A special fixture for injection molding of spectacles
Patent Information
- Application Number
- CN202522311277.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
然而，在眼镜注塑成型生产中，因眼镜款式多样，对应注塑模具数量众多，为实现模具施压锁紧，常规做法是利用限位钢丝绳对模具外部进行锁紧，此方式虽适配性较好，能应对不同模具外形，但现有基于限位钢丝绳的锁紧机构，多通过棘轮机构限位，受棘轮齿牙数量限制，难以将限位钢丝绳完全锁紧拉直，模具易因锁紧力不足出现缝隙，影响注塑成型精度与产品质量，因此，针对上述问题提出一种眼镜注塑成型专用夹具
本实用新型中，通过设置的调节拉紧机构、联动拉紧机构与转轮机构，转动操作摇臂带动转轮主体初步调整钢丝绳长度，限位螺帽与限位槽配合实现初步限位，转动调节螺杆，推动头推动推动块，使联动拉紧机构沿导向滑轨移动，主动斜块与带槽斜向配合块协同，让上转动轮、前转动轮协同施力，有效分散钢丝绳拉力并完全锁紧拉直，解决了现有锁紧机构因棘轮齿牙限制，克服了传统棘轮机构限位不足的缺陷，避免模具因锁紧力不足出现缝隙，保障了眼镜注塑成型精度与产品质量。
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Figure CN224796275U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of eyeglasses manufacturing technology, specifically to a special fixture for injection molding of eyeglasses. Background Technology
[0002] Eyeglasses injection molding fixtures are specialized tooling equipment used in the injection molding process of eyeglasses production. Their core function is to precisely fix the molds of eyeglass frames, temples and other components during injection molding, ensuring the stability of the mold position during the injection process and avoiding dimensional deviations in key parts such as lens slots and pin holes due to displacement, thus ensuring molding accuracy. However, in the injection molding production of eyeglasses, due to the variety of eyeglass styles and the large number of corresponding injection molds, the conventional method to achieve mold pressure locking is to use a limiting steel wire rope to lock the outside of the mold. Although this method has good adaptability and can cope with different mold shapes, existing locking mechanisms based on limiting steel wire ropes mostly use ratchet mechanisms for limiting. Due to the limitation of the number of ratchet teeth, it is difficult to completely lock and straighten the limiting steel wire rope. The mold is prone to gaps due to insufficient locking force, which affects the injection molding accuracy and product quality. Therefore, a special fixture for eyeglass injection molding is proposed to address the above problems. Utility Model Content
[0003] The purpose of this utility model is to provide a special fixture for injection molding of eyeglasses to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A special fixture for injection molding of eyeglasses includes a support box. An adjusting tensioning mechanism is fixedly installed on the outer side of the support box. A rotating wheel mechanism rotates inside the support box, and a steel wire rope is wound around the surface of the rotating wheel mechanism. The adjusting tensioning mechanism includes a base, a guide rail fixedly installed on the inner side of the base, a grooved oblique mating block fixedly connected to the top of the guide rail, and a linkage tensioning mechanism slidably connected to the inner side of the guide rail. An adjusting screw is installed below the linkage tensioning mechanism, and a push head is fixedly connected to one end of the adjusting screw. The linkage tensioning mechanism includes a linkage main frame, a front rotating wheel rotatably connected to the front end of the linkage main frame, a sliding frame slidably connected to the top of the inner side of the linkage main frame, an upper rotating wheel rotatably connected to the inner side of the sliding frame, an active inclined block fixedly connected to the rear end of the sliding frame, an anti-detachment block fixedly connected to the inclined surface of the active inclined block, and a push block fixedly connected to the bottom end of the linkage main frame. The active inclined block and the grooved oblique mating block are slidably connected, and the push block and the push head are slidably engaged.
[0005] As a further optimization of this utility model, the front rotating wheel is located in front of the upper rotating wheel, the upper rotating wheel is located above the front rotating wheel, and the wire rope rotates in coordination with the front rotating wheel and the upper rotating wheel.
[0006] As a further optimization of this utility model, the sliding frame and the linkage main frame are parallel to each other, the upper surface of the anti-detachment block and the upper surface of the sliding frame are at the same horizontal height, the cross-sectional shape of the anti-detachment block is dovetail-shaped, and the anti-detachment block is internally slidably connected to the grooved oblique mating block.
[0007] As a further optimization of this utility model, the rotating wheel mechanism includes a rotating wheel body, which is rotatably disposed at the center inside the support box via a connecting shaft. A connecting seat is fixedly connected to the front end face of the rotating wheel body, and an operating rocker arm is hinged to the inner side of the connecting seat. The operating rocker arm extends to the outside of the support box, and a limiting nut is screwed to the top of the operating rocker arm. The limiting nut is located above the limiting groove.
[0008] As a further optimization of this utility model, the support box has a sliding cavity at the center of its top for cooperating with a steel wire rope. The sliding cavity is connected to the support box, and there is a gap between the steel wire rope and the sliding cavity. One end of the steel wire rope is fixedly connected to the interior of the main body of the rotating wheel, and the other end of the steel wire rope is fixedly connected to the bottom of the support box.
[0009] As a further optimization of this utility model, the front end of the support box is provided with a circular array of limiting grooves, the width of which is adapted to the diameter of the operating rocker arm, and the inner side of the limiting groove is an arc-shaped structure.
[0010] As a further optimization of this utility model, the center of the push head and the center of the adjusting screw are located on the same central axis. The outer side of the push head has an arc-shaped structure. The adjusting screw and the push head are both located below the push block, which also has an arc-shaped structure. A sliding groove for cooperating with the rotation of the push head is provided on one side of the top of the support box. A screw adapter seat is fixedly connected to one side of the top of the support box, and the screw adapter seat is helically connected to the adjusting screw.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, through the setting of an adjusting tensioning mechanism, a linkage tensioning mechanism, and a rotating wheel mechanism, the rotating operating rocker arm drives the rotating wheel body to initially adjust the length of the steel wire rope. The limiting nut and the limiting groove cooperate to achieve initial limiting. Rotating the adjusting screw pushes the pushing block, causing the linkage tensioning mechanism to move along the guide rail. The active inclined block and the grooved inclined cooperation block work together to allow the upper rotating wheel and the front rotating wheel to work together to apply force, effectively dispersing the tension of the steel wire rope and completely locking and straightening it. This solves the problem of the limitation of the ratchet teeth in the existing locking mechanism, overcomes the defect of insufficient limiting of the traditional ratchet mechanism, avoids gaps in the mold due to insufficient locking force, and ensures the injection molding accuracy and product quality of the glasses. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the tensioning adjustment mechanism of this utility model; Figure 3 This utility model Figure 2 A schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of the push head of this utility model; Figure 5 This is an exploded view of the support box of this utility model; Figure 6 This is one of the structural schematic diagrams of the linkage tensioning mechanism of this utility model; Figure 7 This is the second structural schematic diagram of the linkage tensioning mechanism of this utility model; Figure 8 This is the third structural schematic diagram of the linkage tensioning mechanism of this utility model.
[0013] In the diagram: 1. Support box; 21. Adjustable tensioning mechanism; 22. Base; 23. Guide slide rail; 24. Grooved oblique mating block; 24. Linkage tensioning mechanism; 241. Linkage main frame; 242. Front rotating wheel; 243. Sliding frame; 244. Upper rotating wheel; 245. Active inclined block; 246. Anti-detachment block; 247. Pushing block; 25. Adjusting screw; 26. Push head; 27. Screw adapter seat; 3. Rotary wheel mechanism; 31. Rotary wheel body; 32. Connecting seat; 33. Operating rocker arm; 34. Limit nut; 4. Steel wire rope; 5. Limiting groove; 6. Sliding cavity; 7. Sliding groove. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0016] Please see Figures 1-8 This utility model provides a technical solution: A special fixture for injection molding of eyeglasses includes a support box 1. An adjusting tensioning mechanism 2 is fixedly installed on the outside of the support box 1. A rotating wheel mechanism 3 rotates inside the support box 1, and a steel wire rope 4 is wound around the surface of the rotating wheel mechanism 3. The adjusting tensioning mechanism 2 includes a base 21. A guide rail 22 is fixedly installed on the inner side of the base 21. A grooved oblique mating block 23 is fixedly connected to the top of the guide rail 22. A linkage tensioning mechanism 24 is slidably connected to the inner side of the guide rail 22. An adjusting screw 25 is installed below the linkage tensioning mechanism 24, and a push head 26 is fixedly connected to one end of the adjusting screw 25. The tensioning mechanism 24 includes a linkage main frame 241, a front rotating wheel 242 rotatably connected to the front end of the linkage main frame 241, a sliding frame 243 slidably connected to the top of the inner side of the linkage main frame 241, an upper rotating wheel 244 rotatably connected to the inner side of the sliding frame 243, an active inclined block 245 fixedly connected to the rear end of the sliding frame 243, an anti-detachment block 246 fixedly connected to the inclined surface of the active inclined block 245, and a push block 247 fixedly connected to the bottom end of the linkage main frame 241; the active inclined block 245 is slidably connected to the grooved inclined mating block 23, and the push block 247 is slidably mated to the push head 26.
[0017] As a further implementation of this scheme, the front rotating wheel 242 is located in front of the upper rotating wheel 244, and the upper rotating wheel 244 is located above the front rotating wheel 242. The wire rope 4 rotates in cooperation with the front rotating wheel 242 and the upper rotating wheel 244. This cooperation method can effectively disperse the tension on the wire rope 4, reduce its local wear, and better coordinate the force during subsequent tensioning adjustments to ensure the locking effect on the mold. As a further implementation of this solution, the sliding frame 243 and the linkage main frame 241 are parallel to each other, the upper surface of the anti-detachment block 246 is at the same horizontal height as the upper surface of the sliding frame 243, the cross-sectional shape of the anti-detachment block 246 is dovetail-shaped, and the anti-detachment block 246 is internally slidably connected to the grooved inclined mating block 23. The dovetail-shaped structure of the anti-detachment block 246 and the internal sliding connection of the grooved inclined mating block 23 can prevent the active inclined block 245 from detaching during the force process, ensure that the components of the linkage tensioning mechanism 24 are tightly fitted, avoid tensioning failure due to loosening, and improve the reliability of the overall structure. As a further implementation of this solution, the center of the push head 26 and the center of the adjusting screw 25 are located on the same central axis. The outer side of the push head 26 has an arc-shaped structure. The adjusting screw 25 and the push head 26 are both located below the push block 247, which also has an arc-shaped structure. A sliding groove 7 for cooperating with the rotation of the push head 26 is provided on one side of the top of the support box 1. A screw adapter seat 27 is fixedly connected to one side of the top of the support box 1. The screw adapter seat 27 is screwed to the adjusting screw 25. The sliding groove 7 provides space for the movement of the push head 26. As a further implementation of this solution, the rotating wheel mechanism 3 includes a rotating wheel body 31. The rotating wheel body 31 is rotatably mounted at the center inside the support box 1 via a connecting shaft. A connecting seat 32 is fixedly connected to the front end face of the rotating wheel body 31. An operating rocker arm 33 is hinged to the inner side of the connecting seat 32. The operating rocker arm 33 extends to the outside of the support box 1. A limit nut 34 is screwed to the top of the operating rocker arm 33. The limit nut 34 is located above the limit groove 5. The cooperation between the limit nut 34 and the limit groove 5 can securely limit the operating rocker arm 33 after initial adjustment, so that the rotating wheel body 31 maintains the current state of the wire rope 4, preventing the wire rope 4 from slipping accidentally in subsequent operations, and providing a stable basis for subsequent precise adjustment. As a further implementation of this solution, a sliding cavity 6 for cooperating with the wire rope 4 is opened in the middle of the top of the support box 1. The sliding cavity 6 is connected to the support box 1, and there is a gap between the wire rope 4 and the sliding cavity 6. One end of the wire rope 4 is fixedly connected to the inside of the rotating wheel body 31, and the other end of the wire rope 4 is fixedly connected to the bottom of the support box 1. The fixing method of the two ends of the wire rope 4 ensures that the connection is stable during the winding and tightening process, and there will be no loosening, thus ensuring the normal operation of the clamp. As a further implementation of this solution, the front end of the support box 1 is provided with a circular array of limiting grooves 5. The width of the limiting grooves 5 is adapted to the diameter of the operating rocker arm 33. The inner side of the limiting grooves 5 is an arc-shaped structure. The arc-shaped inner structure makes the contact between the operating rocker arm 33 and the limiting groove 5 more compact after it is inserted into the limiting groove, which enhances the limiting effect, prevents the operating rocker arm 33 from accidentally slipping out during operation, and ensures the stability of the rotary wheel mechanism 3 after initial limiting.
[0018] Work process: Fix one end of the steel wire rope 4 inside the main body 31 of the rotating wheel mechanism 3, and connect the other end from the front rotating wheel 242 of the adjusting tensioning mechanism 2 along the path, pass over the upper rotating wheel 244, and then put it onto the eyeglass injection mold to be locked. At this time, all parts are in the initial assembly state, preparing for the mold locking operation. The operator rotates the connecting seat 32 and the operating rocker arm 33. The connecting seat 32 drives the rotating wheel body 31 to rotate at the center inside the support box 1. During the rotation of the rotating wheel body 31, the wire rope 4 is wound, stored, or released, thereby initially adjusting the length of the wire rope 4. When the operating rocker arm 33 rotates to the corresponding appropriate limit groove 5 position, it is pushed into the limit groove 5. By rotating the limit nut 34, its bottom end is pressed against the support box 1 to limit the movement, making it difficult for the operating rocker arm 33 to disengage from the limit groove 5. This keeps the rotating wheel body 31 in the current state of wire rope 4 being wound and released, thus achieving initial limiting. Next, the operator rotates the adjusting screw 25. Because the adjusting screw 25 is screwed to the screw adapter seat 27, when the adjusting screw 25 is rotated, the pushing head 26 moves axially with the adjusting screw 25. The outer side of the pushing head 26 has an arc-shaped structure, and its center is collinear with the center of the adjusting screw 25. During the movement, it slides with the pushing block 247 and pushes the pushing block 247 upward. Since the pushing block 247 is fixedly connected to the bottom end of the linkage main frame 241, the movement of the pushing block 247 drives the linkage main frame 241 to slide upward along the guide rail 22. The guide rail 22 provides stable guidance for the movement of the linkage main frame 241, ensuring its precise movement direction. During the upward movement of the linkage main frame 241, the active inclined block 245 moves upward synchronously. The active inclined block 245 is slidably connected to the inner inclined surface of the grooved inclined mating block 23. When moving upward, the inclined surface mating generates a horizontal component force, pushing the sliding frame 243 to move forward horizontally. At the same time, the anti-detachment block 246 is slidably connected to the inside of the grooved inclined mating block 23 to prevent the active inclined block 245 from detaching from the grooved inclined mating block 23, thus ensuring linkage stability. The sliding frame 243 moves forward, driving the upper rotating wheel 244 to move forward synchronously. The front rotating wheel 242 moves upward with the linkage main frame 241, and the front rotating wheel 242 is located in front of the upper rotating wheel 244. The two work together to clamp the steel wire rope 4. The forward movement of the upper rotating wheel 244 and the upward movement of the front rotating wheel 242 work together to further tighten the steel wire rope 4 sleeved on the mold until the steel wire rope 4 is completely locked and straightened, thus achieving reliable locking of the eyeglass injection mold and ensuring the stability of the mold during the injection molding process.
[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A special fixture for injection molding of eyeglasses, comprising a support box (1), characterized in that: An adjusting tensioning mechanism (2) is fixedly installed on the outside of the support box (1), and a rotating wheel mechanism (3) is rotated inside the support box (1). A steel wire rope (4) is wound around the surface of the rotating wheel mechanism (3). The adjusting tensioning mechanism (2) includes a base (21), a guide slide rail (22) is fixed on the inner side of the base (21), a grooved oblique mating block (23) is fixedly connected to the top of the guide slide rail (22), a linkage tensioning mechanism (24) is slidably connected to the inner side of the guide slide rail (22), an adjusting screw (25) is installed below the linkage tensioning mechanism (24), and a push head (26) is fixedly connected to one end of the adjusting screw (25). The linkage tensioning mechanism (24) includes a linkage main frame (241), a front rotating wheel (242) is rotatably connected to the front end of the linkage main frame (241), a sliding frame (243) is slidably connected to the top of the inner side of the linkage main frame (241), an upper rotating wheel (244) is rotatably connected to the inner side of the sliding frame (243), an active inclined block (245) is fixedly connected to the rear end of the sliding frame (243), an anti-detachment block (246) is fixedly connected to the inclined surface of the active inclined block (245), and a push block (247) is fixedly connected to the bottom end of the linkage main frame (241). The active inclined block (245) is slidably connected to the grooved inclined mating block (23), and the pushing block (247) is slidably mated to the pushing head (26).
2. The special fixture for injection molding of eyeglasses according to claim 1, characterized in that: The front rotating wheel (242) is located in front of the upper rotating wheel (244), and the upper rotating wheel (244) is located above the front rotating wheel (242). The wire rope (4) rotates in coordination with the front rotating wheel (242) and the upper rotating wheel (244).
3. The special fixture for injection molding of eyeglasses according to claim 1, characterized in that: The sliding frame (243) and the linkage main frame (241) are parallel to each other. The upper surface of the anti-detachment block (246) and the upper surface of the sliding frame (243) are at the same horizontal height. The cross-sectional shape of the anti-detachment block (246) is dovetail-shaped. The anti-detachment block (246) is internally slidably connected to the grooved oblique mating block (23).
4. The special fixture for injection molding of eyeglasses according to claim 1, characterized in that: The rotating wheel mechanism (3) includes a rotating wheel body (31), which is rotatably disposed at the center inside the support box (1) via a connecting shaft. A connecting seat (32) is fixedly connected to the front end face of the rotating wheel body (31). An operating rocker arm (33) is hinged to the inner side of the connecting seat (32). The operating rocker arm (33) extends to the outside of the support box (1). A limiting nut (34) is spirally connected to the top of the operating rocker arm (33). The limiting nut (34) is located above the limiting groove (5).
5. A special fixture for injection molding of eyeglasses according to claim 4, characterized in that: The top of the support box (1) has a sliding cavity (6) for cooperating with the wire rope (4). The sliding cavity (6) is connected to the support box (1). There is a gap between the wire rope (4) and the sliding cavity (6). One end of the wire rope (4) is fixedly connected to the inside of the wheel body (31), and the other end of the wire rope (4) is fixedly connected to the bottom of the support box (1).
6. A special fixture for injection molding of eyeglasses according to claim 4, characterized in that: The front end of the support box (1) is provided with a circular array of limiting grooves (5). The width of the limiting grooves (5) is adapted to the diameter of the operating rocker arm (33). The inner side of the limiting grooves (5) is an arc-shaped structure.
7. A special fixture for injection molding of eyeglasses according to claim 1, characterized in that: The center of the push head (26) and the center of the adjusting screw (25) are on the same central axis. The outer side of the push head (26) has an arc-shaped structure. The adjusting screw (25) and the push head (26) are both located below the push block (247). The push block (247) has an arc-shaped structure. A sliding groove (7) for cooperating with the rotation of the push head (26) is provided on one side of the top of the support box (1). A screw adapter seat (27) is fixedly connected to one side of the top of the support box (1). The screw adapter seat (27) is spirally connected to the adjusting screw (25).