Abstract: A method of manufacture of a multilayer ceramic shell mould whereof at least one contact layer out of a wax master pattern or a part to be manufactured, or other similar material, includes a step of preparing a first slip containing ceramic particles and a binder; a step of dipping the master pattern in a first slip; a step of forming the contact layer, and a step of depositing sand particles particles onto the layer and drying the contact layer. The ceramic particles of the slip are mullite particles and the slip includes a texturing agent.

Abstract: A method of manufacture of a multilayer ceramic shell mould out of a master pattern includes the steps of dipping the master pattern in a first slip containing ceramic particles and a binder, depositing sand particles to form a contact layer, dipping the master pattern in a second slip containing ceramic particles and a binder, depositing sand particles to form an intermediate layer, dipping the master pattern in at least a third slip containing ceramic particles to form a reinforcing layer. The ceramic particles of the slips includes mullite, alumina, or a mixture of the two, whereas no layer contains any zircon.

Abstract: The inventions refers to a method of manufacture of a multilayer ceramic shell mould whereof at least one contact layer, one intermediate layer and several reinforcing layers, out of a wax master pattern or other similar material, consists in performing the following successive operations: dipping in a first slip containing ceramic particles and a binder, depositing sand particles onto said layer and drying said contact layer, in order to form said contact layer, dipping in a second slip containing ceramic particles and a binder, depositing sand particles onto said intermediate layer and in drying said layer, in order to form said intermediate layer, dipping in at least a third slip containing ceramic particles and a binder, depositing sand particles onto said layer, drying said layer, in order to form a reinforcing layer, the formation of reinforcing layers being repeated until obtaining a shell mould of set thickness.

Abstract: The invention relates to a method of manufacture of a multilayer ceramic shell mould whereof at least one contact layer out of a wax master pattern or a part to be manufactured, or other similar material, consisting in dipping the master pattern in a first slip containing ceramic particles and a binder, in order to form said contact layer, in depositing the sable particles onto said layer and in drying said contact layer. The method is characterised in that the ceramic particles of the slip are mullite particles.