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rotomoulding-Jenison-Rotational moulding refers to a plastic production technique that makes hollow stress-free products. The technique relies upon high temperatures and bi axial rotation to follow up with seamless, one piece items that have many different designs, colors and sizes. This method is also known as rotomoulding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl types.

The attribute that makes this different from other plastic manufacturing processes because no pressure is called for. It also has few contenders when it involves the production of large size hollow products which are resilient and inexpensive.There is a wide variety of product lines that are produced by this process including big water tanks, automobile materials, complex molded medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the versatility in terms of design 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 Jenison MI 49428, 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 Products-Jenison-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 Jenison 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 Roto-Molding Method in Detail

This molding method has been used since ancient times for creatingvseverl products. Egyptians for example, applied roto-molding procedures in the of ceramics. The Swiss were also utilizing this rotation type to make hollow chocolate eggs. Some plastic items in the USA were created utilizing this method some time between 1940 and 1950. The procedure has however taken long to catch on because it was thought of as being a somewhat slow process

1. Mold prep work.
A fixed quantity of polymer in powder form is filled into a hollow mold. The mould is usually crafted from cast aluminium or sheet steel material. The color tone 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 style of plastic assembly.

Preheating 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 mold with the powdered polymer is then locked and installed within the oven.

2. The heat and fusion phase.
Once inside the oven, the mould is spun on two axis so the powdered polymer melts from the heat and overlays the inside if the mould. The rotation is done slowly, about 20 spins per minute. Something that is crucial at this moment is the period of time the mold will spend within the oven. If it overstays, the product will lose value and strength, making a poor product. If it is extracted from the oven prematurely, the polymer will not have flowed correctly, which generates bubbles in the completed product.

3. Mould cooling.
When the material has sufficiently spent the correct amount of time in the oven, it is then taken out for cooling. This can be done by air or water, or sometimes a mixture of both which a cool mist. When the material cools, it shrinks somewhat for ease of extraction from the mold. This is one more measure that depends a lot on the ideal timing, since rapid cooling decreases the material too quick, causing bending of the product.

4. The un-loading or de-moulding step.
As soon as the product inside te mould has cooled properly, the person managing the operation can then extract the finalized item from the mould. The process is repeated from the beginning, providing a number of similar products.

For more information on the different rotational molding options offered for the Jenison MI 49428, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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