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LSR Overmolding Machines

LSR Overmolding Machines for Silicone Component Manufacture

Fixed 1:1 ratio metering, mixing and molding - from benchtop development to production scale.

Our LSR machine platform pairs precision metering and mixing with a dedicated molding press, so silicone component manufacturers can move from formulation testing to production without changing suppliers. Choose the Benchtop Meter/Mix for R&D and low-volume runs, the Production Meter/Mix for full-scale 2-component dispensing, or the 8-Ton Molding Press for fast-cycle, cleanroom-ready molding. Available in industrial and medical grades. Every LSR overmolded part - from silicone-tipped connectors to medical device components - comes off the same qualified overmolding machine, so validated formulations move from benchtop to production without re-qualification.

Request the DatasheetCompare the Machines
LSR overmolding machine
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Mixing RatioFixed 1:1
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Viscosity Range50,000 – 10M cps
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Output PressureUp to 5,000 psi
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GradesIndustrial & Medical
The Platform

How the LSR Machine Platform Works

Liquid silicone rubber ships as two components that must be metered at a fixed ratio, mixed without introducing air, and delivered at controlled pressure into a mold or dispense point. Our meter/mix systems handle that ratio control and mixing pneumatically, with no electrical utilities required beyond standard shop air.

The 8-Ton LSR Molding Press pairs with either meter/mix system to close, heat and cure the mold on a fixed cycle. It is a pneumatic heated-platen press with no injection unit, built for fast-cycle silicone and polymer overmolding rather than high-pressure injection work.

Because the benchtop and production systems share the same 1:1 fixed-ratio metering principle, formulations and process parameters developed on the bench carry forward directly to production scale.

This is the metering system silicone manufacturers specify when formulations must scale without re-validation - straightforward lsr molding equipment with no proprietary consumables or specialized utilities beyond shop air.

Compare The Platform

One Platform. Three Machines.

Every meter/mix system shares the same fixed 1:1 ratio principle, so formulations scale bench-to-production without re-validation. Pick the machines that match your scale and process.

Benchtop LSR metering and mixing system

Benchtop LSR Metering & Mixing System

Compact 1:1 fixed-ratio metering and mixing for formulation development and low-volume runs. Cartridge-fed, ~50 lbs, fits on a standard bench.

Best for: process development, formulation screening, low-volume production.
Benchtop Meter/Mix
Production LSR metering and mixing system

Production LSR Metering & Mixing System

Full 1:1 fixed-ratio metering and mixing at production throughput, up to 600 cc/min output, pail-fed for continuous runs.

Best for: production-scale silicone component manufacture, industrial and medical grades.
Production Meter/Mix
8-Ton LSR molding press

8-Ton LSR Molding Press

Pneumatic heated-platen press, 8 tons clamping force, fast 1 in./sec clamp speed. No injection unit - pairs with either meter/mix system.

Best for: fast-cycle silicone and polymer molding, tubing, connectors, medical device overmolds.
8-Ton Molding Press

At a glance: Benchtop vs. Production

BenchtopProduction
Mixing ratio1:1 fixed1:1 fixed
Viscosity range50,000 - 2M cps50,000 - 10M cps
OutputUp to 50 cc/strokeUp to 600 cc/min
Output pressure0 - 3,000 psi0 - 5,000 psi
Feed system20 oz Semco cartridge5-gallon pail
UtilitiesPneumaticPneumatic
GradesIndustrial & medicalIndustrial & medical

Why teams choose this platform

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One qualified platform

Bench-to-production consistency on the same fixed ratio principle.

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Fixed 1:1 ratio

No ratio drift to validate across scale-up.

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No injection unit on press

Simpler qualification, fewer wear parts.

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Pneumatic operation

No new electrical infrastructure required.

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Industrial & medical grades

Match specification to application.

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Cleanroom-ready

Designed for controlled environments.

Where The Platform Is Used

LSR Machine Applications

From connector overmolding machine setups to full medical silicone overmolding programs, the platform covers the complete lifecycle of a silicone component program - formulation development through production molding.

Medical device overmolding

Tubing, connectors and hubs overmolded to fit, with industrial and medical grade dispensing.

Cell & gene therapy components

Precise, repeatable metering for closed, small-batch component manufacture.

Silicone tubing & seal production

Consistent 1:1 ratio dispensing across production runs.

Contract manufacturing

Low-to-mid volume runs of LSR overmolded parts on a platform that scales with demand.

Formulation development & scale-up

Validate on the benchtop system, then move directly to production at the same ratio.

Bioprocess component overmolding

Silicone components for single-use bioprocess assemblies and flow paths.

Downloads & Documentation

Request the LSR Machine Datasheets

One short form. Everything you need to specify the LSR meter/mix and molding platform for your process.

  • Benchtop LSR Metering & Mixing System datasheet
  • Production LSR Metering & Mixing System datasheet
  • 8-Ton LSR Molding Press datasheet

Request the Datasheets

Tell us your application and target scale and we will include the right configuration guidance.

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FAQ

LSR Overmolding Machine FAQ

What is LSR (liquid silicone rubber)?

Liquid silicone rubber is a two-part, platinum-cured silicone that ships as separate A and B components, mixed at a fixed ratio (typically 1:1) immediately before molding or dispensing. It cures with heat into a durable, biocompatible elastomer, which is why it's widely used for medical device components, seals and connectors that need to bond directly to rigid plastics or tubing.

What's the difference between the benchtop and production meter/mix systems?

Both use the same fixed 1:1 ratio. The benchtop system is cartridge-fed for development and low-volume runs, up to 50 cc/stroke. The production system is pail-fed for continuous runs, up to 600 cc/min.

Does the 8-Ton Molding Press include an injection unit?

No. The MB-8 is a pneumatic heated-platen press with no hydraulics and no injection unit.

Can I get industrial and medical grade equipment?

Yes, both meter/mix systems are available in industrial and medical grades.

Can you overmold connectors and custom parts?

Yes. The platform is built for connector overmolding and custom silicone components - tubing fittings, Y and T connectors, hubs and other custom geometries - metered and mixed on the benchtop or production system and molded on the 8-Ton Press. Send us your part geometry and application and we'll recommend the right machine configuration.

What utilities do these machines require?

All three run on standard shop air. The press requires a 100 psi air supply.

Can formulations developed on the benchtop system scale directly to production?

Yes. Both systems share the same fixed 1:1 ratio metering principle, so process parameters carry forward.

What is the clamping force and cycle speed of the press?

8 tons of clamping force, a 1 in./sec clamp speed and a 6 in. stroke.

Do I need to buy all three machines?

No. Each is sold and specified independently. Most customers pair one meter/mix system with the molding press.

Is documentation available for qualification?

Yes. Request full specifications using the datasheet button above.