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

rotational molding-Medford-Rotational molding pertains to a plastic production method that makes hollow stress-free products. The function depends on high temperatures and bi axial rotation to come up with seamless, one piece items that have a variety of designs, colors and sizes. This method is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The component that makes this unique from other plastic manufacturing methods in that no pressure is needed. It also has few contenders when it pertains to the manufacture of sizable hollow products which are long-lasting and inexpensive.There is a wide variety of product lines that are produced by this process including large water tanks, automobile items, sophisticated molded medical products, leisure equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in terms of design 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 Medford MN 55049, 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

Plastic Manufacturing-Medford-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 Medford 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 Process in Detail

This molding method has been used since ancient times for creatingvseverl items. Egyptians for example, used rotational molding solutions in the creating of ceramics. The Swiss were also applying this rotation technique to make hollow chocolate eggs. Some plastic products in the USA were created utilizing this technique some time between 1940 and 1950. Considering that it was regarded to be a very slow system, the procedure has however taken long to become popular

1. Mould preparation.
A fixed volume of polymer in powder form is filled into a hollow mould. The mold is usually made from cast aluminium or sheet steel substance. 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 type of plastic manufacturing.

Pre-heating of the oven follows, 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 sealed and placed within the oven.

2. The heating and fusion procedure.
Once within the oven, the mould is turned on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The rotation is done gradually, about 20 rotations per minute. Something that is critical at this point is the period of time the mould will spend inside the oven. If it stays to long, the product will lose stability and durability, generating a poor item. If it is extracted from the oven prematurely, the polymer will not have liquefied properly, which produces bubbles in the completed product line.

3. Mould cooling.
When the material has completely 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 creates a cool mist. When the material cools, it reduces somewhat for ease of removal from the mould. This is another procedure that depends a lot on the correct timing, since rapid cooling decreases the material too quickly, causing warping of the item.

4. The un-loading or de-moulding step.
When the component within te mold has cooled correctly, the person managing the operation can then remove the finalized product from the mould. The procedure is repeated from the beginning, supplying a series of exact items.

For more information on the different rotational rotomolding options offered for the Medford MN 55049 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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