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

rotomoulding-Sunol-Rotational moulding pertains to a plastic manufacturing practice that generates hollow stress-free product lines. The procedure relies upon high temperatures and bi axial rotation to come up with seamless, one piece products that have varying shapes, colors and sizes. This method is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The component that makes this unique from other plastic manufacturing processes because no pressure is needed. It also has few competitors when it comes down to the creation of large hollow items which are long-lasting and inexpensive.There is a variety of items that are created by this process including large size water tanks, automobile products, sophisticated shaped medical products, leisure equipment, toys, canoes, commercial equipment among many others.This is because of the flexibility in terms of design and shapes that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Sunol CA 94586, 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 roto-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

Plastic Products-Sunol-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 Sunol 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 Method Components

This molding system has been used since early times for creatingvseverl products. Egyptians for instance, used rotomoulding techniques in the creating of ceramics. The Swiss were also working with this rotation format to make hollow chocolate eggs. Some plastic product lines in the USA were developed utilizing this approach some time between 1940 and 1950. The system has however taken very long to take affect because it was thought of to be a moderately slow-moving process

1. Mold prep work.
A predetermined quantity of polymer in particle form is filled into a hollow mold. The mold is usually made from cast aluminium or sheet steel material. The coloring desired for the end item is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this style of plastic production.

Preheating of the oven starts, and it can 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 placed into the oven.

2. The heating and fusion phase.
Once within the oven, the mould is turned on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The rotation is done slowly and gradually, about 20 rotations per min. One thing that is crucial at this moment is the amount of time the mould will spend inside the oven. If it stays to long, the product will lose value and strength, producing a poor item. If it is extracted from the oven prematurely, the polymer will not have liquefied correctly, which creates bubbles in the finished product line.

3. Mould cooling down.
When the material has sufficiently spent the enough of time in the oven, it is then taken out for cooling. This may 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 mold. This is another step that relies a lot on the ideal timing, since quick cooling shrinks the material too quick, causing warping of the material.

4. The offloading or de-molding step.
Once the material within te mold has cooled successfully, the molder handling the procedure can then take out the completed product from the mould. The technique is repeated from the beginning, making a number of identical products.

For more information on the different rotational rotomolding options offered for the Sunol CA 94586 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to plastic manufacturing

Local Resources

Production Example
Google Map