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rotomoulding-Plymouth-Rotational moulding pertains to a plastic production practice that makes hollow stress-free products. The function utilizes high temperatures and bi axial rotation to come up with seamless, one piece items that have several forms, sizes and colors. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The attribute that makes this unique from other plastic manufacturing methods in that no pressure is called for. It also has few contenders when it involves the production of large hollow items which are long-lasting and inexpensive.There is a wide range of items that are developed by this process including large size water tanks, automobile products, complex shaped medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the versatility in terms of type and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Plymouth MI 48170, 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-Plymouth-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 Plymouth 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 in Detail

This moulding method has been used since ancient times for creatingvseverl products. Egyptians for example, employed rotational molding techniques in the making of ceramics. The Swiss were also applying this rotation method to create hollow chocolate eggs. Some plastic products in the USA were made using this approach some time between 1940 and 1950. The technique has however taken long to catch on because it was looked at as being a pretty slow process

1. Mold prep work.
A predetermined amount of polymer in powder form is filled into a hollow mould. The mold is usually built from cast aluminium or sheet steel component. The color needed for the final goods 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 format of plastic manufacturing.

Pre-heating of the oven follows, 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 sealed and positioned within the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mold is spun on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The spinning is done gradually, about 20 rotations per sixty seconds. The main thing that is important at this moment is the amount of time the mould will spend within the oven. If it overstays, the product will lose stability and strength, making a weak item. If it is removed from the oven prematurely, the polymer will not have flowed properly, which produces bubbles in the finished product.

3. Mould cooling.
When the component has completely spent the enough 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 product cools, it shrinks a little for ease of extraction from the mould. This is another procedure that depends upon a lot on the ideal timing, since quick cooling shrinks the material too quick, causing warping of the product.

4. The offloading or de-molding phase.
Once the component inside te mould has cooled successfully, the person taking care of the operation can then remove the finalized item from the mold. The technique is repeated from the beginning, giving a number of similar products.

For more information on the different rotational molding options offered for the Plymouth MI 48170, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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