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rotomolding-Bremen-Rotational molding pertains to a plastic production technique that makes hollow stress-free items. The method relies upon high temperatures and bi axial rotation to come up with seamless, one piece products that have different designs, colors and sizes. This procedure is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this different from other plastic manufacturing processes because no pressure is called for. It also has few contenders when it involves the creation of large size hollow items which are durable and inexpensive.There is a wide range of items that are developed by this process including large size water tanks, automobile products, sophisticated molded medical products, leisure equipment, toys, kayaks, industrial equipment among many others.This is due to the flexibility in terms of style and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Bremen OH 43107, 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-Bremen-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 Bremen 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 Method Components

This molding process has been used since earlier times for creatingvseverl items. Egyptians as an example, used rotocasting solutions in the of ceramics. The Swiss were also employing this rotation format to generate hollow chocolate eggs. Some plastic products in the USA were developed using this approach some time between 1940 and 1950. The process has however taken very long to catch on because it was looked at as being a relatively slow-moving process

1. Mold prep work.
A fixed quantity of polymer in powder form is loaded into a hollow mold. The mould is usually crafted from cast aluminium or sheet steel substance. The coloring chosen for the finished product 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 type of plastic assembly.

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 mold with the powdered polymer is then secured and installed inside the oven.

2. The heat and fusion process.
Once inside the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The rotation is done slowly, about 20 revolutions per sixty seconds. One thing that is vital at this moment is the amount of time the mould will spend within the oven. If it overstays, the product will lose value and strength, making a poor item. If it is taken out from the oven too early, the polymer will not have melted properly, which generates bubbles in the finalized item.

3. Mould cooling down.
When the component has completely spent the right amount 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 a cool mist. When the product cools, it reduces a little for ease of extraction from the mould. This is yet another measure that depends a lot on the right timing, since quick cooling decreases the material too quickly, causing warping of the item.

4. The offloading or de-molding phase.
When the product inside te mould has cooled correctly, the molder managing the procedure can then take out the completed item from the mould. The process is repeated from the beginning, providing a series of identical product lines.

For more information on the different rotational molding options offered for the Bremen OH 43107, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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