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

rotational moulding-Eugene-Rotational molding pertains to a plastic manufacturing practice that creates hollow stress-free items. The procedure depends on high temperatures and bi axial rotation to follow up with seamless, one piece objects that have varying shapes, colors and sizes. This procedure is also called roto-molding or rotocasting. Sometimes the term slush molding is used for certain liquid vinyl styles.

The function that makes this unique from other plastic manufacturing processes in that no pressure is involved. It also has few rivals when it pertains to the creation of large hollow products which are durable and inexpensive.There is a variety of product lines that are generated by this process including large size water tanks, automobile items, sophisticated shaped medical products, recreation equipment, toys, canoes, commercial equipment among many others.This is due to the flexibility in terms of design and shapes that the process makes

Benefits of Using Rotomolding to Manufacture Plastic Products

  • Relatively low tooling costs.
    When compared to other plastic manufacturing processes in Eugene OR 97401, 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 moulding 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 Molding-Eugene-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 Oregon 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 Eugene Oregon 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 Components

This moulding procedure has been used since early times for creatingvseverl products. Egyptians as an example, utilized rotational molding solutions in the creating of ceramics. The Swiss were also working with this rotation design to make hollow chocolate eggs. Some plastic products in the USA were manufactured utilizing this technique some time between 1940 and 1950. The technique has however taken very long to catch on because it was considered to be a pretty slow-moving process

1. Mould readying.
A predetermined volume of polymer in powder form is filled into a hollow mould. The mould is usually constructed from cast aluminium or sheet steel component. The colour preferred 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 style of plastic assembly.

Pre-heating of the oven follows, and it may be done by either conduction, convection or sometimes radiation. It is heated up to temperatures between 500-700F. The mould with the powdered polymer is then locked and positioned within the oven.

2. The heat and fusion step.
Once inside the oven, the mold is revolved on two axis so the powdered polymer liquefies from the heat and overlays the inside if the mold. The rotation is done slowly and gradually, about 20 spins per minute. The main thing that is essential at this point is the amount of time the mold will spend within the oven. If it stays to long, the product will lose value and strength, generating a faulty product. If it is removed from the oven too early, the polymer will not have liquefied correctly, which produces bubbles in the finalized product line.

3. Mould cooling down.
When the product has completely spent the enough 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 generates a cool mist. When the material cools, it reduces somewhat for ease of extraction from the mold. This is one more measure that relies a lot on the right timing, since quick cooling decreases the material too quickly, causing bending of the material.

4. The un-loading or de-moulding phase.
As soon as the product within te mold has cooled properly, the person managing the procedure can then remove the finalized item from the mould. The process is repeated from the start, giving a series of identical items.

For more information on the different rotational rotomolding options offered for the Eugene OR 97401 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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