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

rotational moulding-Wrentham-Rotational molding refers to a plastic production procedure that makes hollow stress-free products. The method depends on high temperatures and bi axial rotation to follow up with seamless, one piece items that have a wide range of shapes, sizes and colors. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The benefit that makes this unique from other plastic manufacturing techniques because no pressure is involved. It also has few contenders when it involves the production of large hollow items which are long lasting and inexpensive.There is a wide variety of products that are generated by this process including big water tanks, automobile products, complex shaped medical items, recreation equipment, toys, kayaks, industrial equipment among many others.This is due to the versatility in terms of type and shapes that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Wrentham MA 2093, 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 rotocasting 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-Wrentham-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 Wrentham 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 Rotomoulding Process in Detail

This moulding procedure has been used since ancient times for creatingvseverl products. Egyptians as an example, employed roto-molding solutions in the producing of ceramics. The Swiss were also making use of this rotation type to create hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this technique some time between 1940 and 1950. The process has however taken very long to catch on because it was considered to be a moderately slow process

1. Mould fitting.
A predetermined volume of polymer in powder form is packed into a hollow mould. The mold is usually made of cast aluminium or sheet steel component. The color preferred for the final goods 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 can be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mold 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 spun on two axis so the powdered polymer melts from the heat and overlays the inside if the mold. The turning is done slowly and gradually, about 20 rotations per minute. Something that is vital at this moment is the period of time the mould will spend inside the oven. If it overstays, the component will lose value and durability, generating a weak product. If it is taken out from the oven prematurely, the polymer will not have flowed correctly, which creates bubbles in the completed 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 material cools, it shrinks somewhat for ease of removal from the mold. This is one more procedure that relies a lot on the ideal timing, since rapid cooling shrinks the material too rapidly, causing warping of the product.

4. The unloading or de-molding step.
When the material inside te mould has cooled effectively, the person taking care of the operation can then remove the completed item from the mold. The technique is repeated from the beginning, giving a series of similar product lines.

For more information on the different rotational rotomolding options offered for the Wrentham MA 2093 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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