Instructions for Glass Fiber Pultrusion Machine (Simplified Version)

Glass fiber pultrusion machines are specialized equipment for producing continuous linear composite products (such as profiles, rods, and tubes) by pulling glass fiber reinforcements through resin impregnation and heated molds for curing. The core process involves "fiber pay-off - resin impregnation - mold shaping & curing - traction cutting". Below is the key information organized concisely:

I. Core Components and Functions

Fiber Pay-Off System: Comprises multiple creels holding glass fiber forms (yarns, mats, or rovings, 200-2000tex). Equipped with tension controllers to ensure consistent tension (error ≤5%) during fiber release, preventing breakage or uneven fiber distribution.

Resin Impregnation Tank: Stores and applies resin (epoxy, vinyl ester, or polyester resin) to glass fibers. Features guide plates and squeeze rollers to ensure full fiber wetting (impregnation rate ≥95%) and control resin content (30%-45% of composite weight).

Heated Mold Assembly: A precision metal mold (customized to product cross-sections: square, round, or irregular) heated in zones (120-180℃). It shapes the impregnated fibers and cures the resin, with temperature control accuracy of ±2℃ to ensure uniform curing (curing degree ≥90%).

Traction Unit: Uses hydraulic or servo-driven clamps to pull the cured composite product at a constant speed (0.2-2m/min). Maintains stable traction force to avoid product deformation or cracking.

Cutting System: A high-speed saw (diamond or carbide blade) that cuts the continuous composite into fixed lengths (1-12m, adjustable). Equipped with a positioning sensor for precise cutting (length error ±2mm).

Control Panel: Integrates PLC controls to monitor and adjust key parameters (traction speed, mold temperature, tension), enabling automated operation.

II. Core Technical Parameters

Production Speed: 0.2-2m/min (varies by product size and resin type; faster for small profiles ≤50mm in diameter);

Product Range: Cross-sectional area 10-10000mm², length 1-12m (customizable for longer lengths);

Fiber Content: 55%-70% (mass ratio, adjustable via impregnation tank settings);

Mold Temperature: 120-180℃ (zone-controlled for preheating, curing, and post-curing);

Cutting Accuracy: Length error ±2mm, cross-sectional dimension error ±0.3mm.

III. Operation and Maintenance Tips

(I) Operation Process

Pre-Operation: Install the mold, set mold temperatures and traction speed, prepare resin (mix with curing agent), and calibrate fiber tension.

Production Stage: Start fiber pay-off, let fibers pass through the impregnation tank, then pull them through the heated mold for curing, and finally cut to length via the cutting system.

Post-Operation: Stop the machine, clean the mold and impregnation tank to remove residual resin, and inspect product quality (dimensional accuracy, strength).

(II) Maintenance & Safety

Daily: Clean resin residues from squeeze rollers and mold; check fiber tension controllers and traction clamps.

Regular: Lubricate traction unit bearings monthly; inspect mold wear quarterly (replace if wear exceeds 0.1mm); calibrate temperature sensors semi-annually.

Safety: Wear heat-resistant gloves and goggles when handling the mold; ensure proper ventilation to remove resin volatiles; stop the machine before adjusting mold or tension settings.

IV. Selection Recommendations

For Small Profiles (e.g., rods ≤50mm): Choose compact machines with single-mold stations and basic traction systems.

For Large/Complex Profiles (e.g., structural beams): Select heavy-duty machines with multi-zone heated molds and high-torque traction units.

For High-Performance Products (e.g., corrosion-resistant tubes): Prioritize machines with resin circulation systems and precision temperature control.

V. Industry Standards

Equipment complies with Technical Specifications for Glass Fiber Composite Pultrusion Machinery.

Finished products meet China GB/T 25772 (glass fiber reinforced plastic profiles) and international ASTM D7083 standards, with key indicators: tensile strength ≥200MPa, flexural strength ≥250MPa.