Mould Making


Mould making is an intricate art and science that has resulted in a fair few terms – some of which are self-explanatory. So, on this page, we will give you a selection of definitions that pertain to this field of ours.

is formed by pouring or otherwise spreading a compliant moulding mixture directly over a maquette surface. A resin or plaster can support the ‘skin’ if necessary.

is a period needed after application and catalyzation to a master pattern to reach the full potential of elasticity and strength. This term is usually applied with RTV rubbers.

is a semi or fully rigid mould often formed in a rubber compound, like in the casting of jewellery, or metal, like high-precision wax casting.

is a ‘U’ shaped clamp of metal, fixed at the edges of abutting cases of mould to maintain sections in their place.

is any material introduced to create a hard copy in a reproduction mould, e.g., wax in lost-wax processes. However, there are other alternatives, like resin, plaster, concrete, cement fondue, etc.

is a substance, often a metallic compound, added into RTV base rubbers to start curing and setting.

is a feature used in moulds to locate and maintain mould elements, like rubber cases or skins, in their assigned region.

is the activity of some moulding material that keys into an exterior on a master pattern, preventing the mould from being toppled, uprooted, or otherwise disengaged.

is a jacket for covering and supporting a mould and maintaining the rigidity of contents.

is an optimum contour of a mould, taken over a 3D pattern to distribute said pattern into different main segments for moulding.

is an inseparable and interlocking section of the mould, which generally refers to a sand mould or a rigid plaster.

AKA a pour mould, is a method in which the compound is poured over a maquette, secured in clay or in a shuttered wall.

is a mirror-image impression of a maquette, which has been created in flexible plastic/rubber compounds or in rigid materials like a plaster of Paris.

is a variety of mould where the mould case is assembled over the maquette before the fluid compound is poured in.

is an abbreviation for Room Temperature Vulcanisation. A collection of rubber elastomers that are used in reproduction moulds. These materials can vulcanise with ambient conditions.

is a substance, mostly in powder form, added to RTV mould compounds to enhance their viscosity.

is a feature on a maquette or master pattern surface that allows keying into and therefore acts as a lock-in supporting mould class.

is a process of ‘fixing’ compounds made of rubber when under heat and also pressure. A ‘screw vulcaniser’ is the device used to apply the appropriate levels of the two conditions of the process to rubber moulds.