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

rotational molding-Van Dyne-Rotational molding refers to a plastic production method that generates hollow stress-free product lines. The function depends on high temperatures and bi axial rotation to follow up with seamless, one piece items that have a wide range of shapes, colors and sizes. This technique is also referred to as roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing methods that no pressure is called for. It also has few contenders when it involves the production of large hollow products which are long lasting and inexpensive.There is a variety of items that are created by this process including big water tanks, automobile materials, intricate molded medical products, leisure equipment, toys, canoes, industrial equipment among many others.This is due to the flexibility in terms of design and shapes that the process develops

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Van Dyne WI 54979, 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

Custom Molded-Van Dyne-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 Van Dyne 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 Rotomolding Process in Detail

This molding process has been used since ancient times for creatingvseverl items. Egyptians for example, applied rotomoulding techniques in the manufacturing of ceramics. The Swiss were also making use of this rotation technique to make hollow chocolate eggs. Some plastic products in the USA were developed utilizing this approach some time between 1940 and 1950. Given that it was regarded to be a relatively slow procedure, the approach has however taken long to become popular

1. Mold readying.
A predetermined quantity of polymer in powder form is filled into a hollow mold. The mould is usually composeded of cast aluminium or sheet steel material. The coloration preferred for the final goods 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 manufacturing.

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 installed within the oven.

2. The heat and fusion step.
Once within the oven, the mould is turned on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The turning is done slowly and gradually, about 20 spins per sixty seconds. One thing that is vital at this point 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 item. If it is taken out from the oven prematurely, the polymer will not have liquefied properly, which generates bubbles in the completed product line.

3. Mould cooling down.
When the material has sufficiently spent the correct 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 product cools, it shrinks slightly for ease of removal from the mold. This is yet another measure that depends a lot on the correct timing, since rapid cooling decreases the material too fast, causing bending of the material.

4. The un-loading or de-moulding step.
As soon as the material inside te mold has cooled correctly, the molder handling the operation can then extract the finalized item from the mould. The procedure is repeated from the beginning, giving a series of identical items.

For more information on the different rotational molding options offered for the Van Dyne WI 54979 area, please call our toll free number  866-971-7861 or fill out the form on the right for a consultation!

Other areas we service, go here to custom molded

Local Resources

Production Example
Google Map