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

roto-molding-Harriman-Rotational moulding pertains to a plastic production procedure that produces hollow stress-free product lines. The process depends on high temperatures and bi axial rotation to come up with seamless, one piece items that have different forms, sizes and colors. This technique is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The function that makes this unique from other plastic manufacturing techniques because no pressure is required. It also has few competitors when it comes down to the manufacture of large size hollow products which are long lasting and inexpensive.There is a wide variety of items that are generated by this process including large size water tanks, automobile products, intricate shaped medical items, leisure equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in terms of design and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Harriman TN 37748, 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 rotomolding 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 Molded-Harriman-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 Harriman 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 Procedure Components

This molding system has been used since ancient times for creatingvseverl products. Egyptians as an example, worked with roto-molding solutions in the creating of ceramics. The Swiss were also applying this rotation approach to create hollow chocolate eggs. Some plastic product lines in the USA were made using this procedure some time between 1940 and 1950. The system has however taken long to take affect because it was considered to be a very slow process

1. Mold preparation.
A predetermined amount of polymer in powder form is filled into a hollow mold. The mold is usually made from cast aluminium or sheet steel substance. The color needed for the finished item is pre compounded into the polymer. The most commonly used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this style of plastic manufacturing.

Preheating of the oven starts, and it can be done by either conduction, convection or sometimes radiation. It is warmed to temperatures between 500-700F. The mould with the powdered polymer is then sealed and inserted into the oven.

2. The heating and fusion procedure.
Once within the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The spinning is done slowly, about 20 spins per minute. One thing that is crucial at this moment is the period of time the mold will spend inside the oven. If it overstays, the product will lose stability and durability, generating a weak product. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which creates bubbles in the finalized item.

3. Mold cooling.
When the product has completely spent the correct amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the component cools, it shrinks somewhat for ease of removal from the mould. This is one more procedure that relies a lot on the ideal timing, since quick cooling reduces the material too quick, causing warping of the product.

4. The offloading or de-molding phase.
When the component inside te mold has cooled adequately, the molder handling the process can then remove the finished item from the mould. The process is repeated from the start, providing a series of exact items.

For more information on the different rotational molding options offered for the Harriman TN 37748 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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