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

rotomoulding-Melrose-Rotational molding refers to a plastic production method that creates hollow stress-free products. The technique uses high temperatures and bi axial rotation to follow up with seamless, one piece products that have many different shapes, colors and sizes. This technique is also called roto-molding or rotocasting. Sometimes the term slush moulding is used for certain liquid vinyl styles.

The attribute that makes this unique from other plastic manufacturing processes that no pressure is involved. It also has few contenders when it comes down to the manufacture of large size hollow products which are durable and inexpensive.There is a wide range of items that are created by this process including big water tanks, automobile materials, sophisticated shaped medical items, recreation equipment, toys, kayaks, commercial equipment among many others.This is due to the flexibility in regards to type and shapes that the process manufactures

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Melrose MA 2176, 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 rotomolding 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-Melrose-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 Massachusetts 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 Melrose Massachusetts 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 Procedure Components

This molding procedure has been used since earlier times for creatingvseverl items. Egyptians for example, utilized rotational molding methods in the making of ceramics. The Swiss were also utilizing this rotation method to make hollow chocolate eggs. Some plastic product lines in the USA were manufactured using this technique some time between 1940 and 1950. Due to the fact that it was thought of to be a fairly slow method, the procedure has however taken long to catch on

1. Mould preparation.
A fixed quantity of polymer in powder form is filled into a hollow mold. The mold is usually crafted from cast aluminium or sheet steel component. The color tone needed 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 type of plastic assembly.

Pre-heating of the oven starts, and it can 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 inserted into the oven.

2. The heating up and fusion procedure.
Once inside the oven, the mold 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 sixty seconds. One thing that is vital at this moment is the amount of time the mould will spend inside the oven. If it overstays, the component will lose stability and durability, generating a faulty product. If it is removed from the oven too early, the polymer will not have liquefied properly, which creates bubbles in the finished item.

3. Mold cooling down.
When the product has completely spent the right amount of time in the oven, it is then taken out for cooling. This may be done by air or water, or sometimes a mixture of both which creates a cool mist. When the material cools, it reduces slightly for ease of extraction from the mould. This is an additional procedure that depends upon a lot on the correct timing, since rapid cooling decreases the material too quickly, causing bending of the product.

4. The un-loading or de-moulding step.
As soon as the component inside te mould has cooled correctly, the molder handling the operation can then extract the completed product from the mold. The process is repeated from the start, providing a series of identical products.

For more information on the different rotational rotomolding options offered for the Melrose MA 2176 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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