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

rotocasting-Salem-Rotational moulding refers to a plastic production technique that creates hollow stress-free products. The technique depends on high temperatures and bi axial rotation to follow up with seamless, one piece products that have different shapes, sizes and colors. This technique is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this different from other plastic manufacturing procedures that no pressure is involved. It also has few contenders when it comes down to the production of sizable hollow products which are long lasting and inexpensive.There is a wide variety of products that are produced by this process including large size water tanks, automobile items, intricate designed medical products, recreation equipment, toys, kayaks, industrial equipment among many others.This is due to the versatility in terms of design 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 Salem MA 1947, 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-Salem-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 Salem 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 procedure has been used since earlier times for creatingvseverl products. Egyptians as an example, utilized rotational molding solutions in the of ceramics. The Swiss were also utilizing this rotation format to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this method some time between 1940 and 1950. Due to the fact that it was viewed to be a very slow system, the technique has however taken long to become popular

1. Mould readying.
A fixed amount of polymer in grain form is loaded into a hollow mold. The mold is usually made from cast aluminium or sheet steel component. The color tone needed for the final item is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this style of plastic production.

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 mould with the powdered polymer is then sealed and put within the oven.

2. The heating and fusion process.
Once within the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The turning is done gradually, about 20 revolutions per minute. The main thing that is essential at this point is the amount of time the mold will spend inside the oven. If it stays to long, the material will lose value and durability, generating a poor item. If it is extracted from the oven too early, the polymer will not have liquefied properly, which produces bubbles in the completed item.

3. Mould cooling.
When the product has sufficiently spent the right amount 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 creates a cool mist. When the product cools, it shrinks a little for ease of removal from the mould. This is an additional procedure that relies a lot on the right timing, since quick cooling decreases the material too quickly, causing warping of the product.

4. The offloading or de-moulding phase.
Once the component within te mold has cooled adequately, the molder managing the process can then remove the finalized product from the mold. The technique is repeated from the beginning, providing a number of similar products.

For more information on the different rotational rotomolding options offered for the Salem MA 1947 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to custom molded

Local Resources

Production Example
Google Map