A rotary outer circular surface thermal transfer production line and automatic thermal transfer method

Abstract

The present invention relates to a rotary outer cylindrical surface heat transfer production line and an automatic heat transfer method, comprising: a paper loading station, a cup wrapping station, a baking station, and a paper removal station. The paper loading station comprises a parallel and synchronously running rotary conveyor belt and a transfer paper conveyor belt, a positioning facility, a transfer paper positioning facility, an elastic fastening leather feeding device, a transfer paper feeding device, a transfer paper clamping device, an upper buckle device, a rotary end face positioning and pushing facility, a finished product conveyor belt, a buckle unloading device, and a finished product unloading device. The rotary transfer assembly comprises an elastic fastening leather and a U-shaped buckle. The conveyor belt is used to arrange the various devices for assembling the rotary transfer assembly and baking and disassembling the rotary transfer assembly together, so as to realize the continuous and automatic production of the rotary. The elastic fastening leather tightly fits the transfer paper on the rotary, so that the transferred image is clearer and more colorful. The small U-shaped buckle makes installation and disassembly more convenient, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to a thermal transfer production line and an automatic thermal transfer method for the outer circular surface of a rotating body, an intelligent automatic mechanical transmission processing production line, and a processing production line for printing text and personalized patterns on the outer circular surface of a rotating body such as a porcelain cup and a stainless steel cup. Background Art

[0002] Thermal transfer is to first print the selected pattern on a piece of transfer paper through a printer, then stick the transfer paper on the surface of the object to be transferred (for example: porcelain, stainless steel, etc.), and place the object with the transfer paper in a high temperature environment of about 200 degrees Celsius for several minutes. The special ink on the thermal transfer paper will then sublimate and adhere to the surface of the object with a resin coating that is in close contact with it, completing the thermal transfer process of a selected image from the transfer paper to the surface of the object. The image after thermal transfer is colorful, the pattern and the surface of the object are firmly combined, and the thermal transfer object becomes a highly personalized fashion item. The existing thermal transfer production of objects is to manually stick the transfer paper on the surface of the object to be transferred one by one, and then heat it to form, which has low production efficiency and low yield rate. Summary of the invention

[0003] In order to overcome the problems of the prior art, the present invention proposes a rotary outer round surface thermal transfer production line and an automatic thermal transfer method. The production line and thermal transfer method are provided with an elastic pressing device for automatically disassembling and assembling transfer paper, so that the process of thermal transfer printing of rotary outer round surface objects is fully automated, which not only improves the transfer quality, but also realizes the automation of production. It saves a lot of manpower and greatly improves the production efficiency. This is a revolutionary improvement for the cup personalization industry.

[0004] The specific technical scheme of the present invention is: a production line for thermal transfer of the outer cylindrical surface of a rotary body, comprising: a paper loading station, a rotating outer cylindrical surface wrapping station, a baking station, and a paper removal station, each of which is provided with an automatic transfer facility; the paper loading station comprises a rotating body conveyor belt and a transfer paper conveyor belt which are parallel and synchronously operated, a plurality of rotating body outer cylindrical surface positioning facilities for carrying the rotating body are arranged in equal compartments on the rotating body conveyor belt, a plurality of transfer paper positioning facilities corresponding to the rotating body outer cylindrical surface positioning facilities are arranged on the transfer paper conveyor belt, and the characteristic is that at least one transfer paper conveyor belt is arranged in sequence beside the transfer paper conveyor belt. An elastic fastening leather feeding device, at least one transfer paper feeding device, at least one transfer paper clamping device for clamping the transfer paper, and at least one upper buckle device forming a rotating body transfer assembly, at least one rotating body end face positioning and pushing facility is provided at a position corresponding to the transfer paper clamping device next to the rear section of the rotating body conveyor belt; the paper removal station includes a finished product conveyor belt, and at least one unloading buckle device for disassembling the rotating body transfer assembly is provided next to the finished product conveyor belt, and the rotating body transfer assembly includes an elastic fastening leather capable of wrapping the transfer paper around the outer cylindrical surface of the rotating body and two U-shaped buckles for fixing the elastic fastening leather.

[0005] Furthermore, the elastic fastening skin is a rubber skin with straight support rods at both ends.

[0006] Furthermore, the U-shaped buckle comprises a section of stainless steel plate bent into a U-shaped buckle body, and the side of the U-shaped opening is provided with a notch for clamping the two straight support rods.

[0007] Furthermore, the outer circular surface positioning facilities of the rotating body are two adjacent cylindrical rubber rods that can hold up and drive a rotating body to rotate, and the rubber rods are hingedly connected.

[0008] Furthermore, the rotating body end face positioning and pushing facility comprises: a rotating body transverse displacement pushing rod with a tensioning clamp on the head and a rotating body bottom end face positioning block.

[0009] Furthermore, the end face positioning and pushing device of the rotating body comprises: a conical block on the head which can enter the open end of the rotating body and a positioning block on the bottom end face of the rotating body.

[0010] Furthermore, the transfer paper positioning facility includes: a rectangular transfer paper positioning tray, two opposite short sides of the transfer paper positioning tray are provided with transfer paper positioning pieces, the outer side of the transfer paper positioning piece is provided with a transfer paper positioning block, the four corners of the rectangle contained on the inner side of the transfer paper positioning piece are provided with elastic fastening leather external support columns, and a rotating body lateral sliding positioning block is provided in the middle of the outer side of the long side of one side of the transfer paper positioning tray.

[0011] Furthermore, the transfer paper clamping device includes: two pairs of X-shaped rocker arms that are symmetrically hinged to the intermediate frame in the middle, the bottoms of the two pairs of X-shaped rocker arms are respectively connected to two bottom beams, the two bottom beams are hingedly connected to a push-pull device, and the tops of the two pairs of X-shaped rocker arms are provided with hooks for hooking the straight support rods.

[0012] Furthermore, the upper buckle device includes: an automatic loader and a feed trough for arranging the hooks neatly, at least one pair of clamps for grabbing the U-shaped buckles and fixing the U-shaped buckles on two straight support rods are provided above the feed trough, and a longitudinal fully enclosed linear module horizontal guide rail and a transverse fully enclosed linear module horizontal guide rail are constrained for the movement of the clamps.

[0013] Furthermore, the buckle unloading device includes: a pressure block arranged above the finished product conveyor belt for pressing the rotating body transfer assembly, the pressure block is connected to the pressure block telescopic assembly, the pressure block telescopic assembly is fixed on the buckle unloading beam, the buckle unloading beam is fixedly connected to the pull rod bracket arranged on one side of the finished product conveyor belt, the pull rod bracket is provided with a buckle unloading telescopic assembly that can drive the buckle unloading door frame to move left and right, and the two door-shaped legs of the buckle unloading door frame are respectively provided with elbows that can hook out the buckle.

[0014] Furthermore, the elastic fastening leather loading device includes: the elastic fastening leather loading device includes: a transverse guide rail fixed between the feed tray and the transfer paper conveyor belt, the transverse guide rail is provided with a slide hanger that can move along the transverse guide rail, the slide hanger is provided with a mechanical arm that can move up and down along the slide hanger, and the top of the mechanical arm is provided with at least 2 vacuum suction cups for grabbing the elastic fastening leather.

[0015] A method for thermal transfer of the outer cylindrical surface of a rotary body using the above production line: the steps of the method are as follows:

[0016] Step 1, loading at the paper loading station: running the rotary body conveyor belt and the transfer paper conveyor belt, the elastic fastening leather loading device and the transfer paper loading device sequentially place the elastic fastening leather and the transfer paper on the transfer paper positioning device, the straight support rods at both ends of the elastic fastening leather are placed outside the elastic fastening leather outer support column, the transfer paper is placed on the elastic fastening leather and clamped in the transfer paper positioning sheet;

[0017] Step 2, push the cup into position: a transfer paper positioning device of the transfer paper conveyor belt reaches the position of the transfer paper clamping device, and at the same time, a rotary outer circumferential surface positioning device of the rotary body conveyor belt is also aligned with the position of the transfer paper clamping device. At this time, the rotary body end surface positioning and pushing device pushes the rotary body on the rotary body conveyor belt to the transfer paper positioning device on the transfer paper conveyor belt and positions the end surface;

[0018] Step 3, paper loading and fastening: the transfer paper clamping device is started, and the X-shaped rocker arm drags the two straight support rods of the elastic fastening leather to surround the outer circle of the rotating body, so that the transfer paper on the elastic fastening leather is closely attached to the outer circle surface of the rotating body, and the upper buckle device clamps the two straight support rods of the elastic fastening leather with the notches of the two U-shaped buckles to fix the two straight support rods and maintain the dynamic state of being wrapped around the outer circle surface of the rotating body to form a rotating body transfer assembly, and then the rotating body lateral displacement push rod is withdrawn, and the rotating body transfer assembly falls onto the transfer paper conveyor belt and continues to move forward;

[0019] Step 4, heating transfer: The transfer facility transfers the rotary transfer assembly loaded with transfer paper to the mesh belt of the tunnel-type stainless steel mesh belt electric heating kiln at the baking station. The mesh belt of the tunnel-type stainless steel mesh belt electric heating kiln carries the rotary transfer assembly through the oven to heat and complete the image transfer;

[0020] Step 5, paper removal: the transfer facility transfers the transferred rotating body assembly to the finished product conveyor belt, and the pressure block telescopic assembly of the unloading buckle device arranged next to the finished product conveyor belt presses the pressure block down to press a rotating body transfer assembly. At the same time, the unloading buckle telescopic assembly pushes the unloading buckle door frame forward, and the two elbows on the unloading buckle door frame are inserted into the bottom of the notch of the U-shaped buckle. The unloading buckle telescopic assembly contracts and pulls the U-shaped buckle out from the two straight support rods, so that the two straight support rods lose their constraints. The elastic fastening skin automatically unfolds under the elastic action, so that the transfer paper is separated from the rotating body, and the paper removal is completed.

[0021] The advantages and beneficial effects of the present invention are: the various devices for assembling the rotary transfer assembly and baking and disassembling the rotary transfer assembly are arranged together by a conveyor belt, so that the continuous and automated production of the rotary is realized. The elastic fastening skin tightly fits the transfer paper on the rotary body, making the transfer image clearer and the color more colorful, ensuring the transfer quality, and the small U-shaped buckle makes the installation and disassembly more convenient, and the intelligent automated production is easy to realize, thereby improving the production efficiency of the rotary thermal transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a thermal transfer production line for an outer circular surface of a rotary body according to the first embodiment of the present invention;

[0023] Figure 2 is an exploded view of the rotary transfer assembly according to the first embodiment of the present invention;

[0024] Figure 3 It is a combined diagram of the rotary transfer assembly described in the first embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the elastic fastening leather structure according to the second embodiment of the present invention;

[0026] Figure 5This is a schematic diagram of the U-shaped buckle structure described in Embodiment 3 of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the external circular surface positioning facility of the rotary body according to the fourth embodiment of the present invention;

[0028] Figure 7 1 is a schematic diagram of the structure of the end surface positioning and pushing device for the cup-shaped rotating body according to the fifth embodiment of the present invention, and is a schematic diagram of the state of the cup on the rotating body conveyor belt;

[0029] Figure 8 It is a schematic diagram of the structure of the end surface positioning and pushing device for the cup-shaped rotating body according to the fifth embodiment of the present invention, and is a schematic diagram of the state of the cup on the transfer paper conveyor belt;

[0030] Fig. 9 is a schematic diagram of the structure of the end surface positioning and pushing device for the rotating body without a cup handle according to the sixth embodiment of the present invention, and is a schematic diagram of the state of the bottle on the transfer paper conveyor belt;

[0031] Fig.10 is a schematic diagram of the structure of the end surface positioning and pushing device for the rotating body without a cup handle according to the sixth embodiment of the present invention, and is a schematic diagram of the state of the bottle on the transfer paper conveyor belt;

[0032] Fig.11 It is a schematic diagram of the structure of the end surface positioning and pushing device for the rotating body without a cup handle according to the sixth embodiment of the present invention, and is a schematic diagram of the state in which the positioning beam is lifted;

[0033] Fig.12 is a schematic diagram of the structure of the transfer paper positioning facility according to the seventh embodiment of the present invention;

[0034] Fig.13 is a schematic structural diagram of the transfer paper clamping device according to the eighth embodiment of the present invention when it is closed;

[0035] Fig.14 is a schematic structural diagram of the transfer paper clamping device according to the eighth embodiment of the present invention when it is opened;

[0036] Fig.15 is a schematic structural diagram of an upper buckle device according to a ninth embodiment of the present invention;

[0037] Fig.16 is a schematic structural diagram of the buckle removal device according to the tenth embodiment of the present invention, with the elbow facing inward;

[0038] Fig.17 2 is a schematic diagram of the structure of the buckle removal device according to the tenth embodiment of the present invention, with the elbow facing outward;

[0039] Fig.18is a schematic structural diagram of the elastic fastening leather feeding device according to the eleventh embodiment of the present invention;

[0040] Fig.19 It is a schematic structural diagram of the transfer paper feeding device described in Example 11 of the present invention. DETAILED DESCRIPTION

[0041] Embodiment 1:

[0042] This embodiment is a rotary outer circular surface thermal transfer production line, such as Figure 1 As shown, it includes the following stations arranged in sequence along the moving direction of the production line: manual inspection of cup quality or automatic inspection, cup positioning station, paper loading station, cup wrapping station, baking station, paper removal station and finished product unloading station, and transfer facilities are provided between each station. A rotating body outer circular surface positioning facility 4 is provided in the upper compartment of the rotating body conveyor belt 3. A plurality of transfer paper positioning facilities 2 corresponding to the rotating body outer circular surface positioning facilities 4 are provided on the transfer paper conveyor belt 1. At least one elastic fastening leather feeding device 7, at least one transfer paper feeding device 8, at least one transfer paper clamping device 6 for clamping the transfer paper, and at least one upper buckle device 9 for forming a rotating body transfer assembly are arranged in sequence beside the transfer paper conveyor belt 1. At least one rotating body end surface positioning and pushing facility 5 is provided at a position corresponding to the transfer paper clamping device 6 beside the rear section of the rotating body conveyor belt 3. The paper removal station includes a finished product conveyor belt 12. At least one unloading buckle device 11 for disassembling the rotating body transfer assembly is provided beside the finished product conveyor belt 12. The rotating body transfer assembly includes an elastic fastening skin 701 capable of wrapping the transfer paper 14 on the outer circumferential surface of the rotating body 13, and two U-shaped buckles 702 for fixing the elastic fastening skin. Figure 2 , 3 shown.

[0043] The basic process of thermal transfer in this embodiment is to closely attach the transfer paper to the rotating body, bake it, and then separate the transfer paper 14 from the rotating body 13. Therefore, a rotating body positioning station, a paper loading station, a cup wrapping station, a baking station, a paper removal station, and a finished product unloading station are set. The transfer facilities between the various stations can be a mechanical arm with a clamp or a vacuum suction cup.

[0044] It should be noted that the generatrix of the rotating body described in this embodiment is a straight line, or at least the generatrix of the rotating body surface for thermal transfer is a straight line. The rotating body is hollow and is a cup or bottle capable of holding liquid or other substances. The material of the rotating body can be a porcelain cup, such as a mug, or a stainless steel cup, and one side of the cup can have a handle, or no handle.

[0045] The paper loading station is relatively complex, with two conveyor belts, one for conveying the rotating body, and the other for conveying the elastic fastening skin 701 and the transfer paper 14. The rotating body conveyor belt is provided with a positioning facility for the outer cylindrical surface of the rotating body. Since the shape of the rotating body is a cylinder, if the rotating body is a cup, a cup handle is provided on one side of the cylindrical surface of the cylinder, and the position of the cup handle should be vertically upward when the outer circle is positioned. The end face positioning of the rotating body can use a positioning block, or a PC control system can be used to control the servo motor and infrared detection of the cup handle to ensure upward vertical positioning. If it is a stainless steel cup without a cup handle, an auxiliary fixing mold can be installed.

[0046] It should be noted that the center of rotation of the rotating body is perpendicular to the moving direction of the conveyor belt, and the two end faces of the cylinder face the left and right sides of the conveyor belt.

[0047] The outer circular surface positioning facilities of the rotating body can be in the form of cylindrical rubber rods that appear in pairs, or triangles that appear in pairs, etc. The rubber rods of the outer circular surface positioning facilities of the rotating body can also be made to be rotatable, and each rubber rod is hingedly connected with a chain, so that for the rotating body with a cup handle, the position of the cup handle can be adjusted by rotating the rubber rods, providing appropriate conditions for clamping the transfer paper. The transfer paper positioning facilities can be multiple trays for placing transfer paper that move with the conveyor belt. The size and shape of the trays match the size and shape of the transfer paper, that is, the size is slightly larger than the transfer paper, and the shape is the same as the transfer paper. The transfer paper is usually rectangular, so the tray is also rectangular, the long direction of the rectangle is consistent with the movement direction of the conveyor belt, and the short direction is perpendicular to the movement direction of the conveyor belt.

[0048] It should be noted that the positions of front, back, left and right described in this embodiment refer to the direction of movement of the items on the conveyor belt relative to the conveyor belt, with the forward direction of the conveyor belt being front, the reverse direction being back, and the two sides of the conveyor belt being left and right.

[0049] The key to thermal transfer is to tightly attach the transfer paper to the surface of the printed object. For this embodiment, the transfer paper is tightly attached to the outer cylindrical surface of the rotating body to achieve a clear transfer effect. To this end, this embodiment is provided with an elastic fastening skin, that is, a rectangular elastic rubber skin is used, and two short sides of the rectangular rubber skin are provided with straight support rods. Pulling the two straight support rods can stretch the rubber skin along the long direction of the rectangle. The length of the rectangular rubber skin in the long direction is less than the circumference of the outer cylindrical surface of the rotating body. When the rubber skin is around the outer cylindrical surface of the rotating body, as long as the two straight support rods are folded, the rubber skin can be tightly wrapped on the outer cylindrical surface of the rotating body.

[0050] In order to make the two support rods fold together on one side of the rotating body, two U-shaped buckles are buckled on the outer periphery of the two support rods so that the straight support rods cannot be separated. In this way, the rotating body, transfer paper and elastic fastening skin are fixed together to form a rotating body transfer assembly, such as Figure 2, 3 shown.

[0051] The spacing between two adjacent positioning facilities on the rotary body conveyor belt is equal to the spacing between two adjacent positioning facilities on the transfer paper conveyor belt. When the two conveyor belts are running, the outer cylindrical surface positioning facilities of the rotary body and the transfer paper positioning facilities run synchronously with each other. In this way, under the push of the rotary body end face positioning and pushing facility 5, the rotary body on the rotary body conveyor belt can be accurately pushed to the transfer paper positioning facility on the transfer paper conveyor belt, so that the two are combined together.

[0052] The rotary body end face positioning and pushing facility has two functions. One is to push the rotary body from the rotary body conveyor belt to the transfer paper conveyor belt. Since the rotary body conveyor belt is provided with a rotary body outer cylindrical surface positioning facility, as long as the rotary body conveyor belt and the transfer paper conveyor belt can be accurately synchronized, the outer cylindrical surface of the rotary body transferred from the rotary body conveyor belt to the transfer paper conveyor belt can also be accurately positioned. However, the end face positioning is also required when the rotary body is transferred from the rotary body conveyor belt to the transfer paper conveyor belt. Therefore, the second function of the rotary body end face positioning and pushing facility is to accurately position the end face of the rotary body at the position of the clamping device so that the clamping device can accurately wrap the transfer paper and the elastic fastening skin.

[0053] The main body of the rotating body end face positioning and pushing facility is the rotating body lateral displacement pushing rod. Depending on the shape of the rotating body, for example, a rotating body lateral displacement pushing rod with a tensioning clamp on the head can be used. For a bottle rotating body lateral displacement pushing rod, the head can be a push block slightly larger than the bottle mouth.

[0054] The rotating body loading device beside the rotating body conveyor belt can be manual loading or mechanical arm loading.

[0055] Since the transfer paper 14 and the elastic fastening skin are both stretchable and flexible, the transfer paper and the elastic fastening skin can be stacked in a material tray, and the transfer paper or the elastic fastening skin in the material tray can be sucked up by a manipulator with a vacuum suction cup, and then placed in the tray of the transfer paper positioning device, with the elastic fastening skin placed first and the transfer paper placed later. The transfer paper 14 or the elastic fastening skin can also be pushed into the tray of the transfer paper positioning device by a pushing method.

[0056] The transfer paper clamping device 6 combines the elastic fastening skin, transfer paper, rotating body and U-shaped buckle together to form a rotating body transfer assembly. Figure 2 , 3 As shown. This device is the key to this embodiment. Its main action is to roll up the elastic fastening skin around the rotating body so that the transfer paper is closely attached to the outer cylindrical surface of the rotating body. The action of the transfer paper clamping device is to drive the straight support rods at the front and rear ends of the elastic fastening skin to surround the rotating body. This action can be achieved using an X-shaped structure or other similar fork-shaped structures.

[0057] The upper buckle device is to clamp the U-shaped buckle on the two straight support rods of the elastic fastening skin. Due to the small size of the U-shaped buckle, the U-shaped buckle can be neatly arranged using equipment such as a vibrating conveyor, and then transported to the side of the transfer paper conveyor belt through the conveyor trough, and then the buckle is lifted by a mechanical arm and inserted between the two straight support rods. The size of the buckle depends on the diameter of the rotating body, the length of the fastening skin, and the tightness of the transfer paper.

[0058] The lateral displacement push rod of the rotary body is pushed by a push-pull device, and the stroke can be adjusted to perform telescopic movement according to the size of the cup. The head of the lateral displacement push rod of the rotary body is provided with an expansion mechanism. When the expansion mechanism expands, different molds can be replaced according to different cup types to fix the rotary body and achieve precise front and back positioning (front and back along the direction of movement of the conveyor belt). At the same time, the second function of the lateral displacement push rod of the rotary body is to push the rotary body on the rotary body conveyor belt to the transfer paper conveyor belt so as to be combined with the transfer paper and other parts to form a rotary body transfer assembly. The expansion mechanism can be realized by inclined displacement, that is, by using the forward push action of the cylinder, a plum petal is driven to unfold at the same time to achieve expansion.

[0059] The baking station can be set to continuous baking, that is, using the tunnel-type stainless steel mesh belt electric kiln conveyor belt as a mobile baking bracket, placing the rotary transfer assembly on the baking bracket through the oven, so that continuous baking can be achieved and efficiency can be improved. The tunnel-type stainless steel mesh belt electric kiln is composed of a chain conveyor made of heat-resistant steel and a high-temperature resistant tunnel kiln. The conveyor belt is a high-temperature resistant metal belt. In order to ensure a stable temperature, a high-power gold-plated infrared heating tube is used, and a unique air distribution device is equipped to evenly distribute the hot air to ensure the consistency of the product, and a material cooling system is also provided.

[0060] The core of the paper removal station is the buckle removal device. Since the U-shaped buckle fastens the two straight support rods by utilizing the elasticity of the elastic fastening skin, once the buckle is separated from the straight support rod, the elastic fastening skin will automatically stretch out. Therefore, the buckle removal device only needs to push and pull the U-shaped buckle to disassemble the entire rotary transfer assembly.

[0061] The elastic fastening leather feeding device, transfer paper feeding device, transfer paper clamping device, upper snap-fit ​​device, rotating body lateral displacement push rod, and snap-fit ​​unloading device in this embodiment are a complete set of systems that form a rotating body transfer assembly and perform thermal transfer and dismantle the assembly. Multiple sets of such systems can be set up to improve work efficiency. For example, four sets of such systems can be set up to process four rotating bodies at the same time, thereby improving production output and efficiency.

[0062] All push-pull devices in this embodiment use pneumatic cylinders, hydraulic cylinders or electric push rods. In order to ensure the stability of the equipment, the electric push rod can use a servo motor electric push rod. The guide rail can use a sliding guide rail or a rolling guide rail. The rolling guide rail can use a fully enclosed module guide rail. The push-pull device that controls the mechanical element in the servo system is a device that assists the motor to change speed. The servo motor rotor speed is controlled by a signal, and the speed can be controlled. The position accuracy is very accurate, etc. In order to ensure the stability of the finished product unloading end and reduce labor, an industrial camera can be used to control the mechanical arm and industrial camera. It can replace the human eye to do measurement and judgment on the assembly line. The target is converted into an image signal through digital image capture and transmitted to a dedicated image processing system. The image system performs various operations on these signals to extract the characteristics of the target, and then controls the equipment action of the field equipment according to the judgment result. The control system can use a program or sequential control system such as an industrial PC or PLC with high reliability, strong anti-interference ability, simple operation, and convenient and fast, or other electronic equipment with digital storage and processing capabilities.

[0063] Embodiment 2:

[0064] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment regarding the elastic fastening skin. The elastic fastening skin 701 of this embodiment is a rubber skin 701-2 with straight support rods 701-1 at both ends. Figure 4 shown.

[0065] The straight support rod 701-1 needs to have a certain strength and bending resistance, and can be made of 304 stainless steel. The rubber skin 701-2 should have greater elasticity and resistance to high temperature aging, and the pattern on the transfer paper will not penetrate the leather due to high temperature.

[0066] Embodiment three:

[0067] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the U-shaped buckle 702. The U-shaped buckle of this embodiment includes a section of plate bent into a U-shaped buckle body, and the side of the U-shaped opening is provided with a notch for clamping two straight support rods, such as Figure 5 shown.

[0068] The U-shaped buckle 702 in this embodiment is formed by stamping and bending a metal plate customized according to the diameter of the cup body, and the cross-sectional shape in the cross-section perpendicular to the moving direction of the conveyor belt is U-shaped. The side shape is a notch in the middle, with protrusions on both sides, forming two hooks 702-1, and there is an arc-shaped transition section 702-2 at the junction of the bottom of the notch and the hook to accommodate the straight support rod 701-1, so that the two protrusions constrain the straight support rod at the bottom of the notch.

[0069] Embodiment 4:

[0070] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the outer circular surface positioning device 4 of the rotating body. The outer circular surface positioning device of the rotating body described in this embodiment is two adjacent cylindrical rubber rods 401 that hold up a rotating body, and the rubber rods are hingedly connected, such as Figure 6 shown.

[0071] Two adjacent rubber rods are equivalent to two positioning blocks. There is a rotating body placement position between the two rubber rods. Each rubber rod is connected by a chain plate 402 similar to a chain. Figure 6 This positioning setting of the outer cylindrical surface of the rotating body is for cups with handles on the rotating body. When the handle is not vertically upward, the cylindrical rubber rod can be rotated by the servo motor and infrared sensor to adjust the direction of the handle. The advantage of using two rubber rods for positioning is that it can not only adjust the position of the handle, but also is insensitive to the size of the outer diameter of the workpiece. In other words, as long as the outer diameter of the rotating body changes within a certain range, the two rubber rods can be well positioned without adjusting the distance between the two rubber rods.

[0072] Embodiment five:

[0073] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the end face positioning and pushing device of the rotating body. The end face positioning and pushing device of the rotating body described in this embodiment includes: a rotating body transverse displacement pushing rod 502 with a tensioning chuck 501 on the head, such as Figure 7 , 8 shown.

[0074] This embodiment is for a wide-mouthed rotating body, such as a mug. The head of the rotating body transverse displacement push rod is provided with a tensioning clamp. When the rotating body transverse displacement push rod is not inserted into the cup, the tensioning clamp is retracted. Figure 7 As shown in FIG. 1 , when the rotary body transverse displacement push rod is inserted into the cup, the tensioning chuck opens, and the cup is supported by the tensioning force and pushed from the rotary body conveyor belt to the transfer paper conveyor belt, as shown in FIG. Figure 8 shown.

[0075] In order to position more accurately, a cup bottom positioning block can be set at the bottom of the cup to serve as an axial constraint on the bottom of the cup.

[0076] Embodiment six:

[0077] This embodiment is an improvement of the above embodiment, and is a refinement of the end face positioning and pushing facility of the above embodiment. The end face positioning and pushing facility of the rotating body described in this embodiment comprises: a rotating body transverse displacement pushing rod 502 with a push block 503 on the head to support the open end of the rotating body, the transverse displacement pushing rod is hingedly connected to a positioning beam 504, and the positioning beam is provided with a pressure rod 505 and a bottom end face positioning block 506 of the rotating body, such as Fig. 9, 10 , as shown in 11.

[0078] This embodiment can be applied to a rotating body with a small mouth such as a bottle, or a cup without a handle, such as a stainless steel cup. The head of the rotating body transverse displacement push rod is provided with a positioning block for supporting the bottle mouth or cup mouth. The positioning block pushes the bottle or cup forward under the push of the push rod. Fig. 9 As shown, the bottle or cup is moved from the rotary body conveyor belt to the transfer paper conveyor belt. At this time, the positioning beam is in a horizontal state, and the positioning block at the bottom end face of the rotary body is aligned with the bottom of the bottle or cup, restricting the bottle or cup to continue to move forward, completing the movement and positioning, as shown in FIG. Fig.10 After the positioning is complete, the quotation device starts the clamping action. Due to the clamping action, the cup or bottle may be lifted up. At this time, the pressure rod will prevent the cup or bottle from lifting up. When the clamping device almost completes the clamping operation, the positioning beam is lifted, as shown in the figure. Fig.11 As shown, avoid interfering with the buckle on the clamping device.

[0079] Embodiment seven:

[0080] This embodiment is an improvement of the above embodiment, and is a refinement of the transfer paper positioning device 2 of the above embodiment. The transfer paper positioning device 2 of this embodiment comprises: a rectangular transfer paper positioning tray 201-5, two opposite short sides of the transfer paper positioning tray are provided with transfer paper positioning pieces 201-1, the outer side of the transfer paper positioning piece is provided with a transfer paper positioning block 201-4, the four corners of the rectangle included in the inner side of the transfer paper positioning piece 201-1 are provided with elastic fastening leather outer support columns 201-2, and a rotating body lateral push positioning block 201-3 is provided in the middle of the outer side of the long side of one side of the transfer paper positioning tray 201-5, such as Fig.12 shown.

[0081] The main body of the transfer paper positioning device 2 is a transfer paper positioning tray 201-5 to accommodate the transfer paper and the elastic fastening skin. In order to accurately position the transferred pattern at the correct position of the rotating body, the transfer paper positioning tray is provided with multiple positioning facilities. First, there is a transfer paper positioning sheet, and then there is a transfer paper positioning block on the outside of the transfer paper positioning sheet. Then, there are elastic fastening skin outer support columns at the four corners of the rectangle contained in the inner side of the transfer paper positioning sheet. Finally, there is a rotating body lateral push positioning block on the middle of the outer side of one long side of the transfer paper positioning tray.

[0082] Embodiment eight:

[0083] This embodiment is an improvement of the above embodiment, and is a refinement of the transfer paper clamping device of the above embodiment. The transfer paper clamping device of this embodiment includes: two pairs of X-shaped rocker arms 601 and 602, which are respectively hinged to the middle frame 603 in the middle of the left and right symmetry. The bottoms of the two pairs of X-shaped rocker arms are respectively connected to two bottom beams 604 and 605. The push-pull device 606 is hingedly connected between the two bottom beams. The tops of the two pairs of X-shaped rocker arms are provided with hooks 602-1 for hooking the straight support rods, such as Fig.13 , 14 As shown, Fig.13 It is a schematic diagram of the structure when the transfer paper clamping device is closed. Fig.14 It is a schematic diagram of the structure when the transfer paper clamping device is opened.

[0084] The transfer paper clamping device includes a middle frame fixed below the transfer paper conveyor belt, and two pairs of X-shaped rocker arms hinged to the middle frame symmetrically. The bottoms of the two pairs of X-shaped rocker arms are fixedly connected through the bottom beam and are hinged to the middle frame to form a whole. A push-pull device is hinged between the front and rear bottom beams. The two X-shaped rocker arms can pass through the space in the middle of the transfer paper conveyor belt chain under the push of the rocker push-pull device. The four vertices of the X-shaped rocker arms are provided with two opposite hooks. The function of the hook is to hook the four exposed ends of the straight support rods at both ends of the elastic fastening leather on the transfer paper conveyor belt, and to make a movement around the outer circle of the rotating body under the action of the rocker arm.

[0085] Before working, the push-pull rod of the push-pull device is fully extended, and the two X-shaped rocker arms are pushed to a position close to the horizontal opening. The hooks are hooked on both ends of the straight support rod of the elastic fastening skin from below. Fig. 9 When working, the swivel body transverse shifting push rod pushes a swivel body on the swivel body transmission belt to the elastic fixing sheet covered with transfer paper. At this time, the swivel body transverse shifting push rod is equivalent to a positioner, fixing the swivel body. Then the rocker arm push-pull device shrinks, the two X-shaped rockers are lifted, and the four vertices of the two rockers shrink inward. The hook lifts up the two straight support rods of the elastic fastening skin and makes a movement around the outer circumference of the swivel body until the elastic fastening skin and the transfer paper supported on it are wrapped together and attached to the outer circumference of the swivel body. At this time, the two straight support rods of the elastic fastening skin are pushed up, retracted, and clamped, as shown in the figure. Figure 8 As shown, the action of rolling up and clamping the flat elastic fastening skin is completed, so as to achieve the purpose of making the transfer paper held up by the elastic fastening skin close to the outer cylindrical surface of the rotating body.

[0086] Embodiment nine:

[0087] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the upper buckle device 9. The upper buckle device 9 of this embodiment includes: an automatic feeder 901 and a feed trough 905 for arranging the hooks neatly, at least one pair of clamps 904 for grabbing the U-shaped buckles 702 and fixing the U-shaped buckles 702 on the two straight support rods 701-1 are arranged above the feed trough 905, and a longitudinal horizontal guide rail 902 and a transverse horizontal guide rail 903 for restraining the movement of the clamps, such as Fig.15 shown.

[0088] The main body of the upper buckle device is a manipulator. The manipulator is equipped with at least two clamps in pairs, and the two clamps clamp a U-shaped buckle respectively, and insert it into the two ends of two straight support rods gathered together by an elastic fastening skin. Four or six clamps can also be set on the head of the manipulator to insert the U-shaped buckle into multiple rotating body transfer assemblies at the same time, thereby improving work efficiency and increasing production.

[0089] The automatic feeder arranges the U-shaped hooks neatly and conveys them to the buckle trough for the gripper to pick up. The buckle trough is equivalent to a temporary storage bin. The automatic feeder can use a vibrating conveyor to vibrate and align the buckles into the buckle trough.

[0090] Embodiment ten:

[0091] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the buckle unloading device 11. The buckle unloading device 11 of this embodiment includes: a pressing block 1101 arranged above the finished product conveyor belt for pressing the rotary body transfer assembly, the pressing block is connected to a pressing block telescopic assembly 1102, the pressing block telescopic assembly is fixed to a buckle unloading beam 1103, the buckle unloading beam is fixedly connected to a tie rod bracket 1104 arranged on one side of the finished product conveyor belt, the tie rod bracket is provided with a buckle unloading telescopic assembly 1106 capable of driving a buckle unloading door frame 1105 to move left and right, and the two door-shaped legs 1107 of the buckle unloading door frame are respectively provided with elbows 1108 capable of hooking out the buckle, such as Fig.16 , 17 shown.

[0092] The pull rod bracket of this embodiment is on one side of the finished product conveyor belt. The pull rod bracket is vertically arranged and fixedly connected to the unloading buckle cross beam to form an inverted L shape. The inverted L shape is a cantilever beam structure, and a double-column structure can also be adopted, that is, two vertical columns are connected by an unloading buckle cross beam to span the finished product conveyor belt, and its stress state is better than that of the inverted L-shaped bracket. Due to the small force, the telescopic assembly set on the pull rod bracket can simply use only push-pull devices, and use the telescopic and guiding effects of the push-pull devices to directly control the left and right movement of the unloading buckle door frame. The structure of a guide rail plus a servo electric cylinder can also be used to make the left and right movement of the unloading buckle door frame more stable and reliable. One end of the telescopic assembly is fixed on the pull rod bracket, and the other end is connected to the unloading buckle door frame. The buckle removal door frame is in the shape of a door. The distance between the two legs of the door shape is equal to the distance between the two buckles on the rotating body transfer assembly. Two elbows are respectively provided at the top of the two legs of the door shape. When the buckle removal door frame is stretched forward, the two elbows will be inserted into the lower end of the buckle to hook the buckle. When the buckle removal door frame is stretched outward, the buckle is pulled down from the two straight support rods, so that the two straight support rods are separated, and the buckle removal is completed.

[0093] The elbow can be bent inwards, such as Fig.16 As shown, it can also be bent outwards, such as Fig.17 shown. Fig.16 , 17 The dotted elbow in the middle shows the state when the elbow is hooked on the U-shaped buckle.

[0094] Embodiment eleven:

[0095] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the elastic fastening skin feeding device 7. The elastic fastening skin feeding device 7 of this embodiment comprises: a transverse guide rail 704 fixed between a feeding tray 703 and a transfer paper conveyor belt 1. The transverse guide rail is provided with a slide hanger 705 that can move along the transverse guide rail, and the slide hanger is provided with a mechanical arm 706 that can move up and down along the slide hanger. The top of the mechanical arm 706 is provided with at least two vacuum suction cups 706-1 for grabbing the elastic fastening skin, such as Fig.17 shown.

[0096] The elastic fastening skin feeding device 7 of this embodiment is suitable for feeding the elastic fastening skin 701 and the transfer paper 14. The elastic fastening skin feeding device 7 is arranged before the transfer paper feeding device 8. The elastic fastening skin 701 and the transfer paper 14 are stacked in their respective feeding trays 703 and 709. The mechanical arm 706 with the vacuum suction cup 706-1 is arranged on the transverse guide rail. The mechanical arms 706 and 710 are connected to the transverse guide rails 704 and 712 through the slide hangers 705 and 711. A vertical slide rail is arranged between the mechanical arms 706 and 710 and the slide hangers 705 and 711. The mechanical arms 706 and 710 realize vertical grasping and horizontal transfer. The mechanical arm for grasping the elastic fastening skin 701 has no less than 4 vacuum suction cups; the mechanical arm for grasping the transfer paper 14 has no less than 2 vacuum suction cups. The elastic fastening skin feeding device 7 and the transfer paper feeding device 8 are arranged front and back, or arranged in parallel. When arranged in parallel, the positions of the vacuum suction cups 706-1, 707 on the mechanical arms 706, 710 are adjusted accordingly. This design realizes the automatic feeding of the elastic fastening skin and the transfer paper, reducing the labor cost.

[0097] Embodiment 12:

[0098] This embodiment is a method for thermal transfer of the outer cylindrical surface of a rotary body using the above-mentioned production line. The basic principle is: two conveyor belts are used to respectively convey the rotary body and the transfer paper and the elastic fastening skin wrapped with the transfer paper, the rotary body is placed on the transfer paper positioning device by positioning the head of the rotary body transverse displacement push rod, and the transfer paper clamping device and the upper buckle device combine the rotary body, the transfer paper 14, and the elastic fastening skin 701 with a U-shaped buckle 702 to form a rotary body transfer assembly. + The rotary body transfer assembly is placed in an oven 10 for baking, and then the U-shaped buckle 702 is removed to disassemble the rotary body transfer assembly and complete the rotary body transfer.

[0099] The specific steps of the method in this embodiment are as follows:

[0100] Step 1, loading at the paper loading station: operate the rotary conveyor belt 3 and the transfer paper conveyor belt 1, and place the elastic fastening leather 701 and the transfer paper 14 on the transfer paper positioning device 2 in sequence by the elastic fastening leather piece loading device 7 and the transfer paper loading device 8, and place the straight support rods 701-1 at both ends of the elastic fastening leather 701 on the outside of the outer support column of the elastic fastening leather 701, and place the transfer paper 14 on the elastic fastening leather 701 and clamp it in the transfer paper positioning piece 201-1;

[0101] The synchronous operation of the rotary body conveyor belt 3 and the transfer paper conveyor belt 1 means that the rotary body positioning facilities and the transfer paper positioning facilities on the two conveyor belts operate in a one-to-one correspondence.

[0102] The rotating body is loaded by a robot or manually placing the rotating body on the rotating body outer circular surface positioning device 4 on the rotating body conveyor belt 3 to position the rotating body and ensure that the cup handle is vertically upward and the cup mouth faces the position where the rotating body transverse displacement push rod 502 can be inserted.

[0103] The elastic fastening skin feeding device 7 disposed beside the transfer paper conveyor belt 1 first places the elastic fastening skin 701 on the transfer paper positioning device 2 of the transfer paper conveyor belt 1, and then the transfer paper feeding device 8 places the transfer paper 14 on the elastic fastening skin 701. At this time, there is already a rotating body on the rotating body conveyor belt 3 corresponding to the installed elastic fastening skin and transfer paper.

[0104] Step 2, push the cup into position: a transfer paper positioning device of the transfer paper conveyor belt reaches the position of the transfer paper clamping device, and at the same time, a rotary outer circumferential surface positioning device of the rotary body conveyor belt is also aligned with the position of the transfer paper clamping device. At this time, the rotary body end surface positioning and pushing device pushes the rotary body on the rotary body conveyor belt to the transfer paper positioning device on the transfer paper conveyor belt and positions the end surface;

[0105] The position of the rotating body clamping device 6 is a very critical position, and a rotating body transverse shifting push rod 502 is provided at this position. The tensioning chuck at the head of the rotating body transverse shifting push rod 502 is inserted into a rotating body on a rotating body conveyor belt 3 and tightened, and then the rotating body is pushed forward to the transfer paper positioning device 2 on the transfer paper conveyor belt 1. The rotating body transverse shifting positioning block provided in the middle of the transfer paper positioning device 2 limits the transverse stroke of the rotating body, which is to position the left and right positions of the rotating body, and the tensioning chuck at the head of the rotating body transverse shifting push rod 502 is to position the front and rear positions of the rotating body. These two positionings are very critical, mainly to align the left and right side protruding parts of the two straight support rods 701-1 of the elastic fastening skin with the hook 602-1 on the X-shaped rocker arm, so that the hook 602-1 can hook the straight support rod 701-1 in step 3, so that the X-shaped rocker arm drives the support plate to do the action of surrounding the outer circle of the rotating body. If the rotating body is provided with a cup handle, the cup handle needs to be positioned so that it is vertically upward to avoid the two pairs of X-shaped rocker arms of the clamping device, so that the two straight support rods for fixing the skin are located on both sides of the cup handle after the clamping.

[0106] Step 3, paper loading and fastening: the transfer paper clamping device 6 is started, and the X-shaped rocker arms 601 and 602 drag the two straight support rods 701-1 of the elastic fastening skin 701 to surround the outer circle of the rotary body, so that the transfer paper on the elastic fastening skin 701 is closely attached to the rotary body, and the upper buckle device 9 clamps the two straight support rods 701-1 of the elastic fastening skin 701 with the notches of the two U-shaped buckles 702, so that the two straight support rods 701-1 are maintained on both sides of the rotary body auxiliary positioning mold to form a rotary body transfer assembly, and then the rotary body lateral displacement push rod 502 is withdrawn, and the rotary body transfer assembly falls onto the transfer paper conveyor belt 1 and continues to move forward;

[0107] This step is a key step of the rotary transfer assembly. The hook 602-1 at the top of the X-shaped rocker arm hooks the left and right protruding parts of the two straight support rods 701-1, so that the X-shaped rocker arms 601, 602 can drive the elastic fastening skin 701 to surround the outer circle of the rotary body. When the X-shaped rocker arms 601 and 602 drive the straight support rods 701-1 to surround the outer circle of the rotating body, the two straight support rods 701-1 of the elastic fastening skin are driven and tightened by the hook 602-1, so that the elastic fastening skin 701 generates a prestressed force that automatically expands outwards. This prestressed force is very useful. On the one hand, when the U-shaped buckle 702 clamps the straight support rods 701-1, the two straight support rods 701-1 have an outward tendency, and the notch of the U-shaped buckle 702 constrains the outward tendency of the two straight support rods 701-1, which is the reaction force of the prestressed force of the elastic fastening skin 701 expanding outwards. The balance of the two makes the elastic fastening skin 701 maintain the state of surrounding the outer circle of the rotating body. On the other hand, when removing the buckle, as long as the U-shaped buckle 702 is separated from the two straight support rods 701-1, the elastic fastening skin 701 can be automatically expanded, and there is no need to peel it off mechanically or manually, which is very convenient. The most important thing is that this prestress provides the transfer paper 14 with pressure to tightly surround the outer cylindrical surface of the rotating body. This pressure is very important for a clear transfer image. If there is no such pressure or the pressure is insufficient, the transfer image will not be clear enough, which will reduce the transfer quality.

[0108] The U-shaped buckle 702 is a very small part, only the size of a thumb. After being neatly arranged like a bullet chain during the conveying process, the mechanical arm grabs and inserts it between the two elastic fastening leather straight support rods 701-1 to clamp the two straight support rods 701-1. The small part provides great convenience for automatic loading and unloading. The U-shaped buckle 702 has a very simple shape and is easy to manufacture. It can be produced by a one-step stamping method, which is extremely efficient and low cost.

[0109] The second and third steps are completed at one time in actual operation, that is, the rotary body lateral shifting push rod 502 positions the rotary body, pushes the rotary body to the transfer paper positioning device, the transfer paper clamping device 6 performs the clamping action, and the U-shaped buckle 702 clamps the left and right ends of the straight support rod 701-1 to form a rotary body transfer assembly. Several actions are completed in less than one second. Therefore, in order to improve efficiency, a system consisting of multiple sets of rotary body lateral shifting push rods and transfer paper clamping devices can be set up next to the two conveyor belts to perform the second and third steps at the same time, so that multiple rotary body transfer assemblies can be completed at the same time, which is more efficient.

[0110] Step 4, heating transfer: The transfer facility transfers the transfer cup assembly with transfer paper to the mesh belt 10-1 of the tunnel-type stainless steel mesh belt electric heating kiln at the baking station. The mesh belt 10-1 of the tunnel-type stainless steel mesh belt electric heating kiln brings the rotary transfer assembly through the oven 10 for several minutes. Figure 1 , heating to complete the image transfer.

[0111] This step adopts a continuous baking method, and the rotary transfer assembly is placed on a wire mesh conveyor belt and slowly moves through the oven 10. The rotary transfer assembly is baked in the oven 10 by infrared heating, and the rotary transfer assembly continues to move forward while baking until it leaves the oven 10.

[0112] Step 5, paper removal: the transfer facility transfers the transferred rotating body assembly to the finished product conveyor belt 12, and the pressure block telescopic assembly of the unloading buckle device 11 arranged next to the finished product conveyor belt 12 presses the pressure block down to press a rotating body transfer assembly. At the same time, the unloading buckle telescopic assembly pushes the unloading buckle door frame forward, and the two elbows on the unloading buckle door frame are inserted into the bottom of the notch of the U-shaped buckle. The unloading buckle telescopic assembly contracts and pulls the U-shaped buckle out from the two straight support rods, so that the two straight support rods 701-1 lose their constraints, and the elastic fastening skin 701 automatically unfolds under the elastic action, so that the transfer paper 14 is separated from the rotating body 13, and the paper removal is completed.

[0113] The disassembly efficiency of this step is also very high and can be completed within one second. Therefore, just like assembling the rotary transfer assembly, paper disassembly can also set up multiple systems at the same time to disassemble multiple rotary transfer assemblies at the same time to improve efficiency.

[0114] We use cameras and robotic arms to replace manual labor in the finished product unloading device, which greatly reduces the labor cost.

[0115] Finally, it should be noted that the above is only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred arrangement scheme, a person skilled in the art should understand that the technical solution of the present invention (such as the form and structure of the belt conveyor, the structural form of each device, the arrangement of the production line, etc.) can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A production line for thermal transfer of outer cylindrical surface of a rotary body, comprising: a paper loading station, a rotating outer cylindrical surface wrapping station, a baking station, and a paper removal station arranged in sequence, and automatic transfer facilities are arranged between each station; the paper loading station comprises a rotating body conveyor belt and a transfer paper conveyor belt running in parallel and synchronously, a plurality of rotating body outer cylindrical surface positioning facilities carrying the rotating body are arranged at equal intervals on the rotating body conveyor belt, and a plurality of transfer paper positioning facilities corresponding to the rotating body outer cylindrical surface positioning facilities are arranged on the transfer paper conveyor belt, characterized in that: At least one elastic fastening leather feeding device, at least one transfer paper feeding device, at least one transfer paper clamping device for clamping the transfer paper, and at least one upper buckle device forming a rotating body transfer assembly are sequentially arranged beside the transfer paper conveyor belt. A rotating body end face positioning and pushing facility is arranged at a position corresponding to the transfer paper clamping device beside the rear section of the rotating body conveyor belt; the paper removal station includes a finished product conveyor belt, and at least one unloading buckle device for disassembling the rotating body transfer assembly is arranged beside the finished product conveyor belt. The rotating body transfer assembly includes an elastic fastening leather that can wrap the transfer paper around the outer cylindrical surface of the rotating body and two U-shaped buckles that fix the elastic fastening leather. The rotating body end face positioning and pushing facility includes: a rotating body lateral displacement pushing rod with a tensioning clamp on the head and a rotating body bottom end face positioning block.

2. The production line according to claim 1, characterized in that: The elastic fastening skin is a rubber skin with straight support rods at both ends.

3. The production line according to claim 2, characterized in that: The U-shaped buckle comprises a section of stainless steel plate bent into a U-shaped buckle body, and the side of the U-shaped opening is provided with a notch for clamping the two straight support rods.

4. The production line according to claim 3, characterized in that: The outer circular surface positioning facilities of the rotating body are two adjacent cylindrical rubber rods which can hold up and drive a rotating body to rotate, and the rubber rods are hingedly connected.

5. The production line according to claim 4, characterized in that: The transfer paper positioning facility includes: a rectangular transfer paper positioning tray, two opposite short sides of the transfer paper positioning tray are provided with transfer paper positioning pieces, the outer side of the transfer paper positioning piece is provided with a transfer paper positioning block, the four corners of the rectangle contained on the inner side of the transfer paper positioning piece are provided with elastic fastening leather external support columns, and a rotating body lateral sliding positioning block is provided in the middle of the outer side of the long side of one side of the transfer paper positioning tray.

6. The production line according to claim 5, characterized in that: The transfer paper clamping device comprises: two pairs of X-shaped rocker arms which are symmetrically hinged to the middle frame in the middle, the bottoms of the two pairs of X-shaped rocker arms are respectively connected to two bottom beams, the two bottom beams are hingedly connected to push-pull devices, and the tops of the two pairs of X-shaped rocker arms are provided with hooks for hooking the straight support rods.

7. The production line according to claim 6, characterized in that: The upper buckle device includes: an automatic loader and a feed trough that arrange the hooks neatly, at least one pair of clamps that grab the U-shaped buckles and fix the U-shaped buckles on two straight support rods are provided above the feed trough, and a longitudinal fully enclosed linear module horizontal guide rail and a transverse fully enclosed linear module horizontal guide rail that constrain the movement of the clamps.

8. The production line according to claim 7, characterized in that: The buckle unloading device includes: a pressure block arranged above the finished product conveyor belt for pressing the rotating body transfer assembly, the pressure block is connected to the pressure block telescopic assembly, the pressure block telescopic assembly is fixed on the buckle unloading beam, the buckle unloading beam is fixedly connected to the pull rod bracket arranged on one side of the finished product conveyor belt, the pull rod bracket is provided with a buckle unloading telescopic assembly that can drive the buckle unloading door frame to move left and right, and the two door-shaped legs of the buckle unloading door frame are respectively provided with elbows that can hook out the buckle.

9. The production line according to claim 8, characterized in that: The elastic fastening leather feeding device includes: a transverse guide rail fixed between the feed tray and the transfer paper conveyor belt, the transverse guide rail is provided with a slide hanger that can move along the transverse guide rail, the slide hanger is provided with a mechanical arm that can move up and down along the slide hanger, and the top of the mechanical arm is provided with at least two vacuum suction cups for grabbing the elastic fastening leather.

10. A method for thermal transfer of the outer cylindrical surface of a rotary body using the production line of claim 9, characterized in that: The steps of the method are as follows: Step 1, loading at the paper loading station: running the rotary body conveyor belt and the transfer paper conveyor belt, the elastic fastening leather loading device and the transfer paper loading device sequentially place the elastic fastening leather and the transfer paper on the transfer paper positioning device, the straight support rods at both ends of the elastic fastening leather are placed outside the elastic fastening leather outer support column, the transfer paper is placed on the elastic fastening leather and clamped in the transfer paper positioning sheet; Step 2, push the cup into position: a transfer paper positioning device of the transfer paper conveyor belt reaches the position of the transfer paper clamping device, and at the same time, a rotary outer circumferential surface positioning device of the rotary body conveyor belt is also aligned with the position of the transfer paper clamping device. At this time, the rotary body end surface positioning and pushing device pushes the rotary body on the rotary body conveyor belt to the transfer paper positioning device on the transfer paper conveyor belt and positions the end surface; Step 3, paper loading and fastening: the transfer paper clamping device is started, and the X-shaped rocker arm drags the two straight support rods of the elastic fastening leather to surround the outer circle of the rotating body, so that the transfer paper on the elastic fastening leather is closely attached to the outer circle surface of the rotating body, and the upper buckle device clamps the two straight support rods of the elastic fastening leather with the notches of the two U-shaped buckles to fix the two straight support rods and maintain the dynamic state of being wrapped around the outer circle surface of the rotating body to form a rotating body transfer assembly, and then the rotating body lateral displacement push rod is withdrawn, and the rotating body transfer assembly falls onto the transfer paper conveyor belt and continues to move forward; Step 4, heating transfer: The transfer facility transfers the rotary transfer assembly loaded with transfer paper to the mesh belt of the tunnel-type stainless steel mesh belt electric heating kiln at the baking station. The mesh belt of the tunnel-type stainless steel mesh belt electric heating kiln carries the rotary transfer assembly through the oven to heat and complete the image transfer; Step 5, paper removal: the transfer facility transfers the transferred rotating body assembly to the finished product conveyor belt, and the pressure block telescopic assembly of the unloading buckle device arranged next to the finished product conveyor belt presses the pressure block down to press a rotating body transfer assembly. At the same time, the unloading buckle telescopic assembly pushes the unloading buckle door frame forward, and the two elbows on the unloading buckle door frame are inserted into the bottom of the notch of the U-shaped buckle. The unloading buckle telescopic assembly contracts and pulls the U-shaped buckle out from the two straight support rods, so that the two straight support rods lose their constraints, and the elastic fastening skin automatically unfolds under the elastic action, so that the transfer paper is separated from the rotating body, and the paper removal is completed.

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