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rotational molding-Ripley-Rotational moulding pertains to a plastic manufacturing practice that makes hollow stress-free product lines. The function relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have several forms, colors and sizes. This technique is also called roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The component that makes this different from other plastic manufacturing procedures that no pressure is needed. It also has few competitors when it involves the manufacture of sizable hollow items which are resilient and inexpensive.There is a wide range of items that are developed by this process including large size water tanks, automobile items, sophisticated molded medical items, recreation equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in terms of design and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Ripley OH 45167, 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 rotomolding 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-Ripley-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 Ohio 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 Ripley Ohio 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 Method Components

This moulding process has been used since early times for creatingvseverl products. Egyptians for example, utilized rotocasting techniques in the making of ceramics. The Swiss were also employing this rotation type to generate hollow chocolate eggs. Some plastic items in the USA were created using this procedure some time between 1940 and 1950. The process has however taken very long to catch on because it was looked at to be a very slow process

1. Mold readying.
A fixed amount of polymer in powder form is filled into a hollow mould. The mould is usually built from cast aluminium or sheet steel component. The coloration chosen for the end product 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 style of plastic assembly.

Pre-heating of the oven starts, and it may be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mould with the powdered polymer is then secured and installed inside the oven.

2. The heat and fusion phase.
Once placed into the oven, the mold is spun on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done slowly and gradually, about 20 spins per min. The main thing that is important at this point is the period of time the mould will spend inside the oven. If it overstays, the component will lose stability and durability, generating a weak product. If it is removed from the oven too early, the polymer will not have melted properly, which generates bubbles in the finalized product line.

3. Mold cooling down.
When the component has sufficiently 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 extraction from the mold. This is yet another procedure that depends a lot on the correct timing, since rapid cooling reduces the material too fast, causing bending of the material.

4. The discharging or de-moulding phase.
Once the material within te mold has cooled successfully, the molder managing the operation can then extract the finished product from the mould. The procedure is repeated from the beginning, making a number of identical products.

For more information on the different rotational molding options offered for the Ripley OH 45167, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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