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

rotocasting-Wells-Rotational moulding pertains to a plastic production technique that generates hollow stress-free products. The procedure relies on high temperatures and bi axial rotation to come up with seamless, one piece items that have many different designs, colors and sizes. This technique is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The feature that makes this different from other plastic manufacturing processes in that no pressure is called for. It also has few contenders when it comes down to the manufacture of large hollow products which are long lasting and inexpensive.There is a wide variety of product lines that are created by this process including large size water tanks, automobile products, complex designed medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in terms of type and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Wells MN 56097, 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 rotocasting 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 Products-Wells-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 Minnesota 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 Wells Minnesota 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 Method in Detail

This molding method has been used since earlier times for creatingvseverl products. Egyptians for example, utilized rotocasting methods in the manufacturing of ceramics. The Swiss were also using this rotation type to create hollow chocolate eggs. Some plastic items in the USA were created using this approach some time between 1940 and 1950. The process has however taken very long to catch on because it was thought of to be a rather slow process

1. Mould fitting.
A fixed amount of polymer in grain form is loaded into a hollow mould. The mold is usually made of cast aluminium or sheet steel component. The color chosen for the final item 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 style of plastic manufacturing.

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 installed into the oven.

2. The heat and fusion step.
Once inside the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mould. The rotation is done slowly and gradually, about 20 rotations per sixty seconds. One thing that is essential at this moment is the period of time the mould will spend within the oven. If it stays to long, the product will lose stability and strength, creating a faulty product. If it is taken out from the oven too early, the polymer will not have liquefied correctly, which generates bubbles in the finished item.

3. Mould cooling down.
When the material 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 creates a cool mist. When the material cools, it reduces somewhat for ease of extraction from the mould. This is yet another measure that relies a lot on the correct timing, since quick cooling decreases the material too quickly, causing bending of the material.

4. The unloading or de-moulding phase.
When the component inside te mould has cooled successfully, the person taking care of the operation can then take out the completed item from the mould. The technique is repeated from the beginning, giving a number of similar product lines.

For more information on the different rotational rotomolding options offered for the Wells MN 56097 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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