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roto-molding-Buffalo-Rotational molding pertains to a plastic manufacturing technique that makes hollow stress-free items. The method relies upon high temperatures and bi axial rotation to come up with seamless, one piece products that have several designs, colors and sizes. This method is also referred to as 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 methods that no pressure is involved. It also has few contenders when it comes down to the production of large size hollow products which are long lasting and inexpensive.There is a wide variety of product lines that are produced by this process including big water tanks, automobile items, sophisticated designed medical products, recreation equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in regards to design and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Buffalo NY 14201, 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

Plastic Products-Buffalo-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 New York 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 Buffalo New York 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 in Detail

This molding method has been used since early times for creatingvseverl products. Egyptians as an example, utilized roto-molding systems in the making of ceramics. The Swiss were also working with this rotation technique to generate hollow chocolate eggs. Some plastic products in the USA were created using this method some time between 1940 and 1950. The procedure has however taken long to catch on because it was thought of as being a rather slow process

1. Mold prep work.
A predetermined quantity of polymer in grain form is loaded into a hollow mould. The mould is usually built from cast aluminium or sheet steel material. The coloring intended for the finished goods 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 production.

Pre-heating 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 mold with the powdered polymer is then sealed and inserted inside the oven.

2. The heating up and fusion process.
Once within the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and overlays the inside if the mold. The rotation is done gradually, about 20 revolutions per min. The main thing that is important at this moment is the period of time the mould will spend inside the oven. If it overstays, the component will lose stability and strength, producing a poor item. If it is extracted from the oven too early, the polymer will not have liquefied correctly, which develops bubbles in the finished product.

3. Mould cooling down.
When the component has completely spent the enough 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 material cools, it reduces somewhat for ease of removal from the mould. This is yet another measure that depends upon a lot on the ideal timing, since quick cooling decreases the material too quickly, causing bending of the material.

4. The discharging or de-molding step.
When the product inside te mould has cooled adequately, the molder taking care of the procedure can then take out the finalized product from the mold. The procedure is repeated from the start, giving a series of exact product lines.

For more information on the different rotational molding options offered for the Buffalo NY 14201 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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