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

rotocasting-Queen City-Rotational molding refers to a plastic production technique that produces hollow stress-free products. The method depends on high temperatures and bi axial rotation to come up with seamless, one piece products that have different shapes, sizes and colors. This procedure is also referred to as roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The function that makes this unique from other plastic manufacturing processes in that no pressure is involved. It also has few rivals when it comes down to the production of large size hollow products which are long-lasting and inexpensive.There is a wide variety of product lines that are produced by this process including big water tanks, automobile items, complex designed medical items, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility in terms of style and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Queen City MO 63561, 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 Manufacturing-Queen City-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 Missouri 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 Queen City Missouri 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 Components

This molding system has been used since ancient times for creatingvseverl items. Egyptians for example, employed roto-molding methods in the manufacturing of ceramics. The Swiss were also applying this rotation format to make hollow chocolate eggs. Some plastic products in the USA were created using this approach some time between 1940 and 1950. Because it was considered to be a fairly slow-moving technique, the procedure has however taken long to become popular

1. Mould fitting.
A predetermined volume of polymer in particle form is packed into a hollow mold. The mould is usually made of cast aluminium or sheet steel material. The color desired for the final product 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 format of plastic production.

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 mold with the powdered polymer is then sealed and inserted into the oven.

2. The heating and fusion process.
Once placed into the oven, the mold is spun on two axis so the powdered polymer melts from the heat and overlays the inside if the mould. The rotation is done slowly and gradually, about 20 spins per min. One thing that is vital at this moment is the amount of time the mold will spend within the oven. If it overstays, the product will lose stability and strength, generating a faulty product. If it is removed from the oven too early, the polymer will not have flowed properly, which develops bubbles in the finished product line.

3. Mold cooling.
When the component has sufficiently spent the right amount of time in the oven, it is then removed for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it reduces somewhat for ease of removal from the mould. This is an additional measure that relies a lot on the right timing, since quick cooling shrinks the material too quickly, causing warping of the product.

4. The discharging or de-moulding step.
Once the component within te mold has cooled adequately, the molder managing the procedure can then remove the completed product from the mould. The function is repeated from the beginning, making a number of similar products.

For more information on the different rotational molding options offered for the Queen City MO 63561 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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