REPORT 5 3 8


On top of the layer with white sand, more sieved casting sand is added to fill the upper part of the box.


6


The counter mould is made with the plaster model of the finished shape as a template.


4


After the aluminium is completely melted at a temperature of 670°C, it is poured with a ladle into the pouring hole of the moulding box. The created aluminium blocks stay in the boxes overnight to cool down naturally.


9


In between adding layers of sand, every now and then the sand is drilled together to make it sit as tight as possible.


7


The finished plaster model is placed in a moulding box that has a separate upper and lower part. Two pipes are added in the box, one to create the pouring hole and one to create an air hole. The lower part of the moulding box is filled with sieved casting sand. When the lower part is completely full, a fine layer of white sand is added. This layer will help to separate the lower part from the upper part of the box later.


The next day, the aluminium blocks are removed from the boxes and cleaned from the sand.


10


When the box is totally filled with casting sand, the pipes are removed. The upper part of the moulding box is lifted so the plaster model can be carefully removed, leaving a space in the sand in the shape of the block. The upper part is placed back on top again and the pouring and air holes are covered with a disc until the casting process begins.


The sleeves of aluminium that are created because of the pouring and air holes are cut off with a saw.


may 2023 | 49


>>


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84