MANUFACTURING PROCESS AND MATERIALS
All bicycles and frames Costantino are a blend of the highest quality pure carbon fiber, and two hybrid fabric composed of carbon Kevlar and carbon titanium, depending on model.
Our bikes are made in Italy, because this country has heritage and tradition of manufacturing excellence products with the latest materials and highest technology, but with a hand-made finished difficult to match anywhere else. The serial number carried by each of our frames identifies the person who has built it and followed throughout the manufacturing process.
The company chosen to produce the frames Costantino has the machinery necessary to produce the molds with the design and geometry made by Constantin This company also manufactures other components where it applies its high knowledge in the use of carbon fiber and the most advanced production technology for manufacturing high-strength components like GP motorcycle aerodynamic deflectors, safety drivers cages and aerodynamic deflectors for Formula cars, boat masts and catamaran nautical hulls, etc …
To better understand the philosophy of the Costantino frames, we will give you information about their manufacturing process and choice of materials. Once Constantíno has made the designs and the molds, together with the factory’s engineers have chosen certain key materials to produce the frames, providing them with sufficient lateral rigidity to transmit effectively the muscular pedaling force without compromising the comfort and handling of the bike.
For the outer layer of fabric is been used a twill carbon fiber 3K (1,500 strands of carbon fiber 3mm2) to achieve high strength and a refined aesthetic.
A second layer of unidirectional fiber STS 180 grams per square meter, which is used to ensure the strength in the longitudinal direction. The characteristics of this fiber are 360kg./mm2 of tensile strength and 23.5 kg./mm2 level of elasticity.
Las características de esta fibra son 360kg./mm2 de resistencia a la rotura y de 23,5kg./mm2 de nivel de elásticidad.
A third layer of unidirectional fiber 40J 150 grams per square meter, which overlaps with different angles to ensure the frame’s lateral rigidity while achieving light weight. This fiber needs to be used in the right amount, because by default the frame does not have sufficient rigidity and having too much would be uncomfortable to ride because it will not absorb road vibration. This layer has a 60kg./mm2 elasticity and tensile strength of 400kg./mm2.
The fourth layer is a fabric of T700 300gr./m2 GK, used against torsion of 450kg./mm2 layer of tensile strength and elasticity kg./mm2 25.5.
The fifth layer of fabric is a hybrid of carbon-Kevlar 200gr./m2, and is used in areas committed to absorb vibrations.
The sixth layer is a multiaxial fabric at 0 °, + / -45 º, 90 º, which is added at the points where this stress by torsion, tension and lateral flexibility at the same time.
The seventh fabric is a hybrid carbon-titanium used in high stress areas such as head tube, in the joints that makes the seat stay tube with the vertical and horizontal tubes, in the joint of the 3 tubes around the bottom bracket, getting an improve of rigidity with low weight. This fabric is used exclusively in the Monocoque X1-TI and X1-MESSENGER.
All the materials we have discussed so far are carefully positioned in the mold with a resin between the layers. After this, the mold is introduced in an autoclave at minor 6 atmospheres of vacuum and a temperature of 140 ° Celsius for a period of 6 hours which will give ours frames a homogeneous structure for high performance.