Historically, Thermoplastics (TP) and Liquid Silicone Rubber (LSR) occupied distinctive universes. Although similar in many ways, each method solved an array of challenges by employing different manufacturing processes. Since its introduction into the world of materials science in the 1970s, LSR has become the “go-to” material for product designers and manufacturers across a broad range of industries. The unique properties of LSR — such as stability, non-reactivity and resistance to extreme temperatures — make it the ideal material choice for numerous applications.To get more news about 2k injection moulding, you can visit asm-mold.com official website.

However, product designers have the ever-present challenge of creating high-performance products with the fewest parts. In recent years, advances in material technology have given designers the luxury of combining silicone rubber with thermoplastics in a 2-Shot molding process. This method allows manufacturers to produce single-molded components comprising multiple materials with unique performance characteristics.
For example, perhaps the part specifications require the rigidity of a thermoplastic and the soft flexibility inherent in LSR. With two-shot injection molding, thermoplastic material functions as the substrate to accommodate the liquid silicone rubber‘s inherent quality of compression and elongation.

Today, blended TP and LSR components make up products ranging from consumer electronics and automobiles to medical devices and industrial/defense assemblies. Companies, across a variety of industries, can produce complex, precision LSR components in high volumes and parts that meet the most demanding applications.

This two-shot injection molding guide can assist you in your understanding of the process and how your company can use its capabilities to help you produce high-performance parts efficiently.

What Is Multi-shot Injection Molding?
The two-shot (2K) injection molding technique is the ability to create injection-molded parts by forcing two different materials into different locations in the same mold. Consequently, a minimum of two shots are injected into the mold as compared to the single injection common in traditional injection molding methods. Often, the term “Two-Shot Injection Molding” and the use of associated expressions have caused a bit of confusion about the process.

The uncertainty has to do with the wide range of multi-material applications that go beyond the using of soft materials on rigid substrates. The lack of clarity may also result from the properties of the molded component or base process.

For instance, some manufacturers used the term to describe the insert molding process, which entails the placement of an insert into the injection mold prior to molding. Then, melted plastic material is injected into the mold to fill the cavity and mold around the inserted part. The insertion technique is also used for metal/LSR parts integration. The metal undergoes cleaning and pre-treatment before feeding the metal substrate directly into the LSR injection-molding unit.