Why LSR is The Best Choice For Injection Molding?

With the enhancement of environmental protection awareness, people are more inclined to choose materials that can protect the environment. Liquid silicone rubber is one of them. Have you ever heard of liquid silicone rubber (LSR)? It is a kind of multifunctional material, that has a wide range of applications in various industries. LSR is a two-part liquid material that cures into a durable elastomer. 

Its unique characteristics, such as high tensile strength, resistance to extreme temperatures, and bio-compatibility, make it an ideal material for medical devices, auto parts, and consumer products.One of the advantages of LSR is its ability to adhere to a variety of substrates, including metals, plastics, and glass, which expands the possibilities for their use. It is also very resistant to chemicals, making it ideal for parts exposed to harsh environments.

LSR can be molded into almost any shape or size by injection molding, a cost-effective production method that allows for the rapid production of large numbers of parts. The process produces parts with consistent dimensions and tight tolerances, ensuring accuracy and repeatability. Its bio-compatibility makes it ideal for implantable devices that need to be used in the human body for long periods. In the automotive industry, LSR is used in a variety of applications such as sealing and connectors. It is also used in tire manufacturing because it can resist extreme temperatures without losing its physical properties. The use of LSR in the automotive industry helps improve vehicle longevity and safety.

What is Silicone Injection Molding?

Silicone injection molding is a manufacturing process used to produce liquid silicone rubber (LSR) parts. The process involves injecting LSR material under high pressure and temperature into a mold cavity, where it cures and cures into the desired shape.

Silicone injection molding is usually used to make products with complex shapes, high precision, and good consistency. It is also known for producing high-quality, durable components that can resist extreme temperatures, chemicals, and aging. Some common products made using silicone injection molding include medical devices, auto parts, consumer goods, and electronics.

The silicone injection molding process usually consists of four steps: material preparation, injection, hardening, and extrusion. At the material preparation stage, the LSR material is supplemented as needed and mixed with other additives and dyes. During the injection phase, a high-pressure injection device is used to inject the LSR mixture into the mold cavity. The mold is then heated to solidify the LSR material, and the molded part is then shot out of the cavity.

Why LSR Is The Best Choice For Injection Molding?

Liquid silicone rubber is a material widely used in the injection industry. why LSR is the best choice for Injection Molding? Because there are some  advantages of using LSRS for injection molding:

High-quality products: LSR is known for producing high-quality and consistent components, as it has unique properties that make it strong, flexible, and resistant to extreme temperatures.

Design flexibility: The LSR is ideal for complex molds and complex designs because of its ability to flow into narrow Spaces and retain its shape accurately.

Faster production: LSRS hardens faster than other types of rubber, which means faster production and turnaround times.

Reduce waste: Compared to other methods, LSR injection molding creates less waste because it uses a fully automated process that minimizes the risk of human error.

How To Select The Right Grade of LSR for Your Process?

Selecting the correct grade of liquid silicone rubber (LSR) is critical to a successful manufacturing process. Choosing the right liquid silicone for the board can make your product or component play its best performance and maximize its service life. Here are some factors to consider when choosing the right LSR grade for your craft: Strength, tear resistance, elongation, color, and clarity.

Process requirements: Consider your manufacturing or production process, including injection molding or extrusion, and select the appropriate LSR for that process.

Cure rate: Assess the speed at which LSR cures or cures. LSRS with faster curing times are ideal for mass production and increase productivity.

Medical grade or Industrial grade: Depending on the intended application, you may need to choose between medical grade or industrial grade LSRS. Whereas medical grade LSRS must pass stringent industry standards, industrial grade LSR may be less stringent but still have specific attributes that make them ideal for some applications.

Environmental factors: Consider the environmental conditions to which your product will be exposed, such as temperature, UV, or chemical exposure, and choose an LSR grade that can withstand these conditions.

Common Design Considerations When Working with LSR

Design using liquid silicone rubber (LSR) requires careful consideration of various factors to ensure successful product results. Here are some common design considerations when using LSRS:

Part complexity: LSRS can be molded into complex shapes and geometry, often with strict tolerances. However, it is important to consider the feasibility of part release and consistent mold filling.

Drawing dies: Increasing the drawing die Angle – with a slight taper in the design – makes it easier to remove parts from the die, reducing the risk of damage and defects.

Wall thickness: LSRS can be molded with different wall thicknesses, but wall thicknesses lead to longer curing times and potential defects such as voids, sinking, or ejections.

Notches: These are design features that prevent direct pulling out of the die. Consideration should be given to how the mold will be designed and possible operation to avoid material being trapped in a weaken.

Glitter: This is excess material oozing out of the parting line of the mold, which needs to be trimmed off after treatment. The design team should minimize this to reduce the amount of post-processing effort.

Material cost optimization: Parts with lower hardness and simple geometry can use less expensive LSR materials.

Understanding the Cost Benefits of Using LSR vs Traditional Silicone Rubber

When deciding on a material for a product, cost is often one of the top considerations. Liquid Silicone Rubber (LSR) and traditional solid silicone rubber are both widely used materials in many industries. However, LSR offers several cost benefits over traditional silicone rubber:

Lower material waste: LSR is injected into the mold as a liquid, ensuring no scrap material is produced from the manufacturing process, which can be common with traditional solid silicone rubber.

Reduced labor and cycle times: Using LSR in injection molding can significantly reduce production time as it allows for shorter cure times and faster production cycles compared to traditional silicone rubber.

Fewer post-processing operations: The ability to create more precise and intricate parts with LSR reduces the need for additional post-processing operations like assembly, trimming, and finishing.

Less material needed: LSR can fill the mold more easily, leading to less material needed overall. This can equate to lower raw material costs.

Faster prototyping: With LSR, it is faster and more economical to produce small quantities of prototypes, because the liquid nature of the material allows for faster and shorter testing runs.

LSR Injection Molding Company: NEWTOP Can Be Your Choice

NEWTOP is a versatile enterprise offering comprehensive customization, design, and manufacturing services for Liquid Silicone Rubber (LSR) to customers worldwide. Our top priority is delivering high-quality products and services to a diverse range of industries, including automation, medical, electronics, and manufacturing. 

If you are looking for a reliable LSR injection molding company, we can be the reliable choice for you. Here are some reasons why NEWTOP is the right choice for your LSR injection molding needs:

Expertise and experience: we have been in the LSR injection molding business for over 15 years. Our team of experts has extensive knowledge and experience in designing and manufacturing high-quality LSR products.

State-of-the-art facilities: we use the latest technology and equipment in our manufacturing facilities to ensure the highest quality products and efficient production processes.

Customization Options: we offer complete customization of LSR injection molding services. Our engineers can work with you to design and manufacture products that meet your unique specifications.

Quality Assurance: we have strict quality control measures to ensure that all products meet or exceed customer expectations.

Competitive Pricing: Despite offering high-quality LSR injection molding solutions, NEWTOP offers competitive pricing that makes it an affordable option for businesses of all sizes.

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