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

rotocasting-Alpena-Rotational molding pertains to a plastic manufacturing solution that creates hollow stress-free items. The process uses high temperatures and bi axial rotation to follow up with seamless, one piece products that have a variety of shapes, colors and sizes. This method is also known as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing procedures in that no pressure is required. It also has few contenders when it involves the manufacture of large hollow items which are resilient and inexpensive.There is a wide range of products that are created by this process including large water tanks, automobile products, sophisticated shaped medical products, recreation equipment, toys, kayaks, industrialized equipment among many others.This is because of the versatility in regards to type and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Alpena MI 49707, 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 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

Custom Molding-Alpena-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 Michigan 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 Alpena Michigan 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 system has been used since ancient times for creatingvseverl products. Egyptians for example, used rotomoulding solutions in the manufacturing of ceramics. The Swiss were also using this rotation method to create hollow chocolate eggs. Some plastic items in the USA were manufactured utilizing this technique some time between 1940 and 1950. The procedure has however taken long to catch on because it was considered as being a somewhat slow-moving process

1. Mold readying.
A predetermined amount of polymer in powder form is packed into a hollow mould. The mould is usually crafted from cast aluminium or sheet steel component. The colour intended for the finished item is pre compounded into the polymer. The most typically used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this design of plastic assembly.

Pre-heating of the oven follows, and it may 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 secured and installed inside the oven.

2. The heating and fusion process.
Once within the oven, the mould is spun on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The spinning is done gradually, about 20 spins per sixty seconds. The main thing that is critical at this moment is the amount of time the mould will spend within the oven. If it stays to long, the material will lose value and strength, making a poor product. If it is taken out from the oven prematurely, the polymer will not have melted properly, which produces bubbles in the completed product.

3. Mold cooling.
When the material has completely spent the right amount 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 a cool mist. When the component cools, it reduces slightly for ease of extraction from the mold. This is one more step that depends upon a lot on the ideal timing, since rapid cooling reduces the material too rapidly, causing bending of the material.

4. The un-loading or de-molding phase.
As soon as the material within te mould has cooled correctly, the person handling the procedure can then extract the finished item from the mold. The technique is repeated from the beginning, giving a number of identical product lines.

For more information on the different rotational molding options offered for the Alpena MI 49707, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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