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rotocasting-Metamora-Rotational moulding refers to a plastic production procedure that makes hollow stress-free items. The process relies upon high temperatures and bi axial rotation to come up with seamless, one piece items that have different forms, colors and sizes. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The component that makes this different from other plastic manufacturing processes that no pressure is required. It also has few rivals when it pertains to the production of large hollow items which are durable and inexpensive.There is a wide range of items that are created by this process including large size water tanks, automobile products, sophisticated designed medical products, recreation equipment, toys, kayaks, industrialized equipment among many others.This is due to the versatility 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 Metamora MI 48455, 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 rotational 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 Manufacturing-Metamora-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 Metamora 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 operation has been used since ancient times for creatingvseverl product lines. Egyptians as an example, utilized roto-molding techniques in the making of ceramics. The Swiss were also making use of this rotation type to generate hollow chocolate eggs. Some plastic product lines in the USA were developed using this technique some time between 1940 and 1950. Given that it was considered to be a fairly slow-moving method, the process has however taken long to become popular

1. Mould preparation.
A predetermined amount of polymer in powder form is filled into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel component. The coloring preferred for the end 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 style of plastic production.

Preheating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mold with the powdered polymer is then sealed and inserted inside the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mould. The rotation is done slowly and gradually, about 20 spins per min. The main thing that is vital 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 poor item. If it is taken out from the oven prematurely, the polymer will not have melted correctly, which generates bubbles in the completed item.

3. Mould cooling down.
When the material has completely spent the correct amount of time in the oven, it is then taken out for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it reduces somewhat for ease of removal from the mold. This is one more procedure that depends upon a lot on the ideal timing, since rapid cooling shrinks the material too quick, causing bending of the product.

4. The removing or de-molding step.
Once the product inside te mold has cooled correctly, the molder handling the process can then remove the completed product from the mold. The function is repeated from the beginning, giving a number of similar products.

For more information on the different rotational molding options offered for the Metamora MI 48455, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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