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

rotational moulding-Fredericktown-Rotational molding refers to a plastic production practice that produces hollow stress-free product lines. The procedure depends on high temperatures and bi axial rotation to come up with seamless, one piece objects that have several shapes, sizes and colors. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The component that makes this different from other plastic manufacturing methods that no pressure is needed. It also has few competitors when it comes down to the production of large size hollow products which are durable and inexpensive.There is a wide range of items that are developed by this process including big water tanks, automobile items, sophisticated molded medical products, recreation equipment, toys, kayaks, industrial equipment among many others.This is due to the versatility in regards to style and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Fredericktown MO 63645, 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 rotational 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

Custom Molded-Fredericktown-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 Fredericktown 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 Roto-Molding Process in Detail

This molding method has been used since early times for creatingvseverl items. Egyptians as an example, employed rotational molding procedures in the producing of ceramics. The Swiss were also using this rotation type to create hollow chocolate eggs. Some plastic product lines in the USA were developed using this method some time between 1940 and 1950. The technique has however taken long to take affect because it was considered as being a pretty slow process

1. Mould prep work.
A fixed volume of polymer in powder form is filled into a hollow mold. The mould is usually crafted from cast aluminium or sheet steel component. The coloration intended 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 style of plastic manufacturing.

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

2. The heating up and fusion step.
Once inside the oven, the mold is spun on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The spinning is done slowly and gradually, about 20 rotations per min. The main thing that is important at this point is the amount of time the mold will spend inside the oven. If it stays to long, the material will lose stability and durability, producing a poor product. If it is extracted from the oven prematurely, the polymer will not have liquefied properly, which creates bubbles in the completed product.

3. Mould cooling.
When the product has sufficiently spent the right amount of time in the oven, it is then taken out 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 shrinks somewhat for ease of removal from the mold. This is another measure that depends a lot on the correct timing, since rapid cooling reduces the material too quick, causing warping of the item.

4. The removing or de-molding phase.
Once the component inside te mould has cooled correctly, the molder managing the operation can then extract the completed item from the mould. The procedure is repeated from the start, providing a number of similar items.

For more information on the different rotational molding options offered for the Fredericktown MO 63645 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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