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

roto-molding-Hollis Center-Rotational molding refers to a plastic manufacturing technique that generates hollow stress-free product lines. The function relies on high temperatures and bi axial rotation to come up with seamless, one piece items that have various designs, colors and sizes. This procedure is also called rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The component that makes this different from other plastic manufacturing methods that no pressure is called for. It also has few competitors when it involves the creation of large size hollow products which are long lasting and inexpensive.There is a variety of products that are developed by this process including large size water tanks, automobile items, complex designed medical products, leisure equipment, toys, kayaks, commercial equipment among many others.This is because of the versatility in terms of design and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Hollis Center ME 4042, 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 rotational 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 Products-Hollis Center-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 Hollis Center 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 Rotomolding Process in Detail

This molding operation has been used since ancient times for creatingvseverl items. Egyptians as an example, worked with rotational molding techniques in the of ceramics. The Swiss were also utilizing this rotation method to make hollow chocolate eggs. Some plastic product lines in the USA were created utilizing this approach some time between 1940 and 1950. Given that it was viewed to be a rather slow-moving system, the process has however taken long to catch on

1. Mold prep work.
A fixed amount of polymer in particle form is loaded into a hollow mould. The mold is usually built from cast aluminium or sheet steel substance. The color desired 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 design of plastic assembly.

Pre-heating of the oven starts, and it may be done by either conduction, convection or sometimes radiation. It is warmed to temperatures between 500-700F. The mould with the powdered polymer is then locked and put inside the oven.

2. The heat and fusion step.
Once placed into the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The turning is done gradually, about 20 rotations per minute. One thing that is critical at this moment is the period of time the mould will spend within the oven. If it overstays, the product will lose value and strength, creating a weak item. If it is removed from the oven prematurely, the polymer will not have melted properly, which produces bubbles in the completed item.

3. Mold cooling.
When the material has completely spent the enough 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 material cools, it shrinks somewhat for ease of extraction from the mold. This is yet another procedure that relies a lot on the correct timing, since quick cooling shrinks the material too fast, causing bending of the product.

4. The offloading or de-moulding step.
Once the material within te mold has cooled effectively, the person handling the operation can then extract the finalized item from the mould. The technique is repeated from the start, making a number of exact product lines.

For more information on the different rotational rotomolding options offered for the Hollis Center ME 4042 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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