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rotomoulding-Richmond-Rotational moulding pertains to a plastic production technique that makes hollow stress-free products. The procedure relies on high temperatures and bi axial rotation to follow up with seamless, one piece items that have various designs, colors and sizes. This method is also called rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The function that makes this unique from other plastic manufacturing procedures that no pressure is called for. It also has few competitors when it comes to the production of large hollow products which are durable and inexpensive.There is a wide range of product lines that are produced by this process including large water tanks, automobile items, sophisticated designed medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is due to 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 Richmond MI 48062, 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-Richmond-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 Richmond 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 Process Components

This molding system has been used since earlier times for creatingvseverl product lines. Egyptians for example, utilized rotomoulding systems in the of ceramics. The Swiss were also employing this rotation approach to generate hollow chocolate eggs. Some plastic items in the USA were developed using this method some time between 1940 and 1950. Since it was regarded to be a very slow procedure, the procedure has however taken long to catch on

1. Mould prep work.
A fixed quantity of polymer in powder form is loaded into a hollow mold. The mold is usually built from cast aluminium or sheet steel substance. The colour needed for the final goods 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 type of plastic engineering.

Preheating of the oven starts, 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 placed inside the oven.

2. The heating up and fusion procedure.
Once inside the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The turning is done slowly, about 20 revolutions per minute. One thing that is vital at this moment is the amount of time the mold will spend inside the oven. If it stays to long, the material will lose stability and strength, generating a weak product. If it is extracted from the oven prematurely, the polymer will not have melted properly, which creates bubbles in the finalized product.

3. Mould cooling down.
When the material has completely spent the correct amount of time in the oven, it is then extracted for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it reduces slightly for ease of removal from the mold. This is yet another step that depends upon a lot on the correct timing, since quick cooling decreases the material too quick, causing warping of the product.

4. The removing or de-molding phase.
As soon as the component within te mould has cooled correctly, the molder taking care of the operation can then remove the finalized item from the mould. The process is repeated from the start, supplying a series of exact product lines.

For more information on the different rotational molding options offered for the Richmond MI 48062, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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