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

rotocasting-Tomahawk-Rotational moulding refers to a plastic manufacturing procedure that generates hollow stress-free items. The process relies on high temperatures and bi axial rotation to come up with seamless, one piece items that have several shapes, sizes and colors. This method is also referred to as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The feature that makes this different from other plastic manufacturing methods in that no pressure is needed. It also has few contenders when it comes to the creation of large size hollow items which are long-lasting and inexpensive.There is a variety of items that are generated by this process including large size water tanks, automobile items, intricate shaped medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the flexibility in regards to style 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 Tomahawk WI 54487, 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-Tomahawk-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 Wisconsin 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 Tomahawk Wisconsin 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 moulding system has been used since ancient times for creatingvseverl product lines. Egyptians as an example, employed roto-molding methods in the of ceramics. The Swiss were also making use of this rotation type to make hollow chocolate eggs. Some plastic product lines in the USA were developed using this technique some time between 1940 and 1950. Given that it was looked at to be a rather slow-moving system, the approach has however taken long to become popular

1. Mould prep work.
A fixed measure of polymer in powder form is loaded into a hollow mould. The mould is usually constructed from cast aluminium or sheet steel substance. The coloring intended 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 type of plastic manufacturing.

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 within the oven.

2. The heat and fusion procedure.
Once placed into the oven, the mold is rotated on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The spinning is done slowly, about 20 rotations per minute. One thing that is critical at this moment is the amount of time the mould will spend within the oven. If it stays to long, the product will lose value and strength, creating a weak item. If it is extracted from the oven prematurely, the polymer will not have liquefied correctly, which develops bubbles in the finished product.

3. Mold cooling.
When the component has completely spent the right amount 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 product cools, it reduces slightly for ease of extraction from the mold. This is another step that depends a lot on the ideal timing, since rapid cooling reduces the material too fast, causing bending of the material.

4. The removing or de-molding step.
Once the product inside te mold has cooled adequately, the person managing the process can then take out the completed item from the mold. The function is repeated from the start, giving a number of identical products.

For more information on the different rotational molding options offered for the Tomahawk WI 54487 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to plastic manufacturing

Local Resources

Production Example
Google Map