Surface polishing device for mechanical mold production

Abstract

The invention relates to a surface polishing device for mechanical mold production, which comprises a bottom plate, a first motor and a polishing wheel arranged at the output end of the first motor, one side of the bottom plate is provided with a fixing device for fixing a mold, the other side of the bottom plate is provided with a second motor, and the output end of the second motor is provided with a turntable. A moving block is radially and slidably connected to the surface of the turntable, a driving device for driving the moving block to reciprocate in the radial direction is arranged on the surface of the turntable, a connecting rod is rotatably connected to the moving block, a supporting rod is arranged at the end of the connecting rod, and the first motor is arranged at the lower end of the supporting rod; in the polishing process, the polishing wheel does circular motion with the gradually-changed radius of the motion trail at the same time, so that the polishing time of different positions of the surface of the circular mold cavity is the same, the polishing uniformity of the surface of the whole cavity is improved, and the attractiveness of a workpiece is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mold polishing, in particular to a surface polishing device for mechanical mold production. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. It is known as the "mother of industry".

[0003] Polishing is a very important process in the mold making process, and it is also the finishing touch. With the widespread application of plastic products, the requirements for the appearance quality of plastic products are getting higher and higher, so the surface polishing quality of the plastic mold cavity must also be improved accordingly, especially for molds with mirror and high-gloss surfaces, which have higher requirements for mold surface roughness, and thus higher requirements for polishing. Polishing not only increases the beauty of the workpiece, but also improves the corrosion resistance and wear resistance of the material surface, and can also facilitate subsequent injection molding processing, such as making plastic products easier to demold and reducing the production injection molding cycle.

[0004] For a circular mold, when polishing its cavity, it is difficult to control the residence time of the polishing wheel at various positions on the cavity surface, resulting in different polishing times at different positions, which in turn affects the polishing uniformity of the entire cavity surface and easily causes the workpiece to have poor aesthetics. Summary of the invention

[0005] An embodiment of the present invention provides a surface polishing device for mechanical mold production. During the polishing process, the polishing wheel simultaneously performs a circular motion with a gradually changing radius of the motion trajectory, so that different positions on the surface of the circular mold cavity are polished for the same time, thereby improving the polishing uniformity of the entire cavity surface. This can solve the problem in the prior art that the polishing time for different positions on the surface of the circular mold cavity is difficult to control, thereby affecting the polishing uniformity of the entire cavity surface and easily causing the workpiece to have poor aesthetics.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a surface polishing device for mechanical mold production, comprising a base plate, a first motor and a polishing wheel arranged at the output end of the first motor, a fixing device for fixing the mold is arranged on one side of the base plate, a second motor is arranged on the other side of the base plate, a turntable is arranged at the output end of the second motor, a moving block is radially slidably connected to the surface of the turntable, a driving device for driving the moving block to reciprocate along its radial direction is arranged on the surface of the turntable, a connecting rod is rotatably connected to the moving block, a support rod is arranged at the end of the connecting rod, and the first motor is arranged at the lower end of the support rod;

[0007] A gantry is arranged on the bottom plate and is located between the fixing device and the turntable. A longitudinal guide rod is arranged between the inner front wall and the inner rear wall of the gantry. A longitudinal sliding sleeve is slidably connected to the longitudinal guide rod. A transverse guide sleeve is arranged on the longitudinal sliding sleeve. The connecting rod is slidably connected to the transverse guide sleeve.

[0008] Preferably, the driving device includes a rectangular guide groove, a ball screw, a first ball nut and a third motor, the rectangular guide groove is radially arranged on the surface of the turntable, the moving block is slidably connected to the surface of the turntable through the rectangular guide groove, the inside of the rectangular guide groove is rotatably connected to the ball screw, the ball screw is threadedly connected to the first ball nut which is integral with the moving block, the third motor is arranged at one end in the length direction of the rectangular guide groove, and its output end is fixedly connected to the ball screw.

[0009] Preferably, an avoidance groove is provided on the bottom plate, and the fixing device includes two side plates relatively arranged on the lower surface of the bottom plate, a fourth motor, forward and reverse screw rods, a guide rod, two second ball nuts and two clamping plates, the fourth motor is arranged on one of the side plates, the forward and reverse screw rods are arranged at the output end of the fourth motor and are rotatably connected between the two side plates, the guide rod is arranged between the two side plates, the forward and reverse screw rods are rotatably connected to two relatively arranged second ball nuts, the upper ends of the two second ball nuts pass through the avoidance groove and are relatively arranged with two clamping plates, and the two second ball nuts are slidably connected to the guide rod.

[0010] Preferably, the clamping surface of the clamping plate is a "V"-shaped structure.

[0011] Preferably, the support rod is a cylinder or an electric push rod.

[0012] Preferably, a transmission box is provided at the lower end of the support rod, a fan and a dust collecting box located below the fan are provided on the transmission box, a dust suction pipe is provided on the fan, the dust suction pipe is fixedly connected with a dust collecting hood pointing to the polishing wheel, a dust guide pipe connected with the dust collecting box is provided on the horizontal section of the dust suction pipe, and a filter is provided at the connection between the dust suction pipe and the dust guide pipe.

[0013] Preferably, the first motor is a dual-axis motor, and the fan includes a driving bevel gear, a driven bevel gear, fan blades and a sealing cover, the driving bevel gear is arranged at the output end of the first motor, the driving bevel gear and the driven bevel gear are meshed with each other, the sealing cover is arranged at the outer upper end of the transmission case, the sealing cover is internally rotatably connected with fan blades coaxially arranged with the driven bevel gear, and the dust suction pipe is connected to the sealing cover.

[0014] Preferably, an air guide port is provided between the transmission box and the dust collecting hood, and an air exhaust port is provided on a side of the lower end of the transmission box opposite to the air guide port.

[0015] Compared with the prior art, the present invention comprises a base plate, a first motor, a polishing wheel, a fixing device, a second motor, a turntable, a moving block, a driving device, a connecting rod, a support rod, a gantry, a longitudinal guide rod, a longitudinal sliding sleeve and a transverse guide sleeve. The circular mold is fixed by the fixing device, the first motor drives the polishing wheel to rotate, and the second motor drives the turntable to rotate. Under the guidance of the longitudinal guide rod and the transverse guide sleeve, the connecting rod drives the polishing wheel to perform circular motion. At the same time, the driving device drives the moving block to move back and forth between the center of the turntable and the edge of the turntable. The radius of the circular motion trajectory of the polishing wheel changes continuously, so that different positions on the surface of the circular mold cavity are polished for the same time, thereby improving the polishing uniformity of the entire cavity surface and improving the aesthetics of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the top view of the turntable of the present invention;

[0018] Figure 3 This is a schematic diagram of the top view of the bottom plate of the present invention;

[0019] Figure 4 It is a schematic diagram of the top view structure of the clamping plate of the present invention;

[0020] Figure 5 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 6 It is a schematic diagram of the main structure of the present invention.

[0022] In the figure: 1. bottom plate; 2. first motor; 3. polishing wheel; 4. second motor; 5. turntable; 6. moving block; 7. connecting rod; 8. support rod; 9. longitudinal guide rod; 10. longitudinal sliding sleeve; 11. transverse guide sleeve; 12. rectangular guide groove; 13. ball screw; 14. third motor; 15. gantry; 16. side plate; 17. fourth motor; 18. forward and reverse screw rods; 19. guide rod; 20. clamping plate; 21. avoidance groove; 22. transmission box; 23. dust box; 24. dust suction pipe; 25. dust collection cover; 26. dust guide pipe; 27. filter; 28. driving bevel gear; 29. ​​driven bevel gear; 30. fan blade; 31. sealing cover; 32. air guide port; 33. exhaust port. DETAILED DESCRIPTION

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figure 1 to Figure 6 As shown, a surface polishing device for mechanical mold production includes a base plate 1, a first motor 2 and a polishing wheel 3 arranged at the output end of the first motor 2, a fixing device for fixing the mold is arranged on one side of the base plate 1, a second motor 4 is arranged on the other side of the base plate 1, a turntable 5 is arranged at the output end of the second motor 4, a moving block 6 is radially slidably connected to the surface of the turntable 5, a driving device for driving the moving block 6 to reciprocate along its radial direction is arranged on the surface of the turntable 5, a connecting rod 7 is rotatably connected to the moving block 6, a supporting rod 8 is arranged at the end of the connecting rod 7, and the first motor 2 is arranged at the lower end of the supporting rod 8;

[0025] A gantry 15 is provided on the base plate 1 and is located between the fixing device and the turntable 5. A longitudinal guide rod 9 is provided between the inner front wall and the inner rear wall of the gantry 15. A longitudinal sliding sleeve 10 is slidably connected to the longitudinal guide rod 9. A transverse guide sleeve 11 is provided on the longitudinal sliding sleeve 10. The connecting rod 7 is slidably connected to the transverse guide sleeve 11.

[0026] During specific use, the circular mold is fixed by a fixing device, the first motor 2 drives the polishing wheel 3 to rotate, and the second motor 4 drives the turntable 5 to rotate. Under the guidance of the longitudinal guide rod 9 and the transverse guide sleeve 11, the connecting rod 7 drives the polishing wheel 3 to make a circular motion. At the same time, the driving device drives the moving block 6 to move back and forth between the center of the turntable 5 and the edge of the turntable 5. The radius of the circular motion trajectory of the polishing wheel 3 changes continuously, so that different positions on the surface of the circular mold cavity are polished for the same time, thereby improving the polishing uniformity of the entire cavity surface.

[0027] In order to achieve the purpose of uniformly polishing the cavity surface of the circular mold, preferably, the driving device includes a rectangular guide groove 12, a ball screw 13, a first ball nut and a third motor 14. The rectangular guide groove 12 is radially arranged on the surface of the turntable 5, and the moving block 6 is slidably connected to the surface of the turntable 5 through the rectangular guide groove 12. The inner rotation of the rectangular guide groove 12 is connected to the ball screw 13, and the ball screw 13 is threadedly connected to the first ball nut which is integrated with the moving block 6. The third motor 14 is arranged at one end in the length direction of the rectangular guide groove 12, and its output end is fixedly connected to the ball screw 13.

[0028] When in use, the circular mold is fixed by a fixing device, the first motor 2 drives the polishing wheel 3 to rotate, the second motor 4 drives the turntable 5 to rotate, and under the guiding action of the longitudinal guide rod 9 and the transverse guide sleeve 11, the connecting rod 7 drives the polishing wheel 3 to make a circular motion. At the same time, the third motor 14 rotates forward and reversely. Under the guiding action of the rectangular guide groove 12, the first ball nut drives the moving block 6 to reciprocate along the length direction of the rectangular guide groove 12, so that the moving block 6 reciprocates between the center of the turntable 5 and the edge of the turntable 5. The radius of the circular motion trajectory of the polishing wheel 3 changes continuously, so that different positions on the surface of the circular mold cavity are polished for the same time, thereby improving the polishing uniformity of the entire cavity surface.

[0029] In order to achieve the purpose of uniformly polishing the cavity surface of the circular mold, preferably, an avoidance groove 21 is opened on the base plate 1, and the fixing device includes two side plates 16 relatively arranged on the lower surface of the base plate 1, a fourth motor 17, forward and reverse screws 18, a guide rod 19, two second ball nuts and two clamping plates 20, the fourth motor 17 is arranged on one of the side plates 16, the forward and reverse screws 18 are arranged at the output end of the fourth motor 17 and are rotatably connected between the two side plates 16, the guide rod 19 is arranged between the two side plates 16, and the forward and reverse screws 18 are rotatably connected to two relatively arranged second ball nuts, the upper ends of the two second ball nuts pass through the avoidance groove 21 and are relatively arranged with two clamping plates 20, and the two second ball nuts are slidably connected to the guide rod 19.

[0030] When fixing the circular mold before polishing, the circular mold is placed between the two clamping plates 20, and the fourth motor 17 is started. The fourth motor 17 drives the forward and reverse screws 18 to rotate, and under the guiding action of the guide rod 19 on the two second ball nuts, the two second ball nuts drive the two clamping plates 20 to move toward each other to center and fix the circular mold, so that the axis position of the circular mold is colinear with the axis of the polishing wheel 3 at the initial position, to ensure that the cavity surface of the circular mold is evenly polished.

[0031] In order to achieve the purpose of uniformly polishing the cavity surface of circular molds of different diameters, preferably, the clamping surface of the clamping plate 20 is a "V"-shaped structure, and the "V"-shaped clamping plate 20 is suitable for clamping and fixing circular molds of different diameters.

[0032] In order to achieve the purpose of polishing the cavity surface of a circular mold with a bottom surface of different thicknesses, preferably, the support rod 8 is a cylinder or an electric push rod, and the support rod 8 can adjust the extension and contraction amount according to the bottom surface thickness of the cavity of the circular mold, thereby polishing the cavity surface of the circular mold with a bottom surface of different thicknesses.

[0033] In order to evenly polish the cavity surface of the circular mold, preferably, a transmission box 22 is provided at the lower end of the support rod 8, a fan and a dust box 23 located below the fan are provided on the transmission box 22, a dust suction pipe 24 is provided on the fan, the dust suction pipe 24 is fixedly connected with a dust collecting hood 25 pointing to the polishing wheel 3, a dust guide pipe 26 connected with the dust box 23 is provided on the horizontal section of the dust suction pipe 24, and a filter net 27 is provided at the connection between the dust suction pipe 24 and the dust guide pipe 26.

[0034] The first motor 2 is a double-axis motor, and the fan includes a driving bevel gear 28, a driven bevel gear 29, a fan blade 30 and a sealing cover 31. The driving bevel gear 28 is arranged at the output end of the first motor 2, and the driving bevel gear 28 and the driven bevel gear 29 are meshed with each other. The sealing cover 31 is arranged at the upper end of the outside of the transmission box 22. The inside of the sealing cover 31 is rotatably connected with the fan blade 30 coaxially arranged with the driven bevel gear 29, and the dust suction pipe 24 is connected to the sealing cover 31.

[0035] An air guide port 32 is disposed between the transmission box 22 and the dust collecting cover 25 , and an air exhaust port 33 is disposed at a side of the lower end of the transmission box 22 opposite to the air guide port 32 .

[0036] During the polishing process, the first motor 2 drives the active bevel gear 28 to rotate, and the active bevel gear 28 drives the fan blades 30 to rotate through the driven bevel gear 29, forming a negative pressure at the dust hood 25. The dust generated during the polishing process is promptly sucked into the dust suction pipe 24 from the dust hood 25, and the dust is blocked by the filter 27. The blocked dust falls into the dust box 23 through the dust guide pipe 26, and the clean air enters the transmission box 22 from the air guide port 32, cools the first motor 2, and is then discharged from the exhaust port 33, so as to prevent dust particles from adhering to the surface of the mold cavity and causing erosion of the cavity during the polishing process, thereby improving the polishing uniformity.

[0037] Compared with the prior art, the present invention comprises a base plate 1, a first motor 2, a polishing wheel 3, a fixing device, a second motor 4, a turntable 5, a moving block 6, a driving device, a connecting rod 7, a support rod 8, a gantry 15, a longitudinal guide rod 9, a longitudinal sliding sleeve 10 and a transverse guide sleeve 11. The circular mold is fixed by the fixing device, the first motor 2 drives the polishing wheel 3 to rotate, the second motor 4 drives the turntable 5 to rotate, and under the guidance of the longitudinal guide rod 9 and the transverse guide sleeve 11, the connecting rod 7 drives the polishing wheel 3 to perform circular motion. At the same time, the driving device drives the moving block 6 to reciprocate between the center of the turntable 5 and the edge of the turntable 5. The radius of the circular motion trajectory of the polishing wheel 3 changes continuously, so that different positions on the surface of the circular mold cavity are polished for the same time, thereby improving the polishing uniformity of the entire cavity surface and improving the aesthetics of the workpiece.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A surface polishing device for mechanical mold production, comprising a base plate (1), a first motor (2) and a polishing wheel (3) arranged at the output end of the first motor (2), characterized in that: A fixing device for fixing the mold is arranged on one side of the base plate (1), and a second motor (4) is arranged on the other side of the base plate (1); a turntable (5) is arranged at the output end of the second motor (4); a moving block (6) is radially slidably connected to the surface of the turntable (5); a driving device for driving the moving block (6) to reciprocate along its radial direction is arranged on the surface of the turntable (5); a connecting rod (7) is rotatably connected to the moving block (6); a support rod (8) is arranged at the end of the connecting rod (7); and the first motor (2) is arranged at the lower end of the support rod (8); The bottom plate (1) is provided with a gantry (15) located between the fixing device and the turntable (5); a longitudinal guide rod (9) is provided between the inner front wall and the inner rear wall of the gantry (15); a longitudinal sliding sleeve (10) is slidably connected to the longitudinal guide rod (9); a transverse guide sleeve (11) is provided on the longitudinal sliding sleeve (10); and the connecting rod (7) is slidably connected to the transverse guide sleeve (11).

2. The surface polishing device for mechanical mold production according to claim 1, characterized in that: The driving device comprises a rectangular guide groove (12), a ball screw (13), a first ball nut and a third motor (14); the rectangular guide groove (12) is radially arranged on the surface of the turntable (5); the moving block (6) is slidably connected to the surface of the turntable (5) through the rectangular guide groove (12); the inside of the rectangular guide groove (12) is rotatably connected with the ball screw (13); the ball screw (13) is threadedly connected with the first ball nut which is integral with the moving block (6); the third motor (14) is arranged at one end in the length direction of the rectangular guide groove (12), and its output end is fixedly connected to the ball screw (13).

3. The surface polishing device for mechanical mold production according to claim 1 or 2, characterized in that: The bottom plate (1) is provided with an avoidance groove (21), and the fixing device comprises two side plates (16) arranged oppositely on the lower surface of the bottom plate (1), a fourth motor (17), a forward and reverse screw rod (18), a guide rod (19), two second ball nuts and two clamping plates (20), wherein the fourth motor (17) is arranged on one of the side plates (16), the forward and reverse screw rod (18) is arranged at the output end of the fourth motor (17) and is rotatably connected between the two side plates (16), the guide rod (19) is arranged between the two side plates (16), the forward and reverse screw rod (18) is rotatably connected to two second ball nuts arranged oppositely, the upper ends of the two second ball nuts pass through the avoidance groove (21) and are arranged oppositely with two clamping plates (20), and the two second ball nuts are slidably connected to the guide rod (19).

4. The surface polishing device for mechanical mold production according to claim 3 is characterized in that: The clamping surface of the clamping plate (20) is a "V"-shaped structure.

5. The surface polishing device for mechanical mold production according to claim 4, characterized in that: The support rod (8) is a cylinder or an electric push rod.

6. The surface polishing device for mechanical mold production according to claim 5, characterized in that: A transmission box (22) is arranged at the lower end of the support rod (8), a fan and a dust collecting box (23) located below the fan are arranged on the transmission box (22), a dust suction pipe (24) is arranged on the fan, the dust suction pipe (24) is fixedly connected with a dust collecting cover (25) pointing to the polishing wheel (3), a dust guide pipe (26) connected with the dust collecting box (23) is arranged on the horizontal section of the dust suction pipe (24), and a filter screen (27) is arranged at the connection between the dust suction pipe (24) and the dust guide pipe (26).

7. The surface polishing device for mechanical mold production according to claim 6, characterized in that: The first motor (2) is a double-shaft motor, and the fan comprises a driving bevel gear (28), a driven bevel gear (29), a fan blade (30) and a sealing cover (31), wherein the driving bevel gear (28) is arranged at the output end of the first motor (2), the driving bevel gear (28) and the driven bevel gear (29) are meshed with each other, the sealing cover (31) is arranged at the outer upper end of the transmission box (22), the inside of the sealing cover (31) is rotatably connected with the fan blade (30) coaxially arranged with the driven bevel gear (29), and the dust suction pipe (24) is connected to the sealing cover (31).

8. The surface polishing device for mechanical mold production according to claim 7, characterized in that: An air guide port (32) is provided between the transmission box (22) and the dust collecting cover (25), and an air exhaust port (33) is provided at a side of the lower end of the transmission box (22) opposite to the air guide port (32).

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