CN219256217U - Double-lower-die forming production equipment - Google Patents

Abstract

The utility model relates to the technical field of rubber production and processing equipment, in particular to double-lower-die forming production equipment which comprises a vulcanizing machine body and a die changing device, wherein an upper die and a lower die are arranged on the vulcanizing machine body; the die changing device comprises a base and a die changing seat arranged on the base, two groups of slide ways for placing the lower die are arranged on the die changing seat at intervals, the lower die is in sliding fit with the slide ways, the lower die for replacement is arranged on one group of slide ways, a sliding component for driving the lower die to move between the die changing seat and the lifting seat is arranged on the lifting seat, and a moving piece for driving the die changing seat to move along the arrangement direction of the two groups of slide ways is arranged on the base. The utility model has the effects of improving production efficiency and reducing energy consumption.

Description

Double-lower-die forming production equipment

Technical Field

The utility model relates to the technical field of rubber production and processing equipment, in particular to double-lower-die forming production equipment.

Background

The vulcanizer is a main device for vulcanizing and forming various rubber and plastic products and is widely applied to industrial production. The vulcanization is also called crosslinking and curing, and the process of converting linear macromolecules into three-dimensional network structures under the condition of a certain temperature and a certain pressure by adding crosslinking auxiliary agents such as a vulcanizing agent, an accelerator and the like into rubber sizing materials.

At present, in the production process of a vulcanizing machine, generally, after a rubber material is vulcanized in a mold at high temperature and high pressure for a set time, the mold is moved out of a vulcanizing machine main body, and then a vulcanized product in the mold is taken out, but the production process has some problems; when the product in the die is taken out, the vulcanizing machine is in an idle state, and the die is moved back to the vulcanizing machine after the product is taken out to carry out next vulcanization, so that the production efficiency is reduced; meanwhile, in order to achieve the high-temperature condition, the vulcanizing machine is provided with the electric heating plate for heating the die, when the vulcanizing machine is in an idle state, the electric heating plate is in a high-temperature state, heat of the electric heating plate is continuously lost in the idle process of the vulcanizing machine, time and electric power are required to be consumed for reheating in the next vulcanization, and the part of wasted energy is integrated into a small cost for manufacturers in each vulcanization. Therefore, improvements to these problems with current vulcanizers are needed.

Disclosure of Invention

The utility model provides double-lower-die forming production equipment aiming at the problems of the prior art, and aims to solve the problems of low production efficiency and energy waste in the existing vulcanizing machine.

The utility model provides a double lower die forming production device, which adopts the following technical scheme:

the double-lower die forming production equipment comprises a vulcanizing machine body and a die changing device, wherein an upper die and a lower die are arranged on the vulcanizing machine body, a lifting seat is arranged on the vulcanizing machine body and is connected with the vulcanizing machine body in a sliding manner, the lower die is positioned on the upper surface of the lifting seat, and a driving piece for driving the lifting seat to move close to or far away from the upper die is arranged on the vulcanizing machine body; the die changing device comprises a base and die changing bases arranged on the base, two groups of slide ways used for placing the lower die are arranged on the die changing bases at intervals, the lower die is matched with the slide ways in a sliding mode, a group of lower dies used for replacement are arranged on the slide ways, sliding components used for driving the lower die to move between the die changing bases and the lifting bases are arranged on the lifting bases, and moving parts used for driving the die changing bases to move along the arrangement directions of the two groups of slide ways are arranged on the base.

Still further, the driving piece include vertical set up in pneumatic cylinder on the organism, the piston rod of pneumatic cylinder fixed connection in the base.

Still further, the subassembly that slides including the level set up in slip cylinder on the lifting seat, set up in installation piece on the slip cylinder piston rod, set up in two blocks of drawing on the installation piece, one side of bed die is provided with two grafting pieces, the transversal T shape setting of personally submitting of grafting piece is provided with the jack-in groove on drawing the piece, the jack-in groove is T shape setting, the grafting piece with the jack-in groove grafting cooperation, when changing the bed die, the moving part drive the bed die remove to the jack-in piece peg graft in the jack-in groove.

Still further, the moving part comprises a moving cylinder vertically arranged on the base, a piston rod of the moving cylinder is fixedly connected with the die changing seat, a plurality of guide posts are vertically arranged on the base, and the guide posts movably penetrate through the die changing seat.

Still further, be provided with the gyro wheel on the die holder, the gyro wheel is located slide department, the gyro wheel is located the bed die below, the gyro wheel with the bed die rolling fit.

Still further, two opposite lateral surfaces of the die changing seat are horizontally provided with limiting cylinders, a piston rod of each limiting cylinder is provided with a limiting block, each limiting block movably penetrates through the side wall of the die changing seat to extend into the die changing seat, two opposite lateral sides of the lower die are provided with limiting holes, and each limiting block is in plug-in fit with each limiting hole.

Still further, be provided with electric heated board in the die holder, be provided with the heat preservation cylinder on the base, the piston rod of heat preservation cylinder connect in electric heated board, the piston rod extension drive of heat preservation cylinder electric heated board laminate in the lower surface of bed die.

In summary, the present utility model includes at least one of the following beneficial technical effects:

the two lower dies are continuously replaced in a circulating way, so that the lower electric heating plate, the upper die and the upper electric heating plate are always in a working state, the situation that an operator is in an idle state when taking a rubber product is avoided, heat is dissipated, and the lower dies are always kept at a preset temperature through heat preservation treatment on the replaced lower dies, so that reheating time is saved after the rubber product is replaced, production efficiency is improved, energy consumption is reduced, and cost is reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a top view of the upper structure of the hidden body according to the present utility model.

Fig. 3 is an exploded view of the body and injection assembly of the present utility model.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a top view of the machine body and the mold changing device of the present utility model.

Fig. 6 is a schematic diagram of the overall structure of the mold changing device in the present utility model.

FIG. 7 is a schematic cross-sectional view of a mold changing device according to the present utility model.

Fig. 8 is a schematic side view of a mold changing device according to the present utility model.

In the figure: 1. a body; 11. a lifting seat; 12. a hydraulic cylinder; 13. a slip cylinder; 131. a mounting block; 132. pulling blocks; 1321. a plug-in groove; 14. a charging barrel; 141. pushing oil cylinder; 142. a pushing block; 143. a material conveying pipe; 15. a syringe; 151. a screw; 152. an injection motor; 153. a discharge port; 154. a check valve; 16. a material conveying channel; 2. an upper die; 21. an upper electric heating plate; 3. a lower die; 31. a plug block; 32. a lower electric heating plate; 4. a die changing device; 41. a base; 42. changing a die holder; 421. a slideway; 422. a roller; 423. a limit cylinder; 43. a moving cylinder; 45. a heat-preserving cylinder; 451. an electric insulation board; 452. a connecting block; 453. a mounting rod; 46. a rack.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model discloses a double-lower-die forming production device, which is shown in figures 1-8, and comprises a vulcanizing machine body 1, wherein an upper die 2 and a lower die 3 are arranged on the machine body 1, the lower die 3 is positioned right below the upper die 2, a lifting seat 11 is arranged on the machine body 1, the lifting seat 11 is connected with the machine body 1 in a sliding manner, the lifting seat 11 slides on the machine body 1 along the vertical direction, and the lower die 3 is positioned on the upper surface of the lifting seat 11. The machine body 1 is provided with a driving part for driving the lifting seat 11 to move towards or away from the upper die 2, specifically, the driving part comprises a hydraulic cylinder 12 fixedly installed on the machine body 1 along the vertical direction, a piston rod of the hydraulic cylinder 12 is fixedly connected to the lower surface of the lifting seat 11, and when the piston rod of the hydraulic cylinder 12 stretches, the hydraulic cylinder 12 drives the lifting seat 11 to ascend, so that the lower die 3 and the upper die 2 are clamped.

Referring to fig. 3 and 4, an injection assembly for injecting rubber compound between the lower mold 3 and the upper mold 2 is provided on the machine body 1, specifically, the injection assembly comprises a charging barrel 14 fixedly installed on the machine body 1 along a vertical direction, a charging barrel 15 fixedly installed on the machine body 1 along a horizontal direction, and a screw 151 coaxially arranged in the charging barrel 15, a charging port is provided on a side wall of the charging barrel 14 for charging the charging barrel 14, a pushing cylinder 141 is fixedly arranged at a bottom end of the charging barrel 14, the pushing cylinder 141 and the charging barrel 14 are coaxially arranged, a piston rod of the pushing cylinder 141 movably penetrates through an end face of the charging barrel 14 to extend into the charging barrel 14, a pushing block 142 is fixedly installed at a piston rod end of the pushing cylinder 141, and the pushing block 142 is in sealing fit with an inner wall of the charging barrel 14. A material conveying pipe 143 is communicated between the material cylinder 14 and the injection cylinder 15, one end of the material conveying pipe 143 is connected with one end of the material cylinder 14 far away from the material pushing oil cylinder 141, and the other end of the material conveying pipe 143 is connected with the side wall of the injection cylinder 15; when the piston rod of the pushing cylinder 141 is extended, the pushing block 142 pushes the rubber compound in the barrel 14 into the injection barrel 15 through the feed conveying pipe 143.

Referring to fig. 3 and 4, an injection motor 152 is fixedly installed at one end of the injection cylinder 15, the injection motor 152 is coaxially arranged with the injection cylinder 15, an output shaft of the injection motor 152 extends into the injection cylinder 15 and is fixedly connected with a screw 151 coaxially, a discharge port 153 is formed at the other end of the injection cylinder 15, when the injection motor 152 works, the injection motor 152 drives the screw 151 to rotate, the screw 151 drives rubber compound to move in the injection cylinder 15 and flow out through the discharge port 153, and meanwhile, in order to prevent the rubber compound from flowing back, a check valve 154 is installed on the discharge port 153.

Referring to fig. 3 and 4, a part of the injection cylinder 15 extends into the machine body 1, a material conveying channel 16 is arranged on the machine body 1 along the vertical direction, the material conveying channel 16 extends to the lower surface of the upper die 2, when the hydraulic cylinder 12 drives the lower die 3 to be matched with the upper die 2, the material pushing cylinder 141 pushes rubber material into the injection cylinder 15, and then the injection motor 152 is operated to drive the screw 151 to rotate so as to drive the rubber material to be injected between the upper die 2 and the lower die 3 through the material conveying channel 16.

Referring to fig. 1 and 3, simultaneously, a lower electric heating plate 32 is fixedly installed on the elevation seat 11, and a lower mold 3 is attached to the upper surface of the lower electric heating plate 32; an upper electric heating plate 21 is fixedly arranged on the machine body 1, the upper die 2 is attached to the lower surface of the upper electric heating plate 21, when the hydraulic cylinder 12 drives the lower die 3 to be matched with the upper die 2, the hydraulic cylinder 12 pressurizes the space between the lower die 3 and the upper die 2 after the injection motor 152 injects rubber sizing material between the lower die 3 and the upper die 2, and the lower electric heating plate 32 and the upper electric heating plate 21 heat the lower die 3 and the upper die 2, so that the rubber sizing material between the lower die 3 and the upper die 2 is vulcanized. After the vulcanization is completed, the hydraulic cylinder 12 is retracted to separate the lower die 3 from the upper die 2, the rubber product obtained by vulcanization is positioned on the lower die 3, and an operator takes down the rubber product on the lower die 3.

Referring to fig. 1 and 7, in addition, the double lower die forming production device further includes a die changing device 4, specifically, the die changing device 4 includes a base 41 and a die changing seat 42 disposed on the base 41, the base 41 is located at one side of the vulcanizing machine body 1, the die changing seat 42 is in a u shape, two sets of slide ways 421 for placing the lower die 3 are disposed in the die changing seat 42 along a vertical direction at intervals, the slide ways 421 are disposed along a horizontal direction, the slide ways 421 include two parallel slide grooves disposed on two opposite side walls of the die changing seat 42, two ends of the slide grooves are disposed in a penetrating manner, and two opposite sides of the lower die 3 are in sliding fit with the two slide grooves of the slide ways 421. One group of slide ways 421 are leveled with the lower die 3 on the lifting seat 11, and the lower die 3 is in sliding fit with the lower electric heating plate 32, so that the lower die 3 on the lifting seat 11 can be moved onto the slide ways 421 in the die changing seat 42.

Referring to fig. 2 and 7, a sliding component for driving the lower die 3 to horizontally move between the die changing seat 42 and the lifting seat 11 is disposed on the lifting seat 11, specifically, the sliding component includes a sliding cylinder 13 fixedly mounted on the lifting seat 11 along a horizontal direction, a mounting block 131 fixedly mounted on a piston rod of the sliding cylinder 13, two pull blocks 132 fixedly mounted on the mounting block 131, the sliding cylinder 13 is disposed in parallel along a length direction of the slide 421, the piston rod of the sliding cylinder 13 is located above the lower electric heating plate 32, two plug blocks 31 are fixedly mounted on one side edge of the lower die 3 close to the sliding cylinder 13, the cross section of the plug blocks 31 is in a T-shaped configuration, a plug groove 1321 is formed in the pull block 132, the plug groove 1321 is in a T-shaped configuration, the plug groove 1321 penetrates through the upper surface and the lower surface of the pull block 132 and faces the surface of the plug block 31, the plug block 31 is in plug fit with the plug groove 1321, the plug block 31 is protruded out of the piston rod of the sliding cylinder 13 after the plug groove 1321, the plug block 31 is driven to move into the die changing seat 42, and two side edges of the lower die 3 slide 421 are prevented from falling down on the slide 421.

Referring to fig. 6 and 7, in addition, a lower mold 3 for replacement is slidably disposed on a set of slide ways 421, a moving member for driving the mold changing seat 42 to move along a vertical direction is disposed on the base 41, specifically, the moving member includes a moving cylinder 43 fixedly mounted on the base 41 along the vertical direction, a piston rod of the moving cylinder 43 is fixedly connected to the mold changing seat 42, meanwhile, a plurality of guide posts are vertically and fixedly mounted on the mold changing seat 42, the guide posts movably penetrate through the base 41, when the piston rod of the moving cylinder 43 stretches out or retracts, thereby driving the mold changing seat 42 to lift, when the mold changing seat 42 lifts, when the free set of slide ways 421 is aligned with the lower mold seat on the lifting seat 11, the sliding cylinder 13 drives the lower mold 3 on the lifting seat 11 to go into the mold changing seat 42, then the moving cylinder 43 drives the mold changing seat 42 to lift, so that the plug-in block 31 on the lower mold changing seat 3 is separated from the pull block 132, and another lower mold 3 for replacement placed in advance on the mold changing seat 42 is moved to the position of the pull block 132, so that the plug-in block 31 on the new lower mold 3 is plugged onto the pull block 132, and then the free lower mold 3 is slid to lift, when the free set of slide ways 421 is aligned with the lower mold 3 on the lower mold for replacement seat 11.

Referring to fig. 7 and 8, in addition, two racks 46 are fixedly installed on one side of the die-changing holder 42, the racks 46 are arranged in the vertical direction, two driving motors are fixedly installed on the base 41 in the horizontal direction, gears are coaxially and fixedly installed on output shafts of the driving motors, and the two gears are respectively meshed with the two racks 46. The driving motor works to drive the gear to rotate, the gear drives the rack 46 to move up and down so as to drive the die changing seat 42 to lift, thus the acting force of driving the die changing seat 42 can be increased, the lifting stability is improved, meanwhile, the moving distance of the die changing seat 42 can be controlled more accurately due to better control of the rotation number of the driving motor rotor, and the slideway 421 in the die changing seat 42 can be driven more accurately to be aligned with the lifting seat 11.

Referring to fig. 5 and 7, in addition, in order to reduce the friction force of the lower mold 3 sliding on the slide 421, a plurality of rollers 422 are rotatably installed on the die changing holder 42 in the horizontal direction, the rollers 422 are located at the slide 421, the plurality of rollers 422 are arranged at intervals along the length direction of the slide 421, the rollers 422 are located below the lower mold 3, and the top of the rollers 422 is slightly higher than the bottom of the slide 421, so that the rollers 422 are in rolling fit with the lower mold 3. Meanwhile, in order to enable the lower die 3 to completely enter the die changing seat 42, sliding of the lower die 3 is prevented, two opposite outer sides of the die changing seat 42 are horizontally and fixedly provided with limiting cylinders 423, the number of the limiting cylinders 423 is four, the positions of the four limiting cylinders 423 correspond to four sliding grooves of two groups of sliding ways 421, a piston rod of the limiting cylinder 423 is fixedly provided with a limiting block, the limiting block movably penetrates through the side wall of the die changing seat 42 to extend into the die changing seat 42, limiting holes are formed in two opposite side edges of the lower die 3, the limiting block is matched with the limiting holes in an inserting mode, after the lower die 3 enters the die changing seat 42 in place, piston rods of the limiting cylinders 423 extend, and the limiting block is inserted into the limiting holes in the side edges of the lower die 3, so that the lower die 3 cannot slide easily.

Referring to fig. 6 and 7, in addition, in order to keep the temperature of the lower mold 3 after the lower mold 3 enters the mold changing seat, a thermal insulation cylinder 45 is fixedly installed on the base 41 along the vertical direction, the thermal insulation cylinder 45 is located under the mold changing seat 42, a connecting block 452 is fixedly installed on a piston rod of the thermal insulation cylinder 45, three installation rods 453 are fixedly installed on the connecting block 452, the installation rods 453 are vertically arranged, the top ends of the installation rods 453 movably penetrate through the lower surface of the mold changing seat 42 to extend into the mold changing seat 42, an electric insulation plate 451 is fixedly installed on the top ends of the three installation rods 453, the electric insulation plate 451 is horizontally arranged, after the lower mold 3 enters the mold changing seat 42, a piston rod of the thermal insulation cylinder 45 extends, and the electric insulation plate 451 is driven to be attached to the lower surface of the lower mold 3, so that the lower mold 3 is insulated, the lower mold 3 in the mold changing seat 42 can be kept at a high temperature all the time, when the lifting seat 11 is replaced again, the reheating time can be saved, and the production efficiency is improved; when the lower mold 3 slides into the group of slide ways 421 located below, the piston rod of the heat-insulating air cylinder 45 is retracted first, and after the lower mold 3 slides into the slide ways 421 located below, the piston rod of the heat-insulating air cylinder 45 is extended again, so as to drive the electric heat-insulating plate 451 to be attached to the surface of the lower mold 3.

The implementation principle of the utility model is as follows: the piston rod of the hydraulic cylinder 12 stretches out to drive the lifting seat 11 to move upwards so as to lead the lower die 3 to be matched with the upper die 2; the piston rod of the pushing cylinder 141 extends out to drive rubber sizing material to enter the injection cylinder 15 through the material conveying pipe 143, the injection motor 152 works to drive the screw 151 to rotate, the rubber sizing material is injected between the upper die 2 and the lower die 3 from the injection cylinder 15 through the material conveying channel 16, the upper electric heating plate 21 and the lower electric heating plate 32 heat the upper die 2 and the lower die 3 to a preset temperature in advance, the hydraulic cylinder 12 pressurizes the lower die 3, the pressure required by vulcanization is achieved between the upper die 2 and the lower die 3, and the rubber sizing material is vulcanized at high temperature and high pressure to obtain a rubber product; the piston rod of the hydraulic cylinder 12 is retracted to drive the lifting seat 11 to move downwards so as to enable the lower die 3 to be separated from the upper die 2, the rubber product is located on the upper surface of the lower die 3 under the action of gravity, when the lower die 3 with the rubber product moves to be leveled with the idle slide rail 421 of the die changing seat 42, the piston rod of the sliding cylinder 13 stretches out to drive the lower die 3 with the rubber product to move to the idle slide rail 421 of the die changing seat 42, and when the lower die 3 with the rubber product enters the die changing seat 42 to be in place, the limiting cylinder 423 drives the limiting block to be inserted into the limiting hole on the side edge of the lower die 3 so as to fix the lower die 3. The movable cylinder 43 drives the die changing seat 42 to lift, the lower die 3 which is placed in advance on the die changing seat 42 and used for replacement moves towards the upper surface of the upper electric heating plate 21, the inserting block 31 on the lower die 3 with rubber products is separated from the pulling block 132 on the sliding cylinder 13 in the lifting process, when the lower surface of the lower die 3 which is used for replacement moves to be in a state of being held with the upper surface of the upper electric heating plate 21, the inserting block 31 on the lower die 3 which is used for replacement is synchronously inserted into the inserting groove 1321 on the pulling block, then the piston rod of the sliding cylinder 13 is retracted, the lower die 3 which is used for replacement moves to the upper electric heating plate 21, the piston rod of the heat preservation cylinder 45 extends out, the electric heat preservation plate 451 is driven to move upwards to be attached to the lower surface of the lower die 3 with rubber products, and the lower die 3 with rubber products is preserved, so that the replacement between the two lower dies 3 is completed; the operator takes down the rubber product on the lower mold 3 with the rubber product, and repeats the above production steps after the upper mold 2 and the lower mold 3 on the vulcanizer body 1 are vulcanized again with the rubber product. The two lower dies 3 are continuously replaced in a circulating way, so that the lower electric heating plate 32, the upper die 2 and the upper electric heating plate 21 are always in a working state, the situation that the lower electric heating plate 32, the upper die 2 and the upper electric heating plate 21 are in an idle state when an operator takes rubber products is avoided, heat is dissipated, and the lower dies are always kept at a preset temperature through heat preservation treatment on the replaced lower dies, so that reheating time is saved after the rubber products are replaced into a machine body, the production efficiency is improved, energy waste is greatly reduced, and the cost is reduced.

The present utility model is not limited to the preferred embodiments, but is intended to be limited to the following description, and any modifications, equivalent changes and variations in light of the above-described embodiments will be apparent to those skilled in the art without departing from the scope of the present utility model.

Claims (7)

1. A pair of lower mould shaping production facility which characterized in that: the vulcanizing machine comprises a vulcanizing machine body (1) and a die changing device (4), wherein an upper die (2) and a lower die (3) are arranged on the vulcanizing machine body (1), a lifting seat (11) is arranged on the vulcanizing machine body (1), the lifting seat (11) is connected with the vulcanizing machine body (1) in a sliding manner, the lower die (3) is arranged on the upper surface of the lifting seat (11), and a driving piece for driving the lifting seat (11) to move towards or away from the upper die (2) is arranged on the vulcanizing machine body (1);

the die changing device (4) comprises a base (41) and a die changing seat (42) arranged on the base (41), two groups of slide ways (421) used for placing the lower die (3) are arranged on the die changing seat (42) at intervals, the lower die (3) is matched with the slide ways (421) in a sliding mode, a group of lower die (3) used for replacement are arranged on the slide ways (421), a sliding component used for driving the lower die (3) to move between the die changing seat (42) and the lifting seat (11) is arranged on the lifting seat (11), and a moving part used for driving the die changing seat (42) to move along the arrangement direction of the two groups of slide ways (421) is arranged on the base (41).

2. The double lower die forming production device according to claim 1, wherein: the driving piece comprises a hydraulic cylinder (12) vertically arranged on the machine body (1), and a piston rod of the hydraulic cylinder (12) is fixedly connected with the lifting seat (11).

3. The double lower die forming production device according to claim 1, wherein: the sliding assembly comprises a sliding cylinder (13) horizontally arranged on the lifting seat (11), a mounting block (131) arranged on a piston rod of the sliding cylinder (13), two pulling blocks (132) arranged on the mounting block (131), two inserting blocks (31) arranged on one side edge of the lower die (3), wherein the cross section of each inserting block (31) is T-shaped, inserting grooves (1321) are formed in the pulling blocks (132), the inserting grooves (1321) are T-shaped, the inserting blocks (31) are matched with the inserting grooves (1321) in an inserting mode, and when the lower die (3) is replaced, the moving piece drives the lower die (3) to move to the inserting blocks (31) to be inserted in the inserting grooves (1321).

4. The double lower die forming production device according to claim 1, wherein: the movable part comprises a movable air cylinder (43) vertically arranged on the base (41), a piston rod of the movable air cylinder (43) is fixedly connected with the die changing seat (42), a plurality of guide posts are vertically arranged on the die changing seat (42), and the guide posts movably penetrate through the base (41).

5. The double lower die forming production device according to claim 1, wherein: the die changing seat (42) is provided with a roller (422), the roller (422) is located at the slide way (421), the roller (422) is located below the lower die (3), and the roller (422) is in rolling fit with the lower die (3).

6. The double lower die forming production device according to claim 1, wherein: two opposite outer side surfaces of the die changing seat (42) are horizontally provided with limiting cylinders (423), piston rods of the limiting cylinders (423) are provided with limiting blocks, the limiting blocks movably penetrate through the side walls of the die changing seat (42) and extend into the die changing seat (42), two opposite side edges of the lower die (3) are provided with limiting holes, and the limiting blocks are in plug-in fit with the limiting holes.

7. The double lower die forming production device according to claim 4, wherein: an electric heat-insulating plate (451) is arranged in the die changing seat (42), a heat-insulating cylinder (45) is arranged on the base (41), a piston rod of the heat-insulating cylinder (45) is connected to the electric heat-insulating plate (451), and the piston rod of the heat-insulating cylinder (45) stretches to drive the electric heat-insulating plate (451) to be attached to the lower surface of the lower die (3).

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