the outer shell (1) through the connecting shaft (609), and the hot air inside the outer shell (1) is stirred during the rolling of the diffuser plate (610) so that the hot air inside the outer shell (1) is diffused.

2. The easily adjustable heat shrink machine according to claim 1, characterized in that, The top of the heat insulation plate (2) is provided with a ramp (3), and there are two ramps (3) symmetrically arranged about the heat insulation plate (2). The inner side of the outer shell (1) is provided with an electric heating rod (8). The top of the outer shell (1) is provided with an installation box (504). The top of the installation box (504) is provided with a motor (501). The output end of the motor (501) is provided with a rotating shaft (502). The bottom of the rotating shaft (502) is provided with an air blower (503). The outer side of the outer shell (1) is provided with a knob (7).

3. The easily adjustable heat shrink machine according to claim 1, characterized in that, The air volume regulation mechanism includes a power component and a regulation component; The power assembly is mounted on the housing (1) and is used to drive the adjustment assembly to rotate; The adjustment component is set on the heat insulation plate (2) and is used to adjust the size of the opening to control the air volume.

4. The easily adjustable heat shrink machine according to claim 3, characterized in that, The power assembly includes a threaded rod (401), a sealing block (402), a retaining ring (409), a rotating frame (410), and a telescopic rod (411); The threaded rod (401) is threaded onto the outer shell (1), the sealing block (402) is located on the outer side of the outer shell (1), and the outer side of the threaded rod (401) and the inner side of the sealing block (402) are threadedly connected. The fixing ring (409) is located on the outer side of the threaded rod (401), the rotating frame (410) is rotatably located on the side of the fixing ring (409), the telescopic rod (411) is located at the end of the rotating frame (410) away from the fixing ring (409), and the end of the threaded rod (401) is provided with a power rod (408).

5. The easily adjustable heat shrink machine according to claim 4, characterized in that, The adjustment assembly includes a mounting plate (412), a through pipe, a sliding shaft (406), a connecting bracket (407), a closed rotating block (405), and a rotating plate (403); The mounting plate (412) is set on the heat insulation plate (2), the through pipe is set on the mounting plate (412), the rotating plate (403) is rotatably set on the inside of the through pipe, the rotating plate (403) is provided with a rotating groove (404), the closing rotating block (405) is slidably set in the rotating groove (404), the sliding shaft (406) is set on the side of the closing rotating block (405), the connecting bracket (407) is set on the inside of the through pipe, and the side of the connecting plate and the bottom of the rotating plate (403) are in contact.

6. The easily adjustable heat shrink machine according to claim 1, characterized in that, The diffusion mechanism includes a cylinder (601), a mounting bracket (602), a push rod (603), and a connecting block (604); The fixing frame (602) is located on the outside of the outer shell (1), the cylinder (601) is located on the inside of the fixing frame (602), the push rod (603) is located at the output end of the cylinder (601), the connecting block (604) is located on the outside of the push rod (603), the outer side of the connecting block (604) is provided with a sealing plate (605), the side of the connecting block (604) is provided with a sliding block (606), and the side of the sliding block (606) away from the connecting block (604) is rotatably connected to the end of the connecting shaft (609).

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