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roto-molding-Hudson-Rotational molding pertains to a plastic manufacturing solution that produces 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 different designs, colors and sizes. This procedure is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The benefit that makes this unique from other plastic manufacturing techniques because no pressure is called for. It also has few competitors when it pertains to the manufacture of large size hollow items which are long-lasting and inexpensive.There is a wide variety of products that are developed by this process including large size water tanks, automobile materials, sophisticated shaped medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is because of the flexibility in regards to design and forms that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Hudson MI 49247, 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 rotomolding 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-Hudson-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 Hudson 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 Components

This moulding process has been used since ancient times for creatingvseverl products. Egyptians for example, used rotomoulding systems in the of ceramics. The Swiss were also utilizing this rotation format to create hollow chocolate eggs. Some plastic product lines in the USA were manufactured using this method some time between 1940 and 1950. The procedure has however taken long to catch on because it was considered as being a pretty slow process

1. Mold preparation.
A predetermined volume of polymer in powder form is loaded into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel component. The color preferred for the finished item 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 design of plastic production.

Preheating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mould with the powdered polymer is then sealed and put within the oven.

2. The heating and fusion procedure.
Once inside the oven, the mold is rotated on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The rotation is done slowly and gradually, about 20 rotations per minute. The main thing that is critical at this moment is the amount of time the mold will spend within the oven. If it overstays, the component will lose stability and strength, producing a faulty product. If it is removed from the oven too early, the polymer will not have liquefied properly, which produces bubbles in the finished item.

3. Mold cooling.
When the product has completely spent the correct 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 generates a cool mist. When the material cools, it shrinks somewhat for ease of extraction from the mold. This is one more procedure that depends upon a lot on the ideal timing, since quick cooling decreases the material too rapidly, causing bending of the material.

4. The offloading or de-molding step.
When the product within te mould has cooled correctly, the molder handling the operation can then take out the completed item from the mould. The procedure is repeated from the beginning, giving a number of similar product lines.

For more information on the different rotational molding options offered for the Hudson MI 49247, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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