Automatic loading and unloading equipment for pad printing machine

Abstract

The present invention belongs to the technical field of conveying equipment, and in particular, relates to an automatic loading and unloading device for a pad printing machine, comprising two front side plates and a rear side plate, a chain transmission assembly is provided between the front side plate and the rear side plate, and a plurality of chain plates are installed on the outer surface of the chain transmission assembly, the chain transmission assembly drives each chain plate to rotate cyclically, a controller is fixedly installed on the side wall of the front side plate, and further comprises: a plurality of supporting platforms, the plurality of supporting platforms are all arranged between the front side plate and the rear side plate, and the end surface of each of the chain plates is provided with an adjustment hole. The present invention can automatically load and unload materials for a pad printing machine, has high product conveying efficiency, and is conducive to reducing the cost of the device, and can automatically adjust the product position to ensure the accuracy of the pad printing position and reduce the influence of device wear, etc. At the same time, it can automatically remind personnel to inspect and maintain the device based on the offset of the product moving position, and can assist in the rapid solidification of the ink pattern of the printed product.

Description

Technical Field

[0001] The invention belongs to the technical field of conveying equipment, and in particular relates to automatic loading and unloading equipment for a pad printing machine. Background Art

[0002] A pad printer is a printing device that transfers the ink on the gravure plate to the surface of the substrate through a rubber head. It is suitable for a variety of materials, has high printing precision and clear patterns. In order to adapt to automated production, conveying equipment is usually required to work with the pad printer to achieve automatic loading and unloading of the pad printer.

[0003] At present, the equipment used for loading and unloading of pad printers is usually composed of a belt conveyor and a loading and unloading manipulator. The belt conveyor is used to transport the products to be printed, and the loading and unloading manipulator places the products to be printed under the rubber head and transfers the printed products out to realize automatic loading and unloading, such as an automatic loading and unloading device for pad printers disclosed in patent announcement number CN213567971U;

[0004] For small printed products such as bottle caps, their cylindrical shape, small size and soft material bring challenges to the robot's clamping and loading and unloading. When designing the clamping structure, it is necessary to achieve precise clamping and accurately control the force. The design requirements are quite high, and the cost of robot application is relatively high. In addition, the method of using a belt conveyor to feed the material first and then transferring it by the robot for loading and unloading has too many process links, which greatly reduces the efficiency of loading and unloading, and thus has an adverse effect on the overall work efficiency of the pad printer. At the same time, due to wear, moving inertia and other reasons, the belt conveyor may cause a slight shift in the position of the product when feeding, thereby affecting the normal loading and unloading work. Summary of the invention

[0005] The object of the present invention is to provide an automatic loading and unloading device for a pad printing machine in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: an automatic loading and unloading device for a pad printing machine, comprising two front side plates and a rear side plate, a chain transmission assembly is arranged between the front side plates and the rear side plates, and a plurality of chain plates are installed on the outer surface of the chain transmission assembly, the chain transmission assembly drives each chain plate to rotate cyclically, a controller is fixedly installed on the side wall of the front side plate, and further comprises:

[0007] A plurality of supporting platforms are arranged between the front side plate and the rear side plate, an adjustment hole is opened on the end surface of each chain plate, and each supporting platform is slidably arranged in each adjustment hole, each chain plate is installed with a supporting component for supporting the supporting platform, and the rear side plate is installed with an offset adjustment mechanism, and the offset adjustment mechanism is used to adjust the position of the supporting platform;

[0008] Multiple mounting mold columns are mounted on the end faces of each supporting platform;

[0009] The feeding unit is installed between the front side plate and the rear side plate and is used to install the product on each mounting mold column;

[0010] A plurality of fixing units are arranged inside each mounting mold column for fixing the product;

[0011] An air supply unit, disposed between the front side plate and the rear side plate, for supplying air to the interior of the fixed unit;

[0012] Multiple early warning units are installed inside the corresponding supporting platforms.

[0013] Preferably, each of the supporting assemblies includes a plurality of circular grooves provided on the two side walls of the supporting platform, and an insulating ring is fixedly connected to the notch of each circular groove, an insulating support rod is slidably connected to the inner wall of each insulating ring, and a support spring is fixedly provided between the insulating support rod and the insulating ring, and one end of each insulating support rod is fixedly connected to the hole wall of the adjusting hole.

[0014] Preferably, the offset adjustment mechanism includes a transverse pushing electric push rod fixedly plugged into the side wall of the rear side plate, and a transverse pushing plate is fixedly installed on the telescopic end of the transverse pushing electric push rod, and fixed plates are fixedly installed on both ends of the side wall of the transverse pushing plate, and the two fixed plates are respectively arranged on both sides of the same side support platform, and the side walls of the two fixed plates on the opposite sides are fixedly connected with electromagnetic blocks, and two permanent magnets corresponding to the positions of the electromagnetic blocks are fixedly plugged into the upper end of the side wall of the support platform, and the transverse pushing electric push rod and the two electromagnetic blocks are electrically connected to the controller.

[0015] Preferably, the feeding unit includes a support plate fixedly arranged between the front side plate and the rear side plate, a storage tube is fixedly inserted on the end face of the support plate, a proximity switch is fixedly inserted on the end face of the support plate at a position on one side of the storage tube, the lower end of the support plate is rotatably connected to a blanking tray, and a blanking hole is opened on the end face of the blanking tray, the blanking hole is arranged below the storage tube, a gear drive assembly is installed on the end face of the support plate, the controller controls the operation of the gear drive assembly according to the electrical signal output by the proximity switch, and the product in the storage tube falls onto the mold column installed on the same side through the blanking hole.

[0016] Preferably, each of the fixing units includes a cavity opened inside the mounting mold column, and a plurality of push grooves are opened on the side walls of the cavity, a push rod is slidably connected to the bottom of each of the push grooves, and an arc-shaped push strip is fixedly connected to the rod end of each of the push rods, a rubber strip is fixedly bonded to the side wall of each of the arc-shaped push strips away from the push rod on the same side, a piston is slidably connected to the inside of each of the push grooves, and each piston is fixedly connected to the push rod on the same side, a return spring is fixedly provided between each of the pistons and the push groove on the same side, an air intake pipe is fixedly inserted into the lower cavity wall of the cavity, and the air intake pipe extends to the bottom of the support platform.

[0017] Preferably, the air supply unit includes a connecting plate fixedly installed between the front side plate and the rear side plate, and the connecting plate is arranged on the inner side of the chain transmission assembly, two pushing electric push rods are fixedly inserted on the end face of the connecting plate, and the telescopic ends of the two pushing electric push rods are fixedly connected to the same hollow block, the top of the hollow block is fixedly connected to a docking pipe, and the docking pipe is coaxial with the air inlet pipe, an air pressure detector is fixedly installed on the end face of the hollow block, and the pressure measuring end of the air pressure detector is arranged inside the hollow block, an air pump is fixedly installed on the side wall of the front side plate, the output end of the air pump is fixedly connected to an air supply pipe sealed at both ends, and an air outlet pipe is fixedly inserted on the pipe wall of the air supply pipe, a connecting hose is installed on the pipe end of the outlet pipe, and the connecting hose is connected to the interior of the hollow block, and the air supply pipe is installed with a diversion drying mechanism.

[0018] Preferably, each of the early warning units includes a conductive sleeve mounted on the outside of an insulating support rod, and the conductive sleeve is fixedly connected to the side wall of the insulating circular ring on the same side; the rod wall of the insulating support rod is fixedly mounted with a conductive ring, and the outer diameter of the conductive ring is the same as the inner diameter of the conductive sleeve; a socket is fixedly installed on the bottom of the support platform, a plug matching the socket is fixedly installed on the top of the hollow block, an electromagnetic switch is installed on the side wall of the hollow block, the conductive ring and the conductive sleeve on the same side are electrically connected to the electromagnetic switch through the socket and the plug, and the electromagnetic switch is electrically connected to the controller.

[0019] Preferably, the diversion drying mechanism includes a plurality of diversion tubes fixedly plugged into the upper tube wall of the air supply pipe, and a mounting block is fixedly installed inside each diversion tube, and an electric heating rod is fixedly plugged into the end face of each mounting block, a normally open solenoid valve is installed inside the air supply pipe at a position between the diversion tube and the air outlet pipe, and a normally closed solenoid valve is installed inside the air outlet pipe, the normally open solenoid valve, the normally closed solenoid valve and the electric heating rod are all electrically connected to the controller, and the air outlet end of each diversion tube passes through the side wall of the front side panel and is located above the chain drive assembly.

[0020] Compared with the existing technology, the advantages of an automatic loading and unloading device for a pad printing machine are:

[0021] 1. Through the cooperation of the front side plate, rear side plate, chain transmission assembly, chain plate, controller, support platform, mounting mold column and feeding unit, the loading and unloading of products can be integrated, and there is no need for transportation such as manipulators in the middle to load and unload the products, which is beneficial to improve the conveying efficiency of the products, thereby assisting in improving the printing efficiency of the pad printer and helping to reduce equipment costs.

[0022] 2. Through the coordination of the adjustment holes, support components, and offset adjustment mechanisms, the position of the product can be automatically and accurately adjusted before pad printing to ensure the position accuracy of the product, thereby helping to improve the accuracy of pad printing and reduce the possibility of position deviation of the product due to wear, movement inertia, etc., which is conducive to ensuring the quality of pad printing.

[0023] 3. Through the cooperation of the fixing unit and the air supply unit, the bottle cap and other products can be quickly fixed, and the slight deviation of the product position caused by the free gap can be reduced, further improving the position accuracy of the product during pad printing. The air supply unit cooperates with the diversion drying mechanism to assist in the rapid drying of the ink on the surface of the product after pad printing.

[0024] 4. By setting up the early warning unit, it can automatically remind personnel when the deviation of the product position is too large, so as to ensure that personnel can inspect and maintain the device in time, which is conducive to the long-term and stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an automatic loading and unloading device for a pad printing machine provided by the present invention;

[0026] Figure 2 It is a schematic diagram of the connection structure of a chain transmission assembly and a chain plate of an automatic loading and unloading device of a pad printing machine provided by the present invention;

[0027] Figure 3 The invention provides a pad printing machine automatic loading and unloading device Figure 1 A magnified view of the structure of part A;

[0028] Figure 4 It is a schematic diagram of the internal structure of a chain plate of an automatic loading and unloading device of a pad printing machine provided by the present invention;

[0029] Figure 5 It is a structural schematic diagram of a feeding unit of an automatic loading and unloading device of a pad printing machine provided by the present invention;

[0030] Figure 6 It is a schematic diagram of the top view of the structure of a blanking tray of an automatic loading and unloading device of a pad printing machine provided by the present invention;

[0031] Figure 7The invention provides a pad printing machine automatic loading and unloading device Figure 4 A magnified view of the structure of part B;

[0032] Figure 8 The present invention is a schematic diagram of a partial top view of the structure of an air supply unit of an automatic loading and unloading device of a pad printer provided by the present invention.

[0033] In the figure: 1 front side plate, 2 rear side plate, 3 chain transmission assembly, 4 chain plate, 5 controller, 6 support platform, 7 adjustment hole, 8 support assembly, 81 round groove, 82 insulating ring, 83 insulating support rod, 84 support spring, 9 offset adjustment mechanism, 91 horizontal push electric push rod, 92 horizontal push plate, 93 fixed plate, 94 electromagnetic block, 95 permanent magnet, 10 installation mold column, 11 feeding unit, 111 support plate, 112 storage tube, 113 proximity switch, 114 blanking tray, 115 blanking hole, 116 gear drive assembly, 12 fixed unit, 121 cavity, 122 push groove, 123 push rod, 124 arc-shaped push strip, 125 rubber strip, 126 piston, 127 return spring, 128 air inlet pipe, 13 air supply unit, 131 connecting plate, 132 push electric push rod, 133 hollow block, 134 docking tube, 135 air pressure detector, 136 air pump, 137 air supply pipe, 138 air outlet pipe, 139 connecting hose, 14 early warning unit, 141 conductive sleeve, 142 conductive ring, 143 socket, 144 plug, 145 electromagnetic switch, 15 shunt drying mechanism, 151 shunt pipe, 152 mounting block, 153 electric heating rod, 154 normally open electromagnetic valve, 155 normally closed electromagnetic valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figure 1-Figure 8As shown, an automatic loading and unloading device for a pad printing machine includes two front side plates 1 and a rear side plate 2, a chain transmission component 3 is arranged between the front side plate 1 and the rear side plate 2, and a plurality of chain plates 4 are installed on the outer surface of the chain transmission component 3, the chain transmission component 3 drives each chain plate 4 to rotate cyclically, a controller 5 is fixedly installed on the side wall of the front side plate 1, and also includes: a plurality of supporting platforms 6, the plurality of supporting platforms 6 are arranged between the front side plate 1 and the rear side plate 2, the end surface of each chain plate 4 is opened with an adjustment hole 7, and each supporting platform 6 slides Arranged in each adjustment hole 7, each chain plate 4 is installed with a support assembly 8 for supporting the support platform 6, each support assembly 8 includes a plurality of circular grooves 81 opened on the two side walls of the support platform 6, and each circular groove 81 is fixedly connected with an insulating ring 82 at the notch, and the inner wall of each insulating ring 82 is slidably connected with an insulating support rod 83, and a support spring 84 is fixedly provided between the insulating support rod 83 and the insulating ring 82, and one end of each insulating support rod 83 is fixedly connected to the hole wall of the adjustment hole 7.

[0036] The rear side plate 2 is installed with an offset adjustment mechanism 9, and the offset adjustment mechanism 9 is used to adjust the position of the support platform 6. The offset adjustment mechanism 9 includes a horizontal push electric push rod 91 fixedly inserted in the side wall of the rear side plate 2, and the telescopic end of the horizontal push electric push rod 91 is fixedly installed with a horizontal push plate 92, and both ends of the side wall of the horizontal push plate 92 are fixedly installed with fixed plates 93, and the two fixed plates 93 are respectively arranged on both sides of the support platform 6 on the same side, and the side walls of the two fixed plates 93 on the opposite side are fixedly connected with electromagnetic blocks 94, and the upper end of the side wall of the support platform 6 is fixedly inserted with two permanent magnets 95 corresponding to the position of the electromagnetic blocks 94, the horizontal push electric push rod 91 and the two electromagnetic blocks 94 are electrically connected to the controller 5, and the support platform 6, the mounting mold column 10, the fixed plate 93 and other components are composed of a non-magnetic structure to avoid affecting the position control of the support platform 6.

[0037] A plurality of mounting mold columns 10 are mounted on the end faces of the respective support platforms 6, and a feeding unit 11 is mounted between the front side plate 1 and the rear side plate 2, and is used to mount the product on each mounting mold column 10. The feeding unit 11 comprises a supporting plate 111 fixedly arranged between the front side plate 1 and the rear side plate 2, a material storage tube 112 is fixedly plugged into the end face of the supporting plate 111, a proximity switch 113 is fixedly plugged into the position of the end face of the supporting plate 111 located on one side of the material storage tube 112, and a material drop tray 114 is rotatably connected to the lower end of the supporting plate 111, and the material drop tray The end surface of 114 is provided with a drop hole 115, and the drop hole 115 is arranged below the storage tube 112. The end surface of the support plate 111 is installed with a gear drive assembly 116. The controller 5 controls the gear drive assembly 116 to work according to the electrical signal output by the proximity switch 113. The product in the storage tube 112 falls onto the mold column 10 installed on the same side through the drop hole 115. The proximity switch 113 can detect whether the passing support platform 6 has reached the set position, and automatically outputs an electrical signal to the controller 5 after the support platform 6 reaches the set position.

[0038] A plurality of fixing units 12 are arranged inside each mounting mold column 10 for fixing the product. Each fixing unit 12 includes a cavity 121 opened inside the mounting mold column 10, and a plurality of push grooves 122 are opened on the side wall of the cavity 121. A push rod 123 is slidably connected to the bottom of each push groove 122, and an arc-shaped push strip 124 is fixedly connected to the rod end of each push rod 123. The side wall of each arc-shaped push strip 124 away from the push rod 123 on the same side is fixedly bonded with a push rod 123. A rubber strip 125 and a piston 126 are slidably connected to the interior of each push groove 122, and each piston 126 is fixedly connected to the push rod 123 on the same side. A return spring 127 is fixedly provided between each piston 126 and the push groove 122 on the same side. An air inlet pipe 128 is fixedly inserted into the lower cavity wall of the cavity 121, and the air inlet pipe 128 extends to the bottom of the supporting platform 6. The rubber strip 125 can increase the friction between the arc-shaped push strip 124 and the inner wall of the bottle cap and prevent the inner wall of the bottle cap from being worn.

[0039] The air supply unit 13 is arranged between the front side plate 1 and the rear side plate 2, and is used to supply air to the interior of the fixed unit 12. The air supply unit 13 includes a connecting plate 131 fixedly installed between the front side plate 1 and the rear side plate 2, and the connecting plate 131 is arranged on the inner side of the chain transmission component 3, and the end surface of the connecting plate 131 is fixedly plugged with two push-up electric push rods 132, and the telescopic ends of the two push-up electric push rods 132 are fixedly connected to the same hollow block 133, and the top of the hollow block 133 is fixedly connected to a butt pipe 134, and the butt pipe 134 is coaxial with the air inlet pipe 128, and the end surface of the hollow block 133 is fixedly installed with an air pressure detector 135, and the air The pressure measuring end of the pressure detector 135 is arranged inside the hollow block 133, and an air pump 136 is fixedly installed on the side wall of the front side plate 1, and the output end of the air pump 136 is fixedly connected to an air supply pipe 137 with sealed ends, and an air outlet pipe 138 is fixedly inserted into the pipe wall of the air supply pipe 137, and a connecting hose 139 is installed at the pipe end of the air outlet pipe 138, and the connecting hose 139 is connected to the interior of the hollow block 133, and a diversion drying mechanism 15 is installed on the air supply pipe 137. The air pressure detector 135 can detect the internal air pressure of the hollow block 133, and automatically output an electrical signal to the controller 5 after the air pressure reaches the set value. This is an existing mature technology, so it will not be elaborated here.

[0040] The shunt drying mechanism 15 includes a plurality of shunt pipes 151 fixedly plugged into the upper tube wall of the air supply pipe 137, and a mounting block 152 is fixedly installed inside each shunt pipe 151, and an electric heating rod 153 is fixedly plugged into the end face of each mounting block 152. A normally open solenoid valve 154 is installed at a position between the shunt pipe 151 and the air outlet pipe 138 inside the air supply pipe 137, and a normally closed solenoid valve 155 is installed inside the air outlet pipe 138. The normally open solenoid valve 154, the normally closed solenoid valve 155 and the electric heating rod 153 are all electrically connected to the controller 5. The air outlet end of each shunt pipe 151 passes through the side wall of the front side plate 1 and is located above the chain transmission assembly 3. An air suction pipeline can be arranged at the air inlet end of the air pump 136, and a filter and other components can be set at the air suction end. By negative pressure suction, the volatile waste gas generated during printing around the pad printer and the flying gas generated during drying can be sucked away and purified.

[0041] Multiple early warning units 14 are installed inside the corresponding support platform 6, and each early warning unit 14 includes a conductive sleeve 141 sleeved on the outside of the insulating support rod 83, and the conductive sleeve 141 is fixedly connected to the side wall of the insulating ring 82 on the same side. The rod wall of the insulating support rod 83 is fixedly sleeved with a conductive ring 142, and the outer diameter of the conductive ring 142 is the same as the inner diameter of the conductive sleeve 141. A socket 143 is fixedly installed at the bottom of the support platform 6, and a plug 144 matching the socket 143 is fixedly installed on the top of the hollow block 133. An electromagnetic switch 145 is installed on the side wall of the hollow block 133. The conductive ring 142 and the conductive sleeve 141 on the same side are electrically connected to the electromagnetic switch 145 through the socket 143 and the plug 144, and the electromagnetic switch 145 is electrically connected to the controller 5. After the electromagnetic switch 145 is connected to the power supply circuit of the controller 5 through the conductive ring 142 and the conductive sleeve 141, the moving contact of the electromagnetic switch 145 will automatically close and output an electrical signal to the controller 5.

[0042] The operating principle of the present invention is now described as follows: the bottle cap product to be printed is placed in the storage tube 112, and then the controller 5 is started. The controller 5 controls the chain transmission component 3 to work, and the chain transmission component 3 can drive each chain plate 4 to move in a circular motion. When the proximity switch 113 detects that the supporting platform 6 reaches the bottom of the storage tube 112, the proximity switch 113 will output an electrical signal to the controller 5. At this time, the controller 5 will control the chain transmission component 3 to stop working, and the controller 5 will immediately control the gear drive component 116 to work once at a fixed time. The gear drive component 116 can drive the blanking plate 114 to rotate 360°, so that the blanking hole 115 can pass directly under the storage tube 112 once. When the blanking hole 115 passes under the storage tube 112, the bottle cap product stored at the bottom of the storage tube 112 will fall to the mounting mold column 10 of the supporting platform 6 under the action of gravity. On, when the bottle cap passes through the drop hole 115, the drop plate 114 has already turned the drop hole 115 away, so the remaining bottle caps are still stored in the storage tube 112 until the proximity switch 113 detects that the next support platform 6 moves to the set position (wherein, when printing a large number of bottle caps, a vibration plate is used to replenish the storage tube 112. The vibration plate makes the bottle caps enter the storage tube 112 in a posture by means of vibration screening, that is, the opening of the bottle cap faces downward. In order to prevent the bottle caps from falling randomly after the storage tube 112 is full of bottle caps, a guide cover is set on the side wall of the storage tube 112. After the bottle caps replenished by the vibration plate to the storage tube 112 are full, the excess bottle caps will fall into the guide cover and fall back into the storage area of ​​the vibration plate. In addition, since the inner diameter of the storage tube 112 is slightly larger than the diameter of the bottle caps, the bottle caps are prevented from being blocked in the storage tube 112);

[0043] After the controller 5 receives the electrical signal of the proximity switch 113, after a certain period of time (the time is generally set based on the time required for a single printing of the pad printer), the controller 5 will control the chain transmission component 3 to resume work, so that the chain plate 4 continues to move, and when the proximity switch 113 detects that the next support platform 6 has reached the position, it continues to replenish the material to the installation mold column 10. In the initial stage, in order to prevent the pad printer from printing on the installation mold column 10 that has not yet installed the bottle cap, the material can be replenished manually to each installation mold column 10 between the pad printer and the material storage tube 112 at the beginning of printing. Under the condition that each bottle cap product to be printed passes under the rubber head of the pad printer in turn (the rubber head of the pad printer is directly above the hollow block 133), and after the controller 5 controls the chain transmission component 3 to stop working (that is, after the controller 5 receives the electrical signal output by the proximity switch 113), at this time, a chain plate 4 is under the rubber head of the pad printer, and the controller 5 synchronously controls the horizontal push electric push rod 91 to perform a timed extension operation, so that the horizontal push plate 92 can drive the two fixed plates 93 to move toward the direction of the support platform 6. After the timed work of the horizontal push electric push rod 91 is completed, the two electromagnetic blocks 94 are located on both sides of the support platform 6, and then the controller 5 The two electromagnetic blocks 94 are controlled to be powered on and work, and the two electromagnetic blocks 94 are powered on to generate magnetic force. Under the effect of like-charge repulsion, the two electromagnetic blocks 94 will generate magnetic thrust on the permanent magnet 95 on the same side, so that the same thrust can be applied to the support platform 6 from both sides. If the chain plate 4 does not move to the position directly below the rubber head of the pad printer due to wear, looseness, moving inertia, etc. of the chain transmission component 3, the support platform 6 is not in the center position between the two electromagnetic blocks 94. At this time, the distance between the support platform 6 and one of the electromagnetic blocks 94 becomes smaller, and the distance between the support platform 6 and the other electromagnetic block 94 becomes larger. Due to the electromagnetic force generated by the two electromagnetic blocks 94, the support platform 6 is not in the center position between the two electromagnetic blocks 94. The forces are the same, so the magnetic thrust exerted by the electromagnetic block 94 on the side closer to the support platform 6 to the permanent magnet 95 on the same side becomes larger, so that the support platform 6 moves toward the electromagnetic block 94 farther away, and when the support platform 6 moves back to the center position between the two electromagnetic blocks 94, the two electromagnetic blocks 94 exert the same thrust on the support platform 6 through the permanent magnet 95, and the directions are opposite, so the thrusts are offset, so that the support platform 6 is stabilized at the center position between the two electromagnetic blocks 94, and then the position of the support platform 6 can be adjusted to ensure the accuracy of the position of the support platform 6, so that the position of the bottle cap product on the mold column 10 and the rubber head of the pad printing machine can be kept accurate;

[0044] Among them, if the chain transmission component 3 of the controller 5 is worn or loosened to a large extent, the moving position of the chain plate 4 deviates greatly from the set position. At this time, the electromagnetic block 94 pushes the support platform 6 to move too far, and when the support platform 6 moves under the action of the electromagnetic block 94, the support platform 6 drives the insulating ring 82 and the insulating support rod 83 to produce a relative displacement. If the moving distance of the support platform 6 is large, the relative displacement between the insulating ring 82 and the insulating support rod 83 is large. Therefore, at this time, the conductive ring 142 on the insulating support rod 83 on the opposite side of the return direction of the support platform 6 will contact the conductive sleeve 141 on the same side (that is, in the initial state, the support platform 6 is closer to the electromagnetic block 94);

[0045] After the controller 5 controls the electromagnetic block 94 to be energized for 3 seconds, the controller 5 will control the two push electric push rods 132 to extend at a fixed time. The two push electric push rods 132 can push the hollow block 133 upward, so that the butt joint pipe 134 on the hollow block 133 abuts against the air inlet pipe 128, and the plug 144 is inserted into the socket 143. If the conductive sleeve 141 contacts the conductive ring 142, the connection circuit between the conductive sleeve 141, the conductive ring 142 and the electromagnetic switch 145 is connected, so that the electromagnetic part inside the electromagnetic switch 145 generates magnetic attraction, which will attract its own moving contact, so The electromagnetic switch 145 will output a closed electrical signal to the controller 5. At this time, the controller 5 will send out an early warning voice through its own voice module. After receiving the early warning voice, the personnel should promptly inspect and maintain the chain transmission component 3 to ensure the accurate transmission of the chain transmission component 3 (wherein, after receiving the closed electrical signal of the electromagnetic switch 145, the controller 5 will suspend the loading and unloading work, and output a stop electrical signal to the control end of the pad printer, so that the pad printer also suspends work, to avoid the chain transmission component 3 from being damaged due to the continued pad printing work when the working error of the chain transmission component 3 is large);

[0046] Secondly, when the controller 5 does not receive the closing electrical signal of the electromagnetic switch 145, when the controller 5 controls the push electric push rod 132 to complete the work, the controller 5 will control the air pump 136, the normally open electromagnetic valve 154 and the normally closed electromagnetic valve 155 to energize and work, the normally open electromagnetic valve 154 is energized to close, and the normally closed electromagnetic valve 155 is energized to open. At this time, the air flow delivered to the inside of the air supply pipe 137 by the air pump 136 will enter the inside of the hollow block 133 through the air outlet pipe 138 and the connecting hose 139, and because the butt pipe 134 is abutted against the air inlet pipe 128 Therefore, the airflow will enter the cavity 121 through the butt joint 134 and the air inlet 128, and the air pressure inside the cavity 121 will increase rapidly, so that the piston 126 inside each push groove 122 moves outward, so that each push rod 123 can drive each arc push strip 124 and rubber strip 125 to move outward and abut against the inner wall of the bottle cap, so that the bottle cap can be fixed (because the push force applied by each push rod 123 is the same, the fixed bottle cap can be coaxial with the mounting mold column 10, further ensuring the position accuracy of the bottle cap, To reduce the influence of the free gap on the position accuracy of the bottle cap, as the air pressure inside the cavity 121 and the hollow block 133 gradually increases, the air pressure detector 135 will detect that the air pressure has reached a set value (the set value can be set based on the material and strength of the bottle cap to avoid defects such as deformation of the bottle cap caused by the push force), and the air pressure detector 135 will output an electrical signal to the controller 5, and the controller 5 will immediately control the normally open solenoid valve 154 and the normally closed solenoid valve 155 to cut off the power, so as to avoid excessive air pressure inside the cavity 121, which will cause each push rod 123 and The pushing pressure exerted by the arc-shaped pushing strip 124 on the inner wall of the bottle cap is too large. At this time, the airflow delivered by the air pump 136 will be discharged through each shunt pipe 151, and the controller 5 will control each electric heating rod 153 to start working after being started. Each electric heating rod 153 can heat the airflow inside each shunt pipe 151 (the heating temperature is 45°C), so that the hot airflow discharged from each shunt pipe 151 can dry the bottle caps passing through each mounting mold column 10, so that the ink pattern on the top of the bottle cap after printing is quickly solidified;

[0047] After the controller 5 controls the normally open solenoid valve 154 and the normally closed solenoid valve 155 to be powered on and off, the controller 5 will output a printing electrical signal to the control end of the pad printer. At this time, the pad printer can perform a printing action, so that the ink pattern can be printed on the bottle cap. After the pad printer performs a pad printing action, its control end will feedback an electrical signal to the controller 5. At this time, the controller 5 will control each push electric push rod 132 to perform a timed return work, so that the hollow block 133 drives the plug 144 and the docking tube 134 to move downward, and the excess air inside the cavity 121 will be released through the air inlet pipe 128, and each rubber strip 125 will be separated from the inner wall of the bottle cap to avoid affecting the subsequent unloading work. At the same time, the controller 5 controls the two electromagnetic blocks 94 The power is turned off, and the horizontal push electric push rod 91 is controlled to perform a timed return work. After the timed return work of the horizontal push electric push rod 91 is completed, the controller 5 controls the chain transmission component 3 to continue working, so that the next installation mold column 10 moves to the bottom of the pad printing machine rubber head, and then the pad printing work of the next bottle cap is continued. The bottle cap after pad printing moves intermittently to the discharge end along with the chain plate 4. Under the action of the hot air flow, the ink pattern on its surface can be quickly solidified. When the bottle cap moves to the tail of the chain transmission component 3, each chain plate 4 gradually flips from the top to the bottom of the chain transmission component 3. At this time, under the action of gravity, the bottle cap is separated from the installation mold column 10. A storage container is placed under the tail of the chain transmission component 3 to hold the printed bottle cap;

[0048] Since the looseness and wear of the chain transmission component 3 may also cause the material storage tube 112 and the corresponding installation mold column 10 to be offset, in order to ensure the accuracy of the material storage tube 112 in feeding the installation mold column 10, a set of horizontal pushing electric push rods 91, horizontal pushing plates 92, fixed plates 93, and electromagnetic blocks 94 may also be installed at the material storage tube 112. After the controller 5 receives the electrical signal from the proximity switch 113, the controller 5 will also control the horizontal pushing electric push rods 91 and the electromagnetic blocks 94 at the material storage tube 112 to work, thereby also regulating the position of the installation mold column 10 under the material storage tube 112 to ensure that the installation mold column 10 remains aligned with the material storage tube 112, so that the bottle cap can normally pass through the drop hole 115 and fall on the installation mold column 10 at this position.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic loading and unloading device for a pad printing machine, comprising two front side plates (1) and a rear side plate (2), a chain transmission assembly (3) is arranged between the front side plates (1) and the rear side plates (2), and a plurality of chain plates (4) are installed on the outer surface of the chain transmission assembly (3), the chain transmission assembly (3) drives each chain plate (4) to rotate cyclically, and a controller (5) is fixedly installed on the side wall of the front side plate (1), characterized in that: Also includes: A plurality of support platforms (6) are arranged between the front side plate (1) and the rear side plate (2); an adjustment hole (7) is opened on the end surface of each chain plate (4), and each support platform (6) is slidably arranged in each adjustment hole (7); each chain plate (4) is installed with a support component (8) for supporting the support platform (6); the rear side plate (2) is installed with an offset adjustment mechanism (9), and the offset adjustment mechanism (9) is used to adjust the position of the support platform (6); A plurality of mounting mold columns (10) are mounted on the end surface of each supporting platform (6); A feeding unit (11) is installed between the front side plate (1) and the rear side plate (2) and is used to install the product on each mounting mold column (10); A plurality of fixing units (12), each of which is arranged inside each mounting mold column (10) and is used to fix the product; An air supply unit (13) is arranged between the front side plate (1) and the rear side plate (2) and is used to supply air to the interior of the fixing unit (12); A plurality of early warning units (14) are installed inside corresponding support platforms (6); Each of the fixing units (12) comprises a cavity (121) formed inside the mounting mold column (10), and a plurality of push grooves (122) are formed on the side wall of the cavity (121), a push rod (123) is slidably connected to the bottom of each of the push grooves (122), and an arc-shaped push strip (124) is fixedly connected to the rod end of each of the push rods (123), and a side wall of each of the arc-shaped push strips (124) away from the push rod (123) on the same side is fixedly connected to the bottom of each of the push grooves (122). A rubber strip (125) is fixedly bonded thereto, a piston (126) is slidably connected to the interior of each of the push grooves (122), and each of the pistons (126) is fixedly connected to the push rod (123) on the same side, a return spring (127) is fixedly provided between each of the pistons (126) and the push groove (122) on the same side, and an air intake pipe (128) is fixedly plugged into the lower cavity wall of the cavity (121), and the air intake pipe (128) extends to the bottom of the support platform (6); The air supply unit (13) comprises a connecting plate (131) fixedly mounted between a front side plate (1) and a rear side plate (2), and the connecting plate (131) is arranged on the inner side of the chain transmission assembly (3), two push-pushing electric push rods (132) are fixedly plugged into the end surface of the connecting plate (131), and the telescopic ends of the two push-pushing electric push rods (132) are fixedly connected to the same hollow block (133), the top of the hollow block (133) is fixedly connected to a butt pipe (134), and the butt pipe (134) is coaxial with the air intake pipe (128), and the end surface of the hollow block (133) is fixedly mounted An air pressure detector (135) is installed, and the pressure measuring end of the air pressure detector (135) is arranged inside the hollow block (133); an air pump (136) is fixedly installed on the side wall of the front side plate (1); the output end of the air pump (136) is fixedly connected to an air supply pipe (137) with sealed ends; an air outlet pipe (138) is fixedly plugged into the pipe wall of the air supply pipe (137); a connecting hose (139) is installed at the pipe end of the air outlet pipe (138); the connecting hose (139) is connected to the inside of the hollow block (133); and a split flow drying mechanism (15) is installed on the air supply pipe (137); The diversion drying mechanism (15) comprises a plurality of diversion tubes (151) fixedly plugged into the upper tube wall of the air supply tube (137), and each diversion tube (151) is fixedly installed with a mounting block (152), and each end surface of the mounting block (152) is fixedly plugged with an electric heating rod (153). A normally open solenoid valve (154) is installed at a position between the diversion tube (151) and the air outlet tube (138) inside the air supply tube (137), and a normally closed solenoid valve (155) is installed inside the air outlet tube (138). The normally open solenoid valve (154), the normally closed solenoid valve (155) and the electric heating rod (153) are all electrically connected to the controller (5), and the air outlet end of each diversion tube (151) passes through the side wall of the front side plate (1) and is located above the chain transmission assembly (3).

2. The automatic loading and unloading equipment of a pad printer according to claim 1, characterized in that: Each of the support assemblies (8) comprises a plurality of circular grooves (81) formed on two side walls of the support platform (6), and an insulating ring (82) is fixedly connected to the notch of each circular groove (81), an insulating support rod (83) is slidably connected to the inner wall of each insulating ring (82), and a support spring (84) is fixedly provided between the insulating support rod (83) and the insulating ring (82), and one end of each insulating support rod (83) is fixedly connected to the hole wall of the adjustment hole (7).

3. The automatic loading and unloading equipment of a pad printer according to claim 1, characterized in that: The offset adjustment mechanism (9) comprises a transverse push electric push rod (91) fixedly plugged into the side wall of the rear side plate (2), and a transverse push plate (92) is fixedly mounted on the telescopic end of the transverse push electric push rod (91), and fixed plates (93) are fixedly mounted on both ends of the side wall of the transverse push plate (92), and the two fixed plates (93) are respectively arranged on both sides of the same side support platform (6), and the side walls of the two fixed plates (93) facing each other are fixedly connected to electromagnetic blocks (94), and the upper end of the side wall of the support platform (6) is fixedly plugged with two permanent magnets (95) corresponding to the positions of the electromagnetic blocks (94), and the transverse push electric push rod (91) and the two electromagnetic blocks (94) are electrically connected to the controller (5).

4. The automatic loading and unloading equipment of a pad printer according to claim 1, characterized in that: The feeding unit (11) comprises a support plate (111) fixedly arranged between a front side plate (1) and a rear side plate (2); a material storage tube (112) is fixedly plugged into an end surface of the support plate (111); a proximity switch (113) is fixedly plugged into a position of the end surface of the support plate (111) located on one side of the material storage tube (112); a material drop tray (114) is rotatably connected to the lower end of the support plate (111); a material drop hole (115) is provided on the end surface of the material drop tray (114); the material drop hole (115) is arranged below the material storage tube (112); a gear drive assembly (116) is installed on the end surface of the support plate (111); the controller (5) controls the gear drive assembly (116) to operate according to an electrical signal output by the proximity switch (113); and the product in the material storage tube (112) drops onto a mold column (10) installed on the same side through the material drop hole (115).

5. The automatic loading and unloading equipment of a pad printing machine according to claim 2, characterized in that: Each of the early warning units (14) comprises a conductive sleeve (141) sleeved on the outside of an insulating support rod (83), and the conductive sleeve (141) is fixedly connected to the side wall of the insulating circular ring (82) on the same side; the rod wall of the insulating support rod (83) is fixedly sleeved with a conductive ring (142), and the outer diameter of the conductive ring (142) is the same as the inner diameter of the conductive sleeve (141); a socket (143) is fixedly installed at the bottom of the support platform (6); a plug (144) matching the socket (143) is fixedly installed at the top of the hollow block (133); an electromagnetic switch (145) is installed on the side wall of the hollow block (133); the conductive ring (142) and the conductive sleeve (141) on the same side are electrically connected to the electromagnetic switch (145) through the socket (143), the plug (144) and the electromagnetic switch (145), and the electromagnetic switch (145) is electrically connected to the controller (5).

Images