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

roto-molding-Monroe-Rotational molding refers to a plastic production practice that creates hollow stress-free products. The process depends on high temperatures and bi axial rotation to come up with seamless, one piece items that have a wide range of shapes, sizes and colors. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The component that makes this unique from other plastic manufacturing methods that no pressure is involved. It also has few contenders when it involves the production of sizable hollow products which are long lasting and inexpensive.There is a wide variety of products that are developed by this process including large water tanks, automobile products, intricate designed medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the flexibility in regards to design and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Monroe WA 98272, 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-Monroe-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 Monroe 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 Roto-Molding Process in Detail

This molding operation has been used since early times for creatingvseverl products. Egyptians for example, utilized rotomoulding procedures in the creating of ceramics. The Swiss were also making use of this rotation design to create hollow chocolate eggs. Some plastic products in the USA were manufactured using this procedure some time between 1940 and 1950. The technique has however taken very long to take affect because it was looked at to be a somewhat slow-moving process

1. Mould prep work.
A fixed quantity of polymer in grain form is packed into a hollow mold. The mold is usually crafted from cast aluminium or sheet steel component. The colour desired for the finished product 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 style of plastic manufacturing.

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

2. The heat and fusion step.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The spinning is done gradually, about 20 spins per minute. One thing that is critical at this point is the period of time the mold will spend inside the oven. If it stays to long, the product will lose stability and strength, producing a faulty product. If it is removed from the oven too early, the polymer will not have melted correctly, which develops bubbles in the finalized product.

3. Mold cooling.
When the material has completely spent the enough 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 component cools, it reduces somewhat for ease of extraction from the mold. This is another procedure that depends upon a lot on the correct timing, since rapid cooling reduces the material too fast, causing bending of the item.

4. The removing or de-moulding phase.
When the product inside te mold has cooled successfully, the molder managing the operation can then extract the finalized item from the mold. The technique is repeated from the beginning, making a series of similar products.

For more information on the different rotational rotomolding options offered for the Monroe WA 98272 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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