A precision die for manufacturing an inner helical ratchet and a method of using the same

Abstract

The present application relates to the technical field of ratchet production mold, and specifically discloses a precision mold for internal spiral ratchet production and manufacturing and a use method thereof, which comprises a support, a mold assembly is installed inside the support, an auxiliary demolding assembly is installed inside the mold assembly, a transmission assembly is connected below the auxiliary demolding assembly, and a guide assembly is arranged on the surface of the mold assembly; the mold assembly comprises a mold outer cylinder; the transmission assembly is arranged, the guide rod is threadedly connected with the spiral seat, the axial linear motion of mold closing and mold opening is forcibly converted into the rotational angular displacement of the rotating ring, the first water outlet hole and the second water outlet hole are staggered and overlapped in the circumferential direction, mechanical automatic control of waterway on-off is realized, waste and cavity pollution caused by too early demolding agent spraying are avoided, lubrication failure caused by too late spraying is avoided, and the accuracy of lubrication timing of the internal spiral ratchet forming product in the demolding process is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of ratchet production molds, specifically a precision mold for manufacturing internal helical ratchet and its usage method. Background Technology

[0002] An internal helical ratchet is a mechanical part with helical teeth on its inner hole or inner cavity wall, which has a unidirectional intermittent transmission function. It is widely used in the transmission systems of bicycle flywheels, overrunning clutches, power tools, lifting equipment and medical devices. When this type of part is working, it needs to withstand large torque and alternating impact, so there are high requirements for its tooth profile accuracy, surface hardness and overall strength.

[0003] In terms of manufacturing methods, internal helical ratchet was initially produced by machining or powder metallurgy. However, machining has low material utilization and low mass production efficiency, while powder metallurgy is limited by the density distribution of parts and post-processing costs. With the development of engineering plastics and composite materials, injection molding has gradually become an important direction for producing internal helical ratchet. Especially for applications with medium load, corrosion resistance, vibration reduction and noise reduction, plastic internal helical ratchet can effectively reduce weight and lower costs.

[0004] Due to the presence of the internal spiral structure, the opening of the cooling water channels inside the core is greatly restricted, making it difficult to directly approach the surface of the spiral groove to fully cool the product. When demolding, the inside of the product is often still at a high temperature, with insufficient strength, and is more prone to deformation or whitening under the action of a large demolding force.

[0005] Some molds enhance cooling by setting annular water channels or spray structures inside the core. However, these structures usually require independent control valves and water supply systems, and are not linked to the demolding action. This results in the product not being cooled and impacted in time after the mold opens, and the demolding clamping force cannot be effectively reduced. Moreover, if the cooling water enters the cavity during the mold closing and injection stage, it will cause defects such as cold plastic material and weld lines in the plastic part. Therefore, the timing of turning the water on and off must be precisely matched with the opening and closing state of the mold. Summary of the Invention

[0006] The purpose of this invention is to provide a precision mold for manufacturing internal helical ratchet and a method for using it, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a precision mold for manufacturing an internal helical ratchet, comprising a support, a mold assembly installed inside the support, an auxiliary demolding assembly installed inside the mold assembly, a transmission assembly connected below the auxiliary demolding assembly, and a guide assembly provided on the surface of the mold assembly; The mold assembly includes a mold outer cylinder, an upper mold is installed above the mold outer cylinder, and a lower mold is provided below the mold outer cylinder; The guide assembly includes a second support ear plate fixed around the outer cylinder of the mold, and a guide rod is inserted inside the second support ear plate; The transmission assembly includes a connecting seat rotatably mounted below one of the second support lugs. A drive sprocket is fixed to the bottom of the connecting seat, and a helical seat is embedded inside the drive sprocket. A thread is provided at the connection between the guide rod and the helical seat. A transmission chain is meshed with the outside of the drive sprocket, and a driven sprocket is provided on the side of the drive sprocket. An output rod is fixed to the middle of the driven sprocket. The auxiliary demolding assembly includes a water outlet ring embedded inside the lower mold, a rotating ring rotatably connected inside the water outlet ring, and a connecting rod fixed below the rotating ring, which is welded and fixed to the output rod.

[0008] As a further embodiment of the present invention: the auxiliary membrane removal assembly further includes a fixed base disposed below the water outlet ring, the fixed base having an arc-shaped groove at the connection between it and the connecting rod, the bottom of the water outlet ring being connected to a water inlet pipe, and the water inlet pipe passing through the interior of the fixed base.

[0009] As a further embodiment of the present invention: the top of the water outlet ring is provided with a plurality of first water outlet holes that are evenly distributed at equal intervals, the interior of the rotating ring is provided with a plurality of second water outlet holes that are evenly distributed at equal intervals, and a sealing ring is provided at the connection between the bottom of the rotating ring and the water outlet ring.

[0010] As a further embodiment of the present invention: the upper half of the fixed base is a hollow structure, and the water inlet pipe is connected to the water outlet ring through the fixed base. The output rod passes through the bottom of the fixed base, and a dynamic seal is provided at the connection between the output rod and the fixed base.

[0011] As a further embodiment of the present invention: the mold assembly further includes a spiral groove formed on the inner wall of the lower mold, a base is provided at the bottom of the lower mold, and a core column is provided inside the lower mold.

[0012] As a further embodiment of the present invention: a sprocket protective cover is installed on the outside of the drive sprocket, the sprocket protective cover covers the outside of the transmission chain, and the sprocket protective cover is fixed below the lower mold.

[0013] As a further embodiment of the present invention: the transmission assembly further includes a connecting rod fixed to the top of the connecting seat, the top of the connecting rod is fixed with a guide head, and a guide groove is provided at the connection between the guide head and the second support ear plate.

[0014] As a further embodiment of the present invention: a linear bearing is provided at the connection between the second support ear plate and the guide rod, the guide assembly further includes a second guide sleeve sleeved on the end of the guide rod, a first guide sleeve sleeved on the top of the guide rod, the first guide sleeve being fixed above the second support ear plate, the upper mold being fixed around the first support ear plate, and the guide rod being fixed at the bottom of the first support ear plate.

[0015] As a further embodiment of the present invention: the bracket includes a lower base plate, with supporting columns fixed at the four corners of the lower base plate, and an upper top plate fixed at the top of the supporting columns. A hydraulic cylinder is bolted to the top of the upper top plate, and a movable rod runs through the interior of the upper top plate. A limit plate is welded to the top of the movable rod, and a buffer spring is connected between the limit plate and the upper top plate.

[0016] As a further aspect of the present invention: a method for using a precision mold for manufacturing an internal helical ratchet includes the following steps: S1. Mold Closure: The hydraulic cylinder pushes the upper mold to move down and close with the lower mold. The guide rod moves downward and drives the drive sprocket to rotate through the screw seat. In turn, the drive ring is driven to rotate through the transmission chain and the driven sprocket. S2, Water circuit closed: The second water outlet on the rotating ring is completely offset from the first water outlet on the water outlet ring, and the water circuit is closed to ensure that cooling water will not enter the cavity during subsequent injection molding. S3. Injection and Holding Pressure: The injection molding machine injects molten plastic into the cavity consisting of the outer cylinder of the mold, the lower mold, the upper mold and the core pillar. The molten material fills the spiral groove of the inner wall of the lower mold to form an inner spiral ratchet. Then it enters the holding pressure and cooling stage. The water channel is always kept closed. S4. Mold Opening and Demolding: After the product cools and sets, the hydraulic cylinder drives the upper mold to move upward to open the mold. The guide rod moves upward and the rotating ring rotates in the opposite direction through the transmission component, so that the second water outlet is aligned with the first water outlet and connected. Cooling water enters from the water inlet pipe, passes through the fixed base and the water outlet ring, and sprays out from the aligned hole, impacting the product to help it shrink and reduce the clamping force.

[0017] Compared with the prior art, the beneficial effects of the present invention include: 1. Through the transmission components, the axial linear motion of mold closing and opening is forcibly converted into the rotational angular displacement of the rotating ring by the threaded transmission between the guide rod and the screw seat. Then, through the staggered and overlapping of the first and second water outlets in the circumferential direction, the mechanical automatic control of the water passage is realized. This avoids waste and cavity contamination caused by premature spraying of the release agent, or lubrication failure caused by late spraying. It significantly improves the accuracy of lubrication timing during the demolding process of the internal spiral ratchet molded product, thereby effectively reducing the probability of molding defects such as ratchet damage and tooth tip chipping caused by poor lubrication. 2. By using a transmission assembly to reuse the opening and closing power of the mold as the driving force of the rotating ring, the release agent can be uniformly and forcefully sprayed through the overlapping first and second water outlets to the space between the core surface and the inner spiral surface of the plastic part each time the mold is opened. On the one hand, the high-pressure sprayed liquid acts as an interface medium, forming a uniform pressure liquid film or lubricating layer between the core and the plastic part, weakening the radial shrinkage clamping force of the cured plastic part on the core. On the other hand, the flow and wetting process of the liquid helps to clean away the tiny plastic debris or carbon deposits that may remain on the surface of the core in the previous molding cycle, and has a certain cooling effect, slowing down the surface roughness deterioration of the core working surface caused by long-term heat accumulation. 3. The guide rod serves as a mold closing guide post between the upper mold and the outer cylinder of the mold, and transmits rotational torque through the threaded section of the screw seat. In conjunction with the linear bearing in the second support ear plate and the first and second guide sleeves, it ensures high-precision guidance and smooth transmission for long-distance mold opening and closing movements. Attached Figure Description

[0018] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a schematic diagram of the mold assembly during separation according to the present invention; Figure 3 This is a schematic diagram of the structure of the present invention in half section; Figure 4 This is a schematic cross-sectional view of the water outlet ring of the present invention; Figure 5 This is a partial structural schematic diagram of the guide head of the present invention; Figure 6 This is a bottom view of the driven sprocket structure of the present invention; Figure 7 This is a schematic cross-sectional view of the outer cylinder of the mold of the present invention; Figure 8 This is a schematic diagram of the active sprocket of the present invention.

[0019] Figure label: 1. Bracket; 101. Lower base plate; 102. Upper top plate; 103. Support column; 104. Hydraulic cylinder; 105. Limiting plate; 106. Buffer spring; 107. Movable rod; 2. Mold assembly; 201. Mold outer cylinder; 202. Lower mold; 203. Upper mold; 204. Spiral groove; 205. Base; 206. Core column; 3. Transmission assembly; 301. Sprocket protective cover; 302. Drive sprocket; 303. Connecting seat; 304. Transmission chain; 305. Driven sprocket; 306. Linear bearing; 307. Connecting rod; 308. Guide head; 309. Guide groove; 310. Output rod; 311. Spiral seat; 4. Guide assembly; 401. First support ear plate; 402. Guide rod; 403. First guide sleeve; 404. Second support ear plate; 405. Second guide sleeve; 5. Auxiliary demolding assembly; 501. Water outlet ring; 502. First water outlet hole; 503. Rotating ring; 504. Second water outlet hole; 505. Arc groove; 506. Fixed base; 507. Water inlet pipe; 508. Connecting rod. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Please see Figures 1 to 8 The present invention provides a precision mold for manufacturing an internal spiral ratchet, including a bracket 1, a mold assembly 2 installed inside the bracket 1, an auxiliary demolding assembly 5 installed inside the mold assembly 2, a transmission assembly 3 connected below the auxiliary demolding assembly 5, and a guide assembly 4 provided on the surface of the mold assembly 2. The mold assembly 2 includes a mold outer cylinder 201, an upper mold 203 is installed above the mold outer cylinder 201, and a lower mold 202 is provided below the mold outer cylinder 201; The guide assembly 4 includes a second support ear plate 404 fixed around the outer cylinder 201 of the mold, and a guide rod 402 is inserted inside the second support ear plate 404; The transmission assembly 3 includes a connecting seat 303 rotatably mounted below one of the second support lugs 404. A drive sprocket 302 is fixed to the bottom of the connecting seat 303, and a screw seat 311 is embedded inside the drive sprocket 302. A thread is provided at the connection between the guide rod 402 and the screw seat 311. A transmission chain 304 is meshed with the outside of the drive sprocket 302, and a driven sprocket 305 is provided on the side of the drive sprocket 302. An output rod 310 is fixed to the middle of the driven sprocket 305. The auxiliary demolding assembly 5 includes a water outlet ring 501 embedded inside the lower mold 202. A rotating ring 503 is rotatably connected inside the water outlet ring 501. A connecting rod 508 is fixed below the rotating ring 503 and is welded and fixed to the output rod 310.

[0022] Specifically, such as Figure 4 and Figure 8 As shown, the auxiliary membrane removal assembly 5 also includes a fixed base 506 disposed below the water outlet ring 501. An arc-shaped groove 505 is provided at the connection between the fixed base 506 and the connecting rod 508. A water inlet pipe 507 is connected to the bottom of the water outlet ring 501, and the water inlet pipe 507 passes through the interior of the fixed base 506. The top of the water outlet ring 501 is provided with a plurality of first water outlet holes 502 that are evenly distributed at equal intervals, and the interior of the rotating ring 503 is provided with a plurality of second water outlet holes 504 that are evenly distributed at equal intervals. A sealing ring is provided at the connection between the bottom of the rotating ring 503 and the water outlet ring 501. The upper part of the fixed base 506 is hollow, and the water inlet pipe 507 is connected to the water outlet ring 501 through the fixed base 506. The output rod 310 passes through the bottom of the fixed base 506, and a dynamic seal is provided at the connection between the output rod 310 and the fixed base 506.

[0023] It is important to note that by using the transmission component 3, the axial linear motion of mold closing and opening is forcibly converted into the rotational angular displacement of the rotating ring 503 through the threaded transmission cooperation between the guide rod 402 and the screw seat 311. Then, through the staggered and overlapping of the first water outlet 502 and the second water outlet 504 in the circumferential direction, the mechanical automatic control of the water passage is realized. This avoids waste and cavity contamination caused by premature spraying of the release agent, or lubrication failure caused by late spraying. It significantly improves the accuracy of the lubrication timing during the demolding process of the internal spiral ratchet molded product, thereby effectively reducing the probability of molding defects such as ratchet damage and tooth tip chipping caused by poor lubrication.

[0024] Specifically, such as Figure 5 and Figure 7 As shown, the mold assembly 2 also includes a spiral groove 204 formed on the inner wall of the lower mold 202, a base 205 is provided at the bottom of the lower mold 202, and a core column 206 is provided inside the lower mold 202. The transmission assembly 3 also includes a connecting rod 307 fixed to the top of the connecting seat 303. A guide head 308 is fixed to the top of the connecting rod 307, and a guide groove 309 is provided at the connection between the guide head 308 and the second support ear plate 404. It is important to note that by using the transmission component 3 to reuse the opening and closing power as the driving force of the rotating ring 503, the release agent can be uniformly and forcefully sprayed through the overlapping first water outlet 502 and second water outlet 504 onto the surface of the core 206 and the inner spiral surface of the plastic part each time the mold is opened. On the one hand, the high-pressure sprayed liquid acts as an interface medium, forming a uniform pressure liquid film or lubricating layer between the core and the plastic part, weakening the radial shrinkage clamping force of the cured plastic part on the core. On the other hand, the flow and wetting process of the liquid helps to clean away the tiny plastic debris or carbon deposits that may remain on the surface of the core in the previous molding cycle, and has a certain cooling effect, slowing down the surface roughness deterioration of the core working surface caused by long-term heat accumulation.

[0025] Specifically, such as Figures 4-8 As shown, a sprocket protective cover 301 is installed on the outside of the drive sprocket 302. The sprocket protective cover 301 covers the outside of the transmission chain 304 and is fixed below the lower mold 202. A linear bearing 306 is provided at the connection between the second support ear plate 404 and the guide rod 402. The guide assembly 4 also includes a second guide sleeve 405 sleeved on the end of the guide rod 402. A first guide sleeve 403 is sleeved on the top of the guide rod 402. The first guide sleeve 403 is fixed above the second support ear plate 404. The upper mold 203 is fixed around the first support ear plate 401, and the guide rod 402 is fixed at the bottom of the first support ear plate 401. The bracket 1 includes a lower base plate 101, with support columns 103 fixed at the four corners of the lower base plate 101, and an upper top plate 102 fixed at the top of the support columns 103. A hydraulic cylinder 104 is bolted to the top of the upper top plate 102, and a movable rod 107 passes through the interior of the upper top plate 102. A limit plate 105 is welded to the top of the movable rod 107, and a buffer spring 106 is connected between the limit plate 105 and the upper top plate 102.

[0026] It should be noted that when oil enters the working chamber of the hydraulic cylinder 104, it drives the movable rod 107 to move downward. The movable rod 107 pushes the upper mold 203 to move downward. During this process, the guide rod 402, which is fixed to the bottom of the first support ear plate 401, moves downward synchronously with the upper mold 203 to achieve mold closing. The guide rod 402 serves as a mold closing guide post between the upper mold 203 and the outer cylinder 201 of the mold. On the other hand, it transmits rotational torque through the threaded section of the screw seat 311. In conjunction with the linear bearing 306 in the second support ear plate 404 and the first guide sleeve 403 and the second guide sleeve 405, it ensures high-precision guidance and smooth transmission for long-distance mold opening and closing movements.

[0027] Specifically, such as Figures 1-8 As shown, the present invention provides a method for using a precision mold for manufacturing internal helical ratchet, comprising the following steps: S1. Mold closing: The hydraulic cylinder 104 pushes the upper mold 203 to move down and close with the lower mold 202. The guide rod 402 moves downward and drives the drive sprocket 302 to rotate through the screw seat 311. In turn, the drive ring 503 is driven to rotate through the transmission chain 304 and the driven sprocket 305. S2, Water circuit closed: The second water outlet 504 on the rotating ring 503 is completely offset from the first water outlet 502 on the water outlet ring 501, and the water circuit is closed to ensure that cooling water will not enter the cavity during subsequent injection molding. S3. Injection and holding pressure: The injection molding machine injects molten plastic into the cavity formed by the outer cylinder 201, lower mold 202, upper mold 203 and core 206. The molten material fills the spiral groove 204 on the inner wall of the lower mold 202 to form an inner spiral ratchet. Then it enters the holding pressure and cooling stage. The water channel is always kept closed. S4. Mold Opening and Demolding: After the product cools and sets, the hydraulic cylinder 104 drives the upper mold 203 to move upward to open the mold. The guide rod 402 moves upward and causes the rotating ring 503 to rotate in the opposite direction through the transmission component 3, so that the second water outlet 504 is aligned and connected with the first water outlet 502. Cooling water enters from the water inlet pipe 507, passes through the fixed base 506 and the water outlet ring 501, and sprays out from the aligned holes, impacting the product to help it shrink and reduce the clamping force.

[0028] Working principle: When the operation begins, oil enters the working chamber of the hydraulic cylinder 104, driving the movable rod 107 to move downward. The movable rod 107 pushes the upper mold 203 to move downward. During this process, the guide rod 402, which is fixed to the bottom of the first support ear plate 401, moves downward synchronously with the upper mold 203. The guide rod 402 passes through the linear bearing 306 in the second support ear plate 404 fixed around the lower mold 202 and moves axially relative to the internal thread section of the screw seat 311 in the transmission assembly 3. Since the guide rod 402 and the screw seat 311 are threaded transmission fit, when the guide rod 402 makes axial linear movement, the linear movement is forcibly converted into the rotational movement of the screw seat 311. Since the screw seat 311 is embedded and fixed inside the drive sprocket 302, the drive sprocket 302 rotates synchronously with the screw seat 311. The rotational motion of the driving sprocket 302 is transmitted to the driven sprocket 305 via the transmission chain 304, which in turn drives the output rod 310 fixed in the driven sprocket 305 to rotate. The output rod 310 transmits the rotational motion to the connecting rod 508, which in turn drives the rotating ring 503 fixed thereto to rotate inside the water outlet ring 501. When the upper mold 203 and the lower mold 202 are fully closed, the guide rod 402 reaches its lower limit position. At this time, the rotating ring 503 rotates to a specific position under the drive of the transmission chain. A fixed angle is used to completely offset all the second water outlets 504 on the rotating ring 503 from all the corresponding first water outlets 502 on the water outlet ring 501 in the circumferential direction. Because a sealing ring is provided at the connection between the bottom of the rotating ring 503 and the water outlet ring 501, and a dynamic seal is provided at the connection between the output rod 310 and the fixed base 506, the water supply passage formed by the water inlet pipe 507, the hollow cavity of the fixed base 506, and the water outlet ring 501 is mechanically cut off at the rotating ring 503, and the water flow cannot be sprayed upward. Molten plastic from the injection molding machine is injected into the mold cavity formed by the outer cylinder 201, the lower mold 202, the upper mold 203, and the core column 206. The molten plastic fills the spiral groove 204 area and covers the core column 206, forming the feature of an inner spiral ratchet. After cooling and solidification, oil enters the other working chamber of the hydraulic cylinder 104, driving the movable rod 107 to move upward, which in turn moves the upper mold 203 upward, thus opening the mold. The guide rod 402 moves axially upward synchronously with the upper mold 203. During this reset process, the guide rod 402 drives the screw seat 311 and the drive sprocket 302 to perform a rotational motion in the opposite direction to that during mold closing through the reverse thread transmission with the screw seat 311. This reverse rotation is transmitted through the transmission chain 304, the driven sprocket 305, the output rod 310 and the connecting rod 508, and finally drives the rotating ring 503 to rotate in the opposite direction within the water outlet ring 501. When the guide rod 402 moves upward to a certain preset position or the upper limit position of the stroke, the rotating ring 503 rotates to another specific angle. At this time, the multiple second water outlet holes 504 opened on the rotating ring 503 and the multiple first water outlet holes 502 opened on the water outlet ring 501 are aligned and overlapped in the circumferential direction. When the water holes are aligned, pressurized water enters the hollow cavity of the fixed base 506 through the water inlet pipe 507, and then fills the water outlet ring 501. The water then flows upward through the first water outlet 502 and the second water outlet 504 that have been aligned and overlapped, and is evenly sprayed between the surface of the core pillar 206 and the inner spiral surface of the molded plastic part. The sprayed liquid acts as a release agent, which plays a role in lubrication and interface separation, significantly reducing the coefficient of friction and clamping force between the plastic part and the core pillar 206, thereby playing a role in assisting demolding.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A precision mold for manufacturing an internal helical ratchet, comprising a support, characterized in that: The bracket is equipped with a mold assembly, and the mold assembly is equipped with an auxiliary demolding assembly. A transmission assembly is connected below the auxiliary demolding assembly, and a guide assembly is provided on the surface of the mold assembly. The mold assembly includes a mold outer cylinder, an upper mold is installed above the mold outer cylinder, and a lower mold is provided below the mold outer cylinder; The guide assembly includes a second support ear plate fixed around the outer cylinder of the mold, and a guide rod is inserted inside the second support ear plate; The transmission assembly includes a connecting seat rotatably mounted below one of the second support lugs. A drive sprocket is fixed to the bottom of the connecting seat, and a helical seat is embedded inside the drive sprocket. A thread is provided at the connection between the guide rod and the helical seat. A transmission chain is meshed with the outside of the drive sprocket, and a driven sprocket is provided on the side of the drive sprocket. An output rod is fixed to the middle of the driven sprocket. The auxiliary demolding assembly includes a water outlet ring embedded inside the lower mold, a rotating ring rotatably connected inside the water outlet ring, and a connecting rod fixed below the rotating ring, which is welded and fixed to the output rod.

2. The precision mold for manufacturing an internal helical ratchet according to claim 1, characterized in that: The auxiliary membrane removal assembly also includes a fixed base located below the water outlet ring. An arc-shaped groove is provided at the connection between the fixed base and the connecting rod. A water inlet pipe is connected to the bottom of the water outlet ring and passes through the interior of the fixed base.

3. The precision mold for manufacturing an internal helical ratchet according to claim 2, characterized in that: The top of the water outlet ring has multiple equidistant and evenly distributed first water outlet holes, the inside of the rotating ring has multiple equidistant and evenly distributed second water outlet holes, and a sealing ring is provided at the connection between the bottom of the rotating ring and the water outlet ring.

4. The precision mold for manufacturing an internal helical ratchet according to claim 3, characterized in that: The upper half of the fixed base is a hollow structure, and the water inlet pipe is connected to the water outlet ring through the fixed base. The output rod passes through the bottom of the fixed base, and a dynamic seal is provided at the connection between the output rod and the fixed base.

5. The precision mold for manufacturing an internal helical ratchet according to claim 1, characterized in that: The mold assembly also includes a spiral groove formed on the inner wall of the lower mold, a base is provided at the bottom of the lower mold, and a core column is provided inside the lower mold.

6. The precision mold for manufacturing an internal helical ratchet according to claim 1, characterized in that: The drive sprocket is equipped with a sprocket protective cover, which covers the outside of the transmission chain and is fixed below the lower mold.

7. A precision mold for manufacturing an internal helical ratchet according to claim 6, characterized in that: The transmission assembly also includes a connecting rod fixed to the top of the connecting seat. A guide head is fixed to the top of the connecting rod, and a guide groove is provided at the connection between the guide head and the second support ear plate.

8. The precision mold for manufacturing an internal helical ratchet according to claim 7, characterized in that: A linear bearing is provided at the connection between the second support ear plate and the guide rod. The guide assembly also includes a second guide sleeve sleeved at the end of the guide rod. A first guide sleeve is sleeved on the top of the guide rod. The first guide sleeve is fixed above the second support ear plate. The upper mold is fixed around the first support ear plate, and the guide rod is fixed at the bottom of the first support ear plate.

9. A precision mold for manufacturing an internal helical ratchet according to claim 1, characterized in that: The bracket includes a lower base plate, with supporting columns fixed at the four corners of the lower base plate, and an upper top plate fixed at the top of the supporting columns. A hydraulic cylinder is bolted to the top of the upper top plate, and a movable rod runs through the interior of the upper top plate. A limit plate is welded to the top of the movable rod, and a buffer spring connects the limit plate and the upper top plate.

10. A method for using a precision mold for manufacturing an internal helical ratchet, characterized in that: Includes the following steps: S1. Mold Closure: The hydraulic cylinder pushes the upper mold to move down and close with the lower mold. The guide rod moves downward and drives the drive sprocket to rotate through the screw seat. In turn, the drive ring is driven to rotate through the transmission chain and the driven sprocket. S2, Water circuit closed: The second water outlet on the rotating ring is completely offset from the first water outlet on the water outlet ring, and the water circuit is closed to ensure that cooling water will not enter the cavity during subsequent injection molding. S3. Injection and Holding Pressure: The injection molding machine injects molten plastic into the cavity consisting of the outer cylinder of the mold, the lower mold, the upper mold and the core pillar. The molten material fills the spiral groove of the inner wall of the lower mold to form an inner spiral ratchet. Then it enters the holding pressure and cooling stage. The water channel is always kept closed. S4. Mold Opening and Demolding: After the product cools and sets, the hydraulic cylinder drives the upper mold to move upward to open the mold. The guide rod moves upward and the rotating ring rotates in the opposite direction through the transmission component, so that the second water outlet is aligned with the first water outlet and connected. Cooling water enters from the water inlet pipe, passes through the fixed base and the water outlet ring, and sprays out from the aligned hole, impacting the product to help it shrink and reduce the clamping force.

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