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August 2, 2018 Off By Mary onielo

What You Need to Understand About Urethane Casting

When you are opting for a resin casting production process which will be used for casting components made from urethane materials then that is known as a urethane casting. A temporary polymer mold produced from a master pattern or part is what this is all about. It is this one that is used in order to have fast prototyping. It is this process that one needs to be having especially if the actual material that they will be needing is not made for fast prototyping. A cost-effective material is what you will get with urethane and that is the reason why it is the material of choice. They can also match the material’s mechanical properties. There is also a chance for manufacturers to duplicate their production parts in a more precise manner. Once you require drift angles and undercuts that it is also the urethane that you should be using since it is flexible in nature. It is the RTV (room temperature vulcanization) silicone where the molds are made for production of casting.

It is the production of urethane parts that is similar to the actual production parts that are being done whenever the prototyping process is being made. Making several parts of the components that they will be needing is what they are able to do in the process. There are many different uses for these parts like sales and marketing. When taking a look at these parts that they can also be used as an early sample for clients. It is also used as a testing prototype when looking at these parts. It is important to note that these materials should not be used as a substitute for the actual material. This what you need to take note of especially if you are using it for failure mode testing and life testing of components.

The production of a master pattern or part is the very first step in the urethane casting process. Creating the mold and master pattern will come from this one. Different methods like machining are needed in order for it to create these master patterns. Ther is also a common method in making these master pattern and that is through stereolithography (SLA). The use of UV-curable photopolymer resin in combination with a UV laser is what is needed in order to do this one. Whenever this process is done then you can create a 3D component.

Suspended in a box or a frame with a gate assembly is what is done whenever the master pattern has already been created. It is the pattern that will be completely enclosed in silicone once the RTV silicone is poured around it. It is now the silicone that will be allowed to cure. Once the material fully hardens then there will be cuts that will be made to remove to form the master pattern. Once this is all done then the urethane is then poured into the silicone and is allowed to harden. Once it as hardens then it can now be removed from the silicone mold. If you need more production then the silicone mold can still be reused.

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