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

rotocasting-Benkelman-Rotational molding refers to a plastic production technique that generates hollow stress-free items. The method relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have different shapes, 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 function that makes this different from other plastic manufacturing processes in that no pressure is required. It also has few rivals when it pertains to the manufacture of large hollow items which are long-lasting and inexpensive.There is a variety of product lines that are generated by this process including big water tanks, automobile items, sophisticated molded medical items, leisure equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in regards to style 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 Benkelman NE 69021, 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 Products-Benkelman-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 Benkelman 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 moulding technique has been used since early times for creatingvseverl items. Egyptians for instance, worked with rotocasting techniques in the making of ceramics. The Swiss were also applying this rotation format to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this method some time between 1940 and 1950. Since it was viewed to be a relatively slow method, the process has however taken long to become popular

1. Mould readying.
A fixed quantity of polymer in powder form is filled into a hollow mould. The mold is usually made of cast aluminium or sheet steel component. The color desired for the finished 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.

Preheating of the oven follows, and it can 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 secured and placed into the oven.

2. The heating and fusion process.
Once placed into the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The rotation is done slowly and gradually, about 20 rotations per min. One thing that is essential at this moment is the period of time the mould will spend inside the oven. If it stays to long, the product will lose value and durability, making a weak item. If it is removed from the oven prematurely, the polymer will not have melted properly, which produces bubbles in the completed product.

3. Mold cooling down.
When the product has sufficiently spent the right amount of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it shrinks somewhat for ease of removal from the mould. This is an additional step that depends upon a lot on the correct timing, since rapid cooling decreases the material too rapidly, causing bending of the material.

4. The offloading or de-molding phase.
When the material within te mould has cooled effectively, the person taking care of the process can then extract the finished item from the mould. The technique is repeated from the start, making a number of similar items.

For more information on the different rotational rotomolding options offered for the Benkelman NE 69021 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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