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

rotocasting-Exeter-Rotational moulding refers to a plastic manufacturing practice that makes hollow stress-free products. The process uses high temperatures and bi axial rotation to come up with seamless, one piece items that have varying forms, sizes and colors. This technique is also called rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The benefit that makes this unique from other plastic manufacturing processes because no pressure is required. It also has few contenders when it comes down to the production of large size hollow products which are resilient and inexpensive.There is a variety of products that are created by this process including big water tanks, automobile items, sophisticated molded medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in terms of design 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 Exeter ME 4435, 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

Plastic Products-Exeter-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 Maine 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 Exeter Maine 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 Method Components

This molding procedure has been used since earlier times for creatingvseverl products. Egyptians for instance, utilized rotational molding systems in the of ceramics. The Swiss were also utilizing this rotation style to make hollow chocolate eggs. Some plastic items in the USA were made using this procedure some time between 1940 and 1950. The system has however taken long to catch on because it was thought of as being a moderately slow-moving process

1. Mould readying.
A predetermined measure of polymer in particle form is filled into a hollow mould. The mould is usually constructed from cast aluminium or sheet steel material. The colour needed 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 type of plastic assembly.

Preheating of the oven starts, 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 installed inside the oven.

2. The heating and fusion process.
Once placed into the oven, the mould is spun on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The rotation is done gradually, about 20 rotations per minute. One thing that is essential at this point is the period of time the mold will spend within the oven. If it overstays, the component will lose value and strength, creating a faulty product. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which creates bubbles in the finished product.

3. Mould cooling down.
When the material has completely spent the right amount 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 a cool mist. When the component cools, it reduces slightly for ease of extraction from the mould. This is yet another procedure that depends upon a lot on the right timing, since quick cooling reduces the material too fast, causing warping of the item.

4. The offloading or de-moulding step.
As soon as the product within te mold has cooled effectively, the molder handling the operation can then take out the finalized item from the mold. The function is repeated from the beginning, supplying a series of identical products.

For more information on the different rotational rotomolding options offered for the Exeter ME 4435 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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