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rotational molding-Newton-Rotational moulding refers to a plastic production solution that produces hollow stress-free items. The procedure utilizes high temperatures and bi axial rotation to follow up with seamless, one piece objects that have various forms, sizes and colors. This procedure is also referred to as rotomolding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The feature that makes this unique from other plastic manufacturing techniques that no pressure is involved. It also has few contenders when it involves the manufacture of large size hollow products which are long-lasting and inexpensive.There is a variety of items that are produced by this process including large size water tanks, automobile products, sophisticated shaped medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is because of the flexibility in regards to type 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 Newton KS 67114, 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 Molding-Newton-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 Kansas 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 Newton Kansas 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 Process Components

This moulding method has been used since earlier times for creatingvseverl product lines. Egyptians as an example, employed rotational molding procedures in the producing of ceramics. The Swiss were also working with this rotation method to create hollow chocolate eggs. Some plastic items in the USA were made utilizing this method some time between 1940 and 1950. Considering that it was considered to be a rather slow-moving technique, the process has however taken long to become popular

1. Mould preparation.
A predetermined volume of polymer in powder form is loaded into a hollow mould. The mold is usually constructed from cast aluminium or sheet steel material. The color wanted for the finished goods 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 production.

Pre-heating of the oven starts, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then locked and positioned into 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 coats the inside if the mold. The rotation is done gradually, about 20 spins per minute. The main thing that is crucial at this moment is the period of time the mould will spend inside the oven. If it stays to long, the material will lose value and durability, creating a poor item. If it is extracted from the oven prematurely, the polymer will not have liquefied properly, which generates bubbles in the finalized product line.

3. Mould cooling down.
When the component has sufficiently spent the correct amount of time in the oven, it is then extracted for cooling. This can be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it reduces somewhat for ease of extraction from the mould. This is yet another measure that relies a lot on the right timing, since rapid cooling decreases the material too quick, causing warping of the material.

4. The unloading or de-moulding step.
As soon as the product within te mold has cooled properly, the person handling the process can then extract the finished product from the mold. The procedure is repeated from the beginning, making a number of similar product lines.

For more information on the different rotational rotomolding options offered for the Newton KS 67114 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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