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rotocasting-Leonard-Rotational molding pertains to a plastic manufacturing technique that generates hollow stress-free items. The method relies on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have various shapes, colors and sizes. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The function that makes this different from other plastic manufacturing procedures in that no pressure is required. It also has few competitors when it comes down to the manufacture of large size hollow items which are resilient and inexpensive.There is a wide range of product lines that are created by this process including big water tanks, automobile products, complex shaped medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of type 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 Leonard MI 48367, 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 Products-Leonard-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 Leonard 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 operation has been used since earlier times for creatingvseverl products. Egyptians as an example, worked with rotational molding solutions in the producing of ceramics. The Swiss were also using this rotation type to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this technique some time between 1940 and 1950. The system has however taken long to catch on because it was looked at as being a relatively slow-moving process

1. Mould preparation.
A predetermined quantity of polymer in particle form is packed into a hollow mould. The mould is usually made from cast aluminium or sheet steel component. The colour wanted for the finished 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 design of plastic manufacturing.

Preheating of the oven follows, 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 locked and placed into the oven.

2. The heating and fusion step.
Once inside the oven, the mold is turned on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mould. The turning is done slowly and gradually, about 20 revolutions per sixty seconds. Something that is essential at this moment is the amount of time the mould will spend inside the oven. If it overstays, the material will lose stability and strength, making a faulty product. If it is taken out from the oven too early, the polymer will not have flowed properly, which creates bubbles in the completed item.

3. Mould cooling down.
When the product has completely spent the right amount of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which a cool mist. When the product cools, it shrinks slightly for ease of extraction from the mould. This is one more step that depends a lot on the right timing, since rapid cooling decreases the material too fast, causing warping of the material.

4. The discharging or de-molding phase.
Once the product within te mold has cooled successfully, the molder managing the operation can then extract the finalized item from the mould. The technique is repeated from the beginning, supplying a number of identical product lines.

For more information on the different rotational molding options offered for the Leonard MI 48367, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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