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

rotational moulding-Fairhaven-Rotational moulding pertains to a plastic manufacturing method that creates hollow stress-free product lines. The technique uses high temperatures and bi axial rotation to follow up with seamless, one piece products that have a variety of designs, colors and sizes. This procedure is also called roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The function that makes this unique from other plastic manufacturing techniques because no pressure is needed. It also has few rivals when it pertains to the production of large size hollow products which are long lasting and inexpensive.There is a wide variety of items that are created by this process including big water tanks, automobile materials, complex molded medical items, leisure equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility 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 Fairhaven MA 2719, 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-Fairhaven-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 Massachusetts 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 Fairhaven Massachusetts 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 molding method has been used since early times for creatingvseverl product lines. Egyptians for example, employed roto-molding systems in the making of ceramics. The Swiss were also applying this rotation style to create hollow chocolate eggs. Some plastic product lines in the USA were made using this procedure some time between 1940 and 1950. Given that it was considered to be a fairly slow-moving technique, the technique has however taken long to catch on

1. Mold readying.
A predetermined volume of polymer in grain form is packed into a hollow mold. The mould is usually crafted from cast aluminium or sheet steel substance. The colour wanted for the end 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 production.

Pre-heating 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 mold with the powdered polymer is then locked and placed inside the oven.

2. The heating and fusion step.
Once inside the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The rotation is done gradually, about 20 revolutions per minute. Something that is critical at this point is the period of time the mold will spend inside the oven. If it stays to long, the material will lose value and strength, making a poor item. If it is taken out from the oven too early, the polymer will not have liquefied properly, which creates bubbles in the finalized product line.

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 can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the component cools, it shrinks a little for ease of extraction from the mold. This is one more measure that depends a lot on the correct timing, since rapid cooling shrinks the material too rapidly, causing warping of the material.

4. The offloading or de-moulding phase.
As soon as the material within te mould has cooled properly, the molder managing the process can then take out the finished item from the mold. The procedure is repeated from the beginning, providing a series of identical products.

For more information on the different rotational rotomolding options offered for the Fairhaven MA 2719 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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