Equipment
Vertical screw batch mixer for large-capacity blending, batch homogenization, and color mixing of plastic pellets, regrind flakes, and granular masterbatches.
Reference values for the model or models named above. The confirmed configuration, the capacity basis and the scope of supply are stated in the quotation and the drawings.
Overview
Provides large-capacity batch blending, color homogenization, and lot mixing for plastic pellets, regrind flakes, and granular masterbatches.
The Vertical Mixer Machine (vertical screw batch blender) delivers cost-effective, large-capacity batch blending and homogenization for polymer pellets, recycled regrind flakes, masterbatches, and granular compounds. Designed around a vertical center screw operating inside a conical-bottom silo tank, it rapidly elevates material from the bottom sump to the top spreader umbrella, continuously showering particles downward in a massive cascading circulation pattern to achieve comprehensive volumetric batch uniformity.
Occupying a compact floor footprint while utilizing vertical plant headroom, the vertical batch mixer is the standard industry choice for raw material pre-blending, large-lot color blending, recycled material homogenization, and final compound blending prior to bulk packaging or silo storage. Its gentle tumbling action preserves granule geometry without creating dust or shearing pellets, making it ideal for standard rigid thermoplastics including PP, PE, HDPE, LDPE, ABS, PS, PC, and PET.
Key features
Each picture names one part of the machine and what it does for the material and the batch.
Precision-machined continuous flight vertical screw rotating inside an internal draft tube. Rapidly lifts bottom material upward to create continuous top-to-bottom circulation, turning over a multi-ton batch within 10 to 15 minutes with exceptionally low motor power consumption.
Ergonomically engineered charging port located at floor level with an integrated safety protective grid and a flanged top inlet. Facilitates easy manual dumping of 25 kg bagged raw materials and masterbatches, while seamlessly interfacing with upstream vacuum loaders, screw conveyors, or pneumatic conveying pipelines for dust-tight automated charging.
Fabricated from heavy-gauge stainless steel with steep cone angles (60° or greater) to prevent material bridging and ratholing. Ensures smooth gravity flow of pellets back into the bottom screw intake sump for continuous re-circulation.
Integrated dust-tight IP54 operator control panel equipped with an illuminated Start/Stop push button station, high-visibility twist-to-release Emergency Stop button, and an adjustable digital batch mixing timer (0–99 min/hr). Features automated motor shutdown upon cycle completion and built-in thermal overload and phase-loss electrical protection.
Dual inspection ports: an ergonomic floor-level side cleaning door and a top cover hatch, both protected by safety interlock limit switches that instantly stop the motor when opened during operation.
Material and process
Read the conditions together: a machine is selected for the material and the output, not from its name alone.
Optimized for free-flowing rigid thermoplastic pellets (virgin polymers and compounding granules), color masterbatch pre-mixing, recycled regrind flakes, and pelletized rubber/mineral masterbatches. Compatible with common industrial plastics including PP, PE, HDPE, LDPE, ABS, PS, PC, PET, and PA.
Particularly suited for large-lot batch homogenization (e.g., blending multiple production runs to eliminate color or MFI batch-to-batch variations) and pre-blending virgin resin with masterbatch or regrind prior to extrusion or molding. Standard batch capacities range from 500 kg to 10,000 kg per batch.
Designed for high-volume pellet-to-pellet and pellet-to-regrind blending. Operating limitations include:
Engineered for free-flowing rigid thermoplastic pellets (virgin granules, masterbatch, compounding pellets) and dry regrind flakes with bulk densities between 0.35 kg/L and 1.1 kg/L. Materials must be dry, non-tacky, and free from cohesive fines or pasty moisture.
Input streams must be free of stringy scrap, unchopped purgings, or oversized foreign lumps that could jam between the vertical screw flights and the internal guide tube. Metallic tramp debris must be intercepted via upstream magnetic separators.
Yields a uniformly homogenized, dust-free batch with consistent pellet and color distribution from the first kilogram to the last. Preserves virgin pellet surface appearance without friction shearing or granule degradation.
Discharges by gravity via the conical bottom valve directly into packaging bags, bulk container boxes (Gaylord boxes), pneumatic conveying transfer hoppers, or secondary storage holding silos within 3 to 10 minutes depending on valve configuration.
Throughput
Read a figure together with the basis below it: the same machine reaches different numbers on different materials.
1–20 Ton/Batch
Capacity ratings denote typical batch mass (nominal 500 kg up to 10,000 kg per batch) based on standard free-flowing rigid thermoplastic pellets with a bulk density of approximately 0.55–0.65 kg/L (such as PP, PE, or ABS). Total tank volume is engineered with adequate freeboard space (typically 15%–25%) above the working fill level to allow unrestrained outward parabolic material dispersal from the top distribution umbrella.
Models
The figures are the reference values entered for each model. The model for your line is confirmed against your material and output before it is quoted.
For export orders shipped via LCL (less-than-container load), our small-to-medium vertical mixers are fully wrapped in moisture-barrier PE protective film and secured inside a customized, heavy-duty fumigation-free solid plywood crate. Reinforced internal bracing and tie-downs lock the mixer body and drive components firmly in position, protecting the machine from vibration, shifting, and accidental side impacts throughout long-distance multi-modal ocean and overland transit.
Delivered a complete downstream auxiliary package for an ABS engineering plastics compounding plant in Thailand. In addition to the large-capacity vertical silo mixer, the delivery integrated a pelletizer, a vibrating spiral cooling elevator, a linear classifying sieve, and an automatic weighing and packaging station, demonstrating our proven turnkey engineering capability for demanding resin compounding lines.
Engineered and delivered a customized 10-ton extra-large vertical silo mixer for a post-consumer plastics recycling facility in Chile, South America. Configured specifically for washed regrind flakes, the massive batch blending cycle thoroughly homogenizes incoming bulk materials to eliminate melt index and color deviations across production lots, proving our capability to deliver tailored large-scale mixing solutions for demanding recycling plants.
Scroll the table sideways to read every column →
| Model | Capacity range | Rated power | Dimensions | Volume | Heating power (optional) |
|---|---|---|---|---|---|
| NC-500 | 0.5 Ton/Batch | 4 kW | Ø1200 × 2650 mm | 1000 L | 15Kw |
| NC-1000 | 1 Ton/Batch | 4 kW | Ø1500 × 2800 mm | 2000 L | 20Kw |
| NC-2000 | 2 Ton/Batch | 5.5 kW | Ø1800 × 3250 mm | 4000 L | 20Kw |
| NC-3000 | 3 Ton/Batch | 7.55 kW | Ø2000 × 3750 mm | 6000 L | 30Kw |
| NC-5000 | 5 Ton/Batch | 11 kW | Ø2400 × 4200 mm | 10000 L | 40Kw |
| NC-6000 | 6 Ton/Batch | 11 kW | Ø2500 × 4500 mm | 12000 L | 50Kw |
| NC-8000 | 8 Ton/Batch | 15 kW | Ø2750 × 5100 mm | 16000 L | 60Kw |
| NC-10000 | 10 Ton/Batch | 18.5 kW | Ø3000 × 5350 mm | 20000 L | 70Kw |
Delivery cases
Scope of supply
The quotation states the scope for the confirmed configuration; the groups below describe how a supply is normally split.
Installation planning
These are the connections the machine and the line around it have to agree on before the layout is fixed.
Mechanical: Anchor baseplates bolted to concrete foundation floor; standard top round flanged inlet (DN150–DN250) for pneumatic cyclone receiver or screw conveyor, and bottom discharge slide gate / flanged adapter (DN150–DN200) matching pneumatic pick-up boxes or manual bagging chutes.
Electrical & Automation: Three-phase main power supply connection to the machine control cabinet. Terminal strip provides dry contacts for Run, Stopped, Timer Done, and Safety Interlock Tripped status, supporting automated handshake with upstream feeding conveyors and downstream bagging scales.
The buyer is responsible for preparing a level, vibration-damped reinforced concrete foundation slab capable of carrying the fully loaded mixer weight (including material and dynamic operating torque), verifying overhead roof clearance against overall machine height with inspection cover open, and supplying electrical mains cable to the mixer control panel isolator switch. Upstream material charging chutes and downstream pneumatic pick-up boxes or packaging platforms are coordinated to agreed centerline dimensions.
Spare parts
The parts that wear in normal service, and the spares worth keeping on site. How often a part is replaced depends on the material and the duty the machine runs, so the basis is confirmed for each machine.
Inspect and wipe clean before each batch or per shift; test surface flux intensity annually with a calibrated Gauss meter; replace magnetic tube assembly if surface field drops below 10,000 Gauss or tubes suffer mechanical puncture.
Installed at the manual feed hopper or forced feed port. Composed of high-intensity NdFeB rare-earth magnetic tubes in 304/316 stainless steel housing. Captures fine tramp ferrous particles, wire fragments, and machining debris to prevent screw seizure and barrel scoring. Recommend keeping a spare clean grate for zero-downtime rotation.
Relubricate per maintenance schedule with high-temp synthetic EP grease; monitor bearing temperature and vibration during monthly rounds; replace if abnormal noise, excessive radial play (> 0.15 mm), or spalling occurs.
Premium brand (NSK or SKF) precision spherical roller / deep groove ball bearings supporting the vertical center screw suspension and drive head. High dynamic load ratings and precision metallurgy ensure smooth, continuous screw rotation under full-capacity bulk powder or pellet batch loading. Keep one spare bearing set in clean factory packaging on site.
Inspect electrical cabinet wiring and contactor contacts every 6 months; replace thermocouple probe if temperature readings drift (> ±3°C) or signal is lost; replace contactors upon contact pitting or chattering.
Critical electrical control spares for standard and drying-equipped mixer configurations. Includes digital PID temperature controller, armored PT100/K-type thermocouple probe, heating contactor/SSR, and motor thermal overload relay. Ensures rapid restoration of mixing automation and heating functions without line stoppage.
Inspect the seal lip and its shaft seat at every six-month service, and again whenever grease weepage or powder ingress shows around the drive head; renew the seal whenever the lip is hardened, cut or weeping, and always when the bearings are replaced.
Oil-resistant rotary lip seal locating the center screw shaft where it leaves the drive head bearing housing. It retains the high-temperature EP grease in the bearing cavity and keeps pellet dust and regrind powder out, so a hardened or scored seal is the usual first cause of bearing failure. Order by machine model and serial number.
On belt-driven units check belt tension and sheave alignment monthly and re-tension after the first days of running-in; replace the complete matched set if belts show glazing, fraying, cracking or slip under load, and never mix new belts with run-in ones in the same drive.
Heavy-duty V-belt transmission between the base drive motor and the vertical screw, offered as the alternative to the direct gear-motor drive. The screw starts every batch under load, so worn belts show first as slip noise and slower screw acceleration, and one failed belt quickly takes the set with it. Order as one matched set with the sheaves by machine model and serial number.
Blades, screens and other normal consumables are outside the standard warranty. How a spare part is identified and ordered is set out under Warranty & Spare Parts.
Selection
Work through what you already know. The rest is settled in the conversation, not before the first message.
When selecting a Vertical Mixer Machine, consider the following engineering parameters:
Request a Quote A model name, a material or a drawing is enough to start.
Photos and videos
Tell us the material, the process and what you need to achieve. Technical details can be completed later together with our sales team.
