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roto-molding-Washington-Rotational molding refers to a plastic manufacturing procedure that makes hollow stress-free products. The procedure relies upon high temperatures and bi axial rotation to come up with seamless, one piece objects that have varying shapes, colors and sizes. This procedure is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The function that makes this different from other plastic manufacturing processes because no pressure is called for. It also has few rivals when it pertains to the creation of large size hollow products which are resilient and inexpensive.There is a wide range of items that are developed by this process including big water tanks, automobile materials, sophisticated designed medical products, leisure equipment, toys, kayaks, industrialized equipment among many others.This is due to the versatility in terms of type and forms that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Washington UT 84780, 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

Plastic Molding-Washington-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 Utah 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 Washington Utah 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 Method in Detail

This molding operation has been used since ancient times for creatingvseverl products. Egyptians for example, applied rotational molding systems in the of ceramics. The Swiss were also working with this rotation type to make hollow chocolate eggs. Some plastic products in the USA were made using this approach some time between 1940 and 1950. The system has however taken very long to catch on because it was looked at to be a very slow process

1. Mold prep work.
A predetermined quantity of polymer in particle form is filled into a hollow mould. The mold is usually made from cast aluminium or sheet steel substance. The colour chosen for the end 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 format of plastic manufacturing.

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

2. The heating and fusion step.
Once within the oven, the mould is spun on two axis so the powdered polymer melts from the heat and overlays the inside if the mold. The rotation is done slowly, about 20 spins per min. The main thing that is important at this point is the period of time the mould will spend within the oven. If it stays to long, the product will lose stability and strength, generating a faulty product. If it is removed from the oven too early, the polymer will not have liquefied correctly, which develops bubbles in the finalized product.

3. Mold cooling.
When the component has sufficiently spent the right 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 generates a cool mist. When the product cools, it shrinks a little for ease of removal from the mould. This is an additional step that depends upon a lot on the correct timing, since quick cooling decreases the material too fast, causing bending of the item.

4. The discharging or de-molding step.
When the product within te mould has cooled successfully, the person taking care of the operation can then extract the finalized product from the mould. The procedure is repeated from the beginning, providing a number of identical items.

For more information on the different rotational rotomolding options offered for the Washington UT 84780 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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