Precious metal stamping device

Abstract

The present application relates to a precious metal stamping device, which includes a frame, a hydraulic cylinder, an upper die and a lower die, wherein the hydraulic cylinder, the upper die and the lower die are all connected to the frame, the hydraulic cylinder is connected to the upper die, a receiving groove is provided on the top of the lower die, a plurality of through holes are provided on the bottom wall of the receiving groove, the length direction of the through holes is distributed in the vertical direction, a first lifting column is passed through the through hole, a module is provided on the top of the first lifting column, the top surface of the module and the inner wall of the receiving groove together form the die surface of the lower die, the first lifting column is connected to a first driving member, and the first driving member is used to drive the first lifting column to slide and connect with the inner wall of the through hole in the vertical direction. The present application has the following effects: it can improve the demoulding efficiency of precious metals after stamping.

Description

Technical Field

[0001] The present application relates to the field of punching machines, and in particular to a precious metal punching device. Background Art

[0002] At present, precious metal stamping is a processing method that uses pressure and molds to shape precious metal materials. It is suitable for making precious metal parts with various complex shapes, such as gold, silver, platinum, etc.

[0003] The precious metal stamping process usually includes the following steps:

[0004] Material preparation: Select appropriate precious metal sheets and cut or trim them according to product design requirements.

[0005] Mold design and manufacturing: Design and manufacture the corresponding stamping mold according to the shape and size requirements of the product. The mold usually consists of two parts, the upper part is fixed on the punch press, and the lower part matches the upper part. The material is deformed by applying pressure to the mold.

[0006] Punching operation: The precious metal sheet is placed between dies and then pressure is applied by a punching machine. The pressure causes the precious metal sheet to bend, twist or stretch to form the desired shape.

[0007] Completion of process treatment: After stamping, the precious metal parts undergo subsequent process treatment, such as cleaning, polishing, electroplating, etc., to improve their surface quality and decorative effect.

[0008] A Chinese utility model with application number CN202320857057.8 discloses a high-light metal stamping part, including a frame, a gantry fixedly connected to the top of the frame, a hydraulic cylinder fixedly connected to the top of the gantry, the output shaft of the hydraulic cylinder passes through the top surface of the gantry and is fixedly connected to a punch head, a through hole is provided on the center surface of the top of the frame, a load-bearing column is fixedly connected to the top of the frame and located on the inner side of the gantry, and a clamping mechanism is fixedly connected to the top of the load-bearing column. The utility model provides a clamping mechanism so that the stamping part does not need to be disassembled and replaced when the mold is replaced, so that the mold table of the high-light metal stamping part can be quickly positioned and clamped according to the size of the mold to be replaced, reducing the time for staff to disassemble the mold for replacement and making it more convenient for staff to disassemble the mold for replacement.

[0009] After the precious metal is stamped through the upper die and the lower die, and the upper die rises, the staff needs to manually demould the precious metal to separate the precious metal from the lower die. However, the manual demoulding method has low work efficiency. Summary of the invention

[0010] In order to improve the demoulding efficiency of precious metals after stamping, the present application provides a precious metal stamping device.

[0011] The present application provides a precious metal stamping device, which adopts the following technical solution:

[0012] A precious metal stamping device comprises a frame, a hydraulic cylinder, an upper die and a lower die, wherein the hydraulic cylinder, the upper die and the lower die are all connected to the frame, the hydraulic cylinder is connected to the upper die, a receiving groove is provided on the top of the lower die, a plurality of through holes are provided on the bottom wall of the receiving groove, the length direction of the through holes is distributed in the vertical direction, a first lifting column is passed through the through hole, a module is provided on the top of the first lifting column, the top surface of the module and the inner wall of the receiving groove together form the die surface of the lower die, the first lifting column is connected to a first driving member, and the first driving member is used to drive the first lifting column to slide and connect with the inner wall of the through hole in the vertical direction.

[0013] By adopting the above technical solution, before stamping the precious metal, the first driving member drives the first lifting column to descend, so that the top surface of the module and the inner wall of the containing groove together form the mold surface of the lower mold. After the precious metal is between the upper mold and the lower mold, the hydraulic cylinder drives the upper mold to press down, the upper mold forms the top of the precious metal, and the module and the containing groove form the bottom of the precious metal, so as to complete the stamping of the precious metal. The first driving member drives the first lifting column to rise, and the stamped precious metal can be pushed out of the lower mold, thereby improving the demolding efficiency of the precious metal after stamping.

[0014] Preferably, a ring groove is formed on the top of the first lifting column, a plug-in ring is connected to the bottom of the module, the plug-in ring is plugged into the top of the first lifting column through the ring groove, and the peripheral wall of the module is flush with the peripheral wall of the first lifting column.

[0015] By adopting the above technical solution, the module is plugged into the first lifting column, and the module can be replaced according to the requirements of the precious metal stamping shape, thereby forming different mold surfaces of the lower mold, improving flexibility, and at the same time enriching the processing styles of precious metals to meet the different shape requirements after precious metal stamping.

[0016] Preferably, the first lifting column is provided with a vertical hole, the length direction of the vertical hole is consistent with the length direction of the first lifting column, an air delivery channel is provided in the first lifting column, two ends of the air delivery channel respectively pass through the top inner wall and the bottom inner wall of the vertical hole, the first lifting column is connected to an air source, the air source is communicated with the bottom end of the vertical hole, a second lifting column is arranged in the vertical hole, the second lifting column is connected to a second driving member, the second driving member is used to drive the second lifting column to be slidably connected with the inner wall of the vertical hole along the length direction of the vertical hole, when the second lifting column slides to the top and contacts with the bottom of the module, the second lifting column blocks the top end of the air delivery channel, when the second lifting column slides to between the top and the bottom end of the air delivery channel, the top and the bottom end of the air delivery channel are both communicated with the vertical hole.

[0017] By adopting the above technical solution, when stamping the precious metal, the second driving member drives the second lifting column to rise, the top end of the second lifting column supports the bottom of the module, the second lifting column and the first lifting column support the module together, the air source inflates the vertical hole, and the air pressure can generate a supporting force on the bottom of the second lifting column, thereby reducing the burden of the second lifting column supporting the module, thereby reducing the output force of the second driving member; after stamping the precious metal, the second driving member drives the second lifting column to descend to between the top and bottom ends of the gas transmission channel, the air source inflates the vertical hole, the gas flows from the bottom end of the gas transmission channel to the top end and enters the top of the vertical hole, and when the first driving member drives the first lifting column to rise to eject the precious metal out of the lower mold, the gas can generate a supporting force on the bottom of the module, thereby reducing the burden of the first lifting column ejecting the module, thereby reducing the output force of the first driving member.

[0018] Preferably, the gas source includes an air pump and an air pipe, one end of the air pipe is connected to the air pump, and the other end of the air pipe is connected to the vertical hole, and the air pipe is made of flexible material.

[0019] By adopting the above technical solution, the air pump supplies air to the air pipe, and the air pipe can supply air to the bottom of the vertical hole. When the first lifting column is lifted up and down, the air pipe can be deformed to ensure the air supply efficiency.

[0020] Preferably, a vertical groove is provided at the top end of the second lifting column, and the depth direction of the vertical groove is distributed in the vertical direction. A spring is provided in the vertical groove, one end of the spring is connected to the bottom wall of the vertical groove, and the other end of the spring is detachably connected to the bottom of the module through a connecting column. When the top end of the second lifting column contacts the bottom of the module, the connecting column is located in the vertical groove.

[0021] By adopting the above technical solution, when the second lifting column moves to between the top and bottom of the gas transmission channel, the spring is stretched, and the gas provided by the air pump can provide supporting force for the module. After the precious metal is ejected, the spring can prevent the module from being blown away as much as possible. The module and the connecting column are detachably connected, and different modules can be replaced and connected to the connecting column.

[0022] Preferably, the bottom wall of the vertical groove is rotatably connected to a disc, the disc is horizontally arranged, one end of the spring is connected to the top of the disc, the connecting column is vertically arranged and the bottom end is connected to the other end of the spring, the top peripheral wall of the connecting column is provided with a thread, a screw hole is opened at the bottom of the module, and the top of the connecting column is threadedly connected to the module through the screw hole.

[0023] By adopting the above technical solution, the connecting column is threadedly connected to the module, which can facilitate the removal of different modules after installation. When the threaded connection is made, the disc can rotate to avoid the twisting of the spring as much as possible.

[0024] Preferably, a first label is provided in the screw hole, and a second label is provided at the top of the connecting column, and the first label corresponds to the second label.

[0025] By adopting the above technical solution, the staff can connect the modules and the connecting columns according to the first label and the second label, so as to realize different mold surfaces according to the arrangement of different modules in the lower mold, thereby improving the connection accuracy between the modules and the connecting columns.

[0026] Preferably, baffles are provided on both sides of the lower mold along the width direction, and a conveyor belt is provided on one side of the lower mold along the length direction, and the baffles extend to both ends of the conveyor belt along the width direction.

[0027] By adopting the above technical solution, after each first lifting column pushes the precious metal out of the lower die, each first lifting column is arranged in a stepped shape, which can guide the precious metal to the conveyor belt. The baffle can prevent the precious metal from falling from both sides of the lower die as much as possible, and the conveyor belt can transport the stamped precious metal.

[0028] Preferably, the conveyor belt is arranged at an angle and one end of the conveyor belt close to the lower mold is higher than the other end of the conveyor belt. A conveying groove is opened on the surface of the conveyor belt, and the length direction of the conveying groove is consistent with the length direction of the conveyor belt. A water supply part is provided above the end of the conveyor belt close to the lower mold, and the water supply part is used to inject water into the conveying groove. A filter net is provided above the end of the conveyor belt away from the lower mold, and the bottom end of the filter net is inserted into the conveying groove, and the filter net moves in the horizontal direction.

[0029] By adopting the above technical scheme, the water supply parts can inject water into the conveying trough, the water flow can be maintained in the conveying trough, and the direction of the water flow is the inclination direction of the conveyor belt. After the precious metals are conveyed to the conveying trough, the precious metals can be washed with water to improve the cleanliness of the precious metals. The filter net can intercept the precious metals, so that the stamped precious metals can be preliminarily inspected. After the filter net moves in the horizontal direction, the distance between the bottom of the filter net and the conveying trough becomes larger, and the precious metals can pass under the filter net and be conveyed to the lower end of the conveyor belt.

[0030] Preferably, a water collecting tank is provided below one end of the conveyor belt away from the lower mold, and the water supply component includes a water pump and a water pipe. The water pump is connected to the water collecting tank, one end of the water pipe is connected to the water pump, and the other end of the water pipe faces the conveying trough.

[0031] By adopting the above technical solution, water flows from the conveyor belt into the water collecting tank, and the water pump transports the water to the conveying trough through the water pipe, thereby completing the water circulation. The precious metals fall from the conveyor belt into the water tank. When multiple precious metals fall into the water tank in turn, the water can generate resistance to the falling precious metals, thereby avoiding collisions between the precious metals as much as possible, and avoiding damage and dents of the precious metals as much as possible.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Before stamping the precious metal, the first driving member drives the first lifting column to descend, so that the top surface of the module and the inner wall of the receiving groove together form the mold surface of the lower mold. After the precious metal is between the upper mold and the lower mold, the hydraulic cylinder drives the upper mold to press down, the upper mold forms the top of the precious metal, and the module and the receiving groove form the bottom of the precious metal, so as to complete the stamping of the precious metal. The first driving member drives the first lifting column to rise, and the stamped precious metal can be ejected from the lower mold, so as to improve the demoulding efficiency of the precious metal after stamping;

[0034] 2. When stamping the precious metal, the second driving member drives the second lifting column to rise, the top of the second lifting column supports the bottom of the module, the second lifting column and the first lifting column support the module together, the air source inflates the vertical hole, and the air pressure can generate a supporting force on the bottom of the second lifting column, thereby reducing the burden of the second lifting column supporting the module, thereby reducing the output force of the second driving member; after stamping the precious metal, the second driving member drives the second lifting column to descend to between the top and bottom of the gas transmission channel, the air source inflates the vertical hole, the gas flows from the bottom of the gas transmission channel to the top and enters the top of the vertical hole, when the first driving member drives the first lifting column to rise to eject the precious metal out of the lower die, the gas can generate a supporting force on the bottom of the module, thereby reducing the burden of the first lifting column ejecting the module, thereby reducing the output force of the first driving member;

[0035] 3. After each first lifting column pushes the precious metal out of the lower die, each first lifting column is arranged in a stepped shape, which can guide the precious metal to the conveyor belt. The baffle can prevent the precious metal from falling from both sides of the lower die as much as possible, and the conveyor belt can transport the stamped precious metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0037] Figure 2 It is a partial structural diagram of Example 1 of the present application, used to show the position of the filter after movement.

[0038] Figure 3 It is a partial structural diagram of Example 1 of the present application, used to show the through hole.

[0039] Figure 4 It is a partial structural diagram of Example 1 of the present application, used to show the first lifting column and the module.

[0040] Figure 5 yes Figure 4 Schematic diagram of the exploded structure of the structure in .

[0041] Figure 6 yes Figure 4 Schematic diagram of a partial cross-section of the structure in FIG.

[0042] Figure 7 yes Figure 6 Schematic diagram of the position of the second lifting column after moving.

[0043] Figure 8 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0044] Fig. 9 It is a partial structural diagram of Example 2 of the present application, used to display the module.

[0045] Description of reference numerals:

[0046] 100, frame; 101, hydraulic cylinder; 102, upper die;

[0047] 200, lower die; 201, receiving groove; 202, through hole; 203, baffle;

[0048] 300, first lifting column; 301, first driving member; 302, annular groove; 303, vertical hole; 304, gas transmission channel;

[0049] 400, module; 401, plug-in ring; 402, screw hole; 403, first label;

[0050] 500, gas source; 501, air pump; 502, gas pipeline;

[0051] 600, second lifting column; 601, second driving member; 602, vertical slot; 603, spring; 604, connecting column; 605, disc; 606, second label;

[0052] 700, conveyor belt; 701, conveyor trough; 702, filter screen;

[0053] 800, water supply parts; 801, water pump; 802, water pipe;

[0054] 900. Water collecting tank. DETAILED DESCRIPTION

[0055] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0056] The embodiment of the present application discloses a precious metal stamping device.

[0057] Embodiment 1:

[0058] Reference Figure 1 and Figure 2 The precious metal stamping device includes a frame 100, the frame 100 is connected to a hydraulic cylinder 101, the hydraulic cylinder 101 is vertically arranged and the piston rod is connected to an upper die 102, a lower die 200 is arranged directly below the upper die 102, the lower die 200 is connected to the frame 100, a receiving groove 201 is opened on the top of the lower die 200, a through hole 202 is opened on the bottom wall of the receiving groove 201, a first lifting column 300 is lifted and lowered in the through hole 202, a module 400 is connected to the top of the first lifting column 300, the module 400 and the receiving groove 201 are used to form the bottom of the precious metal, and the first lifting column 300 is used to eject the stamped precious metal from the lower die 200, which can improve the demolding efficiency of the precious metal after stamping.

[0059] Reference Figure 2 and Figure 3 In this embodiment, the lower mold 200 is in a rectangular parallelepiped shape, the through holes 202 are square holes, the length direction of the through holes 202 is distributed along the vertical direction, and there are four through holes 202.

[0060] Reference Figure 4 and Figure 5, the first lifting column 300 is in the shape of a rectangular parallelepiped and is arranged vertically. The first driving member 301 is connected to the bottom of the first lifting column 300. The first driving member 301 adopts a first oil cylinder. The piston rod of the first oil cylinder is arranged vertically in the length direction and the end is connected to the bottom of the first lifting column 300. The first driving member 301 is used to drive the first lifting column 300 to move in the vertical direction. The first lifting column 300 is slidably connected to the inner wall of the through hole 202. An annular groove 302 is provided on the peripheral wall of the top of the first lifting column 300. The annular groove 302 is in the shape of a square ring and passes through the top of the first lifting column 300. The top of the module 400 is hemispherical and convex. In other embodiments, the top of the module 400 can be changed in shape according to the molding requirements of the precious metal, such as a rectangular parallelepiped, an irregular protrusion or a depression. The bottom of the module 400 is connected with a plug ring 401, which is square ring-shaped and plugged into the ring groove 302. After the module 400 is plugged into the top of the first lifting column 300 through the plug ring 401, the side wall of the plug ring 401 is flush with the side wall of the first lifting column 300.

[0061] Reference Figure 2 and Figure 4 When preparing for stamping, the first driving member 301 drives the first lifting column 300 to move to the protruding through hole 202 on the top of the module 400. The inner wall of the accommodating groove 201 and the top surface of each module 400 together form the mold surface of the lower mold 200, so that the bottom of the precious metal can be formed during stamping.

[0062] Reference Figure 5 and Figure 6 The first lifting column 300 is provided with a vertical hole 303, which is a rectangular hole. The length direction of the vertical hole 303 is consistent with the length direction of the first lifting column 300. A second lifting column 600 is slidably arranged in the vertical hole 303 along the length direction. The second lifting column 600 is in a rectangular shape and is arranged vertically. A second driving member 601 is connected to the bottom of the second lifting column 600. The second driving member 601 adopts a second oil cylinder. The piston rod of the second oil cylinder is arranged vertically in the length direction and the end is connected to the bottom of the second lifting column 600. When the second driving member 601 drives the second lifting column 600 to move in the vertical direction, the second lifting column 600 is slidably connected to the inner wall of the vertical hole 303. The second oil cylinder is located below the first lifting column 300. After the piston rod of the second oil cylinder penetrates into the vertical hole 303, it is connected to the second lifting column 600. The piston rod of the second oil cylinder is slidably connected to the inner wall of the bottom of the vertical hole 303.

[0063] Reference Figure 6 and Figure 7The first lifting column 300 is provided with a gas delivery channel 304, the length direction of the gas delivery channel 304 is consistent with the length direction of the first lifting column 300, the top of the gas delivery channel 304 is connected to the top of the vertical hole 303, and the bottom of the gas delivery channel 304 is connected to the bottom of the vertical hole 303. When the second lifting column 600 slides to the top and contacts the bottom of the module 400, the second lifting column 600 blocks the top of the gas delivery channel 304; when the second lifting column 600 slides to between the top and bottom of the gas delivery channel 304, the top and bottom of the gas delivery channel 304 are both connected to the vertical hole 303.

[0064] The module 400 has a screw hole 402 at the bottom, the depth direction of the screw hole 402 is arranged along the vertical direction, and the bottom of the screw hole 402 is connected to the first label 403. The second lifting column 600 has a vertical slot 602 at the top, the length direction of the vertical slot 602 is consistent with the length direction of the second lifting column 600, a disc 605 is rotatably arranged at the bottom of the vertical slot 602, the disc 605 is arranged horizontally and rotatably connected to the bottom wall of the vertical slot 602, a spring 603 is connected to the top of the disc 605, the spring 603 is arranged vertically, the bottom end of the spring 603 is connected to the top of the disc 605, the top of the spring 603 is connected to a connecting column 604, the connecting column 604 is a cylinder and is arranged vertically, the outer peripheral wall of the connecting column 604 is provided with a thread, and the top of the connecting column 604 is provided with a second label 606, the second label 606 corresponds to the first label 403. The connecting column 604 is detachably connected to the bottom thread of the module 400 through the screw hole 402. When the second lifting column 600 moves to the top and contacts the module 400, the bottom end of the connecting column 604 is located in the vertical groove 602. When the second lifting column 600 moves toward the bottom of the vertical hole 303, the spring 603 is stretched.

[0065] Reference Figure 2 and Figure 7 The first lifting column 300 is connected to an air source 500 , and the air source 500 includes an air pump 501 and an air pipe 502 . The air pipe 502 is a hose, one end of the air pipe 502 is connected to the air pump 501 , and the other end of the air pipe 502 is connected to the bottom end of the vertical hole 303 .

[0066] Reference Figure 1 and Figure 2 , a conveyor belt 700 is provided at one end of the lower mold 200 along the length direction, and the conveyor belt 700 is arranged obliquely, and the end of the conveyor belt 700 close to the lower mold 200 is higher than the other end. Baffles 203 are provided at both ends of the lower mold 200 along the width direction, and the baffles 203 are arranged vertically and the length direction is consistent with the length direction of the lower mold 200. The ends of the two baffles 203 extend to both sides of the higher end of the conveyor belt 700 along the width direction. A conveyor groove 701 is provided on the surface of the conveyor belt 700, and the cross section of the conveyor groove 701 is V-shaped. The depth of the middle part of the conveyor groove 701 is greater than the two ends of the width direction, and the length direction of the conveyor belt 700 is consistent with the length direction of the conveyor belt 700.

[0067] A filter screen 702 is arranged above the lower end of the conveyor belt 700. The filter screen 702 is arranged vertically and its bottom end is V-shaped and inserted into the conveying trough 701. The filter screen 702 moves in the horizontal direction. A water collecting tank 900 is arranged below the lower end of the conveyor belt 700. The top of the water collecting tank 900 is opened and filled with water. The water collecting tank 900 is connected to a water supply part 800. The water supply part 800 includes a water pump 801 and a water delivery pipe 802. The water pump 801 is connected to the water collecting tank 900. One end of the water delivery pipe 802 is connected to the water pump 801. The other end of the water delivery pipe 802 is located above the higher end of the conveying trough 701 and faces the conveying trough 701. The water delivery pipe 802 injects water into the conveying trough 701.

[0068] The implementation principle of Example 1 is as follows: each first driving member 301 drives each first lifting column 300 to rise and fall to reset the module 400, each second driving member 601 drives each second lifting column 600 to contact the bottom of the module 400, and puts the precious metal into the receiving groove 201. When the upper mold 102 and the lower mold 200 are stamping the precious metal, the gas pipe 502 supplies gas to the vertical hole 303. After the precious metal is stamped, the upper mold 102 rises, each second driving member 601 drives each second lifting column 600 to fall to separate the second lifting column 600 from the module 400, and the gas transported by the gas pipe 502 enters the top of the vertical hole 303. Each first driving member 301 drives each first lifting column 300 to rise to eject the stamped precious metal, and the precious metal is ejected from the lower mold 200 to the conveying groove 701 of the conveyor belt 700, and the conveyor belt 700 drives the precious metal to be transported to the water collecting tank 900. In this way, the demoulding efficiency of the precious metal after stamping can be improved.

[0069] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that the number of modules 400 is different.

[0070] Reference Figure 8 and Fig. 9 The precious metal stamping device includes a lower die 200, a receiving groove 201 is opened on the top of the lower die 200, and a plurality of through holes 202 are opened at the bottom of the receiving groove 201. The plurality of through holes 202 are interconnected to form a large rectangular hole. There are multiple modules 400 and they are distributed in a rectangular lattice. The side walls of the first lifting columns 300 connected to adjacent modules 400 are in contact with each other and fill the large rectangular hole.

[0071] The implementation principle of Example 2 is as follows: after the precious metal is stamped, when the first lifting column 300 rises to eject the precious metal, the first lifting column 300 far away from the conveyor belt 700 has the highest height after rising, and the first lifting column 300 close to the conveyor belt 700 has the lowest height after rising. The first lifting columns 300 are distributed in a stepped manner after rising, which can conveniently guide the ejected precious metal to the conveyor belt 700, thereby facilitating the discharge of the precious metal.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precious metal stamping device, comprising a frame (100), a hydraulic cylinder (101), an upper die (102) and a lower die (200), wherein the hydraulic cylinder (101), the upper die (102) and the lower die (200) are all connected to the frame (100), and the hydraulic cylinder (101) is connected to the upper die (102), characterized in that: The lower mold (200) has a receiving groove (201) on its top, and a plurality of through holes (202) on its bottom wall. The length direction of the through holes (202) is distributed in the vertical direction. A first lifting column (300) is passed through the through hole (202). A module (400) is provided on the top of the first lifting column (300). The top surface of the module (400) and the inner wall of the receiving groove (201) together form the mold surface of the lower mold (200). The first lifting column (300) is connected to a first driving member (301). The first driving member (301) is used to drive the first lifting column (300) to be slidably connected to the inner wall of the through hole (202) along the vertical direction. The top of the first lifting column (300) is provided with an annular groove (302), the bottom of the module (400) is connected with an inserting ring (401), the inserting ring (401) is inserted into the top of the first lifting column (300) through the annular groove (302), and the peripheral wall of the module (400) is flush with the peripheral wall of the first lifting column (300); The first lifting column (300) is provided with a vertical hole (303), the length direction of the vertical hole (303) is consistent with the length direction of the first lifting column (300), the first lifting column (300) is provided with a gas transmission channel (304), the two ends of the gas transmission channel (304) respectively pass through the top inner wall and the bottom inner wall of the vertical hole (303), the first lifting column (300) is connected to an air source (500), the air source (500) is connected to the bottom end of the vertical hole (303), and a second lifting column (600) is provided in the vertical hole (303), and the second lifting column (600) ) is connected to a second driving member (601), the second driving member (601) being used to drive the second lifting column (600) to slide and connect with the inner wall of the vertical hole (303) along the length direction of the vertical hole (303), when the second lifting column (600) slides to the top and contacts with the bottom of the module (400), the second lifting column (600) blocks the top of the gas transmission channel (304), when the second lifting column (600) slides to between the top and bottom of the gas transmission channel (304), the top and bottom of the gas transmission channel (304) are both connected with the vertical hole (303); The gas source (500) comprises an air pump (501) and an air pipe (502), one end of the air pipe (502) is connected to the air pump (501), and the other end of the air pipe (502) is connected to the vertical hole (303), and the air pipe (502) is made of a flexible material; A vertical groove (602) is provided at the top end of the second lifting column (600), the depth direction of the vertical groove (602) is distributed along the vertical direction, a spring (603) is provided in the vertical groove (602), one end of the spring (603) is connected to the bottom wall of the vertical groove (602), and the other end of the spring (603) is detachably connected to the bottom of the module (400) via a connecting column (604), and when the top end of the second lifting column (600) contacts the bottom of the module (400), the connecting column (604) is located in the vertical groove (602); The bottom wall of the vertical groove (602) is rotatably connected to a disk (605), the disk (605) is arranged horizontally, one end of the spring (603) is connected to the top of the disk (605), the connecting column (604) is arranged vertically and the bottom end is connected to the other end of the spring (603), the top peripheral wall of the connecting column (604) is provided with a thread, the bottom of the module (400) is provided with a screw hole (402), and the top of the connecting column (604) is threadedly connected to the module (400) through the screw hole (402); A first label (403) is provided in the screw hole (402), and a second label (606) is provided at the top of the connecting column (604), and the first label (403) corresponds to the second label (606).

2. The precious metal stamping device according to claim 1, characterized in that: Baffles (203) are provided on both sides of the lower mold (200) along the width direction, a conveyor belt (700) is provided on one side of the lower mold (200) along the length direction, and the baffles (203) extend to both ends of the conveyor belt (700) along the width direction.

3. The precious metal stamping device according to claim 2, characterized in that: The conveyor belt (700) is arranged obliquely, and one end of the conveyor belt (700) close to the lower mold (200) is higher than the other end of the conveyor belt (700); a conveying groove (701) is provided on the surface of the conveyor belt (700); the length direction of the conveying groove (701) is consistent with the length direction of the conveyor belt (700); a water supply component (800) is provided above one end of the conveyor belt (700) close to the lower mold (200); the water supply component (800) is used to inject water into the conveying groove (701); a filter screen (702) is provided above one end of the conveyor belt (700) away from the lower mold (200); the bottom end of the filter screen (702) is inserted into the conveying groove (701); and the filter screen (702) moves in the horizontal direction.

4. The precious metal stamping device according to claim 3, characterized in that: A water collecting tank (900) is provided below one end of the conveyor belt (700) away from the lower mold (200); the water supply component (800) comprises a water pump (801) and a water delivery pipe (802); the water pump (801) is connected to the water collecting tank (900); one end of the water delivery pipe (802) is connected to the water pump (801); and the other end of the water delivery pipe (802) faces the conveying trough (701).

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