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

rotational moulding-Stephen-Rotational molding refers to a plastic manufacturing procedure that makes hollow stress-free product lines. The process relies on high temperatures and bi axial rotation to follow up with seamless, one piece products that have various forms, colors and sizes. This procedure is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The feature that makes this unique from other plastic manufacturing procedures in that no pressure is needed. It also has few competitors when it comes down to the creation of large hollow products which are resilient and inexpensive.There is a wide range of products that are developed by this process including large size water tanks, automobile materials, sophisticated molded medical products, leisure equipment, toys, canoes, industrialized equipment among many others.This is because of the versatility in regards to design 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 Stephen MN 56757, 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 Products-Stephen-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 Stephen 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 Procedure in Detail

This molding process has been used since ancient times for creatingvseverl items. Egyptians for example, used roto-molding solutions in the producing of ceramics. The Swiss were also using this rotation type to generate hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this method some time between 1940 and 1950. Given that it was looked at to be a relatively slow-moving system, the system has however taken long to catch on

1. Mold prep work.
A predetermined volume of polymer in grain form is loaded into a hollow mould. The mold is usually composeded of cast aluminium or sheet steel material. The colour chosen for the final product 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 follows, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mold with the powdered polymer is then secured and placed within the oven.

2. The heating up and fusion procedure.
Once inside the oven, the mould is turned on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The turning is done gradually, about 20 rotations per minute. The main thing that is important at this moment is the period of time the mold will spend within the oven. If it stays to long, the product will lose stability and strength, producing a faulty item. If it is removed from the oven prematurely, the polymer will not have flowed correctly, which produces bubbles in the finalized item.

3. Mold cooling.
When the material 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 a cool mist. When the material cools, it shrinks somewhat for ease of removal from the mould. This is yet another measure that depends a lot on the ideal timing, since quick cooling reduces the material too rapidly, causing warping of the item.

4. The offloading or de-molding phase.
As soon as the component within te mould has cooled adequately, the molder managing the process can then take out the finalized item from the mold. The procedure is repeated from the start, giving a number of similar items.

For more information on the different rotational rotomolding options offered for the Stephen MN 56757 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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