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rotational moulding-Memphis-Rotational moulding refers to a plastic production method that produces hollow stress-free items. The method relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have a wide range of designs, colors and sizes. This technique is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The function that makes this different from other plastic manufacturing processes because no pressure is needed. It also has few competitors when it pertains to the creation of large hollow products which are durable and inexpensive.There is a variety of items that are produced by this process including large water tanks, automobile products, sophisticated molded medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility in regards to style and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Memphis MI 48041, 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 rotomoulding 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-Memphis-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 Memphis 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 Roto-Molding Process Components

This molding method has been used since ancient times for creatingvseverl products. Egyptians for example, used rotocasting solutions in the creating of ceramics. The Swiss were also utilizing this rotation approach to create hollow chocolate eggs. Some plastic items in the USA were made utilizing this approach some time between 1940 and 1950. Since it was regarded to be a basically slow-moving process, the system has however taken long to catch on

1. Mold prep work.
A fixed quantity of polymer in particle form is loaded into a hollow mold. The mould is usually crafted from cast aluminium or sheet steel material. The color intended for the final item is pre compounded into the polymer. The most generally used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this format of plastic production.

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 locked and inserted inside the oven.

2. The heat and fusion procedure.
Once within the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The turning is done slowly, about 20 rotations per sixty seconds. The main thing that is critical at this point is the amount of time the mould will spend inside the oven. If it overstays, the component will lose value and strength, making a faulty product. If it is taken out from the oven prematurely, the polymer will not have flowed properly, which produces bubbles in the completed product line.

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 can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it shrinks slightly for ease of extraction from the mould. This is one more step that depends upon a lot on the ideal timing, since quick cooling decreases the material too quick, causing warping of the material.

4. The unloading or de-moulding step.
Once the component within te mould has cooled properly, the person managing the operation can then take out the finalized product from the mold. The process is repeated from the beginning, making a number of similar items.

For more information on the different rotational molding options offered for the Memphis MI 48041, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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