Vertical Mixing Dryer
Rumtoo’s vertical mixing dryer combines high-volume blending with precise hot-air drying so plastic granules, masterbatches, and fillers are ready for downstream injection molding or pelletizing with consistent moisture levels.
- Simultaneous mixing and drying
- Tool-free stainless barrel & blades
- Layered safety interlocks and sensors
Two Core Functions, One Drum
Designed for multi-color plastic granules and masterbatches, the vertical mixing dryer combines controlled hot-air drying with continuous agitation so additives disperse evenly and moisture stays on spec.
- Dries granules uniformly through the full material bed.
- Keeps material circulating to prevent dead zones or color streaks.
- Reduces heat loss so more energy goes into the resin.
Stainless construction with insulated chamber and observation window keeps the process visible and controllable.
Key Benefits
Give your downstream equipment a steady supply of resin that is dry, homogeneous, and ready on time—without overcomplicating day-to-day operation.
Stable Drying Performance
PID-controlled heaters and insulated walls help you hit target moisture levels shift after shift, even when ambient conditions fluctuate.
High Throughput, Small Footprint
Vertical construction and continuous circulation handle large batch volumes while keeping floor space and energy consumption under control.
Easy, Safe Operation
Low loading height, safety interlocks, and quick-clean stainless chambers shorten changeovers and support safe maintenance routines.
How the Vertical Mixing Dryer Works
A repeating lift-and-fall motion plus PID-controlled heating give every pellet the dwell time needed for precise moisture removal.
Plastic granules enter through the hopper, catch the spiral blades, and ride upward to the barrel’s top before umbrella-spreading toward the walls.
Material drops back through the center screw conveyor, creating a continuous circulation loop until each batch is thoroughly blended.
A blower feeds the electric heating box, and a PID controller keeps temperature steady so heated air penetrates the resin bed and strips moisture efficiently.
Watch the Vertical Mixing Dryer in Action
See how resin flows through the screw, mixes with additives, and dries evenly before it feeds your downstream machines.
From Drying Pain Points to Stable Output
Many plants fight inconsistent moisture, long changeovers, and color variation when drying and mixing resin in separate machines.
- Drying temperature drifts with ambient changes, causing bubbles, brittleness, or surface defects.
- Separate mixers and dryers add extra handling steps and contamination risk.
- High hoppers and difficult cleaning slow color and material changeovers.
How the Vertical Mixing Dryer Helps
- Integrated mixing and drying reduce transfers and keep pellets moving in one closed system.
- Insulated barrel and PID loop stabilize temperature within the recommended window.
- Detachable stainless internals and low feed height speed up cleaning and changeovers.
Construction Highlights
The vertical mixing dryer combines a stainless flow path, insulated barrel, and ergonomic layout to support reliable, everyday production.
- Safety & Protection: Electronic safety devices and interlocks help protect operators and equipment on every batch.
- All-Stainless Contact Surfaces: Barrel, blades, and discharge components are made from corrosion-resistant stainless steel.
- Insulated Barrel Design: Dual-layer construction with optional insulation reduces heat loss and improves energy efficiency.
- Efficient Mixing Screw: Direct-drive, low-noise screw lifting keeps material moving for uniform mixing and drying.
- Ergonomic Vertical Layout: Compact footprint, low feed port, and mobile base make loading and relocation easier.
- Durable, Serviceable Build: Stamped covers, robust reducer, and accessible internals support long-term, stable operation.
- Controlled Discharge: A manual discharge valve makes it easy to empty batches accurately.
Key Technical Parameters (Typical)
Representative parameters for a 10,000 L / 5 t vertical mixing dryer. Other volumes and power packages are available on request.
| Specification | Value (Reference) |
|---|---|
| Main motor power | 7.5 kW |
| Heating power | 60 kW |
| Blower power | 4 kW |
| Discharge / feed screws | 3 kW (discharge screw), 2.2 kW (feed screw) |
| Working volume | 10,000 L (approx. 5 t) |
| Barrel & blade thickness | Barrel wall 3 mm; main screw blades 3 mm |
| Barrel dimensions | Diameter 1,500 mm; height incl. cone approx. 5,200 mm |
| Feed screw dimensions | Diameter 260 mm; blade thickness 2.5 mm |
| Agitator shaft / outer diameter | Shaft Ø 89 mm; outer spiral Ø 270 mm |
All parameters above are for reference only. Rumtoo can customize power, dimensions, and capacities to match your specific process requirements.
Typical Applications
Use the vertical mixing dryer anywhere you need consistent, ready-to-use resin batches feeding downstream extrusion, injection, or pelletizing equipment.
Injection Molding & Extrusion Lines
Pre-dry and homogenize virgin and regrind pellets before they enter injection molding machines, extrusion lines, or compounding extruders.
Color Masterbatch & Additive Blends
Mix base resin with color masterbatches and processing aids to achieve stable color and rheology across the entire batch.
Centralized Resin Preparation
Serve multiple machines from one centralized dryer-mixer, reducing labor and improving process control in larger plants.
Operation & Maintenance Roadmap
Follow these field-proven checklists to keep the vertical mixing dryer running safely from installation through daily production.
Inspection Checklist
- Verify mixing blade tightness and apply fresh lubrication where required.
- Confirm power wiring, open the lid, and remove foreign objects.
- Match supply voltage to the nameplate before energizing.
- Run a no-load test to confirm blade rotation, vibration level, and noise.
- Inspect rotating parts for smoothness and clear blockages near the main shaft.
Operation Instructions
- Install the unit on a stable foundation; add anchor bolts if required.
- Check motor rotation when wiring three-phase power.
- Allow a 2–5 minute empty run to confirm normal operation before feeding material.
- Set mixing time and target temperature; the controller stops heating automatically at the setpoint.
- Adjust drying temperature and duration for each resin, then press stop or OFF when the cycle ends.
Maintenance & Care
- Disconnect the main power before any service work.
- Grease bearings weekly with ZL-2 lithium-based grease.
- Use white mineral oil or diesel to clean contact parts before color changes.
- Ask qualified technicians to diagnose electrical protection faults before restarting.
Why Choose Rumtoo’s Vertical Mixing Dryer
Compared with traditional single-function dryers or open-top mixers, Rumtoo’s integrated design simplifies the process and improves consistency.
| Aspect | Rumtoo Vertical Mixing Dryer | Conventional Solutions |
|---|---|---|
| Drying & mixing | Integrated drying and mixing in one insulated barrel. | Separate units with extra transfers and handling. |
| Temperature control | PID controller and insulation maintain stable setpoints. | Simple thermostats more sensitive to ambient changes. |
| Cleaning & changeover | Detachable stainless blades and chambers for fast cleaning. | Complex internals that trap material and take longer to clean. |
| Footprint & layout | Vertical design concentrates capacity in a compact footprint. | Horizontal mixers and dryers occupy more floor space. |
| Operator safety | Interlocks, low loading height, and clear observation windows. | Higher access points and fewer integrated protections. |
What Customers Say
Plants using Rumtoo vertical mixing dryers report more predictable startup and fewer material-related interruptions.
“After switching to the vertical mixing dryer, our color change times dropped and moisture complaints from the molding shop almost disappeared.”
“The stainless construction and easy access make it straightforward to keep the equipment clean, which is critical for light-colored and medical packaging grades.”
“Energy consumption per kilogram went down because we are not reheating the same air or losing heat through uninsulated walls.”
Frequently Asked Questions
What materials can the vertical mixing dryer handle?
The dryer is designed for plastic granules, regrind, masterbatches, and compatible fillers. For powders with poor flowability or materials containing solvents, consult Rumtoo engineers to confirm suitability and settings.
How do I set the drying temperature and time?
Use the resin supplier’s recommended drying window as a starting point, then dial in the PID temperature controller and timer accordingly. Avoid overheating to prevent yellowing or degradation, and extend time instead of temperature for very wet material.
Can mixing and drying run at the same time?
Yes. The screw-lift design keeps material in motion while hot air passes through the bed, so the dryer can mix colors and remove moisture in a single cycle. You can also run mixing-only by disabling the heater.
What daily checks are recommended?
Before each shift, inspect blade fasteners, listen for abnormal noise, confirm interlocks work, and remove any residual material from the barrel. Follow the weekly lubrication schedule to keep bearings and reducers in good condition.
Can the dryer be integrated into an automated line?
The vertical mixing dryer can be paired with conveying, centralized feeding, and pelletizing systems. Optional level sensors and control signals allow it to communicate with upstream loaders and downstream machines.
Configure Your Mixing Dryer
Share target batch sizes, resin types, and desired dwell times. Rumtoo engineers will recommend the optimal heating package, insulation level, and automation ties.
- 24/7 technical hotline and remote commissioning support
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Connect the whole line
- Global spares for motors, reducers, heaters, and sensors