A calender

Abstract

The present invention relates to the technical field of calenders, and in particular to a calender, which comprises a workbench, two brackets and two rollers; two baffles arranged on the workbench, the baffles being made of hard aluminum bars; a spacing adjustment member arranged between the two brackets, the spacing adjustment member being used to adjust the spacing between the two baffles; a support frame arranged on the workbench, a flattening block being vertically slidably connected to the support frame, a control member for vertically sliding the flattening block being provided on the support frame, flattening wheels that can match the top surface of the support plate being connected to both ends of the flattening block, a raised portion in the middle of the flattening block being slidably inserted between the two baffles, a horizontally placed support plate being connected to the baffle, and a paving plate matching the rollers being provided on the support plate. The present invention can reduce overflow and waste during the calendering process of raw materials, and improve the flatness of the edge of the sheet.

Description

Technical Field

[0001] The invention relates to the technical field of calenders, in particular to a calender. Background Art

[0002] The calender is an important equipment for the continuous production of plastic film and other sheets. It is widely used in rubber, plastics, building materials and other industries. The calender can heat and plasticize plastics, rubber and other raw materials to achieve a uniform mixing effect. By adjusting the distance between the two rollers of the calender, the thickness of the sheet can be controlled to meet the needs of different products. The calender can realize continuous production and improve production efficiency and quality.

[0003] Referring to the Chinese patent document with authorization announcement number CN118144192B and announcement date June 7, 2024, the name is a continuous heated rubber calender, which includes a workbench, a positioning frame and two rollers. There will be a certain speed ratio between the two adjacent rollers and they rotate relative to each other. At this time, the raw materials will be brought into the roller gap due to the friction between the rollers, and the raw materials will slowly be subjected to the sharp and strong shear force and extrusion force and be rolled into shape.

[0004] With regard to the above-mentioned related technologies, when it is necessary to produce sheets with a certain thickness, you can choose to place baffles on the calender platform. There are calendering films on the bottom and top surfaces of the baffles to facilitate the transportation of raw materials and calendered sheets. The baffles limit the flow range of the material during the calendering process, thereby limiting the size and edge shape of the sheet. However, the position of the baffles may deviate and have low precision. In addition, the baffles are usually made of flexible materials and are prone to deformation, resulting in the edge of the sheet being not smooth enough, affecting the appearance and quality of the sheet. In addition, the raw materials will overflow from the baffles, causing waste of raw materials. The overflowed raw materials also need to be trimmed by the staff later, which reduces production efficiency and increases the workload of workers. Summary of the invention

[0005] In view of this, the present invention provides a calender, which aims to solve the technical problem in the prior art that when producing thicker sheets, the raw materials at the baffles may deform and overflow.

[0006] To solve the above technical problems, the present invention provides a calender, which adopts the following technical scheme: a calender, comprising a workbench, two brackets and two rollers, the rollers are rotatably supported between the two brackets, and the two rollers cooperate to calender the raw materials on the workbench; two baffles arranged on the workbench, the baffles are made of hard aluminum bars; a spacing adjustment member arranged between the two brackets, the spacing adjustment member is used to adjust the spacing between the two baffles; a support frame arranged on the workbench, a flattening block is vertically slidably connected to the support frame, a control member for making the flattening block slide vertically is provided on the support frame, flattening wheels that can match the top surface of the support plate are connected to both ends of the flattening block, a raised part in the middle of the flattening block is slidably inserted between the two baffles, a horizontally placed support plate is connected to the baffle, a paving plate matching the rollers is provided on the support plate, and a plurality of flattening wheels are connected to the bottom surface of the paving plate.

[0007] By adopting the above technical solution, the soft baffles are replaced with hard baffles. The baffles and support plates limit the edge of the sheet, avoiding the uneven edge of the sheet and the overflow of raw materials due to the deformation of the baffles as much as possible. It can improve the flatness and uniformity of the edge of the sheet after calendering, improve product quality, reduce the waste of raw materials, and reduce the need for workers to trim the edge of the sheet. Set up spacing adjustment parts to improve the flexibility of the device and expand the scope of application of the device. Set up a paving plate and a flattening block to facilitate flattening the film on the workbench and subsequent calendering of the raw materials on the film.

[0008] Optionally, the spacing adjustment member includes a bidirectional screw, a first guide rod and two connecting plates, the bidirectional screw is rotatably arranged between the two brackets, the first guide rod is horizontally arranged between the two brackets, the two connecting plates are vertically placed, the two connecting plates are respectively fixedly connected to a support plate, the first guide rod passes through the two connecting plates in a sliding connection, the two connecting plates are respectively threadedly connected to one end of the bidirectional screw, and the threads at both ends of the bidirectional screw have opposite rotation directions.

[0009] By adopting the above technical solution, when the bidirectional screw rotates, the connecting plates at both ends of the bidirectional screw approach each other or move away from each other, which is convenient for synchronously adjusting the connecting plates at both ends, that is, synchronously adjusting the positions of the two baffles, so that the two baffles can maintain good centering.

[0010] Optionally, the paving plate is fixedly connected to the connecting plate via a fixing rod, a connecting rod is provided on the bracket, one end of the connecting rod passes through the connecting plate and is slidably inserted into the fixing rod.

[0011] By adopting the above technical solution, the paving plate is fixedly connected to the connecting plate. During the process of adjusting the position of the connecting plate, the paving plate moves synchronously, that is, the paving plate and the supporting plate are adjusted synchronously, which is convenient for maintaining the positional relationship of the structure without the need for multiple adjustments. Setting a connecting rod is beneficial to improving the stability of the device.

[0012] Optionally, a first rotating block is fixedly connected to the middle portion of the bidirectional lead screw.

[0013] By adopting the above technical solution, it is convenient for the staff to manually rotate the bidirectional lead screw and adjust the position of the baffle bar.

[0014] Optionally, the control member includes a control screw, a second guide rod and a movable plate, the control screw passes through the support frame in a threaded connection manner and is rotatably connected to the top surface of the movable plate, the second guide rod passes through the support frame in a sliding connection manner and is fixedly connected to the top surface of the movable plate, and the flattening block is detachably connected to the bottom surface of the movable plate in a threaded connection manner.

[0015] By adopting the above technical solution, the control screw is rotated to facilitate the adjustment of the positions of the movable plate and the flattening block, so that the flattening block can flatten the calendered film, so that the film fits with the side of the baffle bar and the top surface of the workbench between the two baffle bars, and it is convenient to add raw materials to the film, thereby reducing the risk of the film being ruptured due to excessive force during the calendering process. The flattening block is disassembled and connected to the movable plate, which facilitates the replacement of the flattening block, so that the flattening block can cooperate with the two baffle bars, thereby expanding the scope of application of the device.

[0016] Optionally, a second rotating block is fixedly connected to the top of the control screw.

[0017] By adopting the above technical solution, it is convenient for the staff to manually rotate the bidirectional lead screw to adjust the position of the movable plate, that is, to adjust the position of the flattening block.

[0018] Optionally, a through groove is provided on the workbench, wherein one roller is arranged under the workbench and its top surface is flush with the workbench surface, the other roller and two support plates are vertically slidably connected to the bracket, and the baffle is detachably connected to the bottom surface of the support plate in a sliding connection.

[0019] By adopting the above technical solution, it is easy to adjust the distance between the two rollers, and the baffle bar is detachably connected to the bottom surface of the support plate, so that a suitable baffle bar can be selected according to the roller distance, ensuring the limiting effect of the baffle bar and the support plate on the edge of the sheet, thereby improving the neatness and uniformity of the edge of the sheet.

[0020] Optionally, both ends of the roller located above are fixedly connected to support blocks, both ends of the bidirectional screw and the first guide rod are respectively connected to a support block, the two fixed rods correspond to the two support blocks in a fixed connection manner, and the bracket is provided with a sliding member that corresponds to the two support blocks one by one and can adjust the vertical position of the support blocks.

[0021] By adopting the above technical solution and arranging the support block, it is convenient to synchronously adjust the positions of the roller and the support plate.

[0022] Optionally, the sliding member includes a motor, a third lead screw and a plurality of third guide rods, the third lead screw is fixedly connected to the output end of the motor, the plurality of third guide rods are vertically placed and pass through the support block in a sliding connection, and the third lead screw passes through the support block in a threaded connection.

[0023] By adopting the above technical solution, the motor drives the third lead screw to rotate, so as to adjust the vertical heights of the two support blocks, which is convenient for use.

[0024] In summary, the present invention includes the following beneficial technical effects:

[0025] 1. The soft baffles in the past are changed into hard baffles. The baffles and the support plates limit the edges of the sheets, reducing the problems of overflow and uneven edges of the sheets caused by the deformation of the baffles in the past. The flatness and uniformity of the edges of the sheets after calendering can be improved, the product quality can be improved, the waste of raw materials can be reduced, and the work intensity of the staff can be reduced. The spacing adjustment parts can be set to improve the flexibility and application scope of the device. The spreading plate and the flattening wheel will lay the calendering film on the side wall of the baffle, the top surface of the support plate and the workbench surface between the two baffles, which is convenient for flattening the calendering film, so that the film fits with the side of the baffle, the top surface of the support plate and the workbench surface between the two baffles, which can reduce the risk of the film breaking during the calendering process and improve the stability of the device. During the calendering process, the paving plate limits the part of the film located on the support plate to ensure the position and flatness of the film during the calendering process, which is convenient for calendering the raw materials on the film.

[0026] 2. The vertical height of one of the rollers and the two support plates can be adjusted through the sliding member, further expanding the application scope of the device and improving the flexibility of the device.

[0027] 3. The device uses multiple lead screws to adjust the structural position, converting rotational motion into linear motion, which can be precisely adjusted. The lead screws have good load-bearing capacity, good stability, and simple maintenance. The lead screw system can be used in a variety of working environments, has strong applicability, flexible installation, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the spacing adjustment member and the paving plate in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A;

[0031] Figure 4 It is a schematic diagram of the structure of the flattening block and the control member in an embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the structure of the control member and the sliding member in the embodiment of the present invention.

[0033] Explanation of the accompanying drawings: 1. workbench; 2. bracket; 3. roller; 4. baffle; 41. support plate; 5. spacing adjustment member; 51. bidirectional screw; 511. first rotating block; 52. first guide rod; 53. connecting plate; 6. support frame; 7. flattening block; 8. control member; 81. control screw; 811. second rotating block; 82. second guide rod; 83. movable plate; 9. flattening wheel; 10. paving plate; 101. fixing rod; 102. connecting rod; 11. flattening wheel; 12. support block; 13. sliding member; 131. motor; 132. third screw; 133. third guide rod. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] The following is combined with Figure 1 -Attached Figure 5 The present invention is described in further detail.

[0036] The embodiment of the invention discloses a calender.

[0037] Reference Figures 1 to 5 A calender includes a workbench 1, two brackets 2 and two rollers 3. The workbench 1 is in the shape of a rectangular parallelepiped as a whole, the bracket 2 is in the shape of a rectangular parallelepiped as a whole and is placed vertically, the two brackets 2 are arranged in the short side direction of the workbench 1 and are respectively located on one side of the workbench 1, the two rollers 3 are placed horizontally, the axial directions of the two rollers 3 are parallel to the short side direction of the workbench 1, the two rollers 3 are arranged in the vertical direction, the rollers 3 are rotatably supported between the two brackets 2, and the two rollers 3 cooperate to calender the raw materials on the workbench 1.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4Two baffles 4 are arranged on the workbench 1. The baffles 4 are placed vertically and are rectangular in shape. The long side of the baffles 4 is parallel to the long side of the workbench 1. The two baffles 4 are arranged in the short side of the workbench 1. The baffles 4 are made of hard aluminum bars. A spacing adjustment member 5 is arranged between the two brackets 2. The spacing adjustment member 5 is used to adjust the spacing between the two baffles 4. A vertically placed support frame 6 is provided on the workbench 1, and a flattening block 7 is vertically slidably connected to the support frame 6. A control member 8 for vertically sliding the flattening block 7 is provided on the support frame 6, and flattening wheels 9 that can match the top surface of the support plate 41 are connected to both ends of the flattening block 7. The raised part in the middle of the flattening block 7 is slidably inserted between two baffle bars 4, and a horizontally placed support plate 41 is connected to the baffle bar 4. A paving plate 10 is provided on the support plate 41, and a plurality of flattening wheels 11 are connected to the bottom surface of the paving plate 10. The side of the paving plate 10 close to the roller 3 is set as an arc surface that matches the side wall of the roller 3.

[0039] The flattening plate and the flattening wheel 9 lay the calendering film on the side wall of the baffle 4, the top surface of the support plate 41 and the surface of the workbench 1 between the two baffles 4. The raw material is poured on the film. A film is provided on one of the rollers 3. The raw material is calendered between the two films. The two rollers 3 rotate in coordination to convey the raw material and the two films forward. The two rollers 3 calender the films and the raw material between the films. The two baffles 4 and the two support plates 41 limit the edges of the sheet. During the calendering process, the flattening plate 10 limits the portion of the film located on the support plate 41 to ensure the position and flatness of the film during the calendering process, which is convenient for calendering the raw material on the film.

[0040] Changing the soft baffle 4 to a hard baffle 4 can reduce the problems of overflow and uneven edge of the sheet caused by the deformation of the baffle 4, and can improve the flatness and uniformity of the edge of the sheet after calendering, improve product quality, reduce the waste of raw materials, and reduce the work intensity of the staff. The spacing adjustment member 5 is provided to improve the flexibility and scope of application of the device. The flattening block 7 and the paving plate 10 are provided to facilitate flattening the film used for calendering, so that the film fits with the side of the baffle 4, the top surface of the support plate 41 and the surface of the workbench 1 between the two baffles 4, which can reduce the risk of the film breaking during the calendering process and improve the stability of the device. Among them, the baffle 4 in the present invention can also be made of other hard materials.

[0041] Reference Figure 1 and Figure 2The spacing adjustment member 5 includes a bidirectional lead screw 51, a first guide rod 52 and two connecting plates 53. The bidirectional lead screw 51 is horizontally placed and rotatably arranged between the two brackets 2, the first guide rod 52 is horizontally placed between the two brackets 2, the axial direction of the first guide rod 52 and the axial direction of the bidirectional lead screw 51 are both parallel to the short side direction of the workbench 1, the two connecting plates 53 are both vertically placed, the two connecting plates 53 are respectively fixedly connected to the top surface of a support plate 41, the first guide rod 52 passes through the two connecting plates 53 in a sliding connection, the two connecting plates 53 are respectively threadedly connected to one end of the bidirectional lead screw 51, and the bidirectional lead screw 51 is divided into two parts with opposite thread rotation directions.

[0042] The first guide rod 52 limits the connecting plate 53, allowing the connecting plate 53 to slide in the axial direction of the bidirectional screw 51. When the bidirectional screw 51 rotates, the connecting plates 53 at both ends of the bidirectional screw 51 move. Since the threads at both ends of the bidirectional screw 51 rotate in opposite directions, the two connecting plates 53 are moved closer to each other or away from each other, which is convenient for synchronously adjusting the connecting plates 53 at both ends, that is, synchronously adjusting the positions of the two baffle bars 4, so that the two baffle bars 4 can maintain good centering.

[0043] Reference Figure 1 and Figure 2 The paving plate 10 is fixedly connected to the connecting plate 53 through a fixing rod 101 , and a connecting rod 102 is provided on the bracket 2 , one end of the connecting rod 102 passes through the connecting plate 53 and is slidably inserted into the fixing rod 101 .

[0044] The paving plate 10 is fixedly connected to the connecting plate 53. During the process of adjusting the position of the connecting plate 53, the paving plate 10 moves synchronously, that is, the paving plate 10 and the supporting plate 41 are adjusted synchronously, so as to maintain the position relationship of the structure without multiple adjustments. The connecting rod 102 is provided to help improve the stability of the device.

[0045] Reference Figure 2 A first rotating block 511 is fixedly connected to the middle of the bidirectional lead screw 51.

[0046] It is convenient for the staff to manually rotate the bidirectional lead screw 51 to adjust the position of the baffle bar 4.

[0047] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 The control member 8 includes a control screw 81, a second guide rod 82 and a moving plate 83. The control screw 81 is vertically arranged, passes through the support frame 6 in a threaded connection manner and is rotatably connected to the top surface of the moving plate 83, the second guide rod 82 is vertically arranged, passes through the support frame 6 in a sliding connection manner and is fixedly connected to the top surface of the moving plate 83, and the flattening block 7 is detachably connected to the bottom surface of the moving plate 83 in a threaded connection manner.

[0048] The second guide rod 82 limits the movement direction of the movable plate 83, so that the movable plate 83 reciprocates in the vertical direction. By rotating the control screw 81, the position of the movable plate 83 and the flattening block 7 can be adjusted, so that the flattening block 7 can flatten the calendered film, so that the film fits with the side of the baffle 4 and the top surface of the workbench 1 between the two baffles 4, so that it is convenient to add raw materials to the film, and reduce the risk of the film being broken due to excessive force during the calendering process. The flattening block 7 is detachably connected to the movable plate 83, so that the flattening block 7 can be replaced according to the distance between the two baffles 4, so that the flattening block 7 can cooperate with the two baffles 4, and the application range of the device is expanded.

[0049] Reference Figure 2 A second rotating block 811 is fixedly connected to the top of the control screw 81.

[0050] It is convenient for the staff to manually rotate the bidirectional lead screw 51 to adjust the position of the movable plate 83, that is, to adjust the position of the flattening block 7.

[0051] Reference Figure 2 and Figure 5 A through groove is provided on the workbench 1 which passes through the workbench 1 in the vertical direction. One of the rollers 3 is arranged below the workbench 1 and its top surface is flush with the surface of the workbench 1. The other roller 3 and two support plates 41 are vertically slidably connected to the bracket 2. The baffle 4 is detachably connected to the bottom surface of the support plate 41 in a sliding connection.

[0052] It is convenient to adjust the distance between the two rollers 3. The baffle 4 is detachably connected to the bottom surface of the support plate 41, so that a suitable baffle 4 can be selected according to the distance between the rollers 3, thereby ensuring the blocking effect of the baffle 4 and the support plate 41 on the edge of the sheet and improving the neatness and uniformity of the edge of the sheet.

[0053] Reference Figure 2 and Figure 5 Both ends of the roller 3 located above are fixedly connected to support blocks 12, both ends of the bidirectional lead screw 51 and the first guide rod 52 are respectively connected to a support block 12, the two fixed rods 101 correspond to the two support blocks 12 in a fixed connection manner, and the bracket 2 is provided with a sliding member 13 which corresponds to the two support blocks 12 one by one and can adjust the vertical position of the support block 12.

[0054] The support block 12 is provided to facilitate synchronous adjustment of the positions of the roller 3 and the support plate 41 .

[0055] Reference Figure 1 and Figure 5The sliding member 13 includes a motor 131, a third lead screw 132 and three third guide rods 133. The third lead screw 132 is vertically arranged, and the third lead screw 132 is fixedly connected to the output end of the motor 131. The three third guide rods 133 are all vertically placed and pass through the support block 12 in a sliding connection manner. The three third guide rods 133 are arranged in the long side direction of the workbench 1, and the third lead screw 132 passes through the support block 12 in a threaded connection manner.

[0056] The motor 131 drives the third lead screw 132 to rotate, so as to adjust the vertical height of the two support blocks 12, which is convenient for use. The three third guide rods 133 are provided to help improve the stability of the device.

[0057] The implementation principle of a calender in the embodiment of the present invention is:

[0058] The film is laid on the surface of the workbench 1, with both ends of the film located on the top surface of the support plate 41. The flattening block 7 and the flattening wheel 9 move downward to unfold the film, so that the film fits with the top surface of the support plate 41, the side surface of the baffle 4 and the surface of the support plate 41 between the two baffles 4. The film is transported forward, and the paving plate 10 limits the position of the film on the support plate 41. The raw material is poured on the film. During the rotation of the roller 3, the other film is driven to move so that the raw material is located between the two films. The two rollers 3 rotate in opposite directions so that the two films and the raw material between the films are transported along the long side direction of the workbench 1, and the two rollers 3 cooperate to calender the raw material between the two films. During the calendering process, the baffle 4 and the support plate 41 limit the edge of the sheet.

[0059] If the spacing between the two baffles 4 needs to be adjusted, the bidirectional lead screw 51 is rotated, and the matching flattening block 7 is replaced after the adjustment. If the spacing between the two rollers 3 needs to be adjusted, the motor 131 is started, and the matching baffles 4 are replaced after the adjustment.

[0060] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A calender, comprising a workbench, two brackets and two rollers, wherein the rollers are rotatably supported between the two brackets, and the two rollers cooperate to calender the raw materials on the workbench, characterized in that: Also includes: Two baffles are set on the workbench, and the baffles are made of hard aluminum strips; A spacing adjustment member is arranged between the two brackets, and the spacing adjustment member is used to adjust the spacing between the two stop bars; a support frame is arranged on the workbench, and a flattening block is vertically slidably connected to the support frame, and a control member for making the flattening block slide vertically is arranged on the support frame, and flattening wheels that can match the top surface of the support plate are connected to both ends of the flattening block, and the raised part in the middle of the flattening block (7) is slidably inserted between the two stop bars, and a horizontally placed support plate is connected to the stop bar, and a paving plate matching the roller is arranged on the support plate, and a plurality of paving wheels are connected to the bottom surface of the paving plate; The spacing adjustment member includes a bidirectional screw, a first guide rod and two connecting plates, the bidirectional screw is rotatably arranged between the two brackets, the first guide rod is horizontally arranged between the two brackets, the two connecting plates are vertically placed, the two connecting plates are respectively fixedly connected to a support plate, the first guide rod passes through the two connecting plates in a sliding connection, the two connecting plates are respectively threadedly connected to one end of the bidirectional screw, and the threads at both ends of the bidirectional screw have opposite rotation directions; The paving plate is fixedly connected to the connecting plate through a fixing rod, and a connecting rod is arranged on the bracket, one end of the connecting rod passes through the connecting plate and is slidably inserted into the fixing rod; Both ends of the roller located above are fixedly connected to support blocks, the two ends of the bidirectional screw and the first guide rod are respectively connected to a support block, the two fixed rods correspond to the two support blocks in a fixed connection manner, and the bracket is provided with a sliding member that corresponds to the two support blocks one by one and can adjust the vertical position of the support blocks.

2. A calender according to claim 1, characterized in that: A first rotating block is fixedly connected to the middle of the bidirectional lead screw.

3. A calender according to claim 1, characterized in that: The control component includes a control screw, a second guide rod and a movable plate. The control screw passes through the support frame in a threaded connection manner and is rotatably connected to the top surface of the movable plate. The second guide rod passes through the support frame in a sliding connection manner and is fixedly connected to the top surface of the movable plate. The flattening block is detachably connected to the bottom surface of the movable plate in a threaded connection manner.

4. A calender according to claim 3, characterized in that: The top of the control screw is fixedly connected with a second rotating block.

5. A calender according to claim 1, characterized in that: A through groove is provided on the workbench, wherein one roller is arranged below the workbench and its top surface is flush with the workbench surface, the other roller and two support plates are vertically slidably connected to the bracket, and the baffle is detachably connected to the bottom surface of the support plate in a sliding connection manner.

6. A calender according to claim 1, characterized in that: The sliding member includes a motor, a third lead screw and a plurality of third guide rods, the third lead screw is fixedly connected to the output end of the motor, the plurality of third guide rods are vertically placed and pass through the support block in a sliding connection, and the third lead screw passes through the support block in a threaded connection.

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