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

rotomoulding-Dunstable-Rotational moulding refers to a plastic manufacturing technique that generates hollow stress-free items. The process uses high temperatures and bi axial rotation to follow up with seamless, one piece objects that have a wide range of forms, sizes and colors. This procedure is also referred to as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The function that makes this different from other plastic manufacturing processes that no pressure is involved. It also has few rivals when it pertains to the production of large hollow items which are long-lasting and inexpensive.There is a variety of items that are created by this process including big water tanks, automobile items, complex designed medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of design and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Dunstable MA 1827, 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

Custom Molded-Dunstable-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 Dunstable 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 Rotomolding Process in Detail

This moulding procedure has been used since early times for creatingvseverl items. Egyptians for example, used rotocasting procedures in the of ceramics. The Swiss were also making use of this rotation technique to generate hollow chocolate eggs. Some plastic items in the USA were manufactured utilizing this method some time between 1940 and 1950. Considering that it was considered to be a basically slow-moving process, the system has however taken long to become popular

1. Mold preparation.
A predetermined measure of polymer in powder form is packed into a hollow mold. The mould is usually made of cast aluminium or sheet steel substance. The color tone wanted 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 format of plastic production.

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 mould with the powdered polymer is then sealed and put inside the oven.

2. The heat and fusion procedure.
Once within the oven, the mold is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The spinning is done slowly and gradually, about 20 revolutions per minute. Something that is critical at this point is the amount of time the mould will spend within the oven. If it stays to long, the material will lose value and strength, generating a weak item. If it is extracted from the oven prematurely, the polymer will not have flowed correctly, which creates bubbles in the finished product.

3. Mold cooling down.
When the product has completely spent the enough 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 a cool mist. When the product cools, it reduces slightly for ease of extraction from the mold. This is yet another step that relies a lot on the correct timing, since quick cooling reduces the material too rapidly, causing warping of the product.

4. The offloading or de-molding step.
Once the product within te mould has cooled correctly, the person managing the procedure can then extract the finalized product from the mould. The technique is repeated from the start, making a number of similar items.

For more information on the different rotational rotomolding options offered for the Dunstable MA 1827 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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