Looking for rotational molding alternatives in Wisconsin? Want affordable custom plastic molding that is cost effective for Cumberland area? Then give us a call at our toll free number 866-971-7861 or request a quote today!

rotocasting-Cumberland-Rotational moulding pertains to a plastic manufacturing procedure that makes hollow stress-free items. The technique relies on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have different shapes, sizes and colors. This technique is also referred to as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The feature that makes this different from other plastic manufacturing processes that no pressure is needed. It also has few competitors when it comes to the manufacture of large hollow items which are resilient and inexpensive.There is a wide variety of products that are developed by this process including large size water tanks, automobile items, sophisticated designed medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in terms of design and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Cumberland WI 54829, it is a cheaper way of making plastics. This is because apart from the fact that no pressure is required, the cost of mold preparation is low.
  • A wide array of design options.
    There is no limit to the kind of design one may want to create. The rotomolding process therefore allows for the manufacturing of products that have complex shapes for different purposes.
  • Size.
    The process provides room for the manufacturing of products of any size, large or small. As mentioned earlier, it has few competitors when it comes to the making of large tanks at low costs.
  • Low risk.
    Due to the low costs of creating a mould, the process allows for test runs before one can decide whether to do mass production. It therefore minimizes the risk of losing a lot of investment.
  • Durable products.
    The process allows for even coating of the mould with the heated polymer, giving the product a wall with uniform thickness. It also gives the option of double coating for increased durability. Sometimes metal inserts are placed inside the mould to further strengthen the product.
  • Environmentally friendly.
    There is no waste that could have a negative impact on the environment because the products that cannot be used are reground and reused as polymer.

Examples of Products Made by Rotational Molding

Plastic Products-Cumberland-Rotocasting is a very versatile process, making it possible to create a variety of products for different industries.

  • Agricultural industry– From cattle feeders, water troughs, spray tanks etc.
  • Automotive industry– Filler tubes, dash boards, arm rests, sun visors, air conditioner duct work etc.
  • Furniture– We have plastic cabinets, chairs and tables made from this form of moulding.

There are numerous Wisconsin plastic products also that have been made for the marine industry, lighting, waste storage and transportation, kayaks etc.

Few Disadvantages – There are nominal disadvantages that have been associated with rotocasting. For instance:

  • – The process is relatively slow when compared to injection moulding.
  • – There is a limitation when it comes to the type of raw material you can use. Only poly based and nylon polymers can be used.
  • – The process comes with an increased cost because the polymer has to be ground to powder form before use.
    These limitations are often overlooked considering that the process is still relatively cheap and offers more in terms of variety when it comes to the finished range of products.

Remember – There are new developments and discoveries that are being made as the world of plastic manufacturing in Cumberland Wisconsin continuously. For instance, tests are being done to see whether there are other materials that can be used for this process. But so far, rotomoulding offers a good option for the production of a wide range of inexpensive plastic products.

The Rotomolding Process in Detail

This moulding system has been used since earlier times for creatingvseverl products. Egyptians as an example, utilized rotocasting systems in the manufacturing of ceramics. The Swiss were also applying this rotation design to generate hollow chocolate eggs. Some plastic items in the USA were made using this approach some time between 1940 and 1950. The procedure has however taken long to catch on because it was considered as being a relatively slow process

1. Mold preparation.
A fixed amount of polymer in grain form is packed into a hollow mould. The mould is usually composeded of cast aluminium or sheet steel component. The colour needed for the finished goods is pre compounded into the polymer. The most generally used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this format of plastic assembly.

Preheating of the oven starts, and it can be done by either conduction, convection or sometimes radiation. It is warmed to temperatures between 500-700F. The mould with the powdered polymer is then secured and installed within the oven.

2. The heating up and fusion process.
Once inside the oven, the mould is rotated on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The turning is done slowly and gradually, about 20 rotations per sixty seconds. Something that is important at this moment is the period of time the mold will spend inside the oven. If it stays to long, the material will lose stability and durability, creating a weak item. If it is removed from the oven too early, the polymer will not have liquefied correctly, which develops bubbles in the finalized product.

3. Mold cooling down.
When the product has sufficiently spent the correct amount of time in the oven, it is then taken out for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the component cools, it shrinks slightly for ease of removal from the mould. This is another measure that depends a lot on the right timing, since rapid cooling decreases the material too rapidly, causing warping of the material.

4. The offloading or de-moulding step.
Once the material inside te mould has cooled adequately, the molder handling the process can then extract the completed item from the mold. The technique is repeated from the beginning, giving a number of identical products.

For more information on the different rotational molding options offered for the Cumberland WI 54829 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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