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rotational moulding-London-Rotational moulding refers to a plastic manufacturing solution that creates hollow stress-free items. The procedure uses high temperatures and bi axial rotation to come up with seamless, one piece products that have various designs, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing processes in that no pressure is required. It also has few rivals when it comes down to the production of large size hollow products which are long-lasting and inexpensive.There is a wide range of product lines that are created by this process including big water tanks, automobile materials, sophisticated molded medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is because of 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 London OH 43140, 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-London-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 Ohio 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 London Ohio 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 Components

This molding operation has been used since ancient times for creatingvseverl products. Egyptians for instance, employed rotocasting systems in the creating of ceramics. The Swiss were also applying this rotation design to make hollow chocolate eggs. Some plastic items in the USA were manufactured using this procedure some time between 1940 and 1950. The procedure has however taken long to take affect because it was considered to be a somewhat slow process

1. Mold fitting.
A fixed measure of polymer in grain form is packed into a hollow mold. The mould is usually comprised of cast aluminium or sheet steel substance. The color tone desired for the finished item is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic manufacturing.

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 sealed and installed inside the oven.

2. The heating and fusion phase.
Once placed into the oven, the mould 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 minute. One thing that is essential at this moment is the period of time the mould will spend inside the oven. If it overstays, the product will lose stability and durability, creating a faulty product. If it is removed from the oven too early, the polymer will not have liquefied properly, which develops bubbles in the finalized item.

3. Mould cooling down.
When the product has sufficiently spent the correct amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the component cools, it shrinks somewhat for ease of extraction from the mould. This is one more step that depends a lot on the correct timing, since quick cooling shrinks the material too quickly, causing bending of the item.

4. The unloading or de-moulding step.
As soon as the material inside te mould has cooled successfully, the molder handling the operation can then extract the finished product from the mould. The technique is repeated from the beginning, giving a series of identical products.

For more information on the different rotational molding options offered for the London OH 43140, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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