Multi-cavity-die hydraulic rapid forming machine for packaging boxes

Abstract

The invention discloses a multi-cavity die hydraulic packaging box rapid forming machine which comprises a workbench, an upper die and a lower die, a lower die fixing base is fixedly connected to the center of the top of the workbench, stand columns are vertically and fixedly connected to the four corners of the top of the workbench, and a lifting plate is slidably connected to the surfaces of the stand columns; the bottom of the lifting plate is fixedly connected with a fixing plate through a connecting column, an adjusting column is vertically arranged on the surface of the fixing plate, a connecting base is arranged below the adjusting column, the bottom end of the adjusting column is slidably connected with a connecting bolt, the bottom end of the connecting bolt is in threaded connection with the top of the connecting base, and a pressure sensor is fixedly connected to the top of the connecting base. The bottom of the connecting base is fixedly connected with a mounting frame, and the upper mold is fixed to the bottom of the mounting frame. According to the multi-cavity-mold hydraulic type rapid forming machine for the packaging box, the problem that pressure cannot be independently adjusted through a traditional multi-cavity mold is solved, indentations are prevented from being left in the demolding process, and meanwhile the requirement for the strength of a workbench is lowered.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a multi-cavity mold hydraulic packaging box rapid prototyping machine. Background Art

[0002] Plastic packaging boxes have a wide range of uses due to their low cost, ease of production, and excellent moisture and waterproof properties. Among the most widely used plastic boxes, transparent plastic packaging boxes consume less resources than packaging boxes made of other materials, and allow the color and shape of the product to be more intuitively seen, making it easier to attract customers. However, in the production process of existing plastic packaging boxes, in order to improve processing efficiency, a multi-cavity mold structure is used. Pressure control during the molding process is crucial to ensuring the quality and dimensional accuracy of the packaging box. However, the existing multi-cavity mold structure cannot adjust the pressure of a single cavity mold. In addition, to facilitate demolding, most existing molds are equipped with a pin structure, which easily leaves indentations on the surface of the plastic packaging box, affecting its appearance. Existing hydraulic molding usually uses downward pressure, which puts a large pressure on the workbench. In order to prevent the workbench from being deformed by pressure, the thickness of the workbench is usually increased, making the entire machine bulky and inconvenient to transport and install. Summary of the Invention

[0003] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a multi-cavity hydraulic packaging box rapid prototyping machine, which solves the problem that traditional multi-cavity molds cannot adjust the pressure individually, avoids leaving indentations during demolding, and reduces the strength requirements for the workbench.

[0004] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-cavity mold hydraulic packaging box rapid prototyping machine, comprising a workbench, an upper mold and a lower mold, the top center of the workbench is fixedly connected to a lower mold fixing seat, the lower mold is provided with multiple and array-fixed on the top of the lower mold fixing seat, the four corners of the top of the workbench are vertically fixedly connected with columns, the surface of the columns is slidably connected to a lifting plate, the bottom of the lifting plate is fixedly connected to the fixing plate through a connecting column, the surface of the fixing plate is vertically provided with an adjusting column, the adjusting columns are provided in multiple and at the top center of the corresponding lower mold, a connecting seat is provided below the adjusting column, the bottom end of the adjusting column is slidably connected to a connecting bolt, the bottom end of the connecting bolt is threadedly connected to the top of the connecting seat, the top of the connecting seat is fixedly connected to a pressure sensor, and the bottom of the connecting seat is fixedly connected to an installation The top of the mold is provided with a sealing hole adapted to fit the sealing rod, and a sealing ring is provided between the surface of the mold and the inner wall of the mold. The top of the mold is fixedly connected with a sealing end cover by bolts, and the surface of the sealing end cover is provided with a connecting pipe connected to the interior of the upper mold frame. The connecting pipe makes the interior of the upper mold frame in a positive or negative pressure state. The two sides of the lower mold fixing seat are slidably connected with the connecting frame, and the two sides of the top of the fixing plate are fixedly connected with inclined blocks. When the upper mold contacts the lower mold, the connecting frames move toward each other and contact the inclined blocks, so that the fixing plate is subjected to downward pressure.

[0005] Preferably, the adjusting column includes a threaded sleeve, which is threadedly connected to the fixed plate, the center of the threaded sleeve is slidably connected to a moving rod, the top of the moving rod is fixedly connected to a first limit block, the surface of the moving rod and located below the threaded sleeve are fixedly connected to a second limit block and a third limit block in sequence, the surface of the threaded sleeve and near the top position is threadedly connected to a locking nut, and the bottom of the threaded sleeve is fixedly connected to a push block.

[0006] Preferably, the third limit block is located at the bottom of the sealing end cover, a return spring is provided between the top of the sealing end cover and the second limit block, the top of the sealing end cover is provided with a through hole adapted to the moving rod, and a sealing rubber ring adapted to the moving rod is provided in the through hole.

[0007] Preferably, T-shaped slots are provided on both sides of the lower mold fixing seat, one side of the connecting frame is slidably connected to the T-shaped slots, and a side of the connecting frame close to the inclined block is provided with an inclined surface.

[0008] Preferably, support frames are fixedly connected to both sides of the top of the workbench, and a second actuator that drives the connection frame to slide is horizontally fixedly connected to one side of the support frame. A connecting block is also provided between one side of the support frame and the column, and a display that displays the pressure sensor value is provided on the surface of one side of the support frame.

[0009] Preferably, support legs are fixedly connected to the four corners of the bottom of the workbench, a top plate is fixedly connected to the top of the column, and a hydraulic cylinder that drives the lifting plate to move up and down is vertically fixedly connected to the center of the top plate.

[0010] Preferably, a buffer spring is provided between the bottom of the connecting bolt and one side of the adjusting column, guide grooves are provided on both sides of the upper mold, and the inner wall of the upper mold frame is fixedly connected to a guide column that is slidably connected to the guide groove.

[0011] Preferably, the sealing rod comprises a round block, a circumferential surface of the round block is provided with a ventilation groove, the top of the round block is fixedly connected to a connecting rod, and the bottom of the round block is fixedly connected to a sealing plug.

[0012] Preferably, the sealing plug is in the shape of an inverted truncated cone, the sealing plug is sealed and connected to the bottom of the sealing hole, the round block is slidably connected to the sealing hole, and the ventilation groove is a through groove along the axial direction of the round block.

[0013] Preferably, the first actuator and the second actuator are servo hydraulic cylinders.

[0014] (3) Beneficial effects The present invention provides a multi-cavity hydraulic packaging box rapid prototyping machine. It has the following beneficial effects: (1) By setting an adjustment column on the top of each upper mold, the pressure of each upper mold can be accurately adjusted by rotating the adjustment column in conjunction with a pressure sensor, thereby ensuring the consistency of quality and dimensional accuracy of products in different cavity molds and improving the overall quality of the product.

[0015] (2) A connecting pipe connected to the interior of the upper mold frame is set on the top of the sealing end cover. The connecting pipe is connected to the air compressor and vacuum machine through a solenoid valve. By moving the sealing rod, the packaging box is sucked up from the bottom to demould using negative pressure, and then separated from the upper mold cavity by positive pressure. This avoids the indentation on the surface of the plastic packaging box caused by the traditional ejector structure during the demoulding process, and significantly improves the aesthetics of the product.

[0016] (3) By setting sliding connection frames on both sides of the lower mold fixing seat and setting inclined blocks on both sides of the top of the fixed plate, the connection frames move towards each other and contact with the inclined blocks, so that the fixed plate is subjected to downward pressure, thereby realizing the compression molding of the packaging box, avoiding the problem of the traditional workbench being subjected to huge pressure, and there is no need to excessively increase the thickness of the workbench, making the entire mechanical structure lighter and easier to transport and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection between the support frame and the connection frame of the present invention; Figure 4 This is a schematic structural diagram of the connection between the adjustment column and the upper mold of the present invention; Figure 5 Schematic diagram of the connection between the upper mold and the upper mold frame of the present invention; Figure 6 This is a schematic structural diagram of the connection between the sealing rod and the upper mold of the present invention; Figure 7 Schematic diagram of the structure of the sealing rod of the present invention.

[0018] In the figure: 1- workbench, 2- support leg, 3- lower die fixing seat, 4- lower die, 5- column, 6- lifting plate, 7- connecting column, 8- fixing plate, 9- adjusting column, 91- threaded sleeve, 92- moving rod, 93- first limit block, 94- second limit block, 95- third limit block, 96- locking nut, 97- push block, 10- connecting seat, 11- connecting bolt, 12- pressure sensor, 13- mounting bracket, 14- upper die, 15- first actuator, 16- mounting Plate, 17-sealing rod, 171-round block, 172-connecting rod, 173-sealing plug, 174-vent groove, 18-upper mold frame, 19-sealing ring, 20-sealing end cover, 21-connecting pipe, 22-connecting frame, 23-oblique block, 24-support frame, 25-second actuator, 26-connecting block, 27-return spring, 28-top plate, 29-hydraulic cylinder, 30-T-type slide, 31-buffer spring, 32-guide groove, 33-sealing hole, 34-display. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-7 The present invention provides a technical solution: a multi-cavity mold hydraulic packaging box rapid prototyping machine, comprising a workbench 1, an upper mold 14 and a lower mold 4, wherein the upper mold 14 and the lower mold 4 are both provided with cooling channels and heating coils, support legs 2 are fixedly connected at the four corners of the bottom of the workbench 1, a lower mold fixing seat 3 is fixedly connected to the center of the top of the workbench 1, multiple lower molds 4 are provided and fixed in an array on the top of the lower mold fixing seat 3, columns 5 are vertically fixedly connected at the four corners of the top of the workbench 1, a lifting plate 6 is slidably connected to the surface of the column 5, a top plate 28 is fixedly connected to the top of the column 5, and a hydraulic cylinder 29 for driving the lifting plate 6 to move up and down is vertically fixedly connected to the center of the top plate 28.

[0021] The bottom of the lifting plate 6 is fixedly connected to the fixed plate 8 through the connecting column 7. The surface of the fixed plate 8 is vertically provided with an adjusting column 9. There are multiple adjusting columns 9 and they are located in the top center of the corresponding lower mold 4. A connecting seat 10 is provided below the adjusting column 9. The bottom end of the adjusting column 9 is slidably connected to the connecting bolt 11. The bottom end of the connecting bolt 11 is threadedly connected to the top of the connecting seat 10. A buffer spring 31 is provided between the bottom of the connecting bolt 11 and one side of the adjusting column 9. The top of the connecting seat 10 is fixedly connected to the pressure sensor 12. The sliding connection between the connecting bolt 11 and the adjusting column 9 ensures that the pressure on the pressure sensor 12 changes. After the bottom of the connecting seat 10 is subjected to upward pressure, the pressure sensor 12 can display the current pressure. When the position of the fixed plate 8 remains unchanged, the position of the bottom end of the adjusting column 9 is changed by adjusting the adjusting column 9, thereby realizing the adjustment of the pressure of the connecting seat 10.

[0022] The bottom of the connecting seat 10 is fixedly connected to the mounting frame 13, and the upper mold 14 is fixed to the bottom of the mounting frame 13 and can be fixed with bolts. In this way, different upper molds can be replaced by removing the bolts to realize the processing of different types of plastic packaging boxes and improve adaptability. The bottom of the connecting seat 10 is also provided with a mounting plate 16. The bottom of the connecting seat 10 is fixedly connected to the first actuator 15 that drives the mounting plate 16 to move vertically. The bottom of the mounting plate 16 is fixedly connected to the sealing rod 17. The top of the upper mold 14 is provided with a sealing hole 33 adapted to the sealing rod 17. The sealing rod 17 includes a round block 171. The circumferential surface of the round block 171 is provided with a ventilation groove 174. The top of the round block 171 is fixedly connected to the connecting rod 172. The bottom of the round block 171 is fixedly connected to the sealing rod 172. Plug 173, the sealing plug 173 is in the shape of an inverted frustum, and the sealing plug 173 is sealed and connected to the bottom of the sealing hole 33. After the sealing plug 173 is sealed with the sealing hole 33, the bottom of the sealing plug 173 and the top of the inner wall of the upper mold 14 are located in the same plane, avoiding leaving a seam protrusion on the surface of the packaging box. The round block 171 is slidingly connected to the sealing hole 33, and the ventilation groove 174 is a through groove along the axial direction of the round block 171. The setting of the sealing plug 173 prevents plastic from entering the sealing hole 33 during compression molding.

[0023] The surfaces of the multiple upper molds 14 are covered with a common upper mold frame 18. A sealing ring 19 is provided between the surface of the upper mold 14 and the inner wall of the upper mold frame 18 to ensure the closed state of the interior of the upper mold frame 18. The top of the upper mold frame 18 is fixedly connected with a sealing end cover 20 by bolts. After the upper mold 14 and the mounting frame 13 are fixedly connected by bolts, the upper mold frame 18 is inserted upward from the bottom of the upper mold 14 so that the side wall of the upper mold 14 is slidably connected to the upper mold frame 18. Subsequently, the upper mold frame 18 is fixed to the sealing end cover 20 by bolts. The surface of the sealing end cover 20 is provided with a connecting pipe communicating with the interior of the upper mold frame 18 21. One end of the connecting pipe 21 can be connected to the joints, one of which is connected to the vacuum machine, and the other is connected to the air compressor. Both joints are equipped with corresponding solenoid valves. By opening the corresponding solenoid valves, the interior of the upper mold frame 18 is in a positive pressure or negative pressure state through the connecting pipe 21. The negative pressure sucks the packaging box from the bottom to demould, and the positive pressure realizes separation from the upper mold cavity, avoiding the indentation on the surface of the plastic packaging box caused by the traditional ejector structure during the demoulding process. Before compression molding, the upper mold and the lower mold are sealed and connected. The internal negative pressure is used to avoid the existence of air inside the plastic, ensuring that there are no air holes inside the processed packaging box.

[0024] The two sides of the lower mold fixing seat 3 are slidably connected with a connecting frame 22, and the two sides of the top of the fixed plate 8 are fixedly connected with an inclined block 23. When the upper mold 14 contacts the lower mold 4, the connecting frame 22 moves toward each other and contacts the inclined block 23, so that the fixed plate 8 is subjected to downward pressure, thereby realizing compression molding of the plastic packaging box.

[0025] The adjusting column 9 includes a threaded sleeve 91, which is threadedly connected to the fixing plate 8. A hexagonal block is provided on the top of the threaded sleeve 91 to facilitate the rotation adjustment of the threaded sleeve 91. The center of the threaded sleeve 91 is slidably connected to a moving rod 92. The bottom end of the moving rod 92 is fixedly connected to a round block for installing the connecting bolt 11. The sliding direction of the moving rod 92 is the axial direction of the threaded sleeve 91. The top of the moving rod 92 is fixedly connected to a first limit block 93. The surface of the moving rod 92 and the bottom of the threaded sleeve 91 are fixedly connected to the second limit block. The positioning block 94 and the third limiting block 95, the surface of the threaded sleeve 91 and near the top position are threadedly connected with a locking nut 96, the bottom of the threaded sleeve 91 is fixedly connected with a push block 97, and the push block 97 is used to increase the contact area with the second limiting block 94. The third limiting block 95 is located at the bottom of the sealing end cover 20, and a return spring 27 is arranged between the top of the sealing end cover 20 and the second limiting block 94. The top of the sealing end cover 20 is provided with a through hole adapted to the moving rod 92, and a sealing rubber ring adapted to the moving rod 92 is provided in the through hole. During compression molding, the fixed plate 8 moves downward, and the pressure is transmitted to the moving rod 92 through the push block 97 and the second limit block 94, thereby transmitting the pressure to the connecting seat 10 through the pressure sensor 12, and finally to the upper mold 14 to realize compression molding; during separation, the fixed plate 8 moves upward, and drives the moving rod 92 to move upward through the first limit block 93, thereby driving the upper mold 14 to separate from the lower mold 4. During the upward movement of the moving rod 92, the return spring 27 ensures that the sealing end cover 20 and the second limit block 94 are in a tensioned state to avoid loosening. At the same time, the buffer spring 31 avoids the collision between the moving rod 92 and the connecting bolt 11 and makes noise.

[0026] T-shaped slots 30 are provided on both sides of the lower mold fixing seat 3, and one side of the connecting frame 22 is slidably connected to the T-shaped slot 30. A slope is provided on the side of the connecting frame 22 close to the inclined block 23, and the inclination angle of the inclined block 23 is 15-25°. Through the T-shaped slot 30, the upper mold 14 and the lower mold 4 are formed into a whole through the connecting frame 22. During the compression process, the pressure on the workbench 1 remains unchanged, avoiding the thickening design of the workbench 1.

[0027] Support frames 24 are fixedly connected to both sides of the top of the workbench 1. A second actuator 25, which drives the sliding connection frame 22, is horizontally fixedly connected to one side of the support frame 24. A connecting block 26 is also provided between one side of the support frame 24 and the column 5, which improves the stability of the support frame 24. A display 34 is provided on the surface of one side of the support frame 24 to display the value of the pressure sensor 12. This display 34 facilitates adjustment of the corresponding pressure between the upper and lower molds.

[0028] Guide grooves 32 are provided on both sides of the upper mold 14 , and guide posts slidably connected to the guide grooves 32 are fixedly connected to the inner wall of the upper mold frame 18 , thereby ensuring the stable sliding of the upper mold 14 .

[0029] The first actuator 15 and the second actuator 25 are servo hydraulic cylinders, which are connected to a servo solenoid valve, which is connected to a controller. The controller controls the opening of the servo solenoid valve corresponding to the second actuator 25, thereby controlling the flow and pressure of the hydraulic oil, so that the value of the pressure sensor 12 approaches the target value.

[0030] Take the manufacture of 2mm thick food grade PP transparent packaging box as an example, Step 1: Initialize the mold clamping pressure adjustment. The hydraulic cylinder 29 drives the lifting plate 6 downward, and the upper mold 14 contacts the lower mold 4. The second actuator 25 pushes the connecting frame 22 to slide along the T-shaped slide 30. The inclined surface of the connecting frame 22 presses the inclined block 23 to generate a vertical clamping force. The pressure corresponding to each upper mold is observed on the display 34. If the pressure is not within the preset value, the vertical position of the threaded sleeve 91 is adjusted by rotating it. After adjusting the pressure to the preset value, the position of the threaded sleeve 91 is fixed by the lock nut 96. Step 2: Compression molding: After the upper mold 14 is separated from the lower mold 4, the plastic raw material is placed in the lower mold 4, and then the mold is closed, vacuumed to -80kPa, heated to 190℃, and pressurized for 8 seconds, and then cooled to 60-80℃; Step 3: Pneumatic demoulding, the first actuator 15 drives the sealing rod 17 to move upward, the sealing plug 173 disengages from the sealing hole 33, the vent groove 174 is connected to the inside of the upper mold, the connecting pipe 21 starts the negative pressure of -50kPa, the product is adsorbed to the upper mold cavity, the upper mold 14 moves upward under the drive of the hydraulic cylinder 29, and then switches to positive pressure, 0.3-0.5MPa, and the product is blown off.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-cavity hydraulic packaging box rapid prototyping machine, comprising a workbench (1), an upper mold (14) and a lower mold (4), characterized in that: The center of the top of the workbench (1) is fixedly connected to a lower mold fixing seat (3), a plurality of lower molds (4) are provided and fixed in an array on the top of the lower mold fixing seat (3), and vertically fixedly connected to columns (5) at the four corners of the top of the workbench (1), the surface of the column (5) is slidably connected to a lifting plate (6), the bottom of the lifting plate (6) is fixedly connected to a fixing plate (8) through a connecting column (7), and the surface of the fixing plate (8) is vertically provided with an adjusting column (9), and the adjusting column (9) is provided in plurality and is located at the corresponding lower mold (4). ), a connecting seat (10) is provided below the adjusting column (9), the bottom end of the adjusting column (9) is slidably connected to a connecting bolt (11), the bottom end of the connecting bolt (11) is threadedly connected to the top of the connecting seat (10), the top of the connecting seat (10) is fixedly connected to a pressure sensor (12), the bottom of the connecting seat (10) is fixedly connected to a mounting frame (13), the upper mold (14) is fixed to the bottom of the mounting frame (13), and the bottom of the connecting seat (10) is also provided with a mounting plate (16). The bottom of the connecting seat (10) is fixedly connected to a first actuator (15) for driving the mounting plate (16) to move vertically, the bottom of the mounting plate (16) is fixedly connected to a sealing rod (17), the top of the upper mold (14) is provided with a sealing hole (33) adapted to the sealing rod (17), the surface sleeves of the plurality of upper molds (14) are provided with an upper mold frame (18), a sealing ring (19) is provided between the surface of the upper mold (14) and the inner wall of the upper mold frame (18), and the top of the upper mold frame (18) is fixedly connected to a sealing ring by bolts. The sealing end cover (20) is provided with a connecting pipe (21) on the surface of the sealing end cover (20) which is connected to the interior of the upper mold frame (18). The interior of the upper mold frame (18) is in a positive pressure or negative pressure state through the connecting pipe (21). The two sides of the lower mold fixing seat (3) are slidably connected with connecting frames (22). The two sides of the top of the fixed plate (8) are fixedly connected with inclined blocks (23). When the upper mold (14) contacts the lower mold (4), the connecting frames (22) move toward each other and contact the inclined blocks (23), so that the fixed plate (8) is subjected to downward pressure.

2. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: The adjusting column (9) includes a threaded sleeve (91), the threaded sleeve (91) is threadedly connected to the fixed plate (8), the center of the threaded sleeve (91) is slidably connected to a moving rod (92), the top of the moving rod (92) is fixedly connected to a first limit block (93), the surface of the moving rod (92) and located below the threaded sleeve (91) are fixedly connected to a second limit block (94) and a third limit block (95) in sequence, the surface of the threaded sleeve (91) and near the top are threadedly connected to a locking nut (96), and the bottom of the threaded sleeve (91) is fixedly connected to a push block (97).

3. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 2, characterized in that: The third limiting block (95) is located at the bottom of the sealing end cover (20), and a return spring (27) is provided between the top of the sealing end cover (20) and the second limiting block (94). The top of the sealing end cover (20) is provided with a through hole adapted to the moving rod (92), and a sealing rubber ring adapted to the moving rod (92) is provided in the through hole.

4. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: T-shaped slide grooves (30) are provided on both sides of the lower mold fixing seat (3), one side of the connecting frame (22) is slidably connected to the T-shaped slide groove (30), and a side of the connecting frame (22) close to the inclined block (23) is provided with an inclined surface.

5. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: Support frames (24) are fixedly connected to both sides of the top of the workbench (1), a second actuator (25) for driving the connecting frame (22) to slide is horizontally fixedly connected to one side of the support frame (24), a connecting block (26) is further provided between one side of the support frame (24) and the column (5), and a display (34) for displaying the value of the pressure sensor (12) is provided on the surface of one side of the support frame (24).

6. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: The four corners of the bottom of the workbench (1) are fixedly connected to support legs (2), the top of the column (5) is fixedly connected to a top plate (28), and the center of the top plate (28) is vertically fixedly connected to a hydraulic cylinder (29) that drives the lifting plate (6) to move up and down.

7. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: A buffer spring (31) is provided between the bottom of the connecting bolt (11) and one side of the adjusting column (9), guide grooves (32) are provided on both sides of the upper mold (14), and a guide column slidably connected to the guide groove (32) is fixedly connected to the inner wall of the upper mold frame (18).

8. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 1, characterized in that: The sealing rod (17) comprises a round block (171), a circumferential surface of the round block (171) is provided with a ventilation groove (174), the top of the round block (171) is fixedly connected to a connecting rod (172), and the bottom of the round block (171) is fixedly connected to a sealing plug (173).

9. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 8, characterized in that: The sealing plug (173) is in the shape of an inverted truncated cone. The sealing plug (173) is sealed and connected to the bottom of the sealing hole (33). The round block (171) is slidably connected to the sealing hole (33). The ventilation groove (174) is a through groove along the axial direction of the round block (171).

10. The multi-cavity hydraulic packaging box rapid prototyping machine according to claim 5, characterized in that: The first actuator (15) and the second actuator (25) are servo hydraulic cylinders.

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