Everything there is to know about liquid silicone rubber molding

Everything there is to know about liquid silicone rubber molding

In the modern manufacturing sector, liquid silicone rubber molding has been slowly gaining traction over recent years. In this particular procedure, a solid two-part platinum-cured elastomer that is inserted onto the mold cavity forming a part/product.

Liquid silicone rubber is quite adaptable in the elastomer sector; they are used to make a wide variety of goods and products ranging from medical devices to consumer products, the process is shaping out to be a game-changer.

Why go with silicone rubber molding

LSR has a brilliant chemical, electrical, and thermal resistance capabilities, but its important worth noting that this resistance is susceptible to specific solvents such as mineral spirits and gasoline, thus the reason why it’s used in automotive applications and not fuel pipelines.

Due to its minimal compressions’settings, there is a lower chance of deformations during the application and removal of the force, making it suitable for elastomers allowing for economical and faster tooling methods compared to other traditional mold-making processes.

How does it work?

LSR is flexible, which means that the molds are to be manually ejected, which means there is no needs to install ejector pins in mold design. Just like conventional aluminum tools, the molding tool is made using CNC machining, giving it the ability to withstand high temperatures.

After ejection from the mold cavity, the parts are polished according to clients’ wants and specifications; this is done by our in-house finishing department at LT Century.

From finishing services, the tool is loaded onto LSR-specific injection molding press for accuracy and precision control, which ensures there is consistency in the manufacturing of LSR parts.

LSR is a component of thermosetting polymer; in simpler terms, this means once molded its permanent; it cannot be melted and re-cooled again, it’s not the same as thermoplastic. After completion of the run process, the final part and boxed and shipped to clients’ addresses.

Advantages of liquid silicone rubber molding

One of the significant benefits of LSR is the ability to produce molded parts or products in large quantities. Once you’ve catered for initial mold cost, the price per unit during the LSR process is quite low, allowing you to enjoy large economies of scale.

The more you produce the parts, the more the cost of unit price drops drastically. Some of the benefits that come with using LSR include:

Lower scrapping rates

In comparison to other popular manufacturing methods such as CNC machining, which removes a large amount of the mold materials, LSR ranks the same as 3D printing when it comes to scraping rates.

The minimal wastage of mold-raw materials makes the entire process economical in the long-run.


Another advantage of LSR is the technology allows your to manufacture identical parts and products, for clients who want to produce consistent and reliable parts for large-scale production, at LT century we have the perfect solution that is tailored to meet all your requirements and needs in terms of Liquid silicone rubber molding.

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