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rotational molding-Columbus-Rotational moulding pertains to a plastic production practice that creates hollow stress-free product lines. The process relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have a variety of shapes, sizes and colors. This technique is also referred to as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The feature that makes this unique from other plastic manufacturing processes because no pressure is involved. It also has few competitors when it comes down to the creation of large size hollow items which are long-lasting and inexpensive.There is a wide range of products that are created by this process including large size water tanks, automobile items, complex shaped medical products, leisure equipment, toys, canoes, commercial equipment among many others.This is because of the flexibility in regards to design 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 Columbus OH 43085, 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 rotational molding 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 Molding-Columbus-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 Columbus 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 Roto-Molding Method in Detail

This moulding technique has been used since earlier times for creatingvseverl items. Egyptians for instance, employed rotomoulding techniques in the producing of ceramics. The Swiss were also applying this rotation technique to make hollow chocolate eggs. Some plastic products in the USA were made utilizing this approach some time between 1940 and 1950. The process has however taken long to catch on because it was thought of to be a relatively slow-moving process

1. Mold prep work.
A predetermined volume of polymer in grain form is filled into a hollow mould. The mould is usually comprised of cast aluminium or sheet steel component. The coloring desired for the end item 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 type of plastic manufacturing.

Preheating of the oven follows, 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 secured and positioned into the oven.

2. The heat and fusion procedure.
Once inside the oven, the mould is turned on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done slowly and gradually, about 20 rotations per min. The main thing that is critical at this point is the amount of time the mold will spend inside the oven. If it overstays, the material will lose stability and durability, making a weak item. If it is taken out from the oven prematurely, the polymer will not have melted correctly, which creates bubbles in the finished product line.

3. Mould cooling.
When the component has completely spent the right amount of time in the oven, it is then extracted for cooling. This can be done by air or water, or sometimes a mixture of both which generates a cool mist. When the component cools, it reduces a little for ease of removal from the mold. This is an additional step that relies a lot on the ideal timing, since quick cooling reduces the material too quickly, causing bending of the item.

4. The discharging or de-moulding step.
Once the component inside te mould has cooled correctly, the molder managing the process can then remove the finalized item from the mold. The function is repeated from the start, providing a series of identical items.

For more information on the different rotational molding options offered for the Columbus OH 43085, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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