Silica gel multi-color integrated forming process

Abstract

The invention relates to the technical field of silica gel forming, in particular to a silica gel multi-color integrated forming process which comprises the following steps: firstly, preparing silica gel materials of various colors, selecting the silica gel materials of different colors according to design requirements, and when the silica gel materials of different colors are injected into silica gel, controlling the injection speed, the injection amount and the structure of a mold, layering the silica gel with different colors; and bubble treatment is carried out after injection: in the silica gel injection process, generated bubbles are eliminated in time, and subsequent use is affected. In the silica gel forming process, a product with small surface bubbles and a small number can be treated by adopting a repairing method, and a silica gel material with the color similar to that of the product is used for filling and polishing the bubble parts, so that the bubble parts are flat and consistent with the peripheral surface, the generated bubbles are timely eliminated in the silica gel injection process, and the quality of the product is ensured. In addition, due to the fact that the integrated forming technology is adopted, the production efficiency is high, and the forming speed is high.

Description

Technical Field

[0001] The invention relates to the technical field of silicone molding, and in particular to a silicone multi-color integrated molding process. Background Art

[0002] As a high-quality polymer material, silicone is widely used in various fields due to its good elasticity, high and low temperature resistance and chemical stability. In the production process of silicone products, one-piece molding process has become a very important molding technology.

[0003] The silicone one-piece molding process refers to injecting silicone raw materials into a mold under a certain temperature and pressure to obtain a silicone product of the desired shape through a one-time molding operation. In the current silicone production process, low mold temperature, insufficient vulcanization time or uneven mixing of silicone and curing agent will cause the silicone product to be partially or completely incompletely cured, showing softening, stickiness or lack of hardness. Uneven silicone mixing, mold surface contamination or unreasonable injection port design will lead to defects such as bubbles, burrs, cracks or uneven color on the surface. A silicone multi-color one-piece molding process is needed to solve this problem. Summary of the invention

[0004] The purpose of the present invention is to provide a silicone multi-color integrated molding process to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a silicone multi-color integrated molding process, comprising the following steps:

[0006] S1. First, prepare silicone materials of various colors, select silicone materials of different colors according to design requirements, and perform color matching;

[0007] S2. Secondly, clarify the required color. You can refer to color sample books, physical samples or other reliable color sources, prepare liquid silicone base materials, suitable color paste or color powder, analyze and determine the required basic color tone and color paste ratio according to the target color, mix the weighed color paste with liquid silicone in a certain proportion, use a stirring rod to fully stir the mixture to ensure that the color paste is evenly distributed in the silicone, and filter the prepared silicone to remove possible color paste particles to ensure the quality of the silicone, and then obtain the prepared silicone;

[0008] S3. Prepare the mold: Make the corresponding mold according to the product design requirements and inject silicone: inject the prepared silicone material into the mold and spray, scrape or inject according to the design requirements;

[0009] S4, then determine the color stratification: when injecting silicone materials of different colors into the silicone, the silicone materials of different colors are stratified by controlling the injection speed and injection volume as well as the structure of the mold;

[0010] S5. Bubble treatment after injection: During the silicone injection process, timely remove the bubbles generated, which will affect the subsequent use;

[0011] S6. Place the injected silicone mold at a suitable ambient temperature to allow it to cure naturally or by heating;

[0012] S7, demoulding after heating and curing, after the silicone is cured, the mold is opened and the silicone product is taken out;

[0013] S8. Finally, clean and trim the demoulded silicone product to meet the design requirements.

[0014] As a preferred technical solution of the present invention, during the color mixing process in step S2, the environment is kept clean and dry to prevent impurities and moisture from affecting the silica gel. The silica gel and color are mixed at room temperature to avoid extreme temperature environments. If color difference occurs, it can be corrected by adjusting the color paste ratio until the desired color is achieved.

[0015] As a preferred technical solution of the present invention, in step S3, the A and B agents should be strictly prevented from contacting with acid, water, alkali, and strong oxidants, as these substances may react with the silica gel, affecting its vulcanization process and further affecting the quality of the product. Contact with compounds containing elements such as nitrogen (N), sulfur (S), phosphorus (P), and tin (Sn) should also be avoided, as these elements may affect the vulcanization degree of the silica gel, resulting in poor or incomplete vulcanization of the product.

[0016] As a preferred technical solution of the present invention, in step S4, the mold needs to be fully inspected to ensure that there is no damage or wear, and timely repair or replacement if necessary, and the mold surface is cleaned to remove all impurities and dirt to prevent surface defects of the product.

[0017] As a preferred technical solution of the present invention, in step S5, for products with smaller and fewer surface bubbles, a repair method can be used to fill and polish the bubble area with silicone material similar in color to the product to make it smooth and consistent with the surrounding surface.

[0018] As a preferred technical solution of the present invention, the suitable temperature range of the silicone mold is usually between -40°C and 250°C. Within this temperature range, the silicone mold can maintain good elasticity and stability to ensure product quality and production efficiency. Moreover, within the suitable temperature range, the silicone mold can maintain a stable shape and size and is not easy to deform or melt. At low temperatures, the silicone mold can maintain good elasticity and softness, which is convenient for demolding and product removal.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention is a silicone multi-color integrated molding process. During the silicone molding process of the present invention, for products with small surface bubbles and a small number, a repair method can be used to treat them. The bubble area is filled and polished with silicone material similar to the color of the product to make it smooth and consistent with the surrounding surface, thereby ensuring that the bubbles generated during the silicone injection process are removed in time to prevent them from affecting subsequent use.

[0021] (2) The present invention is a multi-color integrated molding process for silicone. The integrated molding process adopted by the present invention has high production efficiency: due to the fast molding speed, the integrated molding process can shorten the production cycle and improve production efficiency. The integrated molding process can ensure the dimensional accuracy and appearance quality of silicone products and reduce the defective rate. By accurately controlling the amount of raw material injection, the integrated molding process can reduce material waste and reduce production costs. DETAILED DESCRIPTION

[0022] The invention is further described below in conjunction with specific implementation methods:

[0023] Example 1

[0024] Embodiment 1 comprises the following steps:

[0025] S1. First, prepare silicone materials of various colors, select silicone materials of different colors according to design requirements, and perform color matching;

[0026] S2. Secondly, clarify the required color. You can refer to color sample books, physical samples or other reliable color sources, prepare liquid silicone base materials, suitable color paste or color powder, analyze and determine the required basic color tone and color paste ratio according to the target color, mix the weighed color paste with liquid silicone in a certain proportion, use a stirring rod to fully stir the mixture to ensure that the color paste is evenly distributed in the silicone, and filter the prepared silicone to remove possible color paste particles to ensure the quality of the silicone, and then obtain the prepared silicone;

[0027] S3. Prepare the mold: Make the corresponding mold according to the product design requirements and inject silicone: inject the prepared silicone material into the mold and spray, scrape or inject according to the design requirements;

[0028] S4, then determine the color stratification: when injecting silicone materials of different colors into the silicone, the silicone materials of different colors are stratified by controlling the injection speed and injection volume as well as the structure of the mold;

[0029] In this embodiment, during the color mixing process in step S2, the environment is kept clean and dry to prevent impurities and moisture from affecting the silica gel. The silica gel and color are mixed at room temperature to avoid extreme temperature environments. If color difference occurs, it can be corrected by adjusting the color paste ratio until the desired color is achieved. In step S3, it is necessary to strictly avoid contact between agents A and B and acid, water, alkali, and strong oxidants. These substances may react with silica gel and affect its vulcanization process, thereby affecting the quality of the product. It should also be avoided from contact with compounds containing elements such as nitrogen (N), sulfur (S), phosphorus (P), and tin (Sn), because these elements may affect the vulcanization degree of silica gel, resulting in poor or incomplete vulcanization of the product. In step S4, the mold needs to be fully inspected to ensure that there is no damage or wear. If necessary, it should be repaired or replaced in time, and the mold surface should be cleaned to remove all impurities and dirt to prevent surface defects of the product.

[0030] Example 2

[0031] Example 2, this implementation further illustrates Example 1, and includes the following steps:

[0032] S5. Bubble treatment after injection: During the silicone injection process, timely remove the bubbles generated, which will affect the subsequent use;

[0033] S6. Place the injected silicone mold at a suitable ambient temperature to allow it to cure naturally or by heating;

[0034] S7, demoulding after heating and curing, after the silicone is cured, the mold is opened and the silicone product is taken out;

[0035] S8. Finally, clean and trim the demoulded silicone product to meet the design requirements.

[0036] In this embodiment, in step S5, for products with smaller surface bubbles and fewer in number, a repair method can be used to fill and polish the bubble area with a silicone material that is similar in color to the product to make it smooth and consistent with the surrounding surface. The suitable temperature range of the silicone mold is usually between -40°C and 250°C. Within this temperature range, the silicone mold can maintain good elasticity and stability to ensure product quality and production efficiency. Moreover, within the suitable temperature range, the silicone mold can maintain a stable shape and size and is not easy to deform or melt; at low temperatures, the silicone mold can maintain good elasticity and softness, which is convenient for demolding and product removal.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A silicone multi-color integrated molding process, characterized in that: The following steps are involved: S1. First, prepare silicone materials of various colors, select silicone materials of different colors according to design requirements, and perform color matching; S2. Secondly, clarify the required color. You can refer to color sample books, physical samples or other reliable color sources, prepare liquid silicone base materials, suitable color paste or color powder, analyze and determine the required basic color tone and color paste ratio according to the target color, mix the weighed color paste with liquid silicone in a certain proportion, use a stirring rod to fully stir the mixture to ensure that the color paste is evenly distributed in the silicone, and filter the prepared silicone to remove possible color paste particles to ensure the quality of the silicone, and then obtain the prepared silicone; S3. Prepare the mold: Make the corresponding mold according to the product design requirements and inject silicone: inject the prepared silicone material into the mold and spray, scrape or inject according to the design requirements; S4, then determine the color stratification: when injecting silicone materials of different colors into the silicone, the silicone materials of different colors are stratified by controlling the injection speed and injection volume as well as the structure of the mold; S5. Bubble treatment after injection: During the silicone injection process, timely remove the bubbles generated, which will affect the subsequent use; S6. Place the injected silicone mold at a suitable ambient temperature to allow it to cure naturally or by heating; S7, demoulding after heating and curing, after the silicone is cured, the mold is opened and the silicone product is taken out; S8. Finally, clean and trim the demoulded silicone product to meet the design requirements.

2. A silicone multi-color integrated molding process according to claim 1, characterized in that: During the color mixing and matching process in step S2, the environment is kept clean and dry to prevent impurities and moisture from affecting the silica gel. The silica gel and color are mixed at room temperature to avoid extreme temperature environments. If color difference occurs, it can be corrected by adjusting the color paste ratio until the desired color is achieved.

3. A silicone multi-color integrated molding process according to claim 1, characterized in that: In step S3, it is necessary to strictly avoid contact between agents A and B and acid, water, alkali, and strong oxidants, as these substances may react with silica gel, affecting its vulcanization process and further affecting the quality of the product. It is also necessary to avoid contact with compounds containing elements such as nitrogen (N), sulfur (S), phosphorus (P), and tin (Sn), as these elements may affect the vulcanization degree of silica gel, resulting in poor or incomplete vulcanization of the product.

4. The multi-color integrated molding process of silicone according to claim 1, characterized in that: In step S4, the mold needs to be fully inspected to ensure that there is no damage or wear. If necessary, it should be repaired or replaced in time, and the mold surface should be cleaned to remove all impurities and dirt to prevent surface defects of the product.

5. The multi-color integrated molding process of silicone according to claim 1, characterized in that: In step S5, for products with smaller bubbles on the surface and fewer in number, a repair method can be used to fill and polish the bubble area with a silicone material that is similar in color to the product to make it smooth and consistent with the surrounding surface.

6. The multi-color integrated molding process of silicone according to claim 1, characterized in that: The suitable temperature range of the silicone mold is usually between -40°C and 250°C. Within this temperature range, the silicone mold can maintain good elasticity and stability to ensure product quality and production efficiency. Moreover, within the suitable temperature range, the silicone mold can maintain a stable shape and size and is not easy to deform or melt. At low temperatures, the silicone mold can maintain good elasticity and softness, which is convenient for demolding and product removal.