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

rotational molding-Willis-Rotational molding pertains to a plastic manufacturing method that creates hollow stress-free items. The method uses high temperatures and bi axial rotation to come up with seamless, one piece products that have several shapes, colors and sizes. This technique is also known as rotomoulding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing procedures in that no pressure is required. It also has few competitors when it involves the manufacture of large size hollow products which are long lasting and inexpensive.There is a wide range of products that are created by this process including large water tanks, automobile materials, intricate shaped medical items, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility in regards to style and shapes that the process produces

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Willis TX 77318, 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-Willis-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 Willis 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 Rotomoulding Procedure in Detail

This moulding procedure has been used since earlier times for creatingvseverl products. Egyptians for example, employed rotocasting techniques in the manufacturing of ceramics. The Swiss were also working with this rotation type to generate hollow chocolate eggs. Some plastic items in the USA were made using this procedure some time between 1940 and 1950. The technique has however taken very long to catch on because it was thought of as being a somewhat slow-moving process

1. Mould readying.
A predetermined amount of polymer in grain form is loaded into a hollow mold. The mold is usually composeded of cast aluminium or sheet steel component. The colour chosen for the finished goods is pre compounded into the polymer. The most often used powder resin is polythene, but polyvinyl chloride and nylon can also be used in this style of plastic assembly.

Pre-heating of the oven follows, and it can 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 sealed and put into the oven.

2. The heating up and fusion procedure.
Once placed into the oven, the mold is rotated on two axis so the powdered polymer liquefies from the heat and coats the inside if the mold. The rotation is done gradually, about 20 spins per min. The main thing that is critical at this moment is the period of time the mould will spend within the oven. If it stays to long, the product will lose value and strength, generating a faulty item. If it is extracted from the oven prematurely, the polymer will not have liquefied correctly, which creates bubbles in the finalized product.

3. Mold cooling down.
When the material has sufficiently spent the right 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 reduces a little for ease of extraction from the mould. This is yet another procedure that depends upon a lot on the right timing, since quick cooling decreases the material too quickly, causing bending of the item.

4. The discharging or de-molding step.
Once the component inside te mould has cooled properly, the person taking care of the process can then remove the completed item from the mould. The function is repeated from the start, making a series of exact product lines.

For more information on the different rotational rotomolding options offered for the Willis TX 77318 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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