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rotocasting-Washington-Rotational molding pertains to a plastic manufacturing solution that produces hollow stress-free items. The method relies on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several designs, sizes and colors. This procedure is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The function that makes this different from other plastic manufacturing processes in that no pressure is needed. It also has few contenders when it involves the production of large hollow products which are long-lasting and inexpensive.There is a wide variety of product lines that are generated by this process including big water tanks, automobile products, sophisticated designed medical products, leisure equipment, toys, kayaks, industrial equipment among many others.This is due to 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 Washington PA 15301, 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 rotomoulding 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 Molded-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 Pennsylvania 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 Pennsylvania 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 in Detail

This moulding procedure has been used since ancient times for creatingvseverl products. Egyptians for instance, utilized roto-molding solutions in the of ceramics. The Swiss were also employing this rotation method to make hollow chocolate eggs. Some plastic products in the USA were made using this technique some time between 1940 and 1950. Considering that it was thought of to be a rather slow approach, the approach has however taken long to become popular

1. Mold readying.
A predetermined measure of polymer in powder form is packed into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel component. The color tone wanted for the final goods 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 design of plastic assembly.

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

2. The heating and fusion procedure.
Once inside the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and overlays the inside if the mould. The spinning is done slowly, about 20 revolutions per minute. Something that is crucial at this moment is the amount of time the mould will spend inside the oven. If it stays to long, the material will lose stability and strength, generating a poor item. If it is removed from the oven prematurely, the polymer will not have melted properly, which creates bubbles in the completed product.

3. Mold cooling down.
When the product has sufficiently spent the correct 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 generates a cool mist. When the product cools, it shrinks a little for ease of extraction from the mold. This is one more measure that relies a lot on the right timing, since rapid cooling reduces the material too quick, causing warping of the item.

4. The removing or de-molding phase.
Once the material inside te mold has cooled properly, the molder taking care of the process can then take out the finalized item from the mould. The technique is repeated from the start, giving a number of exact product lines.

For more information on the different rotational molding options offered for the Washington PA 15301 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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