A polishing machine for capsule molds and a polishing method thereof

Abstract

The present application relates to a kind of polishing machine for capsule mould and polishing method thereof.The polishing machine includes main body, polishing mechanism and auxiliary mechanism, polishing mechanism is installed in the inside of main body, it includes fixedly connected in the inside of main body lifting rod and installs vibration assembly in the top of lifting rod, driving assembly and lifting assembly are provided on the main body.The advantages of the present application: high-frequency excitation force is generated by vibration motor to drive three-dimensional composite vibration of vibration tank, and spiral tumbling motion is formed to polishing medium, and the surface of mould needle is polished and repaired on line.Auxiliary mechanism is linked by swing assembly, connecting assembly and movable assembly, and continuously disturbs polishing medium and weakens liquid surface fluctuation, to prevent medium splashing.The present application can complete polishing repair without disassembling mould from production line, greatly shorten repair time, improve production efficiency, while guaranteeing polishing uniformity and mould needle surface integrity.

Description

Technical Field

[0001] This invention relates to a polishing machine and polishing method for capsule molds, belonging to the field of mold polishing technology. Background Technology

[0002] Capsule molds (also known in the industry as mold pin plates, glue-dipping molds, or capsule forming molds) are high-precision forming fixtures in automated pharmaceutical capsule production lines. They are specifically designed to manufacture gelatin / plant-based hollow capsule shells and are the core precision components of the entire capsule machine. During the automated capsule production process, the capsule mold (mold pin) needs to be repeatedly immersed in glue solution for dipping and undergoes frequent demolding operations by the demolding device in the demolding process.

[0003] After prolonged use, capsule molds develop fine scratches and wear on their surface due to the constant pulling action of the demolding device, gradually reducing their surface smoothness. This decrease in surface smoothness directly affects the smoothness of the capsule shell's inner wall and the ease of demolding, thus negatively impacting the quality of the formed capsules. Therefore, capsule molds require surface polishing and repair after a period of use to restore their surface smoothness.

[0004] Currently, traditional methods for surface polishing and repairing capsule molds are all offline. The specific procedure involves disassembling the mold (mold pin plate) entirely from the automated capsule production line, clamping it in specialized tooling, and then transporting it to a separate polishing machine for polishing and repair. After repair, the mold is reinstalled back onto the production line. This entire offline repair process typically takes several days, during which the production line needs to be shut down or rely on spare molds for rotation. This is not only time-consuming and labor-intensive but also severely impacts production efficiency and equipment utilization.

[0005] In the field of polishing equipment, some vibratory polishing devices already exist in the prior art. For example, Chinese utility model patent CN223700447U discloses a vertical vibratory polisher for removing oxide scale from stainless steel bolts. It includes a base plate, support column, spring hanger, vibratory groove, and lifting mechanism. The lifting mechanism drives the vibratory groove to reciprocate, working in conjunction with steel shot to vibrate and rub the bolt surface to remove oxide scale. However, this type of vibratory polishing equipment is mainly designed for batch offline polishing of small metal parts such as bolts. Its vibratory groove needs to be moved to a specific workstation, and the workpieces require manual loading and unloading. It cannot be directly integrated into automated capsule production lines, nor can it achieve online in-situ polishing and repair of capsule molds on the production line without disassembling the molds. Furthermore, this type of equipment does not include any optimized design for the polishing uniformity and surface integrity protection of the slender mold needle structure of capsule molds.

[0006] To date, no existing technology has been found that can directly perform online polishing and repair of capsule molds on the production line. Therefore, there is an urgent need for a device and method that can utilize existing workstations on the production line to complete online high-frequency vibration polishing and repair without removing the mold from the production line, in order to solve the problems of high labor intensity, long time consumption, and low efficiency of offline repair. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a polishing machine and polishing method for capsule molds. The technical solution of the present invention is as follows: A polishing machine for capsule molds includes a main body (100) and a polishing mechanism (200). The polishing mechanism (200) is installed inside the main body (100) and is used to polish the mold. The polishing mechanism (2) includes lifting rods (201) and vibration components (21) fixedly connected inside the main body (100). The four lifting rods (201) are arranged in pairs and symmetrically distributed with the middle of the main body (100) as the center. The vibration components (21) are installed on the top of the two sets of lifting rods (201) and are used to polish the mold by high-frequency vibration. The vibration components (21) include a base plate (1) fixedly connected to the output end of the two sets of lifting rods (201). Several springs (2) are fixedly connected to the top of the base plate (1). Vibration grooves (4) are fixedly connected to the top of the several springs. Vibration motors are fixedly connected to the left and right sides of the vibration grooves (4). An eccentric block with adjustable amplitude is installed on the shaft of the vibration motor. A water inlet pipe connector (8) is fixedly installed on the front of the vibration groove (4), a left water pipe connector (3) is fixedly installed on the left outer wall of the vibration groove (4), and a right water pipe connector (5) is fixedly connected to the right outer wall; a water outlet pipe connector (9) is fixedly connected to the right side of the vibration groove (4), and a sandwich layer is provided inside the vibration groove (4), and both the water inlet pipe connector (8) and the water outlet pipe connector (9) are connected to the sandwich layer inside the vibration groove (4); The auxiliary mechanism (3) is installed inside the vibration groove (4) to prevent the polishing medium from splashing during the polishing process; the auxiliary mechanism (3) includes several fixed frames (301) installed on the bottom inner wall of the vibration groove (4).

[0008] The main body (100) includes: A drive assembly (110) is mounted on the top of the main body (100) and is used to drive the mold for conveying. The drive assembly (110) includes a fixed frame (111) fixedly connected to the top of the main body (100), and gearboxes (112) are fixedly mounted on the left and right inner walls of the fixed frame (111). The gearbox (112) has two meshing push rods (113) inside. The bottom of the push rod (113) is rotatably connected to a one-way push bar (114). The one-way push bar (114) is a pawl-type push plate hinged to the bottom surface of the push rod (113). When the one-way push bar (114) slides in the forward direction, it pushes against the mold end plate. When it slides in the reverse direction, it flips over around the hinge point to avoid it. The lifting assembly (120) is installed on the side wall of the main body (100) and is used to drive the mold to slide up and down. The lifting assembly (12) includes a mounting plate (121) fixedly installed on the front and back of the fixed frame (111), and a support frame (122) is slidably connected to the side of the mounting plate (121) away from the fixed frame (111). A lifting motor (123) is fixedly connected to the side of the mounting plate (121) near the support frame (122). The output end of the lifting motor (123) is rotatably connected to the top of the support frame (122) to drive the support frame (122) to lift.

[0009] The auxiliary mechanism (300) also includes a swing assembly (310), which is installed inside the fixed frame (301) and is used to agitate the polishing medium. The swing assembly (31) includes a first central rod (311) rotatably connected inside the fixed frame (301), and a plurality of vertical rods (312) are fixedly connected to the outer surface of the first central rod (311), and a counterweight ball is fixedly connected to the bottom of the vertical rods (312). A connecting component (32) is mounted on top of the swing component (31) and is used to slide up and down following the swing of the swing component (31); The connecting assembly (32) includes a first sliding plate (321) slidably connected inside the fixed frame (301), two second central rods (322) are rotatably connected to the bottom of the first sliding plate (321), and a connecting rod (323) is rotatably connected to the bottom of the second central rods (322), and the connecting rod (323) is fixedly connected to the outer surface of two of the vertical rods (312). The movable component (33) is installed on the top of the connecting component (32) to prevent collision with the mold; the movable component (33) includes two first elastic plates (331) fixedly connected to the top of the first sliding plate (321), and a plurality of water outlet holes are provided on the side wall of the first elastic plate (331); a second elastic plate (332) is fixedly installed on the side of the first elastic plate (331) away from the first sliding plate (321), and the first sliding plate (333) is fixedly connected between the two second elastic plates (332).

[0010] Hot water circulates in the interlayer of the outer wall of the vibration groove (4). The temperature of the hot water is kept constant by the hot water tank (10) and the control box. An electric heater and a temperature sensor are installed in the hot water tank (10). The inlet pipe connector (8) is connected to the outlet (12) of the water pump (13), and the outlet pipe connector (9) is connected to the inlet (11) of the hot water tank (10).

[0011] The vibration motor (6) generates a high-frequency periodic excitation force with a frequency of 10-50Hz and an amplitude controlled at 2-10mm. It drives the vibration groove (4) to perform three-dimensional composite vibration on the top of the spring (2), causing the polishing medium inside the vibration groove (4) to form a spiral rolling motion within the vibration groove (4). This motion includes three composite motion forms: up and down vibration, inward and outward flipping, and spiral rotation. It also generates continuous and uniform relative friction and impact with the die needle surface, thereby removing defects on the die needle surface and obtaining a smooth finish.

[0012] The main body (100) is also provided with a glue-dip tank installation position. When polishing is required, the glue-dip tank is removed from its original position, and the vibration tank (4) is raised to the original position of the glue-dip tank by the lifting rod (201).

[0013] When the vibration groove (4) vibrates, the polishing medium flows in the groove and impacts the counterweight ball (313), causing the counterweight ball (313) to drive the vertical rod (312) and the first central rod (311) to swing synchronously. The first central rod (311) drives the connecting rod (323) to rotate synchronously. The connecting rod (323) generates up-and-down pushing and pulling force on the first sliding plate (321) through the second central rod (322), causing the first sliding plate (321) to move up and down reciprocally inside the fixed frame (301). When the first sliding plate (321) slides upward, it drives the first elastic sheet (331) to slide synchronously, so that the bottom of the first elastic sheet (331) is separated from the groove restriction of the fixed frame (301) and bends outward under its own elastic force, forming an arc-shaped flow guide surface on the side wall of the first sliding plate (321). During the flow process, the polishing medium is guided by the arc surface of the first elastic sheet (331), further disturbing the polishing medium between the two fixed frames (301).

[0014] When the first sliding plate (321) slides upward, the first elastic sheet (331) on both sides of the first sliding plate (321) unfolds and bends upward, while the second elastic sheet (332) drives the second sliding plate (333) to slide upward. The multiple second sliding plates (333) divide the waves formed by the vibration of the polishing medium in the vibration groove (4) in the polishing medium, and weaken the vibration fluctuation of the polishing liquid surface in the groove. When the second sliding plate (333) slides upward, the second sliding plate (333) has an elastic sway amplitude between the two second elastic plates (332). Due to the resistance of the polishing medium, the sway amplitude of the second sliding plate (333) is reduced. When the two first elastic plates (331) unfold outward, the polishing liquid seeps into the space between the two first elastic plates (331). When the first sliding plate (321) slides downward to reset, the sidewalls of the first elastic plates (331) are squeezed together by the groove of the fixed frame (301) and move closer to each other. The space between the two first elastic plates (331) is gradually compressed as the second sliding plate (333) and the second elastic plate (332) reset. The liquid accumulated between the two first elastic plates (331) is sprayed out into the polishing medium through the holes in the sidewalls of the first elastic plates (331) as the space is compressed.

[0015] The support frame (122) is used to support the mold and drive the mold to descend, so that the mold needles are inserted into the grinding medium in the vibration groove (4); after the preset polishing time is reached, the lifting motor (123) drives the support frame (122) and the mold to rise, the mold is pushed to the next process, and the next set of molds to be repaired moves to this station, repeating the above polishing cycle.

[0016] A polishing method based on a polishing machine for capsule molds includes the following steps: S1: Pipe connection: Connect the left water pipe connector (5) and the right water pipe connector (3) to the external polishing liquid delivery equipment respectively, and connect the inlet water pipe connector (8) and the outlet water pipe connector (9) to the external hot water tank inlet water pipe and outlet water pump respectively. S2: Medium delivery: Polishing liquid is delivered into the vibrating tank (4) through a polishing liquid delivery device, and polishing particles are placed inside the vibrating tank (4). Then, the hot water inside the hot water tank is circulated in the interlayer inside the vibrating tank (4) by the operation of the water pump. S3: Vibration polishing: The lifting rod (201) controls the vibration groove (4) to rise to the position of the adhesive dipping groove. The vibration motors fixedly connected to the left and right sides of the vibration groove (4) generate periodic excitation force, driving the vibration groove (4) to perform three-dimensional composite vibration on the spring, so that the polishing medium inside the vibration groove (4) forms a spiral rolling motion, generating relative friction and micro-impact with the surface of the mold needle, thereby achieving polishing.

[0017] The advantages of this invention are: 1. The lifting rod drives the vibration groove to rise to the original glue-dipping groove position, and the support frame drives the mold to directly extend into the vibration groove for polishing. There is no need to disassemble the mold from the production line, which shortens the repair time from several days to several hours.

[0018] 2. The vibration motor drives the eccentric block to rotate and generate excitation force, which is transmitted through the spring to make the vibration groove perform three-dimensional composite vibration. The polishing medium forms three composite movements: up and down vibration, inward and outward flipping, and spiral rotation. This ensures that each surface of the mold needle is polished evenly without damaging the dimensional accuracy.

[0019] 3. The polishing medium impacts the counterweight ball, which, through the linkage of the vertical rod, the first central rod, the connecting rod, and the second central rod, drives the first sliding plate to move up and down reciprocally. The first elastic sheet bends to form an arc-shaped guide surface, continuously disturbing the medium and preventing particles from settling and depositing.

[0020] 4. The second elastic plate drives the second sliding plate to extend upward to near the liquid surface, dividing the waves formed by the vibration of the polishing medium in the vibration tank, weakening the liquid surface ripples, and reducing the outward splashing of the polishing medium.

[0021] 5. The second sliding plate is flexibly connected by the second elastic sheet. Its swing amplitude is reduced due to the resistance of the polishing medium, avoiding rigid collision with the downward moving die pin and protecting the integrity of the die pin surface.

[0022] 6. When the first sliding plate is reset downwards, the first elastic plates are pressed close to each other, and the liquid accumulated in their space is quickly sprayed out through the water outlet hole on the side wall to form a jet, which reduces the air bubbles caused by the change in volume inside the fixed frame and avoids pitting on the surface of the mold needle.

[0023] 7. The electric heater and temperature sensor inside the hot water tank work together with the control system to ensure that hot water enters the vibration tank interlayer through the inlet pipe joint and flows back from the outlet pipe joint, maintaining a constant water temperature of 50℃ to ensure that the polishing liquid can achieve its repair effect.

[0024] 8. The pusher rack meshes with the gearbox. When the unidirectional pusher slides forward, it pushes against the mold end plate. When it slides in the reverse direction, it flips over around the hinge point to avoid it, thus realizing stable step-by-step conveying of the mold. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of a partial structure of the present invention.

[0026] Figure 2 This is a schematic diagram showing the connection relationship between the hot water tank, inlet, outlet and water pump of the present invention.

[0027] Figure 3 This is a schematic diagram of the working state of the mold of the present invention, which is driven by the glue-dipped hanger and servo motor to descend into the vibration tank.

[0028] Figure 4 This is a three-dimensional isometric schematic diagram of the present invention.

[0029] Figure 5 yes Figure 4 A schematic diagram of a partial cross-sectional structure.

[0030] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0031] Figure 7 This is a schematic diagram of the drive component and lifting component of the present invention.

[0032] Figure 8 This is a partial cross-sectional schematic diagram of the vibration component in the polishing mechanism of the present invention.

[0033] Figure 9 This is a partial cross-sectional view of the auxiliary mechanism of the present invention.

[0034] Figure 10 yes Figure 9 A schematic diagram of the swing component.

[0035] Figure 11 yes Figure 9 A half-section plan view of the auxiliary mechanism.

[0036] Figure 12 This is a schematic diagram of the polishing method of the present invention. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0038] See Figures 1 to 12 This invention relates to a polishing machine for capsule molds, comprising a main body 100 and a polishing mechanism 200, wherein the polishing mechanism 200 is installed inside the main body 100 and is used to polish the mold; the polishing mechanism 200 includes lifting rods 201 and vibration components 21 fixedly connected inside the main body 100, wherein four lifting rods 201 are arranged in pairs and symmetrically distributed with the center of the main body 100 as the center; the vibration components 21 are installed on the top of the two sets of lifting rods 201 and are used to polish the mold by high-frequency vibration; the vibration components 21 include a base plate 1 fixedly connected to the output end of the two sets of lifting rods 201, wherein a plurality of springs 2 are fixedly connected to the top of the base plate 1, and a vibration groove 4 is fixedly connected to the top of the plurality of springs; a vibration motor is fixedly connected to the left and right sides of the vibration groove 4, and an eccentric block with adjustable amplitude is installed on the shaft of the vibration motor; A water inlet pipe connector 8 is fixedly installed on the front of the vibration tank 4, a left water pipe connector 3 is fixedly installed on the left outer wall of the vibration tank 4, and a right water pipe connector 5 is fixedly connected to the right outer wall; a water outlet pipe connector 9 is fixedly connected to the right side of the vibration tank 4, and an internal interlayer is provided inside the vibration tank 4, and both the water inlet pipe connector 8 and the water outlet pipe connector 9 are connected to the internal interlayer of the vibration tank 4. The auxiliary mechanism 3 is installed inside the vibration groove 4 to prevent the polishing medium from splashing during the polishing process; the auxiliary mechanism 3 includes several fixing frames 301 installed on the bottom inner wall of the vibration groove 4.

[0039] The output end of the lifting rod 201 is fixedly connected to the base plate 1. The base plate 1 is elastically connected to the vibration groove 4 via a spring 2. The main body 100 has a glue-dipping groove mounting position, and the glue-dipping groove and the vibration groove 4 are interchangeable in the height direction. When polishing is required, the glue-dipping groove is removed from its original position, and the lifting rod 201 drives the vibration groove 4 to rise to the original position of the glue-dipping groove. Simultaneously, the support frame 122 is slidably connected to the mounting plate 121, and the lifting motor 123 drives the support frame 122 to rise and fall, allowing the mold to directly extend into the vibration groove 4 for polishing. The synergistic effect of the above component connections allows the mold to be polished and repaired online without being removed from the production line, reducing the repair time from several days to several hours, thus improving production efficiency and equipment utilization.

[0040] Vibration motor 6 is fixedly connected to the outer walls of the left and right sides of vibration groove 4. An eccentric block 7 is mounted on the shaft of vibration motor 6, and vibration groove 4 is elastically supported on base plate 1 by spring 2. When vibration motor 6 drives eccentric block 7 to rotate at high speed, the centrifugal force generated is transmitted as excitation force through spring 2, driving vibration groove 4 to perform three-dimensional composite vibration: spring 2 is repeatedly compressed and stretched to produce up-and-down vibration, the height difference between vibration motor 6 and spring 2 produces pitching force to produce a rectangular flipping motion, and the cavity boundary constraint of fixed frame 301 combines the two into a spiral rotational motion. The three motions are superimposed synchronously, so that the polishing medium forms a complete spiral tumbling flow, polishing each surface of the mold needle with equal force, without damaging dimensional accuracy and edges, and achieving high-quality uniform polishing.

[0041] The vibrating tank 4 has an internal jacket. Both the inlet pipe connector 8 and the outlet pipe connector 9 are connected to this jacket. The inlet pipe connector 8 is connected to the outlet 12 of the water pump 13, and the outlet pipe connector 9 is connected to the inlet 11 of the hot water tank 10. The hot water tank 10 contains an electric heater and a temperature sensor. Through these connections, hot water from the hot water tank 10 is pumped into the jacket of the vibrating tank 4 by the water pump 13. After absorbing heat, it flows back to the hot water tank 10 via the outlet pipe connector 9, forming a circulation loop. This, combined with the control system, maintains the water temperature in the vibrating tank 4 at a constant 50°C, the optimal working temperature for the polishing fluid, thus improving the consistency of polishing quality.

[0042] The main body 100 includes a drive assembly 110, which is installed on the top of the main body 100 and is used to drive the mold for conveying. The drive assembly 110 includes a fixed frame 111 fixedly connected to the top of the main body 100, and gearboxes 112 are fixedly installed on the left and right inner walls of the fixed frame 111. The gearbox 112 has two meshing push rods 113 inside. The bottom of each push rod 113 is rotatably connected to a one-way push bar 114. The one-way push bar 114 is a ratchet-type push plate hinged to the bottom surface of the push rod 113. When the one-way push bar 114 slides in the forward direction, it pushes against the mold end plate. When it slides in the reverse direction, it flips over around the hinge point to avoid it. The drive component 110 enables the step-by-step conveying of the mold on the production line, and its working process is as follows: An external drive motor drives the gears inside the gearbox 112 to rotate. The gears, through meshing with the push rack 113, convert the rotational motion into the horizontal reciprocating linear motion of the push rack 113. A one-way push bar 114 is hinged to the bottom of the push rack 113. This one-way push bar has a ratchet-type push plate structure and can only swing in one direction.

[0043] When the pusher rack 113 slides forward in the direction of mold conveying, the lower end of the one-way pusher bar 114 abuts against the back of the mold end plate. Due to the obstruction of the mold end plate, the one-way pusher bar 114 cannot swing backward, thereby transmitting the horizontal thrust of the pusher rack 113 to the mold and pushing the mold forward one station along the conveying direction.

[0044] When the push rod 113 slides back to its original position, the one-way push bar 114 is blocked by the mold end plate, flips forward around its hinge point, and slides across the mold surface without causing the mold to move backward. After the one-way push bar 114 has completely passed the mold, it automatically returns to a vertical state under its own gravity, ready for the next forward push.

[0045] In this way, the pusher rack 113 slides back and forth under the drive of the gearbox 112, and with the unidirectional pushing function of the unidirectional pusher bar 114, the mold is intermittently conveyed forward in a step-by-step manner, ensuring that each push of a set of molds accurately reaches the work position of the support frame 122.

[0046] A lifting assembly 120 is installed on the side wall of the main body 100 and is used to drive the mold to slide up and down. The lifting assembly 120 includes a mounting plate 121 fixedly installed on the front and back of the fixed frame 111, and a support frame 122 is slidably connected to the side of the mounting plate 121 away from the fixed frame 111. A lifting motor 123 is fixedly connected to the side of the mounting plate 121 near the support frame 122. The output end of the lifting motor 123 is rotatably connected to the top of the support frame 122 to drive the support frame 122 to rise and fall.

[0047] The lifting assembly 120 enables the vertical lifting of the mold, and its working process is as follows: The lifting motor 123 is fixedly mounted on the mounting plate 121, and its output end is rotatably connected to the top of the support frame 122 through a transmission mechanism such as a lead screw or synchronous belt. The two ends of the support frame 122 are slidably connected in the vertical slide grooves of the mounting plate 121, and can only slide up and down along the direction of the slide groove.

[0048] When the lifting motor 123 rotates in the forward direction, its output end drives the support frame 122 to slide downward along the slide groove of the mounting plate 121 through the transmission mechanism, thereby lowering the mold supported on the support frame 122 to the working position of the glue application station or the polishing station. When the lifting motor 123 rotates in the reverse direction, the support frame 122 slides upward along the slide groove, thereby raising the mold to its original position.

[0049] In normal glue-dipping mode, the support frame 122 lowers the mold to the glue-dipping tank for glue dipping, and then raises it after glue dipping is completed. In polishing mode, the glue-dipping tank is removed, and the vibration tank 4 is raised to the original position of the glue-dipping tank under the drive of the lifting rod 201. The support frame 122 lowers the mold so that the mold pins are inserted into the grinding medium in the vibration tank 4 for polishing. After polishing is completed, the support frame 122 raises the mold, and then the push rod 113 of the drive assembly 110 pushes the mold to the next process.

[0050] The auxiliary mechanism 300 also includes a swing component 310, which is installed inside the fixed frame 301 and is used to agitate the polishing medium. The swing assembly 31 includes a first central rod 311 rotatably connected inside the fixed frame 301. A plurality of vertical rods 312 are fixedly connected to the outer surface of the first central rod 311, and a counterweight ball is fixedly connected to the bottom of the vertical rods 312. A connecting component 32 is mounted on top of the swing component 31 and is used to slide up and down following the swing of the swing component 31. The connecting assembly 32 includes a first sliding plate 321 slidably connected inside the fixed frame 301. The bottom of the first sliding plate 321 is rotatably connected to two second central rods 322. The bottom of the second central rods 322 is rotatably connected to a connecting rod 323. The connecting rod 323 is fixedly connected to the outer surface of two of the vertical rods 312. The movable component 33 is installed on top of the connecting component 32 to prevent collision with the mold. The movable component 33 includes two first elastic pieces 331 fixedly connected to the top of the first sliding plate 321, and a plurality of water outlet holes are provided on the side wall of the first elastic pieces 331. A second elastic piece 332 is fixedly installed on the side of the first elastic piece 331 away from the first sliding plate 321, and the first sliding plate 333 is fixedly connected between the two second elastic pieces 332.

[0051] The auxiliary mechanism 300, through the coordinated operation of the swing component 310, the connecting component 320, and the movable component 330, achieves continuous disturbance of the polishing medium, suppression of liquid surface fluctuations, and elimination of air bubbles. The specific working principle is as follows: When the vibration groove 4 vibrates at high frequency, the polishing medium flows within the groove, and the flowing medium impacts the counterweight ball 313 at the bottom of the vertical rod 312. Since the counterweight ball 313 has a certain mass, it generates inertial oscillation under the impact of the medium, causing the vertical rod 312 and the first central rod 311 fixedly connected to it to oscillate synchronously around the axis of the fixed frame 301.

[0052] When the first central rod 311 swings, the connecting rod 323, which is fixedly connected to the outer surface of the vertical rod 312, moves synchronously with the vertical rod 312. The connecting rod 323 forms a hinged linkage mechanism with the bottom of the first sliding plate 321 through the second central rod 322, which converts the swinging motion of the vertical rod 312 into a vertical pushing and pulling force on the first sliding plate 321, causing the first sliding plate 321 to slide up and down along the groove on the inner wall of the fixed frame 301.

[0053] When the first sliding plate 321 slides upward, the first elastic piece 331 fixedly connected to its top moves upward synchronously. After the bottom of the first elastic piece 331 is released from the slot restriction of the fixed frame 301, it bends outward under its own elastic force, and the upper ends of the two first elastic pieces 331 move away from each other, forming an arc-shaped guide surface on both sides of the top surface of the first sliding plate 321.

[0054] During the flow of the polishing medium, it is guided by the arc-shaped guide surface of the first elastic sheet 331, and the flow direction changes, further disturbing the polishing medium between the two fixed frames 301. With the continuous stirring of the counterweight ball 313, the polishing medium is always in a disturbed state during the vibration process, effectively preventing the polishing particles from settling and depositing.

[0055] When the first sliding plate 321 slides upward and the first elastic sheet 331 unfolds and bends outward, the second elastic sheet 332, which is fixedly connected to the outer surface of the first elastic sheet 331, also expands outward, causing the second sliding plate 333, which is fixedly connected between the two second elastic sheets 332, to slide upward and extend to the vicinity of the polishing medium liquid surface.

[0056] Multiple second sliding plates 333 form a partition structure near the liquid surface, which divides the large waves generated by the vibration of the polishing medium in the vibration tank 4 into multiple small waves, thereby weakening the vibration fluctuation of the polishing liquid surface in the tank and reducing the splashing of the polishing medium outward.

[0057] Meanwhile, the second sliding plate 333 is flexibly connected to the first elastic plate 331 through the second elastic plate 332. When the vibration groove 4 vibrates and drives the fixed frame 301 to swing, the second sliding plate 333 is affected by the resistance of the polishing medium and produces a damping effect, which slows down its swing amplitude, avoids rigid collision with the downward moving die needle, and protects the integrity of the die needle surface.

[0058] When the first sliding plate 321 slides downwards to reset, the sidewalls of the first elastic plates 331 are squeezed together by the groove of the fixed frame 301. The space between the two first elastic plates 331 is gradually compressed as the second sliding plate 333 and the second elastic plate 332 reset. As the space is compressed, the liquid accumulated between the two first elastic plates 331 is rapidly sprayed out through the water outlet holes on the sidewalls of the first elastic plates 331 into the area between the two second sliding plates 333 in the polishing medium, forming a large number of uniform jets.

[0059] This jet can effectively reduce the occurrence of air bubbles in the polishing liquid due to changes in the internal channel volume of the fixed frame 301 during the back-and-forth sliding of the first sliding plate 321 within the fixed frame 301. It also prevents pitting on the surface of the die needle after the air bubbles break on the liquid surface, further enhancing the surface integrity during the die needle polishing process.

[0060] Hot water circulates within the interlayer of the outer wall of the vibration tank 4. The temperature of the hot water is maintained constant by the hot water tank 10 and the control box. An electric heater and a temperature sensor are installed inside the hot water tank 10. The inlet pipe connector 8 is connected to the outlet 12 of the water pump 13, and the outlet pipe connector 9 is connected to the inlet 11 of the hot water tank 10. The electric heater and temperature sensor inside the hot water tank 10 monitor the water temperature in real time and feed it back to the control box. The control box controls the electric heater to operate according to the set value, keeping the water temperature inside the hot water tank 10 constant at 50℃. The water pump 13 pumps the hot water from the outlet 12 of the hot water tank 10 into the interlayer of the vibration tank 4 through the inlet pipe connector 8. After circulating within the interlayer, the hot water flows back to the hot water tank 10 through the outlet pipe connector 9 and the inlet 11 of the hot water tank 10, forming a closed-loop circulation circuit. This constant-temperature circulation system continuously replenishes the jacket with constant-temperature hot water, keeping the temperature of the polishing liquid in the vibration tank 4 stable at 50℃. This ensures that the chemical components in the polishing liquid are always in the best active state, achieving the best surface repair effect. At the same time, it avoids inconsistent polishing results due to temperature fluctuations, effectively improving the stability and consistency of polishing quality.

[0061] The vibration motor 6 generates a high-frequency periodic excitation force with a frequency of 10-50Hz and an amplitude controlled at 2-10mm. This drives the vibration groove 4 to perform three-dimensional composite vibration on the top of the spring 2, causing the polishing medium inside the vibration groove 4 to form a spiral rolling motion within the vibration groove 4. This motion includes three composite motion forms: up-and-down vibration, inward-outward flipping, and spiral rotation. It also generates continuous and uniform relative friction and impact with the die needle surface, thereby removing defects on the die needle surface and achieving a smooth finish.

[0062] Vibration motor 6 drives eccentric block 7 to rotate, generating high-frequency periodic excitation force with a frequency of 10-50Hz and an amplitude of 2-10mm. Through the elastic transmission of spring 2, the vibration groove 4 generates composite vibration in three spatial dimensions, including up-and-down vibration formed by repeated compression and stretching of spring 2, pitching and turning torque generated by the height difference between vibration motor 6 and spring 2, and spiral rotation motion synthesized by the boundary constraint of fixed frame 301 cavity. The three motion forms are synchronously superimposed, driving the polishing medium to form a complete three-dimensional spiral tumbling flow, so that each surface of the mold needle is evenly stressed, achieving non-directional uniform polishing. While thoroughly removing surface scratches and defects, it does not damage the original dimensional accuracy and angular structure of the mold needle, effectively realizing the molding accuracy and service life of capsule mold.

[0063] A glue-dip tank mounting position is also provided on the main body 100. When polishing is required, the glue-dip tank is removed from its original position, and the vibrating tank 4 is raised to the original position of the glue-dip tank by the lifting rod 201. The glue-dip tank and the vibrating tank 4 are located at the same station in the height direction and are interchangeable. When polishing is required, only the glue-dip tank needs to be removed from its original position, and the lifting rod 201 can drive the vibrating tank 4 to rise precisely to the original height position of the glue-dip tank, so that the upper edge of the groove of the vibrating tank 4 corresponds precisely to the lower end of the mold pin after the support frame 122 is lowered. This structure achieves seamless switching of the polishing function by utilizing the original glue-dip station of the production line without any modification to the main structure of the production line. After polishing is completed, the glue-dip tank can be reinstalled to restore normal production, which greatly reduces the equipment modification cost and the difficulty of station switching.

[0064] When the vibration groove 4 vibrates, the polishing medium flows in the groove and impacts the counterweight ball 313, causing the counterweight ball 313 to drive the vertical rod 312 and the first central rod 311 to swing synchronously. The first central rod 311 drives the connecting rod 323 to rotate synchronously. The connecting rod 323 generates an up-and-down pushing and pulling force on the first sliding plate 321 through the second central rod 322, causing the first sliding plate 321 to move up and down reciprocally inside the fixed frame 301. When the first sliding plate 321 slides upward, it drives the first elastic sheet 331 to slide synchronously, causing the bottom of the first elastic sheet 331 to disengage from the groove restriction of the fixed frame 301 and bend outward under its own elastic force, forming an arc-shaped flow guide surface on the side wall of the first sliding plate 321. During the flow process, the polishing medium is guided by the arc surface of the first elastic sheet 331, further disturbing the polishing medium between the two fixed frames 301.

[0065] When the first sliding plate 321 slides upward, the first elastic sheet 331 on both sides of the first sliding plate 321 unfolds and bends upward, while the second elastic sheet 332 drives the second sliding plate 333 to slide upward. The multiple second sliding plates 333 divide the waves formed by the vibration of the polishing medium in the vibration groove 4 in the polishing medium, thereby weakening the vibration fluctuation of the polishing liquid surface in the groove. When the second sliding plate 333 slides upward, the second sliding plate 333 has an elastic sway amplitude between the two second elastic plates 332. Affected by the resistance of the polishing medium, the sway amplitude of the second sliding plate 333 is reduced. When the two first elastic plates 331 unfold outward, the polishing liquid seeps into the space between the two first elastic plates 331. When the first sliding plate 321 slides downward to reset, the sidewalls of the first elastic plates 331 are squeezed together by the groove of the fixed frame 301 and move closer to each other. The space between the two first elastic plates 331 is gradually compressed as the second sliding plate 333 and the second elastic plate 332 reset. The liquid accumulated between the two first elastic plates 331 is sprayed out into the polishing medium through the holes in the sidewalls of the first elastic plates 331 as the space is compressed.

[0066] The support frame 122 is used to support the mold and drive the mold to descend, so that the mold needles can be inserted into the grinding medium in the vibration groove 4. After the preset polishing time is reached, the lifting motor 123 drives the support frame 122 and the mold to rise, and the mold is pushed to the next process. The next set of molds to be repaired moves to this station and repeats the above polishing cycle.

[0067] The present invention also relates to a polishing method based on a polishing machine for capsule molds, comprising the following steps: S1: Pipe connection: Connect the left water pipe connector 5 and the right water pipe connector 3 to the external polishing liquid delivery equipment respectively, and connect the inlet water pipe connector 8 and the outlet water pipe connector 9 to the external hot water tank inlet water pipe and outlet water pump respectively. S2: Medium delivery: Polishing liquid is delivered into the vibrating tank 4 through a polishing liquid delivery device, and polishing particles are placed inside the vibrating tank 4. Then, the hot water in the hot water tank is circulated in the interlayer inside the vibrating tank 4 by the operation of the water pump. S3: Vibration polishing: The lifting rod 201 controls the vibration groove 4 to rise to the position of the adhesive dipping groove. The vibration motors fixedly connected to the left and right sides of the vibration groove 4 generate periodic excitation force, driving the vibration groove 4 to perform three-dimensional composite vibration on the spring. This causes the polishing medium inside the vibration groove 4 to form a spiral rolling motion, generating relative friction and micro-impact with the surface of the mold needle, thereby achieving polishing.

[0068] In step S1, the left water pipe connector 5 and the right water pipe connector 3 are connected to the external polishing liquid delivery equipment, respectively. Simultaneously, the inlet water pipe connector 8 and the outlet water pipe connector 9 are connected to the inlet and outlet water pumps of the external hot water tank, respectively. This step, through standardized pipe connector design, enables rapid connection of the polishing liquid delivery equipment and the constant temperature hot water circulation system, allowing the entire pipeline setup and switching to be completed within minutes. When normal adhesive dipping production needs to be resumed, simply disconnecting each pipe connector restores the system. The operation is simple and quick, shortening the switching time between adhesive dipping and polishing modes and improving the flexibility of production organization.

[0069] In step S2, polishing fluid is delivered into the vibrating tank 4 via a polishing fluid delivery device, and polishing particles are placed inside the vibrating tank 4. Simultaneously, a water pump circulates hot water from the hot water tank within the jacket of the vibrating tank 4. This step achieves the simultaneous quantitative supply of polishing medium (polishing fluid + polishing particles) and constant-temperature hot water circulation within the jacket. Utilizing the jacket structure design of the vibrating tank 4, the hot water exchanges heat with the polishing medium through the tank walls as it flows within the jacket, rapidly and uniformly raising the temperature of the polishing fluid in the vibrating tank 4 to 50°C. This ensures that the chemical components in the polishing fluid reach their optimal active state before the mold enters the polishing station, avoiding time wasted waiting for heating and improving the preparation efficiency of the polishing operation.

[0070] In step S3, the lifting rod 201 drives the vibration groove 4 to rise to the original position of the adhesive dipping groove. The support frame 122 drives the mold to descend, causing the mold pin to extend into the polishing medium in the vibration groove 4. The vibration motor 6 drives the vibration groove 4 to perform three-dimensional composite vibration on the spring 2, causing the polishing medium to form a spiral rolling motion, generating relative friction and micro-impact with the surface of the mold pin, thus achieving polishing. This step utilizes the substitution relationship between the adhesive dipping groove and the vibration groove 4 in the height direction to accurately position the vibration groove 4 at the original adhesive dipping position. The support frame 122 directly sends the mold into the vibration groove 4 in the adhesive dipping action mode, realizing online polishing and repair of the mold without disassembling it from the production line. This eliminates the steps of mold disassembly, transportation, and reinstallation in traditional offline polishing, shortening the repair cycle from several days to several hours. At the same time, the spiral rolling flow generated by the three-dimensional composite vibration ensures that the polishing medium exerts equal force on each surface of the mold pin, ensuring that surface scratches and defects are removed efficiently without damaging the dimensional accuracy and angular structure of the mold pin.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A polishing machine for capsule molds, comprising a main body (100), characterized in that, Also includes: A polishing mechanism (200) is installed inside the main body (100) and is used to polish the mold. The polishing mechanism (2) includes a lifting rod (201) and a vibration component (21) fixedly connected inside the main body (100). The four lifting rods (201) are arranged in pairs and symmetrically distributed with the middle of the main body (100) as the center. The vibration component (21) is installed on the top of the two sets of lifting rods (201) and is used to polish the mold by high-frequency vibration. The vibration component (21) includes a base plate (1) fixedly connected to the output end of the two sets of lifting rods (201). Several springs (2) are fixedly connected to the top of the base plate (1). Vibration grooves (4) are fixedly connected to the top of the several springs. Vibration motors are fixedly connected to the left and right sides of the vibration grooves (4). An eccentric block with adjustable amplitude is installed on the shaft of the vibration motor. A water inlet pipe connector (8) is fixedly installed on the front of the vibration groove (4), a left water pipe connector (3) is fixedly installed on the left outer wall of the vibration groove (4), and a right water pipe connector (5) is fixedly connected to the right outer wall; a water outlet pipe connector (9) is fixedly connected to the right side of the vibration groove (4), and a sandwich layer is provided inside the vibration groove (4), and both the water inlet pipe connector (8) and the water outlet pipe connector (9) are connected to the sandwich layer inside the vibration groove (4); The auxiliary mechanism (3) is installed inside the vibration groove (4) to prevent the polishing medium from splashing during the polishing process; the auxiliary mechanism (3) includes several fixed frames (301) installed on the bottom inner wall of the vibration groove (4).

2. A polishing machine for capsule molds according to claim 1, characterized in that, The main body (100) includes a drive assembly (110), which is mounted on the top of the main body (100) and is used to drive the mold for conveying. The drive assembly (110) includes a fixed frame (111) fixedly connected to the top of the main body (100), and gearboxes (112) are fixedly mounted on the left and right inner walls of the fixed frame (111). The gearbox (112) has two meshing push rods (113) inside. The bottom of the push rod (113) is rotatably connected to a one-way push bar (114). The one-way push bar (114) is a pawl-type push plate hinged to the bottom surface of the push rod (113). When the one-way push bar (114) slides in the forward direction, it pushes against the mold end plate. When it slides in the reverse direction, it flips over around the hinge point to avoid it. The lifting assembly (120) is installed on the side wall of the main body (100) and is used to drive the mold to slide up and down. The lifting assembly (12) includes a mounting plate (121) fixedly installed on the front and back of the fixed frame (111), and a support frame (122) is slidably connected to the side of the mounting plate (121) away from the fixed frame (111). A lifting motor (123) is fixedly connected to the side of the mounting plate (121) near the support frame (122). The output end of the lifting motor (123) is rotatably connected to the top of the support frame (122) to drive the support frame (122) to lift.

3. A polishing machine for capsule molds according to claim 1, characterized in that, The auxiliary mechanism (300) also includes a swing assembly (310), which is installed inside the fixed frame (301) and is used to agitate the polishing medium. The swing assembly (31) includes a first central rod (311) rotatably connected inside the fixed frame (301), and a plurality of vertical rods (312) are fixedly connected to the outer surface of the first central rod (311), and a counterweight ball is fixedly connected to the bottom of the vertical rods (312). A connecting component (32) is mounted on top of the swing component (31) and is used to slide up and down following the swing of the swing component (31); The connecting assembly (32) includes a first sliding plate (321) slidably connected inside the fixed frame (301), two second central rods (322) are rotatably connected to the bottom of the first sliding plate (321), and a connecting rod (323) is rotatably connected to the bottom of the second central rods (322), and the connecting rod (323) is fixedly connected to the outer surface of two of the vertical rods (312). An active component (33) is mounted on top of the connecting component (32) to prevent collision with the mold; The active component (33) includes two first elastic plates (331) fixedly connected to the top of the first sliding plate (321), and a plurality of water outlet holes are provided on the side wall of the first elastic plate (331); A second elastic sheet (332) is fixedly installed on the side of the first elastic sheet (331) away from the first sliding plate (321), and a first sliding plate (333) is fixedly connected between the two second elastic sheets (332).

4. A polishing machine for capsule molds according to claim 2 or 3, characterized in that, Hot water circulates in the interlayer of the outer wall of the vibration groove (4). The temperature of the hot water is kept constant by the hot water tank (10) and the control box. An electric heater and a temperature sensor are installed in the hot water tank (10). The inlet pipe connector (8) is connected to the outlet (12) of the water pump (13), and the outlet pipe connector (9) is connected to the inlet (11) of the hot water tank (10).

5. A polishing machine for capsule molds according to claim 4, characterized in that, The vibration motor (6) generates a high-frequency periodic excitation force with a frequency of 10-50Hz and an amplitude controlled at 2-10mm. It drives the vibration groove (4) to perform three-dimensional composite vibration on the top of the spring (2), causing the polishing medium inside the vibration groove (4) to form a spiral rolling motion within the vibration groove (4). This motion includes three composite motion forms: up and down vibration, inward and outward flipping, and spiral rotation. It also generates continuous and uniform relative friction and impact with the die needle surface, thereby removing defects on the die needle surface and obtaining a smooth finish.

6. A polishing machine for capsule molds according to claim 2, characterized in that, The main body (100) is also provided with a glue-dip tank installation position. When polishing is required, the glue-dip tank is removed from its original position, and the vibration tank (4) is raised to the original position of the glue-dip tank by the lifting rod (201).

7. A polishing machine for capsule molds according to claim 3, characterized in that, When the vibration groove (4) vibrates, the polishing medium flows in the groove and impacts the counterweight ball (313), causing the counterweight ball (313) to drive the vertical rod (312) and the first central rod (311) to swing synchronously. The first central rod (311) drives the connecting rod (323) to rotate synchronously. The connecting rod (323) generates up-and-down pushing and pulling force on the first sliding plate (321) through the second central rod (322), causing the first sliding plate (321) to move up and down reciprocally inside the fixed frame (301). When the first sliding plate (321) slides upward, it drives the first elastic sheet (331) to slide synchronously, so that the bottom of the first elastic sheet (331) is separated from the groove restriction of the fixed frame (301) and bends outward under its own elastic force, forming an arc-shaped flow guide surface on the side wall of the first sliding plate (321). During the flow process, the polishing medium is guided by the arc surface of the first elastic sheet (331), further disturbing the polishing medium between the two fixed frames (301).

8. A polishing machine for capsule molds according to claim 3, characterized in that, When the first sliding plate (321) slides upward, the first elastic sheet (331) on both sides of the first sliding plate (321) unfolds and bends upward, while the second elastic sheet (332) drives the second sliding plate (333) to slide upward. The multiple second sliding plates (333) divide the waves formed by the vibration of the polishing medium in the vibration groove (4) in the polishing medium, and weaken the vibration fluctuation of the polishing liquid surface in the groove. When the second sliding plate (333) slides upward, the second sliding plate (333) has an elastic sway amplitude between the two second elastic plates (332). Due to the resistance of the polishing medium, the sway amplitude of the second sliding plate (333) is reduced. When the two first elastic plates (331) unfold outward, the polishing liquid seeps into the space between the two first elastic plates (331). When the first sliding plate (321) slides downward to reset, the sidewalls of the first elastic plates (331) are squeezed together by the groove of the fixed frame (301) and move closer to each other. The space between the two first elastic plates (331) is gradually compressed as the second sliding plate (333) and the second elastic plate (332) reset. The liquid accumulated between the two first elastic plates (331) is sprayed out into the polishing medium through the holes in the sidewalls of the first elastic plates (331) as the space is compressed.

9. A polishing machine for capsule molds according to claim 2, characterized in that, The support frame (122) is used to support the mold and drive the mold to descend, so that the mold needles are inserted into the grinding medium in the vibration groove (4); after the preset polishing time is reached, the lifting motor (123) drives the support frame (122) and the mold to rise, the mold is pushed to the next process, and the next set of molds to be repaired moves to this station, repeating the above polishing cycle.

10. A polishing method for a polishing machine for capsule molds based on any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Pipe connection: Connect the left water pipe connector (5) and the right water pipe connector (3) to the external polishing liquid delivery equipment respectively, and connect the inlet water pipe connector (8) and the outlet water pipe connector (9) to the external hot water tank inlet water pipe and outlet water pump respectively. S2: Medium delivery: Polishing liquid is delivered into the vibrating tank (4) through a polishing liquid delivery device, and polishing particles are placed inside the vibrating tank (4). Then, the hot water inside the hot water tank is circulated in the interlayer inside the vibrating tank (4) by the operation of the water pump. S3: Vibration polishing: The lifting rod (201) controls the vibration groove (4) to rise to the position of the adhesive dipping groove. The vibration motors fixedly connected to the left and right sides of the vibration groove (4) generate periodic excitation force, driving the vibration groove (4) to perform three-dimensional composite vibration on the spring, so that the polishing medium inside the vibration groove (4) forms a spiral rolling motion, generating relative friction and micro-impact with the surface of the mold needle, thereby achieving polishing.

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