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

roto-molding-Millbrae-Rotational moulding refers to a plastic production solution that makes hollow stress-free items. The procedure relies on high temperatures and bi axial rotation to follow up with seamless, one piece items that have varying shapes, sizes and colors. This procedure is also called rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The component that makes this different from other plastic manufacturing procedures that no pressure is needed. It also has few contenders when it comes to the production of large size hollow items which are durable and inexpensive.There is a variety of products that are produced by this process including large water tanks, automobile materials, complex molded medical products, recreation equipment, toys, kayaks, industrial equipment among many others.This is because of the versatility in regards to 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 Millbrae CA 94030, 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 moulding 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 Molding-Millbrae-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 Millbrae 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 moulding system has been used since ancient times for creatingvseverl items. Egyptians for instance, worked with roto-molding systems in the manufacturing of ceramics. The Swiss were also utilizing this rotation method to create hollow chocolate eggs. Some plastic products in the USA were created utilizing this approach some time between 1940 and 1950. Given that it was looked at to be a somewhat slow-moving procedure, the process has however taken long to become popular

1. Mould fitting.
A predetermined volume of polymer in grain form is packed into a hollow mold. The mould is usually made of cast aluminium or sheet steel material. The coloring desired for the final product 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 production.

Pre-heating of the oven starts, 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 secured and inserted within the oven.

2. The heating and fusion phase.
Once placed into the oven, the mold is spun 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 spins per sixty seconds. The main thing that is crucial at this point is the amount of time the mold will spend within the oven. If it stays to long, the material will lose stability and strength, generating a weak item. If it is taken out from the oven prematurely, the polymer will not have melted correctly, which produces bubbles in the finalized item.

3. Mold cooling.
When the component has sufficiently spent the enough 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 component cools, it shrinks slightly for ease of removal from the mould. This is an additional measure that depends a lot on the correct timing, since quick cooling reduces the material too fast, causing warping of the product.

4. The removing or de-molding step.
Once the product inside te mould has cooled effectively, the person taking care of the process can then take out the finished item from the mould. The process is repeated from the beginning, giving a number of identical product lines.

For more information on the different rotational rotomolding options offered for the Millbrae CA 94030 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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