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

rotational moulding-Gilford-Rotational moulding pertains to a plastic manufacturing solution that makes hollow stress-free products. The process relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have a wide range of shapes, colors and sizes. This procedure is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The attribute that makes this unique from other plastic manufacturing methods that no pressure is required. It also has few competitors when it involves the creation of sizable hollow products which are long-lasting and inexpensive.There is a wide variety of items that are produced by this process including large size water tanks, automobile items, complex designed medical items, leisure equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in terms of style and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Gilford NH 48736, 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 Molded-Gilford-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 Gilford 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 Method in Detail

This molding procedure has been used since early times for creatingvseverl product lines. Egyptians for instance, applied rotocasting procedures in the producing of ceramics. The Swiss were also making use of this rotation method to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured utilizing this technique some time between 1940 and 1950. The technique has however taken long to catch on because it was considered to be a somewhat slow-moving process

1. Mould readying.
A fixed volume of polymer in grain form is loaded into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel material. The colour preferred for the end product 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 format of plastic assembly.

Preheating of the oven follows, and it can 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 secured and put inside 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 layers the inside if the mould. The rotation is done slowly and gradually, about 20 rotations per min. The main thing that is critical at this point is the period of time the mold will spend inside the oven. If it overstays, the component will lose stability and durability, creating a poor product. If it is extracted from the oven too early, the polymer will not have flowed properly, which develops bubbles in the finalized product.

3. Mold cooling down.
When the product has sufficiently spent the enough of time in the oven, it is then extracted for cooling. This may be done by air or water, or sometimes a mixture of both which a cool mist. When the product cools, it reduces somewhat for ease of removal from the mould. This is another measure that relies a lot on the correct timing, since quick cooling reduces the material too quick, causing bending of the item.

4. The offloading or de-molding phase.
As soon as the product within te mould has cooled properly, the molder handling the operation can then extract the finished item from the mould. The technique is repeated from the beginning, supplying a number of identical items.

For more information on the different rotational rotomolding options offered for the Gilford NH 48736 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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