Method for automatic cyclic feeding of hot press

Abstract

The application discloses a kind of automatic cyclic feeding hot-pressing method, comprising the following steps: S10, locate the pallet in the feeding and discharging station, and place the workpiece on the pallet;S20, first transfer module draws the pallet that has been placed to standby position positioning;S30, first transfer module feeds, while, the pallet to be loaded moves to the feeding and discharging station;S40, first transfer module returns to standby position, and second transfer module moves to the discharge end of hot-pressing mechanism standby;S50, first transfer module feeds again, while, second transfer module takes material;S60, second transfer module moves back to the feeding and discharging station, and first transfer module returns standby, repeat steps S10 to S50.The application sets one feeding and discharging station, and first transfer module and second transfer module are driven by PLC controller to realize the operation of providing automatic feeding and taking material for multiple hot-pressing mechanisms, reduce labor intensity, improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of workpiece hot pressing technology, and in particular to an automatic cyclic feeding and hot pressing method. Background Technology

[0002] In the production process of mobile phone or laptop components, especially during hot pressing, the workpieces need to be manually placed on the fixture before being processed by the hot press, and finally removed and placed back. Usually, one operator controls one hot press. As production increases, the operator's labor intensity will increase, and quality accidents are easily caused by operational errors, thus affecting the operator's production efficiency and safety. On the other hand, increasing the number of equipment and operators will significantly increase the company's processing costs. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an automatic cyclic feeding and hot pressing method that is convenient for material handling and can meet the requirements of simultaneous processing at multiple workstations.

[0004] To solve the above-mentioned technical problems, the present invention provides an automatic cyclic feeding and hot pressing method, wherein a first transfer module and a second transfer module connected to a PLC controller are used to load the workpiece to the hot press position and remove the hot-pressed workpiece, comprising the following steps:

[0005] S10. Position the pallet at the loading / unloading station and place the workpiece on the pallet;

[0006] S20. The first transfer module pulls out the tray with the material already placed and positions it in the standby position.

[0007] S30. The first transfer module pulls the already unloaded pallet to the hot pressing mechanism for loading, while the second transfer module pushes the pallet to be unloaded to the loading / unloading station.

[0008] S40, The first transfer module returns to the standby position, and the second transfer module moves to the discharge end of the hot pressing mechanism to standby;

[0009] S50, the first transfer module pulls out the tray with the material already placed to the hot pressing mechanism position again, and at the same time, the second transfer module pulls out the tray to be picked up from the hot pressing mechanism and moves back to the standby position;

[0010] S60, the second transfer module pushes the pallet to be picked up to the loading and unloading station, the first transfer module returns to its position to wait, and steps S10 to S50 are repeated.

[0011] The upper and lower feeding station comprises a first chain unlocking cylinder, a first positioning cylinder, a first damping cylinder, a first deceleration position sensor, a first stop position sensor and a second tool to position sensor; the first moving and loading module comprises a first support plate, wherein a first chain driving motor, a third positioning cylinder, a third deceleration position sensor and a third stop position sensor are arranged on the first support plate; in the step S20, the following sub-steps are included:

[0012] S201, artificial feeding is completed, the start switch is pressed, the PLC controller in the control cabinet starts the first positioning cylinder, the first positioning pin is separated from the positioning seat, when the first chain reaches the first deceleration position sensor, the first chain driving motor is decelerated, when the first chain reaches the first stop position sensor, the first chain driving motor is decelerated and stopped, at this time, the first chain hook is connected with the corresponding end of the chain hook seat;

[0013] S202, the first chain driving motor is started in reverse rotation to wind back the first chain, and the first chain pulls the moved feeding tray away from the upper and lower feeding station;

[0014] S203, when the first chain reaches the third deceleration position sensor, the first chain driving motor is decelerated, when the first chain reaches the third stop position sensor, the first chain driving motor is decelerated and stopped, and a part of distance is still moved during the deceleration and stop process, when the first tool to position sensor detects that the feeding tray is in position, the third positioning cylinder extends the third positioning pin to insert into the positioning seat to realize positioning.

[0015] By using the above operation steps, the control cabinet sends instructions to drive two moving and loading modules, so that the two moving and loading modules move the workpiece fixture in sequence, the first moving and loading module realizes cyclic feeding between the upper and lower feeding station and the hot pressing mechanism, and the second moving and loading module realizes cyclic feeding between the hot pressing mechanism and the upper and lower feeding station, that is, one operator can realize cyclic feeding and feeding of multiple hot pressing stations, which not only ensures production efficiency, but also greatly saves cost and is convenient to operate.

[0016] In order to facilitate orderly feeding of the hot pressing mechanism, as a preferred, the first moving and loading module further comprises a tool number reader, and a distance sensor is arranged at the position of the hot pressing mechanism, when the distance sensor detects that the hot pressing mechanism does not have a feeding tray, a signal is sent to the PLC controller, the PLC controller sends an instruction to the tool number reader, and the reading mode of the tool number reader is read from low to high according to binary coding, that is, the first moving and loading die feeds the processing station of the hot pressing mechanism in turn according to the reading order.

[0017] In order to facilitate the step-by-step movement of the first transfer module, as preferred, the first transfer module further comprises a first driving lead screw capable of moving the first support plate, and the second transfer module comprises a second support plate, wherein a second chain drive motor, a fourth positioning cylinder, a fourth deceleration position sensor, a fourth stop position sensor, and a second driving lead screw capable of moving the second support plate are arranged on the second support plate, and in the S30 step, the following sub-steps are included:

[0018] S301, the first driving lead screw drives the first support plate to the hot pressing mechanism position;

[0019] S302, the PLC controller starts the first chain drive motor, and the first chain pushes the loaded tray to the corresponding station of the hot pressing mechanism for feeding;

[0020] S303, the first chain drive motor starts reverse rotation to wind back the first chain, and the first driving lead screw drives the first support plate to move back to the standby position;

[0021] S304, the PLC controller starts the fourth positioning cylinder, the fourth positioning pin is separated from the positioning seat, and then the second chain drive motor is started, the second chain is extended and pushes the tray to be fed to the feeding and discharging station.

[0022] In order to facilitate the feeding of the hot pressing station, as preferred, the hot pressing mechanism comprises a second chain unlocking cylinder, a second positioning cylinder, a second damping cylinder, a second deceleration position sensor, a second stop position sensor, and a second tool position sensor, and in the S302 step, the following sub-steps are included:

[0023] S3021, when the first chain reaches the second deceleration position sensor, the first chain drive motor slows down, and when it reaches the second stop position sensor, the first chain drive motor slows down and stops, and during the deceleration and stop process, it still moves a certain distance, at this time, the PLC controller starts the second damping cylinder, and the second damping block is extended to abut the lower end surface of the loaded tray, thereby increasing the friction of the loaded tray;

[0024] S3022, when the second tool position sensor detects that the loaded tray is in position, the second positioning cylinder extends the third positioning pin to insert into the positioning seat to realize positioning.

[0025] S3023, the second chain unlocking cylinder is started to release the connection between the first chain and the chain hook seat, and the first chain drive motor starts reverse rotation to wind back the first chain.

[0026] In order to facilitate the feeding and discharging station to move the tray, as preferred, in the S304 step, the following sub-steps are included:

[0027] S3041, the PLC controller starts the fourth positioning cylinder, the fourth positioning pin is separated from the positioning seat on the to-be-discharged pallet, and the PLC controller starts the second chain drive motor again. The second chain drives the to-be-discharged pallet to move to the feeding and discharging station;

[0028] S3042, when the second chain reaches the first deceleration sensor position, the second chain drive motor is decelerated, and when the second chain drive motor reaches the first stop sensor, the second chain drive motor is decelerated and stopped. The deceleration and stop process still moves a part of the distance. At this time, the PLC controller starts the first damping cylinder, and the first damping block is extended to abut against the lower end surface of the to-be-discharged pallet, thereby increasing the friction of the to-be-discharged pallet.

[0029] S3043, when the second tooling at the feeding and discharging station position detects that the to-be-discharged pallet is in place, the first positioning cylinder extends the first positioning pin into the positioning seat of the to-be-discharged pallet to achieve positioning.

[0030] S3044, the first chain unlocking cylinder is started to release the connection between the second chain and the chain hook seat, and the second chain drive motor is started in reverse rotation to wind back the second chain.

[0031] In order to facilitate the taking out of the processed workpiece by the hot pressing mechanism, in the S50 step, the following sub-steps are included:

[0032] S501, the first moving module in standby position pulls out the discharged pallet to the hot pressing mechanism position again, which is the same as the steps S20 to S30;

[0033] S502, the PLC controller starts the second positioning cylinder, the second positioning pin is separated from the positioning seat, and the second chain drive motor is started. When the second chain reaches the second deceleration sensor position, the second chain drive motor 54 is decelerated. When the second chain drive motor reaches the second stop sensor, the second chain drive motor is decelerated and stopped. At this time, the second chain hook is connected to the corresponding end of the chain hook seat on the to-be-taken pallet.

[0034] S503, the second chain drive motor is started in reverse rotation to wind back the second chain, and the second chain pulls the to-be-taken pallet away from the hot pressing mechanism;

[0035] S504, when the second chain reaches the fourth deceleration sensor position, the second chain drive motor is decelerated, and when the second chain drive motor reaches the fourth stop sensor, the second chain drive motor is decelerated and stopped. The deceleration and stop process still moves a part of the distance. When the first tooling at position sensor on the second moving module detects that the to-be-taken pallet is in place, the fourth positioning cylinder extends the fourth positioning pin into the positioning seat of the to-be-taken pallet to achieve positioning.

[0036] S505, the second drive lead screw pushes the second support plate back to the standby position, and the to-be-taken pallet is taken.

[0037] In order to facilitate the material taking on the support plate, preferably, air inlet and air outlet which are communicated with the stripping cylinder are arranged on the support plate, the output end of the stripping cylinder is provided with a stripping plate; the second moving module further comprises a driving cylinder arranged on the second support plate, the output end of the driving cylinder is provided with an air charging block communicated with the air pump, the air charging block is provided with a first air port communicated with the air inlet and a second air port communicated with the air outlet, and in the S505 step, the following sub-steps are included:

[0038] S5051, the PLC controller starts the driving cylinder to drive the air charging block to move upward and abut against the lower end surface of the second support plate, at this time, the first air port is communicated with the air inlet, and the second air port is communicated with the air outlet, the PLC controller then starts the air pump, the gas is injected into the stripping cylinder through the air inlet, the stripping cylinder is pushed upward under the action of the gas pressure, and the stripping plate pushes upward the jig which is moved downward on the support plate due to hot pressing processing, so that the operator takes out the processed workpiece;

[0039] S5052, then, the air pump is started to suck back the gas, the gas returns to the air pump through the air outlet, meanwhile, the PLC controller starts the driving cylinder again to drive the air charging block to move downward, the fourth positioning cylinder is started by the PLC controller, the fourth positioning pin is separated from the positioning seat, and the second chain drive motor is started again, the second chain is stretched out and pushes the support plate to be discharged to move to the feeding and discharging station.

[0040] In order to realize the orderly material taking of the hot pressing mechanism, preferably, the second moving module is also provided with a tool number reader, when the hot pressing is completed, the hot pressing machine is lifted, the distance sensor detects that the hot pressing machine is close, and a signal is sent to the PLC controller, the PLC controller gives an instruction to the tool number reader in the second moving module, the reading mode of the tool number reader is according to binary coding to read from low to high, namely, the second moving die takes the material from the processing station of the hot pressing mechanism in sequence according to the reading order.

[0041] Beneficial effects: the feeding and discharging station is arranged, the first moving module and the second moving module are driven by the PLC controller to realize the automatic feeding and material taking of the plurality of hot pressing mechanisms, the labor intensity is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0043] Figure 1 The use principle diagram of the present application

[0044] Figure 2 A schematic diagram of the device structure of the application.

[0045] Figure 3 A schematic diagram of the device structure of the application. Figure 2 A schematic diagram of the device structure of the application.

[0046] Figure 4 A schematic diagram of the device structure of the application. Figure 2 A schematic diagram of the device structure of the application.

[0047] Figure 5 A schematic diagram of the device structure of the application. Figure 4 A schematic diagram of the device structure of the application.

[0048] Figure 6 A schematic diagram of the device structure of the application.

[0049] Figure 7 A schematic diagram of the device structure of the application. Figure 6 A schematic diagram of the device structure of the application.

[0050] Figure 8 A schematic diagram of the device structure of the application.

[0051] Figure 9 A schematic diagram of the device structure of the application. Figure 8 A schematic diagram of the device structure of the application.

[0052] Figure 10 A schematic diagram of the device structure of the application.

[0053] Figure 11 A schematic diagram of the device structure of the application. Figure 10 A schematic diagram of the device structure of the application.

[0054] Figure 12 A schematic diagram of the device structure of the application.

[0055] Figure 13 A schematic diagram of the device structure of the application.

[0056] Figure 14 A schematic diagram of the device structure of the application. Figure 13 A schematic diagram of the device structure of the application.

[0057] Figure 15 A schematic diagram of the device structure of the application.

[0058] The meanings of the various reference numerals in the drawings are as follows:

[0059] Control cabinet - 1; base plate - 11;

[0060] Loading and unloading station-2; first rail frame-21; first guide block-211; first guide groove-212; first guide rail-22; supporting plate-23; stripping air cylinder-231; stripping plate-232; air inlet-233; air outlet-234; positioning seat-235; chain hook seat-24; first chain unlocking air cylinder-25; first connecting plate-251; first chain hook yoke-252; first deceleration position sensor-261; first stop position sensor-262; first positioning air cylinder-271; first positioning pin-2711; first damping air cylinder-281; first damping block-2811;

[0061] Hot pressing mechanism-3; human-computer interaction control panel-30; second rail frame-31; second guide block-311; second guide groove-312; second guide rail-32; second chain unlocking air cylinder-33; second connecting plate-331; second chain hook yoke-332; second deceleration position sensor-341; second stop position sensor-342; second positioning air cylinder-351; second positioning pin-3511; second damping air cylinder-361; second damping block-3611;

[0062] First sliding rail-41; first support plate-411; first driving lead screw-42; third guide rail-43; third guide groove-431; first chain drive motor-44; first chain-441; first chain hook-442; third positioning air cylinder-45; third positioning pin-451; third deceleration position sensor-461; third stop position sensor-462;

[0063] Second sliding rail-51; second support plate-511; second driving lead screw-52; fourth guide rail-53; fourth guide groove-531; second chain drive motor-54; second chain-541; second chain hook-542; fourth positioning air cylinder-55; fourth positioning pin-551; driving air cylinder-56; inflation block-561; first air port-5611; second air port-5612; fourth deceleration position sensor-571; fourth stop position sensor-572;

[0064] Protective cover-6; tool number reader-71; first tool to position sensor-721; second tool to position sensor-722. DETAILED DESCRIPTION

[0065] By Figures 1 to 14As shown, the workpiece automatic circulation feeding and hot pressing device of the present application comprises a control cabinet 1, an upper and lower feeding station 2 arranged on and connected with the control cabinet 1, and at least one hot pressing mechanism 3 arranged on and connected with the control cabinet 1, a first transfer module connected with the control cabinet 1 is arranged on one side of the upper and lower feeding station 2, and a second transfer module connected with the control cabinet 1 is arranged on the other side of the upper and lower feeding station 2, for feeding the workpiece to the hot pressing mechanism position and taking out the workpiece after hot pressing,

[0066] comprising the following steps:

[0067] S10, positioning the pallet 23 at the upper and lower feeding station 2, and placing the workpiece on the pallet 23;

[0068] S20, the first transfer module pulls out the loaded pallet 23 to a standby position;

[0069] S30, the first transfer module pulls the loaded pallet 23 to the upper and lower feeding station 2, and the second transfer module pushes the pallet 23 to the upper and lower feeding station 2;

[0070] S40, the first transfer module returns to the standby position, and the second transfer module moves to the hot pressing mechanism 3 to standby;

[0071] S50, the first transfer module pulls out the loaded pallet 23 to the hot pressing mechanism 3, and the second transfer module pulls out the pallet 23 from the hot pressing mechanism 3 and returns to the standby position;

[0072] S60, the second transfer module pushes the pallet 23 to the upper and lower feeding station 2, and the first transfer module returns to standby, and the steps S10 to S50 are repeated.

[0073] Specifically, the control cabinet 1 is provided with a bottom plate 11, and a feeding and discharging station 2 is arranged on the bottom plate 11. The feeding and discharging station 2 comprises a first rail frame 21 arranged on the bottom plate 11, a first guide rail 22 arranged on the first rail frame 21, a supporting plate 23 slidably arranged on the first guide rail 22, a stripping air cylinder 231 arranged on the supporting plate 23, a stripping plate 232 arranged at the output end of the stripping air cylinder 231, an air inlet 233 and an air outlet 234 arranged on the supporting plate 23 and communicated with the stripping air cylinder 231. A first guide block 211 is arranged on one side of the first rail frame 21, and a first damping limiting unit is arranged on the other side. The first damping limiting unit comprises a first positioning air cylinder 271 arranged on the first rail frame 21 and connected with an air pump and a first damping air cylinder 281. The output end of the first positioning air cylinder 271 is provided with a first positioning pin 2711. A positioning seat 235 is arranged on the supporting plate 23 at a position corresponding to the first positioning pin 2711. The first positioning pin 2711 extends into the positioning seat 235 to limit the supporting plate 23. The output end of the first damping air cylinder 281 is provided with a first damping block 2811.

[0074] A first guide groove 212 is arranged on the first guide block 211. A chain hook seat 24 extending into the first guide groove 212 is arranged on the supporting plate 23 at a position corresponding to the first guide groove 212. A first chain unlocking air cylinder 25 communicated with the air pump is arranged on the first guide block 211 at a position corresponding to the chain hook seat 24. The chain hook seat 24 comprises a left hook and a right hook, and a through hole is arranged on each of the two hooks. The output end of the first chain unlocking air cylinder 25 is provided with a first connecting plate 251. A first chain hook shifting fork 252 extending into the first guide groove 212 is arranged on the first connecting plate 251 at a position corresponding to the two through holes. The air pump is connected with the control cabinet 1. An extension section is arranged on one side of the first guide block 211. Two first deceleration position sensors 261 and a first stop position sensor 262 are symmetrically arranged on the extension section with the chain unlocking air cylinder 25 as the center. The first deceleration position sensor 261 and the first stop position sensor 262 are connected with the control cabinet 1.

[0075] The first transfer module comprises a first sliding rail 41 fixedly arranged on the bottom plate 11, a first chain drive motor 44, a third positioning air cylinder 45, a first supporting plate 411 slidably arranged on the first sliding rail 41, and a first drive lead screw 42 connected with the first supporting plate 411. A third guide rail 43 is arranged on the first supporting plate 411. A third guide groove 431 is arranged on one side of the first supporting plate 411. The output end of the first chain drive motor 44 is provided with a first chain 441 extending into the third guide groove 431. The extending end of the first chain 441 is hingedly provided with a first chain hook 442. The output end of the third positioning air cylinder 45 is provided with a third positioning pin 451.

[0076] In the step S20, the following sub-steps are included:

[0077] S201, artificial discharge is completed, the start switch is pressed, the PLC controller in the control cabinet 1 starts the first positioning cylinder 271, the first positioning pin 2711 is separated from the positioning seat 235, the first chain 441 reaches the first deceleration position sensor 261, the first chain drive motor 44 is decelerated, reaches the first stop position sensor 262, the first chain drive motor 44 is decelerated and stopped, at this time, the first chain hook 442 is connected with the corresponding end of the chain hook seat 24;

[0078] S202, the first chain drive motor 44 is started in reverse rotation to wind back the first chain 441, and the first chain 441 pulls the moved discharge tray 23 away from the feeding and discharging station 2;

[0079] S203, when the tray 23 reaches the third deceleration position sensor 461 with the first chain 441, the first chain drive motor 44 is decelerated, and when it reaches the third stop position sensor 462, the first chain drive motor 44 is decelerated and stopped, and during the deceleration and stop process, it still moves a part of the distance, when the first tool positioning sensor 721 detects that the discharged tray 23 is in place, the third positioning cylinder 45 extends the third positioning pin 451 to insert into the positioning seat 235 to realize positioning.

[0080] The first transfer module further comprises a tool number reader 71, and a distance sensor is arranged at the position of the hot pressing mechanism 3, when the distance sensor detects that the hot pressing mechanism 3 does not have a discharged tray 23, a signal is sent to the PLC controller, the PLC controller gives an instruction to the tool number reader 71, and the reading mode of the tool number reader 71 is according to binary coding from low to high, that is, the first transfer mold is sequentially fed to the processing station of the hot pressing mechanism 3 according to the reading order.

[0081] In the step S30, the following sub-steps are included:

[0082] S301, the first drive lead screw 42 drives the first support plate 411 to move to the position of the hot pressing mechanism 3;

[0083] S302, the PLC controller starts the first chain drive motor 44, the first chain 441 pushes the discharged tray 23 to feed the corresponding station of the hot pressing mechanism 3;

[0084] S303, the first chain drive motor 44 is started in reverse rotation to wind back the first chain 441, and the first drive lead screw 42 drives the first support plate 411 to move back to the standby position;

[0085] S304, the PLC controller starts the fourth positioning cylinder 55, the fourth positioning pin 551 is separated from the positioning seat 235, and then the second chain drive motor 54 is started. The second chain 541 is extended and pushes the to-be-discharged tray 23 to move to the feeding and discharging station 2.

[0086] Specifically, the second transfer module includes a second sliding rail 51 fixed on the bottom plate 11, a second chain drive motor 54, a fourth positioning cylinder 55, a second support plate 511 slidingly arranged on the second sliding rail 51, and a second drive lead screw 52 connected to the second support plate 511. A fourth guide rail 53 is arranged on the second support plate 511, and a fourth guide groove 531 is arranged on one side of the second support plate 511. The output end of the second chain drive motor 54 is provided with a second chain 541 extending into the fourth guide groove 531, and the extending end of the second chain 541 is hingedly provided with a second chain hook 542. A drive cylinder 56 is arranged on one side of the second support plate 511, and the output end of the drive cylinder 55 is provided with an inflation block 561 in communication with the air pump. A first air port 5611 in communication with the air inlet 233 and a second air port 5612 in communication with the air outlet 234 are arranged on the inflation block 561. The output end of the fourth positioning cylinder 55 is provided with a fourth positioning pin 551.

[0087] The second transfer module is also provided with a tool number reader 71. After hot pressing is completed, the hot press is raised, and when the distance sensor detects that the hot press is close, a signal is sent to the PLC controller. The PLC controller sends an instruction to the tool number reader 71 in the second transfer module. The reading mode of the tool number reader 71 is according to binary coding and is read from low to high, that is, the second transfer mold sequentially takes materials from the processing stations of the hot press mechanism 3 according to the reading order.

[0088] In the S302 step, the following sub-steps are included:

[0089] S3021, when the first chain 441 reaches the second deceleration position sensor 341, the first chain drive motor 44 is decelerated. When the first chain drive motor 44 reaches the second stop position sensor 342, the first chain drive motor 44 is decelerated and stopped. During the deceleration and stop process, a part of the distance is still moved. At this time, the PLC controller starts the second damping cylinder 361, and the second damping block 3611 is extended to abut against the lower end surface of the discharged tray 23, thereby increasing the friction of the discharged tray 23.

[0090] S3022, when the second tool positioning sensor 722 detects that the discharged tray 23 is in position, the second positioning cylinder 351 extends the second positioning pin 3511 to insert into the positioning seat 235 to achieve positioning.

[0091] S3023, start the second chain unlocking cylinder 33, remove the connection between the first chain 441 and the chain hook seat 24, and the first chain drive motor 44 starts reverse rotation to wind back the first chain 441.

[0092] Meanwhile, in the S304 step, the following sub-steps are included:

[0093] S3041, the PLC controller starts the fourth positioning cylinder 55, the fourth positioning pin 551 is separated from the positioning seat 235 on the to-be-discharged pallet 23, and the PLC controller starts the second chain drive motor 54 again. The second chain 541 pushes the to-be-discharged pallet 23 to move to the feeding and discharging station 2;

[0094] S3042, when the second chain 541 reaches the first deceleration position sensor 261, the second chain drive motor 54 decelerates, and when it reaches the first stop position sensor 262, the second chain drive motor 54 stops decelerating. During the deceleration stop process, it still moves a part of the distance. At this time, the PLC controller starts the first damping cylinder 281, and the first damping block 2811 is extended to abut against the lower end face of the to-be-discharged pallet 23, increasing the friction of the to-be-discharged pallet 23 moving;

[0095] S3043, when the second tool in place sensor 722 at the feeding and discharging station 2 position detects that the to-be-discharged pallet 23 is in place, the first positioning cylinder 271 extends the first positioning pin 2711 to insert into the positioning seat 235 of the to-be-discharged pallet 23 to realize positioning.

[0096] S3044, start the first chain unlocking cylinder 25, remove the connection between the second chain 541 and the chain hook seat 24, and the second chain drive motor 54 starts reverse rotation to wind back the second chain 541.

[0097] Specifically, the hot pressing mechanism 3 comprises a hot press (not marked) arranged on the bottom plate 11, a second rail frame 31 arranged on the bottom plate 11 corresponding to the position of the hot press, a human-computer interaction control panel 30 connected with the control cabinet 1 arranged on the hot press, a second guide groove 312 arranged on a second guide block 311 arranged on one side of the second rail frame 31, a second damping limiting unit arranged on the other side of the second rail frame 31, a second chain unlocking cylinder 33 communicated with the air pump arranged on the second guide block 311, an extension section arranged on one side of the second guide block 311, two second deceleration position sensors 341 and a second stop position sensor 342 symmetrically arranged on the extension section, the second damping limiting unit comprises a second positioning cylinder 351 and a second damping cylinder 361 arranged on the second rail frame 31 and connected with the air pump, the output end of the second positioning cylinder 351 is provided with a second positioning pin 3511, and the output end of the second damping cylinder 361 is provided with a second damping block 3611, the output end of the second chain unlocking cylinder 33 is provided with a second connecting plate 331, and a second chain hook yoke 332 penetrating into the second guide groove 312 is arranged on the second connecting plate 331 corresponding to the positions of the two through holes of the hook seat 24,

[0098] In the S50 step, the following sub-steps are included:

[0099] S501, the first transfer module in the standby position pulls out the loaded tray 23 to the position of the hot pressing mechanism 3 again, which is the same as the steps S20 to S30;

[0100] S502, the PLC controller starts the second positioning cylinder 351, the second positioning pin 3511 is separated from the positioning seat 235, the second chain drive motor 54 is started, when the second chain 541 reaches the second deceleration position sensor 341, the second chain drive motor 54 is decelerated, when the second chain 541 reaches the second stop position sensor 342, the second chain drive motor 54 is decelerated and stopped, at this time, the second chain hook 542 is connected with the corresponding end of the chain hook seat 24 on the tray 23 to be taken;

[0101] S503, the second chain drive motor 54 is started in reverse rotation to wind back the second chain 541, and the second chain 541 pulls the tray 23 to be taken away from the hot pressing mechanism 3;

[0102] S504, when the second chain 541 reaches the fourth deceleration position sensor 571, the second chain drive motor 54 decelerates, and when it reaches the fourth stop position sensor 572, the second chain drive motor 54 stops decelerating, and the deceleration stopping process still moves a part of the distance, when the first workpiece to the position sensor 721 on the second transfer module detects that the to-be-taken material tray 23 is in place, the fourth positioning cylinder 55 extends the fourth positioning pin 551 into the positioning seat 235 of the to-be-taken material tray 23 to realize positioning;

[0103] S505, the second drive lead screw 52 pushes the second support plate 511 back to the standby position, and waits for the material to be taken.

[0104] Specifically, the tray 23 is provided with an air inlet 233 and an air outlet 234 communicated with the stripping cylinder 231, and the output end of the stripping cylinder 231 is provided with a stripping plate 232; the second transfer module further comprises a driving cylinder 56 arranged on the second support plate 511, and the output end of the driving cylinder 56 is provided with an inflation block 561 communicated with the air pump, and the inflation block 561 is provided with a first air port 5611 communicated with the air inlet 233 and a second air port 5612 communicated with the air outlet 234.

[0105] Meanwhile, in the S505 step, the following sub-steps are included:

[0106] S5051, the PLC controller starts the driving cylinder 56, drives the inflation block 561 to move upwards and abuts against the lower end face of the second support plate 511, at this time, the first air port 5611 is communicated with the air inlet 233, and the second air port 5612 is communicated with the air outlet 234, and the PLC controller starts the air pump in succession, the gas is injected into the stripping cylinder 231 through the air inlet 233, the stripping cylinder 231 is pushed upwards under the action of the gas pressure, and the stripping plate 232 is pushed upwards to push out the jig on the tray 23 which moves downwards due to hot pressing processing, so as to take out the processed workpiece by the operator;

[0107] S5052, then, the air pump is started to suck back the gas, and the gas returns to the air pump through the air outlet 234, at the same time, the PLC controller starts the driving cylinder 56 again, drives the inflation block 561 to move downwards, the PLC controller starts the fourth positioning cylinder 55, the fourth positioning pin 551 is separated from the positioning seat 235, and the second chain drive motor 54 is started again, the second chain 541 extends and pushes the to-be-placed material tray 23 to move to the feeding and discharging station 2.

[0108] By Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, the first support plate 411 and the second support plate 511 are both provided with a tool number reader 71 and a first tool position sensor 721, and the bottom plate 11 is provided with a second tool position sensor 722 at positions corresponding to the first rail frame 21 and the three second rail frames 31, and the tool number reader 71 and the tool position sensor are connected with the control cabinet 1.

[0109] The control cabinet 1 is provided with a protective cover 6 with an air outlet, and the control cabinet 1 sends a command to move the two transfer modules between the feeding and discharging station 2 and the three hot pressing mechanisms 3 to realize the automatic feeding and hot pressing and the taking of the material after hot pressing.

[0110] The use principle of the present application is as follows:

[0111] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 12 and Figure 15 , the control cabinet 1 adopts a PLC controller, and a start switch (not marked) is connected and arranged at the feeding and discharging station 2, and a jig (not marked) for placing the workpiece to be processed is arranged on the support plate 23, and the jig is located directly above the four material ejection cylinders 231; before use, the first transfer module is located at the right side of the feeding and discharging station 2 on standby, the third guide rail 43 is in communication with the first guide rail 22, the first guide groove 212 is in communication with the third guide groove 431, and the second transfer module is located at the left side of the feeding and discharging station 2 on standby, the fourth guide rail 53 is in communication with the first guide rail 22, and the fourth guide groove 531 is also in communication with the first guide groove 212; at the same time, the first positioning pin 2711 and the fourth positioning pin 551 respectively extend into the positioning seat 235 of the corresponding support plate 23 to limit the support plate 23.

[0112] In use, as shown in Figure 2 , Figure 3 , Figures 8 to 12As shown, the upper and lower material loading and unloading stations 2 and the second transfer module are each provided with a supporting plate 23. An operator places a workpiece to be processed on the supporting plate 23 of the upper and lower material loading and unloading stations 2. After the workpiece is placed, a start switch is pressed, the first chain drive motor 44 is started, the first chain 441 is released, the first chain hook 442 enters the first guide groove 212 along the third guide groove 431, and is connected to the right hook of the hook seat 24. At this time, the first positioning cylinder 271 is started and retracted to insert the first positioning pin 2711 into the positioning seat 235. Then, the first chain drive motor 44 reverses to pull back the first chain 441, i.e., the first chain hook 442 pulls the supporting plate 23 to move from the first guide rail 22 to the third guide rail 43. During the movement, when the supporting plate 23 reaches the position of the third deceleration sensor 461, a signal is sent to the PLC controller, the PLC controller then sends a command to the first chain drive motor 44 to reduce the speed of the first chain 441. When the supporting plate 23 reaches the position of the third stop sensor 462, the third stop sensor 462 sends a signal to the PLC controller, the PLC controller then sends a command to the first chain drive motor 44 to reduce the speed of the first chain 441. The supporting plate 23 will still move a certain distance. When it reaches the position of the first tool positioning sensor 721, the first tool positioning sensor 721 sends a signal to the PLC controller, the PLC controller then sends a command to the third positioning cylinder 45 to start the third positioning cylinder 45 to extend the third positioning pin 451, which extends into the positioning seat 235 to forcibly stop the movement of the supporting plate 23.

[0113] Subsequently, as Figure 1 、 Figure 2 、 Figures 6 to 14As shown, the PLC controller starts the first drive screw rod 42 to rotate, driving the first support plate 411 to move along the first slide rail 41 to the first hot press position. At this time, the third guide rail 43 is in communication with the second guide rail 32, and the second guide groove 312 is in communication with the third guide groove 431. Then, the PLC controller starts the third positioning cylinder 45 to retract the third positioning pin 451 inserted into the positioning seat 235, and again starts the first chain drive motor 44 to release the first chain 441 to extend from the third guide groove 431 into the second guide groove 312, i.e. the first chain hook 442 is in the right hook position and pushes the support plate 23 along the third guide rail 43 into the second guide rail 32. During the movement, when the support plate 23 reaches the position of the right second deceleration sensor 341, the second deceleration sensor 341 sends a signal to the PLC controller, and the PLC controller sends a command to the first chain drive motor 44 to reduce the extension speed of the first chain 441. When the support plate 23 reaches the position of the right second stop sensor 342, the second stop sensor 342 sends a signal to the PLC controller, and the PLC controller sends a command to the first chain drive motor 44 to stop the first chain 441 at a reduced speed. At the same time, the PLC controller starts the second damping cylinder 361 to extend the second damping block 3611 to abut against the lower end surface of the support plate 23, increasing the friction of the tool movement. When moving to the position of the tool number reader 71, the number of the support plate 23 is read and sent back to the PLC controller for recording as a tool to be processed. When moving to the position of the second tool in-place sensor 722, the second tool in-place sensor 722 sends a signal to the PLC controller, and the PLC controller sends a command to the second positioning cylinder 351 and the second damping cylinder 361 at the same time, i.e. retracting the second damping block 3611 while extending the second positioning pin 3511 of the second positioning cylinder 351, which is inserted into the positioning seat 235 to forcibly stop the movement of the support plate 23 at the first hot press position. Then, the PLC controller starts the second chain unlocking cylinder 33 to extend the second connecting plate 331, and the right second chain hook yoke 332 passes through the through hole of the right hook to push out the first chain hook yoke 252. Then, the first chain drive motor 44 is started to retract the first chain 441 into standby mode. Finally, the first hot press is started for processing.

[0114] During the foregoing operation, when the support plate 23 on the feeding and discharging station 2 moves along the third guide rail 43, Figure 2 、 Figures 6 to 11As shown, the PLC controller starts the fourth positioning cylinder 55 of the second transfer module position, and withdraws the fourth positioning pin 551 from the positioning seat 235 on the corresponding pallet 23, and also starts the second chain drive motor 54, extends the second chain 541, and makes the second chain hook 542 connected with the left hook of the corresponding hook seat 24 on the pallet 23, and continues to make the second chain hook 542 enter the first guide groove 212 along the fourth guide groove 531, that is, drives the corresponding pallet 23 to move from the fourth guide rail 53 to the first guide rail 22, and in the moving process, when the pallet 23 reaches the position of the left first deceleration sensor 261, the first deceleration sensor 261 sends a signal to the PLC controller, and the PLC controller sends an instruction to the second chain drive motor 54 to reduce the extension speed of the second chain 541, and when the pallet 23 reaches the position of the left first stop sensor 262, the first stop sensor 262 sends a signal to the PLC controller, and the PLC controller sends an instruction to the second chain drive motor 54 to stop the second chain 541, and the second chain 541 will also move a certain distance at the same time, and at the same time, the PLC controller starts the first damping cylinder 281 to extend the first damping block 2811 to abut against the lower end face of the pallet 23, and increases the friction of the tool movement, and when moving to the position of the first tool to position sensor 721, the first tool to position sensor 721 sends a signal to the PLC controller, and the PLC controller sends an instruction to the first positioning cylinder 271 and the first damping cylinder 281 at the same time, that is, the first damping block 2811 is moved back at the same time, and the first positioning cylinder 271 is started to extend the first positioning pin 2711, and the first positioning pin 2711 is extended into the positioning seat 235 of the corresponding pallet 223 to forcibly stop the movement of the pallet 23, and then the PLC controller starts the first chain unlocking cylinder 25 to extend the first connecting plate 251, and makes the left first chain hook yoke 252 pass through the through hole of the left hook to eject the second chain hook yoke 332, and then starts the second chain drive motor 54 to withdraw the second chain 541 to standby, and at this time, the operator places the workpiece to be processed on the pallet 23 at the feeding and discharging station 2.

[0115] 、 Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 8 、 Figure 9 、 Figure 13 and Figure 15As shown, the PLC controller is instructed to start the second drive screw 52 to drive the second support plate 511 to move along the second slide rail 51 to the first hot press position, at this time, the fourth guide rail 53 is communicated with the second guide rail 32, the second guide groove 312 is communicated with the fourth guide groove 531, then the PLC controller starts the second positioning cylinder 351 to retract the second positioning pin 3511 inserted into the positioning seat 235, and starts the second chain drive motor 54 to release the second chain 541 from the fourth guide groove 531 to extend into the second guide groove 312, that is, the second chain hook 542 is connected with the left hook of the chain hook seat 24, at this time, the second positioning cylinder 351 is started and the second positioning pin 3511 inserted into the positioning seat 235 is retracted; then the second chain drive motor 54 reversely pulls back the second chain 541, that is, the second chain hook 542 pulls the support plate 23 to move from the second guide rail 32 to the fourth guide rail 53, in the moving process, when the support plate 23 reaches the position of the fourth deceleration sensor 571, the PLC controller is instructed to send a signal to the PLC controller, and the PLC controller sends an instruction to the second chain drive motor 54 to reduce the speed of the second chain 541, when the support plate 23 reaches the position of the fourth stop sensor 572, the fourth stop sensor 572 sends a signal to the PLC controller, and the PLC controller sends an instruction to the second chain drive motor 54, the second chain 541 is decelerated and stopped, and there will be a certain distance to be moved, when the support plate 23 reaches the position of the tool number reader 71, the number of the support plate 23 is read and sent back to the PLC controller to record as having been processed, completing an operation closed loop; when continuing to move to the position of the first tool positioning sensor 721 of the second support plate 411, the first tool positioning sensor 721 sends a signal to the PLC controller, and the PLC controller sends an instruction to the fourth positioning cylinder 55 to start the fourth positioning cylinder 55 to extend the fourth positioning pin 551, and the fourth positioning pin 451 is inserted into the positioning seat 235 to force the support plate 23 to stop moving.

[0116] Then, the PLC controller starts the second drive screw 52 again, and drives the second support plate 511 to move to the left side of the upper and lower material loading station 2. At this time, the fourth guide rail 53 is in communication with the first guide rail 22, and the fourth guide groove 531 is in communication with the first guide groove 212. Then, the PLC controller starts the drive air cylinder 56, and drives the inflation block 561 to move upward and abut against the lower end surface of the second support plate 511. At this time, the first air port 5611 is in communication with the air inlet 233, and the second air port 5612 is in communication with the air outlet 234. The PLC controller then starts the air pump, and air is injected into the stripping air cylinder 231 through the air inlet 233. The stripping air cylinder 231 is pushed upward by the air pressure, and the stripping plate 232 is pushed upward to push out the jig on the support plate 23 that has moved downward due to hot pressing, so that the operator can take out the processed workpiece. Subsequently, the air pump is started to suck back the air, and the air is returned to the air pump through the air outlet 234. At the same time, the PLC controller starts the drive air cylinder 56 again, and drives the inflation block 561 to move downward. The second load moving module is on standby.

[0117] The above steps are repeated, and the feeding of the second and third hot presses is continued, and the material is taken out from the second and third hot presses in a circulating manner. Finally, the workpieces are placed on one station, and the feeding and taking out of the workpieces for multiple hot press stations are realized, which not only saves production cost, but also improves production efficiency.

[0118] Among them, as shown in Figure 2 , since the hot press generates waste gas and mixed gas containing odor during processing, in order to ensure the health of the operator and provide a better production environment, a protective cover 6 with an air outlet is arranged on the bottom plate 11. The protective cover 6 can timely discharge the waste gas and mixed gas containing odor while controlling the airflow. In addition, a stop block 70 (as shown in Figure 2 ) is arranged on the first support plate 411 and the second support plate 511 to prevent the support plate 23 from sliding out.

[0119] It should be noted that the first drive screw 42 and the second drive screw 52 are both screws connected with the output end of a drive motor (not marked), and the two screws are screw-connected with the corresponding support plates. Correspondingly, the lower end of the support plate 23 is provided with a sliding groove matched with the cross-sectional shape of the guide rail, and the lower end of the two support plates is also provided with a sliding groove matched with the cross-sectional shape of the sliding rail (as shown in Figure 3 , Figure 4 and Figure 9 ), which simplifies the structure and ensures smooth movement of the support plate 23 and the support plate. The lower end surface of the support plate 23 is provided with a sensor sensing block 7 (as shown in Figure 9 ) that responds to the recorded sensor, so as to timely send a corresponding signal to the PLC controller during movement, and make the PLC controller issue a corresponding operation instruction. The tool number reader 71 arranged on the two support plates is installed at the same position (as shown inFigures 1 to 4 As shown in the figure, such configuration belongs to the routine setting, which will not be described herein, and the application does not protect the application program of the PLC controller, only to illustrate the use state of the PLC controller.

[0120] In addition, two deceleration position sensors and stop position sensors are symmetrically arranged on the first rail frame 21 and the second rail frame 31, according to the Figure 10 and Figure 13 The positions shown in the figure are mainly to facilitate the loading and unloading operations on the left and right sides of the hot press, especially when the sensor on one side fails, the direction of loading and unloading can be immediately converted to ensure normal production progress, so the hot press is provided with a human-computer interaction control panel 30 connected with the PLC controller (as shown in the figure), and the corresponding action nodes after the reversing are the same as the use principle described above, which will not be described herein. Figure 2

[0121] According to the Figure 9 and Figure 10 As shown in the figure, the chain hook seat 24 is provided with a beveled section at both ends, and the chain hook is also provided with a beveled section to allow the chain hook to move into the chain hook seat 24 to avoid interference, at the same time, the chain hook yoke moves upward and pushes the chain hook upward to make the chain hook disengage from the chain hook seat 24, and pulling the chain realizes the rewinding of the chain.​

Claims

1. A method of automatic cyclic pick-and-place hot pressing, characterized by, The first and second transfer modules, connected to the PLC controller, are used to load the workpiece to the hot press position and remove the hot-pressed workpiece, including the following steps: S10. Position the pallet (23) at the loading / unloading station (2) and place the workpiece on the pallet (23); S20, the first transfer module pulls out the tray (23) with the material already placed to the standby position; S30. The first transfer module pulls the unloaded pallet (23) to the hot pressing mechanism (3) for loading. At the same time, the second transfer module pushes the unloaded pallet (23) to the loading / unloading station (2). S40, the first transfer module returns to the standby position, and the second transfer module moves to the discharge end of the hot pressing mechanism (3) to standby; S50, the first transfer module pulls out the tray (23) that has been loaded with material again to the position of the hot pressing mechanism (3). At the same time, the second transfer module pulls out the tray (23) to be picked up from the hot pressing mechanism (3) and moves back to the standby position. S60, the second transfer module pushes the pallet (23) to be picked up to the loading and unloading station (2), the first transfer module returns to its position to wait for the order, and repeats steps S10 to S50; The loading / unloading station (2) includes a first chain unlocking cylinder (25), a first positioning cylinder (271), a first damping cylinder (281), a first deceleration position sensor (261), a first stop position sensor (262), and a second tooling position sensor (722); the first transfer module includes a first support plate (411), on which a first chain drive motor (44), a third positioning cylinder (45), a third deceleration position sensor (461), and a third stop position sensor (462) are provided. In step S20, the following sub-steps are included: S201. After manual feeding is completed, press the start switch. The PLC controller in the control cabinet (1) starts the first positioning cylinder (271). The first positioning pin (2711) disengages from the positioning seat (235). When the first chain (441) reaches the position of the first deceleration sensor (261), the first chain drive motor (44) decelerates. When it reaches the first stop sensor (262), the first chain drive motor (44) decelerates and stops. At this time, the first chain hook (442) is connected to the corresponding end of the chain hook seat (24). S202, the first chain drive motor (44) starts to rotate in the opposite direction to wind back the first chain (441), and the first chain (441) pulls the pallet (23) that has been unloaded away from the loading and unloading station (2). S203. When the pallet (23) reaches the position of the third deceleration sensor (461) along with the first chain (441), the first chain drive motor (44) decelerates. When it reaches the third stop sensor (462), the first chain drive motor (44) decelerates and stops. During the deceleration and stopping process, it will still move a certain distance. When the first tooling position sensor (721) detects that the pallet (23) that has been unloaded is in place, the third positioning cylinder (45) extends the third positioning pin (451) and inserts it into the positioning seat (235) to achieve positioning.

2. A method of automatic cyclic pick and place hot pressing as claimed in claim 1, wherein, The first transfer module further comprises a tool number reader (71), and a distance sensor is arranged at the position of the hot-pressing mechanism (3). When the distance sensor detects that the hot-pressing mechanism (3) does not have a tray (23) on which materials are placed, a signal is sent to the PLC controller, and the PLC controller gives an instruction to the tool number reader (71). The reading mode of the tool number reader (71) is to read from low to high according to binary coding, that is, the first transfer mold sequentially feeds materials to the processing stations of the hot-pressing mechanism (3) in the reading order.

3. The method of claim 1, wherein the hot bar is moved in a continuous loop. 5 The first transfer module further comprises a first driving lead screw (42) capable of moving the first support plate (411), and the second transfer module comprises a second support plate (511), a second chain driving motor (54), a fourth positioning cylinder (55), a fourth deceleration position sensor (571), a fourth stop position sensor (572) and a second driving lead screw (52) capable of moving the second support plate (511) are arranged on the second support plate (511). In the S30 step, the following sub-steps are included: S301, the first driving lead screw (42) drives the first support plate (411) to move to the position of the hot-pressing mechanism (3); S302, the PLC controller starts the first chain driving motor (44), and the first chain (441) pushes the tray (23) on which materials are placed to the corresponding station of the hot-pressing mechanism (3); S303, the first chain driving motor (44) is started in reverse rotation to wind back the first chain (441), and the first driving lead screw (42) drives the first support plate (411) to move back to the standby position; S304, the PLC controller starts the fourth positioning cylinder (55), the fourth positioning pin (551) is separated from the positioning seat (235), and then the second chain driving motor (54) is started. The second chain (541) is extended and pushes the tray (23) to be placed to move to the feeding and discharging station (2).

4. A method of automatic cyclic pick and place hot pressing as claimed in claim 3 wherein, The hot-pressing mechanism (3) comprises a second chain unlocking cylinder (33), a second positioning cylinder (351), a second damping cylinder (361), a second deceleration position sensor (341), a second stop position sensor (342) and a second tool position sensor (722). In the S302 step, the following sub-steps are included: S3021, when the first chain (441) reaches the second deceleration position sensor (341), the first chain driving motor 44 is decelerated. When the first chain driving motor (44) reaches the second stop position sensor 342, the first chain driving motor (44) is decelerated and stopped. During the deceleration and stop process, a part of the distance is still moved. At this time, the PLC controller starts the second damping cylinder (361), and the second damping block (3611) is extended to abut against the lower end surface of the tray (23) on which materials are placed, so as to increase the friction of the tray (23) on which materials are placed; S3022, when the second tool position sensor (722) detects that the tray (23) on which materials are placed is in position, the second positioning cylinder (351) is extended, the second positioning pin (3511) is inserted into the positioning seat (235), and positioning is realized. S3023, start the second chain unlocking cylinder (33), release the connection between the first chain (441) and the chain hook seat (24), and the first chain drive motor (44) starts reverse rotation to wind back the first chain (441).

5. A method of automatic cyclic pick and place hot pressing as claimed in claim 4, wherein, In the S304 step, the following sub-steps are included: S3041, the PLC controller starts the fourth positioning cylinder (55), the fourth positioning pin (551) is separated from the positioning seat (235) on the to-be-discharged pallet (23), and then the PLC controller starts the second chain drive motor (54). The second chain (541) pushes the to-be-discharged pallet (23) to move to the feeding and discharging station (2); S3042, when the second chain (541) reaches the first deceleration position sensor (261), the second chain drive motor 54 is decelerated, and when the second chain drive motor (54) reaches the first stop position sensor (262), the second chain drive motor (54) is decelerated and stopped. During the deceleration and stop process, a part of the distance is still moved. At this time, the PLC controller starts the first damping cylinder (281), and the first damping block (2811) is extended to abut against the lower end surface of the to-be-discharged pallet (23), so as to increase the friction of the to-be-discharged pallet (23) during movement; S3043, when the second workpiece in place sensor 722 at the feeding and discharging station (2) position detects that the to-be-discharged pallet (23) is in place, the first positioning cylinder (271) extends the first positioning pin (2711) to insert into the positioning seat (235) of the to-be-discharged pallet (23) to realize positioning; S3044, start the first chain unlocking cylinder (25), release the connection between the second chain (541) and the chain hook seat (24), and the second chain drive motor (54) starts reverse rotation to wind back the second chain (541).

6. A method of automatic cyclic feeding of a hot press as claimed in claim 4, characterized in that, In the S50 step, the following sub-steps are included: S501, the first transfer module in standby position pulls out the discharged pallet (23) to the hot pressing mechanism (3) position again, which is the same as the steps S20 to S30; S502, the PLC controller starts the second positioning cylinder (351), the second positioning pin (3511) is separated from the positioning seat (235), the second chain drive motor (54) is started, the second chain (541) reaches the second deceleration position sensor (341), the second chain drive motor (54) is decelerated, and when the second chain drive motor (54) reaches the second stop position sensor (342), the second chain drive motor (54) is decelerated and stopped. At this time, the second chain hook (542) is hung and connected with the corresponding end of the chain hook seat (24) on the to-be-taken pallet (23); S503, the second chain drive motor (54) starts reverse rotation to wind back the second chain (541), and the second chain (541) pulls the to-be-taken pallet (23) away from the hot pressing mechanism (3); S504, when the second chain (541) reaches the fourth deceleration sensor (571), the second chain drive motor (54) decelerates, and when it reaches the fourth stop sensor (572), the second chain drive motor (54) stops decelerating. The deceleration stop process still moves a certain distance. When the first workpiece on the second transfer module reaches the sensor 721, the fourth positioning cylinder (55) extends the fourth positioning pin (551) into the positioning seat (235) of the to-be-taken material tray (23) to achieve positioning. S505, the second drive screw (52) pushes the second support plate (511) back to the standby position, and the material to be taken.

7. A method of automatic cyclic pick and place hot pressing as claimed in claim 6 wherein, The tray (23) is provided with an air inlet (233) and an air outlet (234) communicated with the stripping cylinder (231), and the output end of the stripping cylinder (231) is provided with a stripping plate (232); the second transfer module further comprises a driving cylinder (56) arranged on the second support plate (511), and the output end of the driving cylinder (56) is provided with an inflation block (561) communicated with the air pump, the inflation block (561) is provided with a first air port (5611) communicated with the air inlet (233) and a second air port (5612) communicated with the air outlet (234), and the S505 step comprises the following sub-steps: S5051, the PLC controller starts the driving cylinder (56), drives the inflation block (561) to move upwards and abuts against the lower end surface of the second support plate (511), at this time, the first air port (5611) is communicated with the air inlet (233), and the second air port (5612) is communicated with the air outlet (234), the PLC controller starts the air pump immediately, the gas is injected into the stripping cylinder (231) through the air inlet (233), the stripping cylinder (231) is pushed upwards under the action of the gas pressure, and the stripping plate (232) is pushed upwards to push out the jig on the tray (23) which moves downwards due to hot pressing, so that the operator can take out the processed workpiece; S5052, then, the air pump is started to suck back the gas, the gas returns to the air pump through the air outlet (234), at the same time, the PLC controller starts the driving cylinder (56) again, drives the inflation block (561) to move downwards, the PLC controller starts the fourth positioning cylinder (55), the fourth positioning pin (551) is separated from the positioning seat (235), and the second chain drive motor (54) is started again. The second chain (541) extends and pushes the to-be-placed material tray (23) to move to the feeding and discharging station (2).

8. A method of automatic cyclic feeding of a hot press as claimed in claim 6, characterized in that, The second transfer module is also provided with a workpiece number reader (71), when the hot pressing is completed, the hot press is lifted, and when the distance sensor detects that the hot press is close, a signal is sent to the PLC controller, the PLC controller gives an instruction to the workpiece number reader (71) in the second transfer module, and the reading mode of the workpiece number reader (71) is read from low to high according to binary coding, that is, the second transfer mold takes the material from the processing station of the hot press mechanism (3) in the reading order.

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