A Mexican plaster producer controls dust at source with a POLYC concentric dual-shaft mixer, a charging hopper, and an optional vacuum feeder for zero-dust charging.
Why virtually all dust originates at powder charging
In the production of putty and plaster products, virtually all dust originates from a single step: powder charging. Whether from bulk bags (FIBCs) or small sacks, every time powder is tipped into the vessel a portion of it never reaches the liquid — it escapes into the air instead. That means material loss and, more importantly, a direct risk to the respiratory health of the operators standing nearby. POLYC offers two progressive solutions for this stage.
Option 1: concentric dual-shaft mixer with charging hopper
For putty or plaster production that needs continuous powder addition during mixing — from bulk bags or smaller packages, according to real-time process conditions — a concentric dual-shaft mixer with a charging hopper is the better-matched configuration.
The machine is designed for medium-to-high viscosity, high-solids materials. In its concentric dual-shaft structure, the frame agitator includes a wall-scraping function that prevents material from adhering to the vessel, while the high-speed dispersing shaft accelerates mixing and dispersion.
The charging hopper is what changes the dust picture: it allows powder to be fed directly and continuously into the liquid phase while mixing proceeds. The moment powder meets the liquid it is wetted and encapsulated — with no chance to disperse freely into the air. The result is a marked reduction in airborne dust, protecting operators at the source.
Option 2: connect a vacuum feeder for zero-dust charging
To take dust control a step further, a pipeline can be connected from the mixer's charging port to a vacuum feeder. Under strong negative pressure, powder is drawn directly out of the bag and into the mixer, conveyed entirely within a sealed pipeline. Closed throughout, with no dust escape and no material contamination, the system eliminates the need for operators to lean over an open vessel at all — true zero-dust powder charging. It is an upgrade path with relatively moderate investment that nonetheless brings the workshop to a genuinely dust-free standard.
Whichever route you choose, the objective is the same: get the powder in — and keep the dust out.
Configuration at a glance
| Item | Detail |
|---|---|
| Industry | Plaster and wall materials |
| Region | Mexico |
| Materials | Putty, plaster, medium-to-high viscosity high-solids products |
| Configuration | Concentric dual-shaft mixer + charging hopper; optional vacuum feeder |
| Key benefit | Powder wetted on contact with liquid — marked reduction in airborne dust |
Where this configuration fits
Complete line designs are covered under the wall putty and car putty production line. The same project is documented as a plaster wall material production line for Mexico with its delivery note in the resource library; the powder-charging principle also applies to the wall putty line delivered to Argentina. Buyers in the region can continue with the Mexico paint and ink equipment selection guide.
If dust control is holding your workshop back, send us your inquiry and we will size the charging system to your powder handling.
Recommended equipment
Concentric Double Shaft Mixer is the relevant POLYC MACHINE configuration for this application.