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rotational moulding-Dallas-Rotational moulding pertains to a plastic manufacturing method that produces hollow stress-free products. The technique utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have a wide range of forms, colors and sizes. This technique is also known as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The component that makes this different from other plastic manufacturing processes that no pressure is required. It also has few rivals when it comes to the manufacture of sizable hollow products which are long-lasting and inexpensive.There is a variety of items that are created by this process including large water tanks, automobile materials, intricate molded medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in regards to style and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Dallas WI 54733, 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 roto-molding 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-Dallas-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 Dallas 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 Roto-Molding Procedure in Detail

This molding method has been used since ancient times for creatingvseverl items. Egyptians for instance, employed roto-molding techniques in the of ceramics. The Swiss were also employing this rotation type to make hollow chocolate eggs. Some plastic items in the USA were created using this approach some time between 1940 and 1950. The procedure has however taken long to take affect because it was considered as being a very slow process

1. Mould prep work.
A fixed volume of polymer in powder form is loaded into a hollow mold. The mold is usually composeded of cast aluminium or sheet steel component. The color tone intended for the finished product is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this design of plastic manufacturing.

Preheating of the oven follows, 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 secured and inserted into the oven.

2. The heating and fusion phase.
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 spinning is done slowly, about 20 spins per sixty seconds. Something that is critical at this moment is the period of time the mold will spend inside the oven. If it stays to long, the material will lose stability and strength, making a poor item. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which generates bubbles in the finished item.

3. Mould cooling.
When the product has sufficiently 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 creates a cool mist. When the material cools, it shrinks slightly for ease of removal from the mold. This is yet another measure that depends upon a lot on the ideal timing, since quick cooling decreases the material too quickly, causing warping of the material.

4. The discharging or de-molding phase.
Once the material within te mold has cooled successfully, the person taking care of the operation can then extract the finished product from the mold. The technique is repeated from the start, providing a series of identical product lines.

For more information on the different rotational molding options offered for the Dallas WI 54733 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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