Two-component resin dosing dispenser Comet

PU foamfor high-viscosity mediafor high-filled material

Product overview
The Comet and Hybrid metering machine series from KraussMaffei provide high-performance dosing solutions for processing filled PUR systems. Both systems deliver constant process parameters, modern control technology and high adaptability for demanding applications involving fillers premixed in polyol and/or isocyanate (short glass fibres, melamine, barium sulphate, expandable graphite, etc.). Comet uses servo-hydraulically controlled pistons while the Hybrid combines piston and pump technology for maximum flexibility.

Key capabilities

• Engineered for filled PUR formulations and abrasive fillers
• Precise metering and control for consistent process parameters
• Modular design for configurable customer-specific setups

Comet (piston metering)
The Comet series is a piston metering system (servo-hydraulic or electric) optimized for abrasive and highly filled formulations. It ensures stable shot weight and reproducible process behaviour over long production runs.

• Stable process parameters with filled systems
• Servo-hydraulic piston drive for high dosing accuracy
• Proven tank concept for reliable material supply
• Suitable for high-temperature and heavily filled formulations

Hybrid (pump + piston combination)
The Hybrid series combines pump metering for isocyanate with piston metering for polyol or similar components. This combination yields high throughput with precise delivery rates and shot weights.

• Pump metering for isocyanate and piston metering for polyol
• Precise control technology for superior part quality
• High production and process reliability
• Accurate delivery rates and shot weight control

Use cases and industries
Suitable for automotive, commercial vehicle, medical technology, insulation and aerospace sectors where components require high strength, flame retardancy or filled-material functionalities.

Examples of applications

• Automotive: front bumpers, front spoilers, side skirts, fenders, trim parts, wheel covers
• Commercial vehicles: R-RIM applications and trim parts
• Medical technology: multi-part housings and structural rigid foam components with painted surfaces
• Transport / aerospace: seats and components filled with expanded graphite

Application details (table)
Multi-part housing | structural rigid foam | painted surface
Front bumper | Comet / Hybrid | automotive composite components

Technical specifications

• Metering concept: piston metering (Comet) and combined pump + piston metering (Hybrid)
• Drive: servo-hydraulic (Comet) or modular pump/piston combination (Hybrid)
• Material compatibility: filled polyol and/or isocyanate systems including abrasive fillers (short glass fibres, melamine, barium sulphate, expandable graphite, etc.)
• Control: modern control technology for precise shot weight and delivery rate control
• Design: modular and configurable to customer requirements
• Material supply: proven tank concept for reliable feeding of filled systems
• Performance: high production and process reliability with consistent parameters for filled systems