This tactile element consists of two parts. In the first part you find out how a bell is cast. In the second part you can feel the result. A little later there is a video showing the production process. The video has no sound but we include the description of the video in the explanation for this tactile station.
This tactile panel takes the form of a landscape-oriented rectangle. The title is 'How is a bell made?'.
In the first part of the tactile element we explain the casting process. This part corresponds to the left side of the tactile panel. If you work your way from the top down you first feel a vertical dotted line. After a while, on both sides of the dotted line, you can feel two upright elements, which vary slightly. This is the opening at the top of the mould into which the metal is poured.
Allow your fingers to find their way through the opening and the irregular shapes that follow left and right. It doesn't take long until you end up at the edge. You can now continue to follow the opening left or right. It doesn't matter which side you choose because the bell is completely symmetrical. You will feel a short horizontal section that soon turns into a flowing line downwards. At the end the line thickens. Can you feel that the surface you are following is accentuated with small dots? This will be the final bell and is coloured yellow on the tactile panel.
The material on the outside is white and feels smooth. This is the casting mould. The material on the inside is a dark colour and is also smooth. This is the core. If you move your fingers from the core to the inside of the bell you will feel a brick structure. The brick structure forms the beginning of the production process, as shown in the video.
The video starts with the carillon drum slowly rotating, followed by details on a bronze bell.
In a modern workshop, a man very carefully stacks bricks to 'construct' the skeleton of a bell. Where necessary, the bell founder cuts pieces off the stones to make them fit. The stones lie on a structure that slowly rotates. He then applies a white powder to the rotating baseplate. Slowly he builds up the inside of the bell until he reaches the top of the brick structure. The profile of the future bell rotates along with the baseplate and pushes away the excess material. Over time, the inside of the 'bell' is created on the baseplate.
In the next stage the man pours wax over the bell and the layer of wax is built up as thick as the final bell will be. The man painstakingly applies the text in dark letters as well as a decorative edge.
Finally, he adds the top element of the bell, with which the bell will later be attached to the beams of the bell tower. This is also where the metal is poured in. This element corresponds to the irregular shapes you just felt at the top of the bell and rather resembles a crown. Now that the wax bell is ready, the man uses a brush to smear a thick grey liquid over the bell.
An iron structure, consisting of metal rings, which are wide at the bottom and narrower as they approach the top, is then pushed over the now metal-coloured bell. The structure is placed over the bell from above and then filled with a sandy material. When the metal structure is removed, the wax inside is melted and the print of the bell is preserved in the metal structure. The inner bell is now completely cleaned and the mould is reinserted over it.
A man throws metal rods into a burning oven, after which the liquid metal flows out of the oven. It has a bright yellow glow. Several men in protective clothing pour the metal from a large tank into the top of the mould.
Later, the metal structure is removed in several pieces, revealing the new bell. With a hoist, the bell is raised and put upside down in a machine. Metal is scraped off the inside to achieve the right sound.
The video ends with bells hanging in a tower. A carillonist plays the bells by banging his fists on keys, which are actually protruding wooden sticks. This concludes the video.
On the right side of the tactile panel you can explore the finished bell. This is a real bronze bell fixed to the panel. At the top you can feel the crown, which consists of two metal elements perpendicular to each other. Note the small openings in the crown. They correspond to the irregular shapes you felt in the first part of the panel. On the bell you can feel ridges and letters that were applied to it. The letters form the name of the bell founder. It says 'Dumery me fecit' or 'I was made by Dumery'.
The next element you can explore corresponds to number 40 in the audio guide and is found in room 13. To reach this room take the stairs diagonally behind you. First there is one step leading down and then you head up the spiral staircase and enter the nearest room. Be careful of the small step down. In these rooms you will find numbers 33 to 38. The tactile panel is located in the next room on the right, room 13, once again with two steps up. The tactile element is located between the first and second window on your right.
If you want to stay here in room 9 for a while and carry on listening, go to number 31.