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

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

The component that makes this unique from other plastic manufacturing processes in that no pressure is required. It also has few rivals when it pertains to the production of large size hollow items which are long-lasting and inexpensive.There is a wide range of product lines that are produced by this process including big water tanks, automobile materials, sophisticated designed medical products, leisure equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in regards to type and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Hanover NH 3755, 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 rotomolding 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 Molded-Hanover-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 Hanover 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 Rotomolding Process Components

This molding operation has been used since ancient times for creatingvseverl products. Egyptians as an example, utilized roto-molding procedures in the manufacturing of ceramics. The Swiss were also working with this rotation type to make hollow chocolate eggs. Some plastic items in the USA were created using this method some time between 1940 and 1950. The system has however taken long to catch on because it was considered to be a somewhat slow-moving process

1. Mould prep work.
A fixed measure of polymer in grain form is filled into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel material. The coloring needed for the finished product 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 format of plastic engineering.

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 locked and positioned within the oven.

2. The heating and fusion process.
Once inside 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, about 20 revolutions per min. Something that is crucial at this moment is the amount of time the mould will spend within the oven. If it stays to long, the component will lose value and durability, generating a faulty product. If it is extracted from the oven too early, the polymer will not have melted properly, which produces bubbles in the completed product line.

3. Mould cooling.
When the component has sufficiently 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 generates a cool mist. When the product cools, it shrinks slightly for ease of extraction from the mould. This is one more measure that depends upon a lot on the right timing, since rapid cooling reduces the material too quick, causing warping of the item.

4. The unloading or de-molding phase.
When the component within te mold has cooled correctly, the person taking care of the process can then remove the finished item from the mold. The technique is repeated from the start, giving a number of similar products.

For more information on the different rotational rotomolding options offered for the Hanover NH 3755 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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