Compression molding equipment for plastic product production

Abstract

The present invention discloses a compression molding device for plastic product production, including a double I-shaped hollow table. At the central position inside the double I-shaped hollow table, a U-shaped disc frame is installed. And at the central position inside the U-shaped disc frame, a vertical shaft is rotatably installed. The top of the U-shaped disc frame is fixed with a bearing bracket, and inside the bearing bracket, a single-cylinder double-station compression molding module is installed. At the movable end of the single-cylinder double-station compression molding module, two symmetrical upper compression molding molds are installed. The top of the vertical shaft penetrates to the outside of the U-shaped disc frame and is fixed with a turntable. The present invention enables the molds at two stations to simultaneously perform operations such as blanking, heating, injection molding, and cooling. Compared with the traditional single-station structure, the settings of structures such as the single-cylinder double-station compression molding module, the turntable, and the bevel gear transmission mechanism can complete twice the production volume within the same time, and its parallel processing ability can effectively improve the utilization rate and production efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic product processing equipment, and specifically to a compression molding device for plastic product production. Background Art

[0002] The compression molding equipment in plastic product production is a key production tool, and its main functions include melting plastic raw materials, filling molds through high-pressure injection, and finally forming plastic products. The working process of the compression molding equipment first involves heating plastic particles to a molten state to make them have sufficient fluidity for injection into the mold. The molten plastic is injected into the mold under high pressure to ensure uniform filling in the mold and avoid bubbles and defects. Subsequently, through the cooling process, the plastic solidifies in the mold to form the final product. This type of compression molding equipment consists of multiple parts. Among them, the frame serves as the basic structure of the equipment, providing stable support to ensure the safety and precision of the equipment during operation. The injection system is the core part, including a screw, a heating barrel, and an injection cylinder, which are responsible for melting plastic raw materials and injecting them into the mold. The screw pushes the plastic into the heating barrel by rotation, and the heating barrel heats the plastic to the required temperature through a heater. The injection cylinder stores the molten plastic and injects it into the mold under high pressure. The mold is a key component for plastic molding, usually made of wear-resistant materials to withstand high temperature and high pressure, and directly affects the shape and quality of the product;

[0003] As disclosed in a compression molding device for plastic product production with the authorization announcement number CN113386294B, it includes a machine body. The middle part of the machine body has an installation space, and the installation space has a top wall and a bottom wall; an upper mold assembly, the upper mold assembly includes a driving member and an upper template. The driving member is fixedly arranged on the top wall of the installation space, and the upper template is installed at the output end of the driving member. The driving member can drive the upper template to move vertically; a lower mold assembly, the lower mold assembly includes a rotating disk and a plurality of lower templates. The rotating disk is horizontally arranged and rotatably installed on the bottom wall of the installation space. By arranging a plurality of lower templates, the plurality of lower templates can continuously cooperate with the upper template to complete the compression molding action. In a set of equipment, the compression molding action and the loading and unloading action of plastic products can be carried out simultaneously. However, in the process of the station rotation and transformation of the lower template, the rotation action of the lower template is synchronized with the telescopic action of the hydraulic cylinder, which results in a single-station structure. Even if it can make the compression molding action and the loading and unloading action of plastic products synchronous, it can only complete the pressing process of one workpiece, and the preparation, pressing, and cooling processes of the next workpiece must wait until the previous workpiece is completely finished. The waiting time in this process increases the production cycle of plastic products. Summary of the Invention

[0004] The purpose of the present invention is to provide a compression molding device for the production of plastic products. A single-cylinder double-station compression molding module is provided. When the single-cylinder double-station compression molding module performs a downward movement, the vertical shaft is driven to rotate through a gear-rack transmission structure, a belt-wheel drive structure, and a bevel gear transmission mechanism. The lower compression mold monomer is rotated to the lower part of the single-cylinder double-station compression molding module by the vertical shaft and the turntable for mold closing. After the single-cylinder double-station compression molding module moves upward and resets, the lower compression mold monomer also resets synchronously, so that the staff can perform loading and unloading operations, thereby solving the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A compression molding device for the production of plastic products, including:

[0006] A double-I-shaped hollow table, at the central position inside the double-I-shaped hollow table, a U-shaped disc frame is installed, and at the central position inside the U-shaped disc frame, a vertical shaft is rotatably installed. At the top of the U-shaped disc frame, a supporting bracket is fixed, and inside the supporting bracket, a single-cylinder double-station compression molding module is installed. At the movable end of the single-cylinder double-station compression molding module, two symmetric upper compression molds are installed. The top of the vertical shaft penetrates to the outside of the U-shaped disc frame and is fixed with a turntable, and at the top of the turntable, two symmetric lower compression mold monomers that can slide up and down in the Z-axis direction are installed;

[0007] A gear-rack transmission structure, which is installed at the bottom end of the upper compression mold. Inside the U-shaped disc frame, a bevel gear transmission mechanism for power connection with the vertical shaft is provided. Between the gear-rack transmission structure and the bevel gear transmission mechanism, a belt-wheel drive structure for power transmission is installed;

[0008] An arc-shaped guide, which is symmetrically installed on the front and rear sides of the top of the U-shaped disc frame and is used to force the lower compression mold monomer to move up actively. At the front and rear sides of the bottom of the supporting bracket, a double-axis blanking unit for picking up the formed workpieces inside the lower compression mold monomer is installed. On the outer wall of one side of the double-I-shaped hollow table, a control panel electrically connected to the input ends of the single-cylinder double-station compression molding module and the double-axis blanking unit is installed.

[0009] Preferably, the supporting bracket includes a lower flat plate fixed to the top of the double-I-shaped hollow table and steel columns installed at the corner positions at the top of the lower flat plate. At the top of the four steel columns, an upper platform is installed. At the central position of the bottom end of the lower flat plate, a circular through groove equal to the outer diameter of the turntable is provided.

[0010] Preferably, the single-cylinder double-station compression molding module includes a hydraulic cylinder installed on one side of the top of the supporting bracket, columns fixed at the corner positions at the bottom of the supporting bracket, a double template slidably installed on the four columns, and air springs symmetrically installed on both sides of the bottom end of the double template. The top end of the upper compression mold is fixedly connected to the bottom end of the air spring.

[0011] Preferably, guide columns are installed at the corner positions at the top of the upper compression mold, and the tops of the guide columns extend into the interior of the double template.

[0012] Preferably, the gear-rack transmission structure includes an inclined rack fixed on the outer wall of one side of the upper compression mold, a short shaft rotatably installed on the inner wall of one side of the double I-shaped hollow table, and a driven bevel gear disk installed at one end of the short shaft. The bottom end of the inclined rack extends into the interior of the double I-shaped hollow table and meshes with the driven bevel gear disk.

[0013] Preferably, the bevel gear transmission mechanism includes a horizontal shaft rotatably installed on the inner wall of one side of the double I-shaped hollow table, and a bevel gear transmission structure installed at one end of the horizontal shaft for driving the vertical shaft to rotate. Power connection is maintained between the horizontal shaft and the short shaft through a belt pulley drive structure.

[0014] Preferably, the bevel gear transmission structure includes a driving bevel gear and a driven bevel gear fixed on the opposite ends of the horizontal shaft and the vertical shaft respectively, and the driving bevel gear and the driven bevel gear mesh with each other.

[0015] Preferably, the belt pulley drive structure includes track wheels fixed on the same end of the short shaft and the horizontal shaft, and a multi-wedge belt is wound between the two track wheels.

[0016] Preferably, the lower compression mold unit includes a limiting cylinder fixed at the bottom end of the turntable, a sliding column slidably installed inside the limiting cylinder, and a lower compression mold fixed at the top end of the sliding column. A roller is rotatably installed at the bottom end of the sliding column, and the roller is used for rolling contact with the arc-shaped guide path. Straight mouth chutes are provided on the outer walls on both sides of the limiting cylinder, and columnar protrusions are integrally formed on the outer walls on both sides of the sliding column, and one end of the columnar protrusion penetrates to the outside of the straight mouth chute.

[0017] Preferably, an arc-shaped support plate is installed at the bottom of the support bracket below the upper compression mold, and the upper surface of the arc-shaped support plate is in sliding contact with the lower surface of the lower compression mold.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The compression molding equipment for plastic product production is provided with structures such as a turntable and a single-cylinder double-station compression molding module that cooperate with each other. During the compression molding operation, the molds at the two stations can simultaneously perform blanking, heating, injection molding, and cooling operations. Compared with the traditional single-station structure, the settings of the single-cylinder double-station compression molding module, turntable, bevel gear transmission mechanism, etc. can complete twice the production volume in the same time. Its parallel processing ability greatly improves the utilization rate and production efficiency of the equipment, and the vertical shaft and the turntable enable the lower compression mold unit to quickly transfer to the corresponding position below the station, which not only improves the speed of mold switching and transposition, but also reduces the non-production time during the production process, thereby increasing the effective production time. Description of the Drawings

[0019] Figure 1 Schematic of the three-dimensional structure of the present invention Figure 1 ;

[0020] Figure 2 Schematic of the three-dimensional structure of the present invention Figure 2 ;

[0021] Figure 3 Schematic front view structure diagram of the present invention;

[0022] Figure 4 Schematic of the three-dimensional structure of the present invention Figure 3 ;

[0023] Figure 5 Schematic of the three-dimensional structure of the double I-shaped hollow platform in the second embodiment of the present invention Figure 1 ;

[0024] Figure 6 Schematic of the three-dimensional structure of the double I-shaped hollow platform in the second embodiment of the present invention Figure 2 ;

[0025] Figure 7 Schematic of the three-dimensional structure of the U-shaped disc rack in the third embodiment of the present invention Figure 1 ;

[0026] Figure 8 Schematic of the three-dimensional structure of the U-shaped disc rack in the third embodiment of the present invention Figure 2 .

[0027] In the figure: 1. Double I-shaped hollow platform; 2. U-shaped disc rack; 3. Bracket; 4. Single-cylinder double-station compression molding module; 401. Hydraulic cylinder; 402. Column; 403. Double template; 404. Air spring; 405. Upper compression molding die; 406. Guide post; 5. Vertical shaft; 6. Bevel gear transmission mechanism; 601. Horizontal shaft; 602. Bevel gear transmission structure; 7. Rack and pinion transmission structure; 701. Inclined rack; 702. Driven bevel gear disc; 8. Belt drive structure; 9. Turntable; 10. Lower compression molding die monomer; 1001. Limit cylinder; 1002. Slide column; 1003. Roller; 1004. Lower compression molding die; 11. Arc-shaped stopway; 12. Double-axis blanking unit; 13. Control panel. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1, consisting of Figures 1 to 4Given that, the present invention includes a double I-shaped hollow table 1. At the central position inside the double I-shaped hollow table 1, a U-shaped disc rack 2 is installed. And at the central position inside the U-shaped disc rack 2, a vertical shaft 5 is rotatably installed. At the top end of the U-shaped disc rack 2, a support bracket 3 is fixed. And inside the support bracket 3, a single-cylinder double-station compression molding module 4 is installed. At the movable end of the single-cylinder double-station compression molding module 4, two symmetrical upper compression molding dies 405 are installed. The top end of the vertical shaft 5 penetrates to the outside of the U-shaped disc rack 2 and is fixed with a turntable 9. And at the top end of the turntable 9, two symmetrical lower compression molding die monomers 10 that can slide up and down in the Z-axis direction are installed;

[0030] A gear-rack transmission structure 7 is installed at the bottom end of the upper compression molding die 405. The downward movement of the upper compression molding die 405 will force the gear-rack transmission structure 7 to work. Inside the U-shaped disc rack 2, a bevel gear transmission mechanism 6 for power connection with the vertical shaft 5 is arranged. Between the gear-rack transmission structure 7 and the bevel gear transmission mechanism 6, a belt drive structure 8 for power transmission is installed. The gear-rack transmission structure 7 and the belt drive structure 8 drive the bevel gear transmission mechanism 6 to act until this part of the power is transmitted to the vertical shaft 5 to realize its rotation;

[0031] Arc-shaped stoppers 11 are symmetrically installed on the front and rear sides of the top end of the U-shaped disc rack 2 and are used to force the lower compression molding die monomers 10 to move up actively. On the front and rear sides of the bottom of the support bracket 3, a double-axis blanking unit 12 for picking up the formed workpieces inside the lower compression molding die monomers 10 is installed. On the outer wall of one side of the double I-shaped hollow table 1, a control panel 13 electrically connected to the input ends of the single-cylinder double-station compression molding module 4 and the double-axis blanking unit 12 is installed;

[0032] The support bracket 3 includes a lower flat plate fixed to the top end of the double I-shaped hollow table 1 and steel columns installed at the corner positions at the top end of the lower flat plate. At the top ends of the four steel columns, an upper platform is installed. At the central position at the bottom end of the lower flat plate, a circular through groove with the same outer diameter as the turntable 9 is provided. The circular through groove is used to assist the turntable 9 to rotate self and keep its movement stable;

[0033] The double I-shaped hollow table 1 is the basic support structure of the single-cylinder double-station compression molding module 4. It provides a stable working platform, enabling the mold to be accurately positioned and moved, and being able to bear the weight and pressure of the mold; the gear-rack transmission structure 7, the belt drive structure 8, and the bevel gear transmission mechanism 6 transmit power to the turntable 9 and the lower compression molding die monomers 10 through mechanical transmission to realize the rotation and positioning of the lower die.

[0034] Embodiment 2, on the basis of Embodiment 1, from Figure 5 and Figure 6Given that the single-cylinder double-station compression molding module 4 includes a hydraulic cylinder 401 installed on one side of the top end of the support bracket 3, columns 402 fixed at the corner positions of the bottom of the support bracket 3, a double template 403 slidably installed on the four columns 402, and air springs 404 symmetrically installed on both sides of the bottom end of the double template 403. The top end of the upper compression mold 405 is fixedly connected to the bottom end of the air spring 404. When the single-cylinder double-station compression molding module 4 operates, the hydraulic cylinder 401 drives the double template 403 and the upper compression mold 405 to move downward together. During this process, the hydraulic pressure provided by the external hydraulic system is used to drive the up and down movement of the hydraulic cylinder 401 and the mold, that is, the upper compression mold 405 moves towards the lower compression mold monomer 10 until the lower compression mold monomer 10 rotates to the exact bottom of the upper compression mold 405 and closes with the upper compression mold 405.

[0035] Guide columns 406 are installed at the corner positions of the top end of the upper compression mold 405. The top ends of the guide columns 406 extend into the interior of the double template 403. The columns 402 are the vertical guiding structures for the double template 403 and the columns 402 to ensure the stable movement of the upper compression mold 405. The air springs 404 provide additional pressure and buffering effects, and provide the upward margin for the upper compression mold 405 together. The air springs 404 can slow down the downward speed of the upper compression mold 405 and help the mold quickly rebound after the pressure is released, thus ensuring the surface quality of the molded product.

[0036] Embodiment 3, on the basis of Embodiment 2, consists of Figure 7 and Figure 8 Given that the gear-rack transmission structure 7 includes an inclined rack 701 fixed on the outer wall of one side of the upper compression mold 405, a short shaft rotatably installed on the inner wall of one side of the double I-shaped hollow table 1, and a driven bevel gear disk 702 installed at one end of the short shaft. The bottom end of the inclined rack 701 extends into the interior of the double I-shaped hollow table 1 and meshes with the driven bevel gear disk 702. The bevel gear transmission mechanism 6 includes a horizontal shaft 601 rotatably installed on the inner wall of one side of the double I-shaped hollow table 1, and a bevel gear transmission structure 602 installed at one end of the horizontal shaft 601 for driving the vertical shaft 5 to rotate. The power connection between the horizontal shaft 601 and the short shaft is maintained through a belt drive structure 8.

[0037] The bevel gear transmission structure 602 includes a driving bevel gear and a driven bevel gear fixed on the opposite end parts of the horizontal shaft 601 and the vertical shaft 5. The driving bevel gear and the driven bevel gear mesh with each other. During the process that the single-cylinder double-station compression molding module 4 drives the upper compression molding die 405 to move downward, the upper compression molding die 405 drives the inclined rack 701 to move downward. Then, the inclined rack 701 forces the driven bevel gear disk 702 and the short shaft to rotate. At this time, the rotational power of the short shaft is transmitted to the horizontal shaft 601 through the belt pulley driving structure 8. Furthermore, the horizontal shaft 601 drives the vertical shaft 5 to rotate through the bevel gear transmission structure 602. Due to the rotational movements of the vertical shaft 5 and the turntable 9, the lower compression molding die unit 10 is switched to directly below the upper compression molding die 405 and is clamped with the upper compression molding die 405;

[0038] The belt pulley driving structure 8 includes track wheels fixed on the same end part of the short shaft and the horizontal shaft 601, and a multi-wedge belt is wound between the two track wheels;

[0039] After the upper compression molding die 405 moves upward, the vertical shaft 5, the turntable 9, and the lower compression molding die unit 10 are reset, that is, the lower compression molding die unit 10 is switched to directly in front of the operator, waiting for operations such as blanking and loading; The hydraulic power of the single-cylinder double-station compression molding module 4 is used to enable components such as the vertical shaft 5, the turntable 9, and the lower compression molding die unit 10 to perform synchronous rotational movements, and separate equipment and steps are no longer required for the rotation and positioning of the die;

[0040] The lower compression molding die unit 10 includes a limiting cylinder 1001 fixed at the bottom end of the turntable 9, a sliding column 1002 slidably installed inside the limiting cylinder 1001, and a lower compression molding die 1004 fixed at the top end of the sliding column 1002. A roller 1003 is rotatably installed at the bottom end of the sliding column 1002, and the roller 1003 is used to rollingly contact with the arc-shaped guideway 11. Straight-through chutes are arranged on the outer walls on both sides of the limiting cylinder 1001. Columnar protrusions are integrally formed on the outer walls on both sides of the sliding column 1002. One end of the columnar protrusion penetrates to the outside of the straight-through chute. An arc-shaped supporting plate is installed at the bottom of the supporting bracket 3 below the upper compression molding die 405, and the upper surface of the arc-shaped supporting plate slidably contacts with the lower surface of the lower compression molding die 1004;

[0041] When the lower compression molding die unit 10 is transferred from the upper compression molding die 405 to the arc-shaped guideway 11, the sliding column 1002 is automatically lifted by the action of the roller 1003 and the arc-shaped track of the arc-shaped guideway 11, that is, the sliding column 1002 and the lower compression molding die 1004 are lifted as a whole, so that the lower compression molding die 1004 and the workpiece are automatically raised a certain distance directly in front of the operator. At this time, the operator can turn on the double-axis blanking unit 12 through the control panel 13 to work, and the double-axis blanking unit 12 automatically removes the workpiece formed in the lower compression molding die 1004 to complete the blanking operation;

[0042] The double-axis blanking unit 12 adopts a structural form of a servo motor, a pulley transverse movement module, a slider, a double-rod cylinder, and an electric gripper. The servo motor, the pulley transverse movement module, and the slider enable the double-rod cylinder and the electric gripper to move horizontally, while the double-rod cylinder controls the height of the electric gripper to ensure that the electric gripper can pick up the workpiece in the lower compression mold 1004. Through the coordinated work of components such as the servo motor and the pulley transverse movement module, the automatic blanking function of the workpiece can be realized.

[0043] When the embodiment of the present application is in use, first, two staff members are respectively located in front of and behind the double-I-shaped hollow table 1, and the plastic material to be compression-molded is placed in the lower compression mold monomer 10. After the material is loaded, one of the staff members turns on the single-cylinder double-station compression molding module 4 through the control panel 13 to work. Then, the single-cylinder double-station compression molding module 4 makes the upper compression mold 405 move downward. During this process, the downward movement of the upper compression mold 405 will force the gear-rack transmission structure 7 to work, so that the gear-rack transmission structure 7 and the pulley drive structure 8 drive the bevel gear transmission mechanism 6 to act until this part of the power is transmitted to the vertical shaft 5 to realize its rotation and positioning. When the upper compression mold 405 is driven to the limit position of the downward position point, the turntable 9 also drives the lower compression mold monomer 10 to move downward to the directly below the upper compression mold 405 and close the mold with the upper compression mold 405. Through the drive of the gear-rack transmission structure 7, the pulley drive structure 8, and the bevel gear transmission mechanism 6, the lower compression mold monomer 10 can accurately and smoothly rotate to the correct station position. At this time, the upper compression mold 405 and the lower compression mold monomer 10 complete the mold closing action, and the production of two plastic product workpieces is carried out simultaneously in the equipment. When the workpieces in the two sets of upper compression molds 405 and lower compression mold monomers 10 are formed, the single-cylinder double-station compression molding module 4 drives the upper compression mold 405 to move upward and reset, and makes the turntable 9 and the lower compression mold monomer 10 rotate in the reverse direction to the position where the staff is located for the staff to carry out the blanking operation. After the staff takes out the workpiece from the lower compression mold monomer 10, it can be sent to the aggregate box by the double-axis blanking unit 12, thus completing the forming work of a plastic product. After that, the staff can reload the material and carry out the compression molding work. During the compression molding operation of the equipment, the molds at the two stations can simultaneously carry out blanking, heating, injection molding, and cooling work. Compared with the traditional single-station structure, the settings of the single-cylinder double-station compression molding module 4, the turntable 9, the bevel gear transmission mechanism 6, etc. can complete twice the production volume in the same time, and its parallel processing ability greatly improves the utilization rate and production efficiency of the equipment. Moreover, the vertical shaft 5 and the turntable 9 enable the lower compression mold monomer 10 to quickly transfer to the corresponding position below the station, which not only improves the speed of mold switching and transposition but also reduces the non-production time during the production process, thereby increasing the effective production time.

[0044] It should be noted that in this document, relational terms such as first and second are only used 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 "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or apparatus.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Compression molding equipment for the production of plastic products, characterized in that: include: A double I-shaped hollow table (1), wherein a U-shaped disc frame (2) is installed at the center position inside the double I-shaped hollow table (1), and a vertical shaft (5) is rotatably installed at the center position inside the U-shaped disc frame (2), a support frame (3) is fixed at the top end of the U-shaped disc frame (2), and a single-cylinder double-station compression mold group (4) is installed inside the support frame (3), and two symmetrical upper compression molds (405) are installed at the movable end of the single-cylinder double-station compression mold group (4), the top end of the vertical shaft (5) passes through the outside of the U-shaped disc frame (2) and is fixed with a turntable (9), and the top end of the turntable (9) is installed with two symmetrical lower compression mold units (10) that can slide and rise and fall in the Z-axis direction; a gear rack transmission structure (7), wherein the gear rack transmission structure (7) is installed at the bottom end of the upper compression mold (405); a bevel gear transmission mechanism (6) for power connection with the vertical shaft (5) is arranged inside the U-shaped disc frame (2); and a pulley drive structure (8) for power transmission is installed between the gear rack transmission structure (7) and the bevel gear transmission mechanism (6); An arc-shaped block (11), the arc-shaped block (11) is symmetrically installed on the front and rear sides of the top of the U-shaped disc frame (2) and is used to force the downward-pressing plastic mold unit (10) to actively move upward, the front and rear sides of the bottom of the support frame (3) are installed with a double-axis unloading unit (12) for picking up the internal molded workpiece of the downward-pressing plastic mold unit (10), and the outer wall of one side of the double I-shaped hollow platform (1) is installed with a control panel (13) electrically connected to the single-cylinder double-station plastic compression mold group (4) and the input end of the double-axis unloading unit (12); The gear rack transmission structure (7) comprises a bevel gear (701) fixed on the outer wall of one side of the upper compression mold (405), a short shaft rotatably mounted on the inner wall of one side of the double I-shaped hollow platform (1), and a driven bevel gear plate (702) mounted on one end of the short shaft, wherein the bottom end of the bevel gear (701) extends into the interior of the double I-shaped hollow platform (1) and meshes with the driven bevel gear plate (702); The bevel gear transmission mechanism (6) comprises a transverse shaft (601) rotatably mounted on the inner wall of one side of the double I-shaped hollow platform (1), and a bevel gear transmission structure (602) mounted on one end of the transverse shaft (601) for driving the vertical shaft (5) to rotate, wherein the transverse shaft (601) and the short shaft are connected to each other by a pulley drive structure (8); The bevel gear transmission structure (602) comprises a driving bevel gear and a driven bevel gear fixed on opposite ends of the horizontal shaft (601) and the vertical shaft (5), the driving bevel gear and the driven bevel gear meshing with each other; The downward-pressing plastic mold unit (10) comprises a limiting cylinder (1001) fixed at the bottom end of the rotating disk (9), a sliding column (1002) slidably installed inside the limiting cylinder (1001), and a downward-pressing plastic mold (1004) fixed at the top end of the sliding column (1002), a roller (1003) rotatably installed at the bottom end of the sliding column (1002), and the roller (1003) is used for rolling contact with the arc-shaped block (11), and straight-mouthed sliding grooves are arranged on the outer walls of both sides of the limiting cylinder (1001), and columnar protrusions are integrally formed on the outer walls of both sides of the sliding column (1002), and one end of the columnar protrusions penetrates to the outside of the straight-mouthed sliding grooves; When the lower compression mold unit (10) is transferred from the upper compression mold (405) to the arc-shaped block (11), the slide column (1002) is automatically lifted by the roller (1003) and the arc-shaped track of the arc-shaped block (11), that is, the slide column (1002) and the lower compression mold (1004) are moved upward as a whole, so that the lower compression mold (1004) and the workpiece are automatically lifted a certain distance in front of the staff. At this time, the staff can start the double-axis unloading unit (12) through the control panel (13) to work, and the double-axis unloading unit (12) automatically removes the workpiece formed in the lower compression mold (1004), completing the unloading action.

2. The compression molding equipment for producing plastic products according to claim 1, characterized in that: The support frame (3) comprises a lower plate fixed to the top of the double I-shaped hollow platform (1) and steel columns installed at the corners of the top of the lower plate, the tops of the four steel columns are equipped with an upper platform, and a circular through groove having the same outer diameter as the turntable (9) is provided at the center of the bottom of the lower plate.

3. The compression molding equipment for producing plastic products according to claim 1, characterized in that: The single-cylinder double-station compression mold assembly (4) comprises a hydraulic cylinder (401) mounted on one side of the top end of the support frame (3), a column (402) fixed at a bottom corner of the support frame (3), a double mold plate (403) slidably mounted on four of the columns (402), and an air spring (404) symmetrically mounted on both sides of the bottom end of the double mold plate (403), and the top end of the upper compression mold (405) is fixedly connected to the bottom end of the air spring (404).

4. The compression molding equipment for producing plastic products according to claim 3, characterized in that: Guide columns (406) are installed at the corner positions of the top end of the upper compression mold (405), and the top ends of the guide columns (406) extend to the inside of the double mold plate (403).

5. The compression molding equipment for producing plastic products according to claim 1, characterized in that: The pulley drive structure (8) comprises a track wheel fixed on the same end of the short shaft and the transverse shaft (601), and a multi-V belt is wound between the two track wheels.

6. The compression molding equipment for producing plastic products according to claim 1, characterized in that: An arc-shaped support plate is installed at the bottom of the support frame (3) below the upper compression mold (405), and the upper surface of the arc-shaped support plate and the lower surface of the lower compression mold (1004) are in sliding contact with each other.

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