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

rotomoulding-Bellvue-Rotational moulding refers to a plastic production practice that makes hollow stress-free product lines. The procedure relies on high temperatures and bi axial rotation to come up with seamless, one piece products that have different designs, colors and sizes. This technique is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The feature that makes this unique from other plastic manufacturing procedures that no pressure is required. It also has few rivals when it comes to the production of sizable hollow products which are durable and inexpensive.There is a variety of products that are developed by this process including large water tanks, automobile products, sophisticated molded medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in regards to design 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 Bellvue CO 80512, 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 Products-Bellvue-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 Colorado 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 Bellvue Colorado 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 molding system has been used since early times for creatingvseverl products. Egyptians as an example, employed roto-molding methods in the creating of ceramics. The Swiss were also employing this rotation type to create hollow chocolate eggs. Some plastic products in the USA were manufactured using this technique some time between 1940 and 1950. The technique has however taken long to catch on because it was looked at as being a very slow-moving process

1. Mould preparation.
A fixed quantity of polymer in grain form is packed into a hollow mould. The mould is usually comprised of cast aluminium or sheet steel material. The coloring wanted for the end item 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 design of plastic manufacturing.

Preheating of the oven starts, 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 put inside the oven.

2. The heating and fusion phase.
Once within the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The spinning is done slowly, about 20 revolutions per min. The main thing that is important at this moment is the amount of time the mould will spend inside the oven. If it stays to long, the component will lose stability and strength, making a weak item. If it is removed from the oven prematurely, the polymer will not have flowed correctly, which generates bubbles in the finished product.

3. Mold cooling down.
When the material has sufficiently spent the correct amount of time in the oven, it is then extracted for cooling. This may 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 extraction from the mold. This is another procedure that depends upon a lot on the right timing, since quick cooling reduces the material too quick, causing bending of the item.

4. The unloading or de-molding step.
Once the component inside te mold has cooled successfully, the molder handling the process can then remove the finalized product from the mold. The function is repeated from the start, giving a number of identical products.

For more information on the different rotational rotomolding options offered for the Bellvue CO 80512 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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