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rotational moulding-Detroit-Rotational molding pertains to a plastic manufacturing procedure that generates hollow stress-free product lines. The method utilizes high temperatures and bi axial rotation to follow up with seamless, one piece products that have various shapes, colors and sizes. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this unique from other plastic manufacturing methods because no pressure is needed. It also has few competitors when it pertains to the manufacture of sizable hollow items which are durable and inexpensive.There is a variety of products that are developed by this process including large water tanks, automobile materials, sophisticated shaped medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of design 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 Detroit MI 48201, 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 moulding 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 Products-Detroit-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 Detroit 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 Rotomolding Process Components

This molding operation has been used since earlier times for creatingvseverl products. Egyptians for example, used roto-molding systems in the of ceramics. The Swiss were also employing this rotation technique to create hollow chocolate eggs. Some plastic products in the USA were developed utilizing this method some time between 1940 and 1950. The technique has however taken long to take affect because it was looked at as being a rather slow-moving process

1. Mould prep work.
A fixed amount of polymer in particle form is filled into a hollow mould. The mold is usually composeded of cast aluminium or sheet steel material. The color tone needed for the final goods 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 type of plastic assembly.

Pre-heating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then sealed and positioned inside the oven.

2. The heating up and fusion step.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and overlays the inside if the mold. The turning is done gradually, about 20 rotations per minute. 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 component will lose value and durability, generating a faulty item. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which develops bubbles in the completed product line.

3. Mould cooling down.
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 material cools, it reduces slightly for ease of extraction from the mould. This is another procedure that depends a lot on the right timing, since rapid cooling reduces the material too quickly, causing warping of the product.

4. The removing or de-molding step.
When the component within te mould has cooled adequately, the molder taking care of the procedure can then remove the completed product from the mould. The function is repeated from the start, supplying a number of identical product lines.

For more information on the different rotational molding options offered for the Detroit MI 48201, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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