Structure of hot air chamber of automatic stretch film packaging machine

Abstract

The invention provides a structure of a hot air chamber of an automatic stretch film packaging machine, and relates to the technical field of special intelligent packaging equipment.The structure comprises a hot air chamber housing, two spiral push cylinders are installed above the hot air chamber housing through bolts, a heating plate is movably connected to the interior of the hot air chamber housing, and after heating is completed, the spiral push cylinders are driven by the heating plate to rotate; the heating plate and the heating connecting plate are lifted through the spiral push cylinder, so that the heating connecting plate is separated from the upper surface of the stretching film, the phenomenon that the stretching film is stretched and damaged due to extrusion of the heating connecting plate when the stretching film is stretched in the state can be avoided, the probability that the stretching film is damaged in the stretching process is reduced, and the production efficiency is improved. High-temperature airflow is jetted downwards through the clamping plate plugging opening, the high-temperature airflow is provided for the stretching film, the stretching film is continuously heated, the situation that the stretching effect is poor due to the fact that the stretching film is separated from the heating connecting plate and rapidly cooled is avoided, and the heating uniformity of the stretching film is improved in the mode that the stretching film is heated through the high-temperature airflow; and the condition that the film body is damaged due to local overheating is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of special intelligent packaging equipment, and in particular to the structure of a hot air chamber of an automatic stretch film packaging machine. Background Art

[0002] Automatic stretch film packaging machine is a kind of mechanical equipment widely used in the packaging field. It is mainly used to wrap products in stretch film to achieve the sealing, protection and beauty of the products. The working principle of the stretch film packaging machine is based on the stretching and contraction of the film. The full-automatic stretch film vacuum packaging machine is mainly composed of a vacuum system, a vacuum sealing system, a hot pressing sealing system, an electrical control system, etc. The stretch film passes through the heating chamber driven by the conveying mechanism, and the stretch film is heated by the heating chamber. Then the stretch film is stretched to a set shape through the mold and the negative pressure control mechanism, and the packaged product is loaded into the formed lower film cavity for vacuum packaging.

[0003] In a traditional stretch film packaging machine, the stretch film is heated by a heating chamber. An electric heating plate is provided inside the heating chamber. The stretch film is heated by direct contact between the electric heating plate and the stretch film. After the heating is completed, the air pressure inside the mold is reduced to cause the stretch film to deform and stretch toward the inside of the mold. Since the stretch film is in contact with the heating plate, the stretch film may be overheated or squeezed, resulting in damage during the stretching process, affecting the stretch film molding effect and the sealing of the packaging. Summary of the invention

[0004] The present invention relates to a structure of a hot air chamber of an automated stretch film packaging machine, so as to solve the problem that in a traditional stretch film packaging machine, the stretch film is heated by a heating chamber, an electric heating plate is arranged inside the heating chamber, and the stretch film is heated by direct contact between the electric heating plate and the stretch film. After the heating is completed, the stretch film is deformed and stretched toward the inside of the mold by reducing the air pressure inside the mold. However, due to the contact between the stretch film and the heating plate, the stretch film may be overheated or squeezed, resulting in damage during the stretching process, affecting the stretch film forming effect and affecting the sealing of the packaging.

[0005] The technical solution of the present invention is: a structure of a hot air chamber of an automatic stretch film packaging machine, specifically comprising: a hot air chamber cover, two spiral push cylinders are installed above the hot air chamber cover by bolts, a heating plate is movably connected inside the hot air chamber cover, an air guide plate is fixedly connected above the heating plate, the lower end of the push rod of the spiral push cylinder is fixedly connected to the upper surface of the air guide plate, two blocking lifting frames are movably connected above the heating plate, the blocking lifting frames are located below the air guide plate, a heating connecting plate is fixedly connected below the heating plate by bolts, and the upper surface of the heating connecting plate is tightly fitted with the lower surface of the heating plate.

[0006] Furthermore, two casing guide rods are respectively fixedly connected to the inner left wall and right wall of the hot air chamber casing by screws.

[0007] Furthermore, a guide opening is formed through the air guide plate, and a guide fan is installed inside the guide opening through a bracket.

[0008] Furthermore, four electromagnets are mounted on the lower surface of the air guide plate by screws, and four guide plate guide holes with circular hole structures are formed through the air guide plate.

[0009] Furthermore, a side connecting plate is provided on the side of the heating plate, and two side sliders are installed on the side connecting plate by screws. The side sliders are slidably connected to the guide rods of the cover shell, and a heating wire is provided inside the heating plate.

[0010] Furthermore, a circular docking socket is provided through the heating plate, and an air inlet is provided through the heating plate longitudinally.

[0011] Furthermore, the upper surface of the blocking lifting frame is fixedly connected with two lifting frame guide rods, the lifting frame guide rods are perpendicular to the upper surface of the blocking lifting frame, a lifting frame reset top spring is sleeved on the lifting frame guide rods, the lower end of the lifting frame reset top spring is fixedly connected to the upper surface of the blocking lifting frame, the upper end of the lifting frame reset top spring is fixedly connected to the lower surface of the air guide plate, and the upper surface of the blocking lifting frame is fixedly connected with two magnetically controlled iron blocks, and the magnetically controlled iron blocks are located directly below the electromagnets.

[0012] Furthermore, a grading connecting rod is commonly connected below the two blocking lifting frames, and a heat-conducting block is connected to the lower surface of the grading connecting rod by welding. The lower end of the heat-conducting block is a truncated cone structure, and the heat-conducting block is slidably connected to the docking socket.

[0013] Furthermore, the heating connecting plate is longitudinally penetrated by a clamping plate plugging opening with a truncated cone-shaped structure, the clamping plate plugging opening is movably connected to the truncated cone structure at the lower end of the heat-conducting blocking block, and an air conveying channel is opened on the upper surface of the heating connecting plate.

[0014] Furthermore, the air delivery channel is arranged in a curved structure, the splint plugs distributed in the same row are connected to the same air delivery channel, and the air inlet is located at the upper end of the air delivery channel.

[0015] The present invention provides a structure of a hot air chamber of an automatic stretch film packaging machine, which has the following beneficial effects:

[0016] The stretch film packaging machine in the present invention uses a hot air chamber with an electrically heated heating plate, which heats the heating connecting plate and heats the stretch film passing through the hot air chamber, so that the heated stretch film is more easily stretched and deformed toward the inside of the mold cavity under the negative pressure of the mold below; at the same time, a lifting control mechanism for the heating plate and the heating connecting plate is added. During the heating process of the stretch film, the heating connecting plate is in contact with the stretch film, and when the heating is completed, the heating plate and the heating connecting plate are lifted by the spiral push cylinder to separate the heating connecting plate from the upper surface of the stretch film. When the stretch film is stretched in this state, the phenomenon of stretching and breakage of the stretch film due to the extrusion of the heating connecting plate can be avoided, thereby reducing the probability of breakage of the stretch film during the stretching process.

[0017] In addition, during the process of heating the stretch film in the hot air chamber of the stretch film packaging machine of the present invention, after the heating is completed, the air guide plate, the heating plate, and the heating connecting plate are controlled by the spiral push cylinder to move up and separate from the stretch film, and the guide fan and the electromagnet are started at the same time. The electromagnet is energized to adsorb the magnetically controlled iron block, so that the sealing lifting frame together with the grading connecting rod and the heat-conducting block move up, so that the heat-conducting block moves up inside the docking socket, and the outer surface of the truncated cone part of the heat-conducting block is separated from the inner wall of the splint plug, so that the air delivery channel is connected to the splint plug, and at the same time, the guide fan is used to increase the air flow between the air guide plate and the heating plate. The air pressure allows air to enter the air delivery channel through the air inlet. In this process, the air inside the air delivery channel is heated by the heating plate and the heating connecting plate, and flows along the curved structure of the air delivery channel to the splint plugging. Finally, the high-temperature airflow is sprayed downward through the splint plugging, providing high-temperature airflow to the stretch film, so that the stretch film is continuously heated, avoiding the poor stretching effect caused by rapid cooling due to separation of the stretch film from the heating connecting plate. The high-temperature airflow heats the stretch film to improve the heating uniformity of the stretch film, avoiding local overheating and damage to the film body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 A schematic diagram showing the overall structure of the present application;

[0022] Figure 2 The structural schematic diagram at the bottom of this application is shown;

[0023] Figure 3 The schematic diagram of the structure of the hot air chamber cover after being cut open is shown;

[0024] Figure 4 It shows a schematic diagram of the structure of the heat-conducting block and the splint plugging port of the present application in a docking state;

[0025] Figure 5 It shows a schematic diagram of the structure of the present invention in which the heat-conducting blocking block and the clamping plate blocking port are separated;

[0026] Figure 6 It shows a schematic diagram of the structure of the present application in a decomposed state;

[0027] Figure 7 The schematic diagram of the structure of the heating plate of the present application is shown;

[0028] Figure 8 It shows a schematic diagram of the structure of the present application in which the heating plate and the plugging lifting frame are separated;

[0029] Fig. 9 The schematic diagram of the structure of the air guide plate of the present application is shown;

[0030] Fig.10 This application shows Figure 5 A schematic diagram of the partially enlarged structure at point A in the middle;

[0031] Fig.11 This application shows Figure 6 A schematic diagram of the partially enlarged structure at B in the middle;

[0032] Fig.12 This application shows Figure 7 Schematic diagram of the partially enlarged structure at point C in the middle.

[0033] Reference numerals list

[0034] 1. Hot air chamber cover; 101. Cover guide rod; 2. Screw push cylinder; 3. Air guide plate; 301. Guide port; 302. Guide fan; 303. Electromagnet; 304. Guide hole of guide plate; 4. Heating plate; 401. Side slider; 402. Docking socket; 403. Air inlet; 404. Heating wire; 5. Blocking lifting frame; 501. Lifting frame guide rod; 502. Lifting frame reset top spring; 503. Magnetron iron block; 504. Graded connecting rod; 505. Heat conduction block; 6. Heating connecting plate; 601. Clamp plug; 602. Air delivery channel. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1 to 12 :

[0037] The present invention proposes a structure of a hot air chamber of an automatic stretch film packaging machine, comprising: a hot air chamber cover 1, two spiral push cylinders 2 are installed above the hot air chamber cover 1 by bolts, a heating plate 4 is movably connected inside the hot air chamber cover 1, an air guide plate 3 is fixedly connected above the heating plate 4, the lower end of the push rod of the spiral push cylinder 2 is fixedly connected to the upper surface of the air guide plate 3, two blocking lifting frames 5 are movably connected above the heating plate 4, the blocking lifting frames 5 are located below the air guide plate 3, a heating connecting plate 6 is fixedly connected below the heating plate 4 by bolts, and the upper surface of the heating connecting plate 6 is tightly fitted with the lower surface of the heating plate 4.

[0038] In the disclosed embodiment, two cover guide rods 101 are respectively fixedly connected to the inner left and right walls of the hot air chamber cover 1 by screws; the air guide plate 3, the heating plate 4 and the heating connecting plate 6 are installed through the hot air chamber cover 1 to avoid leakage of hot air during operation. At the same time, a gap is provided between the inner left and right walls of the hot air chamber cover 1 and the edges of the heating connecting plate 6 and the heating plate 4, so that the high-temperature airflow can flow to the stretching film and then re-enter the interior of the hot air chamber cover 1 through the side gaps, thereby reducing energy consumption.

[0039] In the disclosed embodiment, a guide port 301 is formed through the air guide plate 3, a guide fan 302 is installed inside the guide port 301 through a bracket, four electromagnets 303 are installed on the lower surface of the air guide plate 3 through screws, and four guide plate guide holes 304 with circular hole structures are formed through the air guide plate 3; through the action of the guide fan 302, the air above the air guide plate 3 is transported to the bottom of the air guide plate 3, thereby increasing the air pressure between the air guide plate 3 and the heating plate 4, and prompting the air to enter the air transport channel 602 through the air inlet hole 403. The hot air chamber cover 1 can be made of heat-insulating material, which can effectively reduce heat loss and reduce the chance of burns to users.

[0040] In the disclosed embodiment, a side connecting plate is provided on the side of the heating plate 4, and two side sliders 401 are installed on the side connecting plate by screws. The side sliders 401 are slidably connected to the cover guide rod 101 to play a guiding role. An electric heating wire 404 is provided inside the heating plate 4; the heating plate 4 is heated by the electric heating wire 404, and the heat is transferred to the heating connecting plate 6 through the contact between the heating plate 4 and the heating connecting plate 6, so that the heating connecting plate 6 is heated to provide thermal energy for heating the stretch film.

[0041] In the embodiment of the present disclosure, a circular docking socket 402 is provided through the heating plate 4, an air inlet 403 is provided through the heating plate 4 longitudinally, two lifting frame guide rods 501 are fixedly connected to the upper surface of the blocking lifting frame 5, the lifting frame guide rods 501 are perpendicular to the upper surface of the blocking lifting frame 5, a lifting frame reset top spring 502 is sleeved on the lifting frame guide rod 501, the lower end of the lifting frame reset top spring 502 is fixedly connected to the upper surface of the blocking lifting frame 5, the upper end of the lifting frame reset top spring 502 is fixedly connected to the lower surface of the air guide plate 3, and the sliding connection between the lifting frame guide rod 501 and the guide hole 304 of the guide plate plays a guiding role. The blocking lifting frame 5 and the air guide plate 3 are always kept in a parallel state to avoid the blocking lifting frame 5 from deflecting. The lifting frame reset top spring 502 applies a downward thrust to the blocking lifting frame 5, so that the heat conductive blocking block 505 is always tightly fitted with the inner wall of the splint plug 601. Two magnetron blocks 503 are fixedly connected to the upper surface of the blocking lifting frame 5, and the magnetron block 503 is located directly below the electromagnet 303. The electromagnet 303 controls the lifting and lowering of the blocking lifting frame 5, the grading connecting rod 504 and the heat conductive blocking block 505 through magnetic force, thereby controlling the opening and closing of the airflow channel.

[0042] In the embodiment of the present disclosure, a grading connecting rod 504 is commonly connected to the lower part of the two blocking lifting frames 5, and a heat conductive blocking block 505 is connected to the lower surface of the grading connecting rod 504 by welding. The lower end of the heat conductive blocking block 505 is a truncated cone structure, and the heat conductive blocking block 505 is slidably connected to the docking socket 402; under normal conditions, when the stretch film is heated by the heating connecting plate 6 in contact with the stretch film, the blocking lifting frame 5 is pushed up by the lifting frame reset top spring 502, and the blocking lifting frame 5 is heated by the contact between the heating plate 4 and the heat conductive blocking block 505, and the bottom surface of the heat conductive blocking block 505 is flush with the lower surface of the heating connecting plate 6, so that the heating connecting plate 6 is in contact with the stretch film, and the heat conductive blocking block 505 is also in contact with the stretch film, and the stretch film located below the splint plug 601 is heated by the heat conductive blocking block 505 to avoid uneven heating of the stretch film.

[0043] Embodiment 2, on the basis of embodiment 1, the heating connecting plate 6 is longitudinally penetrated by a truncated cone-shaped splint plugging port 601, the splint plugging port 601 is movably connected to the truncated cone structure at the lower end of the heat-conducting block 505, and an air delivery channel 602 is provided on the upper surface of the heating connecting plate 6; the air delivery channel 602 is arranged in a curved structure, the splint plugging ports 601 distributed in the same row are connected to the same air delivery channel 602, and the air inlet hole 403 is located at the upper end of the air delivery channel 602; the telescopic film is stretched and deformed under the negative pressure inside the mold When the film is formed, the air guide plate 3, the heating plate 4 and the heating connecting plate 6 are controlled by the spiral push cylinder 2 to move up and separate from the stretch film, and the guide fan 302 and the electromagnet 303 are started at the same time. The electromagnet 303 is energized to adsorb the magnetic control iron block 503, so that the blocking lifting frame 5 together with the grading connecting rod 504 and the heat conductive blocking block 505 move up, so that the heat conductive blocking block 505 moves up inside the docking socket 402, and the outer surface of the truncated cone part of the heat conductive blocking block 505 is separated from the inner wall of the clamping plate blocking port 601, so that the air conveying channel 602 is separated from the clamping plate blocking port 601. The plug 601 is connected, and the air pressure between the air guide plate 3 and the heating plate 4 is increased by the guide fan 302, so that the air enters the air delivery channel 602 through the air inlet hole 403. In this process, the air inside the air delivery channel 602 is heated by the heating plate 4 and the heating connecting plate 6, and flows to the clamping plate plug 601 along the curved structure of the air delivery channel 602, and finally sprayed downward through the clamping plate plug 601, providing high-temperature airflow to the stretch film, so that the stretch film is continuously heated, and the situation that the stretch film is separated from the heating connecting plate 6 and quickly cooled, resulting in poor stretching effect, is avoided. The stretch film is heated by the high-temperature airflow. The uniformity of heating the stretch film is improved. The curved air delivery channel 602 can increase the contact between the air and the air, and the air passing through the air delivery channel 602 is effectively heated. The heating of the air by the heating plate 4 and the heating connecting plate 6 can effectively utilize the waste heat of the heating plate 4 and the heating connecting plate 6, so that the heat is applied to the stretch film, the utilization rate of heat is improved, and the energy consumption is effectively reduced.

[0044] The working principle of this embodiment is as follows: first, a hot air chamber is installed above the stretch film packaging machine, and the hot air chamber is placed above the stretching die, so that the stretch film passes between the hot air chamber and the stretching die. When packaging the product, the stretch film is pulled into the bottom of the hot air chamber cover 1 by the stretch film packaging machine, and the heating plate 4 is heated by the electric heating wire 404. The heating plate 4 transmits the temperature to the heating connecting plate 6, and the air guide plate 3, the heating plate 4, and the heating connecting plate 6 are pushed downward by the spiral push cylinder 2, so that the heated heating connecting plate 6 is in contact with the stretch film to heat the stretch film. After the heating of the stretch film is completed, the spiral push cylinder 2 is controlled to contract, and the heating plate 4 and the heating connecting plate 6 are pulled upward, and the vacuum mechanism connected to the stretching die cavity in the stretch film packaging machine is started. By reducing the air pressure in the cavity, the stretch film is deformed toward the inside of the cavity to achieve the stretching of the stretch film. At the same time, the guide fan 302 and the electromagnet 303 are started, and the magnetron iron block 503 is adsorbed by the electromagnet 303 to make the sealing rise The lowering frame 5 together with the grading connecting rod 504 and the heat-conducting blocking block 505 move upward, so that the heat-conducting blocking block 505 moves upward inside the docking socket 402, and the outer surface of the truncated cone part of the heat-conducting blocking block 505 is separated from the inner wall of the splint plug 601, so that the air delivery channel 602 is connected to the splint plug 601, and at the same time, the air pressure between the air guide plate 3 and the heating plate 4 is increased by the guide fan 302, so that the air enters the air delivery channel 602 through the air inlet hole 403. In this process, the air inside the air delivery channel 602 is heated by the heating plate 4 and the heating connecting plate 6, and flows to the splint plug 601 along the curved structure of the air delivery channel 602, and finally sprayed downward through the splint plug 601, providing high-temperature airflow to the stretch film, so that the stretch film is continuously heated, and a high-temperature airflow is generated by the airflow and the residual heat of the heating plate 4 and the heating connecting plate 6. The cooling rate of the stretch film is slowed down by the high-temperature airflow, thereby reducing the probability of poor stretching effect caused by rapid cooling due to the separation of the stretch film from the heating connecting plate 6.

[0045] In this article, there are a few points to note:

[0046] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0047] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0048] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A structure of a hot air chamber of an automated stretch film packaging machine, comprising: A hot air chamber cover (1) is characterized in that two spiral push cylinders (2) are installed on the top of the hot air chamber cover (1) by bolts, a heating plate (4) is movably connected inside the hot air chamber cover (1), an air guide plate (3) is fixedly connected above the heating plate (4), the lower end of the push rod of the spiral push cylinder (2) is fixedly connected to the upper surface of the air guide plate (3), two blocking lifting frames (5) are movably connected above the heating plate (4), the blocking lifting frames (5) are located below the air guide plate (3), a heating connecting plate (6) is fixedly connected below the heating plate (4) by bolts, and the upper surface of the heating connecting plate (6) is tightly fitted with the lower surface of the heating plate (4).

2. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 1 is characterized in that: Two casing guide rods (101) are respectively fixedly connected to the left and right inner walls of the hot air chamber casing (1) by screws.

3. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 1 is characterized in that: The air guide plate (3) is provided with a guide opening (301) extending therethrough, and a guide fan (302) is installed inside the guide opening (301) via a bracket.

4. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 1 is characterized in that: Four electromagnets (303) are mounted on the lower surface of the air guide plate (3) by means of screws, and four guide plate guide holes (304) with circular hole structures are provided through the air guide plate (3).

5. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 2, characterized in that: A side connecting plate is provided on the side of the heating plate (4), and two side sliding blocks (401) are installed on the side connecting plate by screws. The side sliding blocks (401) are slidably connected to the cover guide rod (101), and a heating wire (404) is provided inside the heating plate (4).

6. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 5, characterized in that: The heating plate (4) is provided with a circular docking socket (402) extending through it, and an air inlet hole (403) extending through it longitudinally.

7. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 4, characterized in that: The upper surface of the blocking lifting frame (5) is fixedly connected with two lifting frame guide rods (501), the lifting frame guide rods (501) are perpendicular to the upper surface of the blocking lifting frame (5), a lifting frame reset top spring (502) is sleeved on the lifting frame guide rods (501), the lower end of the lifting frame reset top spring (502) is fixedly connected to the upper surface of the blocking lifting frame (5), the upper end of the lifting frame reset top spring (502) is fixedly connected to the lower surface of the air guide plate (3), and the upper surface of the blocking lifting frame (5) is fixedly connected with two magnetron iron blocks (503), and the magnetron iron blocks (503) are located directly below the electromagnet (303).

8. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 6, characterized in that: The lower parts of the two blocking lifting frames (5) are commonly connected with a grading connecting rod (504), and the lower surface of the grading connecting rod (504) is connected with a heat-conducting blocking block (505) by welding. The lower end of the heat-conducting blocking block (505) is in a truncated cone structure, and the heat-conducting blocking block (505) is slidably connected to the docking socket (402).

9. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 8, characterized in that: The heating connecting plate (6) is longitudinally penetrated by a clamping plate plugging opening (601) with a truncated cone-shaped structure, the clamping plate plugging opening (601) is movably connected to the truncated cone structure at the lower end of the heat-conducting blocking block (505), and an air conveying channel (602) is opened on the upper surface of the heating connecting plate (6).

10. The structure of the hot air chamber of the automatic stretch film packaging machine according to claim 9, characterized in that: The air delivery channel (602) is arranged in a curved structure, the clamping plate plugs (601) distributed in the same row are connected to the same air delivery channel (602), and the air inlet (403) is located at the upper end of the air delivery channel (602).

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