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

rotomolding-Barnhart-Rotational molding refers to a plastic production solution that makes hollow stress-free items. The method relies upon high temperatures and bi axial rotation to come up with seamless, one piece items that have a wide range of forms, sizes and colors. This method is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The function that makes this different from other plastic manufacturing techniques that no pressure is needed. It also has few competitors when it comes down to the manufacture of sizable hollow products 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 products, intricate shaped medical items, leisure equipment, toys, canoes, industrialized equipment among many others.This is due to the flexibility in terms of style and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Barnhart MO 63012, 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

Plastic Manufacturing-Barnhart-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 Barnhart 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 Rotomolding Process in Detail

This moulding operation has been used since early times for creatingvseverl items. Egyptians for example, employed rotocasting solutions in the producing of ceramics. The Swiss were also making use of this rotation approach to create hollow chocolate eggs. Some plastic product lines in the USA were made utilizing this procedure some time between 1940 and 1950. The technique has however taken very long to take affect because it was looked at as being a rather slow process

1. Mould readying.
A predetermined amount of polymer in powder form is packed into a hollow mould. The mold is usually made from cast aluminium or sheet steel component. The coloring wanted for the final 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 format of plastic engineering.

Pre-heating of the oven follows, 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 inside the oven.

2. The heating and fusion step.
Once within the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The rotation is done slowly and gradually, about 20 rotations per minute. One thing that is crucial at this moment is the period of time the mould will spend within the oven. If it stays to long, the product will lose value and durability, generating a faulty item. If it is extracted from the oven prematurely, the polymer will not have flowed properly, which generates bubbles in the completed item.

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 creates a cool mist. When the material cools, it reduces a little for ease of extraction from the mold. This is another procedure that depends upon a lot on the right timing, since quick cooling decreases the material too rapidly, causing bending of the product.

4. The discharging or de-molding phase.
As soon as the product within te mould has cooled properly, the molder managing the procedure can then extract the completed item from the mold. The technique is repeated from the start, making a series of similar product lines.

For more information on the different rotational molding options offered for the Barnhart MO 63012 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 plastic molding

Local Resources

Production Example
Google Map