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

rotational molding-Douglas-Rotational molding refers to a plastic manufacturing solution that produces hollow stress-free product lines. The method utilizes high temperatures and bi axial rotation to come up with seamless, one piece items that have a variety of shapes, sizes and colors. This technique is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this unique from other plastic manufacturing techniques because no pressure is called for. It also has few competitors when it comes to the production of large size hollow products which are resilient and inexpensive.There is a wide variety of products that are generated by this process including large size water tanks, automobile items, complex designed medical items, recreation equipment, toys, canoes, commercial equipment among many others.This is because of the versatility in regards to design and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Douglas MA 1516, 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 Manufacturing-Douglas-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 Douglas 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 Method in Detail

This molding process has been used since early times for creatingvseverl product lines. Egyptians for instance, worked with rotomoulding systems in the creating of ceramics. The Swiss were also utilizing this rotation approach to create hollow chocolate eggs. Some plastic products in the USA were manufactured using this technique some time between 1940 and 1950. The technique has however taken very long to catch on because it was thought of to be a somewhat slow-moving process

1. Mold fitting.
A predetermined measure of polymer in powder form is filled into a hollow mold. The mould is usually comprised of cast aluminium or sheet steel material. The coloration intended for the end 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 format of plastic engineering.

Pre-heating 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 mould with the powdered polymer is then secured and installed within the oven.

2. The heating and fusion step.
Once placed into the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The spinning is done gradually, about 20 revolutions per min. The main thing that is vital at this moment is the amount of time the mold will spend inside the oven. If it stays to long, the component will lose stability and strength, generating a faulty product. If it is taken out from the oven prematurely, the polymer will not have liquefied correctly, which generates bubbles in the finalized product line.

3. Mold cooling.
When the component has completely spent the enough of time in the oven, it is then taken out for cooling. This can be done by air or water, or sometimes a mixture of both which generates a cool mist. When the component cools, it shrinks a little for ease of extraction from the mold. This is an additional procedure that depends upon a lot on the right timing, since quick cooling reduces the material too quick, causing warping of the product.

4. The unloading or de-moulding step.
As soon as the product within te mould has cooled successfully, the molder handling the procedure can then remove the finished item from the mould. The technique is repeated from the beginning, making a number of identical items.

For more information on the different rotational rotomolding options offered for the Douglas MA 1516 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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