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

rotomolding-Sidman-Rotational molding pertains to a plastic manufacturing method that makes hollow stress-free items. The technique utilizes high temperatures and bi axial rotation to follow up with seamless, one piece objects that have a wide range of designs, sizes and colors. This method is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

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

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Sidman PA 15955, 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 moulding 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-Sidman-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 Sidman 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 Rotomolding Process in Detail

This moulding process has been used since ancient times for creatingvseverl products. Egyptians as an example, employed rotocasting systems in the creating of ceramics. The Swiss were also working with this rotation technique to generate hollow chocolate eggs. Some plastic product lines in the USA were made utilizing this method some time between 1940 and 1950. The technique has however taken long to take affect because it was thought of to be a very slow process

1. Mould fitting.
A predetermined quantity of polymer in grain form is filled into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel material. The coloration wanted for the finished product 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 design of plastic production.

Preheating of the oven starts, and it can 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 locked and put within the oven.

2. The heat and fusion step.
Once inside the oven, the mold is revolved on two axis so the powdered polymer melts from the heat and overlays the inside if the mould. The spinning is done slowly, about 20 spins per minute. The main thing that is important at this moment is the amount of time the mould will spend inside the oven. If it stays to long, the material will lose value and strength, making a poor product. If it is taken out from the oven too early, the polymer will not have melted properly, which creates bubbles in the finished product line.

3. Mould cooling down.
When the material has sufficiently spent the enough of time in the oven, it is then removed for cooling. This can be done by air or water, or sometimes a mixture of both which generates a cool mist. When the product cools, it shrinks a little for ease of removal from the mold. This is one more step that relies a lot on the right timing, since rapid cooling decreases the material too quick, causing warping of the product.

4. The removing or de-molding step.
As soon as the material within te mold has cooled adequately, the molder taking care of the process can then extract the completed product from the mold. The technique is repeated from the beginning, providing a series of exact items.

For more information on the different rotational molding options offered for the Sidman PA 15955 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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