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

rotomoulding-Friendship-Rotational molding refers to a plastic manufacturing practice that creates hollow stress-free products. The procedure relies on high temperatures and bi axial rotation to come up with seamless, one piece objects that have many different shapes, colors and sizes. This method is also referred to as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures in that no pressure is needed. It also has few competitors when it comes down to the manufacture of large hollow items which are long-lasting and inexpensive.There is a variety of product lines that are produced by this process including large size water tanks, automobile products, intricate shaped medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in terms of 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 Friendship WI 53934, 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 roto-molding 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 Manufacturing-Friendship-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 Friendship 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 Procedure in Detail

This moulding system has been used since early times for creatingvseverl product lines. Egyptians for example, employed roto-molding procedures in the creating of ceramics. The Swiss were also employing this rotation design to make hollow chocolate eggs. Some plastic product lines in the USA were made using this approach some time between 1940 and 1950. The technique has however taken very long to catch on because it was looked at as being a pretty slow process

1. Mould fitting.
A fixed amount of polymer in grain form is loaded into a hollow mould. The mould is usually made of cast aluminium or sheet steel material. The color desired for the finished 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 engineering.

Pre-heating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is warmed to temperatures between 500-700F. The mold with the powdered polymer is then sealed and inserted into the oven.

2. The heating up and fusion process.
Once inside the oven, the mold is turned on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The rotation is done slowly and gradually, about 20 rotations per minute. One thing that is important at this point is the period of time the mould will spend inside the oven. If it stays to long, the component will lose value and strength, creating a weak item. If it is taken out from the oven prematurely, the polymer will not have melted properly, which develops bubbles in the completed product.

3. Mould cooling.
When the component has sufficiently spent the right amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which generates a cool mist. When the product cools, it shrinks a little for ease of removal from the mold. This is another step that depends upon a lot on the ideal timing, since rapid cooling decreases the material too rapidly, causing bending of the material.

4. The removing or de-molding phase.
Once the product inside te mold has cooled adequately, the molder taking care of the process can then extract the finished product from the mould. The process is repeated from the start, giving a number of identical items.

For more information on the different rotational molding options offered for the Friendship WI 53934 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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