Category Archives: CAM

Temple of the Natural Delights; constructing abstract seduction

The aim of the project is to accelerate the transition towards a longer lasting society. A new narrative is advocated to engender the desire for a sustainable future. Within this new narrative, temples are situated in the great metropolises of the world to propagate ecological thinking. The aesthetic and architectonic expressions throughout the public and private realms embody an ethic that endeavours to seduce one to live this new lifestyle. The building and its context are an autarkic unity; designed to satisfy the user’s needs through the use of natural principles in synergy with the ecosystem. Building physics, construction and material considerations form the basis of the generic design. The building materials are recycled and absorb greenhouse gases, thus counteract climate change. Its archetype is to be adjusted depending on the geo-specific context and climate of the proposed temple, creating a network of true localised altars to the Natural Delights.

Due to the holistic approach to the design of the building it was important to show the complete building in a 1:200 scale model. One of the results aimed for with this project is to provoke in order to create discussion; how should architecture behave in times of ecological crisis? Thereby it will hopefully contribute to the architectural discourse. With this goal the model could contribute by seducing its viewers, therefor a certain level of expressive aesthetics needed to be achieved. At last the model functioned as constructional test. The gypsum 3d printed elements in the model compare with the 3d printed ‘Ferrock’ elements in the design. Even so the lattice beam construction functions with an actual pressure ring in the model. No glue is used and therefor resembles how it will work in reality.

A big question in the whole process was how to make the model of such an extraordinary design. The double curved geometry with these small sizes where only able to construct by 3d printing. I chose for the gypsum printer, because it is so refined and thereby has a beautiful appearance. Also it prints faster than the plastic printer. On the other hand it is expensive, fragile and time consuming to dig out the prints. The printer lays layers of powder and with a laser solidifies the volumes. When the machine is finished there is a block of powder with the solid piece inside. One really has to dig the print out and clean it as an archaeologist. After it’s cleaned a hardening spray can finish the printed elements in order to gain strength. A couple of layers can be applied, not too much, in order to keep the pleasing texture of the gypsum.

The base of the model was CNC milled out of a block of cross laminated pine wood, subsequently sanded and adjusted by hand in order for the 3d prints to fit. A total of six prints where needed to build the model, because of the limiting size of the printer. Gypsum can’t bear bending forces; therefor I introduced small wooden sticks inside the model to maintain stability. All the printed elements where modelled in rhino. The 3d printing program needs to have digital 3d models with closed edges; otherwise it is not able to print. With these organic shapes it can be hard to ban all ‘naked edges’. The wooden structure around the 3d printed part of the model cut by lasers. Due to the fact that it is such a small structure I chose to layer the beams with a Perspex frame on the inside; to gain strength and two layers of veneer on the outside; to maintain a certain aesthetic. For the tension cables is chosen for brass threat which is wired in-between the layers. It is inherent to every scale model to be an abstract representation of reality. Different levels of abstraction could be used depending on the specific story one wants to advocate through the architectural model. During the process it became clear that this model required a certain level of abstraction. Although the model is incomplete it contains an aesthetic value through its purity and functions as an expression of construction.

Het Platte Land-Colour and Tactility

The project proposes an alternative way to deal with the changing countryside of Groningen, the Netherlands. Instead of conserving the old, the proposal embraces new changes on the countryside to enrich the existing qualities of the landscape. The project consists of three equal big volumes, whose scale is put in relation to the big polder. In doing so the volumes can be experienced big and small simultaneously. By structuring all volumes introvert, the outer façade could be totally devoted to the surrounding landscape.

To summarize it was important to show the relation between the building and the polder landscape in my final model. Colour and tactility played an important role in this relation and I will therefore elaborate on both aspects. The model shown here is a 1:200 scale model with a size of 1400mm square.

 

 

 

 

Colour

To emphasize the relationship between the building and the landscape I decided to use realistic colours. To make a proper colour palette it is important to make multiple tests to see how the colour looks on the material and to see how all colours fit each other.

The red inner courtyard is made of concrete combined with red oxide pigment. Because it is hard to make small tests and copy the proportions exactly, I made a mould that could easily be reused. The mould was made of a laser cut in 0,4mm MDF with a layer of Vivak vacuumed on top. I sanded the Vivak to prevent the concrete of having a shiny surface. I used little nails to make holes for trees that were planted later.

For the process of pouring concrete its important to slowly add water to the cement and keep constantly mixing it. When the mixture is good (liquid, but not watery) you can add the pigment slowly and again keep mixing it. If you pour the concrete into the mould you can shake the mould (or softly tap it with a hammer) to fill the whole mold, equalize the surface and remove air bubbles. Do this again after 20 minutes or so.

In total I made three versions with three different colour tones. As advice I could say that you should not be too shy with the pigment and that the colour becomes lighter when the concrete dries.

Tactility

It was also important to show the difference between the rough landscape and the clean interior of the building. Therefore all elements of the building have been cut by a laser cutter, painted and assembled quite precise.

In contrast the landscape was mostly cut and assembled by hand. The base was of 9 mm MDF with corrugated cardboard to resemble the farmlands and a synthetic fibre mesh for the texture created by concrete tiles. I mixed the wall paint with potting soil and sand to roughen the surface. I used a round brush to dot (not stroke) to get a nice surface. Afterwards I sprayed the landscape elements with three different tones of green to create tone differences and an illusion of depth.

The facade was a bit tricky, because it had a curve in two directions and had multiple surface finishes. I decided to 3D print the base form of all four facades and from there treat the surfaces.

To fit the 3D printer, every facade element was printed in three loose parts. These three parts were glued together and the seams were finished with filler. Because 3D printers work in layers, the surface had a layered texture. To remove this texture, the elements were sanded multiple times and sprayed with Motip Spray-Putty. In this way slowly all ribs were filled and the surface became smooth.

However the upper part of the facade resembled reed and therefore needed a rougher surface than the lower part. Therefore I sprayed the upper part with spray-glue and afterwards lay it in a bed of fine sand. In this way you can easily add a thin layer of sand to a surface. So when the facade had the right tactility I could easily spray paint the whole facade element in the right color.

For me making this model was a nice way to experiment with different techniques, colours and textures to create various surfaces. By making quick and small tests (or take a look in the Cam-lab library) I could easily develop multiple variations. In doing so I could emphasize important aspects of my design.

Text, photos and model by Tiemen Anema

The City as Canvas, Architecture as Painting

The following text is how Tiwánee van der Horst describes her graduation project in relation to the modelling techniques she used to accommodate a time lapse movie.

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The design for my graduation project was an organic structure where the shape was a result of a three dimensional translation of painterly movements and textures within a narrow alley. With my final model the aim was to show the designed building process through a time-lapse (see movie). For this it was needed to make a transparent surface onto which I could paint, so in the movie it would look like it was extruded in mid air.

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The options were either to 3D print the complex shape with a transparent filament or to deep draw with transparent Vivak. However the filament would never be entirely transparent. Therefore I decided to use transparent Vivak for deep drawing. For this it was necessary to make a mold through CNC milling. I divided the design into separate parts, which could then be laid out horizontally for deep drawing, after which all the parts could be glued together, creating the transparent paint surface.

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The rhino file was prepared for the CNC milling process by the CAMlab. Because the deep drawing shows every single inaccuracy of the mold we let the CNC milling machine run multiple times until a smooth surface could be made out of the material. To prepare the mold for the deep drawing process it is necessary to create air holes through the block from the deepest points in the mold. To find these points I used a little ball from a bicycle wheel. After having found all the deepest points, the next step was to drill the holes through the block. The holes needed to be as small as possible other wise the holes would show in the surface of the Vivak. As the block was about 11 cm high it was not possible to drill through the block with the 1,5 mm drill. From the back I used a drill with a larger radius. However this process resulted to be to tedious and to risky. We needed to find another way.

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With the help of the staff of the modeling hall we found a bicycle spoke with which we could drill small holes through the entire block height.

 

 

With all the air holes drilled and the corners smoothened it was time to give the deep drawing a try, but the block was too high and too large. 

 

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To reduce the height by 14 mm we used a thicknessing machine and attached the block to a board with double-sided tape to insure the block to stay in place. Finally we succeeded to fully deep draw the block. Next up was the removal of the Vivak from the mold, by blowing air through the holes from the back.

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I removed the surfaces that I needed for the model using a saw and utility knife. After attaching all the pieces together it was time to start the painting process. I set up the camera and lighting, prepared the color palette and started painting. The result of which is shown in the movie, giving a first impression of what a building process might look like when architecture becomes as painting.

Bus stop model


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The roof of the bus stop has been 3d printed in gypsum. The mat surface of the material creates beautiful shadows, emphasizing the shape on the photos. The roof is only 2mm thick in the model, it needed small blocks, added at the bottom of the 3d print, to be glued to the base.