High-precision positioning device for plastic mold

Abstract

The high-precision positioning device comprises a movable mold and a fixed mold, a positioning hole is formed in the end, opposite to the movable mold, of the fixed mold, and a positioning column correspondingly matched with the positioning hole in a sliding mode is arranged at the end, opposite to the fixed mold, of the movable mold; a positioning hole is formed in the positioning column, a trigger assembly is arranged in the positioning hole, positioning plates are arranged on the positioning column along the center in an annular array mode, a driving assembly is arranged in the center in the positioning column, and the driving assembly is in sliding fit with the positioning plates. And then the positioning plate is acted to move towards the positioning hole, so that the positioning plate is matched with the inner wall of the positioning hole, and the positioning plate can automatically move to extend out of the positioning column to be matched with the positioning hole according to the gap between the positioning column and the positioning hole, so that the stability between the movable mold and the fixed mold is ensured, and manual adjustment work is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of plastic moulds, in particular to a high-precision positioning device for plastic moulds. Background Art

[0002] Plastic molds are important tools for producing plastic products and are widely used in many industries such as automobiles, electronics, home appliances, medical care, and packaging. During the use of plastic molds, positioning devices are required to ensure the precise fit between the movable mold and the fixed mold, thereby improving the quality of plastic molding.

[0003] Chinese Patent Publication No.: CN213648487U discloses a portable positioning device for a plastic mold, including a bottom mold and a top mold, wherein positioning grooves are respectively provided in the walls around the top of the bottom mold, a sealing ring is provided on the outer wall of the corresponding positioning groove on the top wall of the bottom mold, a groove is also provided 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 protrusion is provided on the wall at the middle position of the bottom of the fixing plate, and positioning mechanisms are respectively provided in the mounting grooves in the walls around the bottom of the fixing plate.

[0004] Although the above-mentioned device can adjust the gap between the positioning column and the positioning groove through the gasket, in actual use, when the gap between the positioning column and the positioning groove needs to be adjusted through the gasket, it is necessary to first stop the machine and then unscrew the positioning column, and then turn the knob cover and other components to adjust the gasket. The operation is relatively cumbersome, and the adjusted gasket cannot be adjusted in real time according to the gap between the positioning groove and the positioning column, which has certain limitations.

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

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

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision positioning device for a plastic mold, comprising a movable mold and a fixed mold, wherein a positioning hole is provided at one end of the fixed mold relative to the movable mold, and a positioning column slidably adapted to the positioning hole is provided at one end of the movable mold relative to the fixed mold; a trigger assembly is provided in the positioning hole, a positioning plate is provided in a circular array along the center of the upper edge of the positioning column, a driving assembly is provided 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.

[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 8It is a structural schematic diagram of the gusset plate in the present invention.

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

[0027] Fig.10 It is a schematic diagram of the structure of the gear in the present invention.

[0028] In the figure: 1. movable mold; 2. fixed mold; 3. positioning column; 4. positioning plate; 5. trigger assembly; 6. sleeve; 7. inner rod; 8. disc; 9. wiping cotton; 10. swivel; 11. positioning hole; 12. slide groove; 13. limit rod; 14. limit hole; 15. conical platform; 16. collecting trough; 17. drainage port; 18. buckle plate; 19. extension plate; 20. traction rope; 21. matching groove; 22. storage chamber; 23. extrusion rod; 24. conveying path; 25. conveying pipe; 26. central groove; 27. give way; 28. tooth groove; 29. ​​transmission assembly; 30. rotating shaft; 31. gear. DETAILED DESCRIPTION

[0029] See also Figure 1-Figure 10 In an embodiment of the present invention, a high-precision positioning device for a plastic mold includes a movable mold 1 and a fixed mold 2. A positioning hole 11 is provided at one end of the fixed mold 2 relative to the movable mold 1. A positioning column 3 slidably matched with the positioning hole 11 is provided at one end of the movable mold 1 relative to the fixed mold 2. A trigger component 5 is provided in the positioning hole 11. A positioning plate 4 is provided in a ring array along the center of the upper edge of the positioning column 3. A driving component is provided in the center of the positioning column 3. The driving component slidably matches with the positioning plate 4. When the driving component moves toward the movable mold 1 in the positioning column 3, the driving component prompts the positioning plate 4 to move toward the periphery of the positioning column 3.

[0030] Preferably, the positioning holes 11 are arranged at the four corners of one end of the fixed mold 2 relative to the movable mold 1, that is, four groups of positioning holes 11 are arranged, and the corresponding positioning columns 3 are arranged at the four corners of one end of the movable mold 1 relative to the fixed mold 2, and the positioning columns 3 are respectively matched with the positioning holes 11. The movable mold 1 and the fixed mold 2 are both existing technologies, and the relevant structures and working principles will not be described in detail here.

[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 Figure 1-Figure 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 matched with the positioning hole 11, thereby avoiding the problem of movement and reset of the positioning plate 4 when the movable mold 1 and the fixed mold 2 are matched for plastic molding, preferably, an inner rod 7 is slidably arranged in the sleeve 6, and the end of the inner rod 7 close to the movable mold 1 is fixedly connected to a connecting plate, and the end of the connecting plate away from the inner rod 7 is fixedly provided with a limiting rod 13, and the limiting rod 13 is arranged on a side of the connecting plate close to the positioning plate 4, and an array of limiting holes 14 that slide with the limiting rod 13 are arranged on the end of the positioning plate 4 close to the movable mold 1. A plurality of groups of holes 14 are arranged horizontally in a row at one end of the positioning plate 4, a slide groove 12 is arranged in the side wall of the positioning column 3, a limiting rod 13 is slidably arranged in the slide groove 12, and an end of the connecting plate away from the inner rod 7 is slidably fitted with the slide groove 12, a spring is arranged between the top of the inner rod 7 and the inner wall of the positioning column 3, in actual use, the number of the connecting plate, the limiting rod 13, the slide groove 12 and the positioning plate 4 is arranged one by one, the length of the inner rod 7 is greater than the length of the sleeve 6, and in the initial state where the movable mold 1 and the fixed mold 2 are relatively far apart, the inner rod 7 is under the action of the corresponding spring , the end of the inner rod 7 away from the movable 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 movable mold 1 moves toward the fixed mold 2, the inner rod 7 will first contact the trigger component 5 and move toward the sleeve 6 under the action of the trigger component 5. At this time, the inner rod 7 moves through the connecting plate to prompt the limiting rod 13 to move toward the movable mold 1 and separate from the limiting hole 14. At this time, the limiting of the positioning plate 4 is released. Subsequently, when the sleeve 6 contacts and cooperates with the trigger component 5, the sleeve 6 moves toward the movable mold 1 to prompt the positioning plate 4 to move toward the positioning hole 1 1 moves and fits with the positioning hole 11. When the positioning plate 4 fits with the positioning hole 11, the movable mold 1 continues to move through the sleeve 6 to push the trigger assembly 5 to move into the positioning hole 11. When the movable mold 1 and the fixed mold 2 are adapted, the trigger assembly 5 and the inner rod 7 are released from sliding adaptation, so that the inner rod 7 moves and resets under the action of the corresponding spring, and then the limiting rod 13 moves and resets to fit with the corresponding limiting hole 14, so that the moved positioning plate 4 is limited, so that the stability of the movable mold 1 and the fixed mold 2 is maintained when the movable mold 1 and the fixed mold 2 are adapted for plastic molding.

[0034] See also Figure 1-Figure 2 , Figure 5-Figure 9 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 the end of the disc 8 away from the movable mold 1 and the positioning hole 11, a through hole slidably matched with the sleeve 6 is arranged at the center of the disc 8, a buckle plate 18 is slidably arranged along the center at the end of the disc 8 away from the movable mold 1, an extension plate 19 is elastically connected to the side wall of the disc 8, and an end of the extension plate 19 close to the through hole is fixedly connected to the buckle plate 18, a clearance opening 27 for sliding of the buckle plate 18 is arranged at the end of the disc 8 away from the movable mold 1, and a matching groove 21 slidably matched with the extension plate 19 is symmetrically arranged along the center on the inner wall of the positioning hole 11 away from the movable mold 1.

[0035] In actual use, the buckle plate 18 is set in an "L"-shaped structure, and two groups of buckle plates 18 are set on the periphery of the through hole, the disc 8 is slidably adapted to the positioning hole 11, the matching groove 21 is a vertical arc-shaped structure, and the matching groove 21 is set at the position after the disc 8 moves away from the movable mold 1 to a maximum distance, and the size range of the matching groove 21 is larger than the position range of the maximum moving distance of the disc 8, thereby ensuring that the extension plate 19 can better adapt to the matching groove 21; in the initial state, the disc 8 is in the end opening position close to the movable mold 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 movable mold 1 and the end opening of the positioning hole 11 close to the movable mold 1, and the length of the gap is greater than the distance between the positioning plate 4 and the positioning column 3 away from the movable mold 1. The distance between one end and the other end of the through hole corresponds to the sleeve 6, the extension plate 19 shrinks in the side wall of the disc 8, the two groups of buckle plates 18 are in a relatively close position, and the interval between the opposite ends of the two groups of buckle plates 18 is smaller than the diameter of the inner rod 7. When the movable mold 1 moves toward the fixed mold 2, the inner rod 7 first passes through the through hole and contacts the buckle plate 18, and then the inner rod 7 moves relatively toward the movable mold 1 under the blocking action of the buckle 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 buckle plate 18, 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 movable mold 1 is now in the positioning hole 11, and there is a gap between the positioning column 3 and the disc 8, so that when the movable mold 1 continues to move, it will make The sleeve 6 moves toward the movable mold 1 under the action of the buckle plate 18, and then the positioning plate 4 is urged to move toward and fit the inner wall of the positioning hole 11 through the conical platform 15. When the positioning plate 4 fits with the positioning hole 11, the position of the positioning plate 4 is limited by the positioning hole 11, so that the conical platform 15 can no longer move. Therefore, the continuous movement of the movable mold 1 will cause the disc 8 to move away from the movable mold 1 through the cooperation of the sleeve 6 and the buckle plate 18. When the movable mold 1 and the fixed mold 2 fit together, the disc 8 moves to the maximum distance in the positioning hole 11 in the direction away from the movable mold 1. At this time, the extension plate 19 corresponds to the position of the matching groove 21. Subsequently, the extension plate 19 moves toward the matching groove 21 under the corresponding elastic action and extends out of the side wall of the disc 8, so that the two sets of buckle plates 18 are relatively The inner rod 7 moves away from the movable mold 1 and the distance after the two sets of buckle plates 18 move is greater than the size of the inner rod 7, so the inner rod 7 will move downward and reset under the action of elasticity, and then the limiting rod 13 will move again to adapt to the corresponding limiting hole 14, thereby limiting the position of the positioning plate 4 to avoid the problem of shaking and offset of the positioning plate 4 when the movable mold 1 and the fixed mold 2 are plastic molding; when the movable mold 1 and the fixed mold 2 move and separate, the movable mold 1 drives the positioning column 3 to move and separate from the positioning hole 11, and then the disc 8 moves and resets under the action of the corresponding spring, and in the process of separation of the positioning column 3 and the positioning hole 11, the limiting rod 13 and the limiting hole 14 remain adapted, so that the positioning plate 4 and the positioning hole 11 continue to fit, thereby ensuring the stability of the movable mold 1 and the fixed mold 2 in the initial stage of separation.

[0036] See also Figure 5 , Figure 7-Figure 8 Preferably, a notch is provided on the periphery of one end of the disc 8 close to the movable mold 1, the notch is provided with an annular structure, a rotating ring 10 is provided in the notch, the rotating ring 10 is rotatably connected with the side wall of the disc 8, a wiping cotton 9 is fixedly provided on the periphery of the rotating ring 10 close to the positioning hole 11, the wiping cotton 9 is slidably fitted with the inner wall of the positioning hole 11, an annular opening is provided at the center of the rotating ring 10, a storage cavity 22 is symmetrically provided along the center of the side wall of the disc 8, and a conveying path 24 is provided between the storage cavity 22 and the annular opening One end of the conveying path 24 away from the annular passage is connected to the end of the storage chamber 22 away from the movable mold 1, and the other end of the conveying path 24 away from the storage chamber 22 is correspondingly connected to the annular passage. The end of the storage chamber 22 away from the movable mold 1 is sealed and slidably connected with an extrusion rod 23, and the extrusion rod 23 is elastically connected to the storage chamber 22 through a spring. The end of the extrusion rod 23 away from the conveying path 24 slides into the through hole, and the end of the extrusion rod 23 close to the conveying path 24 is slidably adapted to the conveying path 24.

[0037] In actual use, one end of the extrusion rod 23 extending into the through hole is provided with an inclined surface facing the sleeve 6, and the storage chamber 22 is provided with a lubricating liquid for lubricating the positioning hole 11 and the positioning column 3 and the positioning plate 4. In this way, the lubricating liquid in the storage chamber 22 can be transported to the annular opening through the delivery channel 24, and then transported to the wiping cotton 9 through the annular opening, so that the wiping cotton 9 can fully absorb the lubricating liquid, and then the wiping cotton 9 slides in the positioning hole 11 to lubricate the inner wall of the positioning hole 11, thereby avoiding the positioning column 3 and the positioning plate 4 from maintaining good lubricity when sliding and fitting with the positioning hole 11, reducing the wear of the positioning column 3 and extending its service life. The provision of the wiping cotton 9 avoids the problem of excessive lubricating liquid being added at one time, which will flow to the end of the positioning hole 11 and cause aggregation, thereby failing to lubricate the inner wall of the positioning hole 11.

[0038] Since the side wall of the disc 8 is in close sliding contact with the inner wall of the positioning hole 11, in order to prevent the lubricating liquid from flowing to the inner wall of the positioning hole 11 away from the movable mold 1 and accumulating and causing waste, preferably, a collecting groove 16 is provided at the bottom of the notch, so that when there is too much lubricating liquid on the inner wall of the positioning hole 11, the excess lubricating liquid will be scraped off in the collecting groove 16 under the action of the movement of the disc 8, so as to avoid waste of lubricating liquid. A concentrating groove 26 is provided in the side wall of the disc 8, and the concentrating groove 26 is provided in a vertical state, and the concentrating groove 26 is provided on the conveying path 2 4, the bottom of the centralizing tank 26 is arranged in a semicircular structure, a delivery pipe 25 is arranged between the delivery channel 24 and the centralizing tank 26, the top of the delivery pipe 25 is connected with the delivery channel 24, and the bottom of the delivery pipe 25 extends to the bottom semicircular structure of the centralizing tank 26, so that the lubricating liquid gathered in the centralizing tank 26 can be better extracted, and a drainage port 17 is arranged between the centralizing tank 26 and the collecting tank 16, and the drainage port 17 is arranged in an inclined structure, so that the lubricating liquid in the collecting tank 16 can flow into the centralizing tank 26 through the drainage port 17.

[0039] See also Fig.10 A tooth groove 28 is provided on the side wall of the rotating ring 10 near the drainage port 17, a transmission assembly 29 is installed in the side wall of the disc 8, a rotating shaft 30 is provided at the output end of the transmission assembly 29, a gear 31 meshing with the tooth groove 28 is provided at one end of the rotating shaft 30 away from the transmission assembly 29, a traction rope 20 is provided between the transmission assembly 29 and the positioning hole 11, and one end of the traction rope 20 away from the transmission assembly 29 is fixedly connected to the positioning hole 11, and the transmission assembly 29 can be a common clockwork structure or a coil spring structure in the prior art, The detailed related structure and working principle will not be described in detail here, and the end of the rotating shaft 30 away from the gear 31 extends into the transmission component 29 and is connected to the spring or coil spring structure. The end of the traction rope 20 in the transmission component 29 is wound around the rotating shaft 30, so that when the traction rope 20 is pulled toward the outside of the transmission component 29, the rotating shaft 30 rotates, and then the corresponding spring or coil spring structure accumulates force. Conversely, when the pulling force on the traction rope 20 is released, the rotating shaft 30 rotates and resets under the action of the spring or coil spring.

[0040] When in use, a first one-way valve is fixedly provided in one end of the delivery path 24 close to the rotating ring 10, and a second one-way valve is fixedly provided in one end of the delivery pipe 25 close to the delivery path 24, and only one of the first one-way valve and the second one-way valve is in an open state at the same time; in the initial state in which the movable mold 1 and the fixed mold 2 are separated, the extrusion rod 23 extends into the through hole away from the delivery path 24 under the action of the corresponding spring, and the end of the extrusion rod 23 close to the delivery path 24 is separated from the delivery path 24, at which time the delivery path 24 is connected to the storage chamber 22, so that the lubricating liquid in the storage chamber 22 can flow into the delivery path 24, and the disc 8 is in a position close to the movable mold 1 in the positioning hole 11. The traction rope 20 is pulled out from the transmission assembly 29 to the maximum and is in a taut state; when the movable mold 1 moves close to and fits with the fixed mold 2, during this process, the sleeve 6 first extends into the through hole and slides to fit with the extrusion rod 23, and then pushes the extrusion rod 23 toward the conveying channel 24, so that the end of the extrusion rod 23 away from the sleeve 6 moves into the conveying channel 24, thereby squeezing the lubricating fluid in the end of the conveying channel 24 close to the storage chamber 22 toward the swivel 10, and at this time the first one-way valve in the conveying channel 24 will open, allowing the lubricating fluid in the conveying channel 24 to enter the annular opening, and then the sleeve 6 cooperates with the buckle plate 18 to make the disc 8 pushed by the sleeve 6, and the traction rope 20 will relax. Then, the spring or coil spring in the transmission assembly 29 is no longer constrained, thereby driving the rotating shaft 30 to rotate, and the rotation of the rotating shaft 30 drives the gear 31 to rotate, and the rotation of the gear 31 causes the rotating ring 10 to rotate through the tooth groove 28. When the rotating ring 10 rotates, the lubricating liquid in the annular port moves toward the wiping cotton 9 due to the centrifugal force, so that the wiping cotton 9 can fully absorb it. Then, the rotating ring 10 rotates so that the wiping cotton 9 rotates while moving with the disc 8 in the direction away from the movable mold 1, so as to achieve the purpose of evenly wiping the lubricating liquid on the inner wall of the positioning hole 11, thereby avoiding the wear problem caused by the large friction generated when the positioning column 3 or the positioning plate 4 slides and fits with the positioning hole 11; When the movable mold 1 and the fixed mold 2 are separated, the sleeve 6 is first separated from the through hole, so that the extrusion rod 23 moves and resets under the action of the corresponding spring. During the movement and reset of the extrusion rod 23, since the first one-way valve in the conveying channel 24 is in a closed state, a negative pressure is generated in the conveying channel 24. At this time, the second one-way valve in the conveying pipe 25 opens. With the movement and reset of the extrusion rod 23 and the setting of the conveying pipe 25, the lubricating liquid in the central tank 26 is extracted back into the conveying channel 24 to form a recycling method. The movement and reset of the disc 8 causes the traction rope 20 to be pulled out of the transmission assembly 29 again, so that the rotating shaft 30 rotates to allow the corresponding spring or coil spring to store power again for the next use.

Claims

1. A high-precision positioning device for a plastic mold, comprising a movable mold and a fixed mold, wherein one end of the fixed mold opposite to the movable mold is provided with a positioning hole, and one end of the movable mold opposite to the fixed mold is provided with a positioning column slidably adapted to the positioning hole; 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.

2. A high-precision positioning device for a plastic mold according to claim 1, characterized in that: 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 slides with the conical platform, and the positioning plate is elastically connected to the side wall of the positioning column.

3. A high-precision positioning device for a plastic mold according to claim 2, characterized in that: An inner rod is slidably provided in the sleeve, and a connecting plate is fixedly connected to one end of the inner rod close to the movable mold, and a limiting rod is fixedly provided on one end of the connecting plate away from the inner rod, and the limiting rod is arranged on a side of the connecting plate close to the positioning plate, and an array of limiting holes slidably matched with the limiting rod are arranged on one end of the positioning plate close to the movable mold, and a sliding groove is arranged in the side wall of the positioning column, and the limiting rod is slidably arranged in the sliding groove.

4. A high-precision positioning device for a plastic mold according to claim 3, characterized in that: 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.

5. A high-precision positioning device for a plastic mold according to claim 4, characterized in that: 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.

6. A high-precision positioning device for a plastic mold according to claim 4, characterized in that: 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.

7. A high-precision positioning device for a plastic mold according to claim 6, characterized in that: 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.

8. A high-precision positioning device for a plastic mold according to claim 6, 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.

9. A high-precision positioning device for a plastic mold according to claim 8, 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.

10. A high-precision positioning device for a plastic mold according to claim 6, characterized in that: A tooth groove is provided on one 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 one 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.

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