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

rotomolding-Woonsocket-Rotational moulding refers to a plastic manufacturing technique that generates hollow stress-free items. The process utilizes high temperatures and bi axial rotation to follow up with seamless, one piece items that have different forms, colors and sizes. This procedure is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures because no pressure is involved. It also has few competitors when it pertains to the production of large hollow items which are durable and inexpensive.There is a variety of product lines that are developed by this process including large size water tanks, automobile materials, intricate designed medical items, recreation equipment, toys, canoes, industrialized equipment among many others.This is due to the versatility in terms of style and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Woonsocket RI 2895, 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

Custom Molded-Woonsocket-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 Rhode Island 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 Woonsocket Rhode Island 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 in Detail

This moulding procedure has been used since earlier times for creatingvseverl product lines. Egyptians for instance, employed rotocasting procedures in the of ceramics. The Swiss were also utilizing this rotation type to create hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this procedure some time between 1940 and 1950. The procedure has however taken long to take affect because it was considered to be a rather slow-moving process

1. Mold readying.
A fixed amount of polymer in particle form is filled into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel component. The coloration desired for the finished 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 type of plastic assembly.

Preheating 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 mould with the powdered polymer is then secured and placed into the oven.

2. The heat and fusion phase.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The rotation is done slowly, about 20 rotations per minute. The main thing that is essential at this moment is the amount of time the mold will spend within the oven. If it overstays, the material will lose value and durability, generating a poor item. If it is removed from the oven prematurely, the polymer will not have melted properly, which creates bubbles in the completed item.

3. Mould cooling down.
When the material has sufficiently spent the correct 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 procedure that relies a lot on the ideal timing, since quick cooling shrinks the material too fast, causing warping of the item.

4. The un-loading or de-moulding phase.
As soon as the material within te mold has cooled correctly, the molder handling the procedure can then take out the completed product from the mold. The function is repeated from the beginning, giving a series of identical items.

For more information on the different rotational rotomolding options offered for the Woonsocket RI 2895 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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