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Posts in category onbekend

Science Fair

A belated and concluding post. Our exposition at the science fair (26-okt) was a success. We are very satisfied with number of visitors and we are greatful for the interest that people took in our research. If everything goes well these results will also be shown at the congress for Urban Network for Innovation in Ceramics in may 2011. Ultimately our porselain replicas will be sold in an museum store in Delft and possibly in the museum store of the Boijmans Van Beuningen Museum. More about this when this actually happens. ūüôā

 

Finally, we like to thank everyone for reading our blog and also thank those who attended at the science fair. We also like to thank those that helped us with the many obstacles we encountered. We had an awesome time doing this kind of research and are happy to take another important step in the world of Augmented Prototyping. We will keep this blog updated when there are more developments.

 

As a bonus, some photo’s that were taken during the science fair. Enjoy!¬†

 

 

 
 

 
 

 

 

Science Fair! (26-10-10)

The results of this project and other projects will be shown at the Science Fair coming tuesday.
Everyone that is interested, is more than welcome to come and visit us!
 
 
 
 
DATE AND TIME
26-10-2010 
14:00 – 17:00
 
ADDRESS
Science Centre TU Delft
Mijnbouwstraat 120
 
TRAVELLING PLAN
Science Centre (in Dutch)
Google Maps 
 
SPECIAL APPEARANCE
At 16:00 there will be a special presentation
Concerning Forensic Visualisation
By the project manager of the RRD (crime scene investigation)
 
FEE
Youth: 4,00 
Adults: 6,50
Students and TU Delft Employees: Free
Museum Card: Free
 
 

 

Casting the Molds

Last week’s Thursday (21-10-10) we went to Maaike Roozenburg’s Studio in Koog Bloemwijk near Amsterdam. At 9 am we also picked up the synthetic polymer prints. These turned out to be printed very well, but every one of them is too fragile to be used for mold casting. We now have a total of 12 printed glasses.

 

 

 
 
 
 
After discussing which glasses we will make molds of today, Maaike teached us the basis principles of mold casting. Because the molds consist out of three parts, one side of a glass and the top and bottom of the glass are covered with clay. After this the 4 sides of the clay are clamped with wooden formwork. Then the plaster solution is carefully poured into the mold. This has to dry and harden for about 30-45 minutes. Next, the mold is put upside down to cast the other side and finally the bottom.
 
 
 
 
 
 
 
Because this is a very time and labour intensive process we did not manage to finish the molds. Also, they have to dry for a couple of days before they can be used. Maaike will finish the molds that we did not complete. All in all, we learned a lot today about mold casting. It is not as easy as it seems!
 
 
 

Reinforcing the Powder Prints

Today we reinforced the four powder prints with candle wax. Not without problems. One of the glasses collapsed under its own weight when it absorbed the wax. Luckily, we still have the polymer prints. The molds will be cast next thursday.

 

 
 
 
 
 

 

 

First postive molds are ready

 Today we collected a lot of molds. First of all we dug out the 4 high resolution prints at Architecture. These print were made with the plaster printer. These molds will be impregnated with candle grease tomorrow. This way they will be strong enough. When the printer started the job last Thursday, one of the print components was damaged. With a small repair we managed to fix it and thankfully it completed the job!

 

Also the high resolution cups were printed at the faculty of Industrial Design because the plastic had finally arrived. The result is really satisfying. The plastic is pretty strong, although one cup has a very little hole near a crack form the old glass. However when a negative mold out of plaster is made, the won’t be a problem.

Quick Update

A quick update to let you all know we are now waiting for our 3D models to be printed. This did not come easy. After we scanned and processed the glasses from the Boijmans van Beuningen museum, a lot of problems occured with preparing the files for printing. With plenty of hard work and the knowledge Dr. Y. Song provided us with, we tackled most of these problems. This resulted in 2 out of 4 models from the collection that can be printed. The problem with the remaining two glasses is that they had too many holes in them. Holes are very labour intensive to repair when using meshes. We decided to use two of the three glasses we scanned from the Delft Historical Archive, so we have four printable glasses in total.

 

As an experiment we are also printing these four glasses in low resolution. The surface of the exterior of the glasses will give the impression that it is made from layers, like in the scan. This could result into a interesting aesthetic factor. As a second experiment we are using 3 types of 3D printers to observe their accuracy, material properties, cost and other factors. The four high resolution glasses will be printed with both the flour printer and the polymer printer. The four low resoltion versions will be printed with a synthetic polymer printer. If everything goes well we will have 12 printed full scale glasses by monday.

 

Below are the renders of the glasses that will be printed in both high and low resolution. Glass 2 and 4 are from the Boijmans Van Beuningen collection. Glass 494 and 553 are from the Historical Archive.

 

Glas 2 – high

 

Glas 2 – low

 

Glas 4 – high

 
 

Glas 4 – low

 

Glas 494 – high

 

Glas 494 – low

 

 Glas 553 Рhigh

 

Glas 553 – low

First mold for porcelain has been made

Maaike Roozenburg did a great job in making a negative plaster mold around the cup which we printed in a plaster printer. This cup has been reinforced with candle grease and this works pretty good as you see. However, the cup has very complicated bulbs which meant Maaike had to spend a whole day in order to create this mold. With this particular mold, many porcelain cups can be made.

Museum Boijmans Van Beuningen glasswork has been scanned

Today we scanned the 17th century glass cups from Museum Boijmans Van Beuningen . One of the pieces has more holes then there is glass, so this cup will be hard to repair with the computer. However the material looks like new! The other pieces are very nice and also special. We also took some pictures from each glass with our own camera.

The plan is now to convert the files into STL files. However it seems like we will have to do this on our own, and this is a TOUGH job. We will try our best to make this project succesful but it will be very very hard this way…. We will try to print 4-5 glasses with the plastic 3D-printer before next thursday, but the plastic still hasn’t arrived…

 

Reinforcing a printed cup

Yesterday the printed cup was ready to be reinforced. This cup is now impregnated with candle-grease. This material gets into the plaster and fills up the brittle material. This way the cup will also be water resistant and the quality of the surface will be maintained.

In the pictures below you can see the candle greas melts in the pan. Also a few test parts made with the same 3D-printer are impregnated, the result was good so the cup was impregnated afterwards. The alternative was epoxy but this material is hard to order and very dangerous for your skin.

Maaike Roozenburg will test this cup coming thursday, the idea is to make a negative mold out of this cup. With this negative mold, a porcelain cup will be made.

Also, a few extra glasses will be printed before thursday, but only if everything will work out. There are some problems with the DICOM-scan files in which the glue between the different parts of glass is converted into a hole. When ir. Y. Song worked on these files it became clear a lot of the cracks were gone in order to fill up the holes.

Also some other news, the plastic material for the 3D plastic printer should arrive soon. When it arrives we can change the positive mold from 3D-Plaster to 3D-plastic which is stronger and more water resistant.

Coming thursday will be very important. We will scan the Museum Boijmans Van Beuningen glass-work and maybe a few other interesting things will happen…. We will keep you informed.

Testing begins

 

The last few days were quite hectic. Tuesday we printed four small molds with the 3d-plaster printer. These molds were finished with different materials so we could see how it would behave in the molding process with porcelain.
The first mold was impregnated with clear coat from a car-spray can (only the outside). The second one was impregnated completely with it, the third one was impregnated completely with clear nail paint and the fourth mold was original, we did nothing with it. Also, we had an extra piece of plaster (140 powder, impregnated with bathing salt), which we could use to test.

After the meeting on thursday, Maaike went to her studio and tested these molds. The results were quite disappointing. The result was that only the original mold and the 140 powder mold were absorbing water which is essential in the process. The others were to heavily impregnated and couldn’t absorb anything. Also the powder gets weak when it gets in touch with water.

Before last thursday, we also wanted to print a positive mold (identical to a glass) out of plastic on the liquid-plastic printer. This could then be used to make a plaster mold for making a lot of porcelain cups. But, bad news; The machine runned out of plastic-liquid and there is no reserve material. We were quite disappointed about this situation because we can not test this method now and we hope they get the material before we need to print the Museum Boijmans Van Beuningen glass in the week of 11 October. These positive molds will be used to create the plaster molds in which the 100+ serie of porcelain cups will be made.

After this, we decided to print the positive glass mold in the plaster printer. This is now printed and is drying over the weekend. After the weekend we will impregnate this cup with something like epoxy so it gets so strong, plaster can be poured all over it to make a negative mold out of it. We hope this method will work out. We will also try to find out how we can make a good negative mold out of the 3d-print plaster…

 

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