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

rotational molding-Nashville-Rotational moulding pertains to a plastic manufacturing technique that creates hollow stress-free product lines. The method depends on high temperatures and bi axial rotation to come up with seamless, one piece products that have several designs, sizes and colors. This method is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing methods that no pressure is required. It also has few competitors when it comes down to the production of large size 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 shaped medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in terms of style 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 Nashville TN 37201, 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

Custom Molding-Nashville-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 Nashville 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 Roto-Molding Process in Detail

This moulding process has been used since early times for creatingvseverl items. Egyptians for instance, worked with roto-molding solutions in the manufacturing of ceramics. The Swiss were also employing this rotation method to create hollow chocolate eggs. Some plastic products in the USA were developed using this approach some time between 1940 and 1950. The process has however taken long to take affect because it was thought of as being a moderately slow-moving process

1. Mold readying.
A predetermined quantity of polymer in grain form is filled into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel component. The colour desired for the finished product 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 format of plastic manufacturing.

Preheating of the oven starts, 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 locked and inserted within the oven.

2. The heating and fusion phase.
Once within the oven, the mould is rotated on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The turning is done slowly, about 20 revolutions per sixty seconds. The main thing that is crucial at this point is the amount of time the mold will spend inside the oven. If it overstays, the product will lose value and durability, creating a faulty item. If it is extracted from the oven prematurely, the polymer will not have flowed properly, which develops bubbles in the finished product.

3. Mold cooling.
When the product has completely spent the enough of time in the oven, it is then taken out for cooling. This can be done by air or water, or sometimes a mixture of both which a cool mist. When the material cools, it shrinks slightly for ease of removal from the mould. This is another procedure that relies a lot on the right timing, since rapid cooling shrinks the material too fast, causing warping of the product.

4. The removing or de-moulding step.
As soon as the product inside te mould has cooled successfully, the person managing the procedure can then take out the finished product from the mould. The procedure is repeated from the start, giving a number of similar products.

For more information on the different rotational molding options offered for the Nashville TN 37201 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to custom molding

Local Resources

Production Example
Google Map