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

rotational moulding-Oakland-Rotational moulding pertains to a plastic production technique that creates hollow stress-free product lines. The technique relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have various shapes, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The benefit that makes this unique from other plastic manufacturing methods in that no pressure is needed. It also has few rivals when it comes down to the production of large hollow items which are long lasting and inexpensive.There is a wide range of items that are generated by this process including large size water tanks, automobile items, complex molded medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in regards to style 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 Oakland CA 94601, 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 rotocasting 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-Oakland-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 California 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 Oakland California 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 Procedure in Detail

This molding system has been used since ancient times for creatingvseverl items. Egyptians for example, applied rotocasting procedures in the of ceramics. The Swiss were also using this rotation format to generate hollow chocolate eggs. Some plastic products in the USA were manufactured using this method some time between 1940 and 1950. Considering that it was viewed to be a basically slow-moving approach, the procedure has however taken long to become popular

1. Mould preparation.
A predetermined amount of polymer in grain form is filled into a hollow mould. The mold is usually crafted from cast aluminium or sheet steel component. The colour intended for the final item 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 design of plastic engineering.

Pre-heating 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 within the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done gradually, about 20 revolutions per min. Something that is essential at this moment is the period of time the mould will spend inside the oven. If it stays to long, the material will lose value and strength, producing a poor product. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which generates bubbles in the finished product.

3. Mould cooling.
When the product has sufficiently spent the correct amount of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it shrinks a little for ease of extraction from the mould. This is one more measure that relies a lot on the right timing, since quick cooling shrinks the material too fast, causing warping of the product.

4. The removing or de-molding phase.
When the component within te mold has cooled properly, the person managing the process can then extract the finished item from the mold. The function is repeated from the start, giving a series of exact product lines.

For more information on the different rotational rotomolding options offered for the Oakland CA 94601 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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