Jet-propelled heat shrink packaging machine

Abstract

The invention relates to the technical field of heat shrinkage packaging, and discloses a jet-propelled heat shrinkage packaging machine which comprises a machining table, a connecting shell is arranged on the right side of the top of the machining table, a machining box piece is arranged on the left side of the top of the machining table, and a feeding box door is hinged to the left side of the machining box piece; and a guide thermal shrinkage assembly is arranged in the processing box piece. According to the jet-propelled thermal shrinkage packaging machine, the guide thermal shrinkage assembly is arranged, the heating wire is started to heat the surface of the annular heating jet cavity, the heating wire is spirally distributed, it is ensured that heat can be evenly dissipated, and the outer layer of the heating wire is covered with a layer of heat insulation material so that heat dissipation to the outside can be reduced; hot air is sent out through the air outlet head and the small air spraying holes formed in the surface, the hot air is sprayed to the packaging film at a high speed through the small air spraying holes under the pressure effect, the film is rapidly heated and shrunk, the orientation of the air outlet head can be adjusted in the using process, and thermal shrinkage treatment can be conducted on the film at different positions.

Description

Technical Field

[0001] The present invention relates to the technical field of heat shrink packaging, and specifically to a jet heat shrink packaging machine. Background Art

[0002] In the field of commodity packaging, heat shrink packaging, as a commonly used packaging method, is widely used in many industries such as food, beverages, daily necessities, and electronic products due to its advantages of effectively protecting commodities, enhancing the display effect of commodities, and facilitating transportation and storage. Heat shrink packaging is achieved by utilizing the property that heat shrinkable film can rapidly shrink and tightly wrap commodities when heated.

[0003] The prior art discloses a jet heat shrink packaging machine with the publication number: CN219407196U, which includes a frame, a housing installed at the central position on the upper surface of the frame, and a main chassis arranged at the central position on the upper surface of the housing. A hollow groove is horizontally arranged inside the housing, and side air guide grooves communicating with the hollow groove are symmetrically arranged on both sides of the hollow groove. A top air outlet hole penetrating through the top inner wall of the housing is arranged on the hollow groove. Through holes are arranged on the side walls of the two side air guide grooves close to each other. An air duct communicating with the side air guide groove is arranged on the bottom surface of the inner wall of the side air guide groove. A chain plate conveyor belt is arranged at the central position of the frame. The air duct is arranged in the middle of the chain plate conveyor belt, and air guide holes with a vertically upward direction are arranged on the air duct. A fan with a downward air direction and a heating rod arranged directly below the fan are arranged inside the main chassis. The jet heat shrink packaging machine guides the hot air in the hollow groove through the side air guide grooves.

[0004] The above jet heat shrink packaging machine guides the hot air in the hollow groove through the side air guide grooves, allowing the hot air to blow out from the top air outlet hole above and the side air guide grooves on the side, realizing the heat shrinkage of the side and top of the outer plastic coating film of food. However, the above device cannot adjust the direction of the hot air when blowing the hot air, and cannot centrally and quickly perform heat shrinkage on different positions of the film through the guiding method, resulting in poor use effect, and thus improvement is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a jet heat shrink packaging machine to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a jet heat shrink packaging machine, comprising a processing table, a connection housing is provided on the right side of the top of the processing table, a processing box member is provided on the left side of the top of the processing table, a feed box door is hinged to the left side of the processing box member, a guiding heat shrinkage component is provided inside the processing box member, an adjustable film transmission component is provided on the top of the processing table, and an adjustment angle control component is provided on the surface of the guiding heat shrinkage component.

[0007] The guiding heat shrinkage component includes a connection box member, a hollow plate, a telescopic pipe fitting, an annular heating jet cavity, a jet end, a surface heat preservation ring block, an inner heat preservation pad, a heating wire, a heat insulation material, a hot air outlet pipe, a telescopic connection pipe body, an air outlet head, jet holes and a hot air diversion plate. The connection box member is fixedly connected to the right top of the feed box door, the hollow plate is fixedly connected to the left side of the connection box member, the telescopic pipe fitting is fixedly connected to the left side of the hollow plate, the annular heating jet cavity is fixedly connected to the left side of the telescopic pipe fitting, the jet end is fixedly connected to the left side of the annular heating jet cavity, the surface heat preservation ring block is fixedly connected to the surface of the annular heating jet cavity, the inner heat preservation pad is fixedly connected to the inside of the surface heat preservation ring block, the bottom end of the inner heat preservation pad is connected to the surface of the annular heating jet cavity, the heating wire is fixedly connected to the surface of the annular heating jet cavity, the heat insulation material is fixedly connected to the surface of the heating wire, the hot air outlet pipe is fixedly connected to the left side of the jet end, the telescopic connection pipe body is fixedly connected to the bottom of the hot air outlet pipe, the air outlet head is fixedly connected to the bottom of the telescopic connection pipe body, and the hot air diversion plate is connected to the front and back inner walls of the feed box door near the left side. By providing a hot air diversion plate, and the hot air diversion plate is made of a light and heat-resistant metal or ceramic material, the surface is specially treated, having low roughness and high reflectivity, which can effectively guide the direction of the hot air flow. By providing jet holes, the hot air is ejected onto the packaging film at a high speed through the jet holes under the action of pressure, so that the film is quickly heated and shrunk, and the orientation of the air outlet head can be adjusted during use, and the heat shrinkage treatment of the film at different positions can be carried out.

[0008] Preferably, the adjustable film body transmission assembly includes a transmission belt, a bottom plate, a film body limiting frame, a top connecting plate, a hydraulic telescopic rod, a pressing plate, a telescopic frame, an inner telescopic adjustment block, an adjustment belt, a sliding plate, a connecting torque plate and a fixing bolt. A driving assembly is arranged on the inner front surface of the feed box door. The transmission belt is arranged at the inner bottom end of the feed box door. The bottom plate is fixedly connected to the left side of the top of the transmission belt. The film body limiting frame is fixedly connected to the top of the bottom plate. A film body passing slot is formed inside the film body limiting frame. The top connecting plate is fixedly connected to the top of the film body limiting frame. The hydraulic telescopic rod is fixedly connected to the top of the top connecting plate. The pressing plate is fixedly connected to the bottom of the hydraulic telescopic rod. The telescopic frame is fixedly connected to the top of the bottom plate near the side. The inner telescopic adjustment block is connected to the inside of the telescopic frame. The adjustment belt is fixedly connected to the end of the inner telescopic adjustment block away from the telescopic frame. The sliding plate is fixedly connected to the side of the adjustment belt. The connecting torque plate is fixedly connected to the bottom of the front surface of the sliding plate. The fixing bolt is threadedly connected to the top of the bottom plate. By adjustment, the center of the film body can be aligned with the center of the film body limiting frame, and the distance between the sliding plates can be adjusted according to the width of the film body. The film body is limited during transmission to ensure stable transmission.

[0009] Preferably, the adjustment angle control assembly includes a vertical frame, a connecting block, a bearing member, a rotating shaft rod, a magnetic attraction block, a magnet ring member and a connecting thin rod. The vertical frame is fixedly connected to the top of the processing table. The connecting block is fixedly connected to the top of the vertical frame. The bearing member is fixedly connected to the side of the connecting block. The rotating shaft rod is fixedly connected to the side of the annular heating and jetting cavity. The magnetic attraction block is fixedly connected to the right side of the rotating shaft rod. A connecting member is fixedly connected to the top side of the connecting block. The connecting thin rod is fixedly connected to the right side of the connecting member. The magnet ring member is fixedly connected to the right side of the connecting thin rod.

[0010] Preferably, eight groups of the hollow rectangular blocks are annularly distributed on the surface of the air outlet head, and the jetting small holes are formed on the surface of the hollow rectangular blocks.

[0011] Preferably, the inside of the surface heat preservation ring block is of a hollow structure. The surface heat preservation ring block and the inner heat preservation pad are subjected to heat preservation treatment, and the hollow design allows the inner heat preservation pad to fit on the surface of the heating wire to help better heat preservation.

[0012] Preferably, a through slot is formed inside the top connecting plate, and a through hole identical to the through slot is formed at the top end of the film body limiting frame. The through slot and the through hole allow the sliding rod part of the hydraulic telescopic rod to move, and then drive the pressing plate to move to press the head end of the film body, facilitating transmission.

[0013] Preferably, the magnetic attraction block is slidably connected to the inner ring of the magnet ring member, the magnetic attraction block is magnetically connected to the magnet ring member, and the rotating shaft rod penetrates through the connecting block and extends to be connected to the inner ring of the bearing member.

[0014] Preferably, threaded grooves are formed inside the connecting rectangular plate, threaded holes with the same diameter as the threaded grooves are formed at the top of the bottom plate, and the fixing bolts are threadedly connected inside the connecting rectangular plate. The fixing bolts serve to lock the sliding plate. A width limiting component is provided to ensure that the spacing between the sliding plates matches the width of the film body, and limit the film body during transmission to ensure stable transmission.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For this jet-type heat shrink packaging machine, by providing a guiding heat shrinkage component, the heating wire is started to heat on the surface of the annular heating jet cavity. The heating wire is spirally distributed to ensure uniform heat dissipation. A layer of heat insulation material is covered on the outer layer of the heating wire to reduce heat loss to the outside. The hot air is sent out through the air outlet head and the jet holes formed on the surface. Under the action of pressure, the hot air is sprayed onto the packaging film at a high speed through the jet holes, causing the film to quickly heat and shrink. Moreover, the orientation of the air outlet head can be adjusted during use, enabling heat shrinkage treatment of the film at different positions.

[0016] 2. For this jet-type heat shrink packaging machine, by providing an adjustable film body transmission component, the film body feeding groove inside the processing box part is opened, and then the film is extended into the inside of the processing box part. Then the head end is passed through the film body limiting frame, and when passing through, the center of the film body needs to be aligned with the center of the film body limiting frame. Moreover, the spacing between the sliding plates can be adjusted according to the width of the film body, and limit the film body during transmission to ensure stable transmission.

[0017] 3. For this jet-type heat shrink packaging machine, by providing an adjustment angle control component, the rotating shaft rod is driven to rotate, driving the magnetic attraction block to rotate synchronously and slide along the inner ring of the magnet ring part. After adjustment, due to the magnetic attraction contact between the magnetic attraction block and the magnet ring part, it can be magnetically locked without external force, and it is convenient to know the adjustment angle, enabling the hot air to be concentrated and sprayed onto the key parts where the film needs to shrink, such as the corners and edges of the article, for concentrated heat shrinkage, quickly performing heat shrinkage on different positions of the film. The adjustment angle control component is used in cooperation with the guiding heat shrinkage component to ensure normal angle adjustment and assist in locking, with good effects during use.

[0018] 4. For this jet-type heat shrink packaging machine, by providing a hot air deflector, and the hot air deflector is made of a light and heat-resistant metal or ceramic material, with a special treatment on the surface, having low roughness and high reflectivity, which can effectively guide the direction of the hot air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present invention; Figure 2Schematic three-dimensional structure diagram of the processing table, guiding heat shrinkage component and adjustable film body transmission component of the present invention; Figure 3 For the present invention Figure 2 Schematic enlarged structure diagram at position A in; Figure 4 For the present invention Figure 2 Schematic enlarged structure diagram at position B in; Figure 5 Schematic three-dimensional structure diagram of the adjustable film body transmission component of the present invention; Figure 6 For the present invention Figure 5 Schematic enlarged structure diagram at position C in.

[0020] In the figure: 1. Processing table; 2. Connecting shell; 3. Processing box part; 4. Feed box door; 5. Guiding heat shrinkage component; 501. Connecting box part; 502. Hollow plate; 503. Telescopic pipe fitting; 504. Annular heating jet cavity; 505. Jet end; 506. Surface heat preservation ring block; 507. Inner heat preservation pad; 508. Heating wire; 509. Heat insulation material; 510. Hot gas outlet pipe; 511. Telescopic connecting pipe body; 512. Air outlet head; 513. Jet small holes; 514. Hot gas flow guiding plate; 6. Adjustable film body transmission component; 601. Transmission belt; 602. Bottom plate; 603. Film body limiting frame; 604. Top connecting plate; 605. Hydraulic telescopic rod; 606. Pressing and fixing plate; 607. Telescopic frame; 608. Inner telescopic adjustment block; 609. Adjusting belt; 610. Sliding plate; 611. Connecting rectangular plate; 612. Fixed bolt; 7. Adjusting angle control component; 701. Upright frame; 702. Connecting block; 703. Bearing part; 704. Rotating shaft rod; 705. Magnetic attraction block; 706. Magnet ring part; 707. Connecting thin rod. Detailed implementation manners

[0021] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-6 , the present invention provides the following technical solutions: A jet heat shrink packaging machine includes a processing table 1. On the right side of the top of the processing table 1, there is a connecting housing 2. On the left side of the top of the processing table 1, there is a processing box part 3. A feed box door 4 is hinged on the left side of the processing box part 3. Inside the processing box part 3, there is a guiding heat shrinkage component 5. On the top of the processing table 1, there is an adjustable film body transmission component 6. On the surface of the guiding heat shrinkage component 5, there is an adjusting angle control component 7.

[0023] The guiding heat shrinkage component 5 includes a connecting box part 501, a hollow plate 502, a telescopic pipe part 503, an annular heating and jetting cavity 504, a jetting end 505, a surface heat preservation ring block 506, an inner heat preservation pad 507, a heating wire 508, a heat insulation material 509, a hot gas outlet pipe 510, a telescopic connecting pipe body 511, an air outlet head 512, jetting small holes 513 and a hot gas diversion plate 514. The connecting box part 501 is fixedly connected to the top right side of the feed box door 4. The hollow plate 502 is fixedly connected to the left side of the connecting box part 501. The telescopic pipe part 503 is fixedly connected to the left side of the hollow plate 502. The annular heating and jetting cavity 504 is fixedly connected to the left side of the telescopic pipe part 503. The jetting end 505 is fixedly connected to the left side of the annular heating and jetting cavity 504. The surface heat preservation ring block 506 is fixedly connected to the surface of the annular heating and jetting cavity 504. The inner heat preservation pad 507 is fixedly connected to the inside of the surface heat preservation ring block 506. The bottom end of the inner heat preservation pad 507 is connected to the surface of the annular heating and jetting cavity 504. The heating wire 508 is fixedly connected to the surface of the annular heating and jetting cavity 504. The heat insulation material 509 is fixedly connected to the surface of the heating wire 508. The hot gas outlet pipe 510 is fixedly connected to the left side of the jetting end 505. The telescopic connecting pipe body 511 is fixedly connected to the bottom of the hot gas outlet pipe 510. The air outlet head 512 is fixedly connected to the bottom of the telescopic connecting pipe body 511. The hot gas diversion plate 514 is connected to the front and back inner walls of the feed box door 4 near the left side. There are eight groups of hollow rectangular blocks annularly distributed on the surface of the air outlet head 512. The jetting small holes 513 are opened on the surface of the hollow rectangular blocks. The inside of the surface heat preservation ring block 506 is of a hollow structure. The surface heat preservation ring block 506 and the inner heat preservation pad 507 are subjected to heat preservation treatment, and the hollow design allows the inner heat preservation pad 507 to fit on the surface of the heating wire 508 to help with better heat preservation.

[0024] The adjustable film body transmission assembly 6 includes a transmission belt 601, a bottom plate 602, a film body limiting frame 603, a top connection plate 604, a hydraulic telescopic rod 605, a pressing plate 606, a telescopic frame 607, an inner telescopic adjustment block 608, an adjustment belt 609, a sliding plate 610, a connecting rectangular plate 611, and a fixing bolt 612. A driving assembly is provided on the inner front surface of the feed box door 4. The transmission belt 601 is arranged at the inner bottom end of the feed box door 4. The bottom plate 602 is fixedly connected to the top left side of the transmission belt 601. The film body limiting frame 603 is fixedly connected to the top of the bottom plate 602. A film body passing slot is opened inside the film body limiting frame 603. The top connection plate 604 is fixedly connected to the top of the film body limiting frame 603. The hydraulic telescopic rod 605 is fixedly connected to the top of the top connection plate 604. The pressing plate 606 is fixedly connected to the bottom of the hydraulic telescopic rod 605. The telescopic frame 607 is fixedly connected to the top of the bottom plate 602 near the side. The inner telescopic adjustment block 608 is connected to the inside of the telescopic frame 607. The adjustment belt 609 is fixedly connected to the end of the inner telescopic adjustment block 608 away from the telescopic frame 607. The sliding plate 610 is fixedly connected to the side of the adjustment belt 609. The connecting rectangular plate 611 is fixedly connected to the bottom front of the sliding plate 610. The fixing bolt 612 is threadedly connected to the top of the bottom plate 602. A threaded groove is opened inside the connecting rectangular plate 611. A threaded hole with the same diameter as the threaded groove is opened on the top of the bottom plate 602. The fixing bolt 612 is threadedly connected to the inside of the connecting rectangular plate 611. A through slot is opened inside the top connection plate 604. A through hole identical to the through slot is opened at the top of the film body limiting frame 603. The through slot and the through hole allow the sliding rod part of the hydraulic telescopic rod 605 to move, and then drive the pressing plate 606 to move and press the head end of the film body, facilitating transmission.

[0025] The adjustment angle control assembly 7 includes a vertical frame 701, a connecting block 702, a bearing part 703, a rotating shaft rod 704, a magnetic attraction block 705, a magnet ring part 706, and a connecting thin rod 707. The vertical frame 701 is fixedly connected to the top of the processing table 1. The connecting block 702 is fixedly connected to the top of the vertical frame 701. The bearing part 703 is fixedly connected to the side of the connecting block 702. The rotating shaft rod 704 is fixedly connected to the side of the annular heating and jetting cavity 504. The magnetic attraction block 705 is fixedly connected to the right side of the rotating shaft rod 704. A connecting part is fixedly connected to the top side of the connecting block 702. The connecting thin rod 707 is fixedly connected to the right side of the connecting part. The magnet ring part 706 is fixedly connected to the right side of the connecting thin rod 707. The magnetic attraction block 705 is slidably connected to the inner ring of the magnet ring part 706. The magnetic attraction block 705 is magnetically connected to the magnet ring part 706. The rotating shaft rod 704 passes through the connecting block 702 and extends to be connected to the inner ring of the bearing part 703.

[0026] During use, the feed box door 4 can be pulled upward to open the film feed chute inside the processing box part 3. Then, the film is inserted into the inside of the processing box part 3, and the head end is passed through the film body limiting frame 603. When passing through, the center of the film body needs to be aligned with the center of the film body limiting frame 603. At this time, when the width of the film body is insufficient, there will be a gap between both ends and the inner sides of the film body limiting frame 603. Then, the sliding plate 610 can be held, and the sliding plate 610 is moved in the direction of approaching each other. The inner telescopic adjustment block 608 is pulled out from the inside of the telescopic frame 607, and then the adjustment belt 609 is pulled until the approaching side of the sliding plate 610 is aligned with the side surface of the film body. Then, the position of the sliding plate 610 can be fixed by using the fixing bolt 612. A width limiting component is set to ensure that the distance between the sliding plates 610 is adapted to the width of the film body, and limit the film body during transmission to ensure stable transmission. Then, the film body can be heat-shrunk by using the guiding heat-shrinking component 5 inside the feed box door 4. Gas is blown into the inside of the annular heating jet cavity 504 through the hollow plate 502. A heating component is arranged on the surface of the annular heating jet cavity 504. The heating wire 508 is started to heat on the surface of the annular heating jet cavity 504. The heating wire 508 is spirally distributed to ensure uniform heat dissipation. An insulating material 509 is covered on the outer layer of the heating wire 508 to reduce heat loss to the outside and improve energy utilization efficiency. Heat preservation treatment is carried out in cooperation with the surface heat preservation ring block 506 and the inner heat preservation pad 507. Then, the hot gas can be ejected downward through the hot gas outlet pipe 510, and finally the hot gas is sent out through the air outlet head 512 and the jet holes 513 opened on the surface. The hot air is sprayed onto the packaging film at high speed through the jet holes under the action of pressure, so that the film is quickly heated and shrunk. During use, the orientation of the air outlet head 512 can be adjusted to perform heat-shrinking treatment on the film at different positions. During adjustment, the annular heating jet cavity 504 can be held and swung for adjustment. During the adjustment process, the telescopic pipe part 503 is stretched or compressed. During adjustment, the rotating shaft rod 704 can be driven to rotate, and the magnetic attraction block 705 is driven to rotate synchronously, and slides along the inner ring of the magnet ring part 706. After adjustment, due to the magnetic attraction contact between the magnetic attraction block 705 and the magnet ring part 706, it can be magnetically locked without external force, and it is convenient to know the adjustment angle, so that the hot air can be concentrated and sprayed onto the key parts where the film needs to shrink, such as the corners and edges of the article, for concentrated heat-shrinking, and quickly perform heat-shrinking on different positions of the film. The effect during use is good, and the hot gas guide plate 514 is made of a light and heat-resistant metal or ceramic material, and the surface is specially treated, with low roughness and high reflectivity, and can effectively guide the direction of the hot air flow.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jet heat shrink packaging machine, comprising a processing table (1), characterized in that: A connecting shell (2) is arranged on the right side of the top of the processing table (1), a processing box (3) is arranged on the left side of the top of the processing table (1), a feed box door (4) is hinged on the left side of the processing box (3), a guide heat shrink component (5) is arranged inside the processing box (3), an adjustable film transmission component (6) is arranged on the top of the processing table (1), and an angle adjustment control component (7) is arranged on the surface of the guide heat shrink component (5); The guided heat shrink assembly (5) comprises a connecting box (501), a hollow plate (502), a telescopic pipe (503), an annular heating jet chamber (504), an jet end (505), a surface insulation ring block (506), an inner insulation pad (507), a heating wire (508), an insulating material (509), a hot air outlet pipe (510), a telescopic connecting pipe body (511), an air outlet head (512), a jet hole (513) and a hot air guide plate (514). The connecting box (501) is fixedly connected to the top right side of the feed box door (4), the hollow plate (502) is fixedly connected to the left side of the connecting box (501), the telescopic pipe (503) is fixedly connected to the left side of the hollow plate (502), the annular heating jet chamber (504) is fixedly connected to the left side of the telescopic pipe (503), and the jet end (505) is fixedly connected to the annular heating The surface insulation ring block (506) is fixedly connected to the surface of the annular heating jet chamber (504), the inner insulation pad (507) is fixedly connected to the inside of the surface insulation ring block (506), the bottom end of the inner insulation pad (507) is connected to the surface of the annular heating jet chamber (504), the heating wire (508) is fixedly connected to the surface of the annular heating jet chamber (504), the insulation material (509) is fixedly connected to the surface of the heating wire (508), the hot air outlet pipe (510) is fixedly connected to the left side of the jet end (505), the telescopic connecting pipe body (511) is fixedly connected to the bottom of the hot air outlet pipe (510), the air outlet head (512) is fixedly connected to the bottom of the telescopic connecting pipe body (511), and the hot air guide plate (514) is connected to the front and back sides of the inner wall of the feed box door (4) near the left side.

2. The jet heat shrink packaging machine according to claim 1, characterized in that: The adjustable membrane transmission assembly (6) comprises a transmission belt (601), a bottom plate (602), a membrane limiting frame (603), a top connecting plate (604), a hydraulic telescopic rod (605), a pressing plate (606), a telescopic frame (607), an inner telescopic adjustment block (608), an adjustment belt (609), a sliding plate (610), a connecting rectangular plate (611) and a fixing bolt (612). A driving assembly is arranged on the inner front side of the feed box door (4). The transmission belt (601) is arranged at the inner bottom end of the feed box door (4). The bottom plate (602) is fixedly connected to the top left side of the transmission belt (601). The membrane limiting frame (603) is fixedly connected to the top of the bottom plate (602). A membrane passing groove is arranged inside the membrane limiting frame (603). The top connecting plate (604) is provided with a membrane passing groove. The plate (604) is fixedly connected to the top of the membrane limit frame (603), the hydraulic telescopic rod (605) is fixedly connected to the top of the top connecting plate (604), the pressing plate (606) is fixedly connected to the bottom of the hydraulic telescopic rod (605), the telescopic frame (607) is fixedly connected to the top of the bottom plate (602) near the side, the inner telescopic adjustment block (608) is connected to the inside of the telescopic frame (607), the adjustment belt (609) is fixedly connected to the end of the inner telescopic adjustment block (608) away from the telescopic frame (607), the sliding plate (610) is fixedly connected to the side of the adjustment belt (609), the connecting moment plate (611) is fixedly connected to the front bottom of the sliding plate (610), and the fixing bolt (612) is threadedly connected to the top of the bottom plate (602).

3. The jet-type heat shrink packaging machine according to claim 2, characterized in that: The angle adjustment control assembly (7) comprises a stand (701), a connecting block (702), a bearing member (703), a rotating shaft (704), a magnetic block (705), a magnet ring member (706) and a connecting thin rod (707), wherein the stand (701) is fixedly connected to the top of the processing table (1), the connecting block (702) is fixedly connected to the top of the stand (701), the bearing member (703) is fixedly connected to the side of the connecting block (702), the rotating shaft (704) is fixedly connected to the side of the annular heating jet chamber (504), the magnetic block (705) is fixedly connected to the right side of the rotating shaft (704), the top side of the connecting block (702) is fixedly connected with a connecting member, the connecting thin rod (707) is fixedly connected to the right side of the connecting member, and the magnet ring member (706) is fixedly connected to the right side of the connecting thin rod (707).

4. The jet-type heat shrink packaging machine according to claim 3, characterized in that: The surface of the gas outlet head (512) is provided with eight groups of hollow blocks distributed in an annular manner, and the gas injection holes (513) are provided on the surface of the hollow blocks.

5. The jet-type heat shrink packaging machine according to claim 4, characterized in that: The interior of the surface insulation ring block (506) is a hollow structure.

6. The jet-type heat shrink packaging machine according to claim 5, characterized in that: A through slot is provided inside the top connection plate (604), and a through hole identical to the through slot is provided at the top of the membrane limiting frame (603).

7. The jet heat shrink packaging machine according to claim 6, characterized in that: The magnetic attraction block (705) is slidably connected to the inner ring of the magnet ring (706), the magnetic attraction block (705) is magnetically connected to the magnet ring (706), and the rotating shaft (704) passes through the connecting block (702) and extends to be connected to the inner ring of the bearing (703).

8. The jet-type heat shrink packaging machine according to claim 7, characterized in that: A thread groove is provided inside the connecting rectangular plate (611), a thread hole having a diameter equal to that of the thread groove is provided on the top of the bottom plate (602), and the fixing bolt (612) is threadedly connected to the inside of the connecting rectangular plate (611).

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