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

rotomoulding-Yakima-Rotational molding pertains to a plastic production technique that makes hollow stress-free items. The procedure utilizes high temperatures and bi axial rotation to come up with seamless, one piece products that have different forms, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The function that makes this unique from other plastic manufacturing procedures because no pressure is called for. It also has few rivals when it comes to the manufacture of sizable hollow products which are durable and inexpensive.There is a wide variety of product lines that are developed by this process including large size water tanks, automobile items, complex shaped medical products, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of type and forms that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Yakima WA 98901, 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 roto-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 Molded-Yakima-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 Yakima 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 operation has been used since early times for creatingvseverl products. Egyptians for example, worked with roto-molding procedures in the producing of ceramics. The Swiss were also working with this rotation technique to make hollow chocolate eggs. Some plastic products in the USA were made using this technique some time between 1940 and 1950. The procedure has however taken long to take affect because it was looked at as being a relatively slow process

1. Mould fitting.
A fixed measure of polymer in powder form is packed into a hollow mould. The mold is usually crafted from cast aluminium or sheet steel component. The coloration intended 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 type of plastic manufacturing.

Pre-heating of the oven starts, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mold with the powdered polymer is then locked and placed within the oven.

2. The heat and fusion step.
Once inside the oven, the mold is turned on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done slowly and gradually, about 20 revolutions per minute. The main thing 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, creating a faulty product. If it is extracted from the oven too early, the polymer will not have liquefied properly, which develops bubbles in the finalized product line.

3. Mould cooling down.
When the product has sufficiently spent the correct amount 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 component cools, it shrinks a little for ease of removal from the mould. This is one more step that depends upon a lot on the ideal timing, since rapid cooling reduces the material too quickly, causing bending of the item.

4. The un-loading or de-molding step.
Once the product within te mould has cooled successfully, the molder taking care of the procedure can then extract the finished item from the mold. The procedure is repeated from the beginning, making a number of identical products.

For more information on the different rotational rotomolding options offered for the Yakima WA 98901 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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