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

rotomolding-Centralia-Rotational molding refers to a plastic manufacturing solution that generates hollow stress-free products. The process depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several forms, sizes and colors. This method is also known as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The feature that makes this unique from other plastic manufacturing methods that no pressure is involved. It also has few rivals when it comes down to the manufacture of large size hollow products which are resilient and inexpensive.There is a variety of products that are produced by this process including big water tanks, automobile materials, sophisticated molded medical items, recreation equipment, toys, kayaks, industrialized equipment among many others.This is because of the flexibility in regards to type and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Centralia WA 98531, 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 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

Custom Molding-Centralia-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 Washington 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 Centralia Washington 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 molding technique has been used since early times for creatingvseverl items. Egyptians as an example, applied rotomoulding procedures in the making of ceramics. The Swiss were also using this rotation method to generate hollow chocolate eggs. Some plastic product lines in the USA were manufactured using this procedure some time between 1940 and 1950. The technique has however taken long to take affect because it was considered as being a somewhat slow-moving process

1. Mould preparation.
A fixed amount of polymer in powder form is packed into a hollow mold. The mold is usually comprised of cast aluminium or sheet steel material. The color 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 starts, and it may 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 locked and positioned within the oven.

2. The heat and fusion procedure.
Once inside the oven, the mould is turned on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done gradually, about 20 rotations per minute. Something that is crucial at this moment is the period of time the mold will spend within the oven. If it overstays, the product will lose stability and durability, making a faulty item. If it is taken out from the oven too early, the polymer will not have liquefied properly, which generates bubbles in the finalized product.

3. Mold cooling down.
When the material has sufficiently spent the right 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 a cool mist. When the product cools, it reduces slightly for ease of extraction from the mould. This is one more step that depends upon a lot on the right timing, since rapid cooling decreases the material too fast, causing warping of the item.

4. The offloading or de-moulding step.
Once the product within te mould has cooled correctly, the molder managing the operation can then take out the completed item from the mould. 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 Centralia WA 98531 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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