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

roto-molding-Boulder-Rotational molding refers to a plastic production procedure that creates hollow stress-free items. The technique relies on high temperatures and bi axial rotation to come up with seamless, one piece products that have many different forms, sizes and colors. This procedure is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures because no pressure is called for. It also has few competitors when it comes to the creation of sizable hollow items which are long-lasting and inexpensive.There is a wide range of products that are generated by this process including large size water tanks, automobile items, intricate molded medical items, recreation equipment, toys, kayaks, industrialized equipment among many others.This is due to the versatility in terms of type and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Boulder CO 80301, 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 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-Boulder-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 Boulder 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 Process in Detail

This molding technique has been used since early times for creatingvseverl product lines. Egyptians for instance, used rotomoulding techniques in the of ceramics. The Swiss were also employing this rotation technique to create hollow chocolate eggs. Some plastic products in the USA were made utilizing this approach some time between 1940 and 1950. The system has however taken very long to take affect because it was looked at to be a rather slow process

1. Mold preparation.
A fixed volume of polymer in grain form is packed into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel component. The coloration preferred for the end item 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 production.

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

2. The heating up and fusion phase.
Once inside the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The spinning is done slowly and gradually, about 20 spins per min. One thing that is crucial at this point is the amount of time the mold will spend within the oven. If it overstays, the product will lose value and durability, producing a faulty product. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which develops bubbles in the finalized product line.

3. Mold cooling down.
When the component has completely 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 a cool mist. When the material cools, it reduces somewhat for ease of removal from the mould. This is yet another step that depends a lot on the right timing, since rapid cooling shrinks the material too quick, causing bending of the item.

4. The un-loading or de-moulding step.
Once the product inside te mold has cooled effectively, the person managing the procedure can then remove the completed item from the mould. The procedure is repeated from the beginning, giving a series of similar items.

For more information on the different rotational rotomolding options offered for the Boulder CO 80301 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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