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

roto-molding-Eitzen-Rotational molding refers to a plastic manufacturing technique that generates hollow stress-free product lines. The method uses high temperatures and bi axial rotation to come up with seamless, one piece items that have a variety of shapes, sizes and colors. This method is also referred to as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The benefit that makes this different from other plastic manufacturing processes 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 items that are produced by this process including large water tanks, automobile products, intricate molded medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is because of the flexibility in terms of type and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Eitzen MN 55931, 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 Manufacturing-Eitzen-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 Eitzen 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 Components

This molding operation has been used since ancient times for creatingvseverl products. Egyptians for instance, employed roto-molding methods in the making of ceramics. The Swiss were also making use of this rotation method to create hollow chocolate eggs. Some plastic products in the USA were made using this method some time between 1940 and 1950. Considering that it was looked at to be a rather slow process, the system has however taken long to become popular

1. Mold readying.
A fixed measure of polymer in grain form is loaded into a hollow mold. The mold is usually comprised of cast aluminium or sheet steel material. The color tone chosen for the final product is pre compounded into the polymer. The most generally used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this type of plastic production.

Pre-heating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then locked and installed inside the oven.

2. The heating up and fusion phase.
Once within the oven, the mould is revolved on two axis so the powdered polymer melts from the heat and coats the inside if the mold. The turning is done slowly and gradually, about 20 rotations per minute. The main thing that is vital at this moment is the period of time the mould will spend inside the oven. If it stays to long, the material will lose value and durability, producing a faulty item. If it is extracted from the oven prematurely, the polymer will not have liquefied correctly, which produces bubbles in the finished product line.

3. Mold cooling.
When the product has completely spent the correct amount 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 generates a cool mist. When the material cools, it reduces somewhat for ease of extraction from the mold. This is one more measure that depends a lot on the correct timing, since quick cooling decreases the material too quickly, causing bending of the material.

4. The removing or de-moulding phase.
As soon as the material within te mold has cooled effectively, the person managing the process can then take out the finished product from the mould. The process is repeated from the start, providing a series of identical product lines.

For more information on the different rotational rotomolding options offered for the Eitzen MN 55931 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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