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Two shot molding, also called double injection moulding, dual injection molding，multi shot injection molding or two shot injection moulding is one category of injection molding using two different thermoplastic materials to produce injection molded parts in two colors or two components in the two shot injection molding process to produce 2 shot molding in large quantities quickly, economically and efficiently. Multi multi injection molding has characteristics as below:

Twin shot moulding, co-injection, two color injection molding and multi component injection molding are all variants of advanced molding techniques.
A combination of hard plastics and soft materials.
Two-step process is executed in a single press cycle.
Combine two or more components to eliminate additional assembly costs.
Keyplast as top of 2 shot injection molding companies, with years of expertise and cutting-edge technology, we offer precise and efficient double shot injection moulding solutions for a wide range of industries. Our skilled team and state-of-the-art facilities ensure top-notch quality and fast turnaround times. Trust KeyPlast for your complex multi material injection molding needs. Contact us today to discuss your project and experience the excellence of KeyPlast's double shot molding capabilities.

Two Shot Molding Process
Two shot injection molding has two stages in the whole process.

Firstly one shot of materials is injected into a mold and cooled to form a solid part. Secondly, the mold opens and rotates 180 degrees and then closes. The second shot of materials is injected into the mold, through or around the first molded part. After sufficient cooling, the mold opens and the multi-resin molded part is ejected. 2 shot moulding has key factors as below:

The cooling system of double shot molding must be able to function adequately on the first and second shots.

Twin Shot Injection Moulding Advantages
Cmpared to other plastic molding methods , the most important bent of 2 shot molding is more economical to manufacture multi-components in the double injection molding process as below

01
Part Consolidation
Dual injection moulding need lower multi-components cost, including the developing, engineering and validation costs related to each additional part and savings in production and assembly.

02
Improved Efficiency
Improvement of effectiveness and efficiency, allowing one single mold but multi-components to be injected, thus simplifying the abor operations and eliminating secondary operations , such as further needs for welding or connecting multi-components after plastic injection molding process of double injection molding.

03
Improved Quality
Improvement of quality and function of double shot molding, permitting lower tolerances than other molding processes, requiring high-qualified accuracy and repeatability and reducing the rate of defect parts.

04
Complex Moldings
Create new mold designs of two shot moulding and allow manufacturing more complex mold designs, Iike multi-metenvels, multi-components or multi-colors that can not be achieved by other molding processes.

Two Shot Injection Molding Applications
Two-shot injection molding, also known as two-component injection molding or double-injection molding, offers a wide range of applications across various industries. Here are some common applications of dual-shot injection moulding:

Automotive Industry: Two-shot injection molding is widely used in the automotive industry for manufacturing components such as multi-colored knobs, buttons, handles, and interior trim. Two-shot moulding allows for the integration of different materials with varying hardness, textures, and colors, enhancing the aesthetics and functionality of automotive parts.

Electronics and Consumer Goods: Double-injection molding is employed in the production of electronic devices and consumer goods. Dual-shot molding enables the creation of products with soft-touch grips, ergonomic designs, and integrated seals or gaskets. Examples include mobile phone cases, computer keyboards, remote controls, and game controllers.

Medical and Healthcare: The medical industry benefits from dual injection moulding for producing devices and components with complex geometries and specialized functions. Double-shot plastic injection molding enables the combination of rigid and flexible materials, facilitating the manufacturing of medical equipment like syringe plungers, drug delivery systems, and surgical instruments.

Packaging Industry: Double-shot molding finds applications in the packaging industry to create containers, closures, and caps with customized colors, textures, and sealing features. Two-shot injection moulding enables the integration of rigid and elastomeric materials, ensuring optimal functionality and aesthetic appeal.

Aerospace and Defense: Two-shot injection molding is utilized in the aerospace and defense sectors for manufacturing components with high durability, lightweight properties, and improved functionality. Double shot injection molding enables the integration of different materials to create parts such as grips, handles, switches, and seals for various applications within these industries.

Household Appliances: double shot injection molding is employed in the production of household appliances, offering enhanced aesthetics, ergonomics, and functionality. Double-shot injection molding enables the combination of materials with different properties to create durable and visually appealing components for appliances like kitchen utensils, power tools, and vacuum cleaner parts.

These are just a few examples of the diverse applications of two-shot injection molding. Its versatility and ability to combine different materials in a single molding process make it a valuable technique for creating complex and innovative products across multiple industries.

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