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

rotomoulding-Sumner-Rotational moulding pertains to a plastic manufacturing technique that makes hollow stress-free items. The technique uses high temperatures and bi axial rotation to come up with seamless, one piece objects that have different shapes, sizes and colors. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The feature that makes this different from other plastic manufacturing methods in that no pressure is required. It also has few competitors when it pertains to the production of large hollow products which are resilient and inexpensive.There is a wide variety of items that are created by this process including large size water tanks, automobile products, sophisticated shaped medical products, recreation equipment, toys, canoes, industrialized equipment among many others.This is because of the versatility in terms of type and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Sumner WA 98352, 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-Sumner-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 Sumner 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 Method in Detail

This moulding method has been used since early times for creatingvseverl products. Egyptians as an example, worked with roto-molding methods in the manufacturing of ceramics. The Swiss were also employing this rotation technique to create hollow chocolate eggs. Some plastic products in the USA were developed using this technique some time between 1940 and 1950. Because it was viewed to be a relatively slow-moving method, the approach has however taken long to become popular

1. Mould preparation.
A fixed amount of polymer in grain form is loaded into a hollow mold. The mould is usually made of cast aluminium or sheet steel material. The colour chosen for the end product is pre compounded into the polymer. The most commonly used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this format of plastic assembly.

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 mould with the powdered polymer is then locked and positioned inside the oven.

2. The heat and fusion procedure.
Once inside the oven, the mold is turned on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The rotation is done slowly, about 20 rotations per minute. The main thing that is important at this moment is the amount of time the mould will spend within the oven. If it stays to long, the component will lose value and durability, producing a poor item. If it is taken out from the oven prematurely, the polymer will not have flowed correctly, which generates bubbles in the finalized item.

3. Mould cooling down.
When the component has sufficiently spent the enough of time in the oven, it is then taken out 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 a little for ease of removal from the mould. This is another procedure that depends upon a lot on the correct timing, since quick cooling reduces the material too quickly, causing warping of the product.

4. The unloading or de-moulding step.
As soon as the product within te mould has cooled correctly, the person handling the process can then remove the completed item from the mould. The procedure is repeated from the start, supplying a series of exact products.

For more information on the different rotational rotomolding options offered for the Sumner WA 98352 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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