Global stainless steel sundials
The global sundials combine precision, functional variety and clear presentation and can be installed at any location in the world. The sundials are constructed entirely from stainless steel and are suitable for permanent use in the garden or on the balcony. The global sundials can be installed directly on a wall or railing. The base is adjusted horizontally using the built-in spirit level. Rawl plugs for all ground surfaces and a richly illustrated, detailed manual are included. The globe has a diameter of 160 mm, the all-round dimensions are: width 210mm x height 260mm x depth160mm. Packaged weight: 4.8 kg.
We offer suitable stands, one metre in height, manufactured from stainless steel or granite with integrated securing system for any terrain - in the garden or on the balcony - as accessories for all our global sundials.
Stainless steel lost-wax casting - the casting method for the best attention to detail
The sundial globe is manufactured from stainless steel in a lost-wax casting process. This casting method is also called wax-melting process, the wax model and the ceramic mould are unavoidably lost after each casting and therefore have to be manufactured anew for each globe.
This precise casting process demands careful handicraft and extensive experience. But it is well worth the effort, even the smallest geographic details can be portrayed.
The lost-wax casting takes place in several steps: Using a high-strength aluminium casting mould, the wax models are created. The mould for the earth's northern and southern hemispheres are each divided into seven parts, so that the wax models can be moulded after the casting.
From the other half of the mould, the finished globe wax model is carefully pressed out using compressed air.
In the next step, the models are joined together in so-called model clusters using the casting system. This model cluster is then covered via immersion in a ceramic mass to create a moulding dish from fine fire-proof flour.
The moistened cluster is then sprinkled with sand. The immersion and sanding are repeated as often as required until the moulding dish has attained the necessary stability for casting. The melting-down of the wax models takes place at approximately 150 °C, while the firing of the moulds can be carried out at approximately 750 to 1200 °C. The fired moulds can now be immediately be cast with stainless steel. After the casting and the complete solidification of the cast, the castings are removed from the moulds and the earth globes are separated from the casting system. After this, the casts are re-worked with any sanding, blasting and heat treatment and levelling, plus the examination of the casting.
This final finishing work gives the global sundials their exclusive appearance. The ocean's surface is brushed to a matt surface with sisal and a special paste. The earth's surface is sanded and satinised.
As a final step, the globes are placed on a turning lathe and provided with a precise groove at the equator, into which the time ring for the global sundial is passed.