There is rotational molding, compression molding, and blow molding, as well as spray-up molding.

Types of Molding Methods

When you think about molding, there are various types. There is rotational molding, compression molding, and blow molding, as well as spray-up molding.


Compression molding is a manufacturing process that uses non-expendable steel molds. These molds are manually shaped or CNC machined. The molds are usually simple in design and have a high degree of precision. Compression molding can be an economical option for manufacturers who need to create many similar parts in a short time. This process also offers low tooling costs and does not require a high amount of capital equipment. Find out more detail about stansing av metall.


Each of these methods has its advantages and disadvantages. You should learn more about each one before deciding on which one is best for your product. Then, you can start molding!

High Stiffness

This results in a component with high stiffness and low fiber degradation. In cases where stiffness and strength are of paramount concern, the process typically uses carbon fiber reinforced polymer.


Pressure and Heat

Using pressure and heat, the process increases the integrity of the material. The process of compression molding begins with the creation of a pre-form that mimics the desired shape.


These pre-forms must be larger than the mold cavity. Once the pre-forms are prepared, they are placed into a heated mold cavity. This mold is then closed using a hydraulic press.

Compression molding

Compression molding is a highly efficient method of producing composite parts. It makes use of fiber orientation, a polymer matrix, fillers, and additives. This forces the plasticized charge to fill the mold cavity uniformly. The heat from the mold also cures the material into its final shape. For more detail about formstøping av plast plaststøping.


The process involves a high level of precision and accuracy. It can be used to produce a variety of parts with a variety of properties.

Plastic Products.

Compression molding is a common process used for manufacturing plastic products. Once cooled, the material becomes soft and forms a hollow part.


The mold is then filled with a shot weight or charge of material. As the mold is slowly rotated, the material disperses and adheres to the mold walls.

Rotational molding

Rotational molding is a manufacturing process that involves the use of a heated mold to create a hollow part. This process is effective for producing both large and small parts. It can also produce parts with multiple cavities. Common applications for rotational molding include containers and automotive parts. It can produce anything from a small toy part to a large tank that holds thousands of gallons. And because it can be used to create parts with many different characteristics, it can also be used to produce components with very tight tolerances.

Another advantage of rotational molding is that it can create parts that are hollow or not. It is also an environmentally-friendly way to produce parts, as it does not require any post-production finishing.
The process of rotational molding begins with the loading of a fine powdered polymer into a mold coated with a mold release agent. The mold is then closed, to prevent any powder from escaping.

slowly Rotating

The mold is then heated while slowly rotating in a bi-axial direction. The material molten in the mold then cools by convection to room temperature. It is then removed safely from the mold. The critical parameters of rotational molding include the cooling rate, heating time, and rotation ratio. The latter two parameters determine the mechanical properties of the molded part.


This can be particularly helpful if the parts need to be water or air-tight. A rotomolding machine can also accommodate double-walled containers.