Process Name
Pultrusion Method
Pultrusion Method Process
Process
- Fiber reinforcement
The desired fiber reinforcement is introduced. At Röchling we offer the following reinforcements:
Glass or carbon fibers in the form of rovings, mats, fabric and glass complexes
Unidirectional roving reinforcement for high tensile/flexural strength
Multidirectional mat complexes for high longitudinal and transverse strength
Combinations of mat/roving/mat for highest mechanical properties
- Impregnating trough resin system
The introduced reinforcing fibers are pulled through an impregnating trough containing a resin system. At Röchling you can choose between the following resin systems:
polyester resin (UP), vinyl ester resin (VE), epoxy resin (EP), methacrylic resin (A) and polyurethane resins (PUR)
Additives include hardening systems, parting agents, antishrink additives, coloring pigments, flame retardants, etc.
- Mold
The reinforcing fibers impregnated with the resin system are heated in the mold and shaped into the desired profile form.
The composite of reinforcing fibers and resin system is heated
The resin system is cured
The profile now corresponds to the cross-section of the mold
- Tandem pull-off
The profile is pulled continuously out of the mold
How fast this is done varies according to the resin type and profile cross-section
- Saw
The profile is cut to the desired length
Key advantages of pultrusion method Automated continuous production
Simple
Efficient
Automation and continuous production
Disadvantages of pultrusion method
Cracks may appear on the surface of the product.