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

rotocasting-Petoskey-Rotational molding pertains to a plastic manufacturing practice that produces hollow stress-free items. The method depends on high temperatures and bi axial rotation to follow up with seamless, one piece products that have a variety of forms, colors and sizes. This method is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The feature that makes this unique from other plastic manufacturing techniques that no pressure is involved. It also has few competitors when it pertains to the manufacture of sizable hollow products which are resilient and inexpensive.There is a wide variety of product lines that are developed by this process including large water tanks, automobile products, sophisticated designed medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of 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 Petoskey MI 49770, 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

Custom Molding-Petoskey-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 Petoskey 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 Rotomoulding Method Components

This moulding procedure has been used since early times for creatingvseverl products. Egyptians for instance, utilized rotomoulding solutions in the making of ceramics. The Swiss were also applying this rotation approach to make hollow chocolate eggs. Some plastic products in the USA were developed using this approach some time between 1940 and 1950. The process has however taken very long to take affect because it was thought of as being a pretty slow process

1. Mold preparation.
A predetermined amount of polymer in powder form is loaded into a hollow mould. The mold is usually composeded of cast aluminium or sheet steel material. The color tone intended for the end product 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 manufacturing.

Pre-heating of the oven follows, 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 into the oven.

2. The heat and fusion phase.
Once inside the oven, the mold is spun on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The spinning is done gradually, about 20 revolutions per min. One thing that is vital at this moment is the amount of time the mould will spend within the oven. If it stays to long, the product will lose value and durability, making a faulty item. If it is extracted from the oven too early, the polymer will not have flowed correctly, which develops bubbles in the completed product.

3. Mold cooling down.
When the material 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 reduces a little for ease of extraction from the mould. This is one more measure that depends upon a lot on the right timing, since quick cooling decreases the material too quick, causing warping of the item.

4. The unloading or de-molding step.
Once the product within te mold has cooled effectively, the molder handling the procedure can then remove the finalized item from the mould. The technique is repeated from the start, making a number of exact product lines.

For more information on the different rotational molding options offered for the Petoskey MI 49770, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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