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rotocasting-Oxford-Rotational moulding refers to a plastic manufacturing procedure that generates hollow stress-free items. The procedure utilizes high temperatures and bi axial rotation to come up with seamless, one piece products that have a wide range of shapes, sizes and colors. This method is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The component that makes this unique from other plastic manufacturing methods that no pressure is involved. It also has few competitors when it involves the manufacture of sizable hollow products which are resilient and inexpensive.There is a variety of items that are developed by this process including large size water tanks, automobile products, complex molded medical items, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the versatility in regards to type and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Oxford MA 1540, 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

Custom Molding-Oxford-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 Oxford 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 moulding technique has been used since ancient times for creatingvseverl items. Egyptians as an example, utilized rotomoulding solutions in the creating of ceramics. The Swiss were also utilizing this rotation method to create hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this technique some time between 1940 and 1950. The system has however taken long to catch on because it was thought of to be a moderately slow process

1. Mold preparation.
A predetermined quantity of polymer in grain form is packed into a hollow mould. The mold is usually built from cast aluminium or sheet steel component. The color tone desired for the end item is pre compounded into the polymer. The most commonly used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this design of plastic engineering.

Preheating of the oven starts, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then sealed and put into the oven.

2. The heat and fusion procedure.
Once placed into the oven, the mold is spun on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The spinning is done gradually, about 20 revolutions per sixty seconds. Something that is vital at this moment is the amount of time the mould will spend within the oven. If it stays to long, the component will lose stability and durability, making a faulty item. If it is removed from the oven too early, the polymer will not have flowed properly, which creates bubbles in the finalized item.

3. Mold cooling down.
When the material has sufficiently spent the enough of time in the oven, it is then removed 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 shrinks a little for ease of extraction from the mold. This is yet another measure that depends upon a lot on the ideal timing, since quick cooling shrinks the material too quickly, causing bending of the item.

4. The un-loading or de-moulding step.
As soon as the material inside te mould has cooled properly, the person handling the operation can then take out the finished product from the mold. The technique is repeated from the start, providing a number of identical items.

For more information on the different rotational rotomolding options offered for the Oxford MA 1540 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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