Hot plate die replacing device of hot plate welding machine

Abstract

The invention discloses a hot plate welding machine hot plate mold replacing device which comprises a replacing mechanism used for replacing a mold, the replacing mechanism comprises a front inserting arm assembly, a linear assembly and a steering assembly, the front inserting arm assembly is used for grabbing the mold after being inserted into a hot plate welding machine, the linear assembly is used for driving the front inserting arm assembly to move, and the steering assembly is used for steering the front inserting arm assembly; the steering assembly is used for driving the front insertion arm assembly to rotate and turn over, the lifting table assembly is used for bearing new and old molds, and the lifting table assembly 2 is matched with the replacement mechanism to achieve replacement of the new and old molds; the carrying mechanism is used for bearing the replacing mechanism and the lifting table assembly, and the carrying mechanism comprises a power assembly and a bearing assembly and can drive the mold to move; and the controller is used for controlling the replacement mechanism, the lifting table assembly and the carrying mechanism to work. The replacement mechanism is arranged, the cold mold and the hot mold can be rapidly replaced, the carrying structure is arranged, and the mold conveying function is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hot plate welding machines, in particular to a hot plate mould replacement device for a hot plate welding machine. Background Art

[0002] The hot plate welding machine uses the principle of electric heat melting to weld plastic products. It does not require other solders, and the welding is beautiful and convenient. The hot plate welding machine usually adopts a draw-out plate structure, and uses electric heating to transfer heat to the welding surfaces of the upper and lower plastic heating parts to melt the surface. The heated upper and lower heating parts are welded together through the pneumatic system, and the welding surfaces are solidified and combined into one. The hot plate welding machine mold includes two upper and lower cold molds for fixing the upper and lower workpieces and two hot molds for heating the upper and lower workpieces. The cold mold and the hot mold are usually also provided with positioning columns and depth limit columns and other structures. The cold mold and the hot mold are generally processed as a set according to the shape of the welding workpiece to ensure matching.

[0003] Due to mold damage or product update, the hot plate mold needs to be replaced. The replacement process includes taking out the old mold, putting the new mold into the hot plate welding machine, and transferring and transporting the mold. The existing device cannot automatically pick up and transport the mold. Since the hot mold and the cold mold are installed in different locations and ways, the way of picking up and placing is also different. In addition, during the replacement process, the placement and transportation of the new and old molds need to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a hot plate mold replacement device for a hot plate welding machine, which can transfer and transport molds, take out old molds from the hot plate welding machine, and put new molds into the welding machine, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hot plate mold replacement device for a hot plate welding machine, comprising: a replacement mechanism for replacing the mold, the replacement mechanism comprising a front insert arm assembly, a linear assembly and a steering assembly, the front insert arm assembly is used to insert into the hot plate welding machine and then grab the mold, the linear assembly is used to drive the front insert arm assembly to move, and the steering assembly is used to drive the front insert arm assembly to rotate and flip;

[0006] The lifting platform assembly is used to carry the new and old molds. The lifting platform assembly 2 cooperates with the replacement mechanism to realize the replacement of the new and old molds;

[0007] A carrying mechanism, used to carry the replacement mechanism and the lifting platform assembly, wherein the carrying mechanism includes a power assembly and a load-bearing assembly, and can drive the mold to move;

[0008] The controller is used to control the operation of the replacement mechanism, the lifting platform assembly and the carrying mechanism.

[0009] Preferably, the linear assembly includes a support frame, a plurality of guide rails, a slide seat cooperating with the guide rails, a distance sensor three, a motor one and a screw one, the guide rails are connected to the inner side of the support frame, the slide seat is slidably connected to the guide rails, the motor one is arranged at one end of the support frame, the screw one is connected to the output shaft of the motor, the distance sensor three is arranged on the inner side of the support frame, and the motor one and the distance sensor three are connected to a controller.

[0010] Preferably, the steering assembly includes a rotating module and a flipping module, the rotating module includes a rotating motor and a motor seat, the rotating motor is arranged at the lower part of the slide, the output shaft of the rotating motor passes through the slide and is connected to the motor seat, and the rotating motor is connected to the motor seat.

[0011] Preferably, the flip module includes a support base, an intermediate plate, a flip motor, a connecting shaft and two connecting plates, the support base is connected to one side of the motor base, the lower part of the flip motor is connected to the motor base, the output shaft of the flip motor is connected to the connecting shaft, the connecting plate is sleeved on the outside of the connecting shaft, the connecting plate is connected to the intermediate plate, an observation hole is opened inside the intermediate plate, and the flip motor is connected to the controller.

[0012] Preferably, the front arm assembly comprises a front arm module, a width adjustment module, a buffer module and a distance sensor, and the distance sensor is arranged on one side of the middle plate.

[0013] Preferably, the front insertion arm module includes forearm 1, forearm 2, auxiliary arm 1, auxiliary arm 2, electric cylinder 1, electric cylinder 2 and two forearms 3, the forearm 1 and forearm 2 are respectively connected to the width adjustment module, the two forearms 3 are respectively arranged at the lower parts of the forearm 1 and forearm 2, the electric cylinder 1 is embedded in forearm 1, the electric cylinder 2 is embedded in forearm 2, one forearm 3 is connected to one end of electric cylinder 1, and one forearm 3 is connected to one end of electric cylinder 2, the front ends of the forearm 1, forearm 2 and forearm 3 are all wedge-shaped structures, the auxiliary arm 1 and auxiliary arm 2 are L-shaped structures, and the electric cylinder 1 and electric cylinder 2 are respectively connected to the controller.

[0014] Preferably, the width adjustment module includes an adjustment motor, an adjustment rod, a support plate, a pulling plate, a guide slide column and a through slot, the lower part of the adjustment motor is connected to forearm one, the lower part of the support plate is connected to forearm one, the through slot is provided in the middle plate, the adjustment rod is slidably arranged in the through slot, a thread is provided on the surface of the adjustment rod away from one end of the middle plate, the lower part of the pulling plate is connected to forearm two, one end of the adjustment rod is connected to the pulling plate via a thread, one end of the adjustment rod passes through the support plate and is connected to the output shaft of the adjustment motor, one end of the adjustment rod is threadedly connected to a limiting nut, and the adjustment motor is connected to a controller.

[0015] Preferably, the buffer module includes a nitrogen spring, a control box, a three-way valve and a one-way valve. The control box is arranged on one side of the middle plate, the nitrogen spring is arranged in the control box, a pressure sensor is arranged at one end of the nitrogen spring, the three-way valve is arranged on one side of the control box, one end of the three-way valve is connected to the inflation port of the nitrogen spring, the one-way valve is connected to one end of the three-way valve, and the three-way valve and the pressure sensor are connected to the controller.

[0016] Preferably, the lifting platform assembly includes a lifting electric cylinder, a connecting seat, a placing table, a placing slot opened in the placing table, a plurality of support blocks arranged at the edge of the placing slot, two positioning blocks and a plurality of telescopic rods, the upper part of the lifting electric cylinder is connected to the placing table, the lower part of the lifting electric cylinder is connected to the connecting seat, the plurality of telescopic rods are arranged around the lifting electric cylinder, the upper and lower ends of the telescopic rods are respectively connected to the placing table and the connecting seat, a plurality of sliding grooves are opened on both sides of the placing table, connecting bolts are slidably arranged in the sliding grooves, the lower part of the positioning block is threadedly connected to the connecting bolts, the height of the support block is not less than the thickness of the forearm, the height of the positioning block matches the height of the support block, and the lifting electric cylinder is connected to the controller.

[0017] Preferably, the power component includes an AGV vehicle and a lifting electric cylinder, the load-bearing component includes a carrying box and a carrying plate, the controller and the lifting electric cylinder are both arranged inside the carrying box, the bottom of the carrying box is connected to the upper part of the AGV vehicle, the upper part of the carrying box is provided with a notch that cooperates with the carrying plate, the upper part of the carrying plate is provided with a guide groove that cooperates with the rotating motor, one side of the carrying box is provided with a groove that cooperates with the guide groove, the lower part of the support frame is connected to the carrying plate, the upper part of the lifting electric cylinder is connected to the lower part of the carrying plate, the lower part of the connecting seat is connected to the AGV vehicle, a distance sensor four is arranged inside the carrying box, and the lifting electric cylinder and the distance sensor four are connected to the controller; an air source is arranged inside the carrying box, one end of the three-way valve is connected to the air source, a height block that cooperates with the positioning block is arranged on the side of the upper part of the carrying box close to the rotating motor, a distance sensor two is embedded in the height block, and the distance sensor two is connected to the controller.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the mold can be replaced by a replacement mechanism, the old and new molds can be placed by a lifting platform assembly, and the transfer and transportation of the mold can be achieved by a carrying mechanism.

[0020] 2. In the present invention, the front insertion arm module includes forearm 1, forearm 2, auxiliary arm 1, auxiliary arm 2, electric cylinder 1, electric cylinder 2 and two forearms 3. This structure can adapt to the lifting and fixing of cold molds and hot molds; the width adjustment module includes an adjustment motor, an adjustment rod, a support plate, a pulling plate, a guide slide column and a through groove. The distance between forearm 1 and forearm 2 can be adjusted through the width adjustment module to adapt to molds of different sizes; at the same time, when replacing some hot molds, it can be used to provide clamping force for forearm 1 and forearm 2.

[0021] 3. In the present invention, when the forearm module moves, the nitrogen spring is used for buffering to prevent the device on the middle plate from colliding with the mold; at the same time, in cooperation with the pressure sensor at the front end of the nitrogen spring, when the nitrogen spring is squeezed, the pressure signal is used as a switch signal, and the controller starts to record the forward movement distance of the forearm 1 and the forearm 2, that is, the compression distance of the nitrogen spring. This data can be used when a new mold is taken from the placement table in the later stage. When taking the mold, the nitrogen spring is compressed by the same distance, so as to determine the position of the connected forearm 1 and the forearm 2 relative to the mold. When transporting to the inside of the hot plate welding machine, it is only necessary to control the movement distance of the slide seat, which is conducive to the alignment of the holes between the mold and the internal fixing mechanism of the hot plate welding machine.

[0022] 4. In the present invention, a control box, a three-way valve, a one-way valve and an air source are also provided to cooperate with the nitrogen spring. The air source and the nitrogen spring are connected through the controller, and a certain amount of nitrogen is injected into the nitrogen spring to make the piston of the nitrogen spring move upward. The mold is pushed by the nitrogen spring, and the position of the slide is adjusted by the rotation of the motor. The two cooperate with each other to provide a variety of adjustment methods for alignment during installation, which increases the convenience of alignment. The three-way valve is controlled by the controller to connect the one-way valve and the nitrogen spring, which can be used for exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of the hot plate mold replacement device of the hot plate welding machine of the present invention;

[0024] Figure 2 For the present invention Figure 1 A side view structural schematic diagram of;

[0025] Figure 3 For the present invention Figure 1 A partial cross-sectional view of

[0026] Figure 4 It is a schematic structural diagram of the front insert arm assembly of the present invention;

[0027] Figure 5 For the present invention Figure 4 A side view structural schematic diagram of;

[0028] Figure 6It is a schematic diagram of replacing the upper cold mold when replacing the structure in some embodiments of the present invention;

[0029] Figure 7 For the present invention Figure 6 A side view structural schematic diagram of;

[0030] Figure 8 Schematic diagram I of replacing the upper hot mold when replacing the structure in some embodiments of the present invention;

[0031] Fig. 9 For the present invention Figure 8 A side view structural schematic diagram of;

[0032] Fig.10 Schematic diagram II of replacing the upper hot mold when replacing the structure in some embodiments of the present invention;

[0033] Fig.11 For the present invention Fig.10 Side view of

[0034] Fig.12 A schematic diagram of the structure of the front insert arm assembly after flipping over the hot mold in one embodiment of the invention;

[0035] Fig.13 For the present invention Fig.12 Bottom view of

[0036] Fig.14 It is a schematic diagram of the structure of the mold during transportation in some embodiments of the present invention;

[0037] Fig.15 Schematic diagram of the hot plate mold structure of the present invention.

[0038] In the figure: replacement mechanism 1, lifting platform assembly 2, carrying mechanism 3, controller 4, front arm assembly 11, linear assembly 12, steering assembly 13, power assembly 31, load-bearing assembly 32, lifting electric cylinder 201, connecting seat 202, placement table 203, placement slot 204, support block 205, positioning block 206, telescopic rod 207, slide slot 208, connecting bolt 209, front arm module 111, width adjustment module 112, buffer module 113, distance sensor 114, nitrogen spring 1131, control box 1132, three-way valve 1133, one-way valve 1134, pressure sensor 1135, support frame 1201, guide rail 1202, slide seat 1203, distance sensor three 1204, motor one 1205, screw one 1206, rotation module 1301, flip module 1302, rotation Rotating motor 13011, motor seat 13012, supporting seat 13021, middle plate 13022, flipping motor 13023, connecting shaft 13024, connecting plate 13025, observation hole 13026, forearm 1 1111, forearm 2 1112, auxiliary arm 1 1113, auxiliary arm 2 1114, electric cylinder 1 1115, electric cylinder 2 1116, forearm 3 1117, adjustment motor 112 1. Adjustment rod 1122, support plate 1123, pulling plate 1124, guide slide column 1125, through groove 1126, thread 1127, limit nut 1128, AGV vehicle 3101, lifting cylinder 3102, carrying box 3103, carrying plate 3104, guide groove 3105, distance sensor 4 3106, air source 3107, height block 3108, distance sensor 2 3109. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] It should be noted that the mold of the hot plate welding machine in this embodiment is as follows Fig.15 As shown, the cold mold located at the top is described as the upper cold mold in the text, and the hot mold located at the top is described as the upper hot mold in the text.

[0043] See also Figure 1-14 The present invention provides a technical solution: a hot plate mold replacement device for a hot plate welding machine, comprising a replacement mechanism 1, a lifting platform assembly 2, a carrier mechanism 3 and a controller 4. The replacement mechanism 1 is used for replacing the mold, the lifting platform assembly 2 is used for carrying the new and old molds; the carrier mechanism 3 is used for carrying the replacement mechanism 1 and the lifting platform assembly 2, and the controller 4 is used for controlling the replacement mechanism 1, the lifting platform assembly 2 and the carrier mechanism 3 to work.

[0044] The replacement mechanism 1 includes a front arm assembly 11, a linear assembly 12 and a steering assembly 13. The front arm assembly 11 is used to be inserted into the hot plate welding machine and grab the mold. The linear assembly 12 is used to drive the front arm assembly 11 to move. The steering assembly 13 is used to drive the front arm assembly 11 to rotate and flip. The front arm assembly 11 includes a front arm module 111, a width adjustment module 112, a buffer module 113 and a distance sensor 114. The distance sensor 114 is installed on one side of the middle plate 13022. The linear assembly 12 includes a support frame 1201, a plurality of guide rails 1202, a slide 1203 cooperating with the guide rails 1202, a distance sensor three 1204, a motor 1205 and a screw 1206. The guide rails 1202 are connected to the inner side of the support frame 1201, the slide 1203 is slidably connected to the guide rails 1202, the motor 1205 is installed at one end of the support frame 1201, the screw 1206 is connected to the output shaft of the motor, the distance sensor three 1204 is installed on the inner side of the support frame 1201, and the motor 1205 and the distance sensor three 1204 are connected to the controller 4.

[0045] The steering assembly 13 includes a rotating module 1301 and a flipping module 1302. The rotating module 1301 includes a rotating motor 13011 and a motor seat 13012. The rotating motor 13011 is installed at the lower part of the slide 1203. The output shaft of the rotating motor 13011 passes through the slide 1203 and is connected to the motor seat 13012. The rotating motor 13011 is connected to the motor seat 13012.

[0046] The flip module 1302 includes a support base 13021, an intermediate plate 13022, a flip motor 13023, a connecting shaft 13024 and two connecting plates 13025. The support base 13021 is connected to one side of the motor base 13012, the lower part of the flip motor 13023 is connected to the motor base 13012, the output shaft of the flip motor 13023 is connected to the connecting shaft 13024, the connecting plate 13025 is sleeved on the outside of the connecting shaft 13024, the connecting plate 13025 is connected to the intermediate plate 13022, an observation hole 13026 is opened inside the intermediate plate 13022, and the flip motor 13023 is connected to the controller 4.

[0047] The front insertion arm module 111 includes a forearm 1 1111, a forearm 2 1112, an auxiliary arm 1 1113, an auxiliary arm 2 1114, an electric cylinder 1 1115, an electric cylinder 2 1116 and two forearms 3 1117. The forearm 1 1111 and the forearm 2 1112 are respectively connected to the width adjustment module 112. The two forearms 3 1117 are respectively installed at the lower parts of the forearm 1 1111 and the forearm 2 1112. The electric cylinder 1 1115 is embedded in the forearm 1 111 1, the electric cylinder 2 1116 is embedded in the forearm 2 1112, a forearm 3 1117 is connected to one end of the electric cylinder 1 1115, and a forearm 3 1117 is connected to one end of the electric cylinder 2 1116. The front ends of the forearms 1 1111, 1112 and 1117 are all wedge-shaped structures, the auxiliary arms 1 1113 and 1114 are L-shaped structures, and the electric cylinders 1 1115 and 1116 are respectively connected to the controller 4.

[0048] The width adjustment module 112 includes an adjustment motor 1121, an adjustment rod 1122, a support plate 1123, a pulling plate 1124, a guide slide column 1125 and a through slot 1126. The lower part of the adjustment motor 1121 is connected to the forearm 1 1111, the lower part of the support plate 1123 is connected to the forearm 1 1111, the through slot 1126 is provided in the middle plate 13022, the adjustment rod 1122 is slidably installed in the through slot 1126, the surface of the adjustment rod 1122 away from the end of the middle plate 13022 is provided with a thread 1127, the lower part of the pulling plate 1124 is connected to the forearm 2 1112, one end of the adjustment rod 1122 is connected to the pulling plate 1124 through the thread 1127, one end of the adjustment rod 1122 passes through the support plate 1123 and is connected to the output shaft of the adjustment motor 1121, one end of the adjustment rod 1122 is threadedly connected to the limiting nut 1128, and the adjustment motor 1121 is connected to the controller 4.

[0049] The buffer module 113 includes a nitrogen spring 1131, a control box 1132, a three-way valve 1133 and a one-way valve 1134. The control box 1132 is installed on one side of the middle plate 13022, the nitrogen spring 1131 is installed in the control box 1132, a pressure sensor 1135 is installed at one end of the nitrogen spring 1131, the three-way valve 1133 is installed on one side of the control box 1132, one end of the three-way valve 1133 is connected to the nitrogen spring 1131, the one-way valve 1134 is connected to one end of the three-way valve 1133, and the three-way valve 1133 and the pressure sensor 1135 are connected to the controller 4.

[0050] The lifting platform assembly 2 cooperates with the replacement mechanism 1 to realize the replacement of the old and new molds; the lifting platform assembly 2 includes a lifting electric cylinder 201, a connecting seat 202, a placing platform 203, a placing groove 204 provided in the placing platform 203, a plurality of support blocks 205 installed on the edge of the placing groove 204, two positioning blocks 206 and a plurality of telescopic rods 207, the upper part of the lifting electric cylinder 201 is connected to the placing platform 203, the lower part of the lifting electric cylinder 201 is connected to the connecting seat 202, and the plurality of telescopic rods 207 surround the lifting electric cylinder 201. Installed around the lifting electric cylinder 201, the upper and lower ends of the telescopic rod 207 are respectively connected to the placement platform 203 and the connecting seat 202, a number of slide grooves 208 are opened on both sides of the placement platform 203, and connecting bolts 209 are slidably installed in the slide grooves 208. The lower part of the positioning block 206 is threadedly connected to the connecting bolts 209. The height of the support block 205 is not less than the thickness of the forearm 1111. The height of the positioning block 206 matches the height of the support block 205, and the lifting electric cylinder 201 is connected to the controller 4.

[0051] The transport mechanism 3 includes a power assembly 31 and a load-bearing assembly 32, which can drive the mold to move; the power assembly 31 includes an AGV vehicle 3101 and a lifting electric cylinder 3102, the load-bearing assembly 32 includes a carrying box 3103 and a carrying plate 3104, the controller 4 and the lifting electric cylinder 3102 are both installed inside the carrying box 3103, the bottom of the carrying box 3103 is connected to the upper part of the AGV vehicle 3101, the upper part of the carrying box 3103 is provided with a notch that matches the carrying plate 3104, and the upper part of the carrying plate 3104 is provided with a notch that matches the carrying plate 3104. A guide groove 3105 is provided to cooperate with the rotating motor 13011, a groove to cooperate with the guide groove 3105 is provided on one side of the carrying box 3103, the lower part of the support frame 1201 is connected to the carrying plate 3104, the upper part of the lifting electric cylinder 3102 is connected to the lower part of the carrying plate 3104, the lower part of the connecting seat 202 is connected to the AGV vehicle 3101, a distance sensor 4 3106 is installed inside the carrying box 3103, and the lifting electric cylinder 3102 and the distance sensor 4 3106 are connected to the controller 4;

[0052] An air source 3107 is installed inside the carrying box 3103, one end of the three-way valve 1133 is connected to the air source 3107, and a height block 3108 cooperating with the positioning block 206 is installed on the upper side of the carrying box 3103 close to the rotating motor 13011, and a distance sensor 2 3109 is embedded in the height block 3108, and the distance sensor 2 3109 is connected to the controller 4.

[0053] Working principle: In some embodiments, Figure 6-7As shown, if the mold to be replaced is the upper cold mold, the upper cold mold is usually located at a high position inside the hot plate welding machine. The height of the carrier plate 3104 is adjusted by the lifting electric cylinder 3102 to adjust the height of the replacement mechanism 1 so that the height of the replacement mechanism 1 matches the height of the upper cold mold. The controller 4 controls the motor 1205 to start, drive the screw 1206 to rotate, and the screw 1206 drives the slide 1203 to slide on the guide rail 1202, and the replacement mechanism 1 on the slide seat is sent into the hot plate welding machine chassis. The distance sensor 3 1204 is used to measure the moving distance of the slide 1203. The forearm module in the replacement mechanism 1 is used to lift the upper cold mold. After the upper cold mold is removed, the controller 4 controls the motor 1205 to reverse, and drives the replacement mechanism 1 and the upper cold mold to move to the outside of the hot plate welding machine through the slide 1203. Then, the controller 4 controls the rotating motor 13011 to rotate 90 degrees, and rotates the mold to the upper part of the placement table 203. The controller 4 starts the lifting cylinder 201 to lift the placement table 203, so that the lower part of the cold mold enters the placement groove 204. When the distance sensor 2 3109 detects the positioning block 206, the distance information is transmitted to the controller 4. The controller 4 controls the lifting cylinder 201 to stop. At this time, the three support blocks 205 support the front and rear of the upper cold mold. The function of the height block 3108 is to make the height of the distance sensor 2 3109 match the height of the positioning block 206, so that when the distance sensor 2 3109 detects the positioning block 206, the upper part of the support block 205 just contacts the lower part of the mold. At this time, the controller 4 controls the adjustment motor 1121 to rotate, and the adjustment motor 1121 drives the adjustment screw to rotate, so that the forearm 1 1111 and the forearm 2 1112 move to both sides and withdraw from both sides of the upper cold mold; then the controller 4 controls the lifting electric cylinder 201 to contract, driving the upper cold mold to move downward, and detects the mold position through the distance sensor 2 3109. When the lower cold mold moves below the upper surface of the carrying box 3103, the controller 4 controls the lifting electric cylinder 201 to stop, and then controls the rotating motor 13011 to rotate to turn the replacement mechanism 1 back to its original position.

[0054] The specific process of the replacement mechanism 1 lifting the mold is as follows: first, the lifting cylinder 3102 can be started through the controller 4 to lift the carrier plate 3104, raise the replacement mechanism 1 on it, and measure the rising distance of the carrier plate 3104 through the distance sensor 4 3106; the forearm 1 1111 and the forearm 2 1112 in the front arm module 111 move toward the bottom of the mold under the drive of the linear component 12, and the piston rod of the nitrogen spring 1131 can contact the side of the mold. At this time, the pressure sensor 1135 senses the pressure signal and transmits the pressure signal to the controller 4. The controller 4 records the distance information measured by the distance sensor 114 at this time, and the forearm 1 1111 and the forearm 2 1112 are moved to the bottom of the mold by the linear component 12. 12 continues to move forward, and after moving to a certain distance, the distance measuring sensor 114 measures the distance information again. If the difference between the two measured distance values ​​is the same as the preset value, the movement is stopped. The difference between the two measured distance information is also the distance that the nitrogen spring 1131 is compressed. The controller 4 controls the motor 1205 to stop moving, and then starts the electric cylinder 1115 and the electric cylinder 2 1116. The electric cylinder 1 1115 and the electric cylinder 2 1116 drive the forearm 3 1117 to approach the positioning axis of the upper cold mold, and tighten the upper cold mold from both sides. The forearm 3 1117 is an L-shaped structure, which is used to hook the positioning axis of the upper cold mold to prevent the upper cold mold from sliding or even falling off when the forearm 1 1111 and the forearm 2 1112 are retracted.

[0055] In some embodiments, Figure 8-9 As shown, what needs to be replaced is the upper hot mold, which is usually installed on the upper part of the track. The replacement mechanism 1 can be controlled by the controller 4 to go deep into the hot plate welding machine, and the height of the forearm module can be adjusted by the lifting electric cylinder 3102 (the specific process has been described in the previous text and will not be repeated here), so that the lower surface of the forearm 1 1111 and the forearm 2 1112 is parallel to the lower surface of the upper hot mold, and after the connection between the upper hot mold and the hot plate welding machine is removed, the forearm 1 1111 and the forearm 2 1112 are driven by the linear component 12 to move to the side set position of the upper hot film, and then the width of the forearm 1 1111 and the forearm 2 1112 is adjusted by the width adjustment component, so that the two clamp the upper hot mold from the side, and the forearm 3 1117 is used for auxiliary clamping, and the linear module is controlled to drive the forearm module to take out the upper hot mold from the hot plate welding machine, and the forearm module is driven to rotate 90 degrees by the steering component 13, and the upper hot mold is placed on the placement table 203.

[0056] In some embodiments, Figure 10-11 As shown, the upper hot mold is heavy and cannot be safely transferred to the placement table 203 by relying solely on the clamping force of forearm 1 1111 and forearm 2 1112. At this time, it is necessary to adjust the forward distance of the front insertion arm module 111 through a linear mechanism so that the two forearms 3 1117 are inserted into the lower part of the upper hot mold to support the upper hot mold from the bottom.

[0057] The specific process of the replacement mechanism 1 taking out the upper hot mold by clamping is as follows: the lower surfaces of the forearm 1 1111 and the forearm 2 1112 are pressed against the surface of the upper hot mold and slide forward. When the front end of the nitrogen spring 1131 contacts the heating part of the upper hot mold, the pressure sensor 1135 transmits the pressure signal to the controller 4. The controller 4 controls the motor 1205 to stop, and then starts the adjustment motor 1121 to drive the adjustment rod 1122 to rotate, and drives the pulling piece 1124 threadedly connected to the adjustment rod 1122 to move. The pulling piece 1124 drives the forearm 2 1112 to approach the side of the upper hot mold. When the forearm 2 111 2 After contacting the upper hot mold, the adjustment motor 1121 continues to rotate. Under the action of the reaction force, the forearm 1111 also approaches the upper hot mold from the side and finally contacts the other side surface of the upper hot mold; the controller 4 starts the electric cylinder 1115 and the electric cylinder 2 1116, and the electric cylinder 1115 and the electric cylinder 2 1116 extend, pushing out the auxiliary arm 1113 and the auxiliary arm 2 1114 to clamp the side of the upper hot mold; finally, the controller 4 controls the motor 1205 to reverse, driving the slide 1203 to move, and the slide 1203 drives the replacement mechanism 1 to take the upper hot mold out of the hot plate welding machine. The process of placing the upper hot mold on the placement table 203 is similar to the process of placing the upper cold mold, and will not be described in detail here. The difference is that when placing the upper hot mold, the heating part of the mold faces upward.

[0058] In some embodiments, if the upper heating mold is heavy and the heating portion is high, during the replacement process, in order to ensure the safety of mold transportation, the mold needs to be placed in the placement slot 204 with the heating portion facing downward, that is, it needs to be flipped. Figure 12-13 As shown; the mold can be flipped by the flip module 1302, specifically: after the mold is taken out, the rotation motor 13011 is controlled to rotate, and the insertion arm assembly is rotated 90 degrees counterclockwise, at this time, the forearm 1111 is perpendicular to the support frame 1201, and then the flip motor 13023 in the flip module 1302 is started, and the flip motor 13023 drives the connecting shaft 13024 to rotate, and the connecting shaft 13024 drives the middle plate 13022 to rotate, and the middle plate 130 22 drives the guide slide 1125 and the adjustment rod 1122 to rotate, the adjustment rod 1122 and the guide slide 1125 drive the forearm 1111 and the forearm 2 1112 to rotate, the forearm 1111 and the forearm 2 1112 drive the upper hot mold to rotate, under the limit of the support seat 13021, the rotating shaft rotates 180 degrees, at this time, the heating part of the upper hot mold faces downward, and then, start the motor 1205, and drive the replacement mechanism 1 and the mold to move to the upper part of the placement table 203 through the slide 1203.

[0059] The purpose of installing the buffer module 113 is to use the nitrogen spring 1131 for buffering when the forearm module moves, so as to prevent the device on the middle plate 13022 from colliding with the mold; at the same time, it cooperates with the pressure sensor 1135 at the front end of the nitrogen spring 1131. When the nitrogen spring 1131 is squeezed, the pressure signal is used as a switch signal, and the controller 4 starts to record the forward movement distance of the forearm 1111 and the forearm 2 1112, that is, the compression distance of the nitrogen spring 1131. This data can be used when a new mold is taken from the placement table 203 at a later stage. When taking the mold, the nitrogen spring 1131 is compressed by the same distance, so as to determine the position of the forearm 1 1111 and the forearm 2 1112 relative to the mold, and when the heat plate is heated, the pressure sensor 1135 is used to press the forearm 1 1111 and the forearm 2 1112 to the heat plate. When conveying inside the welding machine, it is only necessary to control the moving distance of the slide 1203, which is conducive to the alignment of the holes between the mold and the internal fixing mechanism of the hot plate welding machine; in addition, in order to ensure the alignment effect, a three-way valve 1133, a one-way valve 1134 and an air source 3107 are installed, and the air source 3107 and the nitrogen spring 1131 are connected through the controller 4, and a certain amount of nitrogen is injected into the nitrogen spring 1131 to make the piston of the nitrogen spring 1131 move upward (the structure and working principle of the nitrogen spring are prior art and will not be repeated), and the mold is pushed by the nitrogen spring 1131, and the motor 1205 rotates to adjust the position of the slide 1203. The two cooperate with each other, providing multiple ways for alignment during installation, and ensuring the accuracy of alignment. The controller 4 is provided to control the three-way valve 1133 to connect the one-way valve 1134 and the nitrogen spring 1131, which can be used for exhaust, and the conduction pressure difference of the one-way valve 1134 can be configured according to the internal pressure range of the nitrogen spring 1131.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot plate mold replacement device for a hot plate welding machine, characterized in that: include: A replacement mechanism (1) is used for replacing a mold, the replacement mechanism (1) comprising a front insert arm assembly (11), a straight line assembly (12) and a steering assembly (13), the front insert arm assembly (11) being used to insert into a hot plate welding machine and then grab the mold, the straight line assembly (12) being used to drive the front insert arm assembly (11) to move, and the steering assembly (13) being used to drive the front insert arm assembly (11) to rotate and flip; A lifting platform assembly (2) is used to carry the new and old molds, and the lifting platform assembly (2) cooperates with the replacement mechanism (1) to achieve the replacement of the new and old molds; A transport mechanism (3) is used to carry the replacement mechanism (1) and the lifting platform assembly (2), wherein the transport mechanism (3) comprises a power assembly (31) and a load-bearing assembly (32), and can drive the mold to move; The controller (4) is used to control the operation of the replacement mechanism (1), the lifting platform assembly (2) and the transport mechanism (3).

2. The hot plate mold replacement device for hot plate welding machine according to claim 1, characterized in that: The linear assembly (12) comprises a support frame (1201), a plurality of guide rails (1202), a slide seat (1203) matched with the guide rails (1202), a distance sensor three (1204), a motor one (1205) and a screw rod one (1206), wherein the guide rail (1202) is connected to the inner side of the support frame (1201), the slide seat (1203) is slidably connected to the guide rail (1202), the motor one (1205) is arranged at one end of the support frame (1201), the screw rod one (1206) is connected to the output shaft of the motor, the distance sensor three (1204) is arranged on the inner side of the support frame (1201), and the motor one (1205) and the distance sensor three (1204) are connected to the controller (4).

3. The hot plate mold replacement device for hot plate welding machine according to claim 1, characterized in that: The steering assembly (13) comprises a rotating module (1301) and a flipping module (1302); the rotating module (1301) comprises a rotating motor (13011) and a motor seat (13012); the rotating motor (13011) is arranged at the lower part of the slide seat (1203); the output shaft of the rotating motor (13011) passes through the slide seat (1203) and is connected to the motor seat (13012); the rotating motor (13011) is connected to the motor seat (13012).

4. The hot plate mold replacement device for hot plate welding machine according to claim 3, characterized in that: The flip module (1302) comprises a support seat (13021), an intermediate plate (13022), a flip motor (13023), a connecting shaft (13024) and two connecting plates (13025); the support seat (13021) is connected to one side of a motor seat (13012); the lower part of the flip motor (13023) is connected to the motor seat (13012); the output shaft of the flip motor (13023) is connected to the connecting shaft (13024); the connecting plate (13025) is sleeved on the outside of the connecting shaft (13024); the connecting plate (13025) is connected to the intermediate plate (13022); an observation hole (13026) is provided inside the intermediate plate (13022); and the flip motor (13023) is connected to a controller (4).

5. The hot plate mold replacement device for hot plate welding machine according to claim 4, characterized in that: The front insertion arm assembly (11) comprises a front insertion arm module (111), a width adjustment module (112), a buffer module (113) and a distance sensor (114), wherein the distance sensor (114) is arranged on one side of the middle plate (13022).

6. The hot plate mold replacement device for hot plate welding machine according to claim 5, characterized in that: The front insertion arm module (111) comprises a forearm 1 (1111), a forearm 2 (1112), an auxiliary arm 1 (1113), an auxiliary arm 2 (1114), an electric cylinder 1 (1115), an electric cylinder 2 (1116) and two forearms 3 (1117); the forearm 1 (1111) and the forearm 2 (1112) are respectively connected to the width adjustment module (112); the two forearms 3 (1117) are respectively arranged at the lower part of the forearm 1 (1111) and the forearm 2 (1112); the electric cylinder 1 (1115) is embedded in the forearm 1 (1111) ), the electric cylinder 2 (1116) is embedded in the forearm 2 (1112), one forearm 3 (1117) is connected to one end of the electric cylinder 1 (1115), one forearm 3 (1117) is connected to one end of the electric cylinder 2 (1116), the front ends of the forearm 1 (1111), forearm 2 (1112) and forearm 3 (1117) are all wedge-shaped structures, the auxiliary arm 1 (1113) and auxiliary arm 2 (1114) are L-shaped structures, and the electric cylinder 1 (1115) and the electric cylinder 2 (1116) are respectively connected to the controller (4).

7. The hot plate mold replacement device for hot plate welding machine according to claim 6, characterized in that: The width adjustment module (112) comprises an adjustment motor (1121), an adjustment rod (1122), a support plate (1123), a pull plate (1124), a guide slide column (1125) and a through slot (1126); the lower portion of the adjustment motor (1121) is connected to the forearm 1 (1111); the lower portion of the support plate (1123) is connected to the forearm 1 (1111); the through slot (1126) is provided in the middle plate (13022); the adjustment rod (1122) is slidably arranged in the through slot (1126); the adjustment rod (1122) ) is provided with a thread (1127) on the surface of one end away from the middle plate (13022), the lower part of the pulling piece (1124) is connected to the second forearm (1112), one end of the adjusting rod (1122) is connected to the pulling piece (1124) via the thread (1127), one end of the adjusting rod (1122) passes through the supporting piece (1123) and is connected to the output shaft of the adjusting motor (1121), one end of the adjusting rod (1122) is connected to a limiting nut (1128) via the thread (1127), and the adjusting motor (1121) is connected to the controller (4).

8. The hot plate mold replacement device for hot plate welding machine according to claim 5, characterized in that: The buffer module (113) comprises a nitrogen spring (1131), a control box (1132), a three-way valve (1133) and a one-way valve (1134); the control box (1132) is arranged on one side of the middle plate (13022); the nitrogen spring (1131) is arranged in the control box (1132); a pressure sensor (1135) is arranged at one end of the nitrogen spring (1131); the three-way valve (1133) is arranged on one side of the control box (1132); one end of the three-way valve (1133) is connected to the nitrogen spring (1131); the one-way valve (1134) is connected to one end of the three-way valve (1133); and the three-way valve (1133) and the pressure sensor (1135) are connected to a controller (4).

9. The hot plate mold replacement device for hot plate welding machine according to claim 6, characterized in that: The lifting platform assembly (2) comprises a lifting electric cylinder (201), a connecting seat (202), a placing platform (203), a placing groove (204) provided in the placing platform (203), a plurality of supporting blocks (205) arranged at the edge of the placing groove (204), two positioning blocks (206) and a plurality of telescopic rods (207); the upper part of the lifting electric cylinder (201) is connected to the placing platform (203); the lower part of the lifting electric cylinder (201) is connected to the connecting seat (202); the plurality of telescopic rods (207) are arranged around the lifting electric cylinder (201); the telescopic rods (207) The upper and lower ends of the support block (207) are respectively connected to the placement platform (203) and the connection seat (202); a plurality of slide grooves (208) are provided on both sides of the placement platform (203); a connection bolt (209) is slidably arranged in the slide groove (208); the lower part of the positioning block (206) is connected to the connection bolt (209) thread (1127); the height of the support block (205) is not less than the thickness of the forearm (1111); the height of the positioning block (206) matches the height of the support block (205); and the lifting electric cylinder (201) is connected to the controller (4).

10. The hot plate mold replacement device for hot plate welding machine according to claim 8, characterized in that: The power assembly (31) includes an AGV vehicle (3101) and a lifting electric cylinder (3102), the load-bearing assembly (32) includes a carrying box (3103) and a carrying plate (3104), the controller (4) and the lifting electric cylinder (3102) are both arranged inside the carrying box (3103), the bottom of the carrying box (3103) is connected to the upper part of the AGV vehicle (3101), the upper part of the carrying box (3103) is provided with a notch that matches the carrying plate (3104), the upper part of the carrying plate (3104) is provided with a guide groove (3105) that matches the rotating motor (13011), one side of the carrying box (3103) is provided with a groove that matches the guide groove (3105), the lower part of the support frame (1201) is connected to the carrying plate (3104), the lifting electric cylinder ( The upper part of the connecting seat (202) is connected to the lower part of the bearing plate (3104), the lower part of the connecting seat (202) is connected to the AGV vehicle (3101), the bearing box (3103) is provided with a distance sensor four (3106), the lifting cylinder (3102) and the distance sensor four (3106) are connected to the controller (4); the bearing box (3103) is provided with an air source (3107), one end of the three-way valve (1133) is connected to the air source (3107), the upper part of the bearing box (3103) is provided with a height block (3108) matched with the positioning block (206) on one side close to the rotating motor (13011), the height block (3108) is embedded with a distance sensor two (3109), and the distance sensor two (3109) is connected to the controller (4).

Images