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

rotational moulding-North Branch-Rotational molding refers to a plastic manufacturing method that makes hollow stress-free items. The method uses high temperatures and bi axial rotation to come up with seamless, one piece products that have varying forms, sizes and colors. This method is also known as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing procedures because no pressure is called for. It also has few rivals when it involves the creation of sizable hollow items which are long-lasting and inexpensive.There is a wide variety of products that are developed by this process including large water tanks, automobile items, complex designed medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in regards to type 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 North Branch MN 55056, 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 rotocasting 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-North Branch-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 North Branch 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 Rotomoulding Process in Detail

This moulding process has been used since ancient times for creatingvseverl product lines. Egyptians for instance, employed rotocasting systems in the creating of ceramics. The Swiss were also working with this rotation technique to make hollow chocolate eggs. Some plastic product lines in the USA were created utilizing this method some time between 1940 and 1950. The system has however taken long to catch on because it was looked at as being a relatively slow process

1. Mold readying.
A fixed amount of polymer in particle form is packed into a hollow mold. The mold is usually constructed from cast aluminium or sheet steel component. The coloration intended for the final 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 manufacturing.

Preheating 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 mold with the powdered polymer is then secured and installed within the oven.

2. The heating and fusion step.
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 mold. The turning is done slowly, about 20 revolutions per minute. The main thing that is vital at this moment is the amount of time the mold will spend inside the oven. If it overstays, the material will lose value and strength, producing a faulty product. If it is extracted from the oven too early, the polymer will not have liquefied correctly, which develops bubbles in the completed product line.

3. Mould cooling down.
When the component has completely spent the enough of time in the oven, it is then extracted for cooling. This can 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 one more procedure that relies a lot on the correct timing, since quick cooling decreases the material too fast, causing bending of the item.

4. The un-loading or de-molding step.
When the product within te mould has cooled properly, the person managing the procedure can then take out the finalized product from the mould. The process is repeated from the beginning, making a number of exact items.

For more information on the different rotational rotomolding options offered for the North Branch MN 55056 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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