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

rotocasting-Harsens Island-Rotational molding refers to a plastic manufacturing method that makes hollow stress-free product lines. The process depends on high temperatures and bi axial rotation to come up with seamless, one piece objects that have varying designs, colors and sizes. This technique is also called rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The attribute that makes this unique from other plastic manufacturing processes in that no pressure is involved. It also has few rivals when it pertains to the manufacture of large size hollow products which are long lasting and inexpensive.There is a wide range of product lines that are generated by this process including large water tanks, automobile materials, sophisticated designed medical products, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the versatility in terms of design and forms that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Harsens Island MI 48028, 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

Plastic Products-Harsens Island-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 Harsens Island 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 Rotomoulding Procedure in Detail

This molding system has been used since ancient times for creatingvseverl products. Egyptians as an example, worked with rotational molding solutions in the making of ceramics. The Swiss were also utilizing this rotation approach to create hollow chocolate eggs. Some plastic product lines in the USA were developed utilizing this method some time between 1940 and 1950. Given that it was considered to be a somewhat slow-moving method, the approach has however taken long to catch on

1. Mould prep work.
A predetermined measure of polymer in powder form is loaded into a hollow mould. The mould is usually made from cast aluminium or sheet steel component. The coloring desired for the end 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 design of plastic production.

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 sealed and positioned into the oven.

2. The heating up and fusion procedure.
Once inside the oven, the mould is rotated on two axis so the powdered polymer liquefies from the heat and layers the inside if the mold. The spinning is done slowly and gradually, about 20 revolutions per min. Something that is vital at this point is the amount of time the mold will spend within the oven. If it overstays, the component will lose stability and durability, making a weak item. If it is extracted from the oven too early, the polymer will not have flowed correctly, which creates bubbles in the finished item.

3. Mould cooling down.
When the component has sufficiently spent the right amount of time in the oven, it is then extracted for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it shrinks somewhat for ease of extraction from the mold. This is an additional step that depends a lot on the correct timing, since rapid cooling decreases the material too fast, causing warping of the item.

4. The unloading or de-moulding phase.
Once the material within te mould has cooled effectively, the person handling the process can then take out the completed product from the mould. The function is repeated from the beginning, supplying a number of identical product lines.

For more information on the different rotational molding options offered for the Harsens Island MI 48028, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

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