External Gear Metering Pump For Furan Resin

The gear metering pump is a positive-displacement transfer unit designed specifically for self-hardening sand production lines. Engineered for high-viscosity foundry media-such as furan resins, alkaline phenolic resins, and sulfonic acid curing agents-it is ideally suited for the automatic proportioning and feeding requirements of resin sand mixers. Pump bodies are available in 304/316 stainless steel or corrosion-resistant PEEK composite materials; these options accommodate the mildly corrosive nature of resins, effectively preventing media erosion and pump seizure caused by resin polymerization.

The unit offers high metering repeatability, with flow rates linearly adjustable via rotational speed. When paired with a variable frequency drive (VFD) or servo motor and integrated into a PLC automation system, it enables precise control of the resin-to-curing-agent ratio, ensuring consistent sand mold quality and minimizing raw material waste.

Featuring a compact, wear-resistant design, the pump is built to withstand the dusty environments of foundry workshops. It supports mechanical seal or leak-free magnetic drive configurations and offers customizable threaded connections and displacement specifications. Reliable during long-term continuous operation and easy to maintain, it is widely used in automatic resin sand proportioning lines at foundries.

Advantage of external gear pump

Customized for foundry furan resin and curing agent dosing

High metering precision, stable mixing ratio

Multiple material options, anti‑corrosion and anti‑blocking

Support automatic PLC control for sand mixer

Robust structure, low maintenance for dusty workshop

FAQ

1. Q: Can furan resin and its corresponding sulfonic acid curing agent be pumped simultaneously?
A: Yes. The pump system is designed for separate, metered delivery of the two components, with material specifications selected to suit each, thereby meeting the requirements for two-component dosing.
2. Q: Does the metering accuracy meet the mixing ratio requirements for casting?
A: The repeatability of metering ranges from ±0.5% to ±1%, making it fully compatible with the mixing ratios required for the resin sand process.
3. Q: Will the resin cause pump clogging during prolonged shutdowns?
A: The flow path structure is optimized to allow for cleaning during downtime; additionally, a configuration featuring tight clearances to prevent resin solidification is available as an option.

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