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rotomolding-Winona-Rotational moulding refers to a plastic production procedure that makes hollow stress-free items. The function uses high temperatures and bi axial rotation to follow up with seamless, one piece objects that have several forms, sizes and colors. This method is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The component that makes this different from other plastic manufacturing techniques that no pressure is required. It also has few rivals when it comes to the creation of large hollow items which are resilient and inexpensive.There is a wide range of items that are generated by this process including large size water tanks, automobile products, sophisticated molded medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of design and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Winona KS 67764, 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-Winona-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 Kansas 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 Winona Kansas 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 Method in Detail

This moulding technique has been used since ancient times for creatingvseverl product lines. Egyptians as an example, applied roto-molding solutions in the creating of ceramics. The Swiss were also making use of this rotation technique to make hollow chocolate eggs. Some plastic items in the USA were created utilizing this method some time between 1940 and 1950. Given that it was viewed to be a very slow technique, the procedure has however taken long to become popular

1. Mold preparation.
A fixed measure of polymer in grain form is loaded into a hollow mold. The mold is usually constructed from cast aluminium or sheet steel component. The color tone chosen for the final 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 production.

Pre-heating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then sealed and placed inside the oven.

2. The heating and fusion process.
Once inside the oven, the mould is rotated on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The rotation is done slowly, about 20 rotations per min. Something that is essential at this point is the period of time the mold will spend within the oven. If it overstays, the product will lose value and durability, producing a faulty item. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which creates bubbles in the finished product line.

3. Mould cooling.
When the product has sufficiently spent the correct 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 creates a cool mist. When the material cools, it shrinks a little for ease of removal from the mold. This is another measure that depends a lot on the correct timing, since rapid cooling decreases the material too fast, causing warping of the product.

4. The unloading or de-molding step.
When the material within te mould has cooled properly, the person managing the operation can then extract the finished product from the mould. The technique is repeated from the beginning, making a number of similar items.

For more information on the different rotational rotomolding options offered for the Winona KS 67764 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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