Presentation: The AR-17, the new ARUS Single-seater

6 September, 2017

In early 2017 the “University of Seville ARUS Team” asked us to work with them in the manufacture of several parts of the AR-17 single-seater, as a course project, to be presented at competitions in England, Germany and other European circuits.

After the “2017 Formula Student Germany”, the 2016/2017 season came to an end.

Art-17 is a reflection of the 3 previous cars and a continued improvement that they have been able to enjoy driving in these competitions, with highly positive results, and obtaining excellent scores.

10th position in the Austria Business Plan
12th place in Acceleration in Germany
14th best wet skidpad time in Germany


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The 35th Mollet del Vallès Artistic Skating Festival

6 September, 2017

Christmas celebrations 2016 and for yet another year the Artistic Skating Club of Mollet has held its SKATING FESTIVAL, this year representing THE LITTLE PRINCE.

Once again Modelporex has participated in decorative tasks, with the contribution of figures made with expanded polystyrene.


Letters in Expanded Polystyrene

6 September, 2017

Lend a personal touch to your celebrations, at Modelporex we can make the letters you want, or whatever you like the most.


Inter-urban hydrogen fuel cell car project

1 December, 2016

Creation of 1:1 scale cars manufactured in DN-30 POLYSTYRENE, and an application of Acrylic One that leaves a hard finish.

A project for designing an inter-urban hydrogen fuel cell car. 4 different cars were produced for a British start-up, where Rocket Supreme has been in charge of the interior and exterior design, and the interface of the onboard computer. It was designed in the 16 months, beginning in early 2014. Right now the functional prototype is already running in Britain.


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Agri-Urban European Project in Mollet del Vallès

27 October, 2016




5 February, 2016


Computer numerical control machine with 5 high speed rotation axis.

Machining center with a mobile bridge which slides on an elevated structure, offering great precision without vibrations. Its robust structure allows high sliding axis speeds and excellent finishings.


Real size 2500x1500x1200 mm Real “Z” Gantry System.

Vacuum Table for steel pieces is electro-welded. Linear rail installation

18KW/rpm engine.

Automatic Tool Change Storage.Side Mount 30 pos.HSK-63gun.

Electro-welded table with T-shaped grooves SIEMENS 840 D SL.Control.


Porex, Master paste, Carbon Fiber, Composites, fiberglass, Polystyrene, Resin, Wood, Aluminum.



23 October, 2015

Imagen 275In 2014 the remodeling works of Garduña Square (behind the famous market “La Boqueria”) in Barcelona were restarted.

In July of the said year a Sample Chair made of high-density polyurethane and using mechanization techniques with machines of CNC from a 3D design, is ordered to Modelporex, sl.
The Project was ordered to Modelporex by the company “BREINCOBLUEFUTURE” in Llinars del Vallès.

Once the machining was finished and after passing all the design tests by the Designer (the architect “Carmen Pinos”) the company BREINCO was in charge of making 24 chairs of colored concrete with high-strength mass.

(the white concrete benches in which the chairs are fixed have also been made by Breinco)


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19 July, 2013



Modelporex, s.l.  has reached an agreement  to collaborate with the Enterprise FABROCAM  in order to offer their clients a PROTOTYPED service.





The Stereolithography is one of the ionizing techniques in the market. This technique triggers a process of polymerization through a UV laser incidence of a few milliwatts. The points targeted by the laser beam solidify, creating a consistent layer in the cutting shape that corresponds to each height. The 2D geometry of every cut or layer leads the movement of two galvanometric mirrors that reflect the laser beam onto the work surface. When the layer finishes, a piston goes down mechanically, allowing it to be covered by the new liquid layer with the desired thickness to continue the process.

This solidification is being carried out through layers until the piece is completed. Afterwards, a post-cured stage is required for the piece to be totally solidified. This treatment is carried out in an oven under ultraviolet light. 





The materials used to manufacture the prototypes through the Polyjet Technology are photosensitive resins that are placed in liquid state and hardened thanks to the UV rays, in other words, they cure with solar light. The dimensional precision (0,1mm) and the quality in the details and the superficial final stage are optimal when the machine works with a layer height of 16 micron. This way the obtained pieces are totally valid for commercial presentations, exhibitions, etc.

Nowadays, the possibility of working with two materials simultaneously has been developed with this technology.



Through this technology and from CAD 3D files functional prototypes are manufactured in Polyamide material. The sintering system uses a laser to unite some particles of plastic powder so it constitutes a piece through the powder. Like all prototyped technologies, it works with layers, in this case, powder layers

The powder itself that has not been united is used as a support for the cantilevered parts of the design. This technology has the possibility to work on several materials and even to incorporate fibre charges to provide it with more resistance to the prototypes.

The superficial final stage is rough but the prototypes functionality is good. The colour of the pieces is white. The prototypes cost is cut down meaningfully since some sets can be sent to be carried out in a single cask. 





For enterprises that want to produce their own fast prototypes but do not wish to carry out a big economic investment in a RAPID PROTOTYPING system, FDM turns out to be a good alternative.

Like in the previous systems, the parting element is a tri-dimensional CAD model, which is chosen by horizontal drafts and whose sections are transferred to the “Rapid Prototyping” machine where the piece will be manufactured.

The thermo-plastic material, in a semi-smelted state, is extruded through a nozzle and placed layer by layer until the model is completed. The header of the machine is fed through thread-shaped material. In the header, this material is heated up to 1º C above the smelting temperature.

When the material is placed by the header, it puts a determined pressure on itself, achieving, on the one hand, that it gets immediately welded with the previous layer and, on the other hand, the desired layer thickness.

The used temperatures in this process range from 70º C to 140º C.

The material is found initially in thread bobbins of 1.8 mm (0.07”) of diameter and in two kinds: a) the material of the piece itself, and b) the support, material of the same nature but more fragile. The existence of the support in the prototype manufacturing is essential in this kind of technology. The amount involved in every one of the materials varies depending on the shape and orientation of the piece during its conformation, avoiding breaking and deforming.





The characteristics of plastic injection moulding are as different as the components, which makes it difficult to discuss global solutions for all the companies in the industry. The precisions, superficial final stages, etc.. are very different between a moulding destined to the manufacturing of telephone connectors or medical equipment and another destined to be a car bumper.

However, the industry feels the constant pressure of delivery dates every day becoming shorter and shorter and with quality requirements that 5 years ago were inconceivable.

The High Speed Machining consists of the optimization of the machining with the existing possibilities limited by the piece/ material to mechanise and tools- machines (CAD/CAM-CNC) available. This could imply mechanising at cutting speeds from 5 to 10 times higher than the ones that are used in a conventional way “for every material”.

The High Speed Machining tends to substitute the coating of great depths at low cutting speed for more and faster coating with less depth in the cut, obtaining a considerable increase of removed shavings (material volume per time unit).

High cutting speeds and high advances decrease the cutting power due to shavings that are becoming smaller and smaller.




Vacuum Casting is obtained through the smelting of the silicone via a master model that once extracted allows us to have a soft moulding over which we can carry out the vacuum casting of the desired material.

A master model is carefully prepared, carried out usually by SLA or SLS, to obtain the junction plane and to assure a good final stage of the surfaces. Afterwards, the silicone smelting takes place around the master moulding.

Once the silicone has been hardened, the moulding is cut according to the junction plane and the master model is extracted, leaving a cavity to smelt copies. Due to the silicone flexibility, the little sloped cuts do not raise big problems when it comes to separating the moulding parts.

To carry out the copies, bi-composed polyurethanes are used. To avoid the apparition of air bubbles, the moulding is carried out in a vacuum so it is possible to produce high quality pieces at a higher speed. A wide range of polyurethanes with different characteristics exists, ideal for the manufacturing of the prototypes that can be used for functional testing under several conditions, such as mechanical and thermal testing or environmental-chemical testing.

The smelting of other materials can also be possible, for instance silicone. However, due to the viscosity of the silicone, this technique differs from the traditional smelting process. For silicone smelting different presses are used that allow the insertion of the silicone inside the silicone moulding. The silicone moulding is not too expensive and it offers great exactitude in the final stage, so the pieces manufactured with this technique are ideal to carry out the prototypes and small series.










7.-RIM – Reaction Injection Moulding

RIM (Reaction Injection Moulding) is a technique to produce plastic pieces through injection with low pressure of thermo-stable resins in moulds.

Different moulds can be used, however, resin moulds are the most frequently used ones.

Moulds are mainly carried out for small series built from a manufactured model through fast prototyped methods.

If you are in need of tangible prototypes essentially functional or assembling, this might be the technology that you need. The pieces that can be obtained can be of large dimensions, resistant, they can be tested, mechanised, they can receive subsequent treatments (sand blasting, depostitions, metallic treatments,…) and paint. We emphasise the flexibility of the obtained models, although not in a multi-directional way.

Polyurethane resins, with their different formulations, allow us to obtain a variety of plastics, from elastomers to polycarbonates.

Modelporex in “Industrial robotics what is to offer for the PYME”

8 July, 2013

INDUSTRIAL ROBOTICS, what is to offer for the PYME* Industrial Policy Commission (Robotics Work team) and PIMEC
Monday 17th June in 2013
At 18:00h, in the PIMEC headquarters, 174 Viladomat street, Barcelona.

*Small and middle-sized enterprises
In the current situation of generalized crisis of interior markets there are a lot of Catalan companies that – if they have not already done it- have definitely focused on the internationalization. Nevertheless, here as well as abroad, we have to compete, therefore the quality and cost of the product continues being a key aspect for the company success. For more than twenty years industrial robot use has been developing as the most effective formula when it comes to automating the manufacturing processes everywhere, offering, among other advantages, improvements in the quality of the products and reduction of the costs. Additionally, what nobody doubts when talking about big companies and big series has created a lot of controversy in small and middle-sized companies.

In the lecture – jointly organized by PIMEC and the Industrial Engineering Association of Catalonia, EIC-, we will hear experiences of PYMEs that use robots in their manufacturing processes, which advantages and difficulties they have faced as well as the engineering and manufacturing suppliers’ point of view of this currently mature technology.


- Cristobal Vela, Robotics Applications in ABB

- Jordi Ribatallada, in charge of ASCAMM’s Robotics

- Marc Mont, Executive Director Metal Tube Forming

- Claudia Pi, Manager in Modelporex, s.l.

Moderating the lecture: Pere Homs, Member of the Robotics Work team, EIC

The red car has given David all of his superpowers back

11 January, 2013

When David, who has cerebral palsy, grew too big to use his toy car he gradually started to lose his spark. Now, at eleven years old, and thanks to a teacher of the Jesuit school in El Clot (Barcelona), he has a ride-on toy that makes him more autonomous than a wheelchair.

“Do you know who Antonio is? He’s my friend, he has lots of children and he’s making me a red car,” explains David, an eleven year old boy with cerebral palsy. In fact, Antonio is a teacher of the mechanical manufacturing course at the Jesuit school in El Clot (Barcelona) and the children are his ten pupils. The history of the red car started in December of last year (2011) when a mother concerned about her son called a radio show and it had its “dream” ending in mid-July when David was able to get back on a ride-on toy modelled on the red car that he used when he was small.

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