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

roto-molding-Columbia-Rotational moulding pertains to a plastic manufacturing practice that produces hollow stress-free products. The method utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have many different forms, colors and sizes. This technique is also referred to as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The benefit that makes this different from other plastic manufacturing methods because no pressure is required. It also has few competitors when it comes to the creation of large size hollow items which are durable and inexpensive.There is a wide range of products that are produced by this process including large water tanks, automobile materials, complex molded medical products, leisure equipment, toys, canoes, industrialized equipment among many others.This is because of the versatility in regards to style 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 Columbia MO 65201, 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 roto-molding 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-Columbia-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 Columbia 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 Method Components

This moulding procedure has been used since early times for creatingvseverl items. Egyptians for instance, worked with rotational molding techniques in the of ceramics. The Swiss were also working with this rotation method to create hollow chocolate eggs. Some plastic items in the USA were made using this approach some time between 1940 and 1950. Considering that it was regarded to be a relatively slow system, the approach has however taken long to catch on

1. Mold prep work.
A fixed amount of polymer in powder form is loaded into a hollow mold. The mould is usually comprised of cast aluminium or sheet steel material. The colour chosen for the finished 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 style of plastic production.

Preheating of the oven starts, and it may 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 put within the oven.

2. The heat and fusion process.
Once inside the oven, the mold is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The turning is done slowly, about 20 spins per min. The main thing that is crucial at this moment is the amount of time the mould will spend within the oven. If it overstays, the material will lose value and strength, creating a faulty item. If it is removed from the oven too early, the polymer will not have liquefied correctly, which generates bubbles in the completed item.

3. Mould cooling down.
When the material has completely spent the enough of time in the oven, it is then extracted 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 shrinks somewhat for ease of removal from the mold. This is another procedure that relies a lot on the ideal timing, since quick cooling shrinks the material too rapidly, causing bending of the product.

4. The offloading or de-molding phase.
When the component within te mould has cooled properly, the person managing the process can then take out the finalized product from the mould. The process is repeated from the start, providing a number of similar items.

For more information on the different rotational molding options offered for the Columbia MO 65201 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