Small Liquid Nitrogen Cryogenic Grinder for Plastic and Heat-Sensitive Material Sample Preparation

Product Overview

This compact, all-in-one system integrates mechanical impact, airflow classification, and liquid nitrogen injection to deliver ultra-fine grinding for even the most challenging plastics and elastomers. Designed for both small-scale sample processing and continuous batch production, it efficiently reduces materials with minimal thermal degradation, making it an indispensable tool for quality control and research laboratories.

Primary use cases span across plastics manufacturing, quality inspection, petrochemical analysis, and academic research. Typical materials include PE, PP, PET, PS, PBS, TPU, and various biodegradable polymers and rubbers. The equipment excels where conventional mills fail, providing consistent, fine powders with preserved chemical properties from heat-sensitive or elastic feedstocks.

Built on a foundation of robust engineering and refined through extensive field validation, this unit delivers reliable, low-maintenance performance. Its innovative features—a high-speed motor, fluid-dynamically optimized blade, and precision liquid nitrogen control—ensure exceptional grinding uniformity and operational confidence in demanding laboratory environments.

Key Features

• High-Speed Impact Grinding: A 25,000 rpm motor drives a multi-edge tilted blade engineered with fluid dynamics principles. The blade geometry generates powerful impact forces and a controlled vortex that accelerates material flow, achieving rapid size reduction with D98 fineness down to 100 µm for standard materials.
• Liquid Nitrogen Cryogenic Cooling: Continuously injected liquid nitrogen (via an electric pump) maintains ultra-low temperatures throughout grinding, preventing heat buildup and preserving the chemical integrity of heat-sensitive and volatile materials.
• Screen-Free Wind-Select Classifying: An integrated air-classifying mechanism ensures consistent particle size output without screens, reducing clogging and maintenance. Fineness can be adjusted from 40 to 350 mesh by simply modifying liquid nitrogen flow and feed rate, without mechanical changes.
• Continuous Feed and Collection: The continuous material input and bag-type collection system enable uninterrupted operation, boosting throughput to 0.5–10 kg per hour while minimizing manual intervention and maximizing laboratory productivity.
• Compact Yet Powerful Design: Despite a small footprint (32×25×85 cm) and lightweight construction, the unit houses a 1.8 kW motor and built-in air pump, delivering high energy density and flexibility for space-constrained labs.
• Precision Liquid Nitrogen Control: A stainless steel valve with an engraved opening-angle scale allows precise adjustment of liquid nitrogen flow, ensuring optimal cooling for various materials without waste. The electric pump simplifies operation and reduces labor.
• Durable Low-Temperature Seals: Custom fluororubber seals resist embrittlement under cryogenic conditions, providing long-lasting leak-proof performance and minimizing downtime for replacements.
• Versatile and Easy to Clean: The tilting main body, removable collection canisters, and washable filter bags facilitate quick material changeovers and thorough cleaning. The system can also operate without liquid nitrogen as a standard high-speed grinder for conventional materials, enhancing its utility.
• Optional Upgrades for Enhanced Performance: Choose from a 50L liquid nitrogen tank for extended runs, a self-pressurizing or intelligent liquid nitrogen pump with flow monitoring and auto-drain, or a pre-cooling basket for improved grinding efficiency.

Applications

Technical Specifications

Why Choose This Product

• Proven Engineering Reliability: This grinder is built on a design adapted from a high-speed airflow mill, refined through extensive testing in quality inspection labs and plastics enterprises. Its robust construction and industrial-grade components ensure years of trouble-free operation even under heavy daily use.
• Outstanding Versatility and Efficiency: It excels at both cryogenic and ambient grinding, handling a broad spectrum of materials—from ductile polymers to brittle ceramics—with minimal changeover time. Integrated air-pump, precise liquid nitrogen metering, and continuous operation drastically reduce processing time compared to traditional mills.
• Engineered for Precision and Consistency: The patented multi-edge blade and 25,000 rpm drive produce tight particle size distributions with D98 as low as 100 µm for conventional materials, while adjustable liquid nitrogen flow and screen-free classifying maintain uniform output batch after batch, eliminating human error.
• Low Maintenance and Operator-Friendly Design: Features like the tilt-to-clean body, removable washable parts, and digitally displayed current give operators full control with minimal upkeep. The electric pump automation and safety-focused low-temperature sealing prolong service intervals and enhance user safety.
• Customizable Solutions and Expert Support: With installations across national quality supervision centers, petrochemical enterprises, and academic institutions worldwide, this platform has a proven track record. We offer optional upgrades to tailor the system to your specific needs, backed by commissioning guidance, application support, and responsive after-sales service.

Contact us today to discuss your grinding requirements and receive a personalized quotation or arrange a demonstration with your own materials.