A plastic PVC sheet cutting surface grinding device

Abstract

This invention belongs to the field of PVC sheet cutting surface grinding technology, and particularly relates to a plastic PVC sheet cutting surface grinding device, comprising: a base, and a platform disposed above the base. The PVC sheet is flexibly pre-positioned through the elastic pre-clamping mode of the extrusion assembly, achieving pre-clamping of the PVC sheet. Simultaneously with the pre-clamping of the extrusion assembly, an outer concentric extrusion mechanism pushes and aligns the sheet, automatically correcting its position to ensure the PVC sheet and platform remain concentric, avoiding eccentric grinding defects. After concentric alignment, the extrusion assembly can quickly switch working modes for secondary hard extrusion and fastening, locking and fixing the aligned PVC sheet. Simultaneously, the grinding section mounted on the concentric extrusion mechanism can adjust and synchronously fit the outer side of the sheet during concentric extrusion, matching the grinding operation position. Then, a rotating assembly drives the PVC sheet to rotate at a uniform speed, automatically completing the continuous circumferential grinding operation of the outer cutting surface of the sheet.

Description

Technical Field

[0001] This invention belongs to the field of PVC sheet cutting surface grinding technology, and particularly relates to a plastic PVC sheet cutting surface grinding device. Background Technology

[0002] Currently, after PVC plastic circular sheets are cut, defects such as burrs, flash, and protruding cutting edges will appear on the cut sides. In order to ensure the smoothness of the sheet's appearance, dimensional accuracy, and subsequent assembly compatibility, the outer cut surface of the sheet must be continuously ground in a 360° circumferential manner.

[0003] Among them, the specialized grinding equipment for the cut surface of circular PVC sheets on the market has several unavoidable technical defects under mass production conditions, which seriously restrict the processing accuracy, finished product yield and workshop production environment. The specific problems are as follows: 1. Poor concentric alignment accuracy of the workpiece, high incidence of eccentric grinding defects, and easy damage to the PVC substrate by clamping. Existing grinding equipment only adopts a single rigid clamping structure. After the operator places the PVC sheet on the table, it is directly and rigidly pressed, without a flexible pre-positioning buffer structure. During manual feeding, the sheet is very prone to center deviation. The equipment lacks an automatic concentric correction mechanism and relies solely on manual adjustment of the sheet position, which has low correction accuracy and is time-consuming. 2. The high temperature of grinding friction can easily cause the PVC sheet to soften, burn and deform. The matching cooling device is expensive. PVC plastic has poor heat resistance. During high-speed circumferential grinding, the grinding head and the cut surface of the sheet will continuously rub against each other and accumulate a lot of heat. Existing equipment grinding heads do not have built-in cooling structures. High temperature will cause the PVC material in the grinding area to wrinkle, blacken, melt and burn at the edges, and destroy the flatness of the cut surface.

[0004] There is an urgent need for improvement, so we propose a grinding device for the cut surface of PVC sheets. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a grinding device for the cut surface of PVC sheets, achieving a stable grinding effect on the cut surface of PVC sheets.

[0006] In view of this, the present invention provides a grinding device for the cut surface of PVC sheet plastic, comprising: A base, with a platform on top of the base, and a rotating component on top of the platform; The extrusion assembly is located at the bottom of the platform. The extrusion assembly can push the PVC sheet to engage with the rotating assembly. The extrusion assembly has two working modes: elastic pre-clamping mode and rigid clamping mode. A concentric extrusion mechanism is provided on the outside of the shelf. When the extrusion assembly is in the elastic pre-clamping mode, the concentric extrusion mechanism can push the PVC sheet in alignment so that the PVC sheet and the shelf remain concentric. The grinding section is installed at one end of the concentric extrusion mechanism near the table, and can be synchronously aligned and bonded to the side of the PVC sheet. The cooling and impurity removal mechanism is driven and cooperates with the rotating component. The cooling and impurity removal mechanism can be driven by the rotating component in operation to work synchronously. On the one hand, it cools and lowers the temperature of the grinding part in real time, and on the other hand, it blows and removes the grinding impurities generated on the side of the PVC sheet during grinding. A dust-blocking part is provided on the concentric extrusion mechanism.

[0007] Furthermore, the concentric extrusion mechanism includes a support cover, which is disposed below the platform. A support plate is disposed above the platform. Both the support plate and the support cover have several through slots. A rocker arm is rotatably connected in the through slot. A pressure plate is disposed above the support plate and below the support cover. Several second limiting slots are disposed on the pressure plate. A second limiting block is slidably connected in the second limiting slot. The second limiting block is fixedly connected to one end of the corresponding rocker arm. The through slots on the support plate and the through slots on the support cover are staggered.

[0008] Furthermore, it also includes a drive assembly, which includes a drive base fixedly installed on the top of the base. A first motor is fixedly installed on the top of the drive base. The output end of the first motor is fixedly connected to a bidirectional lead screw through the top of the drive base. The other end of the bidirectional lead screw is rotatably connected to the inner wall of the drive base. Both ends of the bidirectional lead screw are threadedly connected to moving blocks. The moving blocks slide in cooperation with the inner cavity of the drive base. The end of the moving block away from the drive base is fixedly connected to a corresponding pressure plate.

[0009] Furthermore, a limiting seat is fixedly connected to one end of the base away from the drive seat. A first limiting groove is provided in the limiting seat. A first limiting block is slidably connected to both ends of the first limiting groove. The first limiting block is fixedly connected to the corresponding pressure plate. A fixing frame is fixedly connected to both ends of the support cover and the support plate. The other end of each fixing frame is fixedly connected to the corresponding drive seat and the limiting seat.

[0010] Furthermore, the rotating assembly includes a second motor, which is fixedly mounted on the top of the tray. The output end of the second motor passes through the tray and is fixedly connected to a turntable, which corresponds to the storage platform.

[0011] Furthermore, the extrusion assembly includes several storage slots, which are opened through the platform. A stop rod is slidably connected inside the storage slot. A protrusion is fixedly connected to the top of the stop rod. A spring is sleeved on the end of the stop rod away from the protrusion. The two ends of the spring are fixedly connected to the stop rod and the top of the platform, respectively. A top rod is rotatably connected to the middle of the bottom of the platform. The top rod passes through the support cover and is fixedly installed on the pressure plate at the bottom. The other end of the connecting frame is fixedly connected to the output end of the electric push rod. The electric push rod is fixedly installed on the bottom side of the pressure plate at the bottom.

[0012] Furthermore, the grinding section includes several adjusting covers, which are fixedly connected to one end of the lifting arm near the table. A first grinding head is movably installed in the adjusting cover near the tray, and a second grinding head is movably installed in the adjusting cover near the tray cover. Adjusting bolts are threadedly connected to the side walls of the adjusting covers, and the ends of the adjusting bolts abut against the corresponding first and second grinding heads.

[0013] Furthermore, the cooling and impurity removal mechanism includes several cavities, each cavity being respectively opened within a corresponding first grinding head and second grinding head. Both sides of the first and second grinding heads are connected to connectors, which communicate with the corresponding cavities. A first pipe connects the two corresponding connectors of the first and second grinding heads on the same lifting arm. Several spray holes are opened on the side of the first and second grinding heads facing the platform, and these spray holes communicate with the corresponding cavities. The spray holes of the first grinding head extend downwards at an angle from the cavity within the first grinding head, and the spray holes of the second grinding head extend upwards at an angle from the cavity within the second grinding head. The output end of the second motor is fixedly connected to a gear ring, and gears mesh on both sides of the gear ring. The gears are rotatably connected to the bottom of the support plate, and a drive arm is rotatably connected to the gear. The other end of the drive arm is rotatably connected to a pressing rod, and the other end of the pressing rod is fixedly connected to a sealing plug. The sealing plug is movably connected to the inner cavity of the sealing cylinder. The inner cavity of the sealing cylinder is connected to a second pipe and a third pipe respectively. The other ends of the two second pipes are connected to a filter box. The filter box is fixedly installed on the top of the support plate, and a filter element is detachably installed inside the filter box. The other end of the third pipe is connected to the corresponding first pipe. A one-way valve is installed on both the second pipe and the third pipe.

[0014] Furthermore, the dustproof part includes a plurality of first covers, the first covers being fixedly connected to the top of the adjustable cover, and second covers being fixedly connected to the top of the adjustable arm. The first covers and the second covers are staggered, and the sides of the first covers and the sides of the second covers are adapted to each other. Each of the first covers and the second covers can form an umbrella-shaped enclosed dustproof cover.

[0015] Furthermore, a collection section is provided in the middle of the support cover. The collection section is funnel-shaped and corresponds to the first cover and the second cover. The collection section is connected to a slag discharge pipe.

[0016] The beneficial effects of this invention are: The PVC sheet can be pre-positioned flexibly by the elastic pre-clamping mode of the extrusion component. In the synchronous state of the extrusion component pre-clamping, the sheet is aligned and pushed by the outer concentric extrusion mechanism, which automatically corrects the position of the sheet so that the PVC sheet and the platform always remain concentric, avoiding the defects of eccentric grinding. In addition, multiple first and second covers are also driven synchronously with the concentric extrusion mechanism, and merge into an umbrella shape to block the splashing of waste. After concentric alignment and calibration, the extrusion assembly can quickly switch working modes to perform secondary hard extrusion and fastening, locking and fixing the aligned PVC sheet. At the same time, the grinding part mounted on the concentric extrusion mechanism can adjust and fit synchronously with the outer side of the sheet to match the grinding operation position. Then, the rotating assembly drives the PVC sheet to rotate at a uniform speed, automatically completing the continuous circumferential grinding operation on the outer cut surface of the sheet. During the operation of the rotating component driving the sheet to rotate and polish, the cooling and impurity removal mechanism can be driven to operate synchronously to continuously cool and reduce the temperature of the polishing part in operation, preventing PVC sheet deformation and scorching of the polishing surface caused by high temperature. At the same time, it can simultaneously blow away the fine impurities and waste generated during polishing to ensure that the polishing surface is clean and flat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 2 This is a schematic diagram of the concentric extrusion mechanism of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 3 This is a schematic diagram of the extrusion assembly structure of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 4 This is a schematic diagram of the drive component structure of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 5 This is a schematic diagram of the first part of the structure of the grinding part and the concentric extrusion mechanism of the plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 6 This is a schematic diagram of the second part of the structure of the grinding part and the concentric extrusion mechanism of the plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 7This is a first-view structural diagram of the cooling and impurity removal mechanism of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 8 This is a second-view structural schematic diagram of the cooling and impurity removal mechanism of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the cooling and impurity removal mechanism of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 10 This is a schematic diagram of the distribution structure of the first and second grinding heads of a plastic PVC sheet cutting surface grinding device proposed in this invention; Figure 11 This is a schematic diagram of the combined structure of the first and second covers of a plastic PVC sheet cutting surface grinding device proposed in this invention; The markings in the diagram are as follows: 1. Base; 11. Drive seat; 12. First motor; 13. Double-acting lead screw; 14. Moving block; 15. Limiting seat; 16. First limiting groove; 17. First limiting block; 18. Fixing frame; 2. Storage platform; 21. Support cover; 211. Collection part; 212. Slag discharge pipe; 22. Support plate; 23. Through groove; 24. Raising arm; 25. Pressure plate; 26. Second limiting groove; 27. Second limiting block; 3. Storage groove; 31. Support rod; 32. Protrusion; 33. Spring; 34. Top rod 35. Connecting frame; 36. Electric push rod; 37. Second motor; 38. Turntable; 4. Adjusting cover; 41. Connector; 42. First grinding head; 43. Adjusting bolt; 44. Second grinding head; 45. First tube; 46. First cover; 47. Second cover; 48. Cavity; 49. Spray hole; 5. Gear ring; 51. Gear; 52. Drive arm; 53. Extrusion rod; 54. Sealing plug; 55. Sealing cylinder; 56. Second tube; 57. Filter box; 58. Filter element; 59. Third tube. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0020] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0023] Reference Figures 1 to 11 A device for grinding the cut surface of PVC sheet plastic, comprising: A base 1, a shelf 2 is provided on the base 1, and a rotating component is provided on the shelf 2; The extrusion assembly is located at the bottom of the platform 2. The extrusion assembly can push the PVC sheet to engage with the rotating assembly. The extrusion assembly has two working modes: elastic pre-clamping mode and rigid clamping mode, which can realize the graded operation of pre-positioning and stable clamping of PVC sheet. The concentric extrusion mechanism is located on the outside of the shelf 2. When the extrusion assembly is in the elastic pre-clamping mode, the concentric extrusion mechanism can push the PVC sheet in alignment so that the PVC sheet and the shelf 2 remain concentric. The grinding section is installed at one end of the concentric extrusion mechanism near the table 2. During the process of the concentric extrusion mechanism performing concentric alignment and extrusion on the PVC sheet, the grinding section is simultaneously aligned and attached to the side of the PVC sheet. It can complete the continuous grinding operation on the cut side of the PVC sheet as the PVC sheet rotates with the rotating component. The cooling and impurity removal mechanism is driven by the rotating component. The cooling and impurity removal mechanism can be driven by the rotating component in operation to work synchronously. On the one hand, it cools down the grinding part in real time during operation, and on the other hand, it blows away the grinding impurities generated on the side of the PVC sheet during grinding. The dust-blocking section is installed on the concentric extrusion mechanism. After the concentric extrusion mechanism completes the position adjustment and alignment of the PVC sheet, the dust-blocking section can form an umbrella-shaped dustproof structure, effectively preventing the waste chips generated during the grinding operation from flying outward.

[0024] After the staff places the PVC sheet to be polished on the surface of the platform 2, the device first activates the elastic pre-clamping mode of the extrusion assembly. Spring 33 drives the abutment rod 31 and protrusion 32 to flexibly press against the bottom of the PVC sheet, providing a soft initial restraint. This achieves material pre-fixation while retaining a slight adjustable gap, preventing direct damage to the PVC material from rigid clamping. Simultaneously with the elastic pre-clamping restraint, the concentric extrusion mechanism on the outside of the platform 2 is activated, symmetrically pushing and aligning the sheet from all four sides. This allows for real-time fine-tuning of the sheet's placement, automatically correcting any deviations to ensure the center of the PVC sheet is aligned with the platform. 2. The centers are completely aligned, eliminating the possibility of eccentricity or uneven grinding during subsequent polishing. Once the sheet is concentrically aligned, the extrusion assembly automatically switches to a rigid clamping mode. The electric push rod 36 pushes the push rod 34 and connecting frame 35, causing the abutment rod 31 to rigidly lock, thus firmly pressing the PVC sheet and completely locking its position. This prevents loosening, offset, vibration, or displacement during high-speed polishing. Simultaneously, the polishing section at the end of the concentric extrusion mechanism's lifting arm 24 automatically aligns with the outer cut edge of the PVC sheet during the concentric extrusion adjustment, adapting to the polishing station without requiring manual alignment. Subsequently, the rotating assembly starts, driving the turntable 38 to rotate at a constant speed via the second motor 37, which in turn drives the PVC sheet on the platform 2 to rotate continuously 360°, allowing the grinding section attached to the side of the sheet to perform continuous circumferential grinding on the cut surface of the sheet. While the rotating assembly is grinding, it also drives the cooling and impurity removal mechanism to operate synchronously via the end gear ring 5 meshing with the gear 51, eliminating the need for separate power sources such as fans and motors, thus achieving simultaneous grinding and cooling / impurity removal. The stable airflow generated by the mechanism is delivered to the inside of the grinding head, continuously carrying away the high temperature generated by grinding friction, thus grinding the grinding head and the PVC sheet. The surface is cooled in real time to prevent PVC from softening, deforming, or scorching at high temperatures. On the other hand, the top and bottom sides of the sheet are swept bidirectionally by the up-and-down tilting nozzles 49 to clean up the powder and debris generated during grinding, ensuring that the grinding surface is clean and flat. During the entire process of adjusting the alignment and bonding of the concentric extrusion mechanism for grinding, the dust-proof part mounted on it will synchronously and adaptively adjust its position with the lifting arm 24. When the sheet alignment and locking are completed, the first cover 46 and the second cover 47 automatically close to form a closed umbrella-shaped dustproof structure, covering the grinding operation area above, blocking the splashing and flying debris and dust during the grinding process in real time, and preventing dust from overflowing and polluting the environment.

[0025] In the example of this application, the concentric extrusion mechanism includes a support cover 21, which is located below the platform 2. A support plate 22 is located above the platform 2. Both the support plate 22 and the support cover 21 have several through slots 23. A rotating shaft is rotatably connected to the through slot 23 via a bearing. A rocker arm 24 is fixedly connected to the rotating shaft. A pressure plate 25 is located above the support plate 22 and below the support cover 21. Several second limiting slots 26 are located on the pressure plate 25. A second limiting block 27 is slidably connected to the second limiting slot 26. The second limiting block 27 is fixedly connected to one end of the corresponding rocker arm 24. The through slots 23 on the support plate 22 and the through slots 23 on the support cover 21 are staggered. When the pressure plates 25 located at the top and bottom move towards the platform 2 simultaneously, the pressure plates 25 will squeeze each rocker arm 24, causing the rocker arm 24 to rotate along the through slot 23. The other end of the rocker arm 24 can squeeze the PVC sheet on the platform 2.

[0026] As a preferred example of this utility model, during operation, the top and bottom pressure plates 25 move synchronously toward the platform 2. During the movement of the pressure plates 25, they will squeeze the rocker arms 24 inserted inside the through groove 23, causing the rocker arms 24 to rotate around the through groove 23. By using the synchronous and symmetrical rotation of the upper and lower rocker arms 24, the PVC sheet is squeezed and pushed inward from the upper and lower outer sides. Through the bidirectional symmetrical squeezing method, the offset deviation of the sheet can be corrected in all directions, ensuring that the sheet is concentric with the platform 2, avoiding the problem of sheet tilting and misalignment caused by unilateral squeezing, and preventing damage to the edge of the sheet.

[0027] In the example of this application, a drive assembly is also included. The drive assembly includes a drive seat 11, which is fixedly installed on the top of the base 1. A first motor 12 is fixedly installed on the top of the drive seat 11. A bidirectional lead screw 13 is fixedly connected to the output end of the first motor 12 through the top of the drive seat 11. The other end of the bidirectional lead screw 13 is rotatably connected to the inner wall of the drive seat 11 through a bearing. Both ends of the bidirectional lead screw 13 are threadedly connected to moving blocks 14. The moving blocks 14 slide in the inner cavity of the drive seat 11. The end of the moving block 14 away from the drive seat 11 is fixedly connected to the corresponding pressure plate 25.

[0028] As a preferred example of this utility model, during operation, the first motor 12 starts and drives the bidirectional lead screw 13 to rotate. Utilizing the structural characteristics of the reverse threads at both ends of the bidirectional lead screw 13, the moving blocks 14 at both ends of the lead screw are driven to slide synchronously, equidistantly, and in opposite directions. The two moving blocks 14 are fixedly connected to the upper and lower pressure plates 25 respectively, thereby driving the two sets of pressure plates 25 to move synchronously closer to or synchronously away from the platform 2.

[0029] In the example of this application, the end of the base 1 away from the drive seat 11 is fixedly connected to the limiting seat 15. The limiting seat 15 is provided with a first limiting groove 16. Both ends of the first limiting groove 16 are slidably connected to a first limiting block 17. The first limiting block 17 is fixedly connected to the corresponding pressure plate 25. Both ends of the support cover 21 and the support plate 22 are fixedly connected to a fixing frame 18. The other end of each fixing frame 18 is fixedly connected to the corresponding drive seat 11 and the limiting seat 15 respectively.

[0030] As a preferred example of this utility model, during the sliding process of the pressure plate 25, the first limiting blocks 17 at both ends are always locked inside the first limiting groove 16 of the limiting seat 15 and slide. Relying on the constraint of the limiting groove, the horizontal displacement and vertical sway of the pressure plate 25 are restricted, ensuring that the pressure plate 25 moves smoothly and linearly throughout the entire process. At the same time, the support cover 21 and the support plate 22 are fixed to the drive seat 11 and the limiting seat 15 respectively through the fixing brackets 18 at both ends, forming a stable support frame, which greatly improves the stability of equipment operation and service life.

[0031] In the example of this application, the rotating component includes a second motor 37, which is fixedly mounted on the top of the tray 22. The output end of the second motor 37 passes through the tray 22 and is fixedly connected to a turntable 38, which corresponds to the shelf 2.

[0032] As a preferred example of this utility model, during operation, the second motor 37 starts and drives the turntable 38 to rotate at a constant speed. The turntable 38 directly drives the PVC sheet locked and fixed on the platform 2 to rotate synchronously at a constant speed of 360°.

[0033] In the example of this application, the extrusion assembly includes several storage slots 3, which are opened through the platform 2. A stop rod 31 is slidably connected in the storage slot 3. A protrusion 32 is fixedly connected to the top of the stop rod 31. A spring 33 is sleeved on the end of the stop rod 31 away from the protrusion 32. The two ends of the spring 33 are fixedly connected to the stop rod 31 and the top of the platform 2, respectively. A top rod 34 is rotatably connected to the bottom of the platform 2 through a bearing. The top rod 34 passes through the support cover 21 and is fixedly installed on the pressure plate 25 at the bottom. A connecting frame 35 is fixedly installed on the bottom of the pressure plate 25 at the bottom. The other end of the connecting frame 35 is fixedly connected to the output end of the electric push rod 36. The electric push rod 36 is fixedly installed on the bottom side of the pressure plate 25 at the bottom. A sealing block is fixedly connected to the bottom of the stop rod 31 to prevent the stop rod 31 from falling off. The storage slot 3 is adapted to the protrusion 32.

[0034] As a preferred example of this utility model, during the initial alignment stage of the equipment, the storage groove 3 inside the platform 2, the spring 33, and the abutment rod 31 work together to achieve an elastic pre-clamping mode. The spring 33 flexibly clamps the sheet material, which can not only initially limit the material but also cooperate with the alignment fine-tuning action of the concentric extrusion mechanism to adaptively adjust the support position, avoiding hard extrusion that scratches or deforms the PVC sheet. After the sheet is concentrically aligned, the electric push rod 36 starts to push the push rod 34, which drives the abutment rod 31 to move downward and lock, switching to a rigid clamping mode. This rigidly fixes the position of the sheet material and forms a locking cooperation with the concentric extrusion mechanism and the rotary grinding mechanism, preventing loosening, shaking, and displacement of the sheet material during high-speed rotary grinding. At the same time, the sealing block at the bottom of the abutment rod 31 can effectively prevent the abutment rod 31 from falling off, ensuring the stability of the structure. The storage groove 3 and the protrusion 32 are compatible, and in the rigid clamping mode, the protrusion 32 can be stored in the storage groove 3.

[0035] In the example of this application, the grinding part includes several adjustment covers 4. The adjustment covers 4 are fixedly connected to one end of the lifting arm 24 near the table 2. A first grinding head 42 is movably installed in the adjustment cover 4 near the tray 22, and a second grinding head 44 is movably installed in the adjustment cover 4 near the tray 21. Adjustment bolts 43 are threadedly connected to the side walls of the adjustment covers 4. The ends of the adjustment bolts 43 abut against the corresponding first grinding head 42 and second grinding head 44.

[0036] As a preferred example of this utility model, multiple sets of adjusting covers 4 are fixed one-to-one at the ends of each lifting arm 24 near the platform 2. They can move and align synchronously with the lifting arm 24, achieving adaptive linkage adjustment of the grinding station. The first grinding head 42 is movably installed inside the adjusting cover 4 near the upper support plate 22, and the second grinding head 44 is movably installed inside the adjusting cover 4 near the lower support plate 21. The two sets of grinding heads cooperate with each other, respectively corresponding to the upper and lower edges of the cut side of the PVC sheet, achieving full-range coverage grinding of the sheet side and avoiding the problem of incomplete grinding on one side. At the same time, each adjusting cover 4 has an adjusting bolt 43 threaded on its side wall, with the bolt end directly abutting the side of the corresponding grinding head. During daily operation, the operator can adjust the grinding head by rotating the adjusting bolt 43 to push it back and forth inside the adjusting cover 4, finely adjusting the extension length and contact distance of the grinding head, according to the thickness of the PVC sheet, the grinding allowance, and the grinding precision requirements, flexibly adapting to the grinding needs of different specifications of sheets.

[0037] In the example of this application, the cooling and impurity removal mechanism includes several cavities 48, each cavity 48 being respectively opened within a corresponding first grinding head 42 and second grinding head 44. Both sides of the first grinding head 42 and second grinding head 44 are connected to connectors 41, and the connectors 41 are connected to the corresponding cavities 48. A first pipe 45 connects the two connectors 41 corresponding to the first grinding head 42 and second grinding head 44 on the same lifting arm 24. The first grinding head 42 and second grinding head 44 face one side of the platform 2. Each side has several spray holes 49, which are connected to corresponding cavities 48. The spray holes 49 of the first grinding head 42 extend downward at an angle from the cavity 48 inside the first grinding head 42, and are used to clean the bottom edge of the PVC sheet. The spray holes 49 of the second grinding head 44 extend upward at an angle from the cavity 48 inside the second grinding head 44, and are used to clean the top edge of the PVC sheet. The output end of the second motor 37 is fixedly connected to a gear ring 5. Gears 51 mesh on both sides of the gear ring 5. The gears 51 are rotatably connected to the bottom of the support plate 22. A drive arm 52 is rotatably connected to the gear 51 through a bearing. The other end of the drive arm 52 is rotatably connected to a pressing rod 53 through a bearing. The other end of the pressing rod 53 is fixedly connected to a sealing plug 54. The sealing plug 54 is movably connected to the inner cavity of the sealing cylinder 55. The inner cavity of the sealing cylinder 55 is connected to a second pipe 56 and a third pipe 59, respectively. The other ends of the two second pipes 56 are connected to a filter box 57. The filter box 57 is fixedly installed on the top of the support plate 22. The filter box 57 can be detachably installed inside. There is a filter element 58, and the other end of the third tube 59 is connected to the corresponding first tube 45. It is used to deliver gas to the cavity 48 of the first grinding head 42 and the second grinding head 44. It not only cools the grinding head and prevents the high-temperature PVC sheet from deforming, but also sprays it out from the nozzle 49 to clean the top and bottom of the PVC sheet. The first tube 45 is used to connect the cavities 48 in each of the first grinding head 42 and the second grinding head 44. The second tube 56 and the third tube 59 are both equipped with one-way valves.

[0038] It should be noted that the grinding surfaces of the multiple first grinding heads 42 correspond to the top outer side of the PVC sheet, and the grinding surfaces of the multiple second grinding heads 44 correspond to the bottom outer side of the PVC sheet. The first tube 45 connecting the first grinding heads 42 and the second grinding heads 44 is respectively arranged above and below the PVC sheet, and the first tube 45 is a flexible tube, so it will not cause movement interference.

[0039] As a preferred example of this utility model, when the second motor 37 drives the sheet to rotate and grind, the gear ring 5 at the output end synchronously meshes with the gears 51 on both sides to rotate, thereby driving the drive arm 52 and the extrusion rod 53 to swing back and forth, driving the sealing plug 54 to move back and forth inside the sealing cylinder 55, forming a continuous and stable pumped airflow; the airflow is introduced into the first pipe 45 through the third pipe 59, and evenly distributed to the internal cavities 48 of the first grinding head 42 and the second grinding head 44. Part of the airflow continuously carries away the high temperature of grinding friction during the grinding process, cooling the grinding head and the grinding surface of the sheet in real time, preventing the PVC from deforming and turning black at high temperature; A portion of the airflow passes through the vertically inclined nozzles 49, which are directed at the bottom and top of the sheet grinding edge to perform high-pressure blowing, thereby removing dust and debris generated during grinding and preventing impurities from adhering and causing grinding scratches. At the same time, one-way valves are installed on the second pipe 56 and the third pipe 59 to strictly control the unidirectional flow of airflow, ensuring that the purified gas in the filter box 57 is introduced into the piston cylinder, and the gas in the piston cylinder is introduced into the internal cavity 48 of the corresponding first grinding head 42 and second grinding head 44. The top of the filter box 57 is detachably equipped with a cover, which allows the filter element 58 inside the filter box 57 to be removed and cleaned.

[0040] In the example of this application, the dustproof part includes a plurality of first covers 46, the first covers 46 being fixedly connected to the top of the adjusting cover 4, and second covers 47 being fixedly connected to the top of the lifting arm 24. The first covers 46 and the second covers 47 are staggered, and the sides of the first covers 46 and the sides of the second covers 47 are adapted to each other. Each first cover 46 and the second cover 47 can form an umbrella-shaped enclosed dustproof cover to block the grinding debris. After the first cover 46 and the second cover 47 are closed, a gap is formed between the inner wall of the first cover 46 and the second cover 47 and the outer wall of the turntable 38 to avoid friction between the turntable 38 and the inner wall of the first cover 46 and the second cover 47 when the turntable 38 rotates.

[0041] As a preferred example of this utility model, the first cover 46 and the second cover 47 are fixed on the lifting arm 24 and the adjusting cover 4, respectively, and move synchronously with the squeezing and adjusting action of the lifting arm 24. During the process of sheet alignment and grinding head fitting and positioning, each cover gradually moves closer together. When the sheet is locked and fixed and the grinding station alignment is completed, the staggered first cover 46 and second cover 47 automatically splice together to form a complete umbrella-shaped fully enclosed dust cover, which completely covers the entire circumferential grinding area. During the grinding operation, it can intercept high-speed flying debris and dust, thus avoiding dust overflow that pollutes the workshop environment and harms personnel health.

[0042] In the example of this application, a collection section 211 is provided in the middle of the cover 21. The collection section 211 is funnel-shaped and corresponds to the first cover 46 and the second cover 47. The collection section 211 is connected to a slag discharge pipe 212, and a cap is threaded to the end of the slag discharge pipe 212 away from the collection section 211.

[0043] As a preferred example of this utility model, the grinding debris intercepted by the umbrella-shaped dust baffle falls naturally under the influence of gravity within the sealed dustproof space. Simultaneously, with the directional airflow guidance of the cooling and impurity removal mechanism, it converges into the funnel-shaped collection section 211 in the middle of the support cover 21. The funnel-shaped structure has a good slag collection and guiding effect, which can cover the circumferential grinding debris scattered range, preventing debris from accumulating in equipment gaps and worktables. After the operation is completed, the operator can unscrew the cap at the bottom of the slag discharge pipe 212 to quickly discharge and clean up the accumulated debris. The operation is simple and convenient.

[0044] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A device for grinding the cut surface of PVC sheet plastic, characterized in that... ,include: A base (1) is provided above the base (1), and a platform (2) is provided above the platform (2); The extrusion assembly is located at the bottom of the platform (2). The extrusion assembly can push the PVC sheet to dock with the rotating assembly. The extrusion assembly has two working modes: elastic pre-clamping mode and rigid clamping mode. The concentric extrusion mechanism is located on the outside of the platform (2). When the extrusion assembly is in the elastic pre-clamping mode, the concentric extrusion mechanism can push the PVC sheet in alignment so that the PVC sheet and the platform (2) remain concentric. The grinding section is installed at one end of the concentric extrusion mechanism near the table (2) and can be synchronously aligned and attached to the side of the PVC sheet. The cooling and impurity removal mechanism is driven and cooperates with the rotating component. The cooling and impurity removal mechanism can be driven by the rotating component in operation to work synchronously. On the one hand, it cools and lowers the temperature of the grinding part in real time, and on the other hand, it blows and removes the grinding impurities generated on the side of the PVC sheet during grinding. A dust-blocking part is provided on the concentric extrusion mechanism.

2. The plastic PVC sheet cutting surface grinding device according to claim 1, characterized in that, The concentric extrusion mechanism includes a support cover (21), which is located below the platform (2). A support plate (22) is located above the platform (2). Both the support plate (22) and the support cover (21) have several through slots (23). A rocker arm (24) is rotatably connected in the through slot (23). A pressure plate (25) is located above the support plate (22) and below the support cover (21). Several second limiting slots (26) are located on the pressure plate (25). A second limiting block (27) is slidably connected in the second limiting slot (26). The second limiting block (27) is fixedly connected to one end of the corresponding rocker arm (24). The through slots (23) on the support plate (22) and the through slots (23) on the support cover (21) are staggered.

3. The plastic PVC sheet cutting surface grinding device according to claim 2, characterized in that, It also includes a drive assembly, which includes a drive seat (11) fixedly installed on the top of the base (1). A first motor (12) is fixedly installed on the top of the drive seat (11). The output end of the first motor (12) passes through the top of the drive seat (11) and is fixedly connected to a bidirectional lead screw (13). The other end of the bidirectional lead screw (13) is rotatably connected to the inner wall of the drive seat (11). Both ends of the bidirectional lead screw (13) are threadedly connected to moving blocks (14). The moving blocks (14) slide in the inner cavity of the drive seat (11). The end of the moving block (14) away from the drive seat (11) is fixedly connected to the corresponding pressure plate (25).

4. The plastic PVC sheet cutting surface grinding device according to claim 3, characterized in that, The base (1) is fixedly connected to a limiting seat (15) at one end away from the drive seat (11). A first limiting groove (16) is provided in the limiting seat (15). A first limiting block (17) is slidably connected to both ends of the first limiting groove (16). The first limiting block (17) is fixedly connected to the corresponding pressure plate (25). A fixing frame (18) is fixedly connected to both ends of the support cover (21) and the support plate (22). The other end of each fixing frame (18) is fixedly connected to the corresponding drive seat (11) and the limiting seat (15).

5. The plastic PVC sheet cutting surface grinding device according to claim 4, characterized in that, The rotating assembly includes a second motor (37), which is fixedly mounted on the top of the tray (22). The output end of the second motor (37) passes through the tray (22) and is fixedly connected to a turntable (38), which corresponds to the shelf (2).

6. The plastic PVC sheet cutting surface grinding device according to claim 5, characterized in that, The extrusion assembly includes several storage slots (3), which are opened through the platform (2). A push rod (31) is slidably connected in the storage slot (3). A protrusion (32) is fixedly connected to the top of the push rod (31). A spring (33) is sleeved on the end of the push rod (31) away from the protrusion (32). The two ends of the spring (33) are fixedly connected to the push rod (31) and the top of the platform (2), respectively. A top rod (34) is rotatably connected to the middle of the bottom of the platform (2). The top rod (34) passes through the support cover (21) and is fixedly installed on the pressure plate (25) at the bottom. A connecting frame (35) is fixedly installed on the other end of the connecting frame (35). The electric push rod (36) is fixedly installed on the bottom side of the pressure plate (25) at the bottom.

7. The plastic PVC sheet cutting surface grinding device according to claim 6, characterized in that, The grinding section includes several adjustment covers (4). The adjustment covers (4) are fixedly connected to one end of the lifting arm (24) near the table (2). A first grinding head (42) is movably installed in the adjustment cover (4) near the tray (22), and a second grinding head (44) is movably installed in the adjustment cover (4) near the tray (21). Adjustment bolts (43) are threadedly connected to the side walls of the adjustment covers (4). The ends of the adjustment bolts (43) abut against the corresponding first grinding head (42) and second grinding head (44).

8. The plastic PVC sheet cutting surface grinding device according to claim 7, characterized in that, The cooling and impurity removal mechanism includes several cavities (48), each cavity (48) being respectively opened in the corresponding first grinding head (42) and second grinding head (44). Both sides of the first grinding head (42) and the second grinding head (44) are connected to connectors (41), and the connectors (41) are connected to the corresponding cavities (48). The two connectors (41) corresponding to the first grinding head (42) and the second grinding head (44) on the same lifting arm (24) are connected by a first... The tube (45) has several spray holes (49) on the side of the first grinding head (42) and the second grinding head (44) facing the platform (2). The spray holes (49) are connected to the corresponding cavities (48). The spray holes (49) of the first grinding head (42) extend downward at an angle from the cavity (48) inside the first grinding head (42), and the spray holes (49) of the second grinding head (44) extend upward at an angle from the cavity (48) inside the second grinding head (44). The output end of the second motor (37) is fixedly connected to a gear ring (5), and gears (51) mesh on both sides of the gear ring (5). The gears (51) are rotatably connected to the bottom of the support plate (22). A drive arm (52) is rotatably connected to the gear (51). A pressing rod (53) is rotatably connected to the other end of the drive arm (52). A sealing plug (54) is fixedly connected to the other end of the pressing rod (53). The sealing plug (54) is movably connected to the inner cavity of the sealing cylinder (55). The inner cavity of the sealing cylinder (55) is connected to a second pipe (56) and a third pipe (59). The other ends of the two second pipes (56) are connected to the filter box (57). The filter box (57) is fixedly installed on the top of the support plate (22). A filter element (58) is detachably installed in the filter box (57). The other end of the third pipe (59) is connected to the corresponding first pipe (45). A one-way valve is installed on both the second pipe (56) and the third pipe (59).

9. A plastic PVC sheet cutting surface grinding device according to claim 7, characterized in that, The dustproof part includes several first covers (46), the first covers (46) are fixedly connected to the top of the adjustable cover (4), and the second covers (47) are fixedly connected to the top of the lifting arm (24). The first covers (46) and the second covers (47) are staggered, and the sides of the first covers (46) and the sides of the second covers (47) are adapted to each other. Each first cover (46) and the second cover (47) can form an umbrella-shaped enclosed dustproof cover.

10. A plastic PVC sheet cutting surface grinding device according to claim 9, characterized in that, The support cover (21) is provided with a collection part (211) in the middle. The collection part (211) is funnel-shaped and corresponds to the first cover (46) and the second cover (47). The collection part (211) is connected to the slag discharge pipe (212).

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