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

rotocasting-Strafford-Rotational molding pertains to a plastic production practice that produces hollow stress-free products. The technique relies on high temperatures and bi axial rotation to follow up with seamless, one piece items that have different forms, colors and sizes. This method is also known as rotomolding 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 that no pressure is called for. It also has few rivals when it involves the manufacture of large size hollow products which are long lasting and inexpensive.There is a variety of products that are produced by this process including large water tanks, automobile items, intricate designed medical items, recreation equipment, toys, kayaks, industrial equipment among many others.This is because of the versatility in regards to type and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Strafford MO 65757, 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 rotational moulding 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-Strafford-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 Strafford 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 Rotomoulding Process Components

This moulding technique has been used since earlier times for creatingvseverl items. Egyptians for instance, used rotocasting methods in the making of ceramics. The Swiss were also employing this rotation style to generate hollow chocolate eggs. Some plastic product lines in the USA were created using this approach some time between 1940 and 1950. Considering that it was viewed to be a very slow-moving approach, the process has however taken long to catch on

1. Mold readying.
A predetermined amount of polymer in powder form is filled into a hollow mold. The mould is usually comprised of cast aluminium or sheet steel material. The coloration chosen for the end item 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 type of plastic production.

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 mould with the powdered polymer is then secured and installed inside the oven.

2. The heat and fusion procedure.
Once within the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The turning is done slowly and gradually, about 20 revolutions per minute. Something that is important at this moment is the period of time the mold will spend within the oven. If it overstays, the material will lose value and durability, generating a weak product. If it is removed from the oven too early, the polymer will not have melted properly, which produces bubbles in the completed product.

3. Mold cooling down.
When the component has completely spent the right amount 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 generates a cool mist. When the component cools, it reduces slightly for ease of extraction from the mould. This is one more measure that depends a lot on the correct timing, since quick cooling shrinks the material too quickly, causing warping of the item.

4. The unloading or de-moulding step.
As soon as the material within te mold has cooled effectively, the person taking care of the procedure can then remove the completed item from the mould. The process is repeated from the start, providing a series of identical products.

For more information on the different rotational molding options offered for the Strafford MO 65757 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 molded

Local Resources

Production Example
Google Map