Special-shaped three-dimensional flat needle TR glasses leg forming die

Abstract

The utility model relates to the field of glasses manufacturing technology, concretely is a kind of special-shaped three-dimensional flat needle TR glasses leg forming die, including TR base material and special-shaped three-dimensional flat needle, special-shaped three-dimensional flat needle is integrated with TR base material by compression injection molding process, the shape of special-shaped three-dimensional flat needle is compatible with the shape of glasses leg, can be designed and manufactured according to the arbitrary foot type of glasses leg, and glasses leg can be according to different person head type width, camber and be adjusted camber camber. The utility model is provided with "TR base material" (flexible cladding layer), realizes and forms " wrapping + sticking " double fixation with flat needle, eliminates clearance and avoids loose shake, and the effect of reducing skin friction by means of soft texture, adapting to different head type by deformation, by setting " first mould tail end detent protrusion / groove "(positioning structure), realizes to establish predetermined position reference, resists second mould high pressure injection impact force, avoids running position, needle deviation, ensures the effect that flat needle is in preset position.

Description

Technical Field

[0001] This utility model relates to the field of eyeglasses manufacturing technology, specifically to a mold for forming irregularly shaped three-dimensional flat needle TR eyeglass temples. Background Technology

[0002] In the current eyewear manufacturing industry, the temple structure of sunglasses and optical glasses is mostly manufactured using traditional pin insertion technology. Under traditional technology, ordinary flat pins have significant drawbacks such as monotonous patterns and simple shapes. The temple ends are small and round, and they deform after long-term wear, making it difficult to meet consumers' increasingly diverse and personalized demands for the appearance of eyewear.

[0003] In the existing technology, there are two main processing methods for temple inserts on eyeglasses: one is the hard heating insert method, which is not only cumbersome to operate, but also prone to damage to the insert and the base material of the temple during the heating process, affecting the stability of product quality; the other is the hot insert method during injection molding. Although this method simplifies the process to a certain extent, it still cannot overcome the limitations of traditional insert technology. For cases where the temple has a curved shape that is large at both ends and thin in the middle, it is difficult to achieve effective composite processing, resulting in insufficient aesthetics and lack of three-dimensionality of the temple shape. After wearing it for a long time, the temple end will deform, and the glasses will easily slip off, requiring readjustment. It cannot completely change the drawbacks of traditional technology.

[0004] Meanwhile, there is a high market demand for irregularly shaped eyeglass temples, and consumer feedback has been positive. However, existing technologies for manufacturing irregularly shaped eyeglass temples mainly rely on pin-pulling and injection processes, which have several problems: First, the pin-pulling and injection processes are costly and have a very high product scrap rate during production, which directly leads to high selling prices for irregularly shaped eyeglass temples, putting enormous pressure on consumers and only meeting the needs of a small segment of high-end consumers, thus limiting the product's market penetration. Second, pins produced by the pin-pulling process are prone to misalignment and deviation during processing, affecting product precision.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a mold for forming irregular three-dimensional flat needle TR eyeglass temples, which solves the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides a molding die for irregularly shaped three-dimensional flat pin TR eyeglass temples, comprising a die divided into two groups. The die's specific structure includes: a positioning structure located at the tail end of the first die for positioning the flat pin during the production of the irregularly shaped three-dimensional flat pin in the second die; a groove structure formed within the first die, the groove structure occupying two-thirds of the volume of the irregularly shaped three-dimensional flat pin accessory and adapted to the size and shape of the accessory; and a venting structure located at the tail end of the die for venting air from the die during injection molding.

[0010] Optionally, the exhaust structure is an exhaust hole with a diameter of 0.4 to 0.5 mm.

[0011] Optionally, the positioning structure is a positioning protrusion or a positioning groove. The positioning protrusion can form a positioning groove on the TR substrate blank, and the positioning groove can fit into the end of the irregular three-dimensional flat needle.

[0012] Optionally, the groove structure is provided with an irregular three-dimensional flat needle, which is integrally formed with the TR substrate by injection molding process.

[0013] Optionally, the shape of the irregular three-dimensional flat needle is adapted to the shape of the temple of the eyeglasses, and it can be designed and manufactured according to any foot shape of the temple of the eyeglasses. Moreover, the temple of the eyeglasses can be adjusted according to the width and curvature of different head shapes.

[0014] Optionally, the irregularly shaped three-dimensional flat needle is made of stainless steel or titanium alloy.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a mold for forming irregular three-dimensional flat needle TR eyeglass temples, which has the following beneficial effects:

[0017] 1. This utility model achieves a double fixation of "wrapping + fitting" with the flat needle by setting "TR substrate" (flexible covering layer), eliminating gaps and preventing loosening and shaking, and reducing skin friction with the help of soft texture and adapting to different head shapes through deformation.

[0018] 2. This utility model achieves the effect of establishing a pre-positioning benchmark by setting a "first mold tail end locking protrusion / groove" (positioning structure), resisting the impact of high pressure injection of the second mold, avoiding flat needle displacement and deviation, and ensuring that the flat needle is in the preset position.

[0019] 3. This utility model is equipped with a "first in-mold adaptable groove" (groove structure, the volume of which is two-thirds of the volume of the flat needle and the shape is adapted to the flat needle), which realizes the precise placement of the flat needle to avoid positional deviation, and ensures that there is no gap between the flat needle and the TR blank, the force is evenly transmitted, and the flat needle is prevented from being deformed by local force. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the mold structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the irregular three-dimensional flat needle structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the irregular three-dimensional flat needle of this utility model from another perspective;

[0024] Figure 5 For the present utility model Figure 1 Enlarged structural diagram at point A;

[0025] Figure 6 This is a schematic diagram of the overall structure of this utility model.

[0026] In the diagram: 1. Mold; 2. Irregularly shaped three-dimensional flat needle; 3. Venting structure; 4. Locking protrusion; 5. Locking groove. Detailed Implementation

[0027] 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.

[0028] Example: Please refer to Figures 1 to 6 According to an embodiment of the present invention, a technical solution is provided: a mold for forming the temple of glasses with irregular three-dimensional flat needles (TR), including a TR substrate and irregular three-dimensional flat needles 2. The irregular three-dimensional flat needles 2 and the TR substrate are integrated by injection molding. The shape of the irregular three-dimensional flat needles 2 is adapted to the shape of the temple of glasses. It can be designed and manufactured according to any temple shape of glasses, and the temple of glasses can be adjusted according to the width and curvature of different head shapes.

[0029] Using the TR substrate with the above-described structure, traditional pin-type temples are prone to misalignment or loose bonding with the substrate, leading to looseness and wobbling during wear. In this solution, the irregularly shaped three-dimensional flat pin 2 is positioned and tightly bonded to the TR substrate by the mold 1. During high-pressure injection molding, the flat pin remains fixed and does not shift, resulting in a robust composite structure. Regardless of head size, the temples maintain a stable fit, preventing slippage due to structural loosening and resolving the "unstable fit" defect of traditional products. Furthermore, the TR substrate itself is soft, avoiding harsh friction against the skin and eliminating the discomfort associated with traditional hard plastic or metal temples. Moreover, the elasticity of the irregularly shaped three-dimensional flat pin 2 complements the flexibility of the TR substrate. This design allows the temples of the glasses to have appropriate deformation capabilities. When facing different head shapes, the temples can conform to the head contour through slight deformation, avoiding both pressure marks caused by being too tight and wobbling caused by being too loose, thus achieving the effect of "no deformation even after long-term wear". Compared with the problems of "easy needle misalignment, high scrap rate and high cost" of existing needle-pulling and injection molding processes, this technical solution effectively solves the problems of flat needle misalignment and product fogging through mold 1 positioning (first mold tail end locking structure) and secondary injection molding venting design. At the same time, there is no need to add additional needle-pulling machines or other equipment, and production can be achieved directly through the existing injection mold 1, reducing equipment investment. Moreover, the accessories do not need to be lengthened and can be made directly according to the temple shape, further reducing material costs and making it possible for large-scale mass production of the product.

[0030] The temple shape of eyeglasses includes a curved shape that is large at both ends and narrow in the middle.

[0031] Compared to traditional uniformly sized temples, the curved design, which is wider at both ends and narrower in the middle, achieves precise pressure distribution through a gradual change in size. The larger section at the front, which connects to the frame, distributes the weight of the frame over a wider contact area, preventing excessive local pressure that could cause soreness on the sides of the nose or temples. Similarly, the larger section at the back, which fits behind the ears, increases the contact area and distributes the support of the temples to the skin behind the ears, reducing pressure marks caused by long-term pressure.

[0032] In this embodiment, mold 1 is divided into two groups, and the specific structure includes:

[0033] The positioning structure is located at the tail end of the first mold and is used to position the flat needle 2 when it is placed in the second mold during production. The groove structure is formed in the first mold. The volume of the groove structure accounts for two-thirds of the volume of the irregular three-dimensional flat needle 2 accessory and is adapted to the size and shape of the irregular three-dimensional flat needle 2 accessory. The venting structure 3 is located at the tail end of the mold 1 and is used to vent the air in the mold 1 during the injection molding process. The positioning structure is a locking protrusion 4 or a locking groove 5. The locking protrusion 4 can form a locking groove on the TR substrate blank. The locking groove 5 can fit into the end of the irregular three-dimensional flat needle 2. The venting structure 3 is a venting hole with a diameter of 0.4 to 0.5 mm.

[0034] The groove volume is two-thirds the volume of the flat needle, ensuring close contact between two-thirds of the flat needle's surface and the TR substrate preform formed in the first mold. During the high-pressure injection molding in the second mold, the newly injected TR material covers the remaining one-third of the flat needle's surface and fuses with the preform's TR material, forming a double-fixing structure of "wrapping + fitting," preventing the TR material from separating from the flat needle during long-term wear and bending. A locking protrusion 4 is provided at the end of the first mold, which matches the locking groove at the end of the irregularly shaped three-dimensional flat needle 2 to achieve flat needle positioning. The groove structure in the first mold has a depth of 2mm, and its width varies with the shape of the flat needle. The change gradually increases from 1.8mm to 3.2mm. The volume of the groove is precisely controlled to be two-thirds of the volume of the irregular three-dimensional flat needle 2. Two vent holes with a diameter of 0.5mm are set at the tail of the mold 1. The vent holes are connected to the cavity of the mold 1, and the channels are inclined at 45° to facilitate the smooth discharge of air and avoid fogging of the product due to poor venting. The perfect fit between the groove and the shape of the flat needle allows all parts of the flat needle to be in close contact with the TR material during the molding process. When the temples of the glasses are worn, the pressure of the head on the temples can be evenly transmitted to the flat needle through the TR material, avoiding bending deformation caused by localized stress concentration on the flat needle.

[0035] In this embodiment, the injection molding process for the irregularly shaped three-dimensional flat needle 2TR eyeglass temple includes the following steps:

[0036] S1. First mold processing: Assemble mold 1 into the first mold state, inject TR material into the first mold to form a TR substrate blank with a groove structure, and reserve a flat needle placement position at the positioning structure. Then remove the TR substrate blank.

[0037] S2. Placing the flat needle: The irregular three-dimensional flat needle 2 is placed into the groove structure of the TR substrate blank, and the irregular three-dimensional flat needle 2 is positioned by the positioning structure.

[0038] S3. Second mold processing: Place the TR substrate blank with the flat needles in mold 1 and assemble it into the second mold state. Inject TR material into the second mold through high pressure injection, so that the TR material fills the groove structure and covers the irregular three-dimensional flat needles 2. At the same time, the air in the mold 1 is discharged through the exhaust structure 3. After the TR material cools and solidifies, take out the molded eyeglass temples.

[0039] S4. Post-processing: The formed temples of the glasses are ground, polished or chamfered, and cleaned to obtain the finished product.

[0040] The irregular three-dimensional flat needle 2 is made of stainless steel or titanium alloy.

[0041] The TR substrate preform formed in the first mold has a groove structure that matches the flat needle, and a precise placement position is reserved at the positioning structure. This provides a stable foundation for the subsequent precise positioning and composite molding of the flat needle, avoiding the inability to proceed smoothly in subsequent processes due to preform size deviations, and ensuring product molding accuracy from the source. With the guidance of the positioning structure and precise detection tools, even newly hired operators can quickly master the flat needle placement technique after simple training, reducing the operational error rate and minimizing product scrap due to human error. High-pressure injection and reasonable temperature parameters ensure that the newly injected TR material, the preform TR material, and the flat needle are tightly bonded to form a solid integral structure. During the second mold processing, the high pressure, combined with the exhaust structure 3, removes air from the cavity of mold 1, leaving no air residue between the TR material and the flat needle, and resulting in a cloud-free surface on the finished eyeglass temples. The appearance and quality of the glasses are significantly improved after grinding and polishing. The surface of the temples is smooth and flawless, greatly enhancing their aesthetics and meeting consumers' demands for high-quality glasses. The chamfering eliminates sharp edges, preventing skin scratches during wear and improving comfort, thus reducing consumer feedback on discomfort. After grinding and polishing, the temples are placed in an ultrasonic cleaner and cleaned for 3-5 minutes at 45-50℃ with a neutral cleaning agent (pH 7-8) to remove polishing residue, dust, and other impurities. They are then rinsed with deionized water and dried in a drying oven at 60-70℃ for 10-15 minutes. The ultrasonic cleaning and drying process thoroughly removes impurities and cleaning agent residue from the product surface, preventing impurities from corroding the TR material or flat needles, extending the product's lifespan, and ensuring that the product meets hygiene standards to avoid skin irritation.

[0042] Working principle:

[0043] The structure is coordinated, with stainless steel / titanium alloy irregular three-dimensional flat needle 2 as a rigid skeleton to withstand pressure and maintain shape, and TR substrate as a flexible covering layer. It is fixed by "wrapping + fitting" composite, and the shape with large ends and thin middle disperses pressure to achieve "self-adaptive fitting" and solve the problems of unstable wearing, discomfort and deformation.

[0044] With the assistance of mold 1, two sets of mold 1 ensure stable bonding between TR substrate and flat needle through positioning structure (establishing a pre-positioning benchmark to prevent flat needle displacement), groove structure (guiding fit + uniform force transmission), and exhaust structure 3 (directional exhaust to prevent fogging and burrs).

[0045] Through collaborative processes, the four-step injection molding process (first mold to establish composite benchmark, second mold for precise positioning, third mold for fusion and curing, and fourth mold for fine optimization) achieves precise product molding and improves performance and appearance by adjusting parameters and operating in a dust-free environment, meeting the needs of large-scale production and high quality.

[0046] 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 mold for forming irregularly shaped three-dimensional flat needle TR eyeglass temples, characterized in that, Includes a mold (1), which is divided into two groups, and its specific structure includes: The positioning structure is located at the tail end of the first mold and is used to position the flat needle when the irregular three-dimensional flat needle (2) is placed in the second mold. The groove structure is formed in the first mold, and the volume of the groove structure accounts for two-thirds of the volume of the irregular three-dimensional flat needle (2) accessory, and is adapted to the size and shape of the irregular three-dimensional flat needle (2) accessory; The venting structure (3) is located at the tail of the mold and is used to vent the air inside the mold during the injection molding process.

2. The irregular three-dimensional flat needle TR eyeglass temple forming mold according to claim 1, characterized in that, The exhaust structure (3) is an exhaust hole with a diameter of 0.4 to 0.5 mm.

3. The irregular three-dimensional flat needle TR eyeglass temple forming mold according to claim 1, characterized in that, The positioning structure is a positioning protrusion (4) or a positioning groove (5). The positioning protrusion (4) can form a positioning groove on the TR substrate blank, and the positioning groove (5) can fit into the end of the irregular three-dimensional flat needle (2).

4. The irregular three-dimensional flat needle TR eyeglass temple forming mold according to claim 1, characterized in that, The groove structure is provided with an irregular three-dimensional flat needle (2), and the irregular three-dimensional flat needle (2) and the TR substrate are integrated by injection molding process.

5. The irregular three-dimensional flat needle TR eyeglass temple forming mold according to claim 1, characterized in that, The shape of the irregular three-dimensional flat needle (2) is adapted to the shape of the temple of the eyeglasses. It can be designed and manufactured according to any foot shape of the temple of the eyeglasses, and the temple of the eyeglasses can be adjusted according to the width and curvature of different head shapes.

6. The irregular three-dimensional flat needle TR eyeglass temple forming mold according to claim 1, characterized in that, The irregular three-dimensional flat needle (2) is made of stainless steel or titanium alloy.

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