For bonding to occur, the two parts undergoing the two-shot molding process must be chemically compatible. Fabrik consults with customers and material suppliers to ensure proper material selection for the specific application.

Extrusion is the second widely used processing technology for PMMA moulding compounds. In this process, the moulding compound pellets are melted and conveyed in a heated barrel containing one or two rotating screws. The melted plastic is pushed through a die or head with the desired shape. Upon exiting the die; the material cools to its final cross-sectional shape. This process is typically used in the manufacture of sheets, films, pipes, tubes, rods and profiles for a variety of applications.

Commonly used materials for two-shot injection molding include thermoplastics, thermoplastic elastomers, and liquid silicone rubber.

The two-shot molding process improves the final product in terms of feel, color, and functionality. There are many design opportunities to suit specific preferences. Examples of two-shot injection molded products include toothbrush handles, buttons, switches, caps and closures, and hand and power tools.

Also called multi-shot or double-injection molding, two-shot injection molding is an over-molding process that adheres additional material—like thermoplastic elastomer (TPE)—to plastic substrates to improve the appearance, grip, handling, environmental resistance, or impact resistance of injection molded components. Two-shot injection molding is typically performed by multi-barrel injection molding machines, which add extra material shortly after forming the substrate to create strong bonds between the materials.

Two-shot plastic injection molding is an injection molding process used to create multilayer, multicolor, or multi-material parts in a single process. This process is also sometimes referred to as two shot injection molding, 2-shot molding, 2K, multilayer, multi-shot injection molding, or multishot molding. Multi-shot manufactured products eliminate steps in the manufacturing process while creating a more cost-effective, enhanced finished product.

The two-shot injection molding process consists of two main phases. Similar to traditional injection molding, the first phase involves injecting resin into a mold, which is then cooled to form a solid part in the shape of the mold. The second phase involves overmolding the 1st shot by transferring it to a second cavity by robot or rotating platen. The two plastic resins will form a molecular bond and, once cooled and ejected, becomes a finished multi-resin molded part.

Injection moulding is the process of injecting a molten plastic into a mould under pressure. The moulding compounds are fed into an injection unit typically consisting of a screw and a heated barrel. The screw rotates, melts and conveys the melted polymer. Then the screw moves forward pushing the melted plastic into the mould. The plastic fills the mould and cools, leaving a formed part in the shape of the mould. This process is typically used in the manufacture of automobile parts, electronic pieces, and medical device components.

PMMA moulding compounds are easily processed using traditional thermoplastic processing equipment. The two primary methods of processing this material are injection moulding and extrusion.

At Fabrik Molded Plastics, Inc., we offer custom two-shot plastic injection molding capabilities. Other service offerings include precision plastic injection molding, insert molding, CT scanning, scientific plastic injection molding, automotive lighting, tooling transfers, and custom automation services.

Fabrik Molded Plastics, Inc. is a custom injection and insert molding provider of thermoplastic products. We use the latest molding technologies and automation equipment in our full-service offerings to ensure we compete at the global level. Because we use the latest molding technologies and a  scientific approach in our molding processes, our clients can reap the benefits of our competitive advantage. Contact us today or request a free quote to start your custom project.