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

rotational moulding-Bristol-Rotational molding pertains to a plastic production technique that generates hollow stress-free product lines. The process uses high temperatures and bi axial rotation to follow up with seamless, one piece products that have different designs, sizes and colors. This procedure is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures in that no pressure is required. It also has few rivals when it involves the creation of sizable hollow items which are resilient and inexpensive.There is a wide variety of product lines that are produced by this process including large size water tanks, automobile materials, sophisticated designed medical products, recreation equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in terms of type and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Bristol PA 19007, 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 Molding-Bristol-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 Bristol 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 molding operation has been used since early times for creatingvseverl products. Egyptians for instance, utilized rotocasting solutions in the manufacturing of ceramics. The Swiss were also making use of this rotation technique to create hollow chocolate eggs. Some plastic product lines in the USA were made using this method some time between 1940 and 1950. Considering that it was regarded to be a relatively slow-moving process, the technique has however taken long to become popular

1. Mould prep work.
A predetermined measure of polymer in particle form is filled into a hollow mould. The mould is usually made of cast aluminium or sheet steel material. The color intended for the finished goods 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 design of plastic production.

Preheating 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 locked and placed inside the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mould is rotated on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The rotation is done slowly, about 20 spins per minute. Something that is vital at this moment is the amount of time the mold will spend inside the oven. If it overstays, the product will lose value and durability, making a faulty product. If it is removed from the oven prematurely, the polymer will not have liquefied properly, which generates bubbles in the finalized product line.

3. Mold cooling down.
When the product has sufficiently spent the right 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 creates a cool mist. When the material cools, it shrinks slightly for ease of extraction from the mould. This is one more measure that relies a lot on the right timing, since quick cooling decreases the material too rapidly, causing bending of the item.

4. The offloading or de-molding step.
Once the component within te mold has cooled correctly, the person managing the operation can then extract the finished product from the mould. The procedure is repeated from the start, giving a number of identical products.

For more information on the different rotational molding options offered for the Bristol PA 19007 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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