zielsicher Englisch, Metalltechnik, Schulbuch

Read the text about casting and fill in the missing words from the box. methods mould foundry individual serial liquid alloys expensive In order to produce a casting,  liquid metal is poured into a  mould . Most metals and their  alloys can easily be cast. Castings are produced in a  foundry  . Casting is used when the production of a work piece becomes too  expensive using other  methods  . There are three different casting techniques: sandcasting, gravity die casting and pressure die casting. Sandcasting is used in  individual manufacturing, gravity die casting and pressure casting are used for  serial production. Label the three pictures and the three casting methods. Use the Word bank. moulds for sandcasting casting process a casting Two halves of a mould are put together. They make the mould cavity. After the metal hardens, the mould is destroyed; it is only for a single use. The liquid metal is cast in permanent moulds that can be reused. A pressure die casting machine is necessary, here. It is a very expensive method because of the machine and the permanent moulds costs. sandcasting gravity die casting pressure die casting Why do you think sandcasting is used for individual manufacturing, but gravity die casting and pressure casting are used for serial production? Sandcasting is used for individual manufacturing because the mould is destroyed after the metal hardens. Gravity die casting and pressure casting are used for serial production because the metal is cast in permanent moulds that can be reused. What kind of machine is this? Look at your mind map from task 02. What is going to be the next topic? It’s a bending machine. The next topic is going to be metal forming – “bending”. 03 A2 Word bank 03 casting Gussstück mould Form cast (irregular: – cast – cast) gießen foundry Gießerei sandcasting Sandgießen gravity die casting Kokillengießen pressure die casting Druckgießen casting process Gussvorgang 04 cavity Hohlraum 04 A2 05 B1 06 B1 79 Non-cutting operations in detail 15 Nur zu Prüfzwecken – Eigentum des Verlags öbv