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rotomolding-Powell-Rotational molding pertains to a plastic production technique that makes hollow stress-free product lines. The method depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have varying designs, colors and sizes. This technique is also known as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The component that makes this different from other plastic manufacturing techniques in that no pressure is involved. It also has few competitors when it comes to the creation of large size hollow products which are resilient and inexpensive.There is a wide variety of items that are generated by this process including large size water tanks, automobile materials, complex molded medical items, leisure equipment, toys, canoes, industrialized equipment among many others.This is due to the flexibility in terms of design 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 Powell OH 43065, 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 Manufacturing-Powell-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 Powell 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 Rotomoulding Process in Detail

This moulding system has been used since early times for creatingvseverl products. Egyptians for instance, employed rotomoulding systems in the making of ceramics. The Swiss were also working with this rotation style to create hollow chocolate eggs. Some plastic items in the USA were manufactured utilizing this procedure some time between 1940 and 1950. Considering that it was looked at to be a somewhat slow-moving system, the procedure has however taken long to catch on

1. Mould fitting.
A fixed volume of polymer in powder form is packed into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel substance. The coloring wanted for the final item is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this style of plastic engineering.

Pre-heating 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 locked and installed within the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The spinning is done slowly and gradually, about 20 rotations per minute. The main thing that is essential at this moment is the period of time the mould will spend within the oven. If it overstays, the product will lose stability and strength, producing a weak item. If it is taken out from the oven prematurely, the polymer will not have melted correctly, which develops bubbles in the completed item.

3. Mold cooling down.
When the product has sufficiently 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 generates a cool mist. When the product cools, it reduces a little for ease of removal from the mould. This is another procedure that depends a lot on the ideal timing, since quick cooling decreases the material too quick, causing bending of the item.

4. The un-loading or de-moulding step.
When the product within te mold has cooled adequately, the molder handling the procedure can then remove the finished product from the mould. The technique is repeated from the beginning, making a number of identical products.

For more information on the different rotational molding options offered for the Powell OH 43065, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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