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

rotational moulding-Coventry-Rotational moulding refers to a plastic production method that generates hollow stress-free items. The procedure utilizes high temperatures and bi axial rotation to come up with seamless, one piece items that have varying shapes, sizes and colors. This method is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The function that makes this different from other plastic manufacturing techniques that no pressure is called for. It also has few rivals when it involves the manufacture of large hollow items which are long-lasting and inexpensive.There is a wide range of products that are generated by this process including big water tanks, automobile items, sophisticated molded medical items, recreation equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in regards to style and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Coventry RI 2816, 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

Plastic Manufacturing-Coventry-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 Coventry 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 molding system has been used since early times for creatingvseverl product lines. Egyptians for instance, applied roto-molding solutions in the producing of ceramics. The Swiss were also working with this rotation method to make hollow chocolate eggs. Some plastic products in the USA were manufactured using this approach some time between 1940 and 1950. The procedure has however taken long to take affect because it was considered as being a very slow process

1. Mould preparation.
A predetermined amount of polymer in grain form is filled into a hollow mold. The mold is usually built from cast aluminium or sheet steel material. The coloring preferred for the final 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 design of plastic manufacturing.

Pre-heating of the oven follows, 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 put inside the oven.

2. The heat and fusion process.
Once inside the oven, the mold is turned on two axis so the powdered polymer melts from the heat and overlays the inside if the mould. The rotation is done slowly and gradually, about 20 revolutions per minute. Something that is essential at this moment is the amount of time the mould will spend within the oven. If it stays to long, the material will lose value and durability, creating a faulty item. If it is removed from the oven too early, the polymer will not have flowed correctly, which produces bubbles in the completed product.

3. Mould cooling.
When the material has sufficiently 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 material cools, it reduces slightly for ease of removal from the mold. This is yet another measure that depends upon a lot on the right timing, since quick cooling decreases the material too quick, causing warping of the product.

4. The removing or de-molding phase.
Once the material within te mould has cooled properly, the person taking care of the process can then take out the finished item from the mold. The procedure is repeated from the start, making a number of identical product lines.

For more information on the different rotational rotomolding options offered for the Coventry RI 2816 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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