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

rotational molding-Bloomington-Rotational molding pertains to a plastic manufacturing method that generates hollow stress-free product lines. The procedure depends on high temperatures and bi axial rotation to come up with seamless, one piece products that have a variety of shapes, sizes and colors. This method is also called roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl forms.

The benefit that makes this unique from other plastic manufacturing procedures in that no pressure is needed. It also has few competitors when it comes to the production of sizable hollow products which are long-lasting and inexpensive.There is a wide variety of products that are developed by this process including large water tanks, automobile items, complex molded medical products, leisure equipment, toys, canoes, industrialized equipment among many others.This is because of the versatility in regards to style and forms that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Bloomington TX 77951, 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 rotomoulding 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-Bloomington-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 Texas 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 Bloomington Texas 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 Method in Detail

This molding procedure has been used since early times for creatingvseverl product lines. Egyptians for instance, employed rotomoulding procedures in the producing of ceramics. The Swiss were also employing this rotation design to make hollow chocolate eggs. Some plastic items in the USA were manufactured utilizing this procedure some time between 1940 and 1950. The technique has however taken very long to take affect because it was looked at as being a rather slow process

1. Mould preparation.
A predetermined amount of polymer in particle form is loaded into a hollow mould. The mould is usually composeded of cast aluminium or sheet steel material. The colour intended for the final product 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 assembly.

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 mold with the powdered polymer is then secured and put into the oven.

2. The heat and fusion process.
Once inside the oven, the mold is turned on two axis so the powdered polymer melts from the heat and layers the inside if the mould. The rotation is done gradually, about 20 spins per min. One thing that is important at this moment is the amount of time the mold will spend within the oven. If it overstays, the material will lose value and strength, creating a poor product. If it is removed from the oven prematurely, the polymer will not have melted correctly, which develops bubbles in the finished product.

3. Mould cooling down.
When the material has completely spent the correct amount 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 generates a cool mist. When the product cools, it shrinks somewhat for ease of extraction from the mould. This is yet another step that depends a lot on the correct timing, since rapid cooling reduces the material too rapidly, causing bending of the product.

4. The unloading or de-moulding phase.
When the material within te mould has cooled properly, the molder taking care of the operation can then take out the finalized item from the mould. The technique is repeated from the start, giving a series of similar items.

For more information on the different rotational rotomolding options offered for the Bloomington TX 77951 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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