Grinding pad preparation equipment

Abstract

The invention discloses grinding pad preparation equipment, and relates to the technical field of grinding pad preparation equipment.The grinding pad preparation equipment comprises two mounting frames, an adjusting mechanism is fixedly arranged below the two mounting frames, an injection cylinder is fixedly arranged at the top of the adjusting mechanism, and a pressure maintaining sleeve is slidably arranged in the injection cylinder; supporting frames are fixedly arranged at the tops of the two mounting frames, a raw material barrel is fixedly arranged between the two supporting frames, and an output pipe is fixedly arranged at the bottom in the raw material barrel. Through the arrangement of the trapezoidal column, the connecting rod, the reciprocating screw rod, the transmission belt, a reciprocating ring, a U-shaped rod, a pressure relief rod, a wedge-shaped block, a mounting ring, a meshing block and two telescopic spring columns, the pressure maintaining pressure, the pressure maintaining time and the circulating pressure maintaining interval time in the whole working process can be adaptively adjusted according to the thickness of the grinding pad, and manual intervention is not needed; the automation degree is high, and operation is simple, convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of grinding pad preparation equipment, in particular to grinding pad preparation equipment. Background Art

[0002] Abrasive pads are a common abrasive tool, mainly used for fine sanding or polishing of objects. Abrasive pads are usually made of hard abrasive materials attached to the surface of epoxy resin, such as diamond, silicon carbide, aluminum oxide, etc. The surface has a certain degree of roughness. Abrasive pads have a wide range of uses and can be applied to the grinding and polishing of metals, glass, gems, ceramics and other materials. When preparing abrasive pads, special processing equipment is usually required.

[0003] The invention patent with patent number CN118219169A discloses an abrasive pad and a processing device thereof, which relates to the technical field of abrasive pad preparation, and includes a processing table, a tank assembly and a positioning assembly. The outer end of the processing table is connected to a support seat, and the outer end of the support seat is connected to a tank assembly. The tank assembly includes a heating tank, a driving wheel, a first motor, a first extrusion rod, a storage tank, a driven wheel, a transmission belt, a second extrusion rod, a first discharge pipe, a second discharge pipe and an electric control baffle. The scheme mixes the epoxy resin with alumina, silicon carbide and corundum when the epoxy resin is in a molten state, which can eliminate the steps of spreading and curing, thereby improving the preparation efficiency of the abrasive pad. In addition, because the transmission ratio of the driving wheel and the driven wheel is fixed, the ratio of epoxy resin to alumina, silicon carbide and corundum can always be kept consistent, which can eliminate the need for manual calculation of the input amount of epoxy resin and alumina, silicon carbide and corundum, thereby making the use of the equipment easier.

[0004] The above-mentioned device mixes the epoxy resin with aluminum oxide, silicon carbide and corundum when the epoxy resin is in a molten state, thereby improving the preparation efficiency of the grinding pad. However, due to the different grinding precisions of different workpieces, even grinding pads of the same size will have different thicknesses. The above-mentioned device cannot adjust the thickness of the cast grinding pad, and as the thickness of the grinding pad changes, its cycle holding time and cycle time interval also need to be changed synchronously. Otherwise, as the thickness of the grinding pad changes, if the holding time is too long or too short, the grinding pad will crack or become deformed, resulting in a low yield of the grinding pad. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a polishing pad preparation device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grinding pad preparation device, comprising two mounting frames, wherein an adjustment mechanism is fixedly arranged below the two mounting frames, an injection cylinder is fixedly arranged on the top of the adjustment mechanism, a pressure-maintaining sleeve is slidably arranged inside the injection cylinder, a support frame is fixedly arranged on the top of the two mounting frames, a raw material cylinder is fixedly arranged between the two support frames, an output tube is fixedly arranged at the bottom of the raw material cylinder, the output tube is connected with the injection cylinder, an input tube is fixedly arranged on the side wall of the raw material cylinder, an L-shaped mounting plate is fixedly arranged on the top of one of the mounting frames, a driving motor is fixedly arranged on the top of the L-shaped mounting plate, a connecting column is fixedly arranged on the end of the output shaft of the driving motor, an injection screw is fixedly arranged on the bottom of the connecting column, a reciprocating mechanism is arranged on the upper sleeve of the connecting column, a pressure-maintaining mechanism for adaptively adjusting the pressure according to the thickness of the grinding pad is arranged at the bottom of the connecting column, a linkage mechanism is fixedly arranged on the top of the adjustment mechanism, a pressure relief mechanism is arranged on the side wall of the linkage mechanism, and a compression spring is arranged between the pressure-maintaining mechanism and the injection cylinder.

[0007] Preferably, the adjustment mechanism includes an adjusting motor, four plug-in columns, an adjusting screw, a hollow seat, a lower mold, an upper mold and a disc. The hollow seat is fixedly arranged below the mounting frame, the adjusting motor is fixedly arranged at the bottom of the hollow seat, the adjusting screw is fixedly arranged at the end of the output shaft of the adjusting motor, the four plug-in columns are movably inserted inside the hollow seat, the lower mold is fixedly arranged on the top of the four plug-in columns, the upper mold is fixedly arranged on the bottom of two mounting frames, the disc is fixedly arranged on the top of the adjusting screw, and the disc is matched with the lower mold for rotation limit.

[0008] Preferably, the linkage mechanism includes a telescopic rod, a long plate, an E-shaped rod, a slide groove, a second rack, a first rack, a linkage gear and a connecting shaft. The telescopic rod is fixedly set on the top of the upper mold, the first rack is fixedly set on the top of the telescopic rod, the second rack is fixedly set on the top of the lower mold, the long plate is fixedly set on the top of the upper mold, the connecting shaft is rotatably set on the long plate, the linkage gear is fixedly set on one end of the connecting shaft, the E-shaped rod is fixedly set on the side wall of the second rack, the slide groove is set on the side wall of the long plate, and the E-shaped rod is located in the slide groove and slides within a limited position.

[0009] Preferably, the pressure maintaining mechanism includes a pressure maintaining gear, a first bevel gear, a second bevel gear, a tooth column and a rotating column, the rotating column is rotatably set on the top of the upper mold, the first bevel gear is fixedly set on the end of the connecting shaft, the second bevel gear is fixedly set on the top of the rotating column, the tooth column is fixedly sleeved on the rotating column, the pressure maintaining gear is fixedly set on the top of the pressure maintaining sleeve, and a pressure relief assembly is arranged inside the pressure maintaining gear.

[0010] Preferably, the pressure relief assembly includes a pressure relief plate, a pressure relief shaft, a pressure relief groove and a limit rod, the pressure relief groove is arranged on the pressure maintaining gear and the pressure maintaining sleeve, the pressure relief shaft is rotatably arranged inside the pressure relief groove, the pressure relief plate is fixedly arranged on the pressure relief shaft, and the limit rod is fixedly arranged inside the pressure relief groove.

[0011] Preferably, the pressure relief mechanism includes a U-shaped rod, a pressure relief rod, a wedge block, a mounting ring, an engagement block, two telescopic spring columns, two return springs and an annular limiting groove, the mounting ring is fixedly sleeved on the connecting column, one end of the U-shaped rod is fixedly set on the side wall of the first rack, the pressure relief rod is fixedly set on the other end of the U-shaped rod, the wedge block is fixedly set on the top of the pressure relief rod, the pressure relief rod is provided with a vertical groove, one of the telescopic spring columns is slidably set inside the vertical groove, the other telescopic spring column is fixedly set on the side wall of the pressure relief rod, the two return springs are respectively sleeved on the two telescopic spring columns, the annular limiting groove is set inside the pressure maintaining gear, one of the telescopic spring columns is located in the annular limiting groove and slides, and the engagement block is fixedly set on a side wall of the pressure relief rod away from the telescopic spring column.

[0012] Preferably, the pressure relief rod is a three-section telescopic structure with both upper and lower ends being telescopic, and the U-shaped rod is a telescopic structure.

[0013] Preferably, the reciprocating mechanism includes a trapezoidal column, a connecting rod, a reciprocating screw, a transmission belt, a reciprocating ring and a mounting column. The mounting column is rotatably arranged on the top of the upper mold, the reciprocating screw is fixedly arranged on the top of the mounting column, the transmission belt is sleeved on the reciprocating screw and the connecting column, the reciprocating ring is meshingly arranged on the reciprocating screw, the trapezoidal column is slidably sleeved on the connecting column, the connecting rod is fixedly arranged between the trapezoidal column and the reciprocating ring, and the trapezoidal column is in contact with the wedge block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention realizes that the thicker the grinding pad is, the greater the holding pressure is when casting it. The greater the pressure is, the longer the holding time is required. In addition, since the more and thicker the material is, the greater the instability is, the shorter the holding cycle interval is, so the quality of the grinding pad is guaranteed, and quality problems such as bubbles or non-forming caused by insufficient holding time are avoided.

[0016] (2) The present invention realizes limiting the highest point of the injection molding pressure holding stroke by moving the E-shaped rod through the arrangement of the telescopic rod, the long plate, the E-shaped rod, the slide groove, the second rack, the first rack, the linkage gear and the connecting shaft, so that there is no need to readjust the injection molding pressure holding stroke during the next cycle of pressure holding, and the arrangement of the adjustment mechanism also meets the injection molding requirements of grinding pads of different thicknesses;

[0017] (3) In summary, the device realizes that the holding pressure, holding time and cycle holding interval time in the entire working process can be adaptively adjusted according to the thickness of the grinding pad without manual intervention, with a high degree of automation, simple operation, and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the regulating mechanism of the present invention;

[0020] Figure 3 It is a schematic diagram of the positional relationship between the linkage mechanism and the pressure relief mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the reciprocating mechanism structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the internal cross-sectional structure of the injection barrel of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0024] Figure 7 It is a schematic diagram of the internal cross-sectional structure of part of the structure of the present invention;

[0025] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0026] In the figure: 1. driving motor; 2. L-shaped mounting plate; 3. adjusting mechanism; 31. adjusting motor; 32. plug-in column; 33. adjusting screw; 34. hollow seat; 35. lower mold; 36. upper mold; 37. disc; 4. linkage mechanism; 41. telescopic rod; 42. long plate; 43. E-shaped rod; 44. slide; 45. second rack; 46. first rack; 47. linkage gear; 48. connecting shaft; 5. reciprocating mechanism; 51. trapezoidal column; 52. connecting rod; 53. reciprocating screw rod; 54. transmission belt; 55. reciprocating ring; 56. mounting column; 6. pressure-maintaining mechanism; 61. pressure-maintaining gear ;611, pressure relief plate;612, pressure relief shaft;613, pressure relief groove;614, limiting rod;62, first bevel gear;63, second bevel gear;64, gear column;65, rotating column;7, pressure relief mechanism;71, U-shaped rod;72, pressure relief rod;73, wedge block;74, mounting ring;75, meshing block;76, telescopic spring column;77, reset spring;78, annular limiting groove;8, injection cylinder;81, pressure maintaining sleeve;82, injection screw;9, compression spring;10, raw material cylinder;11, input pipe;12, output pipe;13, support frame;14, mounting frame;15, connecting column. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 8, an embodiment of the present invention: a grinding pad preparation device, comprising two mounting frames 14, an adjustment mechanism 3 is fixedly arranged below the two mounting frames 14, an injection cylinder 8 is fixedly arranged on the top of the adjustment mechanism 3, a pressure-maintaining sleeve 81 is slidably arranged inside the injection cylinder 8, a support frame 13 is fixedly arranged on the top of the two mounting frames 14, a raw material cylinder 10 is fixedly arranged between the two support frames 13, an output tube 12 is fixedly arranged at the bottom of the raw material cylinder 10, the output tube 12 is connected to the injection cylinder 8, an input tube 11 is fixedly arranged on the side wall of the raw material cylinder 10, one of which An L-shaped mounting plate 2 is fixedly provided on the top of the mounting frame 14, a driving motor 1 is fixedly provided on the top of the L-shaped mounting plate 2, a connecting column 15 is fixedly provided on the end of the output shaft of the driving motor 1, an injection screw 82 is fixedly provided on the bottom of the connecting column 15, a reciprocating mechanism 5 is provided on the upper sleeve of the connecting column 15, a pressure-maintaining mechanism 6 for adaptively adjusting the pressure according to the thickness of the grinding pad is provided at the bottom of the connecting column 15, a linkage mechanism 4 is fixedly provided on the top of the adjusting mechanism 3, a pressure relief mechanism 7 is provided on the side wall of the linkage mechanism 4, and a compression spring 9 is provided between the pressure-maintaining mechanism 6 and the injection cylinder 8. First, epoxy resin, aluminum oxide, silicon carbide and corundum mixed in proportion are added into the raw material barrel 10 from the input pipe 11, and then the raw materials are output into the injection barrel 8 through the output pipe 12. Then, the thickness of the grinding pad to be cast is adjusted by the adjusting mechanism 3. The adjusting mechanism 3 adjusts the thickness and drives the linkage mechanism 4 to work at the same time. The linkage mechanism 4 drives the pressure holding mechanism 6 to adjust the injection stroke of the injection barrel 8. Then, the output shaft of the driving motor 1 is driven to rotate to drive the connecting column 15 and the injection screw 82 to rotate. The injection screw 82 rotates to extrude the raw materials into the mold of the adjusting mechanism 3. The rotation of the injection screw 82 drives the pressure holding mechanism 6 to drive the pressure holding sleeve 81 downward to pressurize the internal cavity of the mold. According to the production of thicker grinding pads, the injection stroke is increased synchronously, so as to achieve the effect of adaptively adjusting the injection pressure with the thickness of the required injection grinding pad. The synchronous linkage mechanism 4 will synchronously drive the pressure relief mechanism 7 to move, cooperate with the driving motor 1 to drive the reciprocating mechanism 5 to reciprocate, and adjust the pressure relief time and the cycle pressure holding time interval.

[0029] Specifically, the adjusting mechanism 3 includes an adjusting motor 31, four plug-in columns 32, an adjusting screw 33, a hollow seat 34, a lower mold 35, an upper mold 36 and a disc 37. The hollow seat 34 is fixedly arranged below the mounting frame 14, the adjusting motor 31 is fixedly arranged at the inner bottom of the hollow seat 34, the adjusting screw 33 is fixedly arranged at the end of the output shaft of the adjusting motor 31, the four plug-in columns 32 are movably plugged in the hollow seat 34, the lower mold 35 is fixedly arranged on the top of the four plug-in columns 32, the upper mold 36 is fixedly arranged on the bottom of the two mounting frames 14, the disc 37 is fixedly arranged on the top of the adjusting screw 33, and the disc 37 is rotationally limited with the lower mold 35. The adjusting screw 33 is driven to rotate by the output shaft of the adjusting motor 31, and the adjusting screw 33 is threadedly matched with the hollow seat 34, so that the adjusting screw 33 can move in the vertical direction. The movement of the adjusting screw 33 drives the disc 37 to move, and the movement of the disc 37 drives the lower mold 35 to move synchronously, thereby meeting the injection molding requirements of grinding pads of different thicknesses.

[0030] Specifically, the linkage mechanism 4 includes a telescopic rod 41, a long plate 42, an E-shaped rod 43, a slide groove 44, a second rack 45, a first rack 46, a linkage gear 47 and a connecting shaft 48. The telescopic rod 41 is fixedly set on the top of the upper mold 36, the first rack 46 is fixedly set on the top of the telescopic rod 41, the second rack 45 is fixedly set on the top of the lower mold 35, the long plate 42 is fixedly set on the top of the upper mold 36, the connecting shaft 48 is rotatably set on the long plate 42, the linkage gear 47 is fixedly set on one end of the connecting shaft 48, the E-shaped rod 43 is fixedly set on the side wall of the second rack 45, the slide groove 44 is set on the side wall of the long plate 42, and the E-shaped rod 43 is located in the slide groove 44 and slides within a limited position. The second rack 45 is moved upward by the lower mold 35, and the second rack 45 moves upward to drive the E-type rod 43 to move synchronously. The movement of the second rack 45 drives the linkage gear 47 and the connecting shaft 48 to rotate synchronously, and the rotation of the linkage gear 47 drives the first rack 46 to move downward. The highest point of the injection holding stroke is limited by the movement of the E-type rod 43, so that there is no need to readjust the injection holding stroke during the next cycle of holding pressure.

[0031] Specifically, the pressure maintaining mechanism 6 includes a pressure maintaining gear 61, a first bevel gear 62, a second bevel gear 63, a tooth column 64 and a rotating column 65. The rotating column 65 is rotatably set on the top of the upper mold 36, the first bevel gear 62 is fixedly set on the end of the connecting shaft 48, the second bevel gear 63 is fixedly set on the top of the rotating column 65, the tooth column 64 is fixedly sleeved on the rotating column 65, the pressure maintaining gear 61 is fixedly set on the top of the pressure maintaining sleeve 81, and a pressure relief component is set inside the pressure maintaining gear 61. The first bevel gear 62 is driven to rotate by the connecting shaft 48, and the first bevel gear 62 drives the second bevel gear 63 to rotate, and the second bevel gear 63 drives the rotating column 65 and the tooth column 64 to rotate synchronously. It is worth noting that: when adjusting the stroke, the output shaft of the driving motor 1 and the injection screw 82 are in a stationary state, and the pressure-holding gear 61 is driven to move upward by the rotation of the tooth column 64. The upward movement of the pressure-holding gear 61 increases the pressure-holding injection stroke, thereby increasing the injection pressure; the injection pressure is adaptively adjusted according to the thickness of the required injection molding grinding pad, with a high degree of automation and no need for manual supervision and adjustment.

[0032] Specifically, the pressure relief assembly includes a pressure relief plate 611, a pressure relief shaft 612, a pressure relief groove 613 and a limiting rod 614. The pressure relief groove 613 is arranged on the pressure maintaining gear 61 and the pressure maintaining sleeve 81. The pressure relief shaft 612 is rotatably arranged inside the pressure relief groove 613. The pressure relief plate 611 is fixedly arranged on the pressure relief shaft 612. The limiting rod 614 is fixedly arranged inside the pressure relief groove 613. The internal air is squeezed by moving the pressure-maintaining gear 61 and the pressure-maintaining sleeve 81 downward, thereby driving the pressure relief plate 611 and the pressure relief shaft 612 to rotate around the pressure relief shaft 612, blocking the pressure relief groove 613 to avoid air leakage during injection molding pressure maintenance. When the pressure is released, the pressure-maintaining gear 61 and the pressure-maintaining sleeve 81 move upward, causing the pressure relief plate 611 to rotate under the action of gravity, thereby causing the compressed gas inside the injection cylinder 8 to be discharged from the pressure relief groove 613; the air release and sealing states of the pressure relief groove 613 are adaptively switched during cyclic pressure maintenance without the need for electrical control, which is energy-saving and environmentally friendly.

[0033] Specifically, the pressure relief mechanism 7 includes a U-shaped rod 71, a pressure relief rod 72, a wedge block 73, a mounting ring 74, an engagement block 75, two telescopic spring columns 76, two return springs 77 and an annular limiting groove 78. The mounting ring 74 is fixedly sleeved on the connecting column 15, one end of the U-shaped rod 71 is fixedly arranged on the side wall of the first rack 46, the pressure relief rod 72 is fixedly arranged on the other end of the U-shaped rod 71, the wedge block 73 is fixedly arranged on the top of the pressure relief rod 72, and a vertical groove is arranged on the pressure relief rod 72, one of the telescopic spring columns 76 is slidably arranged in the vertical groove, and the other telescopic spring column 76 is fixedly arranged on the side wall of the pressure relief rod 72, the two return springs 77 are respectively sleeved on the two telescopic spring columns 76, and the annular limiting groove 78 is arranged inside the pressure maintaining gear 61, one of the telescopic spring columns 76 slides in the annular limiting groove 78, and the engagement block 75 is fixedly arranged on a side wall of the pressure relief rod 72 away from the telescopic spring column 76. The first rack 46 moves downward to drive the U-shaped rod 71 to move downward, and the downward movement of the U-shaped rod 71 drives the pressure relief rod 72 to contract. The contraction of the pressure relief rod 72 drives the wedge block 73 to move downward. When the injection screw 82 rotates, it drives the pressure holding gear 61 to move down to the bottom of the injection screw 82, and the injection screw 82 has a smooth section. At this time, under the continuous rotation of the injection screw 82, the pressure holding gear 61 is always in this section, and it is in the pressure holding state until the wedge block 73 is resisted and moves toward the linkage gear 47, driving the meshing block 75 to move synchronously, so that the meshing block 75 retracts into the pressure holding gear 61, so that the pressure holding gear 61 moves upward to the position of resisting the E-shaped block under the action of the compression spring 9. This is the interval time of the next pressure holding cycle, and then until the force that resists the wedge block 73 is removed, the pressure relief rod 72 is reset under the action of the reset spring 77, thereby driving the meshing block 75 to mesh with the screw again, and the next pressure holding cycle begins.

[0034] Specifically, the pressure relief rod 72 is a three-stage telescopic structure with both upper and lower ends being telescopic, and the U-shaped rod 71 is a telescopic structure.

[0035] Specifically, the reciprocating mechanism 5 includes a trapezoidal column 51, a connecting rod 52, a reciprocating screw rod 53, a transmission belt 54, a reciprocating ring 55 and a mounting column 56. The mounting column 56 is rotatably set on the top of the upper mold 36, the reciprocating screw rod 53 is fixedly set on the top of the mounting column 56, the transmission belt 54 is sleeved on the reciprocating screw rod 53 and the connecting column 15, the reciprocating ring 55 is meshingly set on the reciprocating screw rod 53, the trapezoidal column 51 is slidably sleeved on the connecting column 15, the connecting rod 52 is fixedly set between the trapezoidal column 51 and the reciprocating ring 55, and the trapezoidal column 51 is in contact with the wedge block 73. The connecting column 15 rotates to drive the transmission belt 54 to drive the reciprocating screw 53 to rotate, and the reciprocating screw 53 rotates to drive the reciprocating ring 55 to move up and down, and the reciprocating ring 55 moves up and down to drive the connecting rod 52 and the trapezoidal column 51 to move up and down. Since the injection molding pressure holding stroke is longer, the corresponding pressure relief rod 72 shrinks more, so that the trapezoidal column 51 moves to a distance to the wedge block 73. The longer the holding time, the longer the upper end of the corresponding pressure relief rod 72 shrinks, so that the time from the trapezoidal column 51 to the trapezoidal column 51 is separated from the wedge block 73 is shorter, so that the cycle holding time interval is shorter; the thicker the grinding pad is, the greater the holding pressure is when pouring, and the greater the corresponding pressure is, the longer the holding time is required. Moreover, since the more and thicker the material is, the stronger the internal instability is, the shorter the holding cycle interval is. The holding pressure, holding time and cycle holding interval time in the entire working process can be adaptively adjusted without manual intervention, with a high degree of automation, simple operation, and convenience.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grinding pad preparation device, comprising two mounting frames (14), characterized in that: An adjusting mechanism (3) is fixedly arranged below the two mounting frames (14); an injection cylinder (8) is fixedly arranged on the top of the adjusting mechanism (3); a pressure-maintaining sleeve (81) is slidably arranged inside the injection cylinder (8); a supporting frame (13) is fixedly arranged on the top of the two mounting frames (14); a raw material cylinder (10) is fixedly arranged between the two supporting frames (13); an output pipe (12) is fixedly arranged at the bottom of the raw material cylinder (10); the output pipe (12) is connected to the injection cylinder (8); an input pipe (11) is fixedly arranged on the side wall of the raw material cylinder (10); an L-shaped mounting frame (14) is fixedly arranged on the top of one of the mounting frames (14); A mounting plate (2), a driving motor (1) is fixedly arranged on the top of the L-shaped mounting plate (2), a connecting column (15) is fixedly arranged on the end of the output shaft of the driving motor (1), an injection screw (82) is fixedly arranged on the bottom of the connecting column (15), a reciprocating mechanism (5) is sleeved on the connecting column (15), a pressure-maintaining mechanism (6) for adaptively adjusting the pressure according to the thickness of the grinding pad is arranged at the bottom of the connecting column (15), a linkage mechanism (4) is fixedly arranged on the top of the adjusting mechanism (3), a pressure relief mechanism (7) is arranged on the side wall of the linkage mechanism (4), and a compression spring (9) is arranged between the pressure-maintaining mechanism (6) and the injection cylinder (8).

2. The polishing pad preparation device according to claim 1, characterized in that: The adjusting mechanism (3) comprises an adjusting motor (31), four plug-in columns (32), an adjusting screw (33), a hollow seat (34), a lower mold (35), an upper mold (36) and a disc (37); the hollow seat (34) is fixedly arranged below the mounting frame (14); the adjusting motor (31) is fixedly arranged at the inner bottom of the hollow seat (34); the adjusting screw (33) is fixedly arranged at the end of the output shaft of the adjusting motor (31); the four plug-in columns (32) are movably plugged in the hollow seat (34); the lower mold (35) is fixedly arranged at the top of the four plug-in columns (32); the upper mold (36) is fixedly arranged at the bottom of the two mounting frames (14); the disc (37) is fixedly arranged at the top of the adjusting screw (33); and the disc (37) is rotationally limitedly matched with the lower mold (35).

3. The polishing pad preparation device according to claim 2, characterized in that: The linkage mechanism (4) comprises a telescopic rod (41), a long plate (42), an E-shaped rod (43), a slide groove (44), a second rack (45), a first rack (46), a linkage gear (47) and a connecting shaft (48); the telescopic rod (41) is fixedly arranged on the top of the upper mold (36); the first rack (46) is fixedly arranged on the top of the telescopic rod (41); the second rack (45) is fixedly arranged on the top of the lower mold (35); the long plate (42) is fixedly arranged on the top of the upper mold (36); the connecting shaft (48) is rotatably arranged on the long plate (42); the linkage gear (47) is fixedly arranged on one end of the connecting shaft (48); the E-shaped rod (43) is fixedly arranged on the side wall of the second rack (45); the slide groove (44) is arranged on the side wall of the long plate (42); and the E-shaped rod (43) is located in the slide groove (44) and slides within a limited position.

4. The polishing pad preparation device according to claim 3, characterized in that: The pressure-maintaining mechanism (6) comprises a pressure-maintaining gear (61), a first bevel gear (62), a second bevel gear (63), a tooth column (64) and a rotating column (65); the rotating column (65) is rotatably arranged on the top of the upper mold (36); the first bevel gear (62) is fixedly arranged at the end of the connecting shaft (48); the second bevel gear (63) is fixedly arranged on the top of the rotating column (65); the tooth column (64) is fixedly sleeved on the rotating column (65); the pressure-maintaining gear (61) is fixedly arranged on the top of the pressure-maintaining sleeve (81); and a pressure relief component is arranged inside the pressure-maintaining gear (61).

5. The polishing pad preparation device according to claim 4, characterized in that: The pressure relief assembly comprises a pressure relief plate (611), a pressure relief shaft (612), a pressure relief groove (613) and a limiting rod (614); the pressure relief groove (613) is arranged on the pressure maintaining gear (61) and the pressure maintaining sleeve (81); the pressure relief shaft (612) is rotatably arranged inside the pressure relief groove (613); the pressure relief plate (611) is fixedly arranged on the pressure relief shaft (612); and the limiting rod (614) is fixedly arranged inside the pressure relief groove (613).

6. The polishing pad preparation device according to claim 3, characterized in that: The pressure relief mechanism (7) comprises a U-shaped rod (71), a pressure relief rod (72), a wedge block (73), a mounting ring (74), an engagement block (75), two telescopic spring columns (76), two return springs (77) and an annular limiting groove (78); the mounting ring (74) is fixedly sleeved on the connecting column (15); one end of the U-shaped rod (71) is fixedly arranged on the side wall of the first rack (46); the pressure relief rod (72) is fixedly arranged on the other end of the U-shaped rod (71); the wedge block (73) is fixedly arranged on the top of the pressure relief rod (72); A vertical groove is provided on the rod (72), one of the telescopic spring columns (76) is slidably arranged inside the vertical groove, the other telescopic spring column (76) is fixedly arranged on the side wall of the pressure relief rod (72), the two reset springs (77) are respectively sleeved on the two telescopic spring columns (76), the annular limiting groove (78) is arranged inside the pressure maintaining gear (61), one of the telescopic spring columns (76) is located in the annular limiting groove (78) and slides, and the engaging block (75) is fixedly arranged on a side wall of the pressure relief rod (72) away from the telescopic spring column (76).

7. The polishing pad preparation device according to claim 6, characterized in that: The pressure relief rod (72) is a three-stage telescopic structure with both upper and lower ends being telescopic, and the U-shaped rod (71) is a telescopic structure.

8. The polishing pad preparation device according to claim 6, characterized in that: The reciprocating mechanism (5) comprises a trapezoidal column (51), a connecting rod (52), a reciprocating screw rod (53), a transmission belt (54), a reciprocating ring (55) and a mounting column (56); the mounting column (56) is rotatably arranged on the top of the upper mold (36); the reciprocating screw rod (53) is fixedly arranged on the top of the mounting column (56); the transmission belt (54) is sleeved on the reciprocating screw rod (53) and the connecting column (15); the reciprocating ring (55) is meshedly arranged on the reciprocating screw rod (53); the trapezoidal column (51) is slidably sleeved on the connecting column (15); the connecting rod (52) is fixedly arranged between the trapezoidal column (51) and the reciprocating ring (55); and the trapezoidal column (51) is in contact with the wedge block (73).

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