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

rotational moulding-San Jose-Rotational moulding pertains to a plastic production solution that generates hollow stress-free products. The procedure utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have a wide range of forms, sizes and colors. This method is also called rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures that no pressure is involved. It also has few contenders when it involves the production of large size hollow products which are long-lasting and inexpensive.There is a wide variety of items that are produced by this process including big water tanks, automobile products, intricate molded medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in terms of 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 San Jose CA 95101, 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-San Jose-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 San Jose 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 Process Components

This moulding operation has been used since ancient times for creatingvseverl items. Egyptians for instance, utilized rotomoulding techniques in the of ceramics. The Swiss were also using this rotation design to make hollow chocolate eggs. Some plastic items in the USA were manufactured using this approach some time between 1940 and 1950. The process has however taken long to take affect because it was thought of to be a pretty slow process

1. Mold prep work.
A predetermined measure of polymer in grain form is filled into a hollow mold. The mould is usually built from cast aluminium or sheet steel substance. The coloration chosen for the end goods 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 type 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 locked and positioned inside the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mold is rotated on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The turning is done gradually, about 20 rotations per minute. The main thing that is crucial at this moment is the amount of time the mould will spend within the oven. If it stays to long, the material will lose stability and strength, generating a weak item. If it is removed from the oven prematurely, the polymer will not have liquefied correctly, which produces bubbles in the finished item.

3. Mould cooling down.
When the product has completely spent the correct 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 material cools, it shrinks slightly for ease of extraction from the mould. This is one more step that depends upon a lot on the correct timing, since rapid cooling reduces the material too quickly, causing bending of the product.

4. The discharging or de-molding phase.
As soon as the component inside te mould has cooled adequately, the molder managing the procedure can then take out the finished product from the mold. The process is repeated from the start, making a series of identical products.

For more information on the different rotational rotomolding options offered for the San Jose CA 95101 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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