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liquid silicone rubber molding

How does liquid silicone injection molding innovate products?

How does liquid silicone injection molding create innovation in products? This blog unveils new and exciting discoveries. We will discuss new inventions as well as active changes.

Explore automation and robotics’ roles in change. Embrace the Union of Technology and Innovation. Discover the future. Stay tuned!

What is Liquid Silicone Injection Molding?

Liquid silicone injection molding (LSIM) is a process whereby liquid silicone rubber (LSR) is injected into a mold cavity. It involves the application of pressure and accurate heating to create various products and components. Components such as sprue, runners, and gates help to control the flow of LSR.

Depending on the parts, the LSIM average cycle time may differ. Injection pressures vary between 690 and 1035 bars. Clamp forces help to maintain the stability of molds.

The shot size and injection speed affect the degree of mold fill. Automation leads to improved output in production.

liquid silicone injection molding

Why Choose Liquid Silicone Injection Molding for Your Products?


Products are advantaged by the enhanced durability provided by liquid silicone injection molding. It develops components that are immune to wear and tear as well as other states of the surrounding environment. LSR maintains its mechanical properties under stress.

It is able to resist abrasion and impacts. One advantage of injection molding is that it produces parts with standard dimensions. These include high tensile strength and tear resistance.

This process causes the formation of long-lasting and efficient components. For demanding applications, durability is essential.

Heat Resistance

Another key benefit of liquid silicone injection molding is heat resistance. LSR can withstand extreme temperatures. From -60 to 230 degrees, parts are stable.

In injection molding, the temperature is well regulated throughout the process. It also shows thermal stability while exposed to heat for a long period of time.

This material does not decline under heat stress. This makes it ideal for automotive and industrial applications. Heat resistance increases the use of the product over a longer period of time.


Due to its biocompatibility, liquid silicone molding is popular in the medical and healthcare product industries. LSR is non-interacting with body proteins and is hypoallergenic. It complies with medical requirements. It is ideal for use in implants and devices.

Injection molding provides contamination-free production. Hardware components have a smooth exterior to minimize the growth of bacteria. Thus, biocompatibility implies patients’ safety and comfort during the treatment process. This makes LSR a preferred choice for medical plastic parts.


This is a major characteristic of liquid silicone rubber injection molding. LSR is capable of producing parts with a good degree of elasticity. It is possible to elongate the material without it being detrimentally affected. This is because injection molding ensures that all the parts have the same degree of flexibility.

It has flexibility over a large temperature range. This property is crucial for seals and gaskets.

Stiffness degrades in flexible applications to improve the overall performance of the product. It provides reliability, durability, and a high level of flexibility.


Criteria Durability Heat Resistance Biocompatibility Flexibility
Description High longevity Withstands high temperatures Safe for medical use High elasticity
Temperature Range -50°C to 200°C Up to 300°C Safe for human body -60°C to 200°C
Application Areas Automotive, Electronics Cooking utensils, Industrial Medical devices, Implants Wearables, Seals
Hardness (Shore A) 20-80 30-70 20-60 10-70
Tensile Strength 7-11 MPa 6-10 MPa 5-9 MPa 5-10 MPa
Elongation (%) 200-1000 150-800 150-900 200-1000

Table on Why Choose Liquid Silicone Injection Molding for Your Products!

How Does Liquid Silicone Injection Molding Improve Product Design?

Design Flexibility

Liquid silicone injection molding has very high flexibility compared to other molding processes. Components such as gaskets, seals, and diaphragms are significant beneficiaries.

It is flexible enough to handle complex shapes and structures. It is also relatively simple for engineers to adjust various sizes and thicknesses of walls. This technique helps to maintain material flow continuity.

Thus, it helps to minimize defects since the product is manufactured with the same standards. The thermal characteristics of liquid silicone make it suitable for high-temperature applications.

Manufacturers like it for medical applications because it is biocompatible. Higher precision is achieved to meet the set industry requirements.


Liquid silicone injection molding is known for its improved levels of accuracy. This process also ensures tight tolerances in components and dimensions.

Components such as O-rings and seals are manufactured to high tolerance levels. Shot sizes are kept constant from the beginning until the end of the shooting session.

The pressure in the mold cavity is well regulated. This method reduces flash and waste. Automated systems guarantee consistency and accuracy in the work carried out. Liquid silicone does not allow changes in shrinkage. The results meet exact specifications.


This is made possible through liquid silicone injection molding, which promotes customization. Original designs address particular needs. Prototypes can easily be created and used in testing. It is possible to have different durometers in one part.

Material formulations are altered by engineers where necessary. Complex molds define unique characteristics of the components in question. That is why custom color options add to the beauty of the product. Different levels of hardness offer functional differentiation. Liquid silicone can be used in overmolding on various substrates.

Complex Geometries

Designing intricate forms and shapes is not a problem when it comes to using liquid silicone injection molding. Undercuts and thin walls are examples of intricate designs. This process is best suited to handle multi-cavity molds. Details such as channels and grooves are distinct.

Its low viscosity is utilized by engineers for precise molds. Advanced cooling systems keep parts characteristics intact. It supports integrated seals within housings.

This makes liquid silicone ideal for use in dynamic applications due to the flexibility of the material. Novel geometries promote the functionality of the product.

Manufacturing Accuracy

With liquid silicone injection molding, manufacturing accuracy is assured. Another advantage relates to dimensional consistency. Automated systems eliminate the chances of human errors when handling molds. Material movement is closely measured by precision instruments.

Stable temperature controls are accurate. Injection speeds are well controlled. This process helps to reduce cycle times effectively. Lesser variation ensures quality production.

Final inspections verify compliance. Liquid silicone is long-lasting and flexible, which makes it suitable for performing for a long time.

liquid silicone injection moulding

How Does Liquid Silicone Injection Molding Enhance Product Performance?

Product Lifespan

Components that are subjected to liquid silicone injection molding have a longer life span. It is important to note that molding processes help to achieve a consistent wall thickness. It also reduces stress concentration. The resulting parts show elevated resistance.

All these components have good thermal characteristics. Products also last longer in terms of structure. Notably, the UV resistance is greatly improved as well. The presence of contaminants is life-threatening.


Liquid silicone injection molding enhances safety since it is free from volatile organic compounds. The method helps ensure that parts remain biocompatible. Flame resistance is inherent to silicone, further boosting safety. Molding creates parts with tight dimensional specifications.

Medical-grade components benefit greatly. The process thus helps to minimize extractables. It can now be said that high levels of purity are kept constantly. Parts are safe for sensitive application.

Tactile Qualities

Liquid silicone injection molding makes it possible to have enhanced tactile properties. It results in improved surface finishes. Textural consistency is guaranteed. Molding makes it possible to achieve various designs. Soft-touch elements are frequently used.

Variability in hardness levels is allowed. Parts offer excellent grip. It is these qualities that are desirable in user interface components.


Liquid silicone injection molding enables the production of parts with high reliability. The method minimizes the possibility of defects. This way, the material properties are kept consistent.

These parts also demonstrate good electrical insulation. A high tear resistance is realized. They are very effective, even in harsh environments. Dimensional accuracy is maintained. Regularity of cycle times improves production predictability.

Superior Properties

Products produced by liquid silicone injection molding show enhanced mechanical features. High tensile strength is adopted. Components demonstrate remarkable elasticity. They also have high resistance to compression. One of the major advantages is its high chemical stability.

This makes it possible to create hard-to-imagine shapes and designs. Superior clarity is achieved. These properties satisfy the requirements of high applications.

What Are the Quality Control Measures in Liquid Silicone Injection Molding?

Dimensional Inspection

Tolerances are very strict when it comes to liquid silicone injection molding. Every molded part is measured in micrometers. CNC machines ensure consistency. Shrinkage factors are critical. They also monitor cavity pressure information. 3D scanners verify shapes.

The mold cavities must conform to the design specifications. Computer-controlled systems are used for intensive inspection. Dimensional verification is done using CAD models. Measurement accuracy prevents defects.

Mechanical Testing

LSIM parts are subjected to tensile strength tests. It is also possible to record elongation at a break. Durometer hardness measures material elasticity. Shear testing determines the bond strength.

Fatigue tests reflect the actual service conditions. Compressive strength tests determine the load-carrying capability. ASTM standards govern all operations.

Testing machines will go through a calibration process before being used for the tests. The validity of a product is well ascertained by test outcomes. Essential components undergo rigorous testing.

Surface Finish

The surface finish of liquid silicone injection molding is critical. High-polish molds result in smooth parts. Textured finishes require unique molds. It is important to maintain surface roughness measurements to keep them consistent. Lack of defects on the surface suggests the presence of an appropriate molding environment. Gloss meters measure surface sheen.

Better finishes enhance the performance of the part. The temperature of the mold is essential and determines the quality of the finish. Surfaces are regulated by automatic systems. Regular finishes add value to products.

Quality Importance

Quality in liquid silicone injection molding is very important to guarantee the performance of the end product. The use of precision molds helps to control material waste in the molding process. Defect-free parts enhance reliability. High standards are to be maintained through strict inspections.

Improved processes foster excellence. Consequently, quality failures result in costly recalls. High-quality spare parts are an indicator of customer satisfaction.

Quality, which is achieved in production, fully complies with regulatory standards. Quality investment leads to increased market competition. That is why consistency in quality helps to build trust with the brand.

Common Techniques

Several methods improve liquid silicone injection molding. Cold-runner systems minimize material usage. Hot-runner systems enhance cycle time. Vacuum degassing is a process that helps in the removal of air bubbles. Flash-free molding guarantees component cleanliness.

Overmolding combines multiple materials. In injection-compression molding, stress is significantly minimized. Liquid silicone can easily bond to different surfaces.

Automated systems streamline production. With advancements in technology, techniques are developed.

What Are the Latest Advancements in Liquid Silicone Injection Molding Equipment?

Cutting-Edge Machines

New technologies help increase the productivity of liquid silicone injection molding. Precision pumps enable a controlled flow of material through the system. The new screw-barrel design makes the mixture more homogeneous. Advanced nozzles help reduce the cycle time.

Advanced PLCs handle intricate molding parameters without breaking a sweat. Temperature changes are recorded in real-time using sensors. Newer models of clamps enhance the stability of the molds. Automatic feedback mechanisms correct for deviations as soon as they occur.

Improved cooling channels improve the durability of the mold. Modern interfaces make changes easier for users.

Mold-Making Tech

Advanced technologies in mold-making change the way liquid silicone injection molding is done. The molds made by high-resolution 3D printers are accurate and take minimal time to be produced. Pro enhanced CAD software enhances the mold designs.

Higher performance mold steels increase durability. Optimized venting systems minimize defects. Optimal curing is maintained by dynamic thermal management. The mold geometries that are possible with laser sintering techniques are shown here. Multi-cavity molds boost productivity.

Quick-release mechanisms simplify mold changes. Newer coating technologies help reduce wear and tear.


Automation changes the liquid silicone injection molding industry. There is always a steady supply of material coming into the factory through the automated feeders. Mold movements are made more precise through the use of servo motors.

Integrated vision systems allow for the detection of disparities at an early stage. PLCs facilitate the handling of processes. After molding operations, robotic arms effectively perform post-mold operations. Enhanced conveyors facilitate part transfer efficiently.

Smart sensors are able to control various parameters in real-time. Automated trimming devices are beneficial in terms of improving the flow rate. Centralized control units have a better approach to the management of the systems.

Robotics Enhancements

Robotic upgrades improve the effectiveness of custom liquid silicone rubber injection molding. Fluently and carefully, precision robotic arms manipulate delicate molds. The use of integrated sensors allows for effective placement. Sophisticated shapes are easily handled by automated grippers.

Collaborative robots are designed to share workspace with operators; hence, they are safe. High speed robots decrease cycle time. Robots can improve the order of tasks with the help of artificial intelligence.

Multi-axis robots improve part accuracy. Predictive maintenance systems reduce time loss. Simplified interfaces make programming easier when enhanced.

Equipment Overview

New developments in equipment for liquid silicone injection molding include metering units. Sophisticated controllers handle numerous parameters seamlessly. Advanced screw-barrel configurations create a more uniform blend.

Precision pumps assure controlled material feeding. Newer generation mold clamping systems enhance rigidity. A better cooling system enhances cycle time. Real-time monitoring improves process control. Many systems are incorporated to ensure the safety of operators.

User-friendly interfaces streamline operations. Automated cleaning systems need the least amount of maintenance.


In conclusion, liquid silicone injection molding defines the product revolution by embracing new technology. Technological advancements in machinery and molding techniques transform the process. Explore more at PLASTICMOLD. Embrace the innovation.