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rotomolding-Flushing-Rotational molding refers to a plastic production technique that makes hollow stress-free items. The procedure depends on high temperatures and bi axial rotation to come up with seamless, one piece items that have a wide range of designs, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing techniques that no pressure is needed. It also has few rivals when it pertains to the creation of large hollow products which are long lasting and inexpensive.There is a variety of product lines that are created by this process including big water tanks, automobile products, complex molded medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is due to the flexibility in terms of style 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 Flushing MI 48433, 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 roto-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

Plastic Molding-Flushing-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 Flushing 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 Process in Detail

This moulding procedure has been used since earlier times for creatingvseverl items. Egyptians for instance, used roto-molding methods in the producing of ceramics. The Swiss were also employing this rotation format to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this procedure some time between 1940 and 1950. The system has however taken very long to catch on because it was thought of to be a very slow-moving process

1. Mould readying.
A predetermined quantity of polymer in powder form is packed into a hollow mold. The mold is usually composeded of cast aluminium or sheet steel material. The colour preferred for the finished item is pre compounded into the polymer. The most commonly used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this design of plastic engineering.

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

2. The heating and fusion process.
Once within the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The spinning is done gradually, about 20 spins per sixty seconds. The main thing that is crucial at this moment is the period of time the mould will spend within the oven. If it overstays, the component will lose stability and durability, generating a weak item. If it is removed from the oven prematurely, the polymer will not have liquefied correctly, which develops bubbles in the finalized product.

3. Mould cooling.
When the material has sufficiently spent the enough of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which a cool mist. When the component cools, it shrinks a little for ease of extraction from the mold. This is one more measure that depends upon a lot on the right timing, since rapid cooling shrinks the material too fast, causing warping of the material.

4. The discharging or de-molding step.
When the material inside te mould has cooled correctly, the person taking care of the operation can then remove the completed product from the mould. The procedure is repeated from the beginning, providing a number of similar products.

For more information on the different rotational molding options offered for the Flushing MI 48433, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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