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

rotocasting-Eastpointe-Rotational moulding refers to a plastic manufacturing procedure that creates hollow stress-free items. The technique depends on high temperatures and bi axial rotation to come up with seamless, one piece products that have a variety of designs, sizes and colors. This method is also referred to as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The feature that makes this different from other plastic manufacturing techniques in that no pressure is needed. It also has few contenders when it involves the manufacture of large size hollow products which are resilient and inexpensive.There is a wide variety of items that are developed by this process including large size water tanks, automobile items, complex molded medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in regards to design and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Eastpointe MI 48021, 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

Custom Molding-Eastpointe-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 Eastpointe 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 Procedure Components

This molding operation has been used since ancient times for creatingvseverl products. Egyptians for example, applied rotomoulding systems in the producing of ceramics. The Swiss were also employing this rotation technique to make hollow chocolate eggs. Some plastic items in the USA were manufactured using this approach some time between 1940 and 1950. The system has however taken long to take affect because it was looked at as being a rather slow process

1. Mould readying.
A fixed volume of polymer in powder form is filled into a hollow mould. The mould is usually built from cast aluminium or sheet steel material. The coloration chosen for the end item 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 type of plastic assembly.

Pre-heating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mold with the powdered polymer is then locked and installed into the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mould is turned on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The spinning is done slowly and gradually, about 20 rotations per sixty seconds. The main thing that is critical at this point is the period of time the mold will spend inside the oven. If it stays to long, the product will lose value and durability, making a weak product. If it is extracted from the oven too early, the polymer will not have liquefied properly, which generates bubbles in the finalized product line.

3. Mold cooling.
When the component has completely spent the enough of time in the oven, it is then extracted for cooling. This can be done by air or water, or sometimes a mixture of both which generates a cool mist. When the component cools, it reduces a little for ease of extraction from the mould. This is another step that relies a lot on the right timing, since rapid cooling decreases the material too quickly, causing bending of the product.

4. The removing or de-moulding step.
As soon as the product within te mold has cooled successfully, the person handling the operation can then take out the finalized product from the mold. The procedure is repeated from the beginning, giving a series of exact products.

For more information on the different rotational molding options offered for the Eastpointe MI 48021, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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