Heat sealing machine for inner bottom of packaging barrel

Abstract

According to the inner bottom heat sealing machine of the packaging barrel, manual operation is simplified, only a container body needs to be manually fed, other procedures are all mechanically completed, the automation degree is high, and the production efficiency is improved. The inner bottom heat sealing machine of the packaging barrel comprises a machine table, a rotating disc, a feeding unit, a bottom sealing unit, a spinning unit and a discharging unit, the rotating disc is rotationally matched with the machine table and is provided with a plurality of jigs; the feeding unit comprises a feeding support, a material table which ascends and descends relative to the feeding support, and a feeding mechanical arm which horizontally moves in the radial direction of the rotating disc. The bottom sealing unit comprises a bottom sealing support, a bottom sealing outer mold and a heating inner mold, wherein the bottom sealing outer mold and the heating inner mold synchronously ascend and descend relative to the bottom sealing support. The spinning unit comprises a spinning support, a spinning outer die and a spinning assembly, wherein the spinning outer die and the spinning assembly synchronously ascend and descend relative to the spinning support. The discharging unit comprises a discharging support and a discharging mechanical arm which conducts lifting movement relative to the discharging support and horizontally moves in the radial direction of the rotating disc.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging barrel production, in particular to an inner bottom heat sealing machine for a packaging barrel. Background Art

[0002] Traditional food packaging barrels are mostly made of rolled cardboard, with two types: with and without bottom rim. The former has high structural strength but a more complicated manufacturing process, while the latter saves materials and is easier to process, but has slightly lower structural strength. Figure 1 The packaging barrel of the structure shown is composed of a container body a, an inner bottom b and an outer bottom c. The container body 1 can be a barrel body or a cover body. The inner bottom b and the outer bottom c are both bonded to the container body a by hot-melt bonding. By hot-melt bonding the two bottom surfaces of the inner bottom b and the outer bottom c on the container body a, and leaving a cavity d between the inner bottom b and the outer bottom c, the purpose of heat preservation can be achieved and material costs can be saved.

[0003] For the packaging barrels with the above structure, a production mode combining manual labor and machine is currently adopted. Especially when heat-sealing the inner bottom b, it is necessary to manually place the container body a and the inner bottom b under the heat sealer in sequence, and then take them out after heat sealing by the heat sealer. There is a risk of scalding when manually loading and unloading materials at the work station of the heat sealer, and the production efficiency is not high. Utility Model Content

[0004] The utility model aims to provide a heat sealing machine for the inner bottom of a packaging barrel, which solves the problems existing in the prior art. Manual workers only need to load the container body, and the remaining processes are completed by the machine, with a high degree of automation and improved production efficiency.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A packaging barrel inner bottom heat sealing machine comprises a machine platform, and a rotating disk, a loading unit, a bottom sealing unit, a spinning unit and a discharging unit installed on the upper surface of the machine platform; the rotating disk is rotatably matched with the machine platform, and a plurality of jigs are arranged on its upper surface; the outer diameter of the jig matches the inner diameter of the container body; the loading unit, the bottom sealing unit, the spinning unit and the discharging unit are arranged on the side of the rotating disk in sequence along the circumferential direction of the rotating disk; the loading unit comprises a loading bracket, a material platform that moves up and down relative to the loading bracket, and a loading robot arm that moves horizontally along the radial direction of the rotating disk; the material platform is used for stacking coated food white cards; the bottom sealing unit comprises a bottom sealing bracket and a bottom sealing unit relative to the bottom sealing bracket The bracket performs synchronous lifting and lowering movement of a bottom cover outer mold and a heating inner mold; the bottom cover outer mold has an inner diameter that matches the outer diameter of the container body; the heating inner mold is coaxially arranged with the bottom cover outer mold and is used for hot-melt coated food paper, and a gap is reserved between its circumference and the inner wall of the bottom cover outer mold for the container body to enter; the spinning unit comprises a spinning bracket and a spinning outer mold and a spinning assembly that perform synchronous lifting and lowering movement relative to the spinning bracket; the spinning outer mold has an inner diameter that matches the outer diameter of the container body; the spinning assembly is provided with a roller that rolls and fits on the inner wall of the spinning outer mold; the unloading unit comprises a unloading bracket and an unloading robot arm that performs lifting and lowering movement relative to the unloading bracket and performs horizontal movement along the radial direction of the rotating disk.

[0007] The bottom cover unit also includes a bottom cover lifting seat that can be lifted and lowered relative to the bottom cover bracket, and a bottom cover driving cylinder for driving the bottom cover lifting seat; the bottom cover outer mold and the heating inner mold are installed on the bottom cover lifting seat.

[0008] Preferably, the bottom cover unit further comprises a bottom cover Z-axis guide rail arranged on the side of the bottom cover bracket along the up-down direction; the bottom cover lifting seat is slidably fitted on the bottom cover Z-axis guide rail.

[0009] Preferably, the bottom cover outer mold is provided with a bottom cover inner cavity; the heating inner mold includes a bottom cover inner mold coaxially arranged and connected in the bottom cover inner cavity, and a heating component arranged on the circumferential surface of the bottom cover inner mold, and the gap is reserved between the circumferential surface of the heating component and the bottom cover inner cavity.

[0010] The spinning unit also includes a spinning Z-axis guide rail arranged on the side of the spinning bracket along the up and down direction, and a spinning lifting seat slidably matched on the spinning Z-axis guide rail; the spinning outer mold and the spinning assembly are both installed on the spinning lifting seat.

[0011] Preferably, a wire shaft motor is installed on the top of the spinning bracket, and the output end of the wire shaft motor is transmission-connected to the spinning lifting seat.

[0012] Preferably, the spinning assembly includes a spinning shaft rotatably connected to the spinning lifting seat, a linkage rocker arm swingably connected to the spinning shaft in the middle, a spinning drive motor for driving the spinning shaft to rotate, and a spinning drive cylinder for driving one end of the linkage rocker arm to swing up and down; the roller is installed at the other end of the linkage rocker arm.

[0013] The jig includes a jig seat fixed relatively to the rotating disk, and a buffer plate elastically fitted on the upper surface of the jig seat, and the buffer plate is used to support the coated food white card; there are five jigs on the rotating disk, and they are arranged at equal angles around the axis of the rotating disk; the loading unit, the bottom sealing unit, the spinning unit and the unloading unit are arranged in sequence along the circumferential direction of the rotating disk and correspond to a jig respectively, and one jig is left for manually placing the container body without a bottom seal.

[0014] The loading unit also includes a loading Z-axis guide rail arranged on the side of the loading bracket along the up and down direction, and a loading R guide rail arranged on the top of the loading bracket along the radial direction of the rotating disk; the material table slides on the loading Z-axis guide rail; the loading robot arm slides on the loading R guide rail.

[0015] The unloading unit also includes a unloading R guide rail arranged on the top of the unloading bracket along the radial direction of the rotating disk, a unloading movable seat slidingly engaged with the unloading R guide rail, and a unloading driving cylinder installed on the unloading movable seat, and the unloading robot arm is installed at the output end of the unloading driving cylinder.

[0016] After adopting the above technical solution, the utility model has the following technical effects:

[0017] The utility model uses a jig on a rotating disk to feed each mechanical unit, and the loading unit, the bottom sealing unit, the spinning unit and the unloading unit sequentially execute the processes of placing the coated food white card on the top of the container body, pressing the coated food white card into the container body and heat-sealing it, applying pressure again to strengthen the bonding, and unloading the finished product after the bottom sealing is completed from the inner bottom heat sealing machine. The overall process can be cyclically carried out with a high degree of automation, and the production efficiency is greatly improved. Manual labor only needs to put the unsealed container body on the empty jig, with low labor intensity and no contact with high temperature, and production safety is guaranteed. Even the action of putting the container body can be replaced by mechanical execution, and the degree of automation is higher. The utility model uses the bottom sealing unit and the spinning unit to press the inner bottom of the packaging barrel twice after heat sealing, so as to ensure the bonding degree between the inner bottom and the container body, and greatly improve the leak-proof performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the packaging barrel structure;

[0019] Figure 2 It is a three-dimensional diagram of a specific embodiment of the utility model;

[0020] Figure 3 It is a three-dimensional diagram of a feeding unit according to a specific embodiment of the utility model;

[0021] Figure 4 The three-dimensional back cover unit of the specific embodiment of the utility model Figure 1 ;

[0022] Figure 5 The three-dimensional back cover unit of the specific embodiment of the utility model Figure 2 ;

[0023] Figure 6 The three-dimensional spinning unit of the specific embodiment of the utility model Figure 1 ;

[0024] Figure 7 The three-dimensional spinning unit of the specific embodiment of the utility model Figure 2 ;

[0025] Figure 8 It is a three-dimensional diagram of a discharging unit of a specific embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of a white card for coated food;

[0027] Description of Figure Numbers:

[0028] 1-Machine;

[0029] 2-Rotating disk; 21-Jig; 211-Jig seat; 212-Buffer plate;

[0030] 3-feeding unit; 31-feeding bracket; 32-feeding table; 321-feeding lifting plate; 322-L-shaped bracket; 33-feeding mechanical arm; 34-feeding Z-axis guide rail; 35-feeding R-axis guide rail;

[0031] 4- bottom cover unit; 41- bottom cover bracket; 42- bottom cover outer mold; 421- bottom cover inner cavity; 43- bottom cover inner mold; 431- bottom cover inner mold; 432- heating assembly; 44- bottom cover lifting seat; 45- bottom cover driving cylinder; 46- bottom cover Z axis guide rail; 47- heat insulation board;

[0032] 5-spinning unit; 51-spinning bracket; 52-spinning outer mold; 53-spinning assembly; 531-roller; 532-spinning shaft; 533-linked swing rod; 534-spinning drive motor; 535-spinning drive cylinder; 54-spinning Z-axis guide rail; 55-spinning lifting seat; 56-suspender rod; 57-spindle motor;

[0033] 6-unloading unit; 61-unloading bracket; 62-unloading mechanical arm; 63-unloading R guide rail; 64-unloading movable seat; 65-unloading driving cylinder;

[0034] a-container body; b-inner bottom; c-outer bottom; d-cavity; e-white card for coated food; f-gap; g-inner fold. DETAILED DESCRIPTION

[0035] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0036] refer to Figures 1 to 9 As shown, the utility model discloses a bottom heat sealing machine for packaging barrels, comprising a machine platform 1, and mechanical units such as a rotating disk 2, a loading unit 3, a bottom sealing unit 4, a spinning unit 5 and a discharging unit 6 installed on the upper surface of the machine platform 1;

[0037] The rotating disk 2 is rotated in cooperation with the machine table 1 and driven by a motor or other device. A plurality of jigs 21 are arranged on its upper surface. The outer diameter of the jigs 21 matches the inner diameter of the container body a to fix the container body a, and the top surface of the jigs 21 is used to support the coated food white card e (see Fig. 9 ); the feeding unit 3, the bottom sealing unit 4, the spinning unit 5 and the unloading unit 6 are sequentially arranged on the side of the rotating disk 2 along the circumferential direction of the rotating disk 2;

[0038] The loading unit 3 includes a loading bracket 31 arranged on the side of the rotating disk 2, a loading platform 32 that moves up and down relative to the loading bracket 31, and a loading robot arm 33 that moves horizontally along the radial direction of the rotating disk 2; the loading platform 32 is used to stack the coated food white cards e;

[0039] The bottom cover unit 4 comprises a bottom cover support 41 arranged at the side of the rotating disk 2, and a bottom cover outer mold 42 and a heating inner mold 43 which are synchronously lifted and lowered relative to the bottom cover support 41; the bottom cover outer mold 42 has an inner diameter matching the outer diameter of the container body a; the heating inner mold 43 is coaxially arranged with the bottom cover outer mold 42 and is used for hot-melt coated food paper, and a gap f is reserved between the peripheral surface and the inner wall of the bottom cover outer mold 42 for the container body a to enter (see Figure 5 ), so that the coated food white card e placed on the top of the container body a by the feeding unit 3 is pressed into the container body a and forms an inner fold g, and the inner fold g and the coated food paper on the inner wall of the container body a are hot-melt-bonded by the heated inner mold 43;

[0040] The spinning unit 5 includes a spinning support 51 arranged on the side of the rotating disk 2, and a spinning outer die 52 and a spinning assembly 53 that are synchronously lifted and lowered relative to the spinning support 51; the spinning outer die 52 has an inner diameter that matches the outer diameter of the container body a; the spinning assembly 53 is provided with a roller 531 that rolls on the inner wall of the spinning outer die 52, and the roller 531 is used to provide pressure to press the inner fold g against the inner wall of the container body a;

[0041] The unloading unit 6 includes an unloading bracket 61 arranged on the side wall of the rotating disk 2, and an unloading robot arm 62 that moves up and down relative to the unloading bracket 61 and moves horizontally along the radial direction of the rotating disk 2, and is used to transfer the packaging barrel with the bottom sealed on the fixture 21 to the conveyor belt and connect it to the subsequent process.

[0042] Through the above scheme, the utility model feeds each mechanical unit through the fixture 21 on the rotating disk 2, and the loading unit 3, the bottom sealing unit 4, the spinning unit 5 and the unloading unit 6 sequentially execute the processes of placing the coated food white card e on the top of the container body a, pressing the coated food white card e into the container body a and heat-sealing, applying pressure again to strengthen the bonding, and unloading the finished product after the bottom sealing from the inner bottom heat sealing machine. The overall process can be cyclically carried out with a high degree of automation, and the production efficiency is greatly improved. Manual labor only needs to put the unsealed container body a on the empty fixture 21, with low labor intensity and no contact with high temperature, and production safety is guaranteed. Even the action of putting the container body a can be replaced by mechanical execution, with a higher degree of automation. The utility model performs two compressions on the inner bottom b of the packaging barrel after heat sealing through the bottom sealing unit 4 and the spinning unit 5 to ensure the bonding degree between the inner bottom b and the container body a, greatly improving the leakage-proof performance of the product.

[0043] Specific embodiments of the present utility model are shown below.

[0044] The fixture 21 includes a fixture seat 211 fixed relatively to the rotating disk 2, and a buffer plate 212 elastically fitted on the upper surface of the fixture seat 211 through accessories such as springs, for supporting the coated food white card e. The buffer plate 212 can provide a certain buffer distance when the fixture 21 is under pressure, so as to press the coated food white card e into the container body a.

[0045] In this embodiment, there are five jigs 21 on the rotating disk 2, which are arranged at equal angles around the axis of the rotating disk 2, that is, one jig 21 is arranged every 72°; the loading unit 3, the bottom sealing unit 4, the spinning unit 5 and the unloading unit 6 are arranged in sequence along the counterclockwise direction of the rotating disk 2 and correspond to one jig 21 respectively, that is, four jigs 21 correspond to four units respectively, and the remaining jig 21 is used as a manual loading station to place the container body a without bottom sealing. During production, the rotating disk 2 stops for a certain working time after rotating 72°, so that the mechanical units corresponding to each jig 21 can perform their respective functions.

[0046] The rotating shaft of the rotating disk 2 can be driven by a stepping motor, and the rotation angle of the rotating disk 2 can be accurately controlled to ensure that the fixture 21 moves into place.

[0047] In this embodiment, the bottom cover outer mold 42 is barrel-shaped, and the spinning outer mold 52 is ring-shaped.

[0048] See also Figure 3 , is a feeding unit 3 of the utility model, which includes the above-mentioned feeding bracket 31, material table 32 and feeding robot arm 33, as well as a feeding Z-axis guide rail 34 arranged on the side of the feeding bracket 31 along the up and down direction, and a feeding R guide rail 35 arranged on the top of the feeding bracket 31 along the radial direction of the rotating disk 2; the material table 32 is slidably matched on the feeding Z-axis guide rail 34, and is driven by a driving device such as a motor, a cylinder or a hydraulic cylinder that can output linear reciprocating motion to achieve lifting and moving, or the feeding Z-axis guide rail 34 itself adopts a linear motor, so that the coated food white card e on the material table 32 can be at the top After the coated food white card e is taken away, it rises to a height where it can be grabbed / absorbed by the feeding robot arm 33; the feeding robot arm 33 can be a suction cup or a robot arm with a suction cup, and is slidably fitted on the feeding R guide rail 35, and is driven by a driving device that can output linear reciprocating motion, such as a motor, a cylinder or a hydraulic cylinder, to achieve horizontal movement, or the feeding R guide rail 35 itself adopts a linear motor, so that the feeding robot arm 33 can move back and forth between the material table 32 and the top of the fixture 21, so as to transfer the coated food white card e on the material table 32 to the top of the container body a on the fixture 21. In this embodiment, the above-mentioned material table 32 includes a feeding lifting plate 321 that is slidably fitted on the feeding Z-axis guide rail 34, and a pair of L-shaped brackets 322 fixedly connected to the feeding lifting plate 321, and the L-shaped brackets 322 are used for stacking and placing the coated food white cards e.

[0049] See also Figure 4 and Figure 5, is the bottom cover unit 4 of the utility model, which includes the above-mentioned bottom cover bracket 41, bottom cover outer mold 42 and heating inner mold 43, as well as a bottom cover lifting seat 44 that can be lifted and lowered relative to the bottom cover bracket 41, and a bottom cover driving cylinder 45 for driving the bottom cover lifting seat 44; the bottom cover outer mold 42 and the heating inner mold 43 are installed on the bottom cover lifting seat 44.

[0050] Furthermore, the above-mentioned bottom cover unit 4 also includes a bottom cover Z-axis guide rail 46 arranged on the side of the bottom cover bracket 41 along the up and down direction; the bottom cover lifting seat 44 is slidably fitted on the bottom cover Z-axis guide rail 46, and is driven by a driving device such as a motor, cylinder or hydraulic cylinder that can output linear reciprocating motion to achieve lifting and lowering movement, or the bottom cover Z-axis guide rail 46 itself adopts a linear motor.

[0051] At the same time, the above-mentioned bottom cover outer mold 42 is provided with a bottom cover inner cavity 421, and the heating inner mold 43 includes a bottom cover inner mold 431 coaxially arranged and connected in the bottom cover inner cavity 421, and a heating component 432 annularly arranged on the circumference of the bottom cover inner mold 431, and the above-mentioned gap f is reserved between the circumference of the heating component 432 and the bottom cover inner cavity 421.

[0052] In addition, a heat insulation board 47 is provided on the upper surface of the bottom cover outer mold 42 to improve the safety performance of the machine.

[0053] See also Figure 6 and Figure 7 , is a spinning unit 5 of the utility model, which includes the above-mentioned spinning bracket 51, spinning outer mold 52 and spinning assembly 53, as well as a spinning Z-axis guide rail 54 arranged on the side of the spinning bracket 51 along the up-down direction, a spinning lifting seat 55 slidably fitted on the spinning Z-axis guide rail 54, and the spinning lifting seat 55 is driven by a driving device such as a motor, a cylinder or a hydraulic cylinder that can output linear reciprocating motion, or the spinning Z-axis guide rail 54 itself adopts a linear motor; the spinning outer mold 52 and the spinning assembly 53 are both installed on the spinning lifting seat 55 to achieve synchronous lifting and moving. In this embodiment, the above-mentioned spinning outer mold 52 and the spinning lifting seat 55 are connected by a plurality of suspension rods 56 arranged along the up-down direction.

[0054] Furthermore, a wire shaft motor 57 is installed on the top of the above-mentioned spinning bracket 51, and the output end of the wire shaft motor 57 is transmission-connected to the spinning lifting seat 55 for accurately driving and controlling the lifting height of the spinning lifting seat 55, and can accurately adjust the height of the spinning outer mold 52 and the spinning assembly 53.

[0055] Meanwhile, the spinning assembly 53 comprises a spinning shaft 532 rotatably connected to the spinning lifting seat 55, a linkage swing rod 533 swingably connected to the spinning shaft 532 in the middle, a spinning driving motor 534 for driving the spinning shaft 532 to rotate, and a spinning driving cylinder 535 for driving one end of the linkage swing rod 533 to swing up and down; the roller 531 is mounted on the other end of the linkage swing rod 533. When the spinning driving motor 534 is working, the roller 531 can move in a circle through the linkage swing rod 533 and the spinning shaft 532 synchronously, and the spinning driving cylinder 535 can control whether the roller 531 presses the inner fold g by controlling the swing of the linkage swing rod 533.

[0056] Secondly, the rotating shaft 532 and the spinning driving motor 534 can be transmitted via a reduction gear set to reduce the rotation speed of the rotating shaft 532 and increase the torque.

[0057] See also Figure 8 , is the unloading unit 6 of the utility model, which includes the above-mentioned unloading bracket 61 and unloading mechanical arm 62, as well as a unloading R guide rail 63 arranged on the top of the unloading bracket 61 along the radial direction of the rotating disk 2, a unloading movable seat 64 slidingly fitted on the unloading R guide rail 63 and an unloading driving cylinder 65 installed on the unloading movable seat 64, the unloading mechanical arm 62 is a suction cup or a mechanical arm with a suction cup and is installed at the output end of the unloading driving cylinder 65; the unloading movable seat 64 is driven by a driving device such as a motor, a cylinder or a hydraulic cylinder that can output linear reciprocating motion, or the unloading R guide rail 63 itself adopts a linear motor, so that the unloading mechanical arm 62 can move back and forth between the top of the fixture 21 and the conveyor belt of the production line to realize the transfer of the packaging barrel with the bottom sealed to the subsequent process.

[0058] The use and production process of this utility model is:

[0059] (1) Manually placing the unsealed container body a on the empty fixture 21;

[0060] (2) The rotating disk 2 rotates toward the rear process by a certain angle, and the container body a is transferred to the bottom of the loading unit 3; the loading robot arm 33 of the loading unit 3 grabs a piece of coated food white card e and puts it on the top of the container body a, and ensures that the coated food white card e is coaxial with the container body a;

[0061] (3) The rotating disk 2 rotates a certain angle again to transfer the container body a with the coated food white card e to the bottom of the bottom sealing unit 4; the bottom sealing outer mold 42 and the heated inner mold 43 of the bottom sealing unit 4 descend simultaneously, the bottom sealing outer mold 42 is put on the surface of the container body a, and the heated inner mold 43 contacts the coated food white card e and presses it into the container body a. After the heated inner mold 43 is heated, the coated food white card e and the coated food paper on the inner wall of the container body a are hot-melt-bonded, completing the primary heat sealing;

[0062] (4) The rotating disk 2 rotates a certain angle again to transfer the semi-finished product after the initial heat sealing to the bottom of the spinning unit 5; the spinning outer mold 52 and the spinning assembly 53 of the spinning unit 5 descend simultaneously, the spinning outer mold 52 is put on the surface of the container body a, and the roller 531 of the spinning assembly 53 rolls along the inner wall of the inner fold g of the inner bottom b and presses the inner fold g tightly against the inner wall of the container body a, thereby completing the reinforcement of the inner fold g;

[0063] (5) The rotating disk 2 rotates a certain angle again to transfer the finished product after the secondary reinforcement to the unloading unit 6, which unloads the product. The corresponding fixture 21 is emptied and manually loaded after the rotating disk 2 rotates a certain angle next time, returning to the above step (1) to carry out cyclic production.

[0064] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A heat sealer for the inner bottom of a packaging barrel, characterized in that: It includes a machine platform, and a rotating disk, a loading unit, a bottom sealing unit, a spinning unit and a discharging unit installed on the upper surface of the machine platform; The rotating disk is rotatably matched with the machine platform, and a plurality of jigs are arranged on its upper surface; the outer diameter of the jigs matches the inner diameter of the container body; the loading unit, the bottom sealing unit, the spinning unit and the unloading unit are arranged in sequence on the side of the rotating disk along the circumferential direction of the rotating disk; The feeding unit comprises a feeding support, a feeding table that moves up and down relative to the feeding support, and a feeding mechanical arm that moves horizontally along the radial direction of the rotating disk; the feeding table is used to stack coated food white cards; The bottom cover unit comprises a bottom cover support, and a bottom cover outer mold and a heating inner mold which are synchronously lifted and lowered relative to the bottom cover support; the bottom cover outer mold has an inner diameter matching the outer diameter of the container body; the heating inner mold is coaxially arranged with the bottom cover outer mold and is used for hot-melt coated food paper, and a gap is reserved between the peripheral surface and the inner wall of the bottom cover outer mold for the container body to enter; The spinning unit comprises a spinning support, a spinning outer die and a spinning assembly which are synchronously lifted and lowered relative to the spinning support; the spinning outer die has an inner diameter matching the outer diameter of the container body; the spinning assembly is provided with a roller which rolls and fits on the inner wall of the spinning outer die; The unloading unit comprises a unloading support and a unloading mechanical arm which moves up and down relative to the unloading support and moves horizontally along the radial direction of the rotating disk.

2. The inner bottom heat sealing machine of the packaging barrel according to claim 1, characterized in that: The bottom cover unit also includes a bottom cover lifting seat that can be lifted and lowered relative to the bottom cover bracket, and a bottom cover driving cylinder for driving the bottom cover lifting seat; the bottom cover outer mold and the heating inner mold are installed on the bottom cover lifting seat.

3. The inner bottom heat sealing machine of the packaging barrel according to claim 2, characterized in that: The bottom cover unit also includes a bottom cover Z-axis guide rail arranged on the side of the bottom cover bracket along the up-down direction; the bottom cover lifting seat is slidably fitted on the bottom cover Z-axis guide rail.

4. The inner bottom heat sealing machine of the packaging barrel according to claim 2, characterized in that: The bottom cover outer mold is provided with a bottom cover inner cavity; the heating inner mold includes a bottom cover inner mold coaxially arranged and connected in the bottom cover inner cavity, and a heating component arranged on the circumference of the bottom cover inner mold, and the gap is reserved between the circumference of the heating component and the bottom cover inner cavity.

5. The inner bottom heat sealing machine of the packaging barrel according to claim 1, characterized in that: The spinning unit also includes a spinning Z-axis guide rail arranged on the side of the spinning bracket along the up and down direction, and a spinning lifting seat slidably matched on the spinning Z-axis guide rail; the spinning outer mold and the spinning assembly are both installed on the spinning lifting seat.

6. The inner bottom heat sealer of the packaging barrel according to claim 5, characterized in that: A wire shaft motor is installed on the top of the spinning bracket, and the output end of the wire shaft motor is transmission-connected with the spinning lifting seat.

7. The inner bottom heat sealer of a packaging barrel according to claim 5, characterized in that: The spinning assembly includes a spinning shaft rotatably connected to the spinning lifting seat, a linkage swing arm swingably connected to the spinning shaft in the middle, a spinning drive motor for driving the spinning shaft to rotate, and a spinning drive cylinder for driving one end of the linkage swing arm to swing up and down; the roller is installed at the other end of the linkage swing arm.

8. The inner bottom heat sealing machine of the packaging barrel according to claim 1, characterized in that: The jig includes a jig seat fixed relatively to the rotating disk, and a buffer plate elastically fitted on the upper surface of the jig seat, and the buffer plate is used to support the coated food white card; there are five jigs on the rotating disk, and they are arranged at equal angles around the axis of the rotating disk; the loading unit, the bottom sealing unit, the spinning unit and the unloading unit are arranged in sequence along the circumferential direction of the rotating disk and correspond to a jig respectively, and one jig is left for manually placing the container body without a bottom seal.

9. The inner bottom heat sealing machine of a packaging barrel according to claim 1, characterized in that: The loading unit also includes a loading Z-axis guide rail arranged on the side of the loading bracket along the up and down direction, and a loading R guide rail arranged on the top of the loading bracket along the radial direction of the rotating disk; the material table slides on the loading Z-axis guide rail; the loading robot arm slides on the loading R guide rail.

10. The inner bottom heat sealer of a packaging barrel according to claim 1, characterized in that: The unloading unit also includes a unloading R guide rail arranged on the top of the unloading bracket along the radial direction of the rotating disk, a unloading movable seat slidingly engaged with the unloading R guide rail, and a unloading driving cylinder installed on the unloading movable seat, and the unloading robot arm is installed at the output end of the unloading driving cylinder.

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