First day of the project

Today we met Maaike de Vries, our coach for this project. She gave us an introduction on what we are going to do during these four weeks. She told us that we will work together with Paleis het Loo to reconstruct royal monument the Naald in Apeldoorn. It was built in 1901 as a gift for the marriage of queen Wilhelmina and Prince Hendrik. In 2009 the monument was mentioned a lot in the news because an attack on the royal family was attempted there during the national Kings day. The monument is obelisk shaped and has a round gate with eight poles surrounding it. Below you can see some original pictures of the monument from the opening in 1901.

Opening in 1901

Detail of the gate

This is what the monument looks like now.

Monument in 2009

If you look closely you can see that the crowns from the original picture are missing. Around 1950 so many of the crowns were stolen or damaged that Paleis het Loo decided to remove the remaining crowns and include them in their collection. This year Het Loo wanted to give the monument back its crowns by making eight brand new pieces which are reconstructed from the original crowns and they asked us and Maaike to do so! We are all very excited to start working on this project.

The original crowns were made of cast iron. We are going to cast the reconstructed crowns as well by a company in Groningen called gieterij Borcherts. They do investment casting, a process where you have a replica of the object that you want to cast made out of material that will melt. The mold is created by putting sand around the replica and then heating it up so that the replica melts away. Iron is poured into the created cavity. When the object is cooled down the sand will be brushed away.


Explanation of investment casting

Because casting eight crowns will take a lot of time, we will not be able to finish them before the project deadline. However, we can still cast some test pieces to try out which casting method works best. For now we want to try out three moulds:

  1. A wax mould made by pouring wax in a silicon mould. The silicon mould is created with a 3D printed crown made out of PLA

      2. A 3D printed wax mould made out of wax filament which will be printed in the Ultimaker 3

      3. A castable resin mould which is printed on a Form2 machine

To make the moulds we will make a 3D model of the crown and retouch it digitally.

We heard a lot of information today and we are excited to start working on the project. For now we will figure out how to make a 3D model of the original crown so stay tuned for another blog post!


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