Medical Devices LSR Injection Molding Machine Automotive Components

Product Specification

Liquid Silicone Contact Lens Component Molding Machine Silicone Tweezers Production Equipment

Guangzhou S-Guangyu Machinery & Equipment Co., Ltd a manufacturer in designing and manufacturing the liquid silicone rubber (LSR) injection molding machine. The equipment is widely used in medical supplies, sports equipment, auto parts, food, electronics, baby products, adult products, kitchenware, high voltage cable accessories, insulator liquid silicone rubber products field. Focusing and innovating is to ensure that we can meet our customers’ needs as well as the market of its individual needs.

What is the LSR dosing system?

An LSR dosing system is a specialized piece of equipment used in the manufacturing process to precisely meter and mix two components (A and B) of LSR material before injection into a mold. These systems are crucial for achieving accurate and consistent mixing ratios, which is essential for producing high-quality LSR parts. 

Here's a more detailed look at LSR dosing systems:

Key Functions:

Metering: Accurately measuring the required volumes of component A and B. 

Mixing: Thoroughly combining the two components to create a homogenous mixture. 

Delivery: Transferring the mixed LSR to the injection molding machine. 

Why are they important?

Precise Mixing Ratio:

LSR requires precise mixing of components (typically a 1:1 ratio) to ensure proper curing and desired material properties. 

Consistent Quality:

Accurate dosing ensures consistent product quality and minimizes material waste. 

Material Efficiency:

Optimized dosing helps reduce material consumption and costs. 

Increased Productivity:

High-performance dosing systems can support high-volume production by enabling fast filling speeds and high material throughput. 

Types of LSR Dosing Systems:

Piston Pumps: Some systems use piston pumps to deliver the LSR components. 

Servo-Electric Pumps: Others utilize servo-electric pumps for precise control and synchronization. 

Hydraulic Systems: Some systems employ hydraulic drives for certain applications. 

Static Mixers: Static mixers are often used to ensure thorough blending of the two components. 

Applications:

Medical Devices:

LSR's biocompatibility makes it ideal for medical applications like syringes, tubing, and implants. 

Automotive Parts:

LSR is used in automotive components such as seals, gaskets, and connectors. 

Consumer Goods:

LSR is found in various consumer products, including baby bottle nipples and kitchenware. 

Electronics:

LSR is used in electronic components, particularly in battery production and insulation. 

Key Considerations:

Viscosity:

LSR can vary in viscosity, and the dosing system needs to handle the specific viscosity of the material. 

Flow Rate:

The required flow rate of the LSR material will influence the choice of pump and system design. 

Cleanliness:

Maintaining a clean and contaminant-free environment is crucial, especially in medical and food-related applications. 

Integration:

The dosing system needs to integrate seamlessly with the injection molding machine and other equipment. 

In summary, LSR dosing systems are vital for the efficient and accurate production of high-quality LSR parts. These systems ensure precise mixing ratios, consistent material properties, and optimized material usage across various industries. 

What is the LSR injection molding machine?

An LSR injection molding machine is a specialized piece of equipment used to produce parts from liquid silicone rubber (LSR) through a process called liquid injection molding (LIM). These machines are designed to handle the unique properties of LSR, which is a thermoset material that requires specific processing conditions to achieve proper curing. 

Here's a more detailed explanation:

Key Features and Process:

Dedicated LSR Injection Unit:

Unlike traditional injection molding, LSR machines feature a specialized injection unit designed to handle the low viscosity of liquid silicone rubber. 

Meter Mixing System:

LSR typically comes in two parts (A and B) that need to be precisely mixed in a specific ratio (usually 1:1). These machines have a meter mixing system (often hydraulic or pneumatic) to ensure accurate and consistent material delivery to a static mixer. 

Static Mixer:

The two-part LSR mixture is fed into a static mixer, which combines the components to initiate the curing process. 

Heated Mold:

The mixed LSR is injected into a heated mold cavity, where the heat triggers a chemical reaction that cures the material into a solid, flexible rubber component. 

Precise Temperature Control:

Maintaining the correct temperature in the mold is crucial for proper curing, and LSR machines offer precise temperature control. 

Fast Cycle Times:

Because LSR cures from the outside in, it can often be demolded before the entire part is fully cured, leading to faster cycle times compared to some thermoplastic molding processes, especially for thicker parts. 

Advantages of LSR Injection Molding:

Complex Geometries:

The low viscosity of LSR allows it to fill intricate mold designs and thin-walled sections. 

Lower Injection Pressures:

Compared to thermoplastics, LSR can be injected at lower pressures, reducing stress on the mold and machine. 

High Precision and Repeatability:

LSR machines are designed for high precision and repeatability, making them suitable for producing parts with tight tolerances. 

Wide Temperature Range:

LSR parts can withstand a wide range of temperatures, making them suitable for various applications. 

Excellent Material Properties:

LSR offers good elongation, high tear and tensile strength, excellent flexibility, and good electrical insulating properties. 

Common Applications:

LSR injection molding is used in a wide range of industries, including: 

Medical: Devices like seals, gaskets, catheters, and breathing masks.

Automotive: Seals, gaskets, and other components.

Electronics: Keypads, connectors, and insulators.

Consumer Goods: Baby bottle nipples, kitchen utensils, and various household products.

In summary: LSR injection molding machines are specialized systems that leverage the unique properties of liquid silicone rubber to produce high-precision, durable parts for a wide range of applications.