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rotational molding-Westminster-Rotational moulding refers to a plastic production technique that makes hollow stress-free items. The method uses high temperatures and bi axial rotation to follow up with seamless, one piece products that have different forms, colors and sizes. This procedure is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The attribute that makes this different from other plastic manufacturing methods because no pressure is needed. It also has few rivals when it comes to the production of large size hollow products which are resilient and inexpensive.There is a variety of products that are developed by this process including large size water tanks, automobile materials, intricate molded medical products, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in regards to type and forms that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Westminster VT 5158, 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 rotomoulding 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-Westminster-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 Vermont 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 Westminster Vermont 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 moulding process has been used since earlier times for creatingvseverl items. Egyptians as an example, worked with rotomoulding techniques in the of ceramics. The Swiss were also employing this rotation approach to create hollow chocolate eggs. Some plastic products in the USA were manufactured using this technique some time between 1940 and 1950. The procedure has however taken long to take affect because it was considered to be a moderately slow process

1. Mould readying.
A predetermined quantity of polymer in powder form is filled into a hollow mould. The mold is usually comprised of cast aluminium or sheet steel substance. The color chosen for the finished goods is pre compounded into the polymer. The most generally 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 may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mold with the powdered polymer is then locked and positioned inside the oven.

2. The heat and fusion procedure.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The turning is done slowly and gradually, about 20 rotations per minute. The main thing that is crucial at this moment is the amount of time the mold will spend inside the oven. If it overstays, the component will lose stability and durability, generating a weak item. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which produces bubbles in the completed product.

3. Mold cooling.
When the component has sufficiently spent the right amount 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 generates a cool mist. When the material cools, it shrinks somewhat for ease of extraction from the mold. This is another procedure that relies a lot on the right timing, since quick cooling shrinks the material too quick, causing warping of the material.

4. The discharging or de-molding phase.
When the component inside te mold has cooled successfully, the molder taking care of the operation can then extract the finished item from the mold. The process is repeated from the beginning, supplying a series of exact product lines.

For more information on the different rotational rotomolding options offered for the Westminster VT 5158 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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