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rotomoulding-West Dennis-Rotational moulding refers to a plastic manufacturing technique that produces hollow stress-free items. The technique uses high temperatures and bi axial rotation to follow up with seamless, one piece items that have varying designs, colors and sizes. This procedure is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The feature that makes this unique from other plastic manufacturing processes because no pressure is needed. It also has few competitors when it comes down to the creation of large size hollow products which are durable and inexpensive.There is a wide variety of items that are developed by this process including big water tanks, automobile items, sophisticated designed medical products, leisure equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in regards to design and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in West Dennis MA 2670, 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 roto-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 Products-West Dennis-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 West Dennis 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 Procedure in Detail

This molding system has been used since ancient times for creatingvseverl products. Egyptians as an example, used roto-molding methods in the producing of ceramics. The Swiss were also making use of this rotation type to make hollow chocolate eggs. Some plastic items in the USA were developed utilizing this method some time between 1940 and 1950. The technique has however taken very long to take affect because it was thought of as being a moderately slow process

1. Mold readying.
A fixed measure of polymer in particle form is filled into a hollow mould. The mould is usually made of cast aluminium or sheet steel substance. The colour preferred for the end product is pre compounded into the polymer. The most often 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 follows, and it can 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 positioned into the oven.

2. The heating and fusion phase.
Once placed into the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The spinning is done slowly and gradually, about 20 rotations per min. Something that is essential at this moment is the amount of time the mould will spend inside the oven. If it overstays, the material will lose value and strength, generating a faulty product. If it is removed from the oven too early, the polymer will not have melted properly, which produces bubbles in the finalized product.

3. Mold cooling down.
When the component has sufficiently spent the enough 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 generates a cool mist. When the material cools, it shrinks somewhat for ease of removal from the mold. This is one more step that relies a lot on the correct timing, since rapid cooling decreases the material too quick, causing bending of the item.

4. The offloading or de-moulding phase.
Once the component inside te mould has cooled adequately, the molder handling the operation can then extract the finished item from the mold. The function is repeated from the start, making a series of identical product lines.

For more information on the different rotational rotomolding options offered for the West Dennis MA 2670 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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