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rotational moulding-California City-Rotational molding refers to a plastic manufacturing practice that makes hollow stress-free product lines. The method relies upon high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several shapes, colors and sizes. This procedure is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this unique from other plastic manufacturing methods in that no pressure is involved. It also has few competitors when it comes to the production of large hollow items which are durable and inexpensive.There is a variety of items that are developed by this process including large water tanks, automobile products, intricate shaped medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is because of the versatility in regards to design and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in California City CA 93504, 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-California City-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 California City 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 Roto-Molding Method in Detail

This molding operation has been used since earlier times for creatingvseverl products. Egyptians for instance, used rotocasting methods in the creating of ceramics. The Swiss were also working with this rotation style to make hollow chocolate eggs. Some plastic products in the USA were developed using this technique some time between 1940 and 1950. The process has however taken very long to catch on because it was considered to be a very slow-moving process

1. Mold readying.
A predetermined quantity of polymer in grain form is loaded into a hollow mould. The mold is usually crafted from cast aluminium or sheet steel component. The color tone preferred for the finished 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 type of plastic assembly.

Preheating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mold with the powdered polymer is then sealed and placed into the oven.

2. The heating and fusion step.
Once placed into the oven, the mold is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The turning is done gradually, about 20 spins per min. One thing that is vital at this moment is the period of time the mould will spend within the oven. If it overstays, the component will lose value and strength, producing a poor product. If it is removed from the oven prematurely, the polymer will not have melted properly, which generates bubbles in the finalized product line.

3. Mould cooling down.
When the component has completely 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 a cool mist. When the component cools, it reduces slightly for ease of removal from the mould. This is another measure that relies a lot on the ideal timing, since quick cooling reduces the material too quickly, causing bending of the material.

4. The discharging or de-molding step.
As soon as the component within te mould has cooled adequately, the molder managing the operation can then extract the completed product from the mould. The technique is repeated from the start, giving a series of identical items.

For more information on the different rotational rotomolding options offered for the California City CA 93504 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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