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

rotomolding-Greenbush-Rotational molding refers to a plastic manufacturing practice that creates hollow stress-free product lines. The method depends on high temperatures and bi axial rotation to come up with seamless, one piece objects that have many different shapes, colors and sizes. This technique is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The function that makes this different from other plastic manufacturing procedures in that no pressure is called for. It also has few competitors when it pertains to the production of sizable hollow products which are resilient and inexpensive.There is a variety of product lines that are developed by this process including big water tanks, automobile products, intricate designed medical items, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the flexibility 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 Greenbush MI 48738, 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

Custom Molding-Greenbush-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 Michigan 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 Greenbush Michigan 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 procedure has been used since early times for creatingvseverl product lines. Egyptians for example, worked with roto-molding solutions in the manufacturing of ceramics. The Swiss were also utilizing this rotation type to make hollow chocolate eggs. Some plastic items in the USA were manufactured using this technique some time between 1940 and 1950. The technique has however taken very long to take affect because it was thought of as being a somewhat slow-moving process

1. Mould preparation.
A predetermined quantity of polymer in grain form is packed into a hollow mold. The mould is usually made from cast aluminium or sheet steel component. The coloring intended for the finished goods 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 format of plastic engineering.

Preheating of the oven starts, and it may 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 installed into the oven.

2. The heat and fusion process.
Once inside the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The turning is done gradually, about 20 spins per min. 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 stability and strength, generating a weak product. If it is extracted from the oven too early, the polymer will not have melted correctly, which generates bubbles in the finalized product.

3. Mould cooling.
When the component has sufficiently spent the right amount of time in the oven, it is then taken out for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it shrinks slightly for ease of removal from the mold. This is yet another step that depends upon a lot on the right timing, since rapid cooling decreases the material too rapidly, causing bending of the product.

4. The removing or de-moulding phase.
Once the material within te mould has cooled properly, the molder managing the process can then take out the finished product from the mould. The technique is repeated from the start, providing a number of identical products.

For more information on the different rotational molding options offered for the Greenbush MI 48738, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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