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

rotational molding-Hammond-Rotational moulding refers to a plastic production technique that produces hollow stress-free product lines. The technique depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have varying designs, colors and sizes. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The benefit that makes this different from other plastic manufacturing procedures in that no pressure is required. It also has few rivals when it comes down to the manufacture of large size hollow items which are resilient and inexpensive.There is a variety of products that are generated by this process including large water tanks, automobile materials, intricate designed medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility in regards to style 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 Hammond WI 54015, 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

Custom Molded-Hammond-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 Hammond 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 Rotomoulding Process in Detail

This molding system has been used since ancient times for creatingvseverl items. Egyptians for instance, utilized rotational molding procedures in the manufacturing of ceramics. The Swiss were also utilizing this rotation type to create hollow chocolate eggs. Some plastic product lines in the USA were manufactured using this method some time between 1940 and 1950. The procedure has however taken very long to catch on because it was looked at as being a somewhat slow-moving process

1. Mold fitting.
A predetermined volume of polymer in powder form is packed into a hollow mould. The mold is usually made from cast aluminium or sheet steel component. The color tone needed 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 design of plastic assembly.

Pre-heating of the oven starts, 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 locked and positioned inside the oven.

2. The heating and fusion phase.
Once inside the oven, the mould is turned on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done slowly, about 20 rotations per minute. One thing that is critical at this point is the amount of time the mold will spend inside the oven. If it stays to long, the product will lose value and durability, producing a faulty product. If it is removed from the oven too early, the polymer will not have liquefied properly, which generates bubbles in the finished product line.

3. Mold cooling down.
When the product has completely spent the correct amount of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the product cools, it reduces slightly for ease of removal from the mould. This is yet another measure that depends a lot on the ideal timing, since quick cooling decreases the material too rapidly, causing warping of the material.

4. The discharging or de-molding step.
As soon as the product inside te mould has cooled adequately, the molder taking care of the operation can then remove the completed product from the mould. The process is repeated from the start, providing a series of similar items.

For more information on the different rotational molding options offered for the Hammond WI 54015 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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