LSR Micro Injection Molding Machine Liquid Silicone Micro Parts Molding Equipment for Small High Precision Components

LSR Micro Injection Molding Machine for Small and High-Precision Silicone Parts

Our LSR micro injection molding solution is developed for manufacturers who produce miniature and high-precision liquid silicone rubber components, where part weight is very low, wall sections are thin and dimensional consistency decides the yield. The system pairs a dedicated LSR injection unit with a precision metering package, a temperature-controlled cold runner and a mould designed around the specific part geometry, so small silicone parts can be moulded with stable weight, clean appearance and repeatable dimensions.

Every project is configured around the customer part drawing, target output and mould layout. Clamping force, shot capacity, screw size and automation are selected after engineering review rather than fixed in advance, which keeps the machine matched to the real application.

Micro Molding Technology Inside

• Precision LSR metering: servo-driven A and B component dosing with closed-loop pressure monitoring keeps the mixing ratio stable, so micro parts are filled consistently even when the required shot is extremely small.
• Cold runner with needle valve: the water-cooled manifold keeps the silicone cool and uncured until injection, reducing runner waste and shortening cycle time - a major advantage on small parts where scrap ratio directly affects cost.
• Vacuum-assisted cavity evacuation: available as an option for thin-wall and optical parts, removing air from the cavity before injection to prevent bubbles, air traps and short shots.
• Repeatable injection profile: multi-stage injection speed, holding pressure and curing time are stored as recipes, so the machine returns to the same condition after every mould change and shift handover.
• Static and dynamic mixing: two-stage mixing disperses pigment paste and additives uniformly, which matters for transparent, coloured and optical silicone parts.
• Anti-cure protection: automatic pressure relief and chilled material circulation protect the silicone during machine stops, preventing scorching and blocked needles.
• Operator-friendly control: PLC with colour touch screen, recipe memory, alarm history and production counters, so operators can run the machine with limited training.

Typical Applications

• Medical and healthcare: catheter valves and seals, electrode insulation, syringe and infusion components, orthodontic parts, wound care accessories, infant feeding products.
• Electronics and wearables: sealed connectors, waterproof keypads, watch and earbud gaskets, sensor diaphragms, camera module seals, precision O-rings.
• Automotive: connector seals, charging port and mirror cover gaskets, sensor boots, damping elements.
• Consumer and household: silicone lids, coasters, suction cups, kitchenware seals and personal care components.
• Optical and lighting: light guides, lenses and diffusers produced with high-clarity silicone.

Advantages for Southeast Asian Manufacturers

• Designed for hot and humid climates: cooling capacity, material temperature control and electrical cabinet ventilation are specified for tropical ambient conditions in Vietnam, Thailand, Malaysia, Indonesia and the Philippines.
• Energy efficient: servo hydraulic and servo metering packages reduce power consumption compared with conventional fixed-displacement LSR systems.
• Local support: English-speaking service engineers, remote PLC diagnostics, spare parts supply from Guangdong and fast air freight to major Southeast Asian cities. On-site installation and operator training are available.
• Compact and flexible: a small footprint fits existing factory layouts, and stored recipes make high-mix low-volume production practical.
• Traceable production: parameter logs, alarm records and shot counters support medical and automotive audit requirements.

Configuration and Options

Each system is quoted with a dedicated LSR injection unit, a metering unit matched to your pail or drum supply, a cold runner set designed for your mould, water chiller, mould clamping plate and standard tooling. Options include vacuum kit, pigment metering, drum follower plate, robot take-out interface, mould temperature controller and guarding to your plant safety standard. Mould development can be handled by our partner tool shop or adapted to your existing mould.

Packaging and Shipment

The machine is anchored on a steel frame, wrapped in vacuum moisture barrier film and packed in a fumigation-free plywood case with desiccant. Shipment is arranged from Shenzhen or Guangzhou port to Ho Chi Minh City, Bangkok, Port Klang, Jakarta, Manila and other regional destinations, with packing list, wiring diagram and operation manual supplied with every unit.

Frequently Asked Questions

Can the machine be matched to my part? Yes. Send the part drawing, material hardness and target output, and our engineering team will propose the machine configuration, cavity layout and cold runner design.

Do you supply moulds? We can develop the LSR mould through our partner tool shop, or supply adaptor plates and cold runner connections for your existing mould.

What about delivery and installation? Lead time depends on configuration and mould status and is confirmed in the quotation. Installation, commissioning and operator training can be arranged on site.

Contact Us

Share your project details with our engineering team and we will respond with a tailored LSR micro molding proposal for your production target.