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

rotocasting-Macungie-Rotational moulding refers to a plastic manufacturing technique that creates hollow stress-free products. The method relies on high temperatures and bi axial rotation to follow up with seamless, one piece items that have a wide range of shapes, colors and sizes. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The feature that makes this different from other plastic manufacturing methods that no pressure is called for. It also has few contenders when it involves the manufacture of large hollow products which are long-lasting and inexpensive.There is a wide range of products that are created by this process including big water tanks, automobile items, sophisticated shaped medical products, recreation equipment, toys, canoes, industrialized equipment among many others.This is because of the flexibility in terms of type and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Macungie PA 18062, 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 rotomolding 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-Macungie-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 Macungie 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 Rotomoulding Process Components

This molding method has been used since earlier times for creatingvseverl product lines. Egyptians for example, used rotomoulding systems in the producing of ceramics. The Swiss were also working with this rotation design to generate hollow chocolate eggs. Some plastic products in the USA were created using this procedure some time between 1940 and 1950. The procedure has however taken long to take affect because it was thought of as being a very slow-moving process

1. Mold readying.
A predetermined measure of polymer in grain form is filled into a hollow mould. The mould is usually built from cast aluminium or sheet steel material. The color tone wanted for the final product is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic production.

Preheating of the oven follows, and it can be done by either conduction, convection or sometimes radiation. It is heated to temperatures between 500-700F. The mold with the powdered polymer is then locked and positioned inside the oven.

2. The heat and fusion phase.
Once inside the oven, the mold is revolved on two axis so the powdered polymer melts from the heat and layers the inside if the mold. The spinning is done slowly and gradually, about 20 rotations per minute. One thing that is crucial at this moment is the amount of time the mold will spend within the oven. If it overstays, the component will lose value and strength, making a weak product. If it is removed from the oven prematurely, the polymer will not have flowed correctly, which develops bubbles in the finalized item.

3. Mold cooling down.
When the component has completely 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 generates a cool mist. When the product cools, it reduces slightly for ease of removal from the mold. This is yet another procedure that depends upon a lot on the ideal timing, since quick cooling shrinks the material too quickly, causing bending of the material.

4. The discharging or de-molding step.
When the material within te mold has cooled successfully, the molder managing the procedure can then take out the finalized product from the mold. The procedure is repeated from the start, giving a number of similar items.

For more information on the different rotational molding options offered for the Macungie PA 18062 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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