Compression molding equipment for ceramic tile production

Abstract

The invention discloses compression molding equipment for ceramic tile production, and aims at solving the problems that in existing equipment, a molding pressing plate and a driving module are connected in a threaded mode, thread slipping and rusting are prone to occurring, and frequent disassembly and replacement are not convenient. The equipment comprises a machine table, a forming module and an adjusting module, wherein the forming module comprises a movable frame, a forming pressing plate, a locking module and a driving module; the moving frame is arranged above the machine table, the forming pressing plate can move up and down relative to the moving frame, the driving module drives the moving frame and the forming pressing plate to move up and down relative to the machine table, the adjusting module drives the forming module to integrally move up and down, and the locking module is used for restraining the moving stroke of the forming pressing plate relative to the moving frame and keeping connection of the forming pressing plate and the moving frame. A traditional threaded connection structure is replaced by the locking module, flexible adjustment of the adjusting module is matched, the connection reliability and remodeling efficiency of the pressing plate are improved, meanwhile, the blank forming quality is guaranteed, and the production, operation and maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of ceramic tile production technology, and in particular to a molding equipment for ceramic tile production. Background Technology

[0002] In the ceramic tile manufacturing industry, body molding is a core process that determines the product's shape accuracy, structural strength, and subsequent processing performance. Ceramic tile body molding equipment is the key production device for realizing this process, and its operational stability and processing adaptability directly affect the company's production efficiency and product quality. With the rapid development of the building decoration industry, the market demand for ceramic tile specifications and styles is becoming increasingly diversified, from traditional standard-sized tiles to customized large-size and irregular-shaped tiles, placing higher demands on the flexible adjustment capabilities of molding equipment.

[0003] In existing technologies, the core working unit of ceramic tile blank molding equipment mainly consists of a drive module and a forming plate. The drive module typically uses a hydraulic cylinder as its power source, transmitting pressure through the hydraulic system to drive the forming plate in a linear reciprocating motion. This applies stable pressure to the ceramic blank within the mold, completing the compression molding of the blank. During this process, the forming plate, as the component directly in contact with the blank, must have dimensions strictly matched to the type of ceramic tile being processed. Therefore, when switching to produce different tile specifications, the forming plate must be disassembled and replaced. The convenience and reliability of this operation become crucial factors affecting production continuity.

[0004] Currently, the most common connection method used in the industry for the connection between the forming platen and the drive module is a threaded connection or a structure with multiple bolts. This type of connection is widely used in various forming equipment due to its simple structure, high initial connection reliability, and low manufacturing cost. However, under the actual working conditions of ceramic tile production, this connection structure has gradually revealed significant defects: On the one hand, the high-frequency vibration generated by the hydraulic cylinder during the forming process continuously acts on the threaded connection, which, after long-term use, easily leads to an increase in the thread clearance, causing problems such as stripping and loosening, directly affecting the stable transmission of molding pressure, and potentially causing quality problems such as uneven green body density and edge defects; on the other hand, ceramic production workshops usually contain a certain amount of moisture and dust, and the threaded connection is prone to corrosion due to moisture erosion. Corrosion not only accelerates thread wear but also causes thread jamming during disassembly, greatly increasing the difficulty and time required for platen replacement.

[0005] Crucially, with the diversification of market demand, companies need to frequently switch pressure plates to adapt to the production of bricks of different specifications. However, the structure of threaded connection or multiple bolt locking itself has the problem of complicated disassembly steps and long time consumption. Combined with the potential for failures such as stripping and corrosion, this further reduces the efficiency of equipment changeover, increases the labor intensity of operators, and may even lead to production interruption due to excessive time spent on the changeover process, affecting the company's production plan. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a molding equipment for the production of ceramic tiles.

[0007] A molding equipment for ceramic tile production designed for this purpose includes a machine base, a molding module, and an adjustment module.

[0008] The molding module includes a movable frame, a molding plate, a locking module, and a driving module;

[0009] The movable frame is positioned above the machine base; the forming plate is vertically movable relative to the movable frame.

[0010] The drive module is used to drive the moving frame and the forming platen to move up and down relative to the machine platform.

[0011] The adjustment module is used to drive the molding module to move up and down relative to the machine platform;

[0012] The locking module is used to constrain the vertical movement of the forming plate relative to the moving frame and to maintain their connection.

[0013] Preferably, the movable frame is provided with a plurality of vertically penetrating mounting holes, and the forming pressure plate is provided with connecting posts corresponding to the mounting holes;

[0014] The connecting column is movably inserted into the mounting hole; the connecting column is provided with a travel groove that runs through the left and right directions; the movable frame is provided with a connecting hole that runs through the left and right directions and communicates with the mounting hole.

[0015] The locking module is movably positioned relative to the movable frame and is at least partially inserted into the connecting hole and the travel groove.

[0016] A buffer spring is provided between the movable frame and the forming pressure plate.

[0017] Preferably, the locking module includes a movable element that moves left and right relative to the movable frame. The movable element is connected to a constraint rod, which can be inserted into the connecting hole and the travel groove. The movable element is connected to the movable frame by a constraint spring, which pushes the movable element to move so that the constraint rod remains inserted into the connecting hole and the travel groove.

[0018] Preferably, the moving element is also connected to a locking rod, and the moving frame is provided with a guide channel that runs through the left and right directions, and the locking rod is movably inserted into the guide channel;

[0019] The locking rod is provided with a first locking hole that runs vertically through the top and bottom, and the movable frame is provided with a second locking hole that runs vertically through the bottom and bottom.

[0020] The machine base is fixedly connected to a locking rod that is movably inserted into the first locking hole and the second locking hole.

[0021] Preferably, the locking lever is connected to an operating handle.

[0022] Preferably, the movable element is provided with a plurality of guide rods, which are movably positioned to move left and right relative to the movable frame.

[0023] Preferably, the locking module is provided in two sets and is located on the left and right sides of the movable frame respectively; the connecting columns are provided in two rows, each row of the connecting columns includes multiple connecting columns arranged in the front-back direction; the mounting holes are provided corresponding to the connecting columns.

[0024] Preferably, the adjustment module includes an adjustment frame and a fixing frame;

[0025] The adjusting frame is disposed below the fixed frame and is movable up and down relative to the machine platform; the fixed frame is fixed relative to the machine platform.

[0026] The fixed frame is equipped with a lifting module for driving the adjusting frame to move up and down;

[0027] The drive module is fixedly mounted on the adjustment frame and connected to the movable frame.

[0028] Preferably, the lifting module includes a lead screw rotatably mounted on the fixed frame, and the adjusting frame is provided with a lead screw nut threadedly connected to the lead screw; the fixed frame is provided with a driver drive that is drivenly connected to the lead screw.

[0029] Preferably, the machine base is fixedly connected to several guide columns; the movable frame and the adjusting frame are movable up and down relative to the guide columns; and the fixed frame is fixedly connected to the guide columns.

[0030] Compared with existing technologies, this invention replaces traditional threaded connections or multi-bolt locking structures with a locking module, effectively avoiding problems such as stripping and corrosion that easily occur in threaded connections during long-term use. This structurally ensures the stability of the connection between the forming platen and the moving frame, preventing abnormal pressure transmission due to connection failure. Simultaneously, the locking module's integrated design of constraining the vertical movement of the forming platen and maintaining the connection simplifies the disassembly and replacement process of the forming platen. It eliminates the need for tedious bolt tightening operations using special tools, greatly reducing the labor intensity of operators and significantly improving the changeover efficiency when switching between different brick sizes, thus reducing equipment downtime.

[0031] Meanwhile, the forming platen can be moved up and down relative to the moving frame. Its core purpose is to achieve a buffering function during the molding process, avoiding hard contact between the forming platen and the blank or mold. At the same time, the locking module precisely constrains the buffer stroke, ensuring that the buffering effect is controllable and stable. On this basis, the adjustment module can drive the entire forming module to move up and down. By fine-tuning its up and down position, the working position of the forming platen can be flexibly adjusted, thereby adapting to the forming needs of ceramic tile blanks of different specifications and thicknesses. There is no need to customize a special platen component for specific tile specifications, which effectively broadens the processing and adaptability range of the equipment. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 This is one of the cross-sectional structural schematic diagrams of the present invention;

[0034] Figure 3 This is a second schematic diagram of the cross-sectional structure of the present invention;

[0035] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0036] Figure 5 This is the third cross-sectional structural schematic diagram of the present invention;

[0037] Figure 6 This is the fourth cross-sectional structural schematic diagram of the present invention;

[0038] Figure 7 This is a structural breakdown diagram of the locking module. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] See Figures 1-7A molding equipment for ceramic tile production includes a machine base 10, a molding module, and an adjustment module 50. The molding module includes a movable frame 20, a molding pressure plate 30, a locking module 40, and a drive module 60. The movable frame 20 is disposed above the machine base 10. The molding pressure plate 30 is movable vertically relative to the movable frame 20. The drive module 60 is used to drive the movable frame 20 and the molding pressure plate 30 to move vertically relative to the machine base 10. The adjustment module 50 is used to drive the molding module to move vertically relative to the machine base 10. The locking module 40 is used to constrain the vertical movement of the molding pressure plate 30 relative to the movable frame 20 and maintain their interconnection. The movable frame 20 is provided with several vertically penetrating mounting holes 210, and the forming plate 30 is provided with connecting posts 310 corresponding to the mounting holes 210; the connecting posts 310 are movably inserted into the mounting holes 210; the connecting posts 310 are provided with stroke grooves 320 penetrating in the left and right direction; the movable frame 20 is provided with connecting holes 220 penetrating in the left and right direction and communicating with the mounting holes 210; the locking module 40 is movably positioned relative to the movable frame 20 and is at least partially inserted into the connecting hole 220 and the stroke groove 320; a buffer spring 300 is provided between the movable frame 20 and the forming plate 30. The locking module 40 includes a movable element 400 that moves left and right relative to the movable frame 20. The movable element 400 is connected to a constraint rod 410, which can be inserted into the connecting hole 220 and the travel groove 320. A constraint spring 440 is connected to the movable element 400 and the movable frame 20. The constraint spring 440 pushes the movable element 400 to move, so that the constraint rod 410 remains inserted into the connecting hole 220 and the travel groove 320. The movable element 400 is also connected to a locking rod 450. The movable frame 20 is provided with a guide channel 230 that runs through the left and right direction. The locking rod 450 is movably inserted into the guide channel 230. The locking rod 450 is provided with a first locking hole 460 that runs vertically through the frame. The movable frame 20 is provided with a second locking hole 240 that runs vertically through the frame. The machine base 10 is fixedly connected to a locking rod 70 that is movably inserted into the first locking hole 460 and the second locking hole 240.

[0041] The operating logic of this ceramic tile production molding equipment revolves around the adjustment module's position switching function and the locking module's status control. All components work together to achieve efficient connection between body molding and pressure plate replacement. The specific principle is as follows:

[0042] This application focuses on solving the problems of efficiency and precision in the molding process of ceramic tile blanks. In actual production, the blanks can be fed using an automated conveyor belt feeding mode, that is, the molding frame 100, pre-loaded with ceramic blanks, is smoothly transported to the molding position of the machine 10 via a conveyor belt. To ensure that the molding frame 100 does not shift during the molding process and to guarantee the accuracy of the blank molding, the machine 10 is equipped with several positioning cylinders corresponding to the placement area of ​​the molding frame 100. When the molding frame 100 is delivered to the position, the piston rod of the positioning cylinder quickly extends and presses against the outer periphery of the molding frame 100, forming a stable limit on the molding frame 100 from multiple directions, so that the molding frame 100 is precisely aligned with the molding plate 30, providing a reliable positioning reference for subsequent molding processes.

[0043] Under normal working conditions, the adjustment module plays two core roles, and its function is strongly related to the position of the forming module: First, it is a fine-tuning function within the working area. At this time, the forming module is in the working area, and the adjustment module drives the entire forming module to move slightly up and down relative to the machine 10. By precisely adjusting the relative distance between the forming platen 30 and the mold, it can adapt to the forming requirements of ceramic tile blanks of different thicknesses. Second, it is a region switching function. The adjustment module can drive the forming module to complete the overall position transfer between the working area and the unlocking area, providing the necessary conditions for the replacement of the forming platen 30.

[0044] When the molding module is in the working area, the locking rod 70 fixed on the machine base 10 will be simultaneously inserted into the first locking hole 460 of the locking rod 450 in the locking module 40 and the second locking hole 240 of the moving frame 20, forming a double mechanical limit. At this time, the moving element 400 of the locking module 40 is completely constrained and cannot move left or right relative to the moving frame 20. The constraint rod 410 connected to it will be stably inserted into the stroke groove 320 of the connecting hole 220 of the moving frame 20 and the connecting post 310 of the molding plate 30, which not only limits the vertical movement stroke (i.e., buffer stroke) of the molding plate 30 relative to the moving frame 20, but also maintains the reliable connection between the two. At the same time, the buffer spring 300 between the moving frame 20 and the molding plate 30 is in a pre-compressed state. The molding plate 30 can achieve flexible buffering during molding by the movable fit of the connecting post 310 in the mounting hole 210 of the moving frame 20. During operation, the drive module 60 drives the moving frame 20 and the forming platen 30 to move up and down synchronously relative to the machine base 10 to complete the pressing and forming of the blank. The pressure transmission is stable and there is no risk of hard contact damage.

[0045] The specific execution process of the molding action is as follows: After the drive module 60 is started, it outputs a downward driving force, which drives the moving frame 20 to move downward as a whole. The molding plate 30, which is connected to the moving frame 20, moves downward synchronously until the molding plate 30 is precisely pressed onto the surface of the ceramic blank in the molding frame 100. As the drive module 60 continues to apply force, the reaction force generated by the blank acts on the molding plate 30. At this time, the buffer spring 300 plays a core buffering role and is gradually compressed under pressure. The molding plate 30 generates an upward displacement relative to the moving frame 20, and the connecting column 310 slides upward in the mounting hole 210. Since the constraint rod 410 is constrained by the connecting hole 220 and cannot move up and down, the connecting column 310 will drive the stroke groove 320 to slide upward relative to the constraint rod 410. This ensures the smoothness of the buffering process and avoids excessive buffering by limiting the length of the stroke groove 320. During this process, the elastic force of the buffer spring 300 can offset part of the impact pressure, so that the molding pressure gradually increases, effectively avoiding the blank damage or pressure plate damage caused by hard contact, while ensuring that the blank is subjected to uniform force and improving the molding quality.

[0046] When the molding platen 30 needs to be replaced, the molding module is first moved to the unlocking area by adjusting the module. During this process, the locking rod 70 will completely disengage from the first locking hole 460 and the second locking hole 240, releasing the positional constraint on the locking module 40. The operator can push the moving element 400 to overcome the elastic force of the constraint spring 440 and move relative to the moving frame 20. The moving element 400 will simultaneously drive the constraint rod 410 to exit from the connecting hole 220 and the stroke groove 320, and the connection constraint between the molding platen 30 and the moving frame 20 will be released. At this time, the connecting post 310 of the molding platen 30 can move freely downward in the mounting hole 210, and the operator can directly separate and disassemble the molding platen 30 from the moving frame 20.

[0047] When assembling the new molding platen 30, the connecting post 310 of the new platen must first be aligned with the mounting hole 210 of the moving frame 20 and inserted, ensuring that the stroke groove 320 of the connecting post 310 and the connecting hole 220 of the moving frame 20 are in a straight line. Then, the moving element 400 is released, and the elastic force of the constraint spring 440 will push the moving element 400 back to its original position, causing the constraint rod 410 to re-insert into the connecting hole 220 and the stroke groove 320, completing the initial connection between the molding platen 30 and the moving frame 20. Finally, by adjusting the module, the entire molding module returns to the working area, and the locking rod 70 automatically inserts into the first locking hole 460 and the second locking hole 240, restoring the locking module 40 to its locked state. The equipment can then enter the production process for new specification bricks.

[0048] In this invention, the locking lever 450 is connected to an operating handle 420. The moving element 400 is provided with several guide rods 430, which are movably positioned relative to the moving frame 20. The operating handle 420 on the locking lever 450 provides a convenient point of force for the operator to push the moving element 400, allowing easy control of its movement without additional tools, further improving the convenience of unlocking and resetting the locking module 40. The guide rods 430 of the moving element 400 and the moving frame 20 cooperate in left-right movement, precisely guiding and limiting the movement direction of the moving element 400, preventing deviation or jamming during movement, ensuring that the constraint rod 410 can stably and accurately insert into or disengage from the connecting hole 220 and the travel groove 320, and guaranteeing the reliability of locking and unlocking actions.

[0049] In this invention, two sets of locking modules 40 are provided, located on the left and right sides of the movable frame 20 respectively; two rows of connecting columns 310 are provided, each row including multiple connecting columns 310 arranged in the front-back direction; mounting holes 210 are correspondingly provided with the connecting columns 310. The locking modules 40 are provided in two sets on the left and right sides of the movable frame 20, which can simultaneously achieve locking and unlocking from both lateral ends, so that the forming platen 30 is subjected to balanced force and avoids connection offset caused by unilateral constraint; the design of two rows of connecting columns 310 arranged in the front-back direction, together with the corresponding mounting holes 210, can greatly improve the connection support strength between the forming platen 30 and the movable frame 20, and the pressure transmission during molding is more uniform, further ensuring the molding accuracy of the preform.

[0050] In this invention, the adjustment module 50 includes an adjustment frame 500 and a fixed frame 510; the adjustment frame 500 is disposed below the fixed frame 510 and is movable vertically relative to the machine base 10; the fixed frame 510 is fixedly disposed relative to the machine base 10; the fixed frame 510 is provided with a lifting module for driving the adjustment frame 500 to move vertically; the drive module 60 is fixedly disposed on the adjustment frame 500 and connected to the moving frame 20, the lifting module includes a lead screw 520 rotatably disposed on the fixed frame 510, the adjustment frame 500 is provided with a lead screw nut 550 threadedly connected to the lead screw 520; the fixed frame 510 is provided with a driver that is drively connected to the lead screw 520, the driver being a servo motor. The structural design of the adjustment module combines stable support with precise adjustment: the fixed frame 510 is fixed relative to the machine base 10, providing a stable base for the entire adjustment system; the servo motor drives the lead screw 520 to rotate, and through the threaded engagement of the lead screw 520 and the lead screw nut 550, the rotational motion is converted into the smooth lifting and lowering of the adjustment frame 500, realizing high-precision control of the forming module position; it not only meets the micron-level fine adjustment to adapt to different blank thicknesses within the working area, but also stably completes the switching between the working and unlocking areas; the drive module 60 is fixed to the adjustment frame 500, so that the adjustment action is directly transmitted to the forming system, ensuring the accuracy and timeliness of position adjustment, and providing a guarantee for the efficient operation of the equipment.

[0051] In this invention, according to different transmission and lifting requirements, two lead screws 520 are set in the adjustment module 50, and synchronous pulleys 530 are set on both lead screws 520. Then, the transmission is achieved by the synchronous belt 540 being sleeved on the two synchronous pulleys 530, while the driver always maintains a transmission connection with one of the lead screws 520.

[0052] In this invention, the machine base 10 is fixedly connected with a plurality of guide columns 110; the movable frame 20 and the adjusting frame 500 are arranged to move up and down relative to the guide columns 110; and the fixed frame 510 is fixedly connected to the guide columns 110.

[0053] In this invention, the drive module uses hydraulic cylinders. The number and position of the hydraulic cylinders are set according to specific requirements.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A molding equipment for ceramic tile production, characterized in that: Includes a machine base (10), a forming module, and an adjustment module (50); The molding module includes a movable frame (20), a molding plate (30), a locking module (40), and a driving module (60); The movable frame (20) is disposed above the machine base (10); the forming plate (30) is disposed vertically relative to the movable frame (20); The drive module (60) is used to drive the moving frame (20) and the forming platen (30) to move up and down relative to the machine base (10); The adjustment module (50) is used to drive the molding module to move up and down relative to the machine base (10); The locking module (40) is used to constrain the vertical movement of the forming plate (30) relative to the moving frame (20) and to maintain their mutual connection.

2. The molding equipment for ceramic tile production according to claim 1, characterized in that: The movable frame (20) is provided with a plurality of vertically penetrating mounting holes (210), and the forming pressure plate (30) is provided with connecting posts (310) corresponding to the mounting holes (210); The connecting column (310) is movably inserted into the mounting hole (210); the connecting column (310) is provided with a travel groove (320) that runs through the left and right directions; the movable frame (20) is provided with a connecting hole (220) that runs through the left and right directions and communicates with the mounting hole (210); The locking module (40) is movably positioned relative to the moving frame (20) and is at least partially inserted into the connecting hole (220) and the travel groove (320); A buffer spring (300) is provided between the movable frame (20) and the forming plate (30).

3. The molding equipment for ceramic tile production according to claim 2, characterized in that: The locking module (40) includes a moving element (400) that moves left and right relative to the moving frame (20). The moving element (400) is connected to a constraint rod (410), which can be inserted into the connecting hole (220) and the travel groove (320). The moving element (400) is connected to the moving frame (20) by a constraint spring (440), which pushes the moving element (400) to move, so that the constraint rod (410) remains inserted into the connecting hole (220) and the travel groove (320).

4. The molding equipment for ceramic tile production according to claim 3, characterized in that: The moving element (400) is also connected to a locking rod (450), and the moving frame (20) is provided with a guide channel (230) that runs through the left and right directions. The locking rod (450) is movably inserted into the guide channel (230). The locking rod (450) is provided with a first locking hole (460) that runs vertically through the ground, and the moving frame (20) is provided with a second locking hole (240) that runs vertically through the ground. The machine base (10) is fixedly connected with a locking rod (70) that is movably inserted into the first locking hole (460) and the second locking hole (240).

5. A molding equipment for ceramic tile production according to claim 4, characterized in that: The locking lever (450) is connected to an operating handle (420).

6. A molding equipment for ceramic tile production according to claim 3, characterized in that: The movable element (400) is provided with a plurality of guide rods (430), which are arranged to move left and right relative to the movable frame (20).

7. A molding equipment for ceramic tile production according to claim 2, characterized in that: The locking module (40) is provided in two sets and is located on the left and right sides of the movable frame (20) respectively; the connecting column (310) is provided in two rows on the left and right, and each row of the connecting column (310) includes multiple connecting columns (310) arranged in the front and back direction; the mounting hole (210) is provided corresponding to the connecting column (310).

8. A molding equipment for ceramic tile production according to claim 1, characterized in that: The adjustment module (50) includes an adjustment frame (500) and a fixing frame (510); The adjusting frame (500) is located below the fixed frame (510) and the adjusting frame (500) is movable up and down relative to the machine base (10); the fixed frame (510) is fixed relative to the machine base (10); The fixed frame (510) is provided with a lifting module for driving the adjusting frame (500) to move up and down; The drive module (60) is fixedly mounted on the adjustment frame (500) and connected to the movable frame (20).

9. A molding equipment for ceramic tile production according to claim 8, characterized in that: The lifting module includes a lead screw (520) rotatably mounted on the fixed frame (510), and the adjusting frame (500) is provided with a lead screw nut (550) threadedly connected to the lead screw (520); the fixed frame (510) is provided with a driver that is drively connected to the lead screw (520).

10. A molding equipment for ceramic tile production according to claim 8, characterized in that: The machine base (10) is fixedly connected to several guide columns (110); the movable frame (20) and the adjusting frame (500) are arranged to move up and down relative to the guide columns (110); the fixed frame (510) is fixedly connected to the guide columns (110).

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