Imprint Contact 868 Videos
900.000 Callings


Wheel change
Save Energy

Video Work Materials

Video Chemistry 1
Video Chemistry 2
Video Chemistry 3
Video Chemistry 4
Video Chemistry 5
Video Chemistry 6
Video Chemistry 7
Video Chemistry 8

Video Physics 1
Video Physics 2
Video Physics 3
Video Physics 4

Video Production car parts
Video 3D printer
Video 3D printer 2
Video Fuel
Video Petrol Trap
Video Knock Resistance
Video Air
Video Water

Video Steel Production
Video Steel 1
Video Steel 2
Video Steel 3

Video Copper Production
Video Titanium
Video Aluminum
Video Aluminum Body
Video Magnesium Alloys
Video Corrosion
Video Sandblasting
Video Plastics
Video Carbon Fiber
Video Glass Fibre Plastic
Video Glass Fibre
Video Fleece production
Video Graphene
Video Adhesive bonding
Video Adhesive bonding 2
Video Welded Joint
Video Metal Casting 1
Video Metal Casting 2
Video Metal Casting 3
Video Forging 1
Video Forging 2
Video Cold Stamped
Video Var. Metal Plate Depth
Video Clutch Housing

Video Glass 1
Video Glass 2
Video Glass 3
Video Glass 4
Video Glass 5
Video Glass 6

Video Grey Iron
Video Hardening
Video Rubber Suspension
Video Old Cars
Video Workshop
Video Waste Oil
Video Scrap Reusability
Video Environmental Protection
Video Waste

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Lost-wax Casting

Highly flexible and also suitable for development

The investment casting combines flexibility in the production of components with precision and economic efficiency. In spite of the larger number of manufacturing steps it is suitable not only for small series because the steps can be largely automated. Indeed, it can be applied during the development of a component, e.g., to try out different materials. 'investment casting' means, in this case, that preparations can be, to some extent, avoided. For example, with cast screw-threading. Of course the development of undercut surfaces and cores pose no problem.

Construction no different from other casting processes

It starts, as usual, with the construction of a part in the CAD system of a computer. Then a suitable CNC lathe or milling machine produces a form in which a wax model is cast. This model corresponds precisely to the part which is later made of metal, also in relation to the surface finish. If the model adheres to the specifications, several are produced and assembled to form a 'tree' (figure 1).

The wax keeps the space free for the metal to be poured in.

After several passes through a ceramic liquid immersion bath, and after sanding down, the outcome can be seen in the above figure 2. 160C hot steam causes the wax run off for re-usage. Hence, the alternative name, 'lost wax technique'. Afterwards the empty shell must be made durable by heating it to approx. 1000C to enable the casting of hot metal. You can see in the cross section of the connections to the single castings, that the transport of the liquid metal to the respective form must be carried out as quickly as possible.

Further treatment not necessary

After having slowly cooled down, the component is separated from the tree and suitably polished, it is now, in effect, finished. Of course further treatment is possible. In addition, a thermal treatment can be applied to improve the material characteristics. There are quality control checks on every component as well as random spot-checking. This also depends on the specifications of the construction. There are several possible methods used to check for fissures, hardness and surface accuracy. Today even the melt can be checked using a spectral analysis. 08/08

Lost-wax casting               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

Our E-Book advertising