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

rotational molding-Bridgton-Rotational moulding pertains to a plastic production procedure that generates hollow stress-free items. The function uses high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several forms, colors and sizes. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The component that makes this unique from other plastic manufacturing methods in that no pressure is involved. It also has few contenders when it pertains to the creation of large size hollow items which are resilient and inexpensive.There is a variety of products that are created by this process including large size water tanks, automobile products, intricate molded medical items, leisure equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in regards to design and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Bridgton ME 4009, 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

Plastic Molding-Bridgton-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 Bridgton 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 Rotomoulding Method in Detail

This molding method has been used since ancient times for creatingvseverl product lines. Egyptians for instance, utilized rotocasting systems in the making of ceramics. The Swiss were also using this rotation type to generate hollow chocolate eggs. Some plastic products in the USA were created using this approach some time between 1940 and 1950. The system has however taken very long to catch on because it was thought of to be a moderately slow-moving process

1. Mold prep work.
A fixed measure of polymer in particle form is loaded into a hollow mold. The mould is usually made of cast aluminium or sheet steel material. The coloring needed for the final goods 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 type of plastic engineering.

Preheating of the oven follows, 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 inside the oven.

2. The heating and fusion phase.
Once within the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The turning is done slowly, about 20 revolutions per minute. One thing that is essential at this moment is the period of time the mould will spend inside the oven. If it stays to long, the product will lose value and durability, producing a weak product. If it is removed from the oven too early, the polymer will not have liquefied correctly, which develops bubbles in the finished product.

3. Mold cooling down.
When the material has completely 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 generates a cool mist. When the product cools, it reduces slightly for ease of removal from the mould. This is one more procedure that relies a lot on the ideal timing, since quick cooling decreases the material too quick, causing warping of the product.

4. The removing or de-moulding step.
Once the product inside te mold has cooled adequately, the molder taking care of the operation can then remove the finished item from the mold. The technique is repeated from the start, giving a number of identical products.

For more information on the different rotational rotomolding options offered for the Bridgton ME 4009 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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