Stamping device for producing aluminum-plastic combined cover

Abstract

The invention relates to the technical field of stamping, in particular to a stamping device for producing an aluminum-plastic combined cover, which comprises a machine body and a die arranged on the machine body, the die comprises an upper die holder and a lower die holder, the lower die holder is fixedly mounted on the machine body, the upper die holder is slidably arranged on the machine body along the vertical direction, and a punch is arranged on the lower end face of the upper die holder. A groove corresponding to the punch is formed in the upper end face of the lower die holder, a driving assembly for driving the upper die holder to reciprocate up and down is further arranged on the machine body, a temperature control assembly for controlling the temperature of the upper die holder within a certain range is arranged in the upper die holder, and a cooling assembly for cooling the temperature of the lower die holder is arranged in the lower die holder. A temperature difference power generation assembly is further arranged between the upper die base and the lower die base. The die has the effect that the temperature of the upper male die and the lower die is kept at a relatively low value during working, so that the production quality of an aluminum cover is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stamping, in particular to a stamping device for producing aluminum-plastic combined covers. BACKGROUND

[0002] The aluminum-plastic combined cover is a component widely used in medical packaging, which mainly comprises an aluminum cover part and a plastic cover part. In the production process, the aluminum sheet is punched into a cover shape by a stamping device, then the plastic cover is produced by a plastic molding equipment, and finally the aluminum cover and the plastic cover are pressed into an aluminum-plastic combined cover.

[0003] The stamping device in the prior art generally comprises an upper punch, a lower die and a driving part for driving the upper punch to move up and down. A recess corresponding to the upper punch is formed on the upper end surface of the lower die. The aluminum sheet is placed on the upper end surface of the lower die. The upper punch moves downward to extrude part of the aluminum sheet into the recess on the lower die, so that the part of the aluminum sheet is deformed into the shape of a cover. The upper punch cuts the part of the aluminum sheet after extrusion and deformation, thereby completing the production of the aluminum cover.

[0004] However, in the prior art, in order to ensure the production efficiency of the aluminum cover, the stamping speed of the upper punch is relatively fast. The relatively fast stamping speed will cause the heat of the upper punch and the lower die to accumulate rapidly, thereby causing the temperature of the upper punch and the lower die to rise. When the temperature of the upper punch and the lower die exceeds a certain value, the springback amount of the aluminum material will increase, thereby causing the deformation of the aluminum cover to be insufficient, and resulting in the production quality of the aluminum cover being substandard. SUMMARY

[0005] The purpose of the present application is to provide a stamping device for producing aluminum-plastic combined covers, which can keep the temperature of the upper punch and the lower die at a relatively low value during work, thereby improving the production quality of the aluminum cover.

[0006] The stamping device for producing aluminum-plastic combined covers provided by the present application adopts the following technical solution: The stamping device comprises a machine body and a die arranged on the machine body. The die comprises an upper die seat and a lower die seat. The lower die seat is fixedly installed on the machine body, and the upper die seat is slidably arranged on the machine body in the vertical direction. The lower end surface of the upper die seat is provided with a punch, and the upper end surface of the lower die seat is provided with a recess corresponding to the punch. A driving assembly for driving the upper die seat to move up and down is arranged on the machine body. A temperature control assembly for controlling the temperature of the upper die seat within a certain range is arranged in the upper die seat. A cooling assembly for reducing the temperature of the lower die seat is arranged in the lower die seat. A thermoelectric power generation assembly is arranged between the upper die seat and the lower die seat.

[0007] Optionally, the temperature control assembly comprises a heat-conducting column, a placing groove for placing the heat-conducting column is formed in the upper die seat, the groove wall at the bottom of the placing groove is close to the working surface of the punch of the upper die seat, a first heat-conducting groove in communication with the placing groove is further formed in the side wall of the upper die seat, and a first heat-conducting block is installed in the first heat-conducting groove, one end of the first heat-conducting block abuts against the side edge of the heat-conducting column, and the other end of the first heat-conducting block extends to outside the first heat-conducting groove.

[0008] Optionally, the cooling assembly comprises a heat dissipation layer and a cold air manufacturing part, an installation cavity for installing the heat dissipation layer is formed in the lower die seat, an air inlet and an air outlet are formed on the installation cavity, a gas guiding channel is formed through the upper die seat, the gas guiding channel is in communication with the upper end of the placing groove, an elastic sheet is arranged at the communication position of the gas guiding channel and the placing groove, a cross-shaped cut is formed in the elastic sheet, the heat-conducting column is made of a temperature control memory alloy material, and the upper end of the heat-conducting column is arranged at a distance from the lower end of the elastic sheet, an air inlet pipe is arranged between one end of the gas guiding channel and the air outlet, an air outlet pipe is arranged between the other end of the gas guiding channel and the air inlet, the cold air manufacturing part is in communication with the air inlet pipe, and the gas guiding channel, the air inlet pipe, the cold air manufacturing part, the installation cavity and the air outlet pipe are sequentially and circularly communicated.

[0009] Optionally, the heat dissipation layer is a graphene layer, and the heat dissipation layer is arranged in a honeycomb shape, and the axis of the honeycomb hole on the heat dissipation layer is perpendicular to the moving path of the punch.

[0010] Optionally, the thermoelectric power generation assembly comprises a first thermoelectric template, the first thermoelectric template is installed at the end of the first heat-conducting block away from the heat-conducting column, a branch cold pipe is arranged on the air inlet pipe, one end of the cold pipe away from the air inlet pipe is in communication with the air outlet pipe, a first cold pipe groove is formed in the circumferential wall of the cold pipe, the cold pipe is installed at the end of the first thermoelectric template away from the first heat-conducting block, the first thermoelectric template seals the first cold pipe groove, and the first thermoelectric template is electrically connected with the cold air manufacturing part through a wire.

[0011] Optionally, the cold air manufacturing part comprises a compressor and a vortex tube, an air inlet hole, a hot gas hole and a cold gas hole are formed in the vortex tube, the air inlet pipe comprises a gas conveying pipe and a backflow pipe, the air inlet hole is in communication with the compressor, the cold gas hole of the vortex tube is in communication with the gas guiding channel through the gas conveying pipe, the air outlet of the lower die seat is in communication with the compressor through the backflow pipe, one end of the cold pipe is in communication with the gas conveying pipe, and the other end is in communication with the air outlet pipe.

[0012] Optionally, the temperature difference power generation assembly further comprises a second thermoelectric template, the upper die holder is provided with a second heat conduction groove, and a second heat conduction block is also arranged in the second heat conduction groove, the second heat conduction block is farther away from the punch than the first heat conduction block, the second heat conduction block is internally provided with a heat storage cavity, the heat storage cavity is provided with a heat storage layer, the second heat conduction block is provided with a heat conduction hole in communication with the heat storage cavity, the hot gas hole of the vortex tube and the heat conduction hole are provided with a heat conduction pipe, the second thermoelectric template is arranged at an end of the second heat conduction block away from the heat conduction column, the circumferential wall of the cold pipe is provided with a second cold conduction groove, the cold pipe is also arranged at an end of the second thermoelectric template away from the second heat conduction block, the second thermoelectric template seals the second cold conduction groove, and the second thermoelectric template is electrically connected with the cold gas manufacturing part through a wire.

[0013] Optionally, the air inlet pipe, the air outlet pipe, the cold pipe and the heat pipe are all arranged in the form of a hose.

[0014] In summary, the present application has at least one of the following beneficial technical effects: 1. The temperature control assembly controls the temperature of the upper die holder and the punch on the upper die holder within a safe range, so that the punch is prevented from being damaged due to excessively high working temperature, and the cooling assembly also has the same effect on the lower die holder, thereby reducing the probability of damage of parts in the stamping device due to overheating, and improving the production quality of the aluminum cover; in addition, the temperature difference power generation assembly in the present application can generate electricity by using the industrial waste heat generated during the working of the stamping device, thereby achieving the effect of energy saving.

[0015] 2. The cold gas manufacturing part comprises a compressor and a vortex tube, the vortex tube has a short response time and can quickly generate cold gas to cool the upper die holder and the lower die holder, and the cold gas generated by the cold gas manufacturing part can also greatly reduce the temperature of the cold end of the electric heating template, so that the temperature difference between the cold end and the hot end of the electric heating template is further increased, thereby greatly improving the power generation benefit of the electric heating template; at the same time, the heat source of the hot end of the first electric heating template is the heat generated by the upper die holder during working, thereby realizing the recycling of resources, and the electric quantity generated by the electric heating template is used for components such as the compressor, thereby greatly reducing the energy consumption of the device.

[0016] 3. The second electric heating die of the application can further utilize the excess industrial waste heat on the upper die holder. When most of the industrial waste heat on the upper die holder is absorbed and utilized by the first electric heating die, and the remaining industrial waste heat cannot supply the second electric heating die or the power generation efficiency of the second electric heating die is low, the second electric heating die can also recycle and utilize the waste heat generated by the vortex tube to generate electric energy, thereby further improving the utilization rate of waste gas resources by the device. The setting of the two electric heating dies can generate relatively sufficient electric power to supply the compressor, ensuring the stable operation of the entire device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application; Figure 2 is a schematic diagram of the cooling assembly in the embodiment of the application; Figure 3 is a schematic diagram of the cooling pipe in the embodiment of the application; Figure 4 is a schematic diagram of the second cooling groove in the embodiment of the application; Figure 5 is a schematic diagram of the temperature control assembly in the embodiment of the application; Figure 6 is Figure 5 is an enlarged schematic diagram of position A in Figure 7 is a schematic diagram of the elastic sheet in the embodiment of the application; Figure 8 is a schematic diagram of the heat dissipation layer in the embodiment of the application; In the figure, 1, machine body; 11, upper die holder; 111, punch; 112, placement groove; 113, first heat conduction groove; 114, second heat conduction groove; 115, air guide channel; 12, lower die holder; 121, recess; 122, installation cavity; 123, air inlet; 124, air outlet; 2, driving assembly; 3, temperature control assembly; 31, heat conduction column; 32, first heat conduction block; 33, second heat conduction block; 331, heat storage cavity; 332, heat conduction hole; 333, heat storage layer; 34, elastic sheet; 341, cross-shaped cutout; 4, cooling assembly; 41, heat dissipation layer; 42, cold air manufacturing part; 421, compressor; 422, vortex tube; 4221, air inlet hole; 4222, hot gas hole; 4223, cold gas hole; 43, air inlet pipe; 431, air conveying pipe; 432, return pipe; 44, air outlet pipe; 5, thermoelectric power generation assembly; 51, first thermoelectric die; 52, second thermoelectric die; 53, cooling pipe; 531, first cooling groove; 532, second cooling groove; 54, heat conduction pipe. DETAILED DESCRIPTION

[0018] The following will be described in detail with reference to the accompanying drawings Figures 1-8The application will be further described in detail.

[0019] A stamping device for producing aluminum plastic combination cover, referring to Figures 1-8 , comprising a machine body 1, a temperature control assembly 3, a temperature reduction assembly 4 and a thermoelectric power generation assembly 5.

[0020] Referring to Figure 1 , the stamping device in the embodiment is generally used in cooperation with a conveying device (not shown in the figure), which continuously transports the aluminum paper to the lower side of the working end of the stamping device, and then transports the aluminum paper after stamping away, so as to realize continuous stamping work, which is a prior art and will not be described in detail here.

[0021] The mold for stamping forming is installed on the machine body 1, the mold comprises an upper die seat 11 and a lower die seat 12, the lower die seat 12 is fixedly installed on the machine body 1, the upper die seat 11 is vertically slidably arranged on the machine body 1, the lower end surface of the upper die seat 11 is provided with a punch 111, the lower die seat 12 is located directly above the upper die seat 11, and the upper end surface of the upper die seat 11 is provided with a groove 121 corresponding to the punch 111, the aluminum paper is located on the upper end surface of the lower die seat 12, the machine body 1 is further provided with a driving assembly 2 for driving the upper die seat 11 to move up and down, the upper die seat 11 is provided with a temperature control assembly 3 for controlling the temperature of the upper die seat within a certain range, the lower die seat 12 is provided with a temperature reduction assembly 4 for reducing the temperature of the lower die seat 12, and the thermoelectric power generation assembly 5 is further arranged between the upper die seat 11 and the lower die seat 12.

[0022] When the stamping device is working, the driving assembly 2 drives the upper die holder 11 to reciprocate along the vertical direction, and the upper die holder 11 drives the punch 111 to reciprocate along the vertical direction. When the punch 111 moves to the lowest point each time, the punch 111 contacts the aluminum paper and extrudes the aluminum paper on the lower die holder 12 into the groove 121 of the lower die holder 12, so that the aluminum paper is extruded into an aluminum cover shape and is cut off by the punch 111. Due to mechanical friction, the temperature of the punch 111 and the lower die holder 12 will increase after a plurality of stamping. When the temperature of the upper punch and the lower die exceeds a certain value, the rebound amount of the aluminum material will increase, so that the aluminum cover is not deformed enough, resulting in that the production quality of the aluminum cover is not up to standard. Therefore, the cooling assembly 4 is started at this time, and the temperature of the punch 111 and the upper die holder 11 is reduced to a safe range by the temperature control assembly 3, so as to reduce the probability of the production quality being reduced due to high temperature of the punch 111. At the same time, the cooling assembly 4 is also started and the temperature of the lower die holder 12 is reduced to a certain range, so as to reduce the probability of the production quality being reduced due to high temperature of the lower die holder 12, thereby improving the production quality of the aluminum cover as a whole. In addition, in the process of stamping, the thermoelectric generator assembly 5 can also generate electricity by using the industrial waste heat generated by the upper die holder 11. The generated electricity can be fed back to the industrial equipment, which greatly improves the utilization rate of resources and saves energy.

[0023] It should be noted that the driving assembly 2 in the embodiment is an AC servo motor + crank slider mechanism (prior art, not described in detail here). The rotary motion of the motor drives the linear motion of the slider. The nominal pressure is about 60KN, which is suitable for high-speed stamping of aluminum covers with a diameter of 15-18mm. The forming frequency can reach 450 times per minute. The motor speed is adjustable, and the motor power is 2.2-3KW. In order to adapt to the high-speed stamping work of the driving assembly 2, the material of the punch 111 in the embodiment is Alumold-150 aluminum alloy or 8566 anti-collapse steel. Both of them have high thermal conductivity, which can timely transfer heat to the temperature control assembly 3 to achieve better cooling purpose. At the same time, Alumold-150 aluminum alloy or 8566 anti-collapse steel has good hardness and can remain stable without cracking under high-speed stamping. The upper die holder 11 and the lower die holder 12 in the embodiment are preferably Cr12MoV die steel, which has excellent anti-cracking property and a compressive strength of ≥1750 MPa, and can withstand high-frequency impact load of stamping.

[0024] With reference to Figure 1 and Figure 5 , the temperature control assembly 3 in the embodiment includes a heat conduction column 31.

[0025] The upper die holder 11 is provided with a placing groove 112 for placing the heat-conducting column 31. The groove wall at the bottom of the placing groove 112 is close to the working surface of the punch 111 of the upper die holder 11. The bottom of the placing groove 112 is located above the working surface of the punch 111, and the distance between the bottom of the placing groove 112 and the working surface of the punch 111 is 3-4 mm. The sidewall of the upper die holder 11 is also provided with a first heat-conducting groove 113 which is in communication with the placing groove 112. In the embodiment, the placing groove 112 is arranged in the vertical direction, and the first heat-conducting groove 113 is arranged in the horizontal direction. The first heat-conducting block 32 is installed in the first heat-conducting groove 113. One end of the first heat-conducting block 32 abuts against the side edge of the heat-conducting column 31, and the other end of the first heat-conducting block 32 extends to the outside of the first heat-conducting groove 113.

[0026] When the punch 111 of the upper die holder 11 is continuously subjected to high-speed stamping, the temperature of the working surface of the punch 111 is relatively high. Then, the heat of the working surface of the punch 111 moves in the direction close to the upper die holder 11. The heat-conducting column 31 which is relatively close to the working surface of the punch 111 can absorb heat faster and conduct the heat to the first heat-conducting block 32. Then, the heat is dissipated to the outside along with the first heat-conducting block 32.

[0027] Referring to Figure 1 , Figure 2 and Figure 3 , the cooling assembly 4 in the embodiment includes a heat dissipation layer 41 and a cold air manufacturing part 42 (in combination with Figure 4 and Figure 5 ).

[0028] The inside of the lower die holder 12 is provided with a mounting cavity 122 for installing the heat dissipation layer 41. The sidewall of the lower die holder 12 is provided with an air inlet 123 and an air outlet 124 which are in communication with the mounting cavity 122. The upper die holder 11 is provided with a gas guiding channel 115 which is in communication with the upper end of the placing groove 112. The communication part between the gas guiding channel 115 and the placing groove 112 is provided with an elastic sheet 34 (in combination with Figure 7 ). The elastic sheet 34 is provided with a cross-shaped cutout 341. The upper end surface of the heat-conducting column 31 is 2 mm away from the lower end of the elastic sheet 34. The heat-conducting column 31 in the embodiment is a nickel-titanium shape memory alloy which expands after being heated and shrinks after returning to normal temperature. One end of the gas guiding channel 115 is provided with an air outlet pipe 44 between the air inlet 123. The other end of the gas guiding channel 115 is provided with an air inlet pipe 43 between the air outlet 124. The cold air manufacturing part 42 is installed on the machine body 1. The cold air manufacturing part 42 is in communication with the air inlet pipe 43. The gas guiding channel 115, the air inlet pipe 43, the cold air manufacturing part 42, the mounting cavity 122 and the air outlet pipe 44 are sequentially and circularly communicated.

[0029] After the punch motor of the device is started, the cold air manufacturing part 42 is started at the same time. The cold air manufactured by the cold air manufacturing part 42 first enters the air inlet pipe 43, and then enters the air guide channel 115 and the installation cavity 122 in turn, and finally returns to the cold air manufacturing part 42 through the air outlet pipe 44. The cold air circulating one circle is heated after absorbing heat, and then the cold air manufacturing part 42 re-cools the cold air that has absorbed heat, then manufactures new cold air and introduces it into the air inlet pipe 43. In the process of cold air circulation, the cold air passes through the installation cavity 122, and the heat dissipation layer 41 is installed in the installation cavity 122, and the heat dissipation layer 41 can absorb most of the heat in the lower die seat 12. Therefore, when the cold air passes through the installation cavity 122, it can contact the heat dissipation layer 41 and take away the heat on the heat dissipation layer 41, and then the heat dissipation layer 41 that has absorbed heat absorbs the heat in the lower die seat 12. Therefore, the overall temperature of the lower die seat 12 will be reduced. In addition, when the heat generated by the punch 111 in the embodiment is too much, that is, the heat on the punch 111 cannot be dissipated in time by the heat conduction column 31 and the first heat conduction block 32, the heat stored in the heat conduction column 31 will increase, that is, the temperature of the heat conduction column 31 will rise. Since the heat conduction column 31 is made of nickel-titanium shape memory alloy, the heat conduction column 31 will deform along its length direction after being heated. The critical value of deformation of the heat conduction column 31 is about 3mm, and the distance between the upper end of the heat conduction column 31 and the elastic sheet 34 is 2mm. Therefore, when the heat conduction column 31 deforms, the upper end surface of the heat conduction column 31 will exert pressure on the elastic sheet 34, so that the elastic sheet 34 deforms elastically. After the elastic sheet 34 deforms, the cross-shaped notch 341 on the surface of the elastic sheet 34 will be opened, so that the placing groove 112 and the air guide channel 115 are in communication, and the upper end surface of the heat conduction column 31 can also extend into the air guide channel 115. The cold air in the air guide channel 115 will absorb the excess heat on the heat conduction column 31, and the excess heat on the heat conduction column 31 is transferred from the punch 111. Therefore, the cold air in the air guide channel 115 can absorb the heat on the punch 111 that cannot be dissipated by the heat conduction column 31 and the first heat conduction block 32, thereby reducing the heat on the punch 111.

[0030] It should be noted that the first heat-conducting block 32 in the embodiment is made of PPS (polyphenylene sulfide) material, which has certain compression deformation resistance and heat deformation resistance, and its heat conductivity is higher than that of nickel-titanium shape memory alloy. It can withstand a working temperature of 200-240°C for a long time, and a peak of 260-285°C for a short time. It remains stable in shape when the temperature exceeds 200°C, and its density is about 1.35 g / cm³, which is 75% lighter than steel, greatly reducing the energy consumption of the device. PPS (polyphenylene sulfide) material has been successfully applied to automobile bumper beams and other structural parts, and has high reliability. In addition, 40% glass fiber can be added to the first heat-conducting block 32 to enhance the compression strength of the first heat-conducting block 32. Therefore, when the punch 111 is working, the heat generated on the punch 111 is first transferred to one end of the heat-conducting column 31 close to the punch 111, and then the heat is transferred to the first heat-conducting block 32 through the one end of the heat-conducting column 31 close to the punch 111. Then the first heat-conducting block 32 dissipates heat in the air, thereby achieving the effect of dissipating heat on the surface of the punch 111 in the air, that is, achieving the effect of cooling the punch 111. When the heat generated by the punch 111 is too much, the first heat-conducting block 32 cannot conduct the heat on the heat-conducting column 31 in time, so the excess heat will be transferred to the one end of the heat-conducting column 31 close to the air guide channel 115. In this process, the heat on the punch 111 is preferentially transferred to the first heat-conducting block 32, and then the excess heat is transferred to the one end of the heat-conducting column 31 close to the air guide channel 115.

[0031] In addition, the heat dissipation layer 41 in the embodiment is a graphene layer (combined Figure 8 ), and the heat dissipation layer 41 is arranged as a hexagonal honeycomb micropore array (pore diameter 50 μm, wall thickness 5 μm). The honeycomb hole axis on the heat dissipation layer 41 is perpendicular to the movement path of the punch 111. The vertically arranged honeycomb structure can improve the compression strength of the heat dissipation layer 41 itself. Therefore, when the heat dissipation layer 41 is installed in the lower die seat 12, the overall compression strength of the lower die seat 12 will not be reduced, on the contrary, the hexagonal honeycomb micropore array heat dissipation layer 41 can improve the compression strength of the lower die seat 12, and the hexagonal honeycomb micropore array heat dissipation layer 41 reduces the accumulation of residual stress inside the lower die seat 12, greatly improving the service life of the lower die seat 12. At the same time, the hexagonal honeycomb micropore array heat dissipation layer 41 has a porous structure, which greatly improves the contact area between itself and the cold air in the installation cavity 122, so that the heat on the heat dissipation layer 41 can be quickly absorbed and taken away by the cold air, thereby greatly improving the heat dissipation efficiency and effect of the cold air on the lower die seat 12.

[0032] It should be noted that when manufacturing the lower mold base 12 in the embodiment, the lower mold base 12 is first manufactured through a conventional casting process, then a mounting cavity 122 which is matched with the shape of the heat dissipation layer 41 is dug out on the side wall or the bottom of the lower mold base 12, the shape of the cavity wall of the mounting cavity 122 is matched with the shape of the outer wall of the heat dissipation layer 41, two holes which are communicated with the mounting cavity 122 are formed on the lower mold base 12, then the heat dissipation layer 41 is installed in the mounting cavity 122, then another iron block which is made of the same material as the lower mold base 12 is processed, the overall appearance shape of the iron block is the same as the shape of the inlet of the mounting cavity 122, then the end of the iron block which is close to the heat dissipation layer 41 is processed into a shape which can fit the outer wall of the heat dissipation layer 41, finally the processed iron block is installed into the gap of the lower mold base 12 at the mounting cavity 122, and the lower mold base 12 and the iron block are welded together through welding, so that the iron block and the lower mold base 12 form an integral whole, and the iron block and the lower mold base 12 together form the relatively closed mounting cavity 122.

[0033] With reference to Figure 1 , Figure 2 and Figure 3 , the thermoelectric generation assembly 5 in the embodiment includes a first thermoelectric template 51.

[0034] The first thermoelectric template 51 is installed at the end of the first heat conduction block 32 which is away from the heat conduction column 31, the inlet pipe 43 is provided with a branch cold pipe 53, the end of the cold pipe 53 which is away from the inlet pipe 43 is communicated with the outlet pipe 44, the peripheral wall of the cold pipe 53 is provided with a first cold channel 531, the peripheral wall of the cold pipe 53 is fixedly connected to the end of the first thermoelectric template 51 which is away from the first heat conduction block 32, and the first thermoelectric template 51 blocks the first cold channel 531 on the cold pipe 53, and the first thermoelectric template 51 is electrically connected to the cold gas manufacturing part 42 through wires (not shown in the figure).

[0035] The first thermoelectric template 51 in the embodiment is essentially a P-type / N-type semiconductor unit, that is, an array of PN junctions which are alternately arranged are composed of bismuth telluride (Bi2Te3) and other semiconductor materials, and then a galvanic arm which is formed by connecting metal current conductors (usually copper sheets) in series, and then a temperature difference environment is established based on the Seebeck effect, that is, one end of the first thermoelectric template 51 which contacts the first heat conduction block 32 absorbs heat, and the other end which contacts the cold pipe 53 releases heat, so that a temperature difference is formed at the two ends of the first thermoelectric template 51, the P-type semiconductor holes in the first thermoelectric template 51 diffuse to the cold end, and the N-type semiconductor electrons migrate to the cold end, thereby generating a potential difference and in turn generating an electric current, then the electrodes in the first thermoelectric template are connected to the cold gas manufacturing part 42 through wires, thereby achieving the effect of generating electricity by utilizing industrial waste heat. It should be noted that the first thermoelectric template 51 also includes other packaging components and heat conduction components, which are prior art and will not be described in detail here.

[0036] In general, the first thermoelectric template 51 in this embodiment needs a temperature difference environment to generate electricity. The punch 111 generates a large amount of industrial waste heat during work, which reduces the service life of the punch 111 and the production quality of the equipment. The heat conduction column 31 and the first heat conduction block 32 can absorb the heat generated by the punch 111 during work, so as to reduce the temperature of the punch 111 and the upper die seat 11, thereby improving the service life of the punch 111 and the production quality of the equipment. At the same time, the heat conduction column 31 and the first heat conduction block 32 absorb the heat generated by the punch 111 and transfer the heat to the first thermoelectric module, thereby creating a relatively high temperature environment required by the first thermoelectric template 51 during work. The cold air produced by the cold air manufacturing part 42 can not only absorb the heat exceeding the heat bearing limit of the first heat conduction block 32, thereby ensuring the temperature control effect of the punch 111 and the upper die seat 11, but also guide part of the cold air produced by the cold air manufacturing part 42 to the first thermoelectric template 51 through the cold pipe 53, thereby creating a relatively low temperature environment required by the first thermoelectric template 51. The relatively high temperature environment and the relatively low temperature environment form a temperature difference environment required by the first thermoelectric template 51, so that the first thermoelectric template 51 can generate electricity, and the electric energy is transmitted to the cold air manufacturing part 42 through the wire. In this process, the cold air produced by the cold air manufacturing part 42 not only reduces the temperature of the punch 111, the upper die seat 11 and the lower die seat 12, but also uses industrial waste heat and the cold air produced by the cold air manufacturing part 42 to supply energy, so that the entire equipment does not need to consume additional energy, thereby achieving the effect of energy saving.

[0037] It should be further pointed out that the temperature of the punch 111 during the work of the stamping device is usually about 350 degrees. Due to the dissipation of the upper die seat 11 and the fact that the heat conduction efficiency cannot reach 100%, the temperature of the heat transferred to the first heat conduction block 32 is about 260 degrees. Therefore, the temperature of the hot end of the first thermoelectric template 51 is 260 degrees, and the cold end of the first thermoelectric template 51 is in contact with the cold air inside the cold pipe 53. The temperature of the cold air produced by the cold air manufacturing part 42 in this embodiment is about -60 degrees. After being transferred through the cold pipe 53, it may absorb part of the heat, so that the temperature of the cold end of the first thermoelectric template 51 is about -40 degrees. The temperature difference between the hot end and the cold end of the first thermoelectric template 51 is about 300 degrees, which is much higher than the required temperature difference environment (the temperature difference is about 200 degrees) of the first thermoelectric template 51. Therefore, the first thermoelectric template 51 can stably generate electricity at this temperature.

[0038] Referring to Figure 1 , Figure 2 and Figure 3 , the cold air manufacturing part 42 in this embodiment includes a compressor 421 and a vortex tube 422 (combined with Figure 5 ).

[0039] The compressor 421 and the vortex tube 422 are fixedly installed on the machine body 1, the vortex tube 422 is provided with an air inlet hole 4221, a hot air hole 4222 and a cold air hole 4223, the air inlet pipe 43 comprises an air conveying pipe 431 and a return pipe 432, the compressor 421 is communicated with the air inlet hole 4221 of the vortex tube 422, the cold air hole 4223 of the vortex tube 422 is communicated with the air guide channel 115 through the air conveying pipe 431, the air outlet 124 of the lower die seat 12 is communicated with the compressor 421 through the return pipe 432, one end of the cold air guide pipe 53 is communicated with the air conveying pipe 431, and the other end is communicated with the air outlet pipe 44, the wires (not shown in the figure) on the first thermoelectric template 51 are electrically connected with the compressor 421, and the compressor 421 in the embodiment is also electrically connected with an external power supply.

[0040] When stamping work is needed, the compressor 421 is powered by an external power supply in advance, after the temperature of the punch 111 rises, the heat on the punch 111 is transmitted to the first thermoelectric template 51 through the heat conduction column 31 and the first heat conduction block 32, the cold air generated by the vortex tube 422 is transmitted to the first thermoelectric template 51 through the cold air guide pipe 53, and the first thermoelectric template 51 starts to power the compressor 421, at this time, the external power supply of the compressor 421 can be stopped, when the compressor 421 works, the compressor 421 guides the compressed air into the vortex tube 422 through the air inlet hole 4221, the vortex tube 422 can separate the hot air and the cold air in the vortex tube 422, and the cold air flows into the air conveying pipe 431 through the cold air hole 4223 of the vortex tube 422, and the hot air in the vortex tube 422 is discharged from the hot air hole 4222 of the vortex tube 422, the vortex tube 422 is a prior art, and will not be described in detail here.

[0041] Referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 , the upper die seat 11 in the embodiment is also provided with a second thermoelectric template 52, the second thermoelectric template 52 is completely same as the first thermoelectric template 51, the upper die seat 11 is provided with a second heat conduction groove 114 communicated with the installation groove at an end away from the first heat conduction block, and the second heat conduction groove 114 is also provided with a second heat conduction block 33, the second heat conduction block 33 is farther away from the punch 111 than the first heat conduction block 32, the second heat conduction block 33 is also horizontally arranged, one end of the second heat conduction block 33 abuts against the heat conduction column 31, and the material and shape of the second heat conduction block 33 are same as those of the first heat conduction block 32, and the difference between the second heat conduction block 33 and the first heat conduction block 32 is that the second heat conduction block 33 is provided with a heat storage cavity 331 (combined with Figure 6), the inside of the heat storage cavity 331 is provided with a heat storage layer 333, the outer wall of the heat storage layer 333 abuts against the cavity wall of the heat storage cavity 331, the second heat-conducting block 33 is provided with a heat-conducting hole 332 communicated with the heat storage cavity 331, a heat-conducting pipe 54 is arranged between the hot gas hole 4222 of the vortex tube 422 and the heat-conducting hole 332, the second thermoelectric template 52 is installed at one end of the second heat-conducting block 33 away from the heat-conducting column 31, the cooling pipe 53 in the embodiment is also installed at one end of the second thermoelectric template 52 away from the second heat-conducting block 33, the cooling pipe 53 is provided with a second cooling groove 532, the second thermoelectric template 52 blocks the second cooling groove 532, and the second thermoelectric template 52 is electrically connected with the compressor 421 through a wire, in addition, it should be noted that the heat-conducting column 31 in the embodiment is not entirely made of nickel-titanium shape memory alloy, one end of the heat-conducting column 31 close to the elastic sheet 34 in the embodiment is made of nickel-titanium shape memory alloy, and the part in contact with the second heat-conducting block 33 and all the parts below the part are made of PPS (polyphenylene sulfide) material, so the heat on the heat-conducting column 31 will be preferentially conducted away through the first heat-conducting block 32 and the second heat-conducting block 33, and the excessive heat will be dissipated through the heat-conducting column 31 itself.

[0042] When the first heat-conducting block 32 fails to timely dissipate the heat on the heat-conducting column 31, the accumulated heat on the heat-conducting column 31 will cause the heat-conducting column 31 to deform, and then the heat-conducting column 31 will be pressed through the elastic sheet 34, so that the end of the heat-conducting column 31 away from the punch 111 extends into the gas guide channel 115 with cold gas, and the heat that the first heat-conducting block 32 fails to timely dissipate will be wasted. The second heat-conducting block 33 can guide the heat that the first heat-conducting block 32 fails to timely dissipate to the hot end of the second thermoelectric template 52, and the cold end of the second thermoelectric template is also in contact with the cold gas in the cold guide pipe 53. At the same time, in order to avoid the situation that the temperature of the second heat-conducting block 33 is relatively low and the temperature difference required by the second thermoelectric template 52 cannot be reached, the heat-conducting pipe 54 in the embodiment transfers the hot gas generated by the vortex tube 422 to the heat storage block in the second heat-conducting block 33 for storage, so as to ensure that the temperature of the second heat-conducting block 33 can be increased to a certain height, thereby ensuring that the temperature difference between the cold end and the hot end of the second thermoelectric template 52 reaches the temperature difference condition required by the second thermoelectric template 52 to generate electricity. Therefore, the second thermoelectric template 52 and the second heat-conducting block 33 in the embodiment can not only make full use of the industrial waste heat on the upper die holder 11 and the punch 111, but also can make full use of the heat generated by the vortex tube 422, thereby greatly improving the utilization rate of industrial waste heat of the device. At the same time, the second thermoelectric template 52 can further supply power to the compressor 421, thereby further achieving the effects of resource utilization and energy saving. The first thermoelectric template 51 and the second thermoelectric template 52 jointly supply power to the compressor 421, thereby greatly improving the working stability of the compressor 421, and further improving the working stability of the device.

[0043] It should be noted that the air inlet pipe 43, the air outlet pipe 44, the cold pipe 53 and the heat pipe 54 in the embodiment are all set as polyimide hoses, which have high heat insulation and high temperature resistance. In actual application, the hot air temperature generated by the vortex tube 422 is usually about 190 degrees. Even if part of the heat is lost due to the transmission of the heat pipe 54, the heat reaching the second heat block 33 can still make the temperature of the second heat block 33 about 160 degrees. In addition to the remaining heat transmitted by the heat column 31, the temperature of the second heat block 33 can still be maintained at about 180 degrees. The temperature of the cold air in the cold pipe 53 is about -40 degrees, and the temperature difference is about 220 degrees, which also exceeds the required temperature difference condition of the second thermoelectric template 52, so the second thermoelectric template 52 can also generate electricity relatively stably. In addition, the heat storage block in the embodiment is made of magnesium oxide matrix material, which has certain compressive strength and good heat storage performance. When the device is in a relatively low temperature environment, the heat of the second heat block 33 is not much, so the heat storage block can store the heat of the second heat block 33 and avoid the heat of the second heat block 33 from being lost too much, so as to ensure that the second thermoelectric template 52 can operate stably. Even if the second thermoelectric template 52 cannot operate, the power provided by the second thermoelectric template 52 is enough for the compressor 421 to work. On the other hand, when the device works in a relatively high temperature environment, the heat of the second heat block 33 is too much, so the heat of the second heat block 33 will be transmitted to the heat column 31, and then the heat column 31 will deform and extend into the air guide channel 115, so that the cold air in the air guide channel 115 can absorb the excess heat.

[0044] The working principle of the stamping device for producing the aluminum-plastic combined cover in the embodiment is as follows: when stamping work is needed, the driving assembly 2, the compressor 421 and the external power source electrically connected with the compressor 421 are started, the punch 111 and the upper die seat 11 move up and down under the driving of the driving assembly 2, at the same time, the compressor 421 cooperates with the cold air generated by the vortex tube 422 to enter the air inlet pipe 43, part of the cold air is branched to the cold air guide pipe 53, the cold air in the air inlet pipe 43 enters the air guide channel 115, the air outlet pipe 44 and the installation cavity 122, and finally returns to the compressor 421, the cold air cools the upper die seat 11 to a certain extent in the process, the cold air cooperates with the heat dissipation layer 41 in the lower die seat 12 to achieve a good cooling effect on the temperature of the lower die seat 12, the cold air entering the cold air guide pipe 53 passes through the cold end of the first thermoelectric template 51 and the second thermoelectric template 52 in turn, and then returns to the air inlet pipe 43; at the same time, the heat generated by the punch 111 during work is transmitted to the first heat conduction block 32 through the heat conduction column 31, the first heat conduction block 32 transmits the heat to the hot end of the first thermoelectric template, the cold end and the hot end of the first thermoelectric template 51 generate a temperature difference, so that power generation can be achieved, and the generated power is transmitted to the compressor 421; in addition, the heat conduction column 31 transmits the heat that cannot be timely transmitted by the first heat conduction block 32 to the second heat conduction block 33, and the hot air generated by the vortex tube 422 is also transmitted to the second heat conduction block 33 through the heat conduction pipe 54, the second heat conduction block 33 is connected with the hot end of the second thermoelectric template 52, and since the cold end of the second thermoelectric template 52 is in contact with the cold air in the cold air guide pipe 53, the cold end and the hot end of the second thermoelectric template 52 also generate a temperature difference, so that the second thermoelectric template 52 can also generate power, and the generated power is transmitted to the compressor 421, and when the first heat conduction block 32 and the second heat conduction block 33 cannot timely transmit the heat on the heat conduction column 31, the heat accumulation in the heat conduction column 31 will cause the temperature of the heat conduction column 31 to rise, so that the heat conduction column 31 will be deformed and elongated by heat, the elastic sheet 34 at the upper end of the heat conduction column 31 is pushed open and extends into the air guide channel 115, and the cold air in the air guide channel 115 will absorb the excessive heat on the heat conduction column 31, since the main source of heat on the heat conduction column 31 is the punch 111, the excessive heat on the punch 111 is removed, that is, when the heat generated by the punch 111 is normal, the first heat conduction block 32 and the second heat conduction block 33 can sufficiently transmit the heat on the heat conduction column 31, and when the heat on the punch 111 is excessive, the heat conduction column 31 will rise in temperature due to the heat that cannot be timely removed, so that the excessive heat on the heat conduction column 31 and the punch 111 is absorbed by the cold air in the air guide channel 115, thereby achieving the cooling effect on the punch 111.

[0045] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A stamping device for producing aluminum-plastic composite caps, characterized in that, The device includes a body (1) and a mold mounted on the body (1). The mold includes an upper mold base (11) and a lower mold base (12). The lower mold base (12) is fixedly mounted on the body (1). The upper mold base (11) is slidably mounted on the body (1) in the vertical direction. A punch (111) is provided on the lower end face of the upper mold base (11). A groove (121) corresponding to the punch (111) is opened on the upper end face of the lower mold base (12). A drive assembly (2) is also provided on the body (1) to drive the upper mold base (11) to move up and down reciprocally. A temperature control assembly (3) is provided in the upper mold base (11) to control the temperature of the upper mold base (11) within a certain range. A cooling assembly (4) is provided in the lower mold base (12) to reduce the temperature of the lower mold base (12). A thermoelectric generator assembly (5) is also provided between the upper mold base (11) and the lower mold base (12).

2. The stamping device for producing aluminum-plastic composite caps according to claim 1, characterized in that, The temperature control component (3) includes a heat-conducting column (31). The upper mold base (11) has a placement groove (112) for placing the heat-conducting column (31). The bottom wall of the placement groove (112) is close to the working surface of the upper punch (111) of the upper mold base (11). The side wall of the upper mold base (11) also has a first heat-conducting groove (113) that communicates with the placement groove (112). A first heat-conducting block (32) is installed in the first heat-conducting groove (113). One end of the first heat-conducting block (32) abuts against the side of the heat-conducting column (31), and the other end of the first heat-conducting block (32) extends to the outside of the first heat-conducting groove (113).

3. A stamping device for producing aluminum-plastic composite caps according to claim 2, characterized in that, The cooling component (4) includes a heat dissipation layer (41) and a cold air generation part (42). The lower mold base (12) has an installation cavity (122) for installing the heat dissipation layer (41). The installation cavity (122) has an air inlet (123) and an air outlet (124). The upper mold base (11) has a through air guide channel (115) that communicates with the upper end of the placement groove (112). An elastic sheet (34) is provided at the connection between the air guide channel (115) and the placement groove (112). The elastic sheet (34) has a cross-shaped cut (341). The heat-conducting column (31) is made of temperature-controlled memory alloy material, and the upper end of the heat-conducting column (31) is set at a certain distance from the lower end of the elastic sheet (34). An air inlet pipe (43) is provided between one end of the air guide channel (115) and the air outlet (124), and an air outlet pipe (44) is provided between the other end of the air guide channel (115) and the air inlet (123). The cold air manufacturing part (42) is connected to the air inlet pipe (43). The air guide channel (115), the air inlet pipe (43), the cold air manufacturing part (42), the mounting cavity (122) and the air outlet pipe (44) are sequentially and cyclically connected.

4. A stamping device for producing aluminum-plastic composite caps according to claim 3, characterized in that, The heat dissipation layer (41) is a graphene layer, and the heat dissipation layer (41) is set in a honeycomb shape, with the axis of the honeycomb holes on the heat dissipation layer (41) perpendicular to the moving path of the punch (111).

5. A stamping device for producing aluminum-plastic composite caps according to claim 4, characterized in that, The thermoelectric power generation component (5) includes a first thermoelectric template (51), which is installed at the end of the first heat-conducting block (32) away from the heat-conducting column (31). A branch cooling pipe (53) is provided on the air inlet pipe (43). The end of the cooling pipe (53) away from the air inlet pipe (43) is connected to the air outlet pipe (44). A first cooling groove (531) is provided on the peripheral wall of the cooling pipe (53). The cooling pipe (53) is installed at the end of the first thermoelectric template (51) away from the first heat-conducting block (32), and the first thermoelectric template (51) seals the first cooling groove (531). The first thermoelectric template (51) is electrically connected to the cold air manufacturing part (42) through a wire.

6. A stamping device for producing aluminum-plastic composite caps according to claim 5, characterized in that, The cold air manufacturing unit (42) includes a compressor (421) and a vortex tube (422). The vortex tube (422) is provided with an air inlet (4221), a hot air inlet (4222) and a cold air inlet (4223). The air inlet pipe (43) includes a gas delivery pipe (431) and a return pipe (432). The air inlet (4221) is connected to the compressor (421). The cold air inlet (4223) on the vortex tube (422) is connected to the air guide channel (115) through the gas delivery pipe (431). The air outlet (124) on the lower mold base (12) is connected to the compressor (421) through the return pipe (432). One end of the cooling pipe (53) is connected to the gas delivery pipe (431), and the other end is connected to the air outlet pipe (44).

7. A stamping device for producing aluminum-plastic composite caps according to claim 6, characterized in that, The thermoelectric power generation component (5) also includes a second thermoelectric template (52). A second heat-conducting groove (114) is provided on the upper mold base (11), and a second heat-conducting block (33) is also installed in the second heat-conducting groove (114). The second heat-conducting block (33) is further away from the punch (111) than the first heat-conducting block (32). A heat storage cavity (331) is provided inside the second heat-conducting block (331), and a heat storage layer (333) is provided inside the heat storage cavity (331). A heat-conducting hole (332) communicating with the heat storage cavity (331) is provided on the second heat-conducting block (33). The vortex tube (42) 2) A heat-conducting pipe (54) is provided between the hot air hole (4222) and the heat-conducting hole (332). The second thermoelectric template (52) is installed at the end of the second heat-conducting block (33) away from the heat-conducting column (31). A second cold-conducting groove (532) is opened on the peripheral wall of the cold-conducting pipe (53). The cold-conducting pipe (53) is also installed at the end of the second thermoelectric template (52) away from the second heat-conducting block (33). The second thermoelectric template (52) seals the second cold-conducting groove (532). The second thermoelectric template (52) is electrically connected to the cold air manufacturing part (42) through a wire.

8. A stamping device for producing aluminum-plastic composite caps according to claim 7, characterized in that, The air inlet pipe (43), air outlet pipe (44), cooling pipe (53), and heat pipe (54) are all made of flexible tubing.

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