Moulding is a manufacturing process that involves shaping a liquid or malleable raw material using a fixed frame. It is also known as a mould or matrix. The mould is usually a hollow chamber made of metal into which liquid plastic, metal, ceramic or glass material is poured. It is derived as stencils of different shapes and patterns. Plastic production is based on different types of moulding in various ways. Plastic is a synthetic material that is soft or semi-liquid when hot. It is placed in soft plastic moulds and then the plastic cools or hardens. It provides the desired shape after hardening. Thermoplastics can be melted and reformed if necessary. However, thermoset plastics cannot be reheated, melted or shaped.
Among modern Molding processes, plastic injection moulding, liquid silicone rubber moulding, top moulding are at the forefront. Customized prototypes and end-use parts are produced by the plastic injection moulding process. The standard process eliminates the use of heating or cooling lines embedded in moulds. Thus, moulders, also known as moulding technicians, can carefully monitor filling pressure, aesthetics and overall part quality.
Injection moulding, as the name suggests, is done by injecting material into a mould to produce a part. The most common materials used for injection moulding are metals, thermoplastic polymers and thermosetting polymers. Although injection moulding is a versatile process, it depends on the design and material of a mould. It is also very important to pay attention to the desired shape and properties of the part and the features of the moulding machine. Moulds are usually made of steel or aluminium. It is precisely processed to create specific features.
Liquid Silicone Rubber Molding
Liquid silicone rubber is a highly flexible material that is considered a thermosetting polymer. Its moulded state is permanent and cannot be remelted. It provides the opportunity to use on different surfaces.
It is a form of Molding that allows a single part to contain multiple materials. After the total run of a substrate, the part has been moulded, the upper mould sets are set on the press. It is then manually placed in the mould and over moulded with thermoplastic or liquid silicone rubber material.
Insert moulding is similar to top moulding, but most commonly uses a preformed piece of the metal substrate that is over-moulded with plastic to form the final piece.
Other Molding Methods
When it comes to moulding, there are many different Molding methods, unlike those known. Although these methods are not used often, they are called as follows;
Buffing, extrusion blow moulding, injection stretch moulding
It is dip moulding.
Where Is Molding Used?
Each pattern is designed for a specific purpose. It can be done to frame a door or a window in between uses, but also just to add character to a bare wall in your home. Also;
The spaces between the chassis, walls and doors,
Skirtings where the floor meets the floor,
Crowning for mouldings,
Chair rail to protect walls from damage,
It is used as a mould instead of nailing the artwork directly to the wall.