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

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

The component that makes this different from other plastic manufacturing processes in that no pressure is called for. It also has few rivals when it pertains to the creation of large hollow items which are resilient and inexpensive.There is a variety of product lines that are produced by this process including large size water tanks, automobile items, intricate shaped medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in regards to type and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in River Falls WI 54022, 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 rotocasting 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

Custom Molded-River Falls-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 River Falls 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 technique has been used since early times for creatingvseverl products. Egyptians for instance, used roto-molding techniques in the making of ceramics. The Swiss were also making use of this rotation technique to generate hollow chocolate eggs. Some plastic product lines in the USA were made utilizing this method some time between 1940 and 1950. Since it was regarded to be a fairly slow process, the procedure has however taken long to catch on

1. Mould preparation.
A predetermined volume of polymer in grain form is loaded into a hollow mold. The mold is usually made from cast aluminium or sheet steel substance. The coloring preferred for the end item is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic manufacturing.

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

2. The heating and fusion step.
Once within the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The turning is done slowly, about 20 rotations per minute. The main thing that is vital at this moment is the period of time the mold will spend inside the oven. If it overstays, the product will lose stability and durability, creating a weak item. If it is removed from the oven too early, the polymer will not have flowed correctly, which generates bubbles in the finalized product.

3. Mould cooling.
When the product has completely spent the correct amount of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which generates a cool mist. When the component cools, it reduces a little for ease of removal from the mould. This is another measure that depends a lot on the right timing, since rapid cooling reduces the material too fast, causing bending of the product.

4. The removing or de-molding phase.
When the component inside te mould has cooled successfully, the person taking care of the process can then remove the finished item from the mold. The process is repeated from the beginning, giving a number of identical items.

For more information on the different rotational molding options offered for the River Falls WI 54022 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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