No, switchblade knives, by definition, are typically made with a metal blade and mechanical components that allow for automatic opening with the press of a button or switch. The term "switchblade" refers to a type of knife that features a spring-loaded blade deployment mechanism. When activated, the blade rapidly extends and locks into place.
Non-metallic materials, such as plastics, composites, or ceramics, are not commonly used for switchblade knives due to their inability to withstand the forces and stresses involved in the automatic opening mechanism. These materials generally lack the necessary strength and durability to function reliably in a switchblade mechanism.
However, it's worth noting that there are non-metallic knives available on the market. These knives are typically made from materials like fiberglass-reinforced plastic (FRP), carbon fiber, or high-strength polymers. Non-metallic knives can be useful in situations where metal detection is a concern, such as in certain security environments. They may have a fixed blade or manual folding mechanism, but they do not fall under the category of switchblade knives.