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

rotocasting-Belmont-Rotational moulding refers to a plastic production technique that produces hollow stress-free product lines. The technique relies on high temperatures and bi axial rotation to follow up with seamless, one piece items that have different shapes, colors and sizes. This method is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The benefit that makes this unique from other plastic manufacturing procedures in that no pressure is involved. It also has few rivals when it comes down to the production of sizable hollow items which are long-lasting and inexpensive.There is a wide variety of product lines that are generated by this process including big water tanks, automobile materials, complex molded medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the flexibility in regards to type and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Belmont NH 3220, 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-Belmont-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 Hampshire 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 Belmont New Hampshire 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 method has been used since earlier times for creatingvseverl products. Egyptians for instance, worked with rotocasting techniques in the manufacturing of ceramics. The Swiss were also making use of this rotation approach to create hollow chocolate eggs. Some plastic product lines in the USA were manufactured using this procedure some time between 1940 and 1950. The system has however taken long to catch on because it was looked at as being a somewhat slow-moving process

1. Mould prep work.
A fixed volume of polymer in particle form is packed into a hollow mould. The mold is usually composeded of cast aluminium or sheet steel material. The coloring intended for the end 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 manufacturing.

Preheating of the oven starts, and it may 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 sealed and placed within the oven.

2. The heat and fusion process.
Once within the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The turning is done slowly, about 20 revolutions per min. The main thing that is critical at this moment is the period of time the mold will spend within the oven. If it overstays, the product will lose value and durability, creating a poor item. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which creates bubbles in the completed product.

3. Mould cooling down.
When the component has completely spent the right amount of time in the oven, it is then extracted 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 slightly for ease of extraction from the mold. This is one more step that depends a lot on the right timing, since quick cooling shrinks the material too fast, causing bending of the product.

4. The discharging or de-molding step.
As soon as the product within te mold has cooled successfully, the person taking care of the procedure can then extract the completed product from the mould. The process is repeated from the start, making a series of exact products.

For more information on the different rotational rotomolding options offered for the Belmont NH 3220 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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