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

roto-molding-Sparta-Rotational molding refers to a plastic production procedure 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 a variety of designs, colors and sizes. This method is also called rotomolding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The attribute that makes this different from other plastic manufacturing methods in that no pressure is called for. It also has few competitors when it involves the production of sizable hollow products which are resilient and inexpensive.There is a variety of products that are developed by this process including large water tanks, automobile products, complex shaped medical products, leisure equipment, toys, canoes, industrialized equipment among many others.This is because of the flexibility in regards to type 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 Sparta WI 54656, 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 rotomolding 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-Sparta-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 Wisconsin 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 Sparta Wisconsin 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 Process in Detail

This moulding system has been used since earlier times for creatingvseverl product lines. Egyptians for instance, used rotocasting procedures in the making of ceramics. The Swiss were also applying this rotation approach to generate hollow chocolate eggs. Some plastic products in the USA were created utilizing this approach some time between 1940 and 1950. The technique has however taken very long to catch on because it was thought of to be a relatively slow-moving process

1. Mold preparation.
A predetermined measure of polymer in powder form is packed into a hollow mould. The mold is usually made of cast aluminium or sheet steel material. The coloring chosen for the end item is pre compounded into the polymer. The most commonly 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 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 inserted inside the oven.

2. The heating and fusion procedure.
Once placed into the oven, the mould is spun on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The spinning is done gradually, about 20 revolutions per minute. The main thing that is essential at this moment is the period of time the mold will spend inside the oven. If it stays to long, the product will lose value and durability, creating a poor item. If it is removed from the oven prematurely, the polymer will not have liquefied correctly, which produces bubbles in the completed item.

3. Mould cooling.
When the product has completely spent the enough 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 product cools, it reduces slightly for ease of removal from the mold. This is one more step that depends a lot on the correct timing, since rapid cooling shrinks the material too fast, causing bending of the material.

4. The unloading or de-moulding phase.
When the material within te mold has cooled successfully, the molder taking care of the operation can then extract the completed item from the mold. The procedure is repeated from the start, making a number of identical items.

For more information on the different rotational molding options offered for the Sparta WI 54656 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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