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

roto-molding-Marion-Rotational moulding pertains to a plastic manufacturing practice that produces hollow stress-free products. The process utilizes high temperatures and bi axial rotation to come up with seamless, one piece objects that have varying designs, colors and sizes. This technique is also referred to as rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The attribute that makes this unique from other plastic manufacturing techniques in that no pressure is involved. It also has few rivals when it comes to the production of large size hollow items which are durable and inexpensive.There is a variety of items that are generated by this process including big water tanks, automobile items, intricate shaped medical products, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of style and forms that the process creates

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Marion SD 57043, 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 roto-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

Plastic Molding-Marion-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 South Dakota 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 Marion South Dakota 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 Procedure in Detail

This molding method has been used since ancient times for creatingvseverl product lines. Egyptians for instance, applied rotational molding systems in the making of ceramics. The Swiss were also using this rotation technique to create hollow chocolate eggs. Some plastic products in the USA were created using this approach some time between 1940 and 1950. Because it was viewed to be a somewhat slow process, the procedure has however taken long to catch on

1. Mold fitting.
A fixed amount of polymer in particle form is packed into a hollow mold. The mold is usually crafted from cast aluminium or sheet steel material. The color tone chosen for the end 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 format of plastic engineering.

Pre-heating 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 mould with the powdered polymer is then locked and inserted into the oven.

2. The heat and fusion step.
Once within the oven, the mold is rotated on two axis so the powdered polymer liquefies from the heat and layers the inside if the mould. The spinning is done slowly and gradually, about 20 spins per sixty seconds. Something that is critical at this moment is the period of time the mold will spend inside the oven. If it overstays, the product will lose value and durability, creating a weak item. If it is extracted from the oven prematurely, the polymer will not have melted properly, which develops bubbles in the finished product.

3. Mold cooling.
When the product has sufficiently spent the enough 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 creates a cool mist. When the material cools, it shrinks somewhat for ease of extraction from the mould. This is an additional measure that depends a lot on the right timing, since rapid cooling shrinks the material too quick, causing bending of the product.

4. The offloading or de-molding step.
Once the material inside te mould has cooled effectively, the molder managing the process can then take out the finalized item from the mold. The technique is repeated from the beginning, supplying a number of exact products.

For more information on the different rotational rotomolding options offered for the Marion SD 57043 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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