Introduction to SMC Online Blending System

I. System Overview

The SMC Online Mixing System is a core module in the SMC sheet material production line, designed for the real-time, precise preparation of resin paste (resin + filler + additives) and direct delivery to the fiber impregnation section. This system replaces the traditional batch mixing method, significantly enhancing production efficiency and proportion stability, making it a key equipment for modern SMC production.

II. System Composition and Workflow

Raw Material Measurement Unit

• Function:
• Resin Matrix (unsaturated polyester/epoxy) Quantitative Supply
• Filling Materials (Calcium Carbonate, Talc, etc.) Dynamic Weighing
• Additives (such as hardeners, thickeners, color pastes, etc.) are micro-injected.
• Technical Features:
• Utilizing a weightless scale or a high-precision gear pump, error ≤ ±0.5%
• Supports digital formula management, one-click switching

2. Dynamic Mixing Unit

• Feature:
• Instant homogeneous blending of multi-component raw materials
• Eliminate bubbles and undispersed particles
• Technical Features:
• Static mixer or high-speed dynamic mixing head available
• Mixed uniformity ≥ 99%, no dead corner design

3. Temperature Control Unit

• Feature:
• Thermally controlled resin paste (usually 25-35°C)
• Prevent premature gelling
• Technical Features:
• Plate heat exchanger or circulating water bath temperature control
• ±1°C accuracy

4. Conveyance and Feedback System

• Feature:
• Mixed resin paste is continuously pumped to the impregnation zone.
• Real-time traffic monitoring and closed-loop regulation
• Technical Features:
• Variable-frequency screw pump stable conveyance
• PLC Auto-Compensates Viscosity Fluctuations