CN112707142A

CN112707142A - Tire blank conveying system and method

Info

Publication number: CN112707142A
Application number: CN202011615569.0A
Authority: CN
Inventors: 李彦海; 李志军
Original assignee: Safe Run Intelligent Equipment Co Ltd
Current assignee: Safe Run Intelligent Equipment Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-27
Anticipated expiration: 2040-12-30
Also published as: CN112707142B

Abstract

The invention belongs to the technical field of tire production, and discloses a tire blank conveying system and a conveying method thereof. This child embryo conveying system can carry the tray between shaping worker station and vulcanization worker station to borrow by the tray and carry the child embryo, it includes: the conveying line and the return line are arranged in a closed loop to circularly convey the tray; a first conveying device configured to convey the green tire output from the molding station to an empty tray supplied by a return line; a second conveying device configured to convey the green tire supplied from the conveying line to the vulcanization station; a first transfer warehouse configured to receive and output the trays transferred from the upstream so as to adjust the number of the trays on the conveying line; and a second transfer library configured to receive and output the trays transferred upstream thereof to adjust the number of trays on the return line. The tire blank conveying system can circularly convey the trays, and the number of the trays flowing in the tire blank conveying system is adjusted in real time so as to match the working efficiency of a forming station and a vulcanizing station.

Description

Tire blank conveying system and method

Technical Field

The invention relates to the technical field of tire production, in particular to a tire blank conveying system and a tire blank conveying method.

Background

The production process of the tire mainly comprises the working procedures of banburying, rubber component preparation, molding, vulcanization and the like, wherein the banburying process is characterized in that raw materials such as carbon black, natural/synthetic rubber, oil, additives, accelerators and the like are mixed to form rubber materials, the rubber component preparation process is characterized in that all semi-finished rubber components for forming the tire are obtained by extruding, calendaring, molding and other working sections of the rubber materials, the molding process is characterized in that all the semi-finished rubber components are assembled and molded into a tire blank, and the vulcanization process is characterized in that the green tire is vulcanized into a finished tire.

Because the child embryo shaping production efficiency and child embryo vulcanization production efficiency often do not match, and generally be that the child embryo shaping output is greater than child embryo vulcanization demand, generally be provided with the turnover storehouse that is used for saving the child embryo among the tire factory, this turnover storehouse passes through each make-up machine of the shaping station that the transfer chain connection is used for shaping the child embryo and is used for vulcanizing each vulcanizer at the vulcanization station of child embryo to can deposit the child embryo that the shaping station lasts the output, and export the child embryo in good time and carry out vulcanization to each vulcanizer at vulcanization station.

In order to support and protect the shape of the green tire during conveying and storage, the conveying line and the turnover warehouse transmit or store the green tire through the tray capable of reliably carrying the green tire, the green tire is separated from the tray when entering the vulcanization station, and the empty tray needs to be recovered to the forming station to carry the green tire again. The recycling operation of the empty tray generally utilizes carrying equipment or manual stacking trays, and then the whole stacking tray is transported to a forming work station by a forklift and is disassembled for use.

However, the above-mentioned tray circulation operation rule is generally set only for the case where the molding station and the vulcanizing station continuously operate at a specific efficiency, and if there is a case where the actual work efficiency does not match the set work efficiency due to the centralized molding or vulcanizing of a certain batch of green tires, or the partial maintenance of the equipment, the tray supply in the tray circulation operation is unbalanced.

If the supply of the trays in the forming station is insufficient, the situation that empty trays are waited for supply occurs at the forming station, the working efficiency of the forming station is reduced, and green tires of the forming station are seriously accumulated; if the output of the empty tray at the vulcanization work station is too much, the recovery operation amount of the empty tray is increased rapidly, the situation that the vulcanization work station waits for the empty tray to be recovered is caused, the work efficiency of the vulcanization work station is reduced, and the overall operation efficiency of a tire factory is influenced.

Therefore, the above problems need to be solved.

Disclosure of Invention

One objective of the present invention is to provide a green tire conveying system, which can circularly convey trays and adjust the number of trays circulating in the green tire conveying system in real time to match the working efficiency of a forming station and a vulcanizing station.

In order to achieve the purpose, the invention adopts the following technical scheme:

a green tire conveying system for conveying a tray between a molding station and a curing station to convey a green tire output from the molding station to the curing station via the tray, the green tire conveying system comprising:

transfer devices are respectively arranged between the head end of the conveying line and the tail end of the return line and between the tail end of the conveying line and the head end of the return line, and the transfer devices are configured to transfer trays between the conveying line and the return line so as to circularly convey the trays between the vulcanization station and the forming station;

a first conveying device arranged at an output end of the forming station, wherein the first conveying device is configured to convey the green tires output by the forming station to an empty tray supplied by the return line;

a second conveying device arranged at the input end of the vulcanization station, wherein the second conveying device is configured to convey the green tire supplied by the conveying line to the vulcanization station;

the first transfer warehouse is arranged at the middle section of the conveying line and is configured to store and output the pallets loaded with the green tires conveyed from the upstream of the first transfer warehouse so as to adjust the number of the pallets on the conveying line; and

the second transfer warehouse is arranged in the middle section of the return line and is configured to receive and output empty trays transmitted from the upstream of the second transfer warehouse so as to adjust the number of the trays on the return line.

Preferably, the green tire conveying system further comprises a first sensor for collecting the number of the trays on the conveying line, and the first sensor is electrically connected with the first transfer warehouse, so that the first transfer warehouse can compensate the number deviation of the trays on the conveying line based on the sensing signal of the first sensor.

Preferably, the green tire conveying system further comprises a second sensor for collecting the number of pallets on the return line, and the second sensor is electrically connected with the second transfer warehouse, so that the second transfer warehouse can compensate the deviation of the number of pallets on the return line based on a sensing signal of the second sensor.

Preferably, the conveyor lines are arranged in parallel, a first transfer table is connected between two adjacent conveyor lines, and the first transfer table is configured to transfer the trays between the two adjacent conveyor lines; and/or

The at least two return wires are arranged in parallel, a second transfer table is connected between every two adjacent return wires, and the second transfer table is configured to transfer the tray between every two adjacent return wires.

Preferably, a plurality of first temporary storage tables are connected to the side of the conveying line, and the first temporary storage tables are configured to temporarily store the trays on the conveying line; and/or

A plurality of second temporary storage tables are connected to the lateral sides of the return line and configured to temporarily store trays on the return line.

Preferably, the input end and the output end of the first rotary warehouse are respectively provided with a warehouse entry line and a warehouse exit line, more than two warehouse entry lines arranged in parallel are connected with the conveying line located at the upstream of the first rotary warehouse, and more than two warehouse exit lines arranged in parallel are connected with the conveying line located at the downstream of the first rotary warehouse.

Preferably, the folding portion of the conveying line and the folding portion of the return line are provided with folding mechanisms capable of conveying the trays in the folding direction of the conveying line and the folding direction of the return line, respectively.

Preferably, the return line is located at a lower level of the conveyor line, and the flow direction of the trays on the conveyor line is opposite to the flow direction of the trays on the return line.

Another object of the present invention is to provide a method for transporting a green tire based on the green tire transporting system, which can adjust the number of trays circulating in the green tire transporting system to match the working efficiency of the forming station and the vulcanizing station.

In order to achieve the purpose, the invention also adopts the following technical scheme:

a method for conveying a green tyre based on the system for conveying a green tyre as described above, comprising:

the first conveying device conveys the green tire output by the forming station to an empty tray supplied by a return line; a transfer device arranged at the side of the forming station transfers the pallet loaded with the green tires to the conveying line;

the second conveying device conveys the green tires supplied by the conveying line to a vulcanization station; a transfer device arranged at the side of the sulfur chemical station transfers the empty tray to the return line;

the first transfer warehouse receives and stores or outputs a specific number of trays based on the real-time number of the trays on the conveying line, so that the number of the trays on the conveying line is kept within a first preset number range; the second transfer warehouse stores or outputs a specific number of trays based on the number of trays on the return line in real time so as to keep the number of trays on the return line within a second preset number range;

wherein the first predetermined number range and the second predetermined number range are selected to match production efficiencies of the molding station and the curing station, respectively.

Preferably, the conveying method comprises:

the conveying lines are arranged in parallel, a first transfer table is connected between every two adjacent conveying lines, and trays are transferred between every two adjacent conveying lines through the first transfer table, so that the number of the trays on each conveying line is kept within the first preset number range; and/or

More than two the return wires set up side by side, adjacent two be connected with the second transfer platform between the return wire, through the second transfer platform is adjacent two pass through the tray between the return wire to make each the tray quantity on the return wire keeps in above-mentioned second predetermines the quantity within range.

The invention has the beneficial effects that:

according to the green tire conveying system and the green tire conveying method, the conveying line and the return line are arranged in a closed loop mode by means of the transfer device, the circular operation of the pallet can be achieved, and the manual input of carrying the pallet in modes of manpower or manual driving of a forklift and the like is avoided. The first turnover warehouse can compensate the quantity of the trays for the difference value between the real-time quantity of the trays on the conveying line and the quantity of the green tires required by the vulcanization station, so that the green tires to be vulcanized are prevented from being accumulated on the conveying line for a long time; the second transfer warehouse can compensate the quantity of the trays according to the difference value between the real-time quantity of the trays on the return line and the quantity of the green tires required by the molding station, so that the trays are prevented from being accumulated on the return line, and the condition that the empty trays flowing out of the return line are insufficient for output of the molding station is avoided.

Drawings

FIG. 1 is a schematic diagram of a tire blank conveying system according to an embodiment of the present invention;

FIG. 2 is a schematic side view of the conveyor line and the return line according to one embodiment of the present invention;

FIG. 3A is a schematic top view of a transfer device and a return line assembly;

fig. 3B is a schematic top view of a transfer device and a conveyor line in accordance with an embodiment of the present invention;

FIG. 4 is a schematic illustration of another alternative transfer device interfacing with a return line and a delivery line in accordance with one embodiment of the present invention;

FIG. 5 is a schematic illustration of the docking of another transfer device with a return line and a delivery line in accordance with one embodiment of the present invention;

fig. 6 is a schematic view of a matching structure of the first transfer table and the conveying line according to the first embodiment of the present invention;

FIG. 7 is a schematic view of a first staging platform and a conveyor line according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a green tire conveying system according to a second embodiment of the present invention;

FIG. 9 is a schematic view of a portion of another green tire conveying system according to a second embodiment of the present invention.

In the figure:

100. a forming station; 101. a forming machine; 102. a tire unloading channel;

200. a vulcanization station; 201. a vulcanizer; 202. an output line;

300. a tray;

400. a trolley; 401. a spreader;

500. a green tire;

1. a conveying line; 2. a return line; 3. a first carrying device; 31. a carrying track; 4. a second carrying device; 41. an annular track; 42. a series track; 43. resetting the track; 5. a transfer device; 51. a docking mechanism; 511. a first mating portion; 512. a second docking portion; 52. a lifting mechanism; 53. an extension mechanism; 54. a slope conveying mechanism; 55. a turnover mechanism; 6. a first turnaround bank; 61. a shelf; 62. a stacker; 63. a warehousing line; 64. taking out of the warehouse line; 7. a second turnaround; 8. a first transfer table; 9. a turning mechanism; 10. a first temporary storage table; 11. a first lifting device; 12. and a second lifting device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

Referring to fig. 1, the present embodiment provides a tire blank conveying system, which can be applied to a tire production factory, and is capable of conveying a tray 300 from a molding station 100 for molding a tire blank 500 to a vulcanizing station 200 for vulcanizing the tire blank 500, and conveying the tire blank 500 output from the molding station 100 to the vulcanizing station 200 by loading and unloading the tire blank 500 on the tray 300.

In order to enable the tray 300 to flow back to the forming station 100 for standby after being transported to the vulcanizing station 200, and to receive the green tire 500 again, the green tire conveying system provided by the embodiment specifically includes a conveying line 1, a return line 2, a first conveying device 3, a second conveying device 4, and a transfer device 5. Wherein the first conveying device 3 is arranged at the output end of the forming station 100 and is configured to convey the green tire 500 output by the forming station 100 to the empty tray 300 supplied by the return line 2; the second transfer device 4 is provided at an input end of the vulcanizing station 200, and is configured to transfer the green tire 500 supplied from the transfer line 1 to the vulcanizing station 200. Two transfer devices 5 are provided between the head end of the line 1 and the tail end of the return line 2 and between the tail end of the line 1 and the head end of the return line 2, respectively, the transfer devices 5 being configured to transfer the pallet 300 between the line 1 and the return line 2 to circulate the pallet 300 between the vulcanization station 200 and the molding station 100. Thus, the conveying line 1 and the return line 2 form a closed-loop conveying structure by means of the transfer device 5, so that the circulating operation of the pallet 300 can be realized, the manual input of carrying pallets in modes of manpower or manual driving of a forklift and the like is avoided, and meanwhile, the problem of reduction of the production work efficiency of the green tire 500 caused by accumulation of the pallet 300 in the vulcanization station 200 can be reduced or even avoided.

Specifically, the conveying line 1 and the return line 2 may employ a conveying mechanism such as a belt line or a chain conveying line capable of operating in one direction or two directions, and is not particularly limited depending on the structure of the tray 300. Taking the belt line as an example, a single belt line carried over a wide surface or a double belt line carried by a pair of belts together with the tray 300 may be specifically selected. In addition, in order to make full use of the space of the tire manufacturing plant, the feed line 1 and the return line 2 usually have a plurality of turning points, and the turning point of the feed line 1 and the turning point of the return line 2 are provided with turning mechanisms 9, respectively. The folding mechanism 9 ensures that the pallets are smoothly transported forward on the feed line 1 and the return line 2. The turning mechanism 9 may be any form that can realize the change of the conveying direction in the prior art, and is not limited in particular here. The first transporting device 3 and the second transporting device 4 can adopt an EMS trolley (electric monorail trolley, the trolley 400 is called below) and a lifting appliance adapted to the trolley 400, namely, the trolley 400 is used for lifting and transporting the green tire 500, so that the green tire 500 is moved into and out of the tray 300 in the green tire conveying system.

Taking the first transporting device 3 as an example, in the embodiment, the molding station 100 is provided with a plurality of molding machines 101 for molding the green tires 500 arranged side by side, the first transporting device 3 includes a carrying rail 31, a plurality of trolleys 400 are arranged on the carrying rail 31, each trolley 400 can slide along the rail to be vertically opposite to the tire unloading passage 102 of the molding machine 101, so as to lift the green tire 500 on the tire unloading passage 102 and then move and unload the green tire 500 to the empty tray 300 supplied by the return line 2, and then the trolley 400 is reset to wait for the next lifting operation. Of course, in other alternative embodiments, the first carrying device 3 and the second carrying device 4 may also adopt carrying equipment such as a robot arm, a crane, and the like, and are not limited herein.

Referring to fig. 2, in this embodiment, in order to reduce the occupied space and improve the space utilization, the conveyor line 1 and the return line 2 are stacked up and down, that is, the return line 2 is located at the lower layer of the conveyor line 1, and the flow direction of the tray on the conveyor line 1 is opposite to the flow direction of the tray on the return line 2. In fig. 1, a return line 2 blocked by the line 1 is provided below the line 1. Of course, in other alternative embodiments, the return line 2 may also be placed on the upper layer of the conveyor line 1. In order to adapt to the height difference of the molding station 100, the vulcanizing station 200 and other equipment, the conveying line 1 and the return line 2 can also be provided with a gradient for descending or lifting the height position. The arrows in fig. 1 and the other figures indicate the direction of the flow of the tray 300.

The two transfer devices 5 provided on the molding station 100 side and the vulcanizing station 100 side may have the same or different structures. The present invention provides several embodiments of the transfer device 5. The specific configuration of the transfer device 5 and the relationship between the transfer device 5 and the transfer line 1, the return line 2, and the first transfer device 3 will be described in detail with reference to the transfer device 5 disposed on the molding station 100 side as an example.

Fig. 3A and 3B show one embodiment of the transfer device 5. In this embodiment, the transfer device 5 includes: a docking mechanism 51, an extension mechanism 53, an epicyclic mechanism 55 and a lifting mechanism 52. When the transfer device 5 is disposed on the molding station 100 side, the docking mechanism 51 can dock flush with the return line 2 and transfer the empty pallet 300, and the docking mechanism 51 can also dock with the molding station 100 and transfer the green tire 500; the transfer mechanism 55 is provided in the lifting portion of the lifting mechanism 52 so as to be capable of abutting flush with the transfer line 1 and the return line 2, respectively, and transferring the pallet 300 loaded with the green tires 500; the extension mechanism 53 is connected in series between the docking mechanism 51 and the transfer mechanism 55, and/or between the transfer mechanism 55 and the conveying line 1; the extension mechanism 53 can receive and output the tray 300 with the green tire 500. The docking mechanism 51, the extension mechanism 53, and the turnaround mechanism 55 are similar in structure to the line 1 and the return line 2, and the turning mechanism 9 is also provided where the change of the conveying direction is involved.

Next, the operation of the transfer device 5 disposed on the molding station 100 side to transfer the tray in cooperation with the conveyor line 1, the return line 2, and the first transfer device 3 will be described in detail.

As shown in fig. 3A, when the empty pallet 300 flows to the end of the reflow line 2, the docking mechanism 51 receives the empty pallet 300 and waits in place until the first handling device 3 hangs the green tire 500 into the pallet 300; subsequently, the pallet 300 with the green tire 500 is conveyed to the transfer mechanism 55 through the extension mechanism 53; next, as shown in fig. 3B, the lifting mechanism 52 lifts the transfer mechanism 55 to a height position aligned with the conveyor line 1 so as to convey the pallet 300 loaded with the green tire 500 on the transfer mechanism 55 onto the conveyor line 1; after the above-described pallet 300 with green tires is transferred to the transfer line 1, the elevating mechanism 52 lowers the transfer mechanism 55 to a height position aligned with the return line 2. The direction of the arrow in fig. 3A and 3B is the direction of the circulation or conveyance of the tray 300 during this operation, wherein the conveyor line 1 above the return line 2 is hidden in fig. 3A in order to observe the direction of the circulation or conveyance of the tray 300 on the return line 2.

In the transfer process of the pallet 300, the transfer mechanism 55 provided on the lifting mechanism 52 is switched back and forth between the height position aligned with the return line 2 and the height position aligned with the conveyor line 1 to transfer the pallet 300 loaded with the green tires 500, and both the back and forth switching process and the process of separating the pallet 300 from the transfer mechanism 55 require time, which is an important factor affecting the transfer speed of the pallet. It should be noted that the extension mechanism 53 connected in series between the lifting mechanism 52 and the docking mechanism 51 can timely receive the tray 300 carrying the green tire conveyed by the docking mechanism 51, so as to allow the next empty tray 300 to be conveyed to the docking mechanism 51 to receive the green tire 500 conveyed by the first conveying device 3 from the molding station 100, thereby effectively shortening or even avoiding the operation idle period, timely storing the green tire produced by the molding station 100 into the transfer warehouse, and enabling the green tire conveying system to operate efficiently.

Suitably, when the transfer device 5 is adapted to the side of the vulcanizing station 200, the docking mechanism 51 is docked flush with the conveyor line 1 and transfers the tray 300 loaded with the green tire 500, and the docking mechanism 51 can also dock with the vulcanizing station 200 and transfer the green tire 500; the transfer mechanism 55 is provided in the lifting portion of the lifting mechanism 52 so that the transfer mechanism 55 can be aligned with the line 1 and the return line 2, respectively, and transfer the empty tray 300; the extension mechanism 53 is connected in series between the docking mechanism 51 and the revolving mechanism 55, and/or between the revolving mechanism 55 and the return line 2; the extension mechanism 53 is capable of receiving and outputting an empty tray 300. When the transfer device 5 is disposed at the side of the sulfur chemical industry 200, it cooperates with the conveying line 1, the return line 2 and the second conveying device 4 to complete the specific work process of tray transfer, which is not described herein again.

The extension mechanism 53 of the transfer device 5 on the side of the vulcanizing station 200 can function to timely transfer the empty tray 300 and timely supply the green tires to the vulcanizing station 200.

In the tray transfer process, the transfer mechanism 55 arranged on the lifting mechanism 52 is switched back and forth between the height position aligned with the return line 2 and the height position aligned with the conveying line 1 to realize the transfer of the tray loaded with the green tires, and the time is required in the back and forth switching process and the process of separating the tray from the transfer mechanism, so that the important factor influencing the transfer speed of the tray is provided. The arrangement of the extending mechanism 53, especially the extending mechanism 53 connected in series between the lifting mechanism 52 and the docking mechanism 51, can timely receive the tray 300 carrying the green tire conveyed by the docking mechanism 51, so as to allow the next empty tray 300 to be conveyed to the docking mechanism 51 to receive the green tire 500 conveyed by the first conveying device 3 from the molding station 100, thereby effectively shortening or even avoiding the operation idle period, timely storing the green tire produced by the molding station 100 into the transfer warehouse, and enabling the green tire conveying system to be rapidly circulated. The extension mechanism 53 in the transfer device 5 on the side of the vulcanization station 200 can play a role in timely transferring empty trays and supplying the green tires to the vulcanization station.

Referring to fig. 4, another alternative embodiment of a transfer device is provided. In this embodiment, the transfer device 5 on the molding station 100 side is provided to include a docking mechanism 51, an extension mechanism 53, and a ramp conveyor mechanism 54, wherein the docking mechanism 51 is docked flush with the return line 2 and transfers the empty tray 300, and the docking mechanism 51 is also capable of docking with the molding station 100 and transferring the green tire 500; the extension mechanism 53 is connected in series between the docking mechanism 51 and the slope conveying mechanism 54; the two ends of the slope conveying mechanism 54 are respectively butted with the conveying line 1 and the extension mechanism 53 to transfer the pallet 300 loaded with the green tire 500.

Suitably, the transfer device 5 on the side of the vulcanisation station 200 comprises: a docking mechanism 51, an extension mechanism 53, and a slope conveying mechanism 54; the docking mechanism 51 is in flush docking with the conveyor line 1 and transfers the pallet 300 carrying the green tire, and the docking mechanism 51 can also be in docking with the vulcanization station 200 and transfers the green tire 500; the extension mechanism 53 is connected in series between the docking mechanism 51 and the slope conveying mechanism 54; the slope conveying mechanism 54 is butted at both ends thereof with the return line 2 and the extension mechanism 53, respectively, to transfer the empty tray 300.

Referring to fig. 4, the operation of the transfer device 5, the transfer line 1, the return line 2, and the first conveying device 3 to transfer the pallet in cooperation with each other in the present embodiment will be briefly described by taking the transfer device 5 disposed at the molding station 100 as an example. When the empty pallet 300 reaches the end of the return line 2, the docking mechanism 51 receives the pallet 300 and waits in place until the first handling device 3 hangs the green tire 500 into the pallet 300; then, the pallet 300 with the green tires is conveyed to the lower end of the slope conveying mechanism 54 through the extending mechanism 53; the ramp conveyor 54 then continues to transport and lift the pallet 300 to its upper end, and finally transfers the pallet 300 with green tire 500 to the conveyor line 1. The direction of the arrow in fig. 4 is the direction of the flow of the tray 300 during this operation.

In contrast to the transfer device shown in fig. 3A and 3B, the transfer device shown in fig. 4 also has the docking mechanism 51 arranged to dock flush with the return line 2 and deliver the tray 300 and dock with the molding station 100 and receive the green tire 500; the ramp conveyor 54 replaces the lifting mechanism 52 described above to lift the pallet 300 to interface with the conveyor line 1 and transfer the pallet 300 to transfer the pallet 300 with the green tire 500 onto the conveyor line 1. It will be appreciated that the ramp conveyor 54 may continue to transport trays 300, advantageously reducing or even avoiding operational neutral, as compared to the elevator mechanism 52 which may only be used to load a particular number of trays 300 at a time. In addition, the ramp conveyor 54 is similar to the structure of the conveyor line 1 and the return line 2, and may be a common structure for realizing the conveyance in the prior art.

Referring to fig. 5, yet another alternative embodiment of a transfer device is provided. In this embodiment, the transfer device 5 is configured to include a docking mechanism 51 and a lifting mechanism 52, wherein the docking mechanism 51 can dock with the molding station 100 or the vulcanizing station 200 and transfer the green tire 500; the lifting mechanism 52 can lift the docking mechanism 51 to be flush-docked with the conveyor line 1 to transfer the pallet 300 loaded with the green tires 500, and can lower the docking mechanism 51 to be flush-docked with the return line 2 to transfer the empty pallet 300.

The docking mechanism 51 comprises a first docking part 511 and a second docking part 512, wherein the first docking part 511 is arranged at the movable end of the lifting mechanism 52 so as to be capable of being docked with the conveying line 1 and the return line 2 in a flush manner and transferring the tray 300; the second docking portion 512 is disposed flush with the reflow line 2, and when the first docking portion 511 is lowered to be flush with the reflow line 2, the second docking portion 512, the first docking portion 511 and the reflow line 2 are connected in series, and the second docking portion 512 can dock with the molding station 100 or the vulcanizing station 200 and transfer the green tire 500. Still taking the transfer device 5 disposed at the forming station 100 as an example, the working process of the transfer device 5 in cooperation with the conveying line 1, the return line 2 and the first carrying device 3 to complete tray transfer in the present embodiment will be briefly described. When the empty tray 300 reaches the end of the reflow line 2, the first docking portion 511 is lowered by the lifting mechanism 52 to be connected in series with the second docking portion 512 and the reflow line 2, and at this time, the tray 300 at the end of the reflow line 2 can flow to the second docking portion 512 through the first docking portion 511 and wait in situ, and the blank 500 is hung and loaded into the tray 300 by the first handling device 3; next, the second docking portion 512 reversely conveys the tray 300 back to the first docking portion 511; subsequently, the lifting mechanism 52 lifts the first docking portion 511 to be flush-docked with the conveyor line 1, so as to output the pallet 300 with the green tire 500 to the conveyor line 1, i.e. complete the docking process. The transfer device 5 is particularly suitable for the working conditions with limited arrangement space and low requirement on conveying speed.

When the molding station 100 and the vulcanizing station 200 are operated, the molding station 100 outputs the molded green tires 500 one by one continuously, and the vulcanizing station 200 receives the green tires in batches and periodically, so as to match the work efficiency of the two stations and avoid the long-term accumulation of the green tires 500 to be vulcanized on the conveyor line 1, the green tire conveying system provided by the embodiment further comprises a first transferring warehouse 6, the first transferring warehouse 6 is arranged at the middle section of the conveyor line 1, and the first transferring warehouse 6 is configured to receive and output the trays 300 with the green tires 500 transmitted upstream thereof so as to adjust the number of the trays 300 on the conveyor line 1.

Specifically, the green tire conveying system further includes a controller (not shown in the figure), which is electrically connected to the conveying line 1, the return line 2, the first and second conveying devices 3 and 4, the transfer device 5, the first transfer warehouse 6, and other functional structures, which will be described below, for supporting the operation of the green tire conveying system, so as to issue corresponding action execution signals to the functional structures, thereby participating in the whole operation process of the green tire conveying system and thus the forming and vulcanizing of the green tire 500. The controller includes, but is not limited to, one or a combination of more than two of a Warehouse Management System (WMS), a Warehouse Control System (WCS) and a Programmable Logic Controller (PLC). Next, taking the example of storing the trays 300 in the first turnaround 6, the warehousing management system can determine and issue the order information such as the number, position, and path of the trays 300 entering the warehouse (i.e. the first turnaround 6) according to the operation plan, the warehousing control system issues the corresponding order information to the programmable controller for controlling the operation of the conveyor line 1 and the first turnaround 6, and the programmable controller issues the order information to the conveyor line 1 and the first turnaround 6. The warehouse management system, the warehouse control system, the programmable controller, the related circuit structure, the control method, the communication arrangement, etc. are all the prior art, and are not described herein again.

In order to determine the specific number of the pallets 300 on the conveyor line 1 to be adjusted by the first rotary warehouse 6, the green tire conveying system further includes a first sensor (not shown) for acquiring the number of the pallets 300 on the conveyor line 1, and the first sensor is electrically connected to the first rotary warehouse 6, i.e., a controller for controlling the first rotary warehouse 6, so that the first rotary warehouse 6 can compensate the deviation of the number of the pallets 300 on the conveyor line 1 based on the sensing signal of the first sensor. It is understood that the deviation may be positive or negative, i.e. when the green tyre 500 is received or is about to be received by the vulcanisation station 200, the first transfer magazine 6 may compensate the number of pallets 300 based on the difference between the real time number of pallets 300 on the conveyor line 1 collected by the first sensor and the number of green tyres 500 required by the vulcanisation station 200.

In order to accurately measure the real-time quantity of the trays 300 on the conveying line 1, sensing elements such as photoelectric switches, proximity switches and pressure sensors used for detecting whether the trays 300 are located at corresponding positions can be arranged on the conveying line 1 in batches, and the controller calculates and judges the real-time quantity of the trays 300 on the conveying line 1 by collecting sensing signals of all the first sensors.

As mentioned above, the vulcanizing station 200 generally receives the embryos in batches and periodically, when the vulcanizing station 200 receives the embryo 500, the reflow line 2 will continuously receive a large amount of empty trays 300, and when the rate of the trays 300 on the reflow line 2 flowing into the molding station 100 is greater than the rate of the trays 300 flowing out of the molding station 100 (i.e. the rate of the embryo 500 output from the molding station 100), the number of the trays 300 on the reflow line 2 increases rapidly, which may even cause the trays 300 on the reflow line 2 to block and further cause the conveyor line 1 and the second conveying device 4 to be not smoothly connected, thereby affecting the production efficiency. When the tire blank 500 is temporarily received or received by a small amount at the vulcanizing station 200, the inflow rate of the tray 300 on the return line 2 is smaller than the outflow rate until the first conveying device 3 waits for the empty tray 300 from the return line 2 to place the tire blank 500 produced at the molding station 100, which also affects the production efficiency.

As shown in fig. 1, for this purpose, the present embodiment further includes a second transfer warehouse 7, which is disposed in the middle of the reflow line 2, and is configured to receive and output empty trays 300 conveyed from the upstream (the side of the vulcanization station 200) thereof, so as to adjust the number of trays 300 on the reflow line 2. Specifically, when the number of trays 300 on the return line 2 is too large, the second transfer warehouse 7 appropriately stores the trays 300 on the return line 2 to avoid the trays 300 from being accumulated on the return line 2, and when the number of trays 300 on the return line 2 is too small, the second transfer warehouse 7 appropriately outputs the trays 300 onto the return line 2 to avoid the empty trays 300 flowing out on the return line 2 from being insufficient for the output of the molding station 100.

Similarly to the first sensor, the green tyre delivery system may comprise a second sensor (not shown) for detecting the number of pallets 300 on the return line 2, which is required to be adjusted by the second transfer store 7, in electrical connection with the second transfer store 7, i.e. the controller for controlling the second transfer store 7, in order to determine the specific number of pallets 300 on the return line 2 to be adjusted by the second transfer store 7, so that the second transfer store 7 can compensate for deviations in the number of pallets 300 on the return line 2 based on the sensor signal of the second sensor. It is understood that the deviation may be positive or negative, and in order to accurately measure the real-time number of the trays 300 on the return line 2, the return line 2 may also be provided with a batch of sensing elements such as photoelectric switches, proximity switches, pressure sensors, etc. as second sensors for detecting the presence or absence of the tray 300 at the corresponding position, and the controller calculates and determines the real-time number of the trays 300 on the return line 2 by collecting the sensing signals of all the second sensors.

Further, the number of trays 300 on the return line 2 may be set to an appropriate number interval, and when the controller determines that the number of trays 300 on the return line 2 is smaller than the minimum value of the number interval, the controller controls the second transfer warehouse 7 to output the number of trays 300 corresponding to the number of the missing trays 300, and similarly, when the controller determines that the number of trays 300 on the return line 2 is larger than the maximum value of the number interval, the controller controls the second transfer warehouse 7 to receive the number of trays 300 corresponding to the number of the surplus trays 300, so as to complete the fast compensation of the number of trays 300 on the return line 2. Of course, the number of pallets 300 on the conveyor line 1 may also be controlled in this manner.

As shown in fig. 1, in this embodiment, the first turnaround 6 may be a three-dimensional warehouse, which includes a plurality of shelves 61 arranged at intervals and a stacker 62 disposed between adjacent shelves 61, where the shelves 61 have a plurality of storage structures arranged along the extending direction and the width direction thereof to store the trays 300 in batches. The input end and the output end of the first rotary warehouse 6 are respectively provided with a warehouse-in line 63 and a warehouse-out line 64, more than two warehouse-in lines 63 arranged in parallel are connected with the conveying line 1 positioned at the upstream (the forming station 100 side) of the first rotary warehouse 6, and more than two warehouse-out lines 64 arranged in parallel are connected with the conveying line 1 positioned at the downstream (the vulcanizing station 200 side) of the first rotary warehouse 6.

In this embodiment, two adjacent shelves 61, one stacker 62, one warehousing line 63, and one warehousing line 64 constitute a group of warehousing/warehousing operation units of the first rotary warehouse 6. The first circulation tank 6 may include more than two operation units, and each operation unit is arranged in sequence. Specifically, in each operation unit, the storage line 63 and the delivery line 64 are arranged at intervals, and the stacker 62 can slide between the storage line 63 and the delivery line 64 and between two adjacent shelves 61, so as to sequentially load the trays 300 by the storage line 63, the stacker 62 and the shelves 61 and sequentially output the trays 61, the stacker 62 and the delivery line 64.

In this embodiment, the specific structures of the warehousing line 63, the ex-warehouse line 64, the stacker 62 and the shelf 61 are the prior art and are not described herein again. It should be noted that the L-shaped bend of the line 1, the L-shaped bend of the return line 2, the bend of the transfer device 5, and the T-shaped connection between the line 1 and the store-in line 63 and the store-out line 64 need to be provided with a bending mechanism capable of conveying the tray 300 in a bending direction having a structure such as the line 1, the return line 2, and the transfer device 5. Referring to the prior art, the turning mechanism 9 may be a conveyor belt of a turning machine or a vertically-turning conveyor device having at least two perpendicular conveying directions, and the vertically-turning conveyor device may be a conveyor belt capable of being driven to turn vertically by a turning driving part, or a fork or the like extending in a specific direction to push against a tray is provided, and is not limited in detail herein.

Similarly to the first turnaround 6, the second turnaround 7 may also be provided as a stereoscopic warehouse with the above-mentioned operating units, and the second turnaround 7 may be allowed to have a smaller stock amount based on the actual adjustment amount of the trays 300 on the return line 2. The implementer can also make other similar structural arrangements based on the actual space conditions of the factory, and the arrangement is not limited herein.

In order to improve the conveying efficiency, the conveying line 1 and/or the return line 2 may be provided with two or more, and the two or more conveying lines 1/return lines 2 are arranged in parallel to convey the tray 300 together. Furthermore, as shown in fig. 1, the conveyor line 1 and/or the return line 2 may be arranged in a single section, and the remaining sections may be arranged in parallel, for example, two sections of the conveyor line 1 between the first rotary warehouse 6 and the vulcanizing station 200 and two sections of the return line 2 between the vulcanizing station 200 and the second rotary warehouse 7 are arranged in parallel, so as to meet the actual requirement of supplying the pallets 300 with the green tires 500 and returning the empty pallets 300 to the vulcanizing station 200 in batches.

Referring to fig. 6, in order to equally divide the number of the trays 300 on two or more adjacent conveyor lines 1 and/or return lines 2 arranged side by side and avoid the trays 300 from being accumulated on a certain conveyor line 1 and/or return line 2, a first transfer table 8 may be connected between the two conveyor lines 1, and the first transfer table 8 is configured to transfer the trays 300 between the two adjacent conveyor lines 1; a second relay station (not shown in the drawings) may also be connected between two adjacent return lines 2, and is located below the first relay station 8 and shielded by the first relay station 8, and configured to transfer the tray 300 between the two adjacent return lines 2. The first transfer platform 8 and the second transfer platform can be belt lines capable of conveying in two directions, and the turning mechanism 9 is arranged at the joint of the conveying line 1 and the first transfer platform 8 and the joint of the return line 2 and the second transfer platform. In addition, only one of the first transfer table 8 and the second transfer table may be provided, for example, only the first transfer table 8 may be provided between the feed line 1 and the return line 2, and the first transfer table 8 may be driven to be lifted and lowered by a lifting mechanism so that the first transfer table 8 is butted between the two feed lines 1 and between the two return lines 2, respectively.

Referring to fig. 1 and 7, in order to further reduce the accumulation of the trays 300 on the conveying line 1 and the return line 2 or supplement the trays 300 to the conveying line 1 and the return line 2, a plurality of first temporary storage tables 10 are connected to the side of the conveying line 1, and the first temporary storage tables 10 are configured to temporarily store the trays 300 on the conveying line 1; a plurality of second temporary storage tables (not shown) are connected to the lateral sides of the reflow line 2, and are shielded by the first temporary storage table 10, and the second temporary storage tables are configured to temporarily store the trays 300 on the reflow line 2. The first buffer station 10 and the second buffer station may be alternatively or simultaneously provided, as desired. The first and second temporary storage tables 10 and 10 may be a conveying mechanism capable of conveying and carrying the tray 300 bidirectionally.

Referring to fig. 1, in order to increase the speed of the vulcanizing operation and avoid the occurrence of the concentrated supply and output of the pallet 300, in this embodiment, the vulcanizing stations 200 may be set to be more than two, and more than two vulcanizing stations 200 may perform the staggered operation, that is, when a part of the vulcanizing stations 200 are in the vulcanizing operation, another part of the vulcanizing stations 200 just complete the vulcanizing operation to supplement the green tire 500, so that the green tire conveying system continuously circulates, and the peak period or the valley period of the conveying amount of the pallet 300 is avoided. Further, each vulcanizing station 200 may further include two rows of vulcanizing machines 201, and the vulcanizing machines 201 may also be staggered to produce. Furthermore, all the vulcanizing machines 201 in each vulcanizing station 200 may be arranged in two rows, an output line 202 is disposed between the two rows of vulcanizing machines 201, and the output line 202 can receive the completely vulcanized embryos output by the vulcanizing machines 201 to continuously convey the completely vulcanized embryos to the next station.

In order to convey the green tires 500 supplied by the conveyor line 1 to the tire storage stations of the respective vulcanizing machines 201, in this embodiment, the second handling device 4 includes annular rails 41 and serial rails 42, the number of the annular rails 41 is the same as that of the vulcanizing stations 200, the annular rails are arranged around the periphery of each vulcanizing station 200, a plurality of trolleys 400 capable of traveling along the annular rails 41 are suspended on each annular rail 41, and the trolleys 400 are capable of lifting the green tires 500 output by the conveyor line 1 and unloading the green tires 500 to the tire storage stations of the respective vulcanizing machines 201; the tandem track 42 is connected to all the circular tracks 41 to serially connect all the circular tracks 41, and a plurality of spare trolleys 400 are parked on the tandem track 42.

By means of the structure, the circular rail 41 can allow the trolleys 400 to operate one by one circularly to carry the green tires 500, when the design production efficiency is lower than that and all the trolleys 400 are not needed to operate, redundant trolleys 400 can be moved to the series rail 42 for standby, and when the design production efficiency is higher than that, standby trolleys 400 can be supplemented to adapt to the accelerated production efficiency, so that the bottleneck of the production efficiency is broken through. Meanwhile, the arrangement of the tandem track 42 enables the spare trolley 400 to move to each circular track 41 for temporary replacement or supplement operation, thereby avoiding the arrangement of the spare trolley 400 on each circular track 41, improving the utilization rate of the spare trolley 400, reducing unnecessary expenditure for repeatedly arranging the spare trolleys 400, and reducing the control difficulty of the second handling device 4 due to the reduction of the number of the spare trolleys 400. Alternatively, the spare cart 400 may be parked at the head end and/or tail end of the tandem track 42.

Preferably, in this embodiment, all the vulcanizing stations 200 are arranged in a line, all the circular rails 41 are arranged at the same level at the end close to the conveying line 1, and the tandem rail 42 is connected to the end of the circular rail 41 close to the conveying line 1, so that the standby trolley 400 can be moved to the hoisting position butted with the conveying line 1 in a shorter distance.

In order to facilitate the return of the spare vehicle 400 to the parking position, the green tyre conveying system further comprises a return rail 43, the return rail 43 being connected between the end of each circular rail 41 facing away from the conveyor line 1 and the tandem rail 42 so as to reduce interference with other vehicles 400 normally used in the travel path.

In summary, the present embodiment further provides a method for transporting a green tire, which can adjust the number of trays 300 circulating in the green tire transporting system to match the working efficiency of the forming station 100 and the vulcanizing station 200. The conveying method comprises the following steps:

s1, the first transfer device 3 transfers the green tire 500 delivered from the molding station 100 to the empty tray 300 supplied from the return line 2, and the transfer device 5 provided on the molding station 100 side transfers the tray 300 carrying the green tire 500 to the transfer line 1; the second conveying device 4 conveys the green tire 500 supplied by the conveyor line 1 to the vulcanization station 200; the transfer device 5 provided on the side of the vulcanization station 200 transfers the empty tray 300 onto the return line 2;

s2, the first turnaround 6 stores or outputs a specific number of pallets 300 in real time based on the number of pallets 300 on the conveyor line 1, so that the number of pallets 300 on the conveyor line 1 is kept within a first preset number range (i.e. the number interval applicable to the pallets 300 on the conveyor line 1); the second transfer stocker 7 stores or outputs a specific number of trays 300 in real time based on the number of trays 300 on the return line 2, so that the number of trays 300 on the return line 2 is kept within a second preset number range (i.e., the above-mentioned number range applicable to the trays 300 on the return line 2);

wherein the first predetermined number range and the second predetermined number range are selected to match the production efficiency of the forming station 100 and the curing station 200, respectively.

Further, the conveying method further comprises the following steps:

the conveying lines 1 are arranged in parallel, a first transfer table 8 is connected between every two adjacent conveying lines 1, and the pallets 300 are transferred between every two adjacent conveying lines 1 through the first transfer table 8, so that the quantity of the pallets 300 on each conveying line 1 is kept within the first preset quantity range; alternatively or additionally, more than two return lines 2 are arranged in parallel, a second transfer station is connected between two adjacent return lines 2, and trays 300 are transferred between two adjacent return lines 2 through the second transfer station, so that the number of trays 300 on each return line 2 is kept within the first preset number range.

Example two

Referring to fig. 8, the green tire conveying system of the present embodiment is substantially the same as the first embodiment, except that a different structure is adopted to adjust the number of the trays 300 circulating in the green tire conveying system. In this embodiment, only one transfer warehouse (i.e. the first transfer warehouse 6) is provided, and the second transfer warehouse 7 is not provided, and accordingly, the transfer warehouse is configured to receive and output the pallets 300 with the green tires 500 transferred from the transfer line 1, so as to adjust the number of the pallets 300 on the transfer line 1; the turnaround may also be configured to store and output empty trays 300 transported from the return line 2 to adjust the number of trays 300 on the return line 2.

Specifically, the input end and the output end of the turnover warehouse are respectively provided with a warehousing line 63 for receiving the trays 300 and an ex-warehouse line 64 for outputting the trays 300, wherein a pair of warehousing lines 63 are stacked up and down (the warehousing line 63 positioned below is shielded by the warehousing line 63 positioned above in fig. 8), and are respectively connected with the conveying line 1 and the return line 2; a pair of delivery lines 64 are stacked one on top of the other (the delivery line 64 positioned below is blocked by the delivery line 64 positioned above in fig. 8), and are connected to the line 1 and the return line 2, respectively. The pair of stock lines 63 are butted against the line 1 and the return line 2 by the above-mentioned folding mechanism, and the pair of stock discharge lines 64 are butted against the line 1 and the return line 2 by the above-mentioned folding mechanism.

Taking the adjustment of the number of trays 300 on the return line 2 as an example, when the number of trays 300 on the return line 2 is normal, the conveying direction of the folding mechanism at the joint of the return line 2 and the lower-layer warehousing line 63 is controlled by the controller and is set as the return line 2 in normal operation; when the number of the trays 300 on the return line 2 is excessive, the conveying direction of the folding mechanism is controlled and switched by the controller, so that the trays 300 on the return line 2 flow to the lower-layer warehousing line 63 and further flow to the turnover warehouse for storage through the lower-layer warehousing line 63; when the number of trays 300 on the return line 2 is too small, the turnaround section delivers an appropriate number of empty trays 300 to the return line 2 via the lower delivery line 64, and the conveying direction of the turning mechanism at the point where the return line 2 and the lower deposit line 63 meet is controlled by the controller and set to normal operation so that the trays 300 are continuously conveyed downstream of the return line 2. The adjustment of the number of the trays 300 on the conveying line 1 is the same as the above adjustment method, and is not described herein again.

It should be noted that, compared to the first turnaround magazine 6 in the first embodiment, the turnaround magazine in this embodiment not only stores the pallets 300 loaded with the green tires 500, but also stores the empty pallets 300, so that the number of pallets 300 in the transfer line 1 and the return line 2 can be adjusted.

As another alternative embodiment, as shown in fig. 9, the input and output ends of the turnover library are provided with an input line 63 for receiving a tray 300 and an output line 64 for outputting the tray 300, respectively; the green tyre conveying system further comprises a first lifting device 11, the first lifting device 11 being configured to transfer the empty pallet 300 on the return line 2 onto the conveyor line 1, so that the empty pallet 300 can enter the turnaround via the entry line 63; the green tyre transport system further comprises a second lifting device 12, the second lifting device 12 being configured to carry empty pallets 300 output via the outfeed line 64 onto the return line 2. That is, in the present embodiment, the stock line 63 and the stock discharge line 64 are both single-layer mechanisms, and are connected only to the line 1, and the empty trays 300 are transferred between the line 1 and the return line 2 stacked vertically by the first lifting device 11 and the second lifting device 12, and the empty trays 300 are discharged or put into the turnaround, so that the number of trays 300 on the return line 2 is adjusted.

Preferably, since the unloading line 64 is used for unloading both the pallets loaded with green tires and the empty pallets, in this alternative embodiment, the green tire conveying system further comprises a third sensor (not shown) for identifying whether the pallet 300 unloaded from the unloading line 64 is loaded with green tires 500, and the third sensor is electrically connected to the second lifting device 12 through the controller. When the third sensor recognizes that the empty tray 300 is output on the delivery line 64, the second lifting device 12 receives the empty tray 300 and transfers it to the return line 2. The third sensor may refer to the first sensor and the second sensor, and is not described herein.

In summary, different from the first embodiment, the method for conveying a green tire conveying system provided by the second embodiment includes:

s2, the turnaround warehouse stores or outputs a specific number of pallets 300 in real time based on the number of pallets 300 on the conveyor line 1, so that the number of pallets 300 on the conveyor line 1 is kept within a first preset number range (i.e. the number interval applicable to the pallets 300 on the conveyor line 1); and stores or outputs a specific number of trays 300 based on the number of trays 300 on the return line 2 in real time, so that the number of trays 300 on the return line 2 is kept within a second preset number range (i.e., the number interval applicable to trays 300 on the return line 2);

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A green tyre conveying system for conveying a tray (300) between a forming station (100) and a vulcanisation station (200) for conveying a green tyre (500) output by the forming station (100) to the vulcanisation station (200) by means of the tray (300), characterised in that it comprises:

a conveying line (1) and a return line (2), wherein transfer devices (5) are respectively arranged between the head end of the conveying line (1) and the tail end of the return line (2) and between the tail end of the conveying line (1) and the head end of the return line (2), and the transfer devices (5) are configured to transfer trays (300) between the conveying line (1) and the return line (2) so as to circularly convey the trays (300) between the vulcanization station (200) and the forming station (100);

a first handling device (3) arranged at the output of the forming station (100), the first handling device (3) being configured to handle the green tyre (500) output by the forming station (100) to an empty tray (300) supplied by the return line (2);

a second handling device (4) arranged at the input end of the vulcanization station (200), the second handling device (4) being configured to handle the green tire (500) supplied by the conveyor line (1) to the vulcanization station (200);

a first transfer warehouse (6) arranged at the middle section of the conveyor line (1), wherein the first transfer warehouse (6) is configured to store and output the pallets (300) with the green tires conveyed from the upstream so as to adjust the number of the pallets (300) on the conveyor line (1); and

a second transfer store (7) disposed in the middle of the return line (2), wherein the second transfer store (7) is configured to store and output empty trays (300) transferred upstream thereof so as to adjust the number of trays (300) on the return line (2).

2. Green tyre conveying system according to claim 1, characterized in that it further comprises a first sensor for acquiring the number of pallets (300) on the conveyor line (1), said first sensor being electrically connected to the first carousel store (6) so that the first carousel store (6) can compensate for deviations in the number of pallets (300) on the conveyor line (1) based on the sensor signal of the first sensor.

3. Embryo transfer system according to claim 1, further comprising a second sensor for acquiring the number of trays (300) on the return line (2), the second sensor being electrically connected to the second transfer store (7) so that the second transfer store (7) can compensate for deviations in the number of trays (300) on the return line (2) based on a sensor signal of the second sensor.

4. The green tire conveying system of claim 1, wherein:

the conveying line conveying method comprises the following steps that more than two conveying lines (1) are arranged in parallel, a first transfer table (8) is connected between every two adjacent conveying lines (1), and the first transfer table (8) is configured to transfer trays (300) between every two adjacent conveying lines (1); and/or

The at least two return wires (2) are arranged in parallel, a second transfer table is connected between two adjacent return wires (2), and the second transfer table is configured to transfer the tray (300) between the two adjacent return wires (2).

5. The green tire conveying system of claim 1, wherein:

a plurality of first temporary storage tables (10) are connected to the lateral side of the conveying line (1), and the first temporary storage tables (10) are configured to temporarily store trays (300) on the conveying line (1); and/or

The side of return wire (2) is connected with a plurality of second temporary storage platforms, second temporary storage platform is configured as the tray (300) of temporary storage on return wire (2).

6. Tyre transferring system according to claim 1, characterised in that the input and output ends of said first carousel (6) are provided with an entry line (63) and an exit line (64), respectively, two or more of said entry lines (63) arranged side by side being connected to said conveying line (1) upstream of said first carousel (6), and two or more of said exit lines (64) arranged side by side being connected to said conveying line (1) downstream of said first carousel (6).

7. Green tyre conveying system according to claim 1, characterized in that the turning of the conveyor line (1) and the turning of the return line (2) are provided with turning mechanisms capable of conveying trays (300) in the turning direction of the conveyor line (1) and the turning direction of the return line (2), respectively.

8. Green tyre conveying system according to any one of claims 1 to 7, characterized in that the return line (2) is positioned at the lower level of the conveyor line (1), the flow direction of the trays (300) on the conveyor line (1) being opposite to the flow direction of the trays (300) on the return line (2).

9. A method for conveying a green tyre based on a system for conveying a green tyre according to any one of claims 1 to 8, characterized in that it comprises:

a first conveying device (3) conveys the green tires (500) output by the molding station (100) to an empty tray (300) supplied by a return line (2); a transfer device (5) arranged at the side of the forming station (100) transfers the pallet (300) loaded with the green tire (500) to the conveying line (1); the second conveying device (4) conveys the green tires (500) supplied by the conveying line (1) to a vulcanization station (200); a transfer device (5) arranged on the side of the vulcanization station (200) transfers the empty tray (300) to the return line (2);

the first transfer warehouse (6) is used for storing or outputting the trays (300) based on the real-time quantity of the trays (300) on the conveying line (1), so that the quantity of the trays (300) on the conveying line (1) is kept within a first preset quantity range; the second transfer warehouse (7) stores or outputs the trays (300) based on the real-time quantity of the trays (300) on the return line (2), so that the quantity of the trays (300) on the return line (2) is kept within a second preset quantity range;

wherein the first predetermined number range and the second predetermined number range are selected to match production efficiencies of the forming station (100) and the curing station (200), respectively.

10. The delivery method of claim 9, comprising:

the conveying lines (1) are arranged in parallel, a first transfer table (8) is connected between every two adjacent conveying lines (1), and the trays (300) are transferred between every two adjacent conveying lines (1) through the first transfer table (8), so that the number of the trays (300) on each conveying line (1) is kept within the first preset number range; and/or

The device comprises more than two backflow lines (2), a second transfer table is connected between every two adjacent backflow lines (2), and trays (300) are transferred between every two adjacent backflow lines (2) through the second transfer table, so that the number of the trays (300) on each backflow line (2) is kept within the second preset number range.