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rotomolding-Washington-Rotational moulding pertains to a plastic production procedure that produces hollow stress-free products. The procedure uses high temperatures and bi axial rotation to follow up with seamless, one piece items that have a wide range of forms, sizes and colors. This procedure is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The benefit that makes this unique from other plastic manufacturing methods because no pressure is needed. It also has few competitors when it pertains to the production of large hollow products which are resilient and inexpensive.There is a wide range of product lines that are created by this process including large water tanks, automobile products, complex shaped medical items, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of style and forms that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Washington CA 95986, 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 moulding 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 California 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 California 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 Roto-Molding Process Components

This molding method has been used since ancient times for creatingvseverl products. Egyptians as an example, worked with roto-molding solutions in the making of ceramics. The Swiss were also making use of this rotation method to generate hollow chocolate eggs. Some plastic products in the USA were created using this procedure some time between 1940 and 1950. Given that it was thought of to be a somewhat slow procedure, the process has however taken long to become popular

1. Mold preparation.
A fixed amount of polymer in particle form is filled into a hollow mold. The mold is usually composeded of cast aluminium or sheet steel material. The color preferred for the finished goods is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic production.

Preheating of the oven follows, and it may 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 inserted within the oven.

2. The heat and fusion phase.
Once placed into the oven, the mold is turned on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The turning is done gradually, about 20 rotations per min. Something that is essential at this point is the period of time the mold will spend within the oven. If it overstays, the product will lose stability and durability, generating a weak item. If it is extracted from the oven too early, the polymer will not have melted properly, which generates bubbles in the finalized product.

3. Mold cooling down.
When the material has sufficiently spent the correct amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it reduces a little for ease of extraction from the mold. This is an additional step that relies a lot on the ideal timing, since quick cooling shrinks the material too quickly, causing warping of the material.

4. The unloading or de-moulding phase.
When the material inside te mold has cooled correctly, the molder taking care of the process can then extract the finished product from the mold. The function is repeated from the beginning, making a number of similar items.

For more information on the different rotational rotomolding options offered for the Washington CA 95986 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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