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

rotational molding-Grand Marais-Rotational moulding pertains to a plastic production solution that creates hollow stress-free products. The method depends on high temperatures and bi axial rotation to follow up with seamless, one piece items that have different designs, sizes and colors. This technique is also referred to as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The feature that makes this unique from other plastic manufacturing procedures because no pressure is required. It also has few competitors when it comes down to the production of sizable hollow items which are durable and inexpensive.There is a wide variety of product lines that are generated by this process including large size water tanks, automobile items, complex molded medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the flexibility in regards to type and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Grand Marais MN 55604, 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

Custom Molded-Grand Marais-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 Minnesota 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 Grand Marais Minnesota 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 process has been used since ancient times for creatingvseverl items. Egyptians as an example, used rotocasting methods in the creating of ceramics. The Swiss were also applying this rotation method to generate hollow chocolate eggs. Some plastic products in the USA were created utilizing this procedure some time between 1940 and 1950. The technique has however taken very long to take affect because it was thought of as being a pretty slow-moving process

1. Mold fitting.
A fixed quantity of polymer in particle form is packed into a hollow mould. The mold is usually comprised of cast aluminium or sheet steel substance. The color tone preferred for the end product is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this format of plastic production.

Preheating of the oven starts, and it can 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 installed into the oven.

2. The heat and fusion step.
Once inside the oven, the mould is rotated on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The spinning is done gradually, about 20 spins per min. Something that is vital at this moment is the period of time the mould will spend inside the oven. If it overstays, the material will lose value and strength, creating a poor item. If it is extracted from the oven prematurely, the polymer will not have melted correctly, which develops bubbles in the finished item.

3. Mould cooling down.
When the component has completely spent the right amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which a cool mist. When the component cools, it reduces slightly for ease of removal from the mould. This is another procedure that depends upon a lot on the right timing, since rapid cooling shrinks the material too quick, causing warping of the material.

4. The discharging or de-moulding phase.
As soon as the material inside te mold has cooled correctly, the person handling the process can then extract the completed product from the mold. The process is repeated from the start, giving a number of identical items.

For more information on the different rotational rotomolding options offered for the Grand Marais MN 55604 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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