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rotational molding-Wakefield-Rotational moulding refers to a plastic manufacturing method that generates hollow stress-free product lines. The process depends on high temperatures and bi axial rotation to come up with seamless, one piece objects that have various shapes, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The function that makes this unique from other plastic manufacturing procedures in that no pressure is required. It also has few contenders when it comes to the creation of sizable hollow products which are long-lasting and inexpensive.There is a wide variety of items that are developed by this process including large size water tanks, automobile materials, complex designed medical items, leisure equipment, toys, kayaks, industrial equipment among many others.This is because of the versatility in regards to style and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Wakefield MI 49968, 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 rotational 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

Custom Molding-Wakefield-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 Michigan 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 Wakefield Michigan 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 Roto-Molding Procedure Components

This moulding procedure has been used since ancient times for creatingvseverl items. Egyptians for example, worked with rotational molding systems in the of ceramics. The Swiss were also working with this rotation method to make hollow chocolate eggs. Some plastic product lines in the USA were made using this technique some time between 1940 and 1950. Given that it was regarded to be a very slow system, the process has however taken long to catch on

1. Mold fitting.
A fixed measure of polymer in powder form is packed into a hollow mold. The mold is usually made of cast aluminium or sheet steel material. The color tone needed for the final product 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 style of plastic production.

Preheating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mold with the powdered polymer is then secured and inserted within the oven.

2. The heat and fusion step.
Once placed into the oven, the mold is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The turning is done gradually, about 20 rotations per min. The main thing that is essential at this point is the amount of time the mould will spend within the oven. If it stays to long, the material will lose stability and strength, creating a poor product. If it is extracted from the oven too early, the polymer will not have melted correctly, which creates bubbles in the finished product line.

3. Mold cooling.
When the component 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 creates a cool mist. When the product cools, it shrinks slightly for ease of extraction from the mould. This is an additional step that depends upon a lot on the ideal timing, since rapid cooling shrinks the material too rapidly, causing warping of the item.

4. The offloading or de-moulding step.
As soon as the component inside te mould has cooled correctly, the molder handling the process can then remove the finished product from the mold. The procedure is repeated from the beginning, making a number of identical product lines.

For more information on the different rotational molding options offered for the Wakefield MI 49968, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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