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

rotocasting-Bowling Green-Rotational molding refers to a plastic manufacturing method that produces hollow stress-free items. The method depends on high temperatures and bi axial rotation to follow up with seamless, one piece items that have varying designs, sizes and colors. This technique is also referred to as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The function that makes this unique from other plastic manufacturing processes that no pressure is involved. It also has few contenders when it comes to the production of large size hollow products which are durable and inexpensive.There is a wide variety of products that are developed by this process including big water tanks, automobile products, intricate shaped medical products, leisure equipment, toys, kayaks, industrial equipment among many others.This is because of the flexibility in regards to design and forms that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Bowling Green KY 42101, 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 Molding-Bowling Green-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 Kentucky 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 Bowling Green Kentucky 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 Method in Detail

This moulding system has been used since ancient times for creatingvseverl products. Egyptians for example, utilized rotomoulding techniques in the producing of ceramics. The Swiss were also using this rotation method to generate hollow chocolate eggs. Some plastic products in the USA were created using this method some time between 1940 and 1950. Due to the fact that it was considered to be a somewhat slow-moving method, the technique has however taken long to become popular

1. Mold preparation.
A fixed quantity of polymer in particle form is filled into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel substance. The coloration preferred for the final goods 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 type 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 secured and installed inside the oven.

2. The heat and fusion procedure.
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 mould. The rotation is done slowly, about 20 revolutions per min. Something that is vital at this moment is the amount of time the mould will spend inside the oven. If it overstays, the component will lose stability and strength, creating a poor product. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which produces bubbles in the completed product line.

3. Mould cooling.
When the component has sufficiently spent the correct amount of time in the oven, it is then taken out for cooling. This may 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 extraction from the mould. This is an additional measure that relies a lot on the right timing, since quick cooling decreases the material too quick, causing bending of the item.

4. The offloading or de-moulding phase.
As soon as the material inside te mould has cooled adequately, the molder handling the operation can then remove the finalized item from the mould. The procedure is repeated from the start, giving a series of similar products.

For more information on the different rotational molding options offered for the Bowling Green KY 42101 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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