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

rotational moulding-Mercer-Rotational molding refers to a plastic production method that generates hollow stress-free product lines. The process depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have many different shapes, colors and sizes. This procedure is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The benefit that makes this unique from other plastic manufacturing processes in that no pressure is required. It also has few contenders when it involves the manufacture of large size hollow products which are long lasting and inexpensive.There is a wide range of items that are generated by this process including big water tanks, automobile products, complex designed medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in regards to style and forms that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Mercer MO 64661, 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 rotomolding 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 Products-Mercer-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 Mercer 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 in Detail

This molding procedure has been used since early times for creatingvseverl items. Egyptians as an example, used roto-molding systems in the producing of ceramics. The Swiss were also employing this rotation type to make hollow chocolate eggs. Some plastic product lines in the USA were made utilizing this approach some time between 1940 and 1950. The process has however taken very long to catch on because it was looked at to be a moderately slow process

1. Mold fitting.
A predetermined quantity of polymer in grain form is packed into a hollow mold. The mould is usually made from cast aluminium or sheet steel material. The colour desired for the final goods 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 style of plastic production.

Pre-heating of the oven starts, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then secured and positioned inside the oven.

2. The heat and fusion phase.
Once placed into the oven, the mold is spun on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The rotation is done gradually, about 20 spins per min. One thing that is important at this moment is the amount of time the mould will spend within the oven. If it stays to long, the product will lose value and durability, making a poor item. If it is taken out from the oven too early, the polymer will not have melted correctly, which develops bubbles in the finished item.

3. Mold cooling.
When the product has completely spent the enough 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 a cool mist. When the material cools, it shrinks slightly for ease of extraction from the mould. This is an additional procedure that depends upon a lot on the ideal timing, since quick cooling decreases the material too quickly, causing bending of the item.

4. The offloading or de-moulding phase.
As soon as the material inside te mould has cooled effectively, the person managing the procedure can then remove the finalized item from the mold. The procedure is repeated from the start, giving a series of similar products.

For more information on the different rotational molding options offered for the Mercer MO 64661 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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