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

rotational molding-Greencastle-Rotational moulding refers to a plastic manufacturing solution that makes hollow stress-free product lines. The method relies upon high temperatures and bi axial rotation to follow up with seamless, one piece products that have varying designs, sizes and colors. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The feature that makes this different from other plastic manufacturing procedures because no pressure is needed. It also has few rivals when it comes down to the creation of large hollow products which are durable and inexpensive.There is a variety of items that are developed by this process including big water tanks, automobile materials, intricate shaped medical items, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of type and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Greencastle PA 17225, 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-Greencastle-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 Greencastle 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 products. Egyptians as an example, used rotomoulding solutions in the making of ceramics. The Swiss were also applying this rotation design to make hollow chocolate eggs. Some plastic items in the USA were developed using this technique some time between 1940 and 1950. Given that it was considered to be a fairly slow-moving method, the approach has however taken long to catch on

1. Mould fitting.
A fixed volume of polymer in grain form is packed into a hollow mold. The mould is usually comprised of cast aluminium or sheet steel material. The coloration chosen 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 type of plastic assembly.

Preheating of the oven starts, 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 installed into the oven.

2. The heat and fusion phase.
Once within the oven, the mould is revolved on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mould. The turning is done slowly and gradually, about 20 rotations per minute. One thing that is critical at this moment is the amount of time the mold will spend inside the oven. If it overstays, the component will lose stability and durability, making a poor product. If it is removed from the oven prematurely, the polymer will not have liquefied correctly, which develops bubbles in the completed item.

3. Mold cooling.
When the material has sufficiently spent the right amount of time in the oven, it is then extracted 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 reduces slightly for ease of extraction from the mould. This is yet another step that depends a lot on the correct timing, since rapid cooling reduces the material too quick, causing warping of the product.

4. The discharging or de-molding step.
Once the material within te mould has cooled effectively, the molder managing the process can then remove the finished item from the mould. The procedure is repeated from the beginning, giving a series of similar product lines.

For more information on the different rotational molding options offered for the Greencastle PA 17225 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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