Precise demolding and injection molding device for nylon retainer

Abstract

The invention relates to the technical field of retainer injection molding, and discloses a precise demolding injection molding device for a nylon retainer, the precise demolding injection molding device comprises an outer mold unit, the outer mold unit comprises a mounting ring and a built-in ring mounted on the inner circle of the mounting ring, the mounting ring is provided with a mounting groove, the mounting groove is internally provided with a mold mechanism, and the mold mechanism comprises a core mold and a side mold; the die mechanism further comprises a telescopic assembly, and the telescopic assembly drives the side dies to move so as to be spliced with each other. The inner mold unit comprises a mold column, a crosspiece mechanism is arranged at the bottom of the mold column, and the crosspiece mechanism comprises a stop lever and a driving assembly; and the mold column moves downwards and forms a mold cavity with the built-in ring, the core mold and the side mold, and the mold cavity is subjected to injection molding to form the nylon retainer. Through the synergistic effect of the telescopic assembly, the elastic moving assembly and the reset assembly, core mold retreating and side mold splicing linkage are achieved, the contact gap between the side mold and a nylon retainer is greatly reduced, deformation or scratching of the retainer during demolding is avoided, and the product precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of cage injection molding technology, and more specifically, relates to a precision demolding injection molding device for nylon cages. Background Technology

[0002] Nylon cages, due to their lightweight, wear-resistant, and corrosion-resistant properties, are widely used in precision machinery fields such as bearings. Their molding quality directly affects the bearing's operational accuracy and service life. Currently, nylon cages are mostly produced using injection molding, but existing injection molding demolding devices have several technical defects: First, the mold opening and closing and demolding actions are not smoothly coordinated, and the core mold exit and side mold separation are not synchronized, easily leading to cage jamming, deformation, or surface scratches, failing to meet precision machining requirements; second, the demolding gripping mechanism is poorly designed, resulting in unstable cage gripping, easily causing problems such as falling and bumping, affecting product qualification rates; third, there is a lack of efficient automatic conveying and resetting mechanisms, requiring high manual intervention, resulting in low production efficiency and difficulty adapting to large-scale production; fourth, the mold component movement and guiding accuracy is insufficient, resulting in poor cavity molding consistency, and component resetting relies on complex drive structures, leading to a high probability of equipment failure and high maintenance costs. Furthermore, existing devices are mostly designed for ordinary plastic parts and do not fully consider the characteristics of nylon material—high toughness and easy adhesion to the mold after molding—further exacerbating the demolding difficulty.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a precision demolding injection molding device for nylon retainers. Through the coordinated action of a telescopic component, an elastic moving component, and a resetting component, the device achieves simultaneous core mold exit and side mold assembly, significantly reducing the contact gap between the side mold and the nylon retainer. This prevents retainer deformation or scratches during demolding, improving product precision. Simultaneously, the stop bar and push rod work together to stably grip and push the retainer. Combined with automatic conveyor belt transport, this reduces manual intervention, improves demolding efficiency and production continuity, and is suitable for large-scale production needs.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] Precision injection molding device for nylon retainers, including,

[0007] The outer mold unit includes a mounting ring and an inner ring installed on the inner ring of the mounting ring. The mounting ring has a mounting groove, and a mold mechanism is provided inside the mounting groove. The mold mechanism includes a core mold and a side mold. The mold mechanism also includes a telescopic component, which drives the side mold to move so that they can be assembled together.

[0008] An inner mold unit includes a mold column, the bottom of which is provided with a crossbar mechanism, the crossbar mechanism including a stop bar and a drive assembly, the drive assembly driving the stop bar to extend to hook up the retainer;

[0009] The mold column moves downward and forms a mold cavity with the built-in ring, core mold and side mold, and the mold cavity is injection molded to form a nylon retainer.

[0010] In a preferred embodiment of the present invention, the telescopic component includes a connecting block, with fixed plates fixedly installed on both sides of the connecting block and a sliding rod fixedly installed between the two fixed plates. A support plate is installed in the middle of the sliding rod. The telescopic component also includes a connecting plate, which is movably sleeved on the sliding rod. A connecting rod is fixedly installed on one side of the connecting plate and is fixedly connected to the side mold.

[0011] In a preferred embodiment of the present invention, a plug rod is fixedly installed on one side of the core mold, and the mold mechanism further includes an elastic moving component. The elastic moving component includes a sleeve movably sleeved on the plug rod, pull rods are rotatably installed on both sides of the sleeve, one end of the pull rod is rotatably connected to the connecting plate, and protrusions are fixedly installed on both sides of the plug rod. When the plug rod moves, it abuts against the sleeve through the protrusions. The elastic moving component also includes a first spring movably sleeved on the slide rod.

[0012] In a preferred embodiment of the present invention, the mold mechanism further includes a reset assembly, which includes a support block. The support block is fixedly installed on the inner wall of the mounting groove of the mounting ring. A support rod is movably inserted into one side of the support block, and the other end of the support rod is fixedly installed on the connecting block. A second spring is movably sleeved on the support rod, and the inserted rod movably passes through the support block and extends to the other side.

[0013] In a preferred embodiment of the present invention, the outer mold unit further includes a first guide mechanism, the first guide mechanism including a turntable, the turntable being rotatably mounted on the outside of the mounting ring, the turntable having a first guide groove, one end of the insertion rod being fixedly mounted with a first guide rod, the first guide rod being adapted to the first guide groove, a fixing block being fixedly mounted on the outside of the mounting ring, and a fixing ring being fixedly mounted on the outside of the fixing block.

[0014] In a preferred embodiment of the present invention, a base is installed at the bottom of the fixing ring, and a pushing mechanism is provided on the base. The pushing mechanism is used to drive the turntable to rotate. The driving mechanism includes a first telescopic element installed on the top of the base. A connecting frame is rotatably installed at the output end of the first telescopic element, and one end of the connecting frame is rotatably connected to the turntable.

[0015] In a preferred embodiment of the present invention, a second guiding mechanism is provided inside the mold column. The second guiding mechanism includes an inner rotating column rotatably mounted on the mold column. A second guiding groove is provided at the bottom of the inner rotating column. A second guiding rod is adapted to be connected in the second guiding groove. One end of the second guiding rod is fixedly connected to a stop rod. The stop rod movably passes through the mold column. When the inner rotating column rotates, the movement of the stop rod is controlled by the second guiding rod and the second guiding groove.

[0016] In a preferred embodiment of the present invention, the driving assembly includes a motor fixedly mounted on one side of the mold column, a second gear fixedly mounted on the output end of the motor, a first gear meshing with one side of the second gear, and the first gear fixedly connected to the inner rotating column.

[0017] A fixing component is fixedly installed on the side of the mold column, and a third telescopic element is installed on the top of the fixing component.

[0018] In a preferred embodiment of the present invention, the inner mold unit further includes an ejection mechanism, which includes a push rod movably inserted into the mold column. A third guide rod is fixedly installed on the top of the push rod. An annular groove is formed on the mold column. A third spring is movably sleeved on the part of the push rod located in the annular groove. A sleeve ring is movably sleeved on the outside of the annular groove. A third guide groove is formed on the sleeve ring. The third guide groove is adapted to the third guide rod. A second telescopic element is installed on the side of the mold column. The output end of the second telescopic element is fixedly connected to the sleeve ring.

[0019] In a preferred embodiment of the present invention, a conveyor belt is further included, and a fourth telescopic element is installed on one side of the conveyor belt. The fourth telescopic element drives the conveyor belt to move between the outer mold unit and the inner mold unit to convey the retainer.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention achieves the coordinated action of the telescopic component, the elastic moving component, and the reset component to realize the linkage between the core mold exit and the side mold assembly, which greatly reduces the contact gap between the side mold and the nylon cage, avoids cage deformation or scratches during demolding, improves product precision, and reduces the defect rate of nylon cages.

[0022] This invention achieves automatic component reset through a spring structure, simplifies the driving logic, reduces the probability of equipment failure, has a compact overall structure, and a smooth and orderly demolding process. It not only solves the problem of difficult demolding of precision nylon cages, but also improves the operational stability and service life of the equipment.

[0023] This invention uses waste nylon as the core injection molding raw material and realizes the resource utilization and high-value utilization of waste nylon through a matching recycling processing unit. Compared with the traditional production mode that uses virgin nylon raw materials, it has significant technical, economic and environmental advantages. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the precision demolding injection molding device for nylon retainers according to the present invention;

[0025] Figure 2 This is a schematic diagram of the connecting frame structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure at the fixing block of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure at the mounting ring of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the mounting slot of the present invention;

[0029] Figure 6 This is a schematic diagram of the mold mechanism structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal mold unit structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure at the inner rotating column of the present invention;

[0032] Figure 9 This is a schematic diagram of the push rod structure of the present invention.

[0033] Figure label:

[0034] 100. Base; 101. Fixing ring; 102. Fixing block; 103. Mounting ring; 104. Mounting groove; 105. Internal ring;

[0035] 200. Core mold; 201. Insert rod; 202. Side mold; 203. Connecting rod; 204. Connecting plate; 205. Connecting block; 206. Fixing plate; 207. Slide rod; 208. First spring; 209. Support plate; 210. Pull rod; 211. Sleeve; 212. Protrusion; 213. Support rod; 214. Second spring; 215. Support block; 216. First guide rod; 217. Turntable; 218. First guide groove; 219. Connecting frame; 220. First telescopic element;

[0036] 300. Mold column; 301. Inner rotating column; 302. First gear; 303. Second gear; 304. Motor; 305. Second guide groove; 306. Second guide rod; 307. Stop bar; 308. Annular groove; 309. Push rod; 310. Third spring; 311. Third guide rod; 312. Sleeve ring; 313. Third guide groove; 314. Second telescopic element; 315. Fixing component; 316. Third telescopic element;

[0037] 400. Conveyor belt; 401. Fourth telescopic element. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0039] Example 1:

[0040] like Figures 1 to 9 As shown, the precision ejection injection molding device for nylon retainers includes:

[0041] The outer mold unit includes a mounting ring 103 and an inner ring 105 installed in the inner ring of the mounting ring 103. The mounting ring 103 has a mounting groove 104. A mold mechanism is provided inside the mounting groove 104. The mold mechanism includes a core mold 200 and a side mold 202. The mold mechanism also includes a telescopic component. The telescopic component drives the side mold 202 to move so that they can be assembled together.

[0042] The inner mold unit includes a mold column 300, and a horizontal stop mechanism is provided at the bottom of the mold column 300. The horizontal stop mechanism includes a stop bar 307 and a drive assembly. The drive assembly drives the stop bar 307 to extend to hook up the retainer.

[0043] The mold column 300 moves downward and forms a mold cavity with the inner ring 105, the core mold 200 and the side mold 202, and the mold cavity is injection molded to form a nylon retainer.

[0044] like Figure 6 As shown, the telescopic assembly further includes a connecting block 205, with fixed plates 206 fixedly installed on both sides of the connecting block 205, and a slide rod 207 fixedly installed between the two fixed plates 206. A support plate 209 is installed in the middle of the slide rod 207. The telescopic assembly also includes a connecting plate 204, which is movably sleeved on the slide rod 207. A connecting rod 203 is fixedly installed on one side of the connecting plate 204, and the connecting rod 203 is fixedly connected to the side mold 202. In this configuration, the connecting plate 204 slides on the slide rod 207 to drive the side mold 202 to move. When the core mold 200 is withdrawn, the two side molds 202 are joined together to reduce the distance between the two sides of the side mold 202, facilitating the withdrawal of the retainer.

[0045] like Figure 6 As shown, further, a rod 201 is fixedly installed on one side of the core mold 200. The mold mechanism also includes an elastic moving component, which includes a sleeve 211 movably fitted onto the rod 201. Pull rods 210 are rotatably installed on both sides of the sleeve 211. One end of the pull rod 210 is rotatably connected to the connecting plate 204. Protrusions 212 are fixedly installed on both sides of the rod 201. When the rod 201 moves, it abuts against the sleeve 211 through the protrusions 212. The elastic moving component also includes a first spring 208 movably fitted onto the slide rod 207. In this configuration, when the protrusions 212 follow the rod 201 to the state of abutting against the sleeve 211, the rod 201 continues to move and drives the sleeve 211 to move through the protrusions 212. When the sleeve 211 moves, it drives the connecting plates 204 on both sides to move through the pull rods 210 and compresses the first spring 208.

[0046] like Figures 5 to 6 As shown, the mold mechanism further includes a reset assembly, which includes a support block 215. The support block 215 is fixedly installed on the inner wall of the mounting groove 104 of the mounting ring 103. A support rod 213 is movably inserted into one side of the support block 215, and the other end of the support rod 213 is fixedly installed on the connecting block 205. A second spring 214 is movably sleeved on the support rod 213. The insertion rod 201 movably passes through the support block 215 and extends to the other side. In this configuration, the elastic coefficient of the second spring 214 is greater than that of the first spring 208, so that during the compression of the first spring 208, the elastic force of the second spring 214 can keep the connecting block 205 stationary. When the protrusion 212 abuts against the sleeve 211, it drives the connecting block 205 to move and compress the second spring 214.

[0047] like Figures 3 to 5 As shown, the outer mold unit further includes a first guiding mechanism, which includes a turntable 217 rotatably mounted on the outside of the mounting ring 103. A first guide groove 218 is formed on the turntable 217. A first guide rod 216 is fixedly mounted on one end of the insertion rod 201, and the first guide rod 216 is adapted to the first guide groove 218. A fixing block 102 is fixedly mounted on the outside of the mounting ring 103, and a fixing ring 101 is fixedly mounted on the outside of the fixing block 102. In this configuration, the first guide groove 218 is arc-shaped. When the turntable 217 rotates, the turntable 217 drives the first guide groove 218 to rotate, and the first guide groove 218 drives the first guide rod 216 to move, thereby pushing the insertion rod 201 to move.

[0048] like Figures 1 to 2As shown, a base 100 is further mounted on the bottom of the fixing ring 101. A pushing mechanism is provided on the base 100 to drive the turntable 217 to rotate. The driving mechanism includes a first telescopic element 220 mounted on the top of the base 100. A connecting frame 219 is rotatably mounted on the output end of the first telescopic element 220, and one end of the connecting frame 219 is rotatably connected to the turntable 217. In this configuration, when the first telescopic element 220 is working, it pushes the turntable 217 to rotate through the connecting frame 219.

[0049] like Figures 7 to 8 As shown, furthermore, a second guiding mechanism is provided inside the mold column 300. The second guiding mechanism includes an inner rotating column 301 rotatably mounted on the mold column 300. A second guiding groove 305 is provided at the bottom of the inner rotating column 301. A second guiding rod 306 is adapted to be connected in the second guiding groove 305. The second guiding rod 306 is fixedly connected to one end of a stop rod 307. The stop rod 307 movably passes through the mold column 300. When the inner rotating column 301 rotates, the movement of the stop rod 307 is controlled by the second guiding rod 306 and the second guiding groove 305. In this configuration, the inner rotating column 301 drives the stop rod 307 to extend through the second guiding groove 305 and the second guiding rod 306. The stop rod 307 extends to insert into the hole of the retainer, ensuring that the retainer can be removed when the mold column 300 rises.

[0050] like Figure 1 , Figure 7 As shown, the drive assembly further includes a motor 304 fixedly installed on one side of the mold column 300, a second gear 303 fixedly installed at the output end of the motor 304, a first gear 302 meshing with one side of the second gear 303, and the first gear 302 fixedly connected to the inner rotating column 301.

[0051] A fastener 315 is fixedly installed on the side of the mold column 300, and a third telescopic element 316 is installed on the top of the fastener 315.

[0052] In this configuration, the motor 304 drives the second gear 303 to rotate, and the second gear 303 drives the first gear 302 to rotate through meshing, and the first gear 302 drives the inner rotating column 301 to rotate.

[0053] like Figure 7 , Figure 9As shown, the inner mold unit further includes an ejection mechanism, which includes a push rod 309 movably inserted into the mold column 300. A third guide rod 311 is fixedly installed on the top of the push rod 309. An annular groove 308 is provided on the mold column 300. A third spring 310 is movably sleeved on the part of the push rod 309 located in the annular groove 308. A sleeve ring 312 is movably sleeved on the outside of the annular groove 308. A third guide groove 313 is provided on the sleeve ring 312. The third guide groove 313 is adapted to the third guide rod 311. A second telescopic element 314 is installed on the side of the mold column 300. The output end of the second telescopic element 314 is fixedly connected to the sleeve ring 312. In this configuration, the second telescopic element 314 drives the sleeve ring 312 to move downward, and during the movement, it drives the third guide rod 311 to rotate through the third guide groove 313, thereby driving the push rod 309 to rotate, ensuring that the push rod 309 can disengage from the cage. When the end of the third guide groove 313 abuts against the third guide rod 311, the sleeve ring 312 drives the third guide rod 311 to move downward, so that the push rod 309 moves downward.

[0054] like Figure 1 As shown, it further includes a conveyor belt 400, on one side of which a fourth telescopic element 401 is installed. The fourth telescopic element 401 drives the conveyor belt 400 to move between the outer mold unit and the inner mold unit to convey the retainer.

[0055] Example 2

[0056] This embodiment describes the working principle of the device described in Embodiment 1 in conjunction with the nylon cage processing process.

[0057] This embodiment uses recycled nylon waste as raw material, including injection molding waste, defective products, gate material, and externally recycled nylon products. During pretreatment, the waste materials such as injection molding waste, defective products, and externally recycled nylon products are first fed into a twin-shaft crusher to be crushed into 3-5mm particles. After being screened by two layers of screening screens and magnetically removed to remove impurities and metal fragments, they are sent to a hot air circulating dryer to reduce the moisture content to below 0.2%. Finally, the mixing mechanism mixes the materials with new materials in proportion, adds additives, and conveys them to the feeder.

[0058] In this embodiment, the implementation principle of the precision demolding injection molding device for nylon retainers is as follows: During injection molding, the core mold 200, the side mold 202, the built-in ring 105, and the mold column 300 form a mold cavity. The pre-treated raw material is melted and injected into the mold cavity and then solidified to form a nylon retainer.

[0059] During demolding, the first telescopic element 220 is controlled to retract, and during the retraction process, the turntable 217 is pulled to rotate through the connecting frame 219. During the rotation of the turntable 217, the first guide rod 216 is moved through the first guide groove 218, and the insertion rod 201 is moved during the movement. During the movement of the insertion rod 201, the core mold 200 is pulled out. When the core mold 200 is out, the protrusion 212 moves with the insertion rod 201 to the state of abutting against the sleeve 211. At this time, the insertion rod 201 continues to move, and the sleeve 211 is moved through the protrusion 212. When the sleeve 211 moves, the connecting plates 204 on both sides are moved through the pull rod 210, and the first spring 208 is compressed. At the same time as the connecting plates 204 move, the side mold 202 is assembled through the connecting rod 203. After the assembly is completed, the insertion rod 201 continues to move to drive the side mold 202 to retract.

[0060] At this time, the motor 304 is started, and the motor 304 drives the second gear 303 to rotate. The second gear 303 drives the first gear 302 to rotate through meshing. The first gear 302 drives the inner rotating column 301 to rotate. The inner rotating column 301 drives the stop rod 307 to extend through the second guide groove 305 and the second guide rod 306. The stop rod 307 extends to insert into the hole of the retainer, ensuring that the retainer can be removed when the mold column 300 rises.

[0061] When the third telescopic element 316 rises, it drives the mold column 300 to rise through the fixing member 315. At this time, the fourth telescopic element 401 is activated and the conveyor belt 400 is pushed to the bottom of the mold column 300. The second telescopic element 314 is activated and drives the sleeve ring 312 to move downward. During the movement, the third guide rod 311 is rotated through the third guide groove 313 to drive the push rod 309 to rotate, ensuring that the push rod 309 can disengage from the cage. When the end of the third guide groove 313 abuts against the third guide rod 311, the sleeve ring 312 drives the third guide rod 311 to move downward, so that the push rod 309 moves downward. At this time, the motor 304 rotates in the opposite direction to retract and reset the stop rod 307. As the push rod 309 moves downward, it pushes out the cage so that it falls onto the conveyor belt 400.

[0062] After the conveyor retainer is moved, the fourth telescopic element 401 is reset so that the conveyor belt 400 is reset. At the same time, the second telescopic element 314 is reset. At this time, the elastic force of the third spring 310 acts on the push rod 309 so that the push rod 309 is reset. The third telescopic element 316 is controlled to extend so that the mold column 300 is reset and inserted into the inner ring 105.

[0063] The first telescopic element 220 is reset, which drives the turntable 217 to reset and rotate. At this time, the elastic force of the second spring 214 drives the connecting block 205 to reset and move, so that the side mold 202 moves. During the reset process of the turntable 217, the insertion rod 201 is reset. During the reset process of the insertion rod 201, the protrusion 212 gradually disengages from the sleeve 211. At this time, the elastic force of the first spring 208 acts on the connecting plate 204, so that the side mold 202 moves to both sides. At the same time, the insertion rod 201 continues to move, so that the core mold 200 moves between the two side molds 202.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precision injection molding device for demolding nylon retainers, characterized in that, include, The outer mold unit includes a mounting ring (103) and an inner ring (105) mounted on the inner ring of the mounting ring (103). The mounting ring (103) has a mounting groove (104). A mold mechanism is provided inside the mounting groove (104). The mold mechanism includes a core mold (200) and a side mold (202). The mold mechanism also includes a telescopic component. The telescopic component drives the side mold (202) to move so that they can be joined together. The inner mold unit includes a mold column (300), the bottom of which is provided with a crossbar mechanism, the crossbar mechanism including a stop bar (307) and a drive assembly, the drive assembly driving the stop bar (307) to extend to hook up the retainer; The mold column (300) moves downward and forms a mold cavity with the inner ring (105), the core mold (200) and the side mold (202), and the mold cavity is injection molded to form a nylon retainer.

2. The precision demolding injection molding device for nylon retainers according to claim 1, characterized in that, The telescopic assembly includes a connecting block (205), with fixed plates (206) fixedly installed on both sides of the connecting block (205), and a sliding rod (207) fixedly installed between the two fixed plates (206). A support plate (209) is installed in the middle of the sliding rod (207). The telescopic assembly also includes a connecting plate (204), which is movably sleeved on the sliding rod (207). A connecting rod (203) is fixedly installed on one side of the connecting plate (204), and the connecting rod (203) is fixedly connected to the side mold (202).

3. The precision demolding injection molding device for nylon retainers according to claim 2, characterized in that, A rod (201) is fixedly installed on one side of the core mold (200). The mold mechanism also includes an elastic moving component. The elastic moving component includes a sleeve (211) movably sleeved on the rod (201). Pull rods (210) are rotatably installed on both sides of the sleeve (211). One end of the pull rod (210) is rotatably connected to the connecting plate (204). Protrusions (212) are fixedly installed on both sides of the rod (201). When the rod (201) moves, it abuts against the sleeve (211) through the protrusions (212). The elastic moving component also includes a first spring (208) movably sleeved on the slide rod (207).

4. The precision demolding injection molding device for nylon retainers according to claim 3, characterized in that, The mold mechanism also includes a reset assembly, which includes a support block (215). The support block (215) is fixedly installed on the inner wall of the mounting groove (104) of the mounting ring (103). A support rod (213) is movably inserted into one side of the support block (215). The other end of the support rod (213) is fixedly installed on the connecting block (205). A second spring (214) is movably sleeved on the support rod (213). The insertion rod (201) movably passes through the support block (215) and extends to the other side.

5. The precision demolding injection molding device for nylon retainers according to claim 4, characterized in that, The outer mold unit also includes a first guide mechanism, which includes a turntable (217). The turntable (217) is rotatably mounted on the outside of the mounting ring (103). A first guide groove (218) is provided on the turntable (217). A first guide rod (216) is fixedly mounted on one end of the insertion rod (201). The first guide rod (216) is adapted to the first guide groove (218). A fixing block (102) is fixedly mounted on the outside of the mounting ring (103). A fixing ring (101) is fixedly mounted on the outside of the fixing block (102).

6. The precision demolding injection molding device for nylon retainers according to claim 5, characterized in that, The base (100) is installed at the bottom of the fixed ring (101). A pushing mechanism is provided on the base (100). The pushing mechanism is used to drive the turntable (217) to rotate. The driving mechanism includes a first telescopic element (220) installed on the top of the base (100). A connecting frame (219) is rotatably installed at the output end of the first telescopic element (220). One end of the connecting frame (219) is rotatably connected to the turntable (217).

7. The precision demolding injection molding device for nylon retainers according to claim 1, characterized in that, The mold column (300) is provided with a second guide mechanism. The second guide mechanism includes an inner rotating column (301) rotatably installed in the mold column (300). The bottom of the inner rotating column (301) is provided with a second guide groove (305). A second guide rod (306) is adapted to be connected in the second guide groove (305). The second guide rod (306) is fixedly connected to one end of a stop rod (307). The stop rod (307) moves through the mold column (300). When the inner rotating column (301) rotates, the movement of the stop rod (307) is controlled by the second guide rod (306) and the second guide groove (305).

8. The precision demolding injection molding device for nylon retainers according to claim 1, characterized in that, The drive assembly includes a motor (304) fixedly installed on one side of the mold column (300), a second gear (303) fixedly installed on the output end of the motor (304), a first gear (302) meshing with one side of the second gear (303), and the first gear (302) fixedly connected to the inner rotating column (301). A fastener (315) is fixedly installed on the side of the mold column (300), and a third telescopic element (316) is installed on the top of the fastener (315).

9. The precision demolding injection molding device for nylon retainers according to claim 1, characterized in that, The inner mold unit also includes an ejection mechanism, which includes a push rod (309) movably inserted into the mold column (300). A third guide rod (311) is fixedly installed on the top of the push rod (309). An annular groove (308) is provided on the mold column (300). A third spring (310) is movably sleeved on the part of the push rod (309) located in the annular groove (308). A sleeve ring (312) is movably sleeved on the outside of the annular groove (308). A third guide groove (313) is provided on the sleeve ring (312). The third guide groove (313) is adapted to the third guide rod (311). A second telescopic element (314) is installed on the side of the mold column (300). The output end of the second telescopic element (314) is fixedly connected to the sleeve ring (312).

10. The precision demolding injection molding device for nylon retainers according to claim 1, characterized in that, It also includes a conveyor belt (400), on one side of which a fourth telescopic element (401) is installed. The fourth telescopic element (401) drives the conveyor belt (400) to move between the outer mold unit and the inner mold unit to transport the retainer.

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