Sinking cylinder plate changing device

Abstract

The utility model discloses a sinking cylinder plate changing device which comprises a forming chamber, a forming cylinder, a cylinder body driving device, a forming bottom plate, a push-out table and an ejection table, the forming cylinder can be installed on the lower side of the forming chamber in a lifting motion mode, the cylinder body driving device drives the forming cylinder to do the lifting motion, and when the forming cylinder ascends to the designated height, the forming bottom plate is pushed out through the push-out table. The outer side wall of the upper end of a cylinder body of the forming cylinder can be inserted into the hollowed-out structure of the lower side face of the forming chamber in a sealed mode, when the forming cylinder descends to a certain height, a discharging gap can be formed between the cylinder body of the forming cylinder and the lower side face of the forming chamber, the forming bottom plate can be placed on a piston of the forming cylinder, and the push-out table and the ejection table can be located on the two sides of the forming cylinder correspondingly. The push plate device can push a new forming bottom plate on the push-out table to the surface of a piston of a forming cylinder which descends to a certain height, and push an original forming bottom plate on the piston of the forming cylinder and a forming piece on the original forming bottom plate to the push-out table, and the large forming bottom plate can be rapidly, safely and reliably taken.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, in particular to a cylinder sinking and plate changing device. Background Art

[0002] The laser melting forming equipment in the 3C field is called 3C-SLM equipment. Its characteristics are small forming parts, short stroke, and large number of pieces formed at one time. Large and super large 3C-SLM equipment can form dozens or even hundreds of pieces at one time, and the forming base plate structure and weight are both very large. How to replace the large forming base plate is one of the key issues in the design of large 3C-SLM equipment. Utility Model Content

[0003] In order to overcome the above defects, the utility model provides a sinking cylinder plate changing device, which can complete the replacement of the old plate of the formed bottom plate with the new plate at one time, and the utility model is fast, safe, reliable and easy to automatically complete the retrieval and plate replacement.

[0004] The utility model adopts a technical solution to solve its technical problems: a cylinder sinking and plate changing device, comprising a forming chamber and a forming cylinder, and is also provided with a cylinder driving device, a forming bottom plate, a pushing platform and an ejecting platform, wherein a hollow structure is formed on the lower side surface of the forming chamber, and the forming cylinder can be installed on the lower side of the forming chamber so as to be able to move up and down. The cylinder driving device drives the forming cylinder to move up and down. When the forming cylinder rises to a specified height, the outer wall of the cylinder body of the forming cylinder can be sealed and inserted in the hollow structure on the lower side surface of the forming chamber. When the forming cylinder descends to a certain height, a discharging gap can be formed between the cylinder body of the forming cylinder and the lower side surface of the forming chamber. The forming bottom plate can be placed on the piston of the forming cylinder, and the pushing platform and the ejecting platform can be respectively located on both sides of the forming cylinder. A pushing plate device is provided on the pushing platform, and the pushing plate device can push the new forming bottom plate on the ejecting platform to the piston surface of the forming cylinder that has descended to a certain height, and push the original forming bottom plate on the piston of the forming cylinder together with the formed part thereon to the ejecting platform.

[0005] As a further improvement of the utility model, the pushing plate device is an active conveying roller arranged at the upper end of the pushing platform, and the active conveying roller can actively convey the new forming base plate toward the forming cylinder. The height of the active conveying roller at the upper end of the pushing platform close to the forming cylinder is higher than the height of the upper surface of the piston of the forming cylinder; the upper end of the ejection platform is provided with an active conveying roller or a passive conveying roller, and the original forming base plate on the piston of the forming cylinder can be pushed by the new forming base plate onto the active conveying roller or the passive conveying roller at the upper end of the ejection platform.

[0006] As a further improvement of the utility model, the upper surface of the piston is provided with a linear guide mechanism extending in the direction in which the push plate device on the push-out platform pushes out the newly formed bottom plate, and the formed bottom plate can slide into or out of the upper surface of the piston along the linear guide mechanism.

[0007] As a further improvement of the utility model, a positioning pin that can be raised and lowered is provided on the upper surface of the piston of the forming cylinder, and a recessed positioning groove is provided on the lower side of the forming base plate. The positioning pin can be inserted into the positioning groove of the forming base plate to stop and position the forming base plate.

[0008] As a further improvement of the present invention, raised stoppers are respectively provided on both sides of the upper end of the ejector platform perpendicular to the moving direction of the forming base plate, and the two side walls of the forming base plate entering the ejector platform perpendicular to its moving direction are stopped on the raised stoppers. The ejector platform is also provided with a forming base plate locking mechanism and a forming base plate ejection mechanism. The forming base plate locking mechanism can fix and position the forming base plate that is completely entered onto the ejector platform. The forming base plate ejection mechanism includes an ejector rod and an ejector rod driving device. A plurality of ejector rods are installed in the ejector platform so as to be able to move up and down. The upper end of the ejector rod can rise to lift the forming base plate on the ejector platform, and the ejector rod driving device drives the ejector rod to move up and down.

[0009] As a further improvement of the utility model, an AGV trolley is also provided, and the push-out platform and the ejection platform are respectively arranged on the AGV trolley.

[0010] As a further improvement of the present invention, a slider is fixedly provided on the outer wall of the cylinder body of the forming cylinder, a forming equipment frame is fixedly provided under the forming chamber, the forming cylinder is located in the forming equipment frame, a vertically extending linear guide rail is provided on the side wall of the forming equipment frame, the slider can slide up and down along the linear guide rail, the cylinder driving device includes a servo motor and a screw rod, the servo motor is fixedly installed on the forming equipment frame, the screw rod can rotate in the circumferential direction and is installed on the inner side wall of the forming equipment frame for axial stop, the screw rod is movably screwed to the slider on the outer side wall of the cylinder body of the forming cylinder, and the upper ends of the push-out platform and the ejection platform facing the forming cylinder are respectively formed with horizontal extension parts, and the horizontal extension parts can cross the forming equipment frame and connect with the outer side wall of the cylinder body of the forming cylinder.

[0011] As a further improvement of the present invention, the forming base plate includes a base plate body and base plate sub-components, and the plurality of base plate sub-components are detachably fixedly mounted on the upper surface of the base plate body, and the upper side surfaces of the plurality of base plate sub-components are spliced ​​to form a forming surface for forming the formed piece.

[0012] The beneficial effects of the utility model are as follows: the utility model obtains the spatial conditions for taking out the forming bottom plate and the formed parts welded thereon between the forming chamber and the forming cylinder by the "twice-sinking" method; when the utility model sinks for the first time, the forming cylinder, the piston and the forming bottom plate with the formed parts welded thereon are vertically sunk at the same time to ensure that the highest point of the formed parts is lower than the bottom plane of the forming chamber; when the utility model sinks for the second time, the existing height of the piston and the forming bottom plate with the formed parts welded thereon is fixed, and the cylinder body of the forming cylinder continues to be vertically sunk to create the spatial conditions for horizontally pushing out the forming bottom plate and the formed parts welded thereon; the action of replacing the forming bottom plate adopts the method of using the new forming bottom plate to push the original forming bottom plate under this spatial condition, so that the old plate is replaced with the new plate at one time. The advantages of the utility model are that the removal of large-scale forming bottom plates is fast, safe, reliable and easy to realize automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The following is a process principle diagram for taking out parts by using the utility model;

[0014] Figure 2 It is a three-dimensional diagram of the push-out platform and the forming cylinder of the utility model;

[0015] Figure 3 This is a three-dimensional diagram of the plate replacement completion state of the utility model;

[0016] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0017] Figure 5 This is the front view of the utility model in the state of starting to push the plate;

[0018] Figure 6 This is the front view of the utility model in the push plate state;

[0019] Figure 7 This is the front view of the utility model in the state of the push plate being completed;

[0020] Figure 8 This is a schematic diagram of the forming base plate of the utility model being in a locked state on the piston of the forming cylinder;

[0021] Fig. 9 It is a schematic diagram of the forming base plate of the utility model in an unlocked state on the piston of the forming cylinder;

[0022] Fig.10 This is a three-dimensional diagram of the formed base plate. DETAILED DESCRIPTION

[0023] 1 and 1 , and the push plate 2 is pressed against the push rod 3 and the push rod 3 is pressed against the push rod 3. When the push rod 3 is pressed, the push rod 3 and the push rod 3 are pressed against the push rod 3. When the push rod 3 is pressed, the push rod 3 and the push rod 3 are pressed against the push rod 3.

[0024] By arranging a forming cylinder capable of lifting and lowering movement under the forming chamber 1, the spatial conditions for taking out the forming base plate 2 and the formed part 8 welded thereon are created by sinking the forming cylinder. When the forming cylinder rises to the upper limit position, the upper end of the forming cylinder is sealed and aligned with the lower forming surface in the forming chamber 1 to form an integrated structure. By spreading powder in the forming cylinder, the powder in the forming cylinder is laser scanned by a laser. Accompanied by the layer-by-layer descent of the piston 7 in the forming cylinder, the layer-by-layer spreading of powder by the powder spreading device and the laser scanning of each layer of powder by the laser, the processing and forming of the formed part 8 is finally realized. When the processing of the formed part 8 is completed and the powder is cleared, the cylinder body 6, piston 7 and the forming base plate 2 welded with the formed part 8 are vertically sunk (that is, the forming cylinder is sunk as a whole) to ensure that the highest point of the formed part 8 is lower than the bottom plane 13 of the forming chamber 1. Then, the height of the piston 7 and the forming base plate 2 welded with the formed part 8 is fixed, and the cylinder body 6 of the forming cylinder continues to be vertically sunk until the formed part 8 is formed. The upper end of the cylinder body 6 of the forming cylinder is lower than the lower side of the forming base plate 2. At this time, the piston 7 of the forming cylinder and the cylinder body 6 of the forming cylinder are still in a sealed plug-in state. Then, a new forming base plate 2 on the pushing plate platform is pushed toward the piston 7 of the forming cylinder by the pushing plate device on the pushing plate platform. The new forming base plate 2 pushes the original forming base plate 2 with the formed part 8 welded on the piston 7 of the forming cylinder. When the original forming base plate 2 with the formed part 8 welded on the piston 7 of the forming cylinder is pushed out onto the ejection platform 4, the new forming base plate 2 is just placed on the piston 7 of the forming cylinder to complete the plate changing operation. Then the cylinder body 6 of the forming cylinder and the piston 7 of the forming cylinder can be sequentially raised and reset. The above device realizes the smooth plate changing and picking up of large-scale forming base plates 2, improves the convenience of picking up large and super-large 3C-SLM equipment, reduces the difficulty of picking up large and super-large 3C-SLM equipment, and improves the plate changing efficiency of large and super-large 3C-SLM equipment.

[0025] The pushing plate device is an active conveying roller 31 arranged at the upper end of the pushing platform 3. The active conveying roller 31 can actively convey the new forming base plate 2 toward the forming cylinder. The height of the active conveying roller 31 on the upper end of the pushing platform 3 close to the forming cylinder side is higher than the height of the upper surface of the piston 7 of the forming cylinder; the upper end of the ejecting platform 4 is provided with an active conveying roller 31 or a passive conveying roller 41, and the original forming base plate 2 on the piston 7 of the forming cylinder can be pushed by the new forming base plate 2 onto the active conveying roller 31 or the passive conveying roller 41 on the upper end of the ejecting platform 4.

[0026] The pushing plate is realized by adopting the active conveying roller 31 to convey the large forming base plate 2 forward in a translational manner. The structure is simple, and the conveying speed can be adjusted according to the rotation speed of the active conveying roller 31 as needed. The forming base plate 2 will not be worn during the conveying process. It is best to set a height-adjusting roller with adjustable height on the side of the pushing platform 3 close to the forming cylinder to adjust the height of the forming base plate 2 entering the forming cylinder to help the forming base plate 2 smoothly enter the top surface of the piston 7. The height of the height-adjusting roller is preferably slightly higher than the height of the other active conveying rollers 31 of the pushing platform 3, so that the forming base plate 2 forms an upturned state at the end of the pushing platform 3 to avoid To avoid interference with the forming cylinder, the new forming bottom plate 2 moves from the ejection platform 3 to the forming cylinder piston 7 in the following process: first, it moves forward while tilting and curling. When the new forming bottom plate 2 passes over the upper end of the cylinder body 6 of the forming cylinder, the edge of its curled end begins to contact the side wall of the original forming bottom plate 2 on the piston 7. While the new forming bottom plate 2 continues to be transported forward, it pushes the original forming bottom plate 2 on the piston 7 to move toward the ejection platform 4. As the new forming bottom plate 2 moves forward, its curled end gradually tilts downward and enters the surface of the piston 7 until the entire new forming bottom plate 2 is placed flat on the piston 7 of the forming cylinder, and at the same time, the original forming bottom plate 2 is completely detached. The piston 7 of the forming cylinder just falls on the ejection platform 4 to realize the replacement of the forming bottom plate 2. The upper end of the ejection platform 4 is provided with an active conveying roller 31 or a passive conveying roller 41, so that after the original forming bottom plate 2 on the forming cylinder piston 7 is pushed to the upper end of the ejection platform 4, it moves forward along the active conveying roller 31 or the passive conveying roller 41. It is in rolling contact with the active conveying roller 31 or the passive conveying roller 41, and the friction force is small, which is convenient for smooth translation and will not wear the forming bottom plate 2. The active conveying roller 31 on the ejection platform 4 can actively move the forming bottom plate 2 to the ejection platform 4, reducing the impact of the new forming bottom plate 2 on the original forming bottom plate 2 The push plate device on the ejection platform 3 may also use a conveyor belt, or a horizontal telescopic ejection device, such as a cylinder driving a push plate to push a new forming base plate 2 placed on the upper end of the ejection platform 3, or a motor and a screw rod 122 nut mechanism to push the push plate, etc. The ejection platform 4 may also not be provided with an interactive conveyor roller or a passive conveyor roller 41, and may also be provided with a conveyor belt, or a ball bearing, etc. This is an equivalent replacement structure that can be easily thought of by technicians in this field based on this patent, and all belong to the protection scope of this patent.

[0027] The upper surface of the piston 7 is provided with a linear guide mechanism extending in the direction in which the push plate device on the push-out platform 3 pushes out the new formed bottom plate 2, and the formed bottom plate 2 can slide into or out of the upper surface of the piston 7 along the linear guide mechanism. The linear guide mechanism on the upper surface of the piston 7 can be a raised guide rail 71 or a recessed guide slideway, and the lower side of the formed bottom plate 2 can be correspondingly provided with a recessed guide groove 21 or a raised guide block. When the formed bottom plate 2 is pushed onto the piston 7, the guide groove or guide block on the lower side of the formed bottom plate 2 slides along the guide rail or slideway on the piston 7 for sliding guidance. The optimal structure is to arrange two parallel raised guide rails at intervals on the piston 7, and to arrange two parallel guide grooves at the lower end of the formed bottom plate 2, thereby realizing double-rail guidance, which is conducive to improving the guidance accuracy.

[0028] A positioning pin 72 that can be raised and lowered is also provided on the upper surface of the piston 7 of the forming cylinder, and a recessed positioning groove 22 is also provided on the lower side of the forming base plate 2. The positioning pin 72 can be inserted into the positioning groove 22 of the forming base plate 2 to stop and position the forming base plate 2.

[0029] The locating pins 72 on the piston 7 are inserted into the locating grooves 22 on the lower side of the locating plate 2 to realize the locking and positioning of the locating plate 2 in the horizontal direction. It is better to respectively set the rotating locating pins 72 of the eccentric structure on the two side walls of the locating cylinder piston 7 along the extension direction of the linear guide mechanism. The locating pins 72 are rotated to extend to the top of the piston 7 and tightly abut against the two side walls of the locating plate 2 along the extension direction of the linear guide mechanism, and then the locating plate 2 is fixedly positioned on the piston 7 through the linear guide mechanism. In order to avoid the locating pins 72 protruding to the outside of the piston 7 and affecting the sealing and sliding of the piston 7 up and down in the locating cylinder, it is better to set the recessed avoidance grooves on the side walls of the piston 7. Similarly, recessed avoidance grooves are also set on the two side walls of the locating plate 2. After the plug 7 is installed, the avoidance groove on the side wall of the forming base plate 2 is just connected to the avoidance groove on the side wall of the piston 7, and the rotatable locating pin 72 is completely accommodated in the avoidance groove on the side wall of the piston 7 in the unlocked state. After the rotatable locating pin 72 is rotated 90 degrees, its eccentric portion extends to the outer side of the upper end of the piston 7 and enters the avoidance groove of the forming base plate 2, clamping the bottom surface of the avoidance groove of the forming base plate 2. The rotatable locating pin 72 can be rotated manually. In order to facilitate rotation, a hexagonal countersunk head or a square countersunk head can be set on its surface to facilitate the rotation after the hardware tool is inserted. It can also be driven by an electric device to rotate automatically, etc. In addition to adopting an eccentric rotating structure, the locating pin 72 can also adopt a vertical lifting method, such as a latch type. This is a structure that a technician in this field can easily think of based on this patent, and it all falls within the scope of protection of this patent.

[0030] The upper end of the ejector platform 4 is provided with raised stoppers 42 on both sides perpendicular to the moving direction of the forming base plate 2. The two side walls of the forming base plate 2 entering the ejector platform 4 are stopped on the raised stoppers 42. The ejector platform 4 is also provided with a forming base plate locking mechanism 43 and a forming base plate ejection mechanism 44. The forming base plate locking mechanism 43 can fix and position the forming base plate 2 that completely enters the ejector platform 4. The forming base plate ejection mechanism 44 includes a push rod and a push rod driving device. A plurality of push rods are installed in the ejector platform 4 so as to be able to move up and down. The upper end of the push rod can rise and lift the forming base plate 2 on the ejector platform 4. The push rod driving device drives the push rod to move up and down.

[0031] When the original forming bottom plate 2 welded with the formed part 8 is pushed from the piston 7 to the upper end of the ejection platform 4, the two side walls of the forming bottom plate 2 are guided and guided by the raised stopper 42 on the ejection platform 4, and slide forward in a straight line to prevent it from falling from the ejection platform 4. When it completely reaches the ejection platform 4, the forming bottom plate 2 is locked on the ejection platform 4 by the forming bottom plate locking mechanism 43 to prevent the forming bottom plate 2 from falling during the movement and transportation of the ejection platform 4. The forming bottom plate locking mechanism 43 can be a positioning pin 72, and its structure can be the same as the structure of the rotating positioning pin 72 installed on the piston 7. By clamping the two side surfaces of the forming bottom plate 2, the forming bottom plate 2 is fixed in place together with the raised stopper 42. The ejector platform 4 may also be a lifting slide pin, or a screw lock, etc., as long as the forming base plate 2 can be locked on the ejector platform 4, technical personnel in this field can adaptably select and grasp according to this patent, and they all fall within the scope of protection of this patent. When the forming base plate 2 is transported to the workstation where the formed part 8 is removed, the forming base plate 2 can be lifted from the ejector platform 4 by the forming base plate ejection mechanism 44, which is convenient for the transportation of the forming base plate 2. The forming base plate ejection mechanism 44 can be an air cylinder or oil cylinder arranged in the ejector platform 4, or a motor-driven screw rod 122 nut mechanism, a motor-driven cam mechanism, or a manually driven screw rod 122 nut mechanism, a manually driven cam mechanism, etc.

[0032] An AGV trolley 9 is also provided, and the push-out platform 3 and the ejection platform 4 are respectively provided on the AGV trolley 9. The push-out platform 3 and the ejection platform 4 are transported by the AGV trolley 9, thereby realizing the connection between the new forming bottom plate 2 loading station and the plate changing station, and realizing the connection between the plate changing station and the forming part 8 cutting and picking station, without manual handling, which is convenient for transportation between different stations and intelligent control.

[0033] A slider 61 is fixedly provided on the outer wall of the cylinder body 6 of the forming cylinder, a forming equipment frame 12 is fixedly provided below the forming chamber 1, the forming cylinder is located in the forming equipment frame 12, a vertically extending linear guide 121 is provided on the side wall of the forming equipment frame 12, the slider 61 can slide up and down along the linear guide 121, the cylinder driving device 5 includes a servo motor and a screw rod 122, the servo motor is fixedly installed on the forming equipment frame 12, the screw rod 122 can rotate in the circumferential direction and is installed on the inner side wall of the forming equipment frame 12 with axial stop, the screw rod 122 is movably screwed with the slider 61 on the outer wall of the cylinder body 6 of the forming cylinder, and the upper ends of the ejection platform 3 and the ejection platform 4 facing the forming cylinder are respectively formed with horizontal extensions, and the horizontal extensions can cross the forming equipment frame 12 and connect with the outer wall of the cylinder body 6 of the forming cylinder. The above-mentioned cylinder driving device 5 can realize high-precision driving of the forming cylinder, which is convenient for ensuring that the oil cylinder moves accurately up and down to the forming station and the pickup station.

[0034] The forming base plate 2 includes a base plate body 23 and a base plate sub-component 24. The plurality of base plate sub-components 24 are detachably fixedly mounted on the upper surface of the base plate body 23. The upper side surfaces of the plurality of base plate sub-components 24 are spliced ​​to form a forming surface for forming the formed part 8. The forming base plate 2 is designed as a separate structure of the base plate body 23 and the base plate sub-components 24. When taking out the parts, the base plate sub-components 24 together with the formed part 8 welded thereon can be taken out from the base plate body 23. Since the base plate sub-components 24 are small in size, they are convenient to carry and to position and precisely cut on the wire cutting equipment for taking out the parts. When taking out the parts, it is not necessary to position the entire forming base plate 2 on the wire cutting equipment for cutting and taking out the parts, which reduces the difficulty of wire cutting and taking out the parts, and is not easy to cause the metal wire of the wire cutting equipment to break and damage.

[0035] A forming chamber sinking cylinder plate replacement and piece taking method, the specific steps are as follows:

[0036] Step 1: After the formed part 8 is formed in the forming chamber 1, powder is cleaned;

[0037] Step 2: After the powder is cleaned, the cylinder body 6 and the piston 7 of the forming cylinder move vertically downward synchronously to a height position where the formed part 8 can move horizontally outward;

[0038] Step 3: The cylinder body 6 of the forming cylinder continues to move downward until the forming bottom plate 2 can be moved out horizontally;

[0039] Step 4: The AGV trolley 9 brings a new forming bottom plate 2, and the ejection platform 3 pushes the new forming bottom plate 2 onto the piston 7. At the same time, the original forming bottom plate 2 on the piston 7 and the formed part 8 thereon are pushed onto the ejection platform 4 by the new forming bottom plate 2.

[0040] Step 5: The AGV trolley 9 drives the ejection platform 4 to move to the removal position, and removes the formed part 8 on the forming base plate 2 by wire cutting.

[0041] When removing parts by wire cutting, first remove a bottom plate sub-component 24 together with the formed part 8 welded thereon from the bottom plate main body 23, then fix and position the bottom plate sub-component 24 on the wire cutting equipment, start the wire cutting equipment to cut and remove the formed part 8 on the bottom plate sub-component 24, and then replace the next bottom plate sub-component 24 to remove the formed part 8 by wire cutting. When all the bottom plate sub-components 24 are removed from the bottom plate main body 23 and all the formed parts 8 on them are removed by wire cutting, then reinstall all the bottom plate sub-components 24 on the bottom plate main body 23 and lock them in place.

Claims

1. A sinking cylinder plate changing device, comprising a forming chamber (1) and a forming cylinder, characterized in that: A cylinder driving device (5), a forming base plate (2), an ejection platform (3) and an ejection platform (4) are also provided. A hollow structure (11) is formed on the lower side of the forming chamber. The forming cylinder is installed on the lower side of the forming chamber so as to be able to move up and down. The cylinder driving device drives the forming cylinder to move up and down. When the forming cylinder rises to a specified height, the outer wall of the upper end of the cylinder body (6) of the forming cylinder can be sealed and inserted into the hollow structure on the lower side of the forming chamber. When the forming cylinder descends to a certain height, a discharge gap can be formed between the cylinder body of the forming cylinder and the lower side of the forming chamber. The forming base plate can be placed on the piston (7) of the forming cylinder. The ejection platform and the ejection platform can be located on both sides of the forming cylinder respectively. A push plate device is provided on the ejection platform. The push plate device can push the new forming base plate on the ejection platform to the piston surface of the forming cylinder that has descended to a certain height, and push the original forming base plate on the piston of the forming cylinder together with the formed part (8) thereon to the ejection platform.

2. The sinking cylinder plate changing device according to claim 1 is characterized in that: The push plate device is an active conveying roller (31) arranged at the upper end of the push-out platform, and the active conveying roller can actively convey a new forming bottom plate toward the forming cylinder. The height of the active conveying roller at the upper end of the push-out platform close to the forming cylinder is higher than the height of the upper surface of the piston of the forming cylinder; the upper end of the ejection platform is provided with an active conveying roller or a passive conveying roller (41), and the original forming bottom plate on the piston of the forming cylinder can be pushed by the new forming bottom plate onto the active conveying roller or the passive conveying roller at the upper end of the ejection platform.

3. The sinking cylinder plate changing device according to claim 1 or 2, characterized in that: The upper surface of the piston is provided with a linear guide mechanism extending in the direction of pushing out the new formed bottom plate by the push plate device on the push-out platform, and the formed bottom plate can slide into or out of the upper surface of the piston along the linear guide mechanism.

4. The sinking cylinder plate changing device according to claim 3 is characterized in that: A positioning pin (72) capable of being raised and lowered is also provided on the upper surface of the piston of the forming cylinder, and a recessed positioning groove (22) is also provided on the lower side of the forming base plate. The positioning pin can be inserted into the positioning groove of the forming base plate to stop and position the forming base plate.

5. The sinking cylinder plate changing device according to claim 1 or 2, characterized in that: The upper end of the ejector platform is provided with raised stoppers (42) on both sides perpendicular to the moving direction of the forming base plate, and the two side walls of the forming base plate entering the ejector platform perpendicular to its moving direction are stopped on the raised stoppers. The ejector platform is also provided with a forming base plate locking mechanism (43) and a forming base plate ejection mechanism (44). The forming base plate locking mechanism can fix and position the forming base plate that is completely entered on the ejector platform. The forming base plate ejection mechanism includes a push rod and a push rod driving device. A plurality of push rods are installed in the ejector platform so as to be able to move up and down. The upper end of the push rod can rise to lift the forming base plate on the ejector platform, and the push rod driving device drives the push rod to move up and down.

6. The sinking cylinder plate changing device according to claim 1 is characterized in that: An AGV trolley (9) is also provided, and the push-out platform and the ejection platform are respectively arranged on the AGV trolley.

7. The sinking cylinder plate changing device according to claim 1 is characterized in that: A slider (61) is fixedly provided on the outer wall of the cylinder body of the forming cylinder, a forming equipment frame (12) is fixedly provided below the forming chamber, the forming cylinder is located in the forming equipment frame, a vertically extending linear guide rail (121) is provided on the side wall of the forming equipment frame, the slider can slide up and down along the linear guide rail, the cylinder driving device comprises a servo motor and a lead screw (122), the servo motor is fixedly installed on the forming equipment frame, the lead screw can rotate in the circumferential direction and is installed on the inner wall of the forming equipment frame in an axially stopped manner, the lead screw is movably screwed to the slider on the outer wall of the cylinder body of the forming cylinder, and the upper ends of the ejection platform and the ejection platform facing the forming cylinder are respectively formed with horizontal extension parts, and the horizontal extension parts can cross the forming equipment frame and connect with the outer wall of the cylinder body of the forming cylinder.

8. The sinking cylinder plate changing device according to claim 1 is characterized in that: The forming bottom plate comprises a bottom plate body (23) and bottom plate sub-components (24), wherein a plurality of bottom plate sub-components are detachably fixedly mounted on the upper surface of the bottom plate body, and the upper side surfaces of the plurality of bottom plate sub-components are spliced ​​to form a forming surface for forming the formed piece.

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