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rotomolding-Seattle-Rotational molding refers to a plastic production procedure that makes hollow stress-free product lines. The function utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have a wide range of designs, sizes and colors. This technique is also referred to as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The benefit that makes this unique from other plastic manufacturing procedures in that no pressure is involved. It also has few rivals when it involves the production of large size hollow products which are durable and inexpensive.There is a wide variety of items that are produced by this process including large water tanks, automobile products, sophisticated designed medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in regards to style and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Seattle WA 98060, 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

Plastic Products-Seattle-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 Seattle 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 Components

This moulding process has been used since earlier times for creatingvseverl items. Egyptians for instance, worked with rotational molding methods in the creating of ceramics. The Swiss were also applying this rotation technique to generate hollow chocolate eggs. Some plastic products in the USA were developed using this procedure some time between 1940 and 1950. Since it was viewed to be a somewhat slow-moving system, the process has however taken long to catch on

1. Mold preparation.
A fixed amount of polymer in particle form is filled into a hollow mold. The mold is usually made of cast aluminium or sheet steel substance. The coloring preferred for the final 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 engineering.

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 sealed and inserted into the oven.

2. The heat and fusion step.
Once within the oven, the mould is spun on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The spinning is done slowly, about 20 revolutions per sixty seconds. The main thing that is vital at this moment is the amount of time the mold will spend within the oven. If it overstays, the material will lose stability and strength, creating a faulty product. If it is extracted from the oven too early, the polymer will not have liquefied properly, which generates bubbles in the completed product line.

3. Mould cooling down.
When the product has sufficiently spent the enough 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 slightly for ease of extraction from the mould. This is yet another procedure that depends a lot on the correct timing, since rapid cooling shrinks the material too quickly, causing warping of the product.

4. The unloading or de-moulding phase.
Once the product inside te mould has cooled effectively, the person managing the process can then take out the completed product from the mould. The function is repeated from the start, giving a number of exact product lines.

For more information on the different rotational rotomolding options offered for the Seattle WA 98060 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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