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

rotational moulding-Alamo-Rotational moulding pertains to a plastic manufacturing method that generates hollow stress-free products. The technique relies on high temperatures and bi axial rotation to come up with seamless, one piece items that have several shapes, colors and sizes. This technique is also called roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl types.

The feature that makes this different from other plastic manufacturing methods because no pressure is involved. It also has few rivals when it involves the manufacture of large size hollow products which are durable and inexpensive.There is a wide variety of product lines that are developed by this process including big water tanks, automobile items, intricate designed medical items, recreation equipment, toys, canoes, industrial equipment among many others.This is because of the versatility in regards to type and forms that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Alamo TN 38001, 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 rotational 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-Alamo-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 Tennessee 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 Alamo Tennessee 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 moulding process has been used since early times for creatingvseverl items. Egyptians as an example, applied roto-molding techniques in the of ceramics. The Swiss were also making use of this rotation method to create hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this technique some time between 1940 and 1950. The process has however taken long to take affect because it was looked at to be a moderately slow-moving process

1. Mold prep work.
A predetermined amount of polymer in powder form is filled into a hollow mold. The mould is usually made of cast aluminium or sheet steel material. The coloration intended 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 design of plastic manufacturing.

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 sealed and positioned into the oven.

2. The heating up and fusion phase.
Once inside the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and coats the inside if the mould. The spinning is done slowly and gradually, about 20 rotations per min. The main thing that is important at this point is the amount of time the mould will spend within the oven. If it overstays, the material will lose stability and strength, producing a weak item. If it is extracted from the oven too early, the polymer will not have liquefied properly, which develops bubbles in the finalized product line.

3. Mold cooling down.
When the product has completely 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 a cool mist. When the material cools, it shrinks a little for ease of removal from the mold. This is yet another measure that relies a lot on the ideal timing, since quick cooling shrinks the material too quick, causing warping of the item.

4. The offloading or de-molding step.
Once the product inside te mold has cooled correctly, the molder handling the operation can then take out the finalized product from the mould. The procedure is repeated from the start, giving a number of similar product lines.

For more information on the different rotational molding options offered for the Alamo TN 38001 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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