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rotocasting-West Sacramento-Rotational moulding pertains to a plastic manufacturing procedure that generates hollow stress-free product lines. The procedure relies on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have many different designs, sizes and colors. This procedure is also called rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The feature that makes this unique from other plastic manufacturing methods in that no pressure is needed. It also has few competitors when it comes to the manufacture of large size hollow products which are durable and inexpensive.There is a variety of product lines that are developed by this process including large water tanks, automobile materials, complex molded medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in regards to style and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in West Sacramento CA 95605, 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 Manufacturing-West Sacramento-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 West Sacramento 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 Rotomolding Procedure Components

This moulding system has been used since earlier times for creatingvseverl product lines. Egyptians for example, worked with rotocasting procedures in the of ceramics. The Swiss were also working with this rotation method to create hollow chocolate eggs. Some plastic items in the USA were developed utilizing this approach some time between 1940 and 1950. Due to the fact that it was thought of to be a fairly slow system, the method has however taken long to catch on

1. Mould readying.
A predetermined measure of polymer in powder form is loaded into a hollow mould. The mould is usually comprised of cast aluminium or sheet steel substance. The color tone preferred 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 engineering.

Preheating of the oven follows, and it can 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 sealed and installed inside the oven.

2. The heating and fusion procedure.
Once within 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 and gradually, about 20 revolutions per sixty seconds. One thing that is critical at this point is the period of time the mould will spend inside the oven. If it stays to long, the product will lose value and durability, creating a weak item. If it is extracted from the oven prematurely, the polymer will not have liquefied correctly, which produces bubbles in the finalized item.

3. Mold cooling down.
When the product has sufficiently spent the right amount 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 product cools, it shrinks slightly for ease of extraction from the mould. This is one more procedure that depends a lot on the right timing, since rapid cooling shrinks the material too quickly, causing warping of the product.

4. The un-loading or de-molding step.
When the material inside te mould has cooled effectively, the person taking care of the procedure can then take out the finalized item from the mold. The process is repeated from the start, giving a number of exact products.

For more information on the different rotational rotomolding options offered for the West Sacramento CA 95605 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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