What is secondary injection molding?

Secondary injection molding: It is a special plastic molding process, also called lamination or encapsulation. It is similar to the two-color molding process, but it is quite different from the two-color molding process. It is a process in which a certain plastic material is molded in a primary plastic mold, and then the molded parts are taken out and placed in a secondary molding mold to inject the same or another plastic material again for molding. What is more complicated will be multiple moldings to make the appearance and process of the plastic product meet the desired requirements, which is called secondary injection molding.

Development status
Secondary injection molding can make the surface of the product full of softness and can also increase product functionality and added value. In the past 10 years, secondary injection molding technology has completely changed the aesthetic standards, design ideas and functional requirements of consumer products. Overmolding is best known for creating "soft-touch surfaces," but it also has many other features, such as ergonomics, two-tone looks, branding, and feature improvements. Using this technology, product functions can be increased, such as noise reduction, shock absorption, waterproofing, anti-collision and added value. It is widely used in mobile phone protective cases/mobile phone cases.
Secondary injection molding, like co-injection molding, dual injection molding and sandwich injection molding, is a multi-material injection molding technology. The basic idea of multi-material injection molding is to combine two or more materials with different properties to increase product value. Generally speaking, the first injected material is called the base material or base material; the second injected material is called the covering material.
Various secondary injection molding technologies In the secondary injection molding process, the covering material is injected above, below, around or inside the base material to form a complete component. This process can be accomplished through multiple injection molding or insert injection molding. Commonly used covering materials are elastic materials.