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What Are The Ways of Silicone Molding?

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newtopcustomsilicone
What Are The Ways of Silicone Molding?

Silicone application can be seen everywhere in life, such as in medical supplies (oxygen masks, medical equipment, etc.), household products (baking supplies, kitchenware, etc.), baby products (pacifiers, tableware, etc.), and even in the usual places, such as wearing 3C(waterproof gasket, watchband, etc.), smartphone components (waterproof switch, waterproof connector, etc.), As well as vehicle components (waterproof connectors, lamps, etc.) have traces of silicone rubber.

I. What Are the Ways of Silicone Molding?

Silicone raw materials are usually shown in two forms, solid and liquid, different forms of silicone production methods and application ranges are different, solid silicone HTV is usually used in more economical products, and precision requirements are relatively low, such as common household kitchen supplies, heat insulation pads, etc., Liquid silicone lsr is usually used for products with high precision requirements and special needs, such as sealed components and optical grade applications, most of which choose to use liquid silicone molding.

Solid Silicone Rubber

As the name suggests, the appearance is solid, with low transparency. If other colors need to use roller equipment for color mixing and cut to meet the size of the mold forming, then it can be sent to the production line for hot pressing production. The curing mechanism is heating vulcanization, curing time is longer than liquid silicone, which is often used in household products, industrial parts, and vehicle components.

Liquid Silicone Rubber

Liquid silicone packaging for two liquid types, A common packaging for 20 liters or 200 liters of two barrels, that is, often said A, B agent, agent A is usually a catalyst, agent B is usually silicone, but because of the use of different brands may be different, liquid silicone curing mechanism for a platinum bridging mechanism, A, B two agents will be cured after mixing, If there is a color demand, agent C will be used as a color additive. The curing time of the product is shorter than that of solid silicone. It is commonly used in the production of medical products or special process products.

(1) Solid hot pressing

Solid hot pressing molding for the use of solid silica gel placed in the heated mold, with a high-pressure mold locking unit will be solid silica gel in the way of forced deformation in line with the mold product structure, mold heating can make solid silica gel solidified in a short time to achieve the molding effect, can be used for production precision requirements are not high but large output products, generally, a production hole number will be greater than liquid silicone process, But the heat curing time is greater than liquid silicone, the advantage is low cost, the difficulty of the process is also low, the disadvantage is unable to produce high precision or functional demand products.

(2) Silicone Injection Molding

Liquid silicone molding for the use of liquid silicone feeding machine feed to liquid silicone injection machine injection molding, raw materials are liquid before forming, feeding machine in A 1:1 ratio of liquid A and B static mixing, transported to the injection unit of the injection machine for storage, after completion of the liquid silicone injection way to the mold, if the product has color and additive needs, Agent C can be increased, and synchronized in the process of adjustment, the common ratio of A, B, C is 100:100:0.5-5, liquid silicone injection advantages for the production of high precision requirements of products, such as high precision seals.

Silicone rubber will get more and more usage in nowadays’ markets and applications.


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