Multi Shot Injection Molding

Two shot injection molding, sometimes referred to as Multi Shot molding or 2K molding, is a very effective manufacturing technique that creates a single product by combining molded pieces made of two or more different materials. This method lets you create complex components in different colors and materials. Two main ingredients are normally used, but you can use up to three. To keep things clean and minimize handling, the procedure usually takes place in one machine. This process is great for making toothbrush handles, buttons, switches, and other tools. It makes production more efficient and cheaper. To make sure we choose the right materials and improve the product, TYM works closely with suppliers and customers.

Advantages of multi shot injection molding

Choosing a two-shot injection molding process offers several advantages that enhance production efficiency and product quality.
High Production Rates: Capable of producing large quantities of parts quickly, making it ideal for high-volume production.
Cost-Effective for Large Runs: Productions costs decrease drastically as volumes increase after the mold is made initially.
High precision and detail: capable of producing detailed designs with tight tolerance levels, for the good quality parts.

How it works?

2 shot injection molding has two steps. To make a solid item, liquid silicone rubber is first injected into a mold and cooled. In the second phase, a second liquid silicone rubber (lsr) is injected into the second mold using a robotic arm or spinning platen. Two liquid silicone rubbers are mixed and cooled to make a molded item. Liquid silicone rubber, thermoplastics, and thermoplastic elastomers are often used in this process.

Liquid Silicone Rubber (LSR) Advantages

Reasons to Choose Liquid Silicone Rubber (LSR)

Introduction

TYM has been a leader in LSR injection molding since 2002, including rubber and plastic facilities specializing in the LSR genre of polymers to offer services for volume production involving both Two shot as well as Multi Shot over molding. Boasting over 20 years of experience and a team comprised of incomparable experts

Chemical Composition of LSR

The unique properties of silicone rubber flow from its chemical structure, a backbone made up siloxane bonds (-Si-O-Si-). The chemical structure of the silicone parts in silicone rubber is that it contains siloxane bonds which are substantially stronger 433 kJ/mol than carbon bond (355 kJ/mol), hence used to make parts with higher heat resistance, better flexibility and longer service life.

Furthermore, the siloxane bond has quite weak intermolecular force hence allows free rotation of pendant groups like other organic compounds and thus gives silicone rubber its unique character such as flexibility, elasticity good compressibility outstanding resilience excellent weathering resistance.

How long has our company been using this process?

Since 2002, TYM Silicone Parts has designed and produced customised parts, such as LSR two Shot and 2 shot injection molding parts, in collaboration with well-known corporations and international enterprises. We have more than 20 years of experience. Serving markets like consumer electronics, automobiles, medical devices, and items for mothers and babies, TYM prioritizes superior manufacturing and outstanding value. With its highly automated manufacturing facilities in Guangzhou, China, the business effectively completes large orders and guarantees prompt delivery via adjacent international transportation hubs.

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Two Shot Injection Molding VS. LSR Injection Molding

Multi Shot Injection Molding
Two Shot Injection Molding is a process that uses molten plastic to create solid objects. In this method, the first phase involves injecting liquid silicone rubber into a cavity, which solidifies and cools. After removing the substrate, it rotates 180 degrees for the second phase, where a second liquid silicone rubber is injected to fuse with the first. The final piece is ejected after cooling, showcasing the efficiency of 2 shot injection molding.
LSR overmolding
It is a process where a second material is molded over an silicone parts to enhance performance and appearance. It begins with engineers injection molding a sturdy substrate, which is then placed in an overmold tool. The material is injected around the substrate, and once cooled, it creates a strong bond between the two materials, resulting in robust, functional parts that last over time.

Industries & Applications

Overall, two shot iniection molding provides effective solutions across various industries, leveraging the unique properties of liquid siicone rubber to enhance product quality and performance