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

rotocasting-Grand Island-Rotational molding pertains to a plastic manufacturing method that produces hollow stress-free product lines. The method relies upon 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 known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The component that makes this different from other plastic manufacturing methods because no pressure is involved. It also has few contenders when it involves the creation of large hollow items which are durable and inexpensive.There is a wide variety of items that are developed by this process including large water tanks, automobile items, intricate designed medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in regards to type and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Grand Island NE 68801, 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 Products-Grand Island-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 Nebraska 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 Grand Island Nebraska 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 in Detail

This molding method has been used since earlier times for creatingvseverl products. Egyptians for example, employed rotational molding methods in the of ceramics. The Swiss were also working with this rotation format to make hollow chocolate eggs. Some plastic items in the USA were made using this approach some time between 1940 and 1950. Considering that it was considered to be a rather slow method, the approach has however taken long to catch on

1. Mould prep work.
A predetermined amount of polymer in particle form is filled into a hollow mold. The mold is usually made from cast aluminium or sheet steel substance. The coloration preferred for the end item 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 format 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 mold with the powdered polymer is then secured and installed within the oven.

2. The heating and fusion procedure.
Once within the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The rotation is done slowly, about 20 spins per sixty seconds. One thing that is important at this point is the period of time the mould will spend inside the oven. If it overstays, the material will lose value and durability, generating a weak item. If it is removed from the oven prematurely, the polymer will not have flowed properly, which produces bubbles in the finished product line.

3. Mold cooling down.
When the component has completely spent the right 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 a cool mist. When the component cools, it shrinks a little for ease of removal from the mold. This is one more procedure that relies a lot on the correct timing, since quick cooling decreases the material too quickly, causing warping of the item.

4. The discharging or de-moulding step.
As soon as the component within te mould has cooled successfully, the molder managing the process can then take out the finished product from the mould. The function is repeated from the start, providing a series of identical items.

For more information on the different rotational rotomolding options offered for the Grand Island NE 68801 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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