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

rotational moulding-Paoli-Rotational molding pertains to a plastic manufacturing practice that creates hollow stress-free product lines. The method relies upon high temperatures and bi axial rotation to come up with seamless, one piece items that have various designs, sizes and colors. This method is also known as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl forms.

The component that makes this unique from other plastic manufacturing procedures because no pressure is involved. It also has few competitors when it involves the manufacture 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 materials, complex molded medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is because of the flexibility in regards to type 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 Paoli PA 19301, 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-Paoli-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 Pennsylvania 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 Paoli Pennsylvania 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 Method in Detail

This molding process has been used since earlier times for creatingvseverl items. Egyptians as an example, utilized rotocasting systems in the creating of ceramics. The Swiss were also making use of this rotation format to create hollow chocolate eggs. Some plastic product lines in the USA were developed using this technique some time between 1940 and 1950. Considering that it was viewed to be a basically slow-moving method, the system has however taken long to catch on

1. Mold preparation.
A predetermined amount of polymer in grain form is packed into a hollow mould. The mold is usually made of cast aluminium or sheet steel component. The coloring intended for the end 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 style of plastic manufacturing.

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

2. The heating and fusion procedure.
Once inside the oven, the mold is rotated on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The rotation is done slowly and gradually, about 20 revolutions per minute. One thing that is crucial at this point is the period of time the mold will spend within the oven. If it stays to long, the material will lose stability and durability, creating a weak item. If it is taken out from the oven too early, the polymer will not have flowed properly, which develops bubbles in the completed item.

3. Mold cooling down.
When the product has completely 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 a cool mist. When the product cools, it reduces somewhat for ease of removal from the mould. This is yet another step that depends upon a lot on the correct timing, since rapid cooling decreases the material too quickly, causing bending of the product.

4. The discharging or de-molding phase.
When the material inside te mold has cooled adequately, the person handling the process can then take out the finalized product from the mould. The procedure is repeated from the start, making a series of similar products.

For more information on the different rotational molding options offered for the Paoli PA 19301 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to plastic molding

Local Resources

Production Example
Google Map