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Gas assisted injection molding is a special injection molding technology developed on the basis of traditional thermoplastic injection molding technology, which is suitable for special performance req...
Silicone overmolding is a technique where a layer of silicone rubber is molded over a substrate to provide protection. The silicone can be molded into various shapes and thicknesses, and is commonly used to produce protective covers for electronic components.
There are three primary kinds of silicone overmolding: two-shot overmolding, insert overmolding, and multi-shot overmolding.
1. Two-shot overmolding is the most commonly used type. First, a rigid plastic substrate is molded, and then a soft silicone is molded onto or around the substrate.
2. Insert overmolding is similar to two-shot overmolding, but insert overmolding involves placing a pre-formed insert into the mold before injection molding. The insert can be made from any material, but is typically made from metal or plastic.
3. Multi-shot overmolding is a method of overmolding that involves the use of three or more different types of silicone.
Firstly, the substrate is introduced into the mold and subsequently solidifies, the substrate may be silicone or another material.
It is then placed within the same mold, following which molten silicone rubber material is injected to overmold the substrate part.
Upon cooling, it can combine securely and smoothly to the substrate. Generally, the combination process can be accomplished in a mere 30-60 seconds.
When you design for silicone overmolding, there are several factors that you need to take into account.
1. The parts that will be overmolded should have an even wall thickness to ensure that the layers bond correctly.
2. To achieve a seamless finish, it is imperative that the surfaces intended for overmolding are smooth and devoid of any defects.
3. The design needs to ensure enough space between the two components to be molded together so that the silicone doesn't leak through and cause an untidy appearance.
4. The silicone overmolding process must be meticulously planned and tested to guarantee adequate coverage and bonding between the layers.
Simple analysis using Silicone Overmolding products for:
Baby products, maternal and infant supplies, baby bottles, bottle cases.
Kitchen ware, kitchen utensils and appliances and related auxiliary utensils.
Ornaments used in beauty products, daily necessities, such as silicone heart rate band, silicone bracket, silicone watch band, etc.
Conductive silicone, medical silicone, foam silicone, silicone mold-making, etc.
Silicone pad, silicone plug and silicone sealing.
Photocopiers, keyboard, electronic dictionaries, remote controls, toys, silicone buttons.
Gasket, electronic accessories packaging materials, automotive electronic accessories.
Aviation, cutting-edge technology, special materials and construction of military technology department.
Silicone Overmolding is a technique where a layer of silicone rubber is molded over a substrate to provide protection.
The main difference is the material used. Silicone overmolding utilizes silicone materials, which offer different properties compared to traditional plastics. Silicone has excellent heat resistance and flexibility, making it suitable for applications involving high temperatures or dynamic movements.
Silicone overmolding can achieve a variety of surface finishes, including smooth finishes, textured finishes, and even soft-touch finishes. Surface treatments such as polishing, sandblasting, and laser etching can be applied during the overmolding process to achieve the desired appearance and texture.
Yes, silicone overmolding is commonly used in food-grade applications due to its non-toxicity, flexibility, and resistance to food ingredients. It is used for manufacturing food storage containers, kitchen utensils, and baby products.
