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

rotocasting-Central-Rotational molding pertains to a plastic production method that produces hollow stress-free items. The process utilizes high temperatures and bi axial rotation to come up with seamless, one piece items that have varying shapes, sizes and colors. This technique is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The feature that makes this unique from other plastic manufacturing processes that no pressure is required. It also has few competitors when it involves the manufacture of large size hollow products which are long-lasting and inexpensive.There is a wide range of items that are generated by this process including large size water tanks, automobile items, intricate molded medical products, leisure equipment, toys, kayaks, industrial equipment among many others.This is due to the versatility in terms of type 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 Central SC 29630, 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

Custom Molding-Central-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 South Carolina 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 Central South Carolina 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 procedure has been used since early times for creatingvseverl products. Egyptians for instance, worked with rotocasting procedures in the creating of ceramics. The Swiss were also employing this rotation technique to make hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this method some time between 1940 and 1950. The technique has however taken very long to take affect because it was looked at as being a rather slow-moving process

1. Mold fitting.
A fixed quantity of polymer in grain form is packed into a hollow mould. The mould is usually constructed from cast aluminium or sheet steel material. The color tone desired 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 manufacturing.

Pre-heating 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 mold with the powdered polymer is then secured and put inside the oven.

2. The heating up and fusion process.
Once inside the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The rotation is done gradually, about 20 revolutions per minute. Something that is critical at this moment is the amount of time the mold will spend within the oven. If it overstays, the product will lose stability and strength, creating a faulty product. If it is taken out from the oven prematurely, the polymer will not have liquefied properly, which creates bubbles in the finalized product.

3. Mould cooling.
When the product has sufficiently spent the enough 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 component cools, it shrinks slightly for ease of extraction from the mold. This is another measure that depends upon a lot on the right timing, since quick cooling reduces the material too quickly, causing bending of the product.

4. The discharging or de-molding step.
Once the product inside te mold has cooled adequately, the molder handling the process can then take out the completed item from the mold. The process is repeated from the beginning, giving a series of identical products.

For more information on the different rotational rotomolding options offered for the Central SC 29630 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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