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rotocasting-Wolverine-Rotational moulding pertains to a plastic production method that generates hollow stress-free products. The technique relies upon high temperatures and bi axial rotation to come up with seamless, one piece products that have many different forms, sizes and colors. This technique is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The function that makes this unique from other plastic manufacturing procedures because no pressure is needed. It also has few contenders when it comes to the manufacture of large hollow products which are long lasting and inexpensive.There is a variety of products that are produced by this process including big water tanks, automobile items, intricate shaped medical items, leisure equipment, toys, kayaks, commercial equipment among many others.This is because of the versatility in terms of style and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Wolverine MI 49799, 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 rotomoulding 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-Wolverine-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 Wolverine 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 Rotomoulding Procedure in Detail

This moulding process has been used since earlier times for creatingvseverl items. Egyptians for example, employed rotomoulding methods in the manufacturing of ceramics. The Swiss were also utilizing this rotation technique to generate hollow chocolate eggs. Some plastic items in the USA were developed utilizing this technique some time between 1940 and 1950. Due to the fact that it was considered to be a somewhat slow-moving method, the process has however taken long to catch on

1. Mold readying.
A predetermined volume of polymer in grain form is packed into a hollow mold. The mold is usually made of cast aluminium or sheet steel material. The coloring wanted for the end item 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 design of plastic assembly.

Preheating of the oven follows, and it may 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 sealed and placed within the oven.

2. The heating and fusion procedure.
Once inside the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The rotation is done slowly and gradually, about 20 spins per sixty seconds. Something that is important at this moment is the amount of time the mold will spend inside the oven. If it overstays, the material will lose stability and strength, producing a weak item. If it is removed from the oven too early, the polymer will not have melted properly, which creates bubbles in the finalized product line.

3. Mold cooling down.
When the component has completely spent the correct amount of time in the oven, it is then extracted 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 a little for ease of extraction from the mold. This is yet another procedure that relies a lot on the ideal timing, since quick cooling shrinks the material too quickly, causing bending of the item.

4. The removing or de-molding step.
Once the material within te mold has cooled successfully, the person taking care of the process can then take out the finished product from the mold. The technique is repeated from the start, making a number of similar items.

For more information on the different rotational molding options offered for the Wolverine MI 49799, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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