Filament winding is a manufacturing process based on two steps: winding and curing.
During winding step, resin impregnated continuous fibers are wound on a support (cylindrical, conical or any other circular shape with no falling curvatures). Rotational speed of mandrel and axial speed of winding eye allow impregnated fiber deposition all over the mandrel surface and its total coverage by determining the single winding step angulations.
It is possible to vary the fibers winding tension, the winding angle and the resin quantity according to the designed thickness of the final product.
After winding, the mandrel-piece combination is heated to complete the resin curing process.
KEY BENEFITS
- High repetitive nature of fibers deposition
- Possibility to use continuous fibers
- Facility to lay fibers in each direction
- Possibility to introduce oversized structures till 6.2 meters length and 400 mm ø
- Obtain high VF (volumetric fraction) fiber content.
Lamiflex features three types of autoclaves, guaranteeing the widest production range:
- Autoclave 1 (Vertical): 4 m x Ø1,3m
- Autoclave 2: 5 m x Ø2m
- Autoclave 3 (Vertical): 6 m x Ø1,6m
Before curing and polymerizing in the autoclave, fabric pre-pregs are shaped-cut in a dedicated air-controlled chamber (at R.T.). Pre-preg Layers are wrapped onto mandrels (round, oval or eliptical with desired diameter and length). Shrinkage tape wrap is applied before the final step in the autoclave.
KEY BENEFITS
- Perfect straightness obtained through specific technological methods
- High range of temperature & pressure for epoxy resin curing at 80-180°C
- Rollers, shafts, rods and tubes up to 5800mm length
- Wide diameter range up to 450mm
The roll wrapping process involves wrapping pre-pregs around a metal mandrel, that can be round, oval or eliptical-shaped and that features the desired diameter and length.
The first step of wrapping consists of woven fabric pre-pregs being shaped-cut in a dedicated air-controlled chamber (at R.T.). Pre-preg layers are then wrapped onto mandrels.
Shrinkage tape wrap is applied before passing to autoclave for hot curing and polymerization.
Lamiflex features three types of autoclaves, guaranteeing the widest production range:
- Autoclave 1 (Vertical) : 4 m x Ø1,3m
- Autoclave 2: 5 m x Ø2m
- Autoclave 3 (Vertical): 6 m x Ø1,6m
KEY BENEFITS
- Perfect straightness obtained through specific technological methods
- High range of temperature & pressure for epoxy resin curing at 80-180°C
- Rollers, shafts, rods and tubes up to 5800mm length
- Wide diameter range up to 450mm
Pulltrusion
Continuous profiles are obtained with unidirectional reinforcement fibers
- High-quality FRP continuous profiles guarantee;
- Consistently repeatable mechanical properties;
- Outstanding tensile strength (>1000 Mpa).
KEY BENEFITS
- Optimized mechanical properties and high resistance to bending, tensile and torsional stresses.
- Flexibility in design and possibility to achieve desired final properties by using various materials combinations.
- Possibility to use carbon or glass reinforcement fibers and epoxy- or vinyl-ester resin base for maximum performance.
Pullwinding
Continuous profiles are obtained with adjustable angles.
- Tubolar sections;
- Optimized wall thickness and weight reduction;
- Increased transversal stiffness and strength compared to pultrusion process.
KEY BENEFITS
- Optimized mechanical properties and high resistance to bending, tensile and torsional stresses.
- Flexibility in design and possibility to achieve desired final properties by using various materials combinations.
- Possibility to use carbon or glass reinforcement fibers and epoxy- or vinyl-ester resin base for maximum performance.
Solvent impregnation is a technology used to produce pre-pregs, which are materials made of carbon fiber, glass fibers or other types of reinforcements, which are impregnated with resin.
The procedure is based on the impregnation of a cloth in a resin bath, which is controlled to optimize the weight and adapt the material to a wide range of production needs.
KEY BENEFITS
- Highly automated process
- Best price quality ratio
- Optimization of the mechanical performances of the final product
Resin transfer moulding is a cutting edge technology that combines superior impregnation of reinforcements for the purpose of optimizing the mechanical performance of the product with the production capacity on an industrial scale.
The system involves the injection into a closed mould – under vacuum and pre-loaded with dry reinforcements – of resin with regulated viscosity to ensure that the mould is filled perfectly.
KEY BENEFITS
- High process control;
- High industrialization level;
- Complex geometry net shape for both sides;
- Carbon preforming concept;
- Production capacity on an industrial scale;
- Can be used also for limited series, thanks to the repeatability of the piece;
- Optimization of the mechanical performances of the final product
Press-forming of prepregs with polyester and vinyl ester resin reinforced with glass fibers with random planar arrangement.
KEY BENEFITS
- Suitable for large series and relatively simple planer shapes;
- Optimization of the mechanical performances of the final products
This process allows to produce semi-finished items and finished products with planar geometry and a spatial arrangement of the reinforcements that is fully modifiable along the flat surface and thickness of the laminate, thereby creating laminates with variable stiffness for all needs. Reinforcement fibres with different chemical structures – from carbon to cotton and polyester – enhance mechanical performance and improve the unique properties of different products.
KEY BENEFITS
- Highly automated process
- Best price quality ratio
- Optimization of the mechanical performances of the final product
This process allows to produce semi-finished items and finished products with planar geometry and a spatial arrangement of the reinforcements that is fully modifiable along the flat surface and thickness of the laminate, thereby creating laminates with variable stiffness for all needs. Reinforcement fibres with different chemical structures – from carbon to cotton and polyester – enhance mechanical performance and improve the unique properties of different products.
KEY BENEFITS
- Highly automated process
- Best price quality ratio
- Optimization of the mechanical performances of the final product
