5 Different Ways Of Molding 

 August 22, 2022

First Things First

The medical industry is one of the many industries that require specific products to be molded. Products like syringes, small device parts, stethoscopes, and other tools must be standardized. Molds are produced to shape the product components identically. There is no single way of making parts and products. One standard comparison between the methods of molding is extrusion vs injection molding.


The common idea is that molding is universal. However, in practice, different grades of plastic are used. If metal is to be used as the material for the final component, it is generally termed as casting. Some manufacturers consider casting as a type of molding.

Types Of Molding

  1. Compression Molding

Rubber and plastic pieces are produced using the compression molding technique. In the procedure, a prefabricated rubber piece is inserted into a heated mold. It is then sealed and kept under pressure until the rubber vulcanizes and assumes the shape of the cavity. Similar compression molding techniques are used in vacuum assisted compression molding. It is done under a vacuum to eliminate gasses and guarantee the optimum mold filling and form adherence.


In comparison to other molding techniques, compression molding has a number of advantages. The advantages include inexpensive tooling costs and quick lead times. Slower cycle times are the result of the process of human manipulation of the mold and the results. However, the requirement for manual labor can be a negative aspect for capital intensive manufacturers. Compression molding is often used in a pvc medical gloves factory.

  1. Blow Molding

Since the blow molding method can swiftly produce consistent, thin-walled containers, it is appropriate for little things like bottles. It also works well for more giant storage boxes and drums. Blow molding is enormously beneficial for inexpensively making one-piece and hollow products on a large scale.

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When heated, plastic becomes molten. It is then pumped into a chilled mold. The mold contains a tube that, when inflated, takes on a particular shape. As a result, the air is forced into the tube while the material is still molten, causing the plastic to form around the tube. After cooling, it is taken out of the mold.

  1. Injection Molding

Melted plastic must be injected into closed molds using injection molding equipment at high pressures and speeds. When the molten plastic is injected, it fills the mold’s remaining spaces and the cavities that make up the pieces. The components are expelled by pins once they have cooled. Molten polymer materials are injected. Despite the higher initial cost of making these molds, the process may achieve a high production rate of final components.


Injection Molding offers an immense amount of authority to the producer over the component’s size, shape, and style. It is a more commonly practiced way of molding. Even the chassis of streaming cameras for church are molded using this extraordinary technique. The cost compelling nature of the process is what separates it from other ways of forging products. Injection molding has therefore become one of the most installed means of production on assembly lines.

  1. Melt Molding

Melt molding refers to compression molding when it is used with thermoplastic materials. The plastics are heated beyond their melting temperature for this production method so that they may take on a liquid state. After that, the created polymer is left to cool and harden in the mold’s shape. Melt molding is able to produce superior mechanical qualities than compression molding at the right temperature conditions.

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It can sometimes be confused with compression molding because it involves the same molten plastics as in other methods. The fact that differentiates it is that the temperature of the plastic is very high. The plastic is therefore reduced to a beautiful texture at the trim levels of measurement. It yields brilliantly forged items even in the case of a large scale of production.

  1. Rotational Molding

Tanks and other big, hollow, single-piece containers are best made using rotational molding. Although economical, the procedure does not go quickly. However, rotational molding is a cost effective and sustainable manufacturing technique. The reason behind its cost effectiveness is that it produces minimal waste and frequently reuses the extra material.


Rotational molding is one of the best techniques precisely because of its precision. Just like a potter wheel ensures that all pottery turns out even, rotational molding allows a constant exposure to adjustments. Moreover, the stability of the finished component is impressive.

Final Words

The idea of molding has been the go to process in the manufacturing industry. Disposable items and replaceable parts have to be produced on a regular basis. All the ways of molding are used to achieve a common goal of creating components. Any equipment has to be maintained constantly. With the most efficient and cost effective method, the manufacturing process can strike the correct balance.

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