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

rotational moulding-Robbinston-Rotational moulding refers to a plastic production practice that makes hollow stress-free product lines. The process depends on high temperatures and bi axial rotation to come up with seamless, one piece items that have various shapes, sizes and colors. This technique is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The feature that makes this unique from other plastic manufacturing procedures that no pressure is called for. It also has few competitors when it pertains to the manufacture of large size hollow items which are long lasting and inexpensive.There is a wide variety of products that are developed by this process including large size water tanks, automobile products, sophisticated shaped medical items, leisure equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in terms of 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 Robbinston ME 4671, 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

Plastic Manufacturing-Robbinston-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 Maine 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 Robbinston Maine 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 Roto-Molding Procedure in Detail

This molding technique has been used since early times for creatingvseverl products. Egyptians for instance, utilized roto-molding solutions in the of ceramics. The Swiss were also utilizing this rotation approach to generate hollow chocolate eggs. Some plastic products in the USA were manufactured using this approach some time between 1940 and 1950. Since it was viewed to be a fairly slow-moving method, the process has however taken long to become popular

1. Mold readying.
A predetermined measure of polymer in powder form is loaded into a hollow mold. The mould is usually composeded of cast aluminium or sheet steel substance. The color desired for the finished item 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 style of plastic assembly.

Preheating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mould with the powdered polymer is then secured and placed into the oven.

2. The heating and fusion step.
Once within the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The rotation is done gradually, about 20 spins per min. The main thing that is crucial at this point is the period of time the mold will spend inside the oven. If it stays to long, the component will lose stability and durability, making a faulty item. If it is taken out from the oven prematurely, the polymer will not have melted properly, which produces bubbles in the completed item.

3. Mould cooling.
When the material has sufficiently spent the right amount 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 generates a cool mist. When the material cools, it reduces slightly for ease of extraction from the mold. This is an additional step that relies a lot on the correct timing, since quick cooling decreases the material too quickly, causing bending of the product.

4. The unloading or de-moulding step.
When the material within te mold has cooled effectively, the molder managing the procedure can then extract the finished item from the mold. The process is repeated from the beginning, giving a series of exact items.

For more information on the different rotational rotomolding options offered for the Robbinston ME 4671 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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