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rotomolding-Negaunee-Rotational molding pertains to a plastic manufacturing practice that produces hollow stress-free items. The method relies on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have various forms, colors and sizes. This procedure is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The feature that makes this different from other plastic manufacturing processes in that no pressure is involved. It also has few rivals when it pertains to the creation of sizable hollow products which are long-lasting and inexpensive.There is a wide variety of products that are developed by this process including big water tanks, automobile materials, sophisticated molded medical products, recreation equipment, toys, kayaks, industrialized equipment among many others.This is due to the flexibility in terms of type and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Negaunee MI 49866, 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 rotocasting 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-Negaunee-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 Negaunee 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 Process Components

This molding technique has been used since ancient times for creatingvseverl product lines. Egyptians as an example, used roto-molding systems in the of ceramics. The Swiss were also employing this rotation style to make hollow chocolate eggs. Some plastic products in the USA were made using this procedure some time between 1940 and 1950. The process has however taken long to take affect because it was considered as being a relatively slow process

1. Mould fitting.
A fixed measure of polymer in grain form is packed into a hollow mould. The mould is usually made from cast aluminium or sheet steel substance. The color tone wanted for the final item is pre compounded into the polymer. The most typically 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 can 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 installed into the oven.

2. The heat and fusion phase.
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 spinning is done slowly and gradually, about 20 spins per sixty seconds. The main thing that is important at this moment is the period of time the mould will spend inside the oven. If it stays to long, the component will lose value and durability, creating a poor item. If it is extracted from the oven too early, the polymer will not have flowed properly, which creates bubbles in the finalized product.

3. Mould cooling.
When the material has sufficiently spent the enough of time in the oven, it is then taken out for cooling. This may be done by air or water, or sometimes a mixture of both which a cool mist. When the component cools, it shrinks a little for ease of extraction from the mold. This is yet another measure that relies a lot on the correct timing, since quick cooling decreases the material too quick, causing warping of the item.

4. The un-loading or de-molding step.
As soon as the component inside te mould has cooled correctly, the person managing the process can then extract the finished product from the mold. The technique is repeated from the beginning, providing a series of similar product lines.

For more information on the different rotational molding options offered for the Negaunee MI 49866, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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