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

roto-molding-Stewart-Rotational molding refers to a plastic production procedure that generates hollow stress-free items. The procedure relies on high temperatures and bi axial rotation to come up with seamless, one piece objects that have various shapes, 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 benefit that makes this different from other plastic manufacturing procedures that no pressure is needed. It also has few rivals when it involves the creation of sizable hollow items which are durable and inexpensive.There is a wide range of products that are created by this process including large size water tanks, automobile products, sophisticated designed medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in regards to 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 Stewart MN 55385, 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

Custom Molded-Stewart-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 Stewart 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 Rotomoulding Procedure in Detail

This molding operation has been used since early times for creatingvseverl products. Egyptians for example, worked with rotomoulding techniques in the of ceramics. The Swiss were also employing this rotation technique to generate hollow chocolate eggs. Some plastic products in the USA were made utilizing this approach some time between 1940 and 1950. Given that it was viewed to be a fairly slow-moving procedure, the approach has however taken long to become popular

1. Mold preparation.
A fixed amount of polymer in particle form is packed into a hollow mould. The mold is usually crafted from cast aluminium or sheet steel material. The color chosen for the final product 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 engineering.

Pre-heating of the oven starts, and it can be done by either conduction, convection or sometimes radiation. It is heated 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 placed into the oven, the mold is turned on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The spinning is done gradually, about 20 rotations per min. One thing that is important at this moment is the amount of time the mould will spend inside the oven. If it stays to long, the product will lose value and strength, generating a faulty product. If it is taken out from the oven prematurely, the polymer will not have melted properly, which produces bubbles in the completed item.

3. Mould cooling.
When the product has completely spent the right 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 a cool mist. When the component cools, it shrinks slightly for ease of removal from the mould. This is one more step that depends a lot on the correct timing, since quick cooling decreases the material too quick, causing bending of the item.

4. The un-loading or de-molding step.
When the product inside te mold has cooled successfully, the molder taking care of the operation can then remove the completed item from the mould. The procedure is repeated from the beginning, providing a number of identical products.

For more information on the different rotational rotomolding options offered for the Stewart MN 55385 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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