Paint Industry – Automation for Batching, Ratio Mixing & Reaction
We developed a robust automation system for a paint manufacturing setup, covering the entire upstream process — from raw material handling to batch mixing and controlled reaction.
Raw Material Handling
Bulk and semi-bulk materials (solvents, resins, pigments, additives) were managed through:
- Pump and valve sequencing for fluid transfer
- Load cell-based weighing for powder and liquid dosing
- Level sensors and interlocks to prevent overflows and dry runs
Each material’s routing was automated using PLC logic to prevent cross-contamination and enable safe, repeatable loading into mixing vessels.
⚖️ Ratio-Based Batching & Mixing
One of the key challenges in paint production is accurate ratio mixing between multiple ingredients. We designed a batching system where:
- Recipes were created with target ratios (e.g., resin : solvent : pigment)
- The PLC monitored real-time dosing weights or flow rates
- Tolerance checking and auto-correction logic were used to pause or trim dosing as needed
- Manual additions (if required) were logged through HMI with operator confirmation
This ensured the final mixture met exact formulation standards — critical for color, texture, drying time, and adhesion properties.
⚗️ Reaction Control
Post-batching, certain formulations required controlled chemical reactions (e.g., heating, agitation, or solvent blending). We automated this using:
- PID temperature control (if heating required)
- Agitator logic for speed and cycle duration
- Interlocks for pressure and temperature safety
- Dwell time control for reaction completion before transfer
Benefits Delivered:
- Precision in batch-to-batch consistency
- Faster changeovers between product types
- Safer handling of volatile materials with interlocks
- Reduced manual error in weighing and timing