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roto-molding-New Hartford-Rotational moulding refers to a plastic production practice that makes hollow stress-free product lines. The process utilizes high temperatures and bi axial rotation to follow up with seamless, one piece items that have a variety of forms, sizes and colors. This technique is also known as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The feature that makes this different from other plastic manufacturing processes that no pressure is called for. It also has few competitors when it involves the manufacture of large hollow items which are resilient and inexpensive.There is a variety of product lines that are produced by this process including large water tanks, automobile items, complex designed medical products, leisure equipment, toys, canoes, industrialized equipment among many others.This is because of the versatility in regards to design and forms that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in New Hartford CT 6057, 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 roto-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 Manufacturing-New Hartford-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 Connecticut 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 New Hartford Connecticut 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 Process in Detail

This molding operation has been used since early times for creatingvseverl items. Egyptians for example, worked with rotational molding techniques in the creating of ceramics. The Swiss were also applying this rotation type to generate hollow chocolate eggs. Some plastic products in the USA were developed using this technique some time between 1940 and 1950. Considering that it was regarded to be a fairly slow-moving method, the system has however taken long to catch on

1. Mould fitting.
A predetermined measure of polymer in grain form is loaded into a hollow mold. The mould is usually built from cast aluminium or sheet steel substance. The color desired for the end 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 format of plastic assembly.

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 secured and installed into the oven.

2. The heating up and fusion procedure.
Once within the oven, the mold is turned on two axis so the powdered polymer melts from the heat and overlays the inside if the mold. The spinning is done slowly, about 20 rotations per min. The main thing that is important at this moment is the period of time the mold will spend inside the oven. If it stays to long, the component will lose stability and strength, producing a poor product. If it is taken out from the oven too early, the polymer will not have melted correctly, which generates 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 removed for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the component cools, it reduces somewhat for ease of removal from the mold. This is one more measure that depends a lot on the right timing, since quick cooling decreases the material too fast, causing bending of the item.

4. The unloading or de-moulding step.
When the product inside te mould has cooled effectively, the molder managing the operation can then take out the finalized item from the mold. The function is repeated from the beginning, supplying a number of identical items.

For more information on the different rotational rotomolding options offered for the New Hartford CT 6057 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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