Pentas Moulding, the one stop shop rotational moulder.

Pentas is 24 hours a day, 5 days in a week engaged in the process creating plastic products through rotational molding for which we have currently nine rotational molding machines available.


Rotational moulding in short


Rotational moulding is the pressure-free heating of plastic powder in a mould into a shaped plastic product. In the production process a mould of aluminium or a sheet-form part is filled with thermoplastic powder (usually PE or PP), and then closed. The mould is heated in a large oven. By rotating, in two mutually perpendicular axes, the molten material is pressed against the mould wall and takes its shape. The product is then cooled and taken out of the mould. Through the process of pressure-free thermoplastic an impact resistant product is created, that is available in almost any shape. Production series range from 100 to 5,000 products per mould per year and have a weight between 0.5 KG to 300 KG


Rotational moulding compared with other manufacturing techniques

Within the plastics manufacturing industry, there are plenty of manufacturing processes for the production of plastic products. The most important techniques in this market are additionally to rotational moulding; blow moulding, vacuum moulding and injection moulding.


Rotational moulding vs. blow moulding


Blow moulding or blow moulding is another very popular method of production. Molten plastic is extruded into a preform. Pressurized gas – usually air – then presses the molten plastic into the mould until it cools and hardens. After cooling, it can be removed from the mould.

Rotational moulding Blow moulding
+ Pression-free product + Short cycle times
+ low investment costs + More materials types possible
+ Freedom of design + High level of detail


Rotational molding vs. vacuum forming

Vacuum Molding

In the vacuum forming, plastic foil is heated to the deformation temperature, for example, via an infra-red oven. The heated foil is stretched in or around a mould. A vacuum is created between the surface of the mould and plastic so that the plastic in the form of the mould is sucked out, the product is then force cooled.


Rotational molding Vacuum forming
+ Pression-free product + Short cycle times
+ Low investment costs + More materials types possible
+ Freedom of design + High level of detail



Rotational moulding vs. Injection moulding

spuitgietenWith injection moulding, molten plastic is injected under high pressure into a mould. By cooling the plastic solidifies, which obtains the plastic product. With injection moulding it is possible to produce complex parts. Because of the high cost of the injection moulding it is especially suitable for larger production quantities.


Rotational moulding Injection moulding
+ Low investment costs + Short cycle times
+ Thick walls possible + More types of materials possible _________________________
+ Easy to produce hollow products


Opportunities at Pentas summarized

  • Design department who are able to turn your idea into products.
  • Mould construction for making moulds, in addition we have a tool shop for preventive maintenance of moulds and tools.
  • Rotational moulding of products in which Pentas also has its own raw material mix and foam department department;
  • Assembly lines for assembly of parts for products
  • In field of logistics, Pentas can offer solutions, hereby can be thought of Just-In-Time (JIT) and / or KanBan


The well thought automation using robotic operations for advanced and product-specific automation allows Pentas to manufacture high quality products at competitive production costs in large and small quantities.


Want to learn more about the production of our plastic products?

Please contact us for more information or for an customized offer.