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

rotational molding-East Saint Louis-Rotational moulding refers to a plastic manufacturing method that creates hollow stress-free products. The method uses high temperatures and bi axial rotation to come up with seamless, one piece objects that have different designs, colors and sizes. This technique is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The function that makes this different from other plastic manufacturing methods that no pressure is required. It also has few competitors when it involves the production of large size hollow items which are long lasting and inexpensive.There is a wide range of products that are developed by this process including big water tanks, automobile products, complex molded medical products, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of style and shapes that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in East Saint Louis IL 62201, 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

Custom Molded-East Saint Louis-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 Illinois 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 East Saint Louis Illinois 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 Procedure Components

This moulding system has been used since early times for creatingvseverl items. Egyptians for example, employed rotomoulding solutions in the making of ceramics. The Swiss were also applying this rotation type to make hollow chocolate eggs. Some plastic products in the USA were created utilizing this method some time between 1940 and 1950. The process has however taken long to take affect because it was looked at to be a relatively slow-moving process

1. Mould prep work.
A fixed volume of polymer in grain form is packed into a hollow mold. The mould is usually made of cast aluminium or sheet steel component. The coloration desired for the end goods 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 design of plastic production.

Pre-heating 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 placed into the oven.

2. The heating up and fusion phase.
Once inside the oven, the mould is spun on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The turning is done slowly and gradually, about 20 spins per sixty seconds. Something that is crucial at this moment is the period of time the mould will spend inside the oven. If it overstays, the component will lose value and strength, making a weak item. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which develops bubbles in the finished product.

3. Mould cooling.
When the product has sufficiently spent the correct 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 material cools, it shrinks somewhat for ease of removal from the mould. This is an additional measure that relies a lot on the right timing, since quick cooling decreases the material too quickly, causing warping of the product.

4. The removing or de-moulding step.
Once the component inside te mould has cooled properly, the molder handling the operation can then remove the finished product from the mold. The function is repeated from the start, giving a number of identical product lines.

For more information on the different rotational molding options offered for the East Saint Louis IL 62201 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

Process in Action
Google Map