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

The attribute that makes this different from other plastic manufacturing methods that no pressure is called for. It also has few rivals when it comes to the manufacture of large hollow items which are durable and inexpensive.There is a variety of items that are produced by this process including large water tanks, automobile materials, intricate designed medical products, leisure equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in terms of design 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 Washington KS 66968, 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 rotocasting 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-Washington-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 Kansas 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 Washington Kansas 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 Procedure in Detail

This molding method has been used since earlier times for creatingvseverl product lines. Egyptians for instance, utilized rotocasting systems in the manufacturing of ceramics. The Swiss were also working with this rotation type to create hollow chocolate eggs. Some plastic product lines in the USA were developed utilizing this procedure some time between 1940 and 1950. Given that it was thought of to be a somewhat slow-moving procedure, the process has however taken long to catch on

1. Mould prep work.
A fixed measure of polymer in particle form is packed into a hollow mould. The mold is usually built from cast aluminium or sheet steel substance. The color needed for the end goods is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic assembly.

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 sealed and put within the oven.

2. The heat and fusion phase.
Once within the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The spinning is done gradually, about 20 revolutions per minute. Something that is crucial at this moment is the amount of time the mould will spend within the oven. If it stays to long, the component will lose value and strength, producing a poor item. If it is removed from the oven too early, the polymer will not have liquefied correctly, which creates bubbles in the finished item.

3. Mould cooling.
When the component has completely spent the right amount of time in the oven, it is then extracted for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it shrinks a little for ease of removal from the mold. This is another measure that relies a lot on the right timing, since rapid cooling shrinks the material too rapidly, causing bending of the material.

4. The unloading or de-molding phase.
Once the product within te mould has cooled properly, the molder handling the process can then extract the finalized product from the mold. The procedure is repeated from the start, making a number of exact items.

For more information on the different rotational rotomolding options offered for the Washington KS 66968 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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