Case Study

ARRK, SUPPORTING BARCELONA SCHOOL OF DESIGN
For many years now, ARRK has supported engineering
students from Elisava, the prestigious school of design andengineering in Barcelona. In 2021 ARRK were proud tosupport Elisava Racing Team, a group of students whose
project it was to design a prototype electric motorcycle formountain rescue operations!
Over the course of relationship with the university, ARRK has
helped educate and share its knowledge of“RapidPrototyping Technologies” with many students on processes
like stereolithography (SLA), powder sintering (SLS) and CNCmachining technologies. Demonstration parts have also
helped students to understand the degree of precision ofthese technologies, the rendering of the materials, paints,
and the quality of the finishes that can be obtained in 3D
printing. “3D printing & prototyping has become essential inproduct development. All engineering students must now
know the possibilities and constraints of 3D printing
technologies available on the market to carry out theirprojects” - commented Santi Pladellorens, ARRK’s senior
representative with the University.

Dayna Evo electric emergence motorcycle prototype.

So in 2021 the students approached ARRK for help with their Dayna Evo
project, in order to create a 100% electric motocross motorcycle formountain rescue. In addition to the support given to the design of themotorcycle, the students also dealt with the issue of the weight of parts tominimize the vehicle's energy consumption.
ARRK, PROTOTYPE EXPERT IN VEHICLE OPTICS
Given its experience and mastery of complex projects in terms of vehicle
optics , ARRK offered to supply the deflector, side lights, front and rearlights, turn signals and brake lights for the Dayna Evo motorcycle. To meet
the technical specificities of each part, ARRK combined different 3D
printing and prototyping technologies, such as stereolithography(SLA), selective powder sintering (SLS) and vacuum casting and delivered
aesthetic pleasing and functional prototypes.
The side lights of the motorcycle are remarkable from a design andtechnical point of view. They emit a blue light, essential for emergency
vehicles. These prototypes are made using SLA technology, intransparent resin. The latter has been painted white to allow thediffusion of light, to give the illusion of a transparent piece edged in white
and to conceal the blue LEDs fixed inside the optics. The black reflector isproduced using SLS technology.

Dayna Evo electric motorcycle prototype. Side optics on

3d Printing | Prototyping | Vac Casting | Mock -ups | cnc | rapid tooling

PROTOTYPING & MANUFACTURING SOLUTIONSARRK Europe Limited, a limited company registered in England and Wales with registered number 3418673. Its registered office is Caldwell Road, Nuneaton, Warwickshire, CV11 4NG, United Kingdom

Case Study

The Dayna motorcycle deflector was produced in smoked transparent resin.
For the front headlight, being a safety part, we had to obtain a perfectlytransparent and shiny part. After machining a master with very precise details,
we vacuum cast the prototype in polyurethane resin to obtain a very solidpart. As for the reflector, it was made using sintered powder with a chrome
finish applied to reflect the light.
The rear lighting system, consisting of the rear light and the 2 indicators, wasalso made from a silicone mould using a machined PMMA plastic master. We
were thus able to cast complex geometry parts in transparent and smokedresin, which would give the bike a very modern look.

Motorcycle rear light block

Simpler in shape, the front indicators have been printed in SLA clear resin, witha clear lacquer applied as a finish. With transparency being an importantfeature but less so when compared to the front headlight, made it possible tolimit the cost of production of the parts.

GUIDING STUDENT ENGINEERS THROUGHOUT THE
PROTOTYPING PROJECTARRK were delighted to provide technical assistance to the students at every
stage of their project. We gave them advice on:•Improve the design of parts (angles, thickness) to optimize theirfeasibility,•

Design 3D files fully usable by a prototyper•

Choose the relevant technologies according to the complexity of theparts, the expected material rendering and the desire to produce thelightest possible components that are resistant to driving on roughterrain•

Assemble the parts of the motorcycle,•Consider mass production.

Front headlight of the motorcycle –Vacuum casting technology“The collaboration with Elisava University was amazing: its students were both very creative and technically competent. In
addition, they were professional and receptive to our recommendations. I believe that this experience was as exciting for themas it was for us!”, concluded Santi.

For further information on ARRK’s range of services, please contact:
ARRK Europe Ltd
Unit 11, Olympus Park, Quedgeley, Gloucester. GL2 4NF, UK
Tel: +44 (0)1452 727 700 Email: projects@arrkeurope.com

uk.arrk.com
3d Printing | Prototyping | Vac Casting | Mock -ups | cnc | rapid tooling

PROTOTYPING & MANUFACTURING SOLUTIONSARRK Europe Limited, a limited company registered in England and Wales with registered number 3418673. Its registered office is Caldwell Road, Nuneaton, Warwickshire, CV11 4NG, United Kingdom