Looking for rotational molding alternatives in Tennessee? Want affordable custom plastic molding that is cost effective for Maynardville area? Then give us a call at our toll free number 866-971-7861 or request a quote today!

rotomolding-Maynardville-Rotational moulding pertains to a plastic manufacturing method that produces hollow stress-free product lines. The procedure utilizes high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several shapes, sizes and colors. This method is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The function that makes this unique from other plastic manufacturing methods in that no pressure is needed. It also has few rivals when it pertains to the manufacture of large hollow items which are long lasting and inexpensive.There is a wide variety of products that are developed by this process including large size water tanks, automobile products, sophisticated molded medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of design 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 Maynardville TN 37807, 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 Molding-Maynardville-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 Tennessee 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 Maynardville Tennessee 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 in Detail

This molding procedure has been used since ancient times for creatingvseverl product lines. Egyptians for example, worked with rotocasting methods in the of ceramics. The Swiss were also employing this rotation method to generate hollow chocolate eggs. Some plastic product lines in the USA were developed using this procedure some time between 1940 and 1950. Given that it was considered to be a somewhat slow-moving method, the method has however taken long to become popular

1. Mould readying.
A fixed volume of polymer in grain form is packed into a hollow mold. The mold is usually made from cast aluminium or sheet steel substance. The colour needed for the finished 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 format of plastic production.

Pre-heating of the oven starts, 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 sealed and placed within the oven.

2. The heat and fusion phase.
Once inside the oven, the mold is turned on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The rotation is done gradually, about 20 rotations per sixty seconds. One thing that is crucial at this point is the amount of time the mold will spend within the oven. If it overstays, the component will lose stability and durability, generating a poor product. If it is taken out from the oven too early, the polymer will not have melted correctly, which produces bubbles in the finalized product line.

3. Mold cooling down.
When the material has sufficiently spent the right amount 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 generates a cool mist. When the component cools, it shrinks somewhat for ease of removal from the mould. This is another step that depends upon a lot on the right timing, since quick cooling reduces the material too quick, causing warping of the item.

4. The offloading or de-moulding step.
As soon as the material within te mold has cooled correctly, the molder taking care of the process can then remove the finished product from the mould. The function is repeated from the beginning, providing a number of similar product lines.

For more information on the different rotational molding options offered for the Maynardville TN 37807 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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