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

rotocasting-Lincoln-Rotational moulding pertains to a plastic manufacturing technique that creates hollow stress-free product lines. The process relies upon high temperatures and bi axial rotation to come up with seamless, one piece objects that have various shapes, colors and sizes. This technique is also referred to as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The benefit that makes this different from other plastic manufacturing techniques in that no pressure is needed. It also has few competitors when it pertains to the manufacture of large hollow items which are long-lasting and inexpensive.There is a wide variety of product lines that are developed by this process including big water tanks, automobile items, sophisticated designed medical items, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the flexibility in terms of design and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Lincoln MO 65338, 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

Plastic Molding-Lincoln-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 Missouri 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 Lincoln Missouri 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 system has been used since ancient times for creatingvseverl items. Egyptians for instance, applied rotational molding techniques in the manufacturing of ceramics. The Swiss were also employing this rotation design to make hollow chocolate eggs. Some plastic products in the USA were made using this technique 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. Mould fitting.
A predetermined quantity of polymer in grain form is packed into a hollow mould. The mould is usually constructed from cast aluminium or sheet steel component. The coloring needed for the finished product is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type 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 locked and positioned inside the oven.

2. The heating and fusion phase.
Once within the oven, the mold is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The rotation is done gradually, about 20 revolutions per sixty seconds. The main thing that is critical at this point is the period of time the mould will spend inside the oven. If it stays to long, the material will lose value and durability, creating a weak item. If it is removed from the oven too early, the polymer will not have liquefied correctly, which generates bubbles in the finalized product.

3. Mold cooling.
When the product has completely spent the correct 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 creates a cool mist. When the product cools, it reduces somewhat for ease of removal from the mold. This is another procedure that depends upon a lot on the correct timing, since rapid cooling shrinks the material too rapidly, causing warping of the product.

4. The unloading or de-moulding step.
As soon as the product inside te mold has cooled adequately, the molder taking care of the process can then take out the finished item from the mold. The process is repeated from the beginning, providing a number of similar product lines.

For more information on the different rotational molding options offered for the Lincoln MO 65338 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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