CX Series Lifting Dryer – Vertical Lifting Mixer-Dryer

Overview

The CX Series Lifting Dryer (Vertical Lifting Mixer-Dryer) from Chenxing Machinery is a high-efficiency vertical spiral-circulation mixing and drying system designed for the plastic processing industry. It handles raw material blending, color masterbatch mixing, new-and-recycled material combining, and powder additive incorporation — all in one machine.

How it works: Material is fed into the bottom hopper. A central vertical screw rotating at 300 r/min lifts material from the bottom to the top and flings it outward, creating a "bottom → top → periphery → bottom" circulation path. Combined with an optional heating jacket or hot-air system, the Lifting Dryer blends and dries uniformly in a single process.

The CX Series is available in five models — CX-500, CX-1000, CX-2000, CX-3000, and CX-5000 — covering batch capacities from 500 kg to 5000 kg.

Technical Parameters

• Power conversion: 1 hp ≈ 0.746 kW. Actual motor nameplate kW is the governing value.

• Unified rotation speed: All models run at 300 r/min for consistent mixing quality regardless of batch size.

• Voltage: 380 V / 50 Hz three-phase (custom voltage available on request).

System Configuration

Core Features

1. Spiral Circulation Mixing — The vertical screw lifts material from the bottom and disperses it from the top, achieving rapid three-dimensional circulation. Mixing uniformity exceeds 98% within 10 minutes for a 100 kg batch.
   

2. 304 Stainless Steel Construction — All material-contact surfaces — barrel, screw flight, discharge door — are fabricated from food-grade 304 stainless steel, ensuring zero contamination and corrosion resistance.
   

3. Integrated Mixing & Drying — Optional heating jacket or hot-air system turns the machine into a combined mixer-dryer, removing moisture from hygroscopic resins (PA, PET, PC) during blending.
   

4. Digital Timer with Auto-Stop — Set mixing/drying duration on the panel; the machine stops automatically, reducing operator oversight and batch-to-batch variability.
   

5. Safety Interlock Protection — Limit switches on all access doors. If any door is opened during operation, the main motor cuts power immediately, complying with CE machine-safety principles.
   

6. Rapid Batch Turnover — A 100 kg load of plastic pellets plus masterbatch reaches homogeneous color distribution in under 10 minutes. New-and-recycled material blending achieves consistent melt-flow properties.
   

7. Tool-Free Cleaning — Open the bottom quick-access door, blow compressed air for seconds, and the barrel is ready for the next color or material grade. Typical changeover time: under 5 minutes.
   

8. Versatile Material Handling — Effective with virgin pellets, regrind, powder additives, calcium carbonate filler, and color masterbatch, making it the central mixing station in extrusion, injection molding, and recycling lines.

Production Process

Frequently Asked Questions (FAQ)

Q1: How does the spiral lifting mechanism compare to a conventional horizontal ribbon mixer in terms of mixing uniformity?

The CX Lifting Dryer employs a vertical screw that creates a true three-dimensional circulation path — material is continuously lifted from the bottom, dispersed at the top, and returned to the bottom. Unlike a horizontal ribbon mixer that primarily shears material in a single plane, the spiral lift design moves every particle through the entire barrel volume multiple times per batch cycle. At 300 r/min, a 100 kg batch of plastic pellets with color masterbatch achieves a coefficient of variation (CoV) below 2% within 10 minutes. The absence of stagnant corner zones — a known weakness in horizontal mixers — further improves batch-to-batch consistency.

Q2: What color deviation control does the machine offer for masterbatch blending?

Color consistency depends on both mechanical dispersion and time control. The CX Series addresses this with its spiral circulation pattern, which breaks up masterbatch agglomerates through repeated lifting and cascading. The digital timer ensures every batch receives identical mixing duration, eliminating operator-dependent variability. For high-precision color applications (e.g., packaging films or injection-molded consumer goods), the VFD option allows operators to fine-tune screw speed to match specific pellet-to-masterbatch particle-size ratios, further narrowing the color deviation range.

Q3: How is the machine cleaned between material changeovers, and what is the typical downtime?

Cleaning is tool-free and fast. The operator opens the hinged quick-access door at the bottom cone, inserts a compressed-air gun, and blows residual material upward through the barrel. The polished 304 stainless steel interior (Ra ≤ 0.8 μm) minimizes adhesion, so most pellet and powder residues are cleared with a few air bursts. Typical complete changeover — from stopping one batch to starting the next with a different color or resin — takes under 5 minutes, significantly faster than disassembly-based cleaning required by many horizontal mixers.

Q4: What heating and drying options are available for moisture-sensitive resins?

Two options are offered. Option A — Heating Jacket: A double-wall barrel with thermal oil or electric heating elements conducts heat through the barrel wall into the material as it circulates. This is effective for long-cycle drying of hygroscopic materials like PA, PET, and PC, where moisture must be driven off gradually. Option B — Hot Air System: A forced hot-air blower connects to an inlet near the barrel base; heated air passes through the circulating material and exits via a top vent. This configuration suits faster surface-moisture removal. Both options can be specified at order stage; retrofitting on existing machines is also possible.

Q5: How does the safety interlock mechanism work, and what standards does it follow?

Each access door on the CX Lifting Dryer is fitted with a mechanical limit switch wired in series with the main motor contactor coil. When any door opens, the limit-switch circuit breaks, the contactor drops out, and motor power is cut — typically within milliseconds. The interlock conforms to the "positive mode" principle recognized by ISO 13849-1: the safety function is activated by a mechanical break in the circuit, not by electronic logic. An emergency-stop mushroom button on the control cabinet provides a redundant stop path. This dual-layer protection — limit switches for routine access plus E-stop for emergencies — aligns with EU Machinery Directive 2006/42/EC Category 3 safety requirements.

Why Choose Chenxing Machinery?

Chenxing Machinery is a specialized plastic processing equipment manufacturer based in Zhangjiagang, China. Since our founding, we have focused on delivering robust, practical machinery backed by responsive after-sales service.

Complete product ecosystem — Beyond the Lifting Dryer, our portfolio covers the entire plastic processing chain. Browse our Product Center for the full range, including SMF Series Disc Grinding Pulverizer and SMP Series Knives Pulverizer for powder production; NSPC Series Crusher for size reduction; Conical Twin Screw Extruder and High-Output Single Screw Extruder for extrusion; Water Strand Pelletizing Line and Water Ring Cutting Recycling & Granulating Line for pelletizing and recycling.

Downstream extrusion lines — We manufacture complete turnkey extrusion systems, including PVC/WPC Profile Extrusion Line, PPR/PPH High-Speed Pipe Production Line, and PVC/WPC Celuka Foam Board Sheet Extrusion Line. These lines integrate seamlessly with the CX Lifting Dryer as upstream mixing stations.

Auxiliary equipment compatibility — Our Auxiliary Machines range — chillers, auto-loaders, vibrating screens, dust collectors, and shredders — ensures your CX Lifting Dryer fits into a fully automated production cell.

Application-driven engineering — Visit our Application Solutions page to see how we configure mixing, extrusion, and recycling lines for specific end products. Stay informed via our News Center for product updates and exhibition schedules. Learn about our factory and team on the About Us page.

Engineering quality — Every CX Lifting Dryer undergoes a factory-acceptance test before shipment. Our experienced engineers validate mixing uniformity, safety interlock function, timer accuracy, and motor current draw against the specification sheet. We provide installation drawings, electrical schematics, and a spare-parts list as standard documentation.

Global service — With installations across Southeast Asia, the Middle East, South America, and Africa, we understand international logistics and local electrical standards. Custom motor voltages (220 V 415 V 440 V 480 V 60 Hz) are available to match your on-site power supply.

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