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

rotational molding-Isanti-Rotational moulding pertains to a plastic manufacturing method that produces hollow stress-free items. The technique utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have several forms, sizes and colors. This procedure is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The attribute that makes this unique from other plastic manufacturing techniques in that no pressure is required. It also has few rivals when it comes down to the manufacture of sizable hollow products which are resilient and inexpensive.There is a wide variety of products that are produced by this process including big water tanks, automobile products, intricate molded medical items, recreation equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in regards to type and forms that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Isanti MN 55040, 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

Custom Molded-Isanti-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 Isanti 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 in Detail

This molding process has been used since early times for creatingvseverl items. Egyptians for example, applied rotational molding solutions in the manufacturing of ceramics. The Swiss were also utilizing this rotation technique to make hollow chocolate eggs. Some plastic items in the USA were made utilizing this approach some time between 1940 and 1950. Since it was considered to be a fairly slow-moving system, the method has however taken long to become popular

1. Mold fitting.
A fixed measure of polymer in grain form is filled into a hollow mold. The mold is usually comprised of cast aluminium or sheet steel component. The color needed 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 style 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 put within the oven.

2. The heating and fusion step.
Once within the oven, the mold is revolved on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The turning is done slowly and gradually, about 20 rotations per sixty seconds. The main thing that is crucial at this moment is the amount of time the mold will spend inside the oven. If it stays to long, the component will lose stability and durability, creating a faulty item. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which produces bubbles in the finished product.

3. Mould cooling down.
When the component has sufficiently spent the correct 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 creates a cool mist. When the component cools, it shrinks somewhat for ease of extraction from the mould. This is another measure that depends a lot on the correct timing, since rapid cooling reduces the material too quick, causing bending of the item.

4. The unloading or de-moulding phase.
As soon as the product within te mold has cooled adequately, the molder taking care of the procedure can then remove the finished product from the mold. The technique is repeated from the start, providing a series of identical items.

For more information on the different rotational rotomolding options offered for the Isanti MN 55040 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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