A high-precision positioning device for a plastic mold

Abstract

The present invention discloses a high-precision positioning device for a plastic mold, which includes a moving mold and a fixed mold. A positioning hole is provided at one end of the fixed mold relative to the moving mold, and a positioning post that is slidably and adaptively matched with the positioning hole is provided at one end of the moving mold relative to the fixed mold. A triggering assembly is arranged in the positioning hole, positioning plates are arranged in a circular array along the center on the positioning post, a driving assembly is arranged at the center inside the positioning post, and the driving assembly is slidably matched with the positioning plates. During use, when the positioning post moves to cooperate with the triggering assembly, the driving assembly moves towards the moving mold under the action of the triggering assembly, and then acts on the positioning plates to move towards the positioning hole, thereby realizing the adaptation of the inner wall of the positioning plate to the positioning hole. It is realized that the positioning plate can automatically move out of the positioning post according to the gap between the positioning post and the positioning hole to adapt to the positioning hole, thus ensuring the stability between the moving mold and the fixed mold, and eliminating the need for manual adjustment work.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molds, and specifically to a high-precision positioning device for plastic molds. Background Art

[0002] Plastic molds are important tools for producing plastic products and are widely used in multiple industries such as automotive, electronics, household appliances, medical, and packaging. During the use of plastic molds, positioning devices are required to ensure the precise fitting of the moving mold and the stationary mold, thereby improving the quality of plastic molding.

[0003] Chinese Patent Publication No.: CN213648487U discloses a portable positioning device for plastic molds, including a bottom mold and a top mold. Positioning grooves are respectively formed in the peripheral walls of the top of the bottom mold. Sealing rings are provided on the outer walls of the corresponding positioning grooves on the top wall of the bottom mold. A groove is also formed in the wall at the middle position of the top of the bottom mold. A fixing plate is provided on the bottom wall of the top mold, a convex block is provided on the bottom wall at the middle position of the fixing plate, and positioning mechanisms are respectively provided in the mounting grooves in the peripheral walls of the bottom of the fixing plate.

[0004] Although the above device can adjust the gap between the positioning post and the positioning groove through a spacer block, in the actual use process, when it is necessary to adjust the gap between the positioning post and the positioning groove through the spacer block, it is necessary to stop the machine first and then screw out the positioning post, and then rotate components such as the knob cover to achieve the adjustment of the spacer block. The operation is relatively cumbersome, and the adjusted spacer block cannot be adjusted in real time according to the gap between the positioning groove and the positioning post, having certain limitations.

[0005] Therefore, it is necessary to provide a high-precision positioning device for plastic molds to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-precision positioning device for plastic molds to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A high-precision positioning device for plastic molds, including a moving mold and a stationary mold. A positioning hole is provided at one end of the stationary mold opposite to the moving mold, and a positioning post that is slidably and adaptively matched with the positioning hole is provided at one end of the moving mold opposite to the stationary mold. A triggering component is arranged in the positioning hole, positioning plates are arranged in a circular array along the center on the positioning post, a driving component is arranged at the center inside the positioning post, and the driving component is slidably matched with the positioning plates. When the driving component moves towards the moving mold inside the positioning post, the driving component causes the positioning plates to move towards the periphery of the positioning post.

[0008] As a further solution of the present invention: the driving assembly includes a sleeve; the sleeve is slidably arranged in the center of the positioning column, and the end of the sleeve away from the movable mold slides through the bottom side wall of the positioning column, and the outer side wall of the sleeve close to the fixed mold is fixedly provided with a conical platform, the conical platform is arranged in the positioning column, and the end of the positioning plate close to the fixed mold is provided with an inclined surface that slides in contact with the conical platform, and the positioning plate is elastically connected to the side wall of the positioning column.

[0009] As a further solution of the present invention: an inner rod is slidably arranged in the sleeve, a connecting plate is fixedly connected to one end of the inner rod close to the movable mold, a limiting rod is fixedly arranged on one end of the connecting plate away from the inner rod, the limiting rod is arranged on a side of the connecting plate close to the positioning plate, an array of limiting holes that slidably cooperate with the limiting rod are arranged on one end of the positioning plate close to the movable mold, a sliding groove is arranged in the side wall of the positioning column, and the limiting rod is slidably arranged in the sliding groove.

[0010] As a further solution of the present invention: the trigger assembly includes a disc; the disc is slidably arranged in the positioning hole, a spring is arranged between the end of the disc away from the movable mold and the positioning hole, a through hole slidably adapted to the sleeve is arranged at the center of the disc, a buckle plate is symmetrically slidably arranged along the center at the end of the disc away from the movable mold, an extension plate is elastically connected to the side wall of the disc, and the end of the extension plate close to the through hole is fixedly connected to the buckle plate.

[0011] As a further solution of the present invention: the end of the disc away from the movable mold is provided with a clearance opening for the sliding of the buckle plate, and the inner wall of the positioning hole away from the movable mold is symmetrically provided with matching grooves that are slidably matched with the extension plate.

[0012] As a further solution of the present invention: a notch is provided on the periphery of one end of the disc close to the movable mold, a swivel is provided in the notch, the swivel is rotatably connected to the side wall of the disc, a wiping cotton is fixedly provided on the periphery of the swivel close to the positioning hole, the wiping cotton is slidably fitted with the inner wall of the positioning hole, an annular opening is provided at the center of the swivel, a storage cavity is symmetrically provided along the center of the side wall of the disc, a conveying path is provided between the storage cavity and the annular opening, an end of the conveying path away from the annular opening is connected to the storage cavity, and an end of the conveying path away from the storage cavity is correspondingly connected to the annular opening.

[0013] As a further solution of the present invention: an end of the storage chamber away from the movable mold is sealed and slidably connected with an extrusion rod, and the extrusion rod is elastically connected to the storage chamber, the end of the extrusion rod away from the conveying path slides into the through hole, and the end of the extrusion rod close to the conveying path is slidably adapted to the conveying path.

[0014] As a further solution of the present invention: a collecting groove is arranged at the bottom of the notch, a concentrating groove is arranged in the side wall of the disc, and a drainage port is arranged between the concentrating groove and the collecting groove.

[0015] As a further solution of the present invention: a delivery pipe is arranged between the delivery path and the centralizing tank, the top of the delivery pipe is connected to the delivery path, and the bottom of the delivery pipe extends to the bottom of the centralizing tank.

[0016] As a further solution of the present invention: a tooth groove is provided on the side of the rotating ring close to the drainage port, a transmission assembly is installed in the side wall of the disc, a rotating shaft is provided at the output end of the transmission assembly, a gear meshing with the tooth groove is provided at the end of the rotating shaft away from the transmission assembly, a traction rope is provided between the transmission assembly and the positioning hole, and the end of the traction rope away from the transmission assembly is fixedly connected to the positioning hole.

[0017] Compared with the prior art, the beneficial effect of the present invention is that when in use, when the positioning column moves to cooperate with the trigger component, the driving component moves toward the movable mold through the action of the trigger component, and then acts on the positioning plate to move toward the positioning hole, thereby realizing the adaptation of the positioning plate to the inner wall of the positioning hole, avoiding the positioning column and the positioning hole being in long-term frictional contact, so that the positioning column no longer adapts to the positioning hole, that is, there is a gap between the positioning column and the positioning hole, which causes the movable mold and the fixed mold to be offset or shaken when they are adapted in subsequent use, affecting the plastic injection molding work. Through the cooperation of the driving component and the positioning plate, the positioning plate can automatically move out of the positioning column according to the gap between the positioning column and the positioning hole to adapt to the positioning hole, thereby ensuring the stability between the movable mold and the fixed mold, and no manual adjustment is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle.

[0020] Figure 3 It is a structural schematic diagram of a cross-section of the middle portion of the positioning column in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the positioning plate in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the disc in the present invention.

[0023] Figure 6 It is a structural schematic diagram of a cross-section of the middle portion of the positioning hole in the present invention.

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at B in the figure.

[0025] Figure 8Schematic diagram of the structure of the buckle plate in the present invention.

[0026] Figure 9 For the present invention Figure 8 Schematic diagram of the structure at position C in the present invention.

[0027] Figure 10 Schematic diagram of the structure of the gear in the present invention.

[0028] In the figure: 1, moving mold; 2, fixed mold; 3, positioning column; 4, positioning plate; 5, triggering component; 6, sleeve; 7, inner rod; 8, disc; 9, wiping cotton; 10, swivel ring; 11, positioning hole; 12, chute; 13, limiting rod; 14, limiting hole; 15, conical platform; 16, collecting groove; 17, drainage port; 18, buckle plate; 19, extension plate; 20, traction rope; 21, mating groove; 22, storage cavity; 23, extrusion rod; 24, conveying channel; 25, conveying pipe; 26, centralized groove; 27, relief opening; 28, tooth groove; 29, transmission component; 30, rotating shaft; 31, gear. Specific embodiments

[0029] Please refer to Figures 1 - 10 , in the embodiment of the present invention, a high-precision positioning device for a plastic mold includes a moving mold 1 and a fixed mold 2. A positioning hole 11 is provided at one end of the fixed mold 2 opposite to the moving mold 1. A positioning column 3 that is slidably adapted to the positioning hole 11 is provided at one end of the moving mold 1 opposite to the fixed mold 2. A triggering component 5 is provided in the positioning hole 11. Positioning plates 4 are arranged in a circular array along the center on the positioning column 3. A driving component is provided at the center of the positioning column 3. The driving component is slidably matched with the positioning plate 4. When the driving component moves towards the moving mold 1 in the positioning column 3, the driving component causes the positioning plate 4 to move towards the periphery of the positioning column 3.

[0030] Preferably, the positioning holes 11 are provided at the four corners of one end of the fixed mold 2 opposite to the moving mold 1, that is, four groups of positioning holes 11 are provided. Correspondingly, the positioning columns 3 are provided at the four corners of one end of the moving mold 1 opposite to the fixed mold 2, and the positioning columns 3 are respectively slidably adapted to the positioning holes 11. The moving mold 1 and the fixed mold 2 are both prior arts, and the related structures and working principles will not be described in detail herein.

[0031] When in use, after the movable mold 1 moves toward the fixed mold 2 and fits in, plastic molding can be performed. During this process, the movable mold 1 moves toward the fixed mold 2 so that the positioning column 3 moves toward the positioning hole 11. When the positioning column 3 moves and cooperates with the trigger component 5, the driving component moves toward the movable mold 1 through the action of the trigger component 5. At this time, the positioning plate 4 moves into the positioning hole 11, so that when the driving component moves upward, the driving component acts on the positioning plate 4 to move toward the positioning hole 11, thereby achieving the adaptation of the positioning plate 4 to the inner wall of the positioning hole 11, thereby avoiding the positioning column 3 and the positioning hole 11. Due to long-term friction contact, the positioning column 3 no longer fits the positioning hole 11, that is, there is a gap between the positioning column 3 and the positioning hole 11, which causes the movable mold 1 and the fixed mold 2 to deviate or shake when they are adapted during subsequent use, affecting the plastic injection molding work. Through the cooperation of the driving component and the positioning plate 4, the positioning plate 4 can automatically move out of the positioning column 3 to fit the positioning hole 11 according to the gap between the positioning column 3 and the positioning hole 11, thereby ensuring the stability between the movable mold 1 and the fixed mold 2 without manual adjustment.

[0032] See also Figures 1 - 4 Preferably, the driving assembly includes a sleeve 6; the sleeve 6 is slidably arranged at the center of the positioning column 3, and the end of the sleeve 6 away from the movable mold 1 slides through the bottom side wall of the positioning column 3, and the outer side wall of the sleeve 6 close to the fixed mold 2 is fixedly provided with a conical platform 15, and the conical platform 15 is arranged in the positioning column 3, and the positioning plate 4 is arranged in a fan-shaped block structure, and the end of the positioning plate 4 close to the fixed mold 2 is provided with an inclined surface that slides with the conical platform 15, and the positioning plate 4 is elastically connected to the side wall of the positioning column 3. When used specifically, in the initial state where the movable mold 1 and the fixed mold 2 are away from each other, the end of the sleeve 6 close to the fixed mold 2 protrudes from the end of the positioning column 3 close to the fixed mold 2, and the positioning plate 4 is flush with the outer side wall of the positioning column 3 under the corresponding elastic action, and the conical platform 1 5 is located at one end of the positioning column 3 close to the fixed mold 2, and the trigger component 5 is located at one end of the positioning hole 11 close to the movable mold 1. When the movable mold 1 moves to fit toward the fixed mold 2, during this process, the sleeve 6 will contact the trigger component 5, and as the movable mold 1 continues to move, the sleeve 6 will move toward the movable mold 1 under the resistance of the trigger component 5. When the sleeve 6 moves, it will drive the conical platform 15 to move, so that the positioning plate 4 is prompted to move toward the inner wall of the positioning hole 11 and fit through the sliding matching surface of the conical platform 15 and the positioning plate 4, thereby avoiding the shaking problem caused by the large gap between the positioning column 3 and the positioning hole 11 when the positioning column 3 continues to move into the positioning hole 11, and avoiding the deviation problem when the movable mold 1 and the fixed mold 2 are fitted.

[0033] In order to keep the positioning plate 4 in a locked state when it is adapted to the positioning hole 11, so as to avoid the problem of possible movement and reset of the positioning plate 4 during plastic molding after the moving mold 1 and the fixed mold 2 are adapted. Preferably, an inner rod 7 is slidably arranged in the sleeve 6. One end of the inner rod 7 close to the moving mold 1 is fixedly connected with a connecting plate. One end of the connecting plate away from the inner rod 7 is fixedly provided with a limiting rod 13. The limiting rod 13 is arranged on the side of the connecting plate close to the positioning plate 4. A plurality of limiting holes 14 that are slidably matched with the limiting rod 13 are arranged in an array at one end of the positioning plate 4 close to the moving mold 1. A plurality of groups of the limiting holes 14 are horizontally arranged in a row at one end of the positioning plate 4. A chute 12 is arranged inside the side wall of the positioning column 3. The limiting rod 13 is slidably arranged in the chute 12, and one end of the connecting plate away from the inner rod 7 is in sliding fit with the chute 12. A spring is arranged between the top end of the inner rod 7 and the inner wall of the positioning column 3. During actual use, the number of the connecting plate, the limiting rod 13, the chute 12 and the positioning plate 4 is set in one-to-one correspondence. The length of the inner rod 7 is greater than the length of the sleeve 6. In the initial state when the moving mold 1 and the fixed mold 2 are relatively far away from each other, under the action of the corresponding spring, the end of the inner rod 7 away from the moving mold 1 protrudes from the end of the sleeve 6, and the limiting rod 13 is adapted to the limiting hole 14. At this time, the position of the positioning plate 4 is limited. When the moving mold 1 moves towards the fixed mold 2, the inner rod 7 will first contact the trigger assembly 5 and move towards the sleeve 6 under the action of the trigger assembly 5. At this time, the movement of the inner rod 7 promotes the limiting rod 13 to move towards the moving mold 1 through the connecting plate and separate from the limiting hole 14. At this time, the limit of the positioning plate 4 is released. Subsequently, when the sleeve 6 contacts and cooperates with the trigger assembly 5, the sleeve 6 moves towards the moving mold 1 to promote the positioning plate 4 to move towards the positioning hole 11 and fit with the positioning hole 11. After the positioning plate 4 fits with the positioning hole 11, the moving mold 1 continues to move to push the trigger assembly 5 into the positioning hole 11 through the sleeve 6. After the moving mold 1 and the fixed mold 2 are adapted, the trigger assembly 5 is disengaged from the sliding fit with the inner rod 7. Thus, the inner rod 7 moves and resets under the action of the corresponding spring, and further the limiting rod 13 moves and resets to be adapted to the corresponding limiting hole 14, so as to limit the moved positioning plate 4, realizing the stability of the moving mold 1 and the fixed mold 2 during plastic molding when the moving mold 1 and the fixed mold 2 are adapted.

[0034] Please refer to Figures 1 - 2 、 Figures 5 - 9 Figure, preferably, the trigger assembly 5 includes a disc 8; the disc 8 is slidably arranged in the positioning hole 11. A spring is arranged between one end of the disc 8 away from the moving mold 1 and the positioning hole 11. A through hole that is slidably adapted to the sleeve 6 is arranged at the center of the disc 8. Two buckle plates 18 are symmetrically arranged along the center and slidably arranged at one end of the disc 8 away from the moving mold 1. An extension plate 19 is elastically connected inside the side wall of the disc 8. One end of the extension plate 19 close to the through hole is fixedly connected with the buckle plate 18. A relief opening 27 for the buckle plate 18 to slide is arranged at one end of the disc 8 away from the moving mold 1. Two mating grooves 21 that are slidably adapted to the extension plate 19 are symmetrically arranged along the center on the inner wall of the positioning hole 11 away from the moving mold 1.

[0035] In actual use, the buckling plate 18 is arranged in an "L" shape, and two groups of buckling plates 18 are arranged on the periphery of the through hole. The disc 8 is slidably matched with the positioning hole 11. The fitting groove 21 is arranged in a vertical arc shape, and the fitting groove 21 is arranged at the position after the disc 8 moves to the maximum distance away from the moving die 1. Moreover, the dimension range of the fitting groove 21 is larger than the position range of the maximum moving distance of the disc 8, so as to ensure that the extension plate 19 can be better fitted with the fitting groove 21. In the initial state, the disc 8 is at the opening position of the end close to the moving die 1 in the positioning hole 11 under the action of the corresponding spring, and there is a gap between the end of the disc 8 close to the moving die 1 and the opening of the end of the positioning hole 11 close to the moving die 1. The length of the gap is larger than the distance between the end of the positioning plate 4 and the end of the positioning column 3 away from the moving die 1. The through hole corresponds to the sleeve 6. The extension plate 19 is retracted in the side wall of the disc 8. The two groups of buckling plates 18 are in a relatively close position, and the interval between the opposite ends of the two groups of buckling plates 18 is smaller than the diameter of the inner rod 7. When the moving die 1 moves towards the fixed die 2, the inner rod 7 first passes through the through hole and contacts the buckling plate 18. Subsequently, the inner rod 7 moves relatively towards the moving die 1 under the blocking action of the buckling plate 18. When the inner rod 7 moves to be flush with the end of the sleeve 6, that is, the end of the sleeve 6 contacts and cooperates with the buckling plate 18. At this time, the movement of the inner rod 7 causes the limit rod 13 to move and separate from the limit hole 14. And the end of the positioning plate 4 away from the moving die 1 is at this time in the positioning hole 11, and there is a gap between the positioning column 3 and the disc 8. In this way, when the moving die 1 continues to move, it will cause the sleeve 6 to move towards the moving die 1 under the action of the buckling plate 18, and then promote the positioning plate 4 to move towards and fit with the inner wall of the positioning hole 11 through the tapered platform 15. When the positioning plate 4 fits with the positioning hole 11, the position of the positioning plate 4 is restricted by the positioning hole 11, and then the tapered platform 15 can no longer move. Therefore, the continuous movement of the moving die 1 will cause the disc 8 to move away from the moving die 1 through the cooperation of the sleeve 6 and the buckling plate 18. When the moving die 1 and the fixed die 2 are in contact, at this time, the disc 8 moves to the maximum distance relative to the direction away from the moving die 1 in the positioning hole 11. At this time, the extension plate 19 corresponds to the position of the fitting groove 21. Subsequently, the extension plate 19 moves out of the side wall of the disc 8 towards the fitting groove 21 under the action of the corresponding elasticity, and then the two groups of buckling plates 18 move relatively away from each other. The distance after the two groups of buckling plates 18 move is larger than the size of the inner rod 7. So the inner rod 7 will move downward to reset under the action of the elasticity, and then the limit rod 13 moves again to be adapted to the corresponding limit hole 14, so as to limit the position of the positioning plate 4 and avoid the problem of shaking and deviation of the positioning plate 4 during the plastic molding of the moving die 1 and the fixed die 2. When the moving die 1 and the fixed die 2 move and separate, the moving die 1 drives the positioning column 3 to move and separate from the positioning hole 11. Subsequently, the disc 8 moves and resets under the action of the corresponding spring. And during the separation process of the positioning column 3 and the positioning hole 11, the limit rod 13 remains adapted to the limit hole 14, so as to keep the positioning plate 4 and the positioning hole 11 in continuous contact, thus ensuring the stability at the initial stage of the separation of the moving die 1 and the fixed die 2.

[0036] Please refer to Figure 5 and Figures 7 - 8 Preferably, a notch is provided on the outer periphery of one end of the disc 8 close to the moving die 1. The notch is arranged in an annular structure. A rotating ring 10 is arranged in the notch. The rotating ring 10 is rotatably connected to the side wall of the disc 8. A wiping cotton 9 is fixedly arranged on the outer periphery of the rotating ring 10 close to the positioning hole 11. The wiping cotton 9 is slidably attached to the inner wall of the positioning hole 11. An annular through-port is arranged at the center of the rotating ring 10. Storage cavities 22 are symmetrically arranged along the center of the inner edge of the side wall of the disc 8. A conveying channel 24 is arranged between the storage cavity 22 and the annular through-port. One end of the conveying channel 24 far from the annular through-port communicates with one side of the end of the storage cavity 22 far from the moving die 1, and one end of the conveying channel 24 far from the storage cavity 22 communicates with the annular through-port correspondingly. A pressing rod 23 is hermetically and slidably connected to the end of the storage cavity 22 far from the moving die 1, and the pressing rod 23 is elastically connected to the storage cavity 22 through a spring. One end of the pressing rod 23 far from the conveying channel 24 slides into the through-hole, and one end of the pressing rod 23 close to the conveying channel 24 is slidably adapted to the conveying channel 24.

[0037] During actual use, a slope facing the sleeve 6 is provided at one end of the pressing rod 23 extending into the through-hole. A lubricating liquid for lubricating between the positioning hole 11 and the positioning post 3 and the positioning plate 4 is arranged in the storage cavity 22. In this way, the lubricating liquid in the storage cavity 22 can be conveyed to the annular through-port through the conveying channel 24, and then conveyed to the wiping cotton 9 through the annular through-port, so that the wiping cotton 9 fully absorbs the lubricating liquid. Then, the wiping cotton 9 slides in the positioning hole 11 to lubricate the inner wall of the positioning hole 11, thus avoiding poor lubrication when the positioning post 3 and the positioning plate 4 slide and fit in the positioning hole 11, reducing the wear of the positioning post 3, and extending its service life. And the setting of the wiping cotton 9 avoids that too much lubricating liquid is added at one time and will flow to the end of the positioning hole 11 to cause accumulation, so that the inner wall of the positioning hole 11 cannot be lubricated.

[0038] Since the side wall of the disc 8 is in close sliding fit with the inner wall of the positioning hole 11, in order to prevent the lubricating fluid from flowing to and accumulating at the inner wall of the end of the positioning hole 11 away from the moving mold 1, resulting in waste, preferably, a collecting groove 16 is provided at the bottom of the notch. In this way, when there is too much lubricating fluid on the inner wall of the positioning hole 11, the excess lubricating fluid will be scraped into the collecting groove 16 under the action of the movement of the disc 8, avoiding waste of the lubricating fluid. A concentrating groove 26 is provided inside the side wall of the disc 8. The concentrating groove 26 is arranged vertically and is arranged below the conveying channel 24. The bottom of the concentrating groove 26 is arranged in a semi-circular structure. A conveying pipe 25 is provided between the conveying channel 24 and the concentrating groove 26. The top of the conveying pipe 25 is communicated with the conveying channel 24, and the bottom of the conveying pipe 25 extends into the semi-circular structure at the bottom of the concentrating groove 26. In this way, the lubricating fluid accumulated in the concentrating groove 26 can be better extracted. A drainage port 17 is provided between the concentrating groove 26 and the collecting groove 16. The drainage port 17 is arranged in an inclined structure. In this way, the lubricating fluid in the collecting groove 16 can flow into the concentrating groove 26 through the drainage port 17.

[0039] Please refer to Figure 10 , a tooth groove 28 is provided on the side wall of the swivel ring 10 close to the drainage port 17. A transmission component 29 is installed inside the side wall of the disc 8. The output end of the transmission component 29 is provided with a transmission shaft 30 in a transmission manner. A gear 31 meshing with the tooth groove 28 is provided at one end of the transmission shaft 30 away from the transmission component 29. A traction rope 20 is provided between the transmission component 29 and the positioning hole 11. One end of the traction rope 20 away from the transmission component 29 is fixedly connected to the positioning hole 11. The transmission component 29 can be a common spring structure or a coil spring structure in the prior art. The detailed related structure and working principle will not be described in detail here. One end of the transmission shaft 30 away from the gear 31 extends into the transmission component 29 and is connected to the spring or coil spring structure. One end of the traction rope 20 located inside the transmission component 29 is wound around the transmission shaft 30. In this way, when the traction rope 20 is pulled towards the periphery of the transmission component 29, the transmission shaft 30 rotates, thereby causing the corresponding spring or coil spring structure to store energy. On the contrary, when the pulling force on the traction rope 20 is released, the transmission shaft 30 rotates and resets under the action of the spring or coil spring.

[0040] During specific use, a first one-way valve is fixedly arranged inside one end of the conveying channel 24 close to the rotating ring 10, and a second one-way valve is fixedly arranged inside one end of the conveying pipe 25 close to the conveying channel 24. Only one of the first one-way valve and the second one-way valve is in an open state at the same moment. In the initial state when the moving mold 1 and the fixed mold 2 are separated, the extrusion rod 23 extends into the through hole from one end far away from the conveying channel 24 under the action of the corresponding spring, and the end of the extrusion rod 23 close to the conveying channel 24 is separated from the conveying channel 24. At this time, the conveying channel 24 is communicated with the storage cavity 22, so that the lubricating liquid in the storage cavity 22 can flow into the conveying channel 24. The disc 8 is located at a position close to the moving mold 1 inside the positioning hole 11, and the traction rope 20 is pulled out from the transmission assembly 29 to the maximum and is in a taut state. When the moving mold 1 moves closer to and fits with the fixed mold 2, during this process, the sleeve 6 first extends into the through hole and is slidably matched with the extrusion rod 23, and then the extrusion rod 23 is pushed towards the conveying channel 24, so that the end of the extrusion rod 23 far away from the sleeve 6 moves into the conveying channel 24, thereby squeezing the lubricating liquid inside one end of the conveying channel 24 close to the storage cavity 22 towards the rotating ring 10. At this time, the first one-way valve inside the conveying channel 24 will open, allowing the lubricating liquid inside the conveying channel 24 to enter the annular through port. Subsequently, the sleeve 6 cooperates with the buckle 18 to push the disc 8 by the sleeve 6. At this time, the traction rope 20 will become slack, and then the spring or torsion spring inside the transmission assembly 29 is no longer restricted, thereby driving the rotating shaft 30 to rotate. The rotation of the rotating shaft 30 drives the gear 31 to rotate. The rotation of the gear 31 causes the rotating ring 10 to rotate through the tooth grooves 28. The rotation of the rotating ring 10 causes the lubricating liquid inside the annular through port to move towards the wiping cotton 9 due to the centrifugal force, so that the wiping cotton 9 can fully absorb it. Subsequently, the rotation of the rotating ring 10 causes the wiping cotton 9 to rotate while moving in the direction away from the moving mold 1 along with the disc 8, achieving the purpose of uniformly wiping the lubricating liquid on the inner wall of the positioning hole 11, and avoiding the wear problem caused by large friction when the positioning post 3 or the positioning plate 4 is slidably matched with the positioning hole 11. When the moving mold 1 and the fixed mold 2 are separated, first, the sleeve 6 is separated from the through hole, so that the extrusion rod 23 moves back to its original position under the action of the corresponding spring. During the process of the extrusion rod 23 moving back to its original position, since the first one-way valve inside the conveying channel 24 is in a closed state, negative pressure is generated inside the conveying channel 24. At this time, the second one-way valve inside the conveying pipe 25 opens. Along with the movement of the extrusion rod 23 back to its original position and the arrangement of the conveying pipe 25, the lubricating liquid in the centralized groove 26 is pumped back into the conveying channel 24 to form a recycling. When the disc 8 moves back to its original position, the traction rope 20 is pulled out from the transmission assembly 29 again, causing the rotating shaft 30 to rotate to recharge the corresponding spring or torsion spring for the next use.

Claims

1. A high-precision positioning device for a plastic mold, comprising a moving mold and a fixed mold. A positioning hole is provided at one end of the fixed mold opposite to the moving mold, and a positioning post slidably and adaptively corresponding to the positioning hole is provided at one end of the moving mold opposite to the fixed mold; characterized in that, A trigger assembly is arranged in the positioning hole, a positioning plate is arranged in a circular array along the center of the positioning column, a driving assembly is arranged in the center of the positioning column, the driving assembly is slidably matched with the positioning plate, and when the driving assembly moves toward the movable mold in the positioning column, the driving assembly prompts the positioning plate to move toward the periphery of the positioning column; The driving assembly includes a sleeve; the sleeve is slidably arranged at the center of the positioning column, and the end of the sleeve away from the movable mold slides through the bottom side wall of the positioning column, the outer side wall of the sleeve close to the fixed mold is fixedly provided with a conical platform, the conical platform is arranged in the positioning column, and the end of the positioning plate close to the fixed mold is provided with an inclined surface that is slidably fitted with the conical platform, and the positioning plate is elastically connected to the side wall of the positioning column; An inner rod is slidably arranged in the sleeve, an end of the inner rod close to the movable mold is fixedly connected to a connecting plate, an end of the connecting plate away from the inner rod is fixedly arranged with a limiting rod, the limiting rod is arranged on a side of the connecting plate close to the positioning plate, an end of the positioning plate close to the movable mold is arrayed with limiting holes slidably matched with the limiting rod, a sliding groove is arranged in the side wall of the positioning column, and the limiting rod is slidably arranged in the sliding groove; the trigger assembly includes a disc; The disc is slidably arranged in the positioning hole, a spring is arranged between the end of the disc away from the movable mold and the positioning hole, a through hole is arranged in the center of the disc to be slidably adapted to the sleeve, a buckle plate is slidably arranged along the center at the end of the disc away from the movable mold, an extension plate is elastically connected to the side wall of the disc, and the end of the extension plate close to the through hole is fixedly connected to the buckle plate, a yielding opening for the buckle plate to slide is arranged at the end of the disc away from the movable mold, and a matching groove slidably adapted to the extension plate is symmetrically arranged along the center on the inner wall of the positioning hole away from the movable mold.

2. The high-precision positioning device for a plastic mold according to claim 1, wherein, A notch is arranged on the periphery of one end of the disc close to the movable mold, a swiping ring is arranged in the notch, the swiping ring is rotatably connected to the side wall of the disc, a wiping cotton is fixedly arranged on the periphery of the swiping ring close to the positioning hole, the wiping cotton is slidably fitted with the inner wall of the positioning hole, an annular opening is arranged at the center of the swiping ring, a storage cavity is symmetrically arranged along the center of the side wall of the disc, a conveying path is arranged between the storage cavity and the annular opening, one end of the conveying path away from the annular opening is connected to the storage cavity, and one end of the conveying path away from the storage cavity is correspondingly connected to the annular opening.

3. The high-precision positioning device for a plastic mold according to claim 2, wherein An end of the storage cavity away from the movable mold is sealed and slidably connected with an extrusion rod, and the extrusion rod is elastically connected to the storage cavity. The end of the extrusion rod away from the conveying path slides into the through hole, and the end of the extrusion rod close to the conveying path is slidably adapted to the conveying path.

4. A high-precision positioning device for a plastic mold according to claim 2, characterized in that, A collecting groove is arranged at the bottom of the notch, a concentrating groove is arranged inside the side wall of the disc, and a drainage port is arranged between the concentrating groove and the collecting groove.

5. A high-precision positioning device for a plastic mold according to claim 4, characterized in that, A conveying pipe is arranged between the conveying path and the centralizing tank, the top of the conveying pipe is communicated with the conveying path, and the bottom of the conveying pipe extends to the bottom of the centralizing tank.

6. The high-precision positioning device for a plastic mold according to claim 2, wherein, A toothed groove is provided on one side of the swivel ring close to the drainage port. A transmission component is installed inside the side wall of the disc. The output end of the transmission component is drivingly provided with a rotating shaft. A gear meshing with the toothed groove is provided at one end of the rotating shaft away from the transmission component. A towing rope is provided between the transmission component and the positioning hole. One end of the towing rope away from the transmission component is fixedly connected to the positioning hole.

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