CN118219535B - Thermal forming machine - Google Patents

Abstract

The invention belongs to the technical field of plastic packaging box production equipment, and particularly relates to a thermoforming machine, which comprises a box body, wherein a thermoforming module is arranged in the box body, the thermoforming module comprises a mounting table and a thermoforming mould, the thermoforming mould comprises a lifting sliding frame, an upper mould table and a lower mould table, the upper mould table is fixedly arranged at the upper end of the lifting sliding frame, the lower mould table is slidably arranged with the lifting sliding frame, the upper mould table is provided with an upper mould, the lower mould table is provided with a lower mould, the lower mould is provided with a forming cavity, the lower mould is provided with a circular cutting edge, the upper mould is provided with a pressing mould table, the mounting table is provided with a mould opening and closing mechanism, the mould opening and closing mechanism is provided with an energy storage assembly, and the energy storage assembly provides assistance during mould opening and simultaneously buffers during mould closing; according to the invention, the energy storage component is arranged in the die opening and closing mechanism, so that auxiliary power is provided in the process that the lower die is upwards clamped with the upper die; in the device die sinking reset process, a buffer force is provided, so that the lower die table is more stable when the lower die table moves downwards to die.

Description

Thermal forming machine

Technical Field

The invention belongs to the technical field of plastic packaging box production equipment, and particularly relates to a thermoforming machine.

Background

Food packaging is carried out in various modes, namely, sealing packaging is carried out by adopting a soft plastic bag, the packaging is mainly applied to packaging of instant noodles, liquid beverages, packaging of some foods and the like, packaging is carried out by utilizing a plastic box, the packaging is mainly applied to packaging of cooked foods or packaging of some fragile or easily-deformed foods, and the packaging is more attractive compared with the packaging of soft plastic bags by utilizing the plastic box.

In the prior art, the plastic packaging box is produced in a hot-press molding mode, after a plastic sheet is softened, the plastic sheet is clamped by a hot-press mold for hot-press molding, the structure of the existing hot-press mold is relatively simple, the existing hot-press mold consists of a fixed upper mold, a movable lower mold and a lifting structure for lifting the lower mold, when the plastic sheet is clamped, the lower mold is independently pushed by the lifting structure, the load is large, and when the plastic sheet is opened, the lower mold cannot be reset and buffered, so that the hot-press molding machine is provided.

Disclosure of Invention

The purpose of the invention is that: aims to provide a thermoforming machine which is used for solving the problems in the background technology.

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

The thermoforming machine comprises a box body, wherein a thermoforming module is arranged on the front side inside the box body, the thermoforming module comprises a mounting table and a thermoforming die, the mounting table is fixed at the bottom of the box body, the thermoforming die comprises a lifting sliding frame, an upper die table and a lower die table, the lifting sliding frame is fixedly arranged on the upper side of the mounting table, the upper die table is fixedly arranged at the upper end of the lifting sliding frame, and the lower die table and the lifting sliding frame are slidably arranged and are positioned under the upper die table;

An upper die is arranged at the bottom of the upper die table, a lower die corresponding to the upper die is arranged at the top of the lower die table, a plurality of forming cavities are formed at the top of the lower die, a plurality of annular cutting edges which are respectively positioned outside the forming cavities and are concentrically arranged are also arranged at the top of the lower die, a plurality of die tables corresponding to the forming cavities are arranged on the upper die, and the tops of the die tables are connected with a mounting plate together;

The hydraulic lifting rod is installed at the top of the box body, the movable end of the hydraulic lifting rod penetrates through the top of the box body and is fixedly connected with the mounting plate, the mounting table is further provided with a die opening and closing mechanism corresponding to the lower die, and the die opening and closing mechanism is further provided with an energy storage component which can provide power assistance during die assembly and buffer during die opening.

The die opening and closing mechanism comprises a first electric telescopic rod, the first electric telescopic rod is installed at the top of the installation table, and the movable end of the first electric telescopic rod is fixedly connected with the bottom of the lower die.

The energy storage assembly comprises two buffering power-assisted cylinders and an energy storage tank, the energy storage tank is fixedly arranged on the mounting table, the two buffering power-assisted cylinders are arranged on the top of the mounting table, and movable ends of the two buffering power-assisted cylinders are respectively fixedly connected with two sides of the lower die table;

The energy storage tank comprises an air inlet port and two connecting air pipes, the tank body is internally provided with an air supply tank, the air inlet port is connected with a pipeline between the air supply tanks, the air inlet port is provided with a first one-way valve, the two air inlet ends at the bottom of the buffering power-assisted air cylinder are respectively communicated with the energy storage tank through the two connecting air pipes, and the energy storage tank is further provided with a pressure transmitter.

The lower die is internally provided with a plurality of cooling chambers communicated with the forming cavity, the rear side of the mounting table is provided with a cooling mechanism, the cooling mechanism comprises a water return tank, a water storage tank and a heat exchange tank, the water return tank is positioned right above the water storage tank, the heat exchange tank is positioned between the water return tank and the water storage tank, a plurality of water return pipes are respectively connected between the bottom of each cooling chamber and the front side of the water return tank, a plurality of water inlet pipes are respectively connected between the rear side of each cooling chamber and the front side of the water storage tank, and each water inlet pipe is provided with a second one-way valve;

the upper side of the heat exchange box is connected with a pipeline at the rear side of the water return box, and the lower side of the heat exchange box is connected with a pipeline at the rear side of the water storage tank;

The horizontal height of the water return tank is not higher than the lowest horizontal height of the lower die after the lower die is opened, and the water storage tank and the water return tank are jointly provided with a circulating mechanism.

The circulating mechanism comprises a driving assembly and two sliding tables, the two sliding tables are respectively and slidably arranged in the water return tank and the water storage tank, the two sliding tables are fixedly connected with a plurality of sliding rods, each sliding rod respectively and slidably penetrates through the rear side of the water return tank and the rear side of the water storage tank, the rear ends of the sliding rods which correspond up and down are commonly connected with connecting tables, each connecting table is commonly connected with a longitudinally extending guide rod, the driving assembly comprises two connecting frames and two inclined guide rails, the two inclined guide rails are respectively and fixedly connected with two sides of the lower die table through the two connecting frames, the higher sides of the inclined guide rails are arranged forwards, the lower sides of the inclined guide rails are arranged backwards, and the two ends of the guide rods are respectively inserted into the inclined guide rails at the two sides;

When the lower die is at the lowest level after die opening, the connecting frame and the inclined guide rail are at the lowest position, and the guide rod is positioned at the higher side of the inclined guide rail, so that the two sliding tables are respectively abutted to the backwater tank and the inner wall of the front side of the water storage tank.

The heat exchange box is provided with a plurality of U-shaped heat exchange copper pipes which are sequentially arranged from top to bottom, each of two ports of the U-shaped heat exchange copper pipes is provided with a connector, the box body is also internally provided with a cooling oil tank, and the connectors are connected with the U-shaped heat exchange copper pipes and the cooling oil tank.

The box front side still is provided with the blowing platform, the blowing platform is provided with feeding mechanism, feeding mechanism is including a plurality of horizontal telescopic arms and second electric telescopic handle, the mounting disc is installed to the expansion end of second electric telescopic handle, and is individual horizontal telescopic arm with the mounting disc is installed fixedly, horizontal telescopic arm's expansion end fixedly connected with to the horizontal pole that the box extends, a plurality of sucking disc subassemblies are installed to the horizontal pole rear side.

The fixed end of the transverse telescopic arm is fixedly provided with a loop bar sleeved with the cross bar, a transverse air passage extending transversely is formed in the cross bar, a hollow tube is arranged on the front side of the loop bar, an opening is formed in the upper side of the hollow tube, a first air hole corresponding to the hollow tube is formed in the front end of the transverse air passage, the discharging platform is further provided with a mounting frame, the mounting frame is fixedly connected with a plurality of sleeves sleeved with the outer wall of the hollow tube respectively, and a second air hole is formed in the lower side of the sleeve;

The sucker assembly comprises a connecting pipe and a sucker, the connecting pipe is communicated with the transverse air passage, the sucker is communicated with the connecting pipe, and a plurality of third check valves communicated with the transverse air passage are further arranged on the cross rod.

In the process of device die assembly, the energy storage component is arranged in the die opening and closing mechanism, so that auxiliary power is provided by utilizing high-pressure gas energy release in the process of die assembly of the lower die and the upper die; in the device die opening resetting process, the lower die table moves downwards to open the die more stably through the buffer force of high-pressure gas.

Drawings

The invention may be further illustrated by means of non-limiting examples given in the accompanying drawings.

FIG. 1 is a schematic diagram of the overall structure of a first embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating an internal structure of a first embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of a partial cross-sectional structure of a first embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the cross-sectional structure at B in FIG. 4;

FIG. 6 is an enlarged schematic view of the cross-sectional structure at C of FIG. 4;

FIG. 7 is a schematic cross-sectional view of a heat exchange box according to a first embodiment of the present invention;

FIG. 8 is a schematic diagram of a second embodiment of the present invention;

FIG. 9 is a schematic diagram of a partial cross-sectional structure of a second embodiment of the present invention;

FIG. 10 is an enlarged schematic view of the cross-sectional structure at D of FIG. 9;

FIG. 11 is an enlarged schematic view of the cross-sectional structure at E of FIG. 9;

the main reference numerals are as follows:

The box body 000, the hydraulic lifting rod 001, the mounting table 100, the lifting carriage 110, the upper die table 120, the upper die 121, the die pressing table 122, the mounting plate 123, the lower die table 130, the lower die 131, the forming cavity 132, the annular cutting blade 133, the first electric telescopic rod 140, the buffer booster cylinder 141, the energy storage tank 142, the air inlet port 1421, the connecting air pipe 1422, the first check valve 1423, the cooling chamber 150, the water return tank 151, the water storage tank 152, the heat exchange tank 153, the U-shaped heat exchange copper pipe 1531, the joint 1532, the water return pipe 154, the water inlet pipe 155, the second check valve 1551, the sliding table 160, the sliding bar 161, the connecting table 162, the guide rod 163, the connecting frame 164, the diagonal guide rail 165;

the device comprises a discharging platform 200, a transverse telescopic arm 210, a cross rod 211, a sleeve rod 212, a transverse air passage 213, a hollow tube 214, a third one-way valve 215, a second electric telescopic rod 220, a mounting plate 221, a mounting frame 230, a sleeve 231, a connecting tube 240 and a sucker 241.

Detailed Description

In order that those skilled in the art will better understand the present invention, the following technical scheme of the present invention will be further described with reference to the accompanying drawings and examples.

Embodiment 1, as shown in fig. 1 to 7, a thermoforming machine comprises a box 000, wherein a thermoforming module is arranged at the front side inside the box 000, the thermoforming module comprises a mounting table 100 fixed at the bottom of the box 000 and a thermoforming mold, the thermoforming mold comprises a lifting carriage 110, an upper mold table 120 and a lower mold table 130, the lifting carriage 110 is fixedly arranged at the upper side of the mounting table 100, the upper mold table 120 is fixedly arranged at the upper end of the lifting carriage 110, and the lower mold table 130 is slidably arranged with the lifting carriage 110 and is positioned right below the upper mold table 120;

The bottom of the upper die table 120 is provided with an upper die 121, the top of the lower die table 130 is provided with a lower die 131 corresponding to the upper die 121, the top of the lower die 131 is provided with a plurality of forming cavities 132, the top of the lower die 131 is also provided with a plurality of annular cutting edges 133 which are respectively positioned outside the forming cavities 132 and are concentrically arranged, the upper die 121 is provided with a plurality of die tables 122 respectively corresponding to the forming cavities 132, and the tops of the die tables 122 are commonly connected with a mounting plate 123;

The hydraulic lifting rod 001 is installed at the top of the box body 000, the movable end of the hydraulic lifting rod 001 penetrates through the top of the box body 000 and is fixedly connected with the mounting plate 123, the mounting table 100 is further provided with a die opening and closing mechanism corresponding to the lower die 131, the die opening and closing mechanism is further provided with an energy storage component, and the energy storage component can provide power assistance during die assembly and buffer during die opening.

The mounting table 100 is used for mounting a lifting carriage 110;

the upper die table 120 is fixed on the top of the lifting carriage 110 for mounting the upper die 121;

the lower die table 130 is slidably arranged with the lifting sliding table 110 and is positioned below the upper die table 120 for installing the lower die 131;

the use process comprises the following steps:

① Feeding: a plastic sheet is introduced from the rear side of the case 000 by a feeding device (not shown), softened through the inside of the case 000, and then fed between the upper die 121 and the lower die 131 of the thermoforming module at the front side of the case 000;

② And (3) die assembly: the lower die table 130 is pushed to drive the lower die 131 to move upwards through the starting of the die opening and closing mechanism, the die opening and closing mechanism pauses after the die is closed with the upper die 121 of the upper die table 120, and the softened plastic sheet is cut into a required shape by the annular cutting edge 133 after the die is closed due to the annular cutting edge 133 arranged at the top of the lower die 131;

③ And (3) forming: after the softened plastic sheet is cut, the hydraulic lifting rod 001 at the top of the box body 000 moves downwards to push each die pressing table 122 connected with the mounting plate 123 to be pressed downwards and enter the forming cavity 132 of the lower die 131, so that the softened plastic sheet is subjected to hot press forming through the cooperation of the die pressing table 122 and the forming cavity 132 to obtain a packaging box;

④ And (5) die opening and resetting: after the molding is finished, the hydraulic lifting rod 001 moves upwards to reset, the mold opening and closing mechanism is restarted, the lower mold platform 130 is pulled to drive the lower mold 131 to move downwards to reset, and then the mold opening and resetting work can be finished, and in the process, the resetting of the hydraulic lifting rod 001 and the resetting of the mold opening and closing mechanism can be synchronously or successively performed.

In this embodiment, as shown in fig. 1 to 6, the mold opening and closing mechanism further includes a first electric telescopic rod 140, the first electric telescopic rod 140 is mounted on the top of the mounting table 100, and a movable end of the first electric telescopic rod 140 is fixedly connected with the bottom of the lower mold 131;

The energy storage assembly comprises two buffer booster cylinders 141 and an energy storage tank 142, the energy storage tank 142 is fixedly arranged on the mounting table 100, the two buffer booster cylinders 141 are arranged on the top of the mounting table 100, and the movable ends of the two buffer booster cylinders 141 are respectively fixedly connected with the two sides of the lower die table 130;

The energy storage tank 142 includes an air inlet port 1421 and two connecting air pipes 1422, the tank body 000 is further provided with an air supply tank (not shown in the figure), the air inlet port 1421 is connected with the air supply tank through a pipeline, the air inlet port 1421 is provided with a first check valve 1423, the air inlet ends at the bottoms of the two buffer booster cylinders 141 are respectively communicated with the energy storage tank 142 through the two connecting air pipes 1422, and the energy storage tank 142 is further provided with a pressure transmitter (not shown in the figure).

Before use, the device is in a die opening state, namely the lower die table 130 is pulled to be at the lowest position through the first electric telescopic rod 140 of the die opening and closing mechanism, the air supply tank arranged in the box body 000 is filled with air into the energy storage tank 142 through the air inlet port 1421, so that the internal pressure of the energy storage tank 142 is increased, the internal pressure of the energy storage gas is increased, the internal pressure of the energy storage tank 142 is monitored through the pressure transmitter, and the air backflow can be avoided through the first one-way valve 1423 arranged on the air inlet port 1421;

Because the lower die table 130 is in a stable state by pulling the first electric telescopic rod 140, and because the movable end of the buffer booster cylinder 141 is fixed with the lower die table 130, when the high-pressure gas is filled in the energy storage tank 142, the movable end of the buffer booster cylinder 141 cannot extend out due to the high-pressure gas filled in the energy storage tank 142;

in the process of device die assembly, the first electric telescopic rod 140 starts to extend to push the lower die table 130 to drive the lower die 131 to move upwards to die with the upper die 121 of the upper die table 120, and in the process, the movable end of the buffer booster cylinder 141 extends synchronously due to the movement of the lower die table 130, so that high-pressure gas stored in the energy storage tank 142 can be released into the buffer booster cylinder 141 through the connecting air pipe 1422, and auxiliary power is provided in the process of die assembly of the lower die 131 and the upper die 121;

In the device die opening resetting process, the first electric telescopic rod 140 is retracted, the lower die table 130 is pulled to drive the lower die 131 to move downwards for die opening, in the process, gas in the buffer power assisting cylinder 141 reenters the energy storage tank 142 through the connecting gas pipe 1422, and the buffer force of high-pressure gas is used for enabling the lower die table 130 to move downwards for die opening to be more stable.

As a further improvement of the embodiment, as shown in fig. 2, 4, 6 and 7, a plurality of cooling chambers 150 communicated with the molding cavity 132 are further formed in the lower die 131, a cooling mechanism is mounted at the rear side of the mounting table 100, the cooling mechanism comprises a water return tank 151, a water storage tank 152 and a heat exchange tank 153, the water return tank 151 is positioned right above the water storage tank 152, the heat exchange tank 153 is positioned between the water return tank 151 and the water storage tank 152, a plurality of water return pipes 154 are respectively connected between the bottom of each cooling chamber 150 and the front side of the water return tank 151, a plurality of water inlet pipes 155 are respectively connected between the rear side of each cooling chamber 150 and the front side of the water storage tank 152, and each water inlet pipe 155 is provided with a second one-way valve 1551;

The upper side of the heat exchange box 153 is connected with a pipeline at the rear side of the water return box 151, and the lower side of the heat exchange box 153 is connected with a pipeline at the rear side of the water storage tank 152;

The horizontal height of the water return tank 151 is not higher than the lowest horizontal height of the lower die 131 after being opened, the water storage tank 152 and the water return tank 151 are jointly provided with a circulation mechanism, the circulation mechanism comprises a driving component and two sliding tables 160, the two sliding tables 160 are respectively arranged in the water return tank 151 and the water storage tank 152 in a sliding mode, the two sliding tables 160 are fixedly connected with a plurality of sliding rods 161, each sliding rod 161 respectively penetrates through the rear side of the water return tank 151 and the rear side of the water storage tank 152 in a sliding mode, the rear ends of the upper sliding rods 161 and the lower sliding rods 161 are jointly connected with connecting tables 162, each connecting table 162 is jointly connected with a longitudinally extending guide rod 163, the driving component comprises two connecting frames 164 and two inclined guide rails 165, the two inclined guide rails 165 are respectively fixedly connected with two sides of the lower die table 130 through the two connecting frames 164, the higher sides of the inclined guide rails 165 are arranged forward, the lower sides of the inclined guide rails 163 are arranged backward, and two ends of each guide rod 163 are respectively inserted into the inclined guide rails 165 on two sides;

When the lower die 131 is at the lowest level after die opening, the connecting frame 164 and the inclined guide rail 165 are at the lowest position, and the guide rod 163 is at the higher side of the inclined guide rail 165, so that the two sliding tables 160 are respectively abutted with the inner walls of the front sides of the water return tank 151 and the water storage tank 152.

Since the lower die 131 is at the lowest level after die opening, the connecting frame 164 and the inclined guide rail 165 are at the lowest level, and the guide rod 163 is at the higher side of the inclined guide rail 165, so that the two sliding tables 160 are respectively abutted against the inner walls of the front sides of the water return tank 151 and the water storage tank 152, at this time, as shown in fig. 4 and 6, the two sliding tables 160 respectively seal the water return pipe 154 and the water inlet pipe 155, and at this time, the cooling chamber 150 is filled with cooling water;

After the mold is closed, the upper mold 130 moves upwards through the connecting frame 164, the guide rail 165 is matched with the guide rod 163 through the guide rail 165, the guide rod 163 is positioned at the lower side of the guide rail 165, the connecting table 162 and the sliding rod 161 are pulled, the two sliding tables 160 slide to the rear sides of the water return tank 151 and the water storage tank 152 respectively, the water return pipe 154 and the water inlet pipe 155 are not closed any more, meanwhile, the horizontal height of the water return tank 151 is not higher than the lowest horizontal height after the lower mold 131 is opened, after the mold is closed to the maximum horizontal height by the lower mold 131, the cooling water in the cooling chamber 150 flows back into the water return tank 151 through the water return pipe 154 at the bottom, meanwhile, as the water inlet pipe 155 of the water storage tank 152 is provided with the second one-way valve 1551, cooling water can not directly flow back into the water storage tank 152, after the cooling water flows back into the water return tank 151, as the heat exchange tank 153 is connected between the water return tank 151 and the water storage tank 152 through a pipeline, the cooling water flows back into the water return tank 151 and flows into the heat exchange tank 153 for cooling, and the cooled water can enter the water storage tank 152, so that during mold closing, cooling water can not be filled in the cooling cavity 150, softened plastic sheets in the hot press molding process can not be cooled and hardened, meanwhile, the cooling water is cooled after sequentially passing through the water return tank 151 and the heat exchange tank 153, and finally enters the water storage tank 152 for storage, and the cooling effect of the cooling water is ensured;

in the process of die sinking, the lower die table 130 drives the inclined guide rail 165 downwards again, in the process, the connecting table 162 moves forwards through the cooperation of the inclined guide rail 165 and the guide rod 163, so that the two sliding tables 160 move towards the front side of the water return tank 151 and the front side of the water storage tank 152 respectively, in the process, the interior of the water storage tank 152 is pushed by the sliding tables 160 to enter the cooling cavity 150 through the water inlet pipe 155 and the second one-way valve 1551, and then after die sinking, the cooling cavity 150 can be filled with cooling water to cool the outer wall surface of the forming cavity 132, so that the cooling hardening of the hot-press formed packaging box is accelerated;

Therefore, when the die is continuously closed and opened, the hot-press formed packaging box can be effectively cooled and hardened, and the forming is quickened.

As a supplementary explanation of the heat exchange box in the above improvement, as shown in fig. 7, the heat exchange box 153 is provided with a plurality of U-shaped heat exchange copper pipes 1531 sequentially arranged from top to bottom, two ports of each U-shaped heat exchange copper pipe 1531 are respectively provided with a connector 1532, a cooling oil tank (not shown in the drawing) is also built in the box body 000, and the connectors 1532 connect the U-shaped heat exchange copper pipes 1531 with the cooling oil tank.

The cooling oil tank built-in the box body 000 can continuously introduce heat conduction oil into each U-shaped heat exchange copper pipe 1531, so that cooling water flowing back to the water return tank 151 can fully exchange heat with each U-shaped heat exchange copper pipe 1531 after entering the heat exchange tank 153, the cooling water can be fully cooled, and the cooling effect of the cooling water is guaranteed.

In embodiment 2, on the basis of embodiment 1, a material taking mechanism is designed, specifically as shown in fig. 8 to 11, a material discharging platform 200 is further arranged at the front side of a box 000, the material discharging platform 200 is provided with a material taking mechanism, the material taking mechanism comprises a plurality of transverse telescopic arms 210 and a second electric telescopic rod 220, a mounting plate 221 is mounted at the movable end of the second electric telescopic rod 220, each transverse telescopic arm 210 is fixedly mounted with the mounting plate 221, a cross rod 211 extending towards the box 000 is fixedly connected at the movable end of the transverse telescopic arm 210, and a plurality of sucking disc assemblies are mounted at the rear side of the cross rod 211;

The fixed end of the transverse telescopic arm 210 is fixedly provided with a sleeve rod 212 sleeved with the cross rod 211, a transverse air passage 213 extending transversely is formed in the cross rod 211, a hollow pipe 214 is arranged on the front side of the sleeve rod 212, an opening is formed in the upper side of the hollow pipe 214, a first air hole corresponding to the hollow pipe 214 is formed in the front end of the transverse air passage 213, the discharging platform 200 is further provided with a mounting frame 230, the mounting frame 230 is fixedly connected with a plurality of sleeves 231 sleeved with the outer wall of the hollow pipe 214 respectively, and a second air hole is formed in the lower side of the sleeve 231;

the suction cup assembly comprises a connecting pipe 240 and a suction cup 241, wherein the connecting pipe 240 is communicated with the transverse air passage 213, the suction cup 241 is communicated with the connecting pipe 240, and the cross bar 211 is also provided with a plurality of third check valves 215 communicated with the transverse air passage 213.

As shown in fig. 8-11, the take off mechanism is in the following initial state:

State ①: the second electric telescopic rod 220 pushes each transverse telescopic arm 210 of the mounting plate 221 to be in a high position, the hollow tube 214 of the transverse telescopic arm 210 is completely retracted into the sleeve 231 of the mounting frame 230, and at the moment, the second air hole at the lower side of the sleeve 213 is blocked by the outer wall of the hollow tube 214;

State ②: the movable end of the transverse telescopic arm 210 is shortened to the minimum length, so that the transverse rod 211 is retracted into the sleeve rod 212, and at the moment, the first air hole at the front end of the transverse air channel 213 is correspondingly communicated with the hollow tube 214;

after the device is opened and reset, the material taking mechanism works to take materials, and the method specifically comprises the following steps:

step ①: the movable end of the transverse telescopic arm 210 is extended, so that the cross bar 211 extends out of the sleeve rod 212, and the cross bar 211 is extended between the upper die 121 and the lower die 131, so that the sucking discs 241 at the lower side of the connecting pipes 240 correspond to the forming cavities 132, and at the moment, the first air holes at the front end of the transverse air channels 213 are staggered with the hollow pipes 214 of the sleeve rod 212;

Step ②: the second electric telescopic rod 220 retracts downwards to pull the transverse telescopic arm 210 to move downwards, so that all suction cups 241 at the rear side of the cross rod 211 are driven to abut against the bottom of the inner side of the formed packaging box, after the suction cups 241 are tightly attached to the bottom of the inner side of the packaging box under compression deformation, gas is pressed and discharged through the third one-way valve 215, negative pressure is formed in the transverse air channel 213 to complete the adsorption of the packaging box, meanwhile, the second electric telescopic rod 220 retracts, the hollow tube 214 of the sleeve rod 212 moves downwards relative to the sleeve 231 of the mounting frame 230, the hollow tube 214 does not seal the second air holes at the lower side of the sleeve 231, but the first air holes at the front end of the transverse air channel 213 are staggered with the hollow tube 214 of the sleeve rod 212, so that the inside of the transverse air channel 213 is still in a negative pressure state;

Step ③: after the adsorption of the packaging box is finished, the second electric telescopic rod 220 is reset upwards, the second telescopic rod 220 drives the transverse telescopic arm 210 to reset upwards, the packaging box can be taken out of the forming cavity 132 through the adsorption of the sucking disc 241, the second air hole at the lower side of the sleeve 213 is blocked by the outer wall of the hollow tube 214 again, and then the movable end of the transverse telescopic arm 210 is retracted and reset, so that the cross rod 211 is retracted into the sleeve 212, at the moment, although the first air hole at the front end of the transverse air channel 213 is correspondingly communicated with the hollow tube 214, the second air hole at the lower side of the sleeve 213 is blocked by the outer wall of the hollow tube 214, and the transverse air channel 213 is still in a negative pressure state;

Step ④: the second electric telescopic rod 220 is retracted downwards again, the transverse telescopic arm 210 is pulled to move downwards, so that the hollow pipe 214 does not seal the second air hole at the lower side of the sleeve 231, at the moment, the sleeve 231 is communicated with the air through the second air hole, the hollow pipe 214 is communicated with the transverse air passage 213 through the first air hole, and therefore the transverse air passage 213 is not in a negative pressure state any more, under the action of air pressure, the packing box is separated from the sucking disc 241 and falls on the discharging platform 200, and people can arrange and store the packing box;

Step ⑤: the second electric telescopic rod 220 is retracted upwards, the material taking mechanism returns to the initial state, and the material taking mechanism is filled in the steps ① to ⑤, so that the material taking of the packaging boxes can be completed repeatedly.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.

Claims (4)

1. The utility model provides a thermoforming machine, including the box, the inside front side of box is provided with thermoforming module, its characterized in that: the hot forming module comprises an installing table and a hot forming die, wherein the installing table is fixed at the bottom of the box body, the hot forming die comprises a lifting sliding frame, an upper die table and a lower die table, the lifting sliding frame is fixedly arranged on the upper side of the installing table, the upper die table is fixedly arranged at the upper end of the lifting sliding frame, and the lower die table is slidably arranged with the lifting sliding frame and is positioned under the upper die table;

The upper die is arranged at the bottom of the upper die table, a lower die corresponding to the upper die is arranged at the top of the lower die table, a plurality of forming cavities are formed at the top of the lower die, a plurality of annular cutting edges which are respectively positioned at the outer sides of the forming cavities and are respectively arranged concentrically with the forming cavities are also arranged at the top of the lower die, a plurality of die tables corresponding to the forming cavities are arranged on the upper die, and the tops of the die tables are commonly connected with a mounting plate;

The hydraulic lifting rod is installed at the top of the box body, the movable end of the hydraulic lifting rod penetrates through the top of the box body and is fixedly connected with the mounting plate, the mounting table is further provided with a die opening and closing mechanism corresponding to the lower die, the die opening and closing mechanism is further provided with an energy storage component, and the energy storage component can provide power assistance during die assembly and buffer during die opening;

The die opening and closing mechanism comprises a first electric telescopic rod, the first electric telescopic rod is arranged at the top of the mounting table, and the movable end of the first electric telescopic rod is fixedly connected with the bottom of the lower die;

The energy storage assembly comprises two buffering power-assisted cylinders and an energy storage tank, the energy storage tank is fixedly arranged on the mounting table, the two buffering power-assisted cylinders are arranged on the top of the mounting table, and movable ends of the two buffering power-assisted cylinders are respectively fixedly connected with two sides of the lower die table;

The energy storage tank comprises an air inlet port and two connecting air pipes, the tank body is internally provided with an air supply tank, the air inlet port is connected with the air supply tank through a pipeline, the air inlet port is provided with a first one-way valve, the air inlet ends at the bottoms of the two buffering power-assisted air cylinders are respectively communicated with the energy storage tank through the two connecting air pipes, and the energy storage tank is further provided with a pressure transmitter;

The lower die is internally provided with a plurality of cooling chambers communicated with the forming cavity, the rear side of the mounting table is provided with a cooling mechanism, the cooling mechanism comprises a water return tank, a water storage tank and a heat exchange tank, the water return tank is positioned right above the water storage tank, the heat exchange tank is positioned between the water return tank and the water storage tank, a plurality of water return pipes are respectively connected between the bottom of each cooling chamber and the front side of the water return tank, a plurality of water inlet pipes are respectively connected between the rear side of each cooling chamber and the front side of the water storage tank, and each water inlet pipe is provided with a second one-way valve;

the upper side of the heat exchange box is connected with a pipeline at the rear side of the water return box, and the lower side of the heat exchange box is connected with a pipeline at the rear side of the water storage tank;

The horizontal height of the water return tank is not higher than the lowest horizontal height of the lower die after the lower die is opened, and the water storage tank and the water return tank are jointly provided with a circulating mechanism;

the circulating mechanism comprises a driving assembly and two sliding tables, the two sliding tables are respectively and slidably arranged in the water return tank and the water storage tank, the two sliding tables are fixedly connected with a plurality of sliding rods, each sliding rod respectively and slidably penetrates through the rear side of the water return tank and the rear side of the water storage tank, the rear ends of the sliding rods which correspond up and down are commonly connected with connecting tables, each connecting table is commonly connected with a longitudinally extending guide rod, the driving assembly comprises two connecting frames and two inclined guide rails, the two inclined guide rails are respectively and fixedly connected with two sides of the lower die table through the two connecting frames, the higher sides of the inclined guide rails are arranged forwards, the lower sides of the inclined guide rails are arranged backwards, and the two ends of the guide rods are respectively inserted into the inclined guide rails at the two sides;

When the lower die is at the lowest level after die opening, the connecting frame and the inclined guide rail are at the lowest position, and the guide rod is positioned at the higher side of the inclined guide rail, so that the two sliding tables are respectively abutted to the backwater tank and the inner wall of the front side of the water storage tank.

2. A thermoforming machine as claimed in claim 1, wherein: the heat exchange box is provided with a plurality of U-shaped heat exchange copper pipes which are sequentially arranged from top to bottom, each of two ports of the U-shaped heat exchange copper pipes is provided with a connector, the box body is also internally provided with a cooling oil tank, and the connectors are connected with the U-shaped heat exchange copper pipes and the cooling oil tank.

3. A thermoforming machine as claimed in claim 2, wherein: the box front side still is provided with the blowing platform, the blowing platform is provided with feeding mechanism, feeding mechanism is including a plurality of horizontal telescopic arms and second electric telescopic handle, the mounting disc is installed to the expansion end of second electric telescopic handle, and is individual horizontal telescopic arm with the mounting disc is installed fixedly, horizontal telescopic arm's expansion end fixedly connected with to the horizontal pole that the box extends, a plurality of sucking disc subassemblies are installed to the horizontal pole rear side.

4. A thermoforming machine as claimed in claim 3, wherein: the fixed end of the transverse telescopic arm is fixedly provided with a loop bar sleeved with the cross bar, a transverse air passage extending transversely is formed in the cross bar, a hollow tube is arranged on the front side of the loop bar, an opening is formed in the upper side of the hollow tube, a first air hole corresponding to the hollow tube is formed in the front end of the transverse air passage, the discharging platform is further provided with a mounting frame, the mounting frame is fixedly connected with a plurality of sleeves sleeved with the outer wall of the hollow tube respectively, and a second air hole is formed in the lower side of the sleeve;

The sucker assembly comprises a connecting pipe and a sucker, the connecting pipe is communicated with the transverse air passage, the sucker is communicated with the connecting pipe, and a plurality of third check valves communicated with the transverse air passage are further arranged on the cross rod.