Method for manufacturing liquid silicone rubber temple pieces
By mixing and turning the rubber in a rubber mixing machine, combined with secondary vulcanization treatment, the problem of uneven mixing of oak particles in liquid silicone eyeglass temples was solved, resulting in cost reduction and improved texture.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGZHOU CHUANGTIAN CO LTD
- Filing Date
- 2023-03-17
- Publication Date
- 2026-06-26
AI Technical Summary
In the current process of manufacturing liquid silicone eyeglass temples, oak particles are difficult to mix evenly with liquid silicone, and expensive dispensing machines are required, resulting in high costs and uneven mixing.
After adding oak granules to liquid silicone, the mixture is stirred and turned using a rubber mixing machine to ensure uniform mixing. Then, it is vulcanized in a mold to avoid using a glue injection machine. A secondary vulcanization process is combined to ensure molding quality.
This technology enables the uniform mixing and molding of liquid silicone temples for eyeglasses, reducing equipment costs while retaining the environmental friendliness and texture of liquid silicone and enhancing the product's aesthetics.
Abstract
Description
Technical Field
[0001] This invention relates to the field of eyeglass manufacturing technology, and in particular to a method for manufacturing liquid silicone eyeglass temples. Background Technology
[0002] Eyeglass temples are an important component of eyeglasses, serving to support the lenses. As people's living standards improve, the comfort and quality of eyeglasses are receiving increasing attention. A type of eyeglasses has emerged on the market with temples made of silicone. Because silicone is lightweight and flexible, silicone temples exert less pressure on the ears, are more comfortable to wear, and will not deform due to bending. Silicone eyeglass frames can be made from either solid or liquid silicone.
[0003] The process of making eyeglass temples using solid silicone is as follows: The manufacturer puts solid silicone and vulcanizing agent into a rubber mixing mill to mix and obtain rubber material. Then, the rubber material is removed from the rubber mixing mill, flattened and cut into rubber strips suitable for the size of the mold cavity. The rubber strips and metal frame are put into the mold cavity and molded. The mold is closed, heated and pressurized to make the rubber material vulcanize and form to cover the metal frame. The finished eyeglass temples are then demolded.
[0004] The process of making eyeglass temples using liquid silicone is as follows: The manufacturer puts a metal bracket into the mold of the injection molding machine, then turns on the injection molding machine to mix the raw materials A and B of the liquid silicone to obtain a liquid mixed adhesive, which is then transported to the injection device of the injection molding machine. The injection device further mixes the mixed adhesive and then pushes it into the mold containing the metal bracket. The mixed adhesive undergoes a vulcanization reaction in the mold to form the finished eyeglass temple.
[0005] Liquid silicone is safer and more environmentally friendly than solid silicone. It is odorless, meets food-grade requirements, is less prone to yellowing, and has a better feel, making it more suitable as a material for eyeglass temples. However, the manufacturing process requires expensive injection molding machines, so the production cost is higher than that of solid silicone. Summary of the Invention
[0006] The purpose of this invention is to provide a method for manufacturing liquid silicone eyeglass temples, which can make eyeglass temples using liquid silicone material without the need for a glue injection machine, thereby reducing the equipment cost of making eyeglass temples with liquid silicone.
[0007] When manufacturing silicone eyeglass temples, oak particles can be added to the silicone raw material. After mixing, the mixture is used to prepare the eyeglass temples. For details, please refer to the inventor's patent application CN202110729376.6. The thermal conductivity of oak ensures that the wearing temperature of the eyeglass temples will not change significantly due to the external temperature. It can maintain a suitable wearing temperature in hot or cold environments. The antibacterial effect of oak itself means that eyeglass temples with oak added can also inhibit the growth and reproduction of bacteria. In addition, it can also give the eyeglass temples the color and texture of oak, improving the texture and aesthetics of the eyeglass temples. The inventors discovered during the manufacturing process of these silicone eyeglass temples that: (1) if solid silicone mixed with oak particles is used to make eyeglass temples, the oak particles will be encased in solid silicone and covered by solid silicone after the manufacturing process, making it impossible to see the color and texture of oak on the outside of the eyeglass temples, thus failing to achieve the purpose of improving the texture and aesthetics of the eyeglass temples; (2) if liquid silicone mixed with oak particles is used to make eyeglass temples, although the oak particles will not be encased in liquid silicone and covered by liquid silicone after the manufacturing process, the high viscosity of the adhesive after mixing liquid silicone and oak particles makes it difficult to mix evenly in the injection machine and difficult to push into the mold through the injection device.
[0008] To address the above problems, this invention provides a method for manufacturing liquid silicone eyeglass temples, comprising the following steps:
[0009] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add oak particles to the mixed adhesive and stir to obtain a glue. The oak particle content in the glue is 20% to 60%.
[0010] S2. Place the rubber compound on the rubber mixing mill for mixing. After mixing, remove the rubber compound from the rubber mixing mill, flatten it and cut it into rubber strips suitable for placement into the mold cavity.
[0011] S3. Place the rubber strip and metal frame into the mold cavity, close the mold, heat and pressurize to vulcanize the rubber material to cover the metal frame, and demold to obtain the temple of the eyeglasses.
[0012] Beneficial effects: The A and B components of liquid silicone are mixed together to obtain a mixed adhesive. Oak particles are added to the mixed adhesive and stirred to obtain a rubber compound. The content of oak particles in the rubber compound is controlled to be 20% to 60%. The resulting rubber compound has a consistency that is greater than that of the liquid mixed adhesive obtained by mixing only the raw materials A and B of liquid silicone in the existing technology, but slightly less than that of solid silicone. On the other hand, the viscosity is greater than that of the liquid mixed adhesive obtained by mixing the raw materials A and B of liquid silicone, and also greater than that of solid silicone. Therefore, it will be close to the texture of solid silicone. Therefore, there is no need to use a glue injection machine, but it can be put on a rubber mixing mill for mixing like solid silicone. After mixing, it is cut into rubber strips and placed into the mold cavity for vulcanization to obtain the temple of the eyeglass. The present invention uses liquid silicone material to make the temple of the eyeglass, which retains the advantages of liquid silicone material compared with solid silicone material. The manufacturing process does not require the use of a glue injection machine, which reduces the equipment cost and avoids the problems mentioned above (2) where the rubber compound is difficult to mix evenly in the glue injection machine and difficult to push into the mold through the injection device. Detailed Implementation
[0013] The present invention will be further described in detail below with reference to specific embodiments.
[0014] Example 1
[0015] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0016] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 20 minutes to obtain a glue. The oak granule content in the glue is 20%.
[0017] S2. Place the rubber compound on the rubber mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the rubber mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the rubber mixing mill for 20 minutes, it is shoveled off the rubber compound, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0018] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization temperature can be selected according to the oak particle content. In this embodiment, it is vulcanized at 140℃ for 5 minutes.
[0019] S4. Place the temples of the glasses in an oven and heat them at 120°C for 4 hours for secondary vulcanization. The purpose is to: (1) strengthen the molding; (2) deepen the color of the temples of the glasses.
[0020] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking at 80°C for 4 hours to remove moisture and improve the bonding between the oak particles and the mixed adhesive. This prevents the oak particles from easily falling off the mixed adhesive or causing a rough surface on the eyeglass temples due to low bonding. In other embodiments, other drying methods and temperatures can be used, as long as the moisture in the oak particles is removed.
[0021] Because the viscosity of the rubber compound obtained by mixing liquid silicone with oak particles is greater than that of solid silicone, if the existing solid silicone turning method is used to turn the rubber compound during the mixing process in step S2, the rubber compound will adhere tightly to the rollers and be difficult to remove, resulting in poor mixing uniformity. Therefore, in this embodiment, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers to complete the turning process and ensure the mixing uniformity of the rubber compound. Due to the high viscosity of the rubber compound, if the rubber compound shoveled from the mixing mill is directly flattened and cut, some of the rubber compound will stick to the cutter or pressure plate. If it is directly wrapped in PE film and flattened and cut, some of the rubber compound will stick to the inner surface of the PE film. Both of these situations will lead to surface defects in the rubber strip, reduce product yield, and increase production costs. In this embodiment, water is coated on the inner surface of the PE film to prevent the wrapped rubber compound from sticking to the inner surface of the PE film, thereby improving product yield.
[0022] Example 2
[0023] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0024] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add oak particles to the mixed adhesive and stir for 30 minutes to obtain a glue. The oak particle content in the glue is 30%.
[0025] S2. Place the rubber compound on the rubber mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the rubber mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the rubber mixing mill for 20 minutes, it is shoveled off the rubber compound, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0026] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 130℃ for 6 minutes.
[0027] S4. Place the temples of the glasses in an oven and heat at 110℃ for 5 hours for secondary vulcanization to strengthen the shape.
[0028] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking at 80°C for 5 hours.
[0029] Example 3
[0030] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0031] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 40 minutes to obtain a glue. The oak granule content in the glue is 40%.
[0032] S2. Place the rubber compound on the mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the mixing mill for 25 minutes, it is shoveled off the mixing mill, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0033] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 120℃ for 7 minutes.
[0034] S4. Place the temples of the glasses in an oven and heat at 100℃ for 6 hours for secondary vulcanization to strengthen the shape.
[0035] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking them at 80°C for 6 hours.
[0036] Example 4
[0037] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0038] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 50 minutes to obtain a glue. The oak granule content in the glue is 50%.
[0039] S2. Place the rubber compound on the mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the mixing mill for 30 minutes, it is shoveled off the mixing mill, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0040] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 110℃ for 8 minutes.
[0041] S4. Place the temples of the glasses in an oven and heat at 90℃ for 6 hours for secondary vulcanization to strengthen the shape.
[0042] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking at 70°C for 4 hours.
[0043] Example 5
[0044] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0045] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 60 minutes to obtain a glue. The oak granule content in the glue is 60%.
[0046] S2. Place the rubber compound on the mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the mixing mill for 30 minutes, it is shoveled off the mixing mill, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0047] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 110℃ for 9 minutes.
[0048] S4. Place the temples of the glasses in an oven and heat at 90℃ for 6 hours for secondary vulcanization to strengthen the shape.
[0049] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking them at 60°C for 4 hours.
[0050] Example 6
[0051] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0052] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 60 minutes to obtain a glue. The oak granule content in the glue is 60%.
[0053] S2. Place the rubber compound on the mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the mixing mill for 30 minutes, it is shoveled off the mixing mill, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0054] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 120℃ for 10 minutes.
[0055] S4. Place the temples of the glasses in an oven and heat at 110℃ for 6 hours for secondary vulcanization to strengthen the shape.
[0056] The manufacturer can adjust the baking temperature of the oak particles according to the desired depth of color of the eyeglass temples. In this embodiment, in step S1, the oak particles are dried before being added to the mixed glue. Specifically, the oak particles are baked at 100°C for 4 hours to dry them. Baking the oak particles at 100°C can deepen their color, and the final eyeglass temples will also be darker as a result.
[0057] Example 7
[0058] The method for manufacturing liquid silicone eyeglass temples includes the following steps:
[0059] S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir for 30 minutes to obtain a glue. The oak granule content in the glue is 30%.
[0060] S2. Place the rubber compound on the mixing mill for mixing. During the mixing process, the rubber compound is turned over. Specifically, the rubber compound is shoveled off the rollers of the mixing mill and then placed back between the two rollers for the next mixing. This process is repeated several times to ensure that the rubber compound is mixed evenly. After the rubber compound has been mixed on the mixing mill for 25 minutes, it is shoveled off the mixing mill, wrapped in a PE film with the inner surface coated with water, and then flattened and cut into strips suitable for the size of the mold cavity.
[0061] S3. Open the PE film and put the rubber strip into the mold cavity. Put the metal bracket into the mold cavity, close the mold, heat and pressurize it to make the rubber material vulcanize and form it to cover the metal bracket. Demold to get the eyeglass temple. The vulcanization process is specifically vulcanization at 130℃ for 10 minutes.
[0062] S4. Place the temples of the glasses in an oven and heat at 120℃ for 5 hours for secondary vulcanization to strengthen the shape.
[0063] In step S1, before adding oak particles to the mixed adhesive, the oak particles are dried, specifically by baking them at 100°C for 6 hours.
[0064] In embodiments 1 to 7 of the present invention, the content of oak particles in the adhesive in step S1 is in the range of 20% to 60%. If the content of oak particles is less than this range, the oak color and texture on the surface of the eyeglass temple will be weakened, affecting the aesthetics of the eyeglass temple. If the content of oak particles is greater than this range, the content of mixed adhesive (i.e., liquid silicone material) in the adhesive will be low, which will result in a low degree of bonding between the oak particles and the mixed adhesive, causing the oak particles to fall off easily from the mixed adhesive, or causing the surface of the finished eyeglass temple to be rough.
[0065] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.
Claims
1. A method for manufacturing liquid silicone eyeglass temples, characterized in that, Includes the following steps: S1. Mix the A and B components of liquid silicone together to obtain a mixed adhesive. Add dried oak granules to the mixed adhesive and stir to obtain a glue. The oak granule content in the glue is 20% to 60%. The consistency of the adhesive is between that of a mixture of pure liquid silicone A and B and that of solid silicone; the viscosity of the adhesive is greater than that of a mixture of pure liquid silicone A and B; and the viscosity of the adhesive is greater than that of solid silicone. S2. Place the rubber compound on the rubber mixing mill for mixing. Scoop the rubber compound off the rollers of the rubber mixing mill and put it back between the two rollers for the next mixing. Repeat this process several times to ensure that the rubber compound is mixed evenly. After mixing, remove the rubber compound from the rubber mixing mill. Wrap the rubber compound in a PE film with water on the inner surface, flatten it, and cut it to obtain a rubber strip suitable for placement into the mold cavity. S3. Place the rubber strip and metal frame into the mold cavity, close the mold, heat and pressurize to vulcanize the rubber material to cover the metal frame, and demold to obtain the temple of the glasses; The temples of the glasses are placed in an oven for secondary vulcanization to strengthen and solidify their shape.
2. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, In step S1, oak particles are added to the mixed adhesive and then stirred for 20 to 60 minutes to obtain the adhesive compound.
3. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, In step S1, the content of oak particles in the adhesive is specifically 30%.
4. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, In step S2, the rubber compound is specifically mixed on a rubber mixing mill for 20-30 minutes.
5. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, In step S3, the rubber compound is specifically vulcanized at 110–140°C for 5–10 minutes.
6. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, The secondary vulcanization is specifically carried out by baking at 90-120℃ for 4-6 hours.
7. The method for manufacturing liquid silicone eyeglass temples according to claim 1, characterized in that, The drying process specifically involves baking at 60–100°C.