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

rotational moulding-Defiance-Rotational molding refers to a plastic manufacturing practice that makes hollow stress-free items. The process depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have a wide range of shapes, colors and sizes. This method is also referred to as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The attribute that makes this unique from other plastic manufacturing procedures because no pressure is required. It also has few contenders when it involves the manufacture of large hollow items which are durable and inexpensive.There is a wide range of products that are generated by this process including large size water tanks, automobile products, intricate molded medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in regards to design and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Defiance MO 63341, 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

Custom Molded-Defiance-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 Defiance 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 Rotomolding Process Components

This molding system has been used since ancient times for creatingvseverl items. Egyptians for instance, applied rotomoulding solutions in the making of ceramics. The Swiss were also applying this rotation format to generate hollow chocolate eggs. Some plastic items in the USA were created utilizing this technique some time between 1940 and 1950. The process has however taken very long to catch on because it was considered to be a rather slow process

1. Mould fitting.
A fixed measure of polymer in powder form is filled into a hollow mold. The mold is usually comprised of cast aluminium or sheet steel material. The color preferred for the finished goods is pre compounded into the polymer. The most commonly used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this format of plastic manufacturing.

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 mold with the powdered polymer is then locked and installed into the oven.

2. The heat and fusion step.
Once inside the oven, the mould is turned on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The rotation is done gradually, about 20 revolutions per minute. Something that is critical at this point is the period of time the mold will spend within the oven. If it stays to long, the component will lose stability and strength, creating a faulty product. If it is extracted from the oven prematurely, the polymer will not have flowed properly, which generates bubbles in the finished product line.

3. Mould cooling down.
When the product has sufficiently spent the correct 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 material cools, it reduces a little for ease of extraction from the mold. This is yet another step that depends upon a lot on the ideal timing, since quick cooling reduces the material too rapidly, causing bending of the material.

4. The un-loading or de-molding step.
As soon as the material inside te mold has cooled successfully, the molder handling the operation can then remove the completed item from the mould. The function is repeated from the start, providing a number of identical products.

For more information on the different rotational molding options offered for the Defiance MO 63341 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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