What You Need to Know When It Comes to Urethane Casting
The process of resin casting production for resin components made from urethane materials is known as urethane casting. This is the process which uses a temporary polymer mold produced from maters pattern or part. If it is fast prototyping that one needs to have then this process is needed. If you have a material that is not made for fast prototyping then you will need this process. A material of choice is what urethane will be during this process since it is cost effective. The material’s mechanical properties can also be matched by the urethane making it a perfect fit. The production parts of every manufacturer can also be duplicated with much precision once they will make use of urethane. Once you require drift angles and undercuts that it is also the urethane that you should be using since it is flexible in nature. When taking a look at the production of the casting then the molds will be made from RTV (room-temperature vulcanization) silicone.
If the prototyping is being done then that is also the time that urethane parts are created similar to that of the actual production parts. 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. If you will be considering these parts then they can also be utilized as a testing prototype. 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 whole process of urethane casting process starts with a prediction of a master pattern or part. This is where the mold and casting are to be created. Different methods like machining are needed in order for it to create these master patterns. When considering these master patterns that the most common way of making them 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. This process will help create a 3D component.
If it is the master pattern that has already been created then it will be suspended in a box or a frame with a gate assembly. By pouring the RTV silicone around the master pattern that it will be fully enclosed in silicone. The silicone will then 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. The urethane material is then to be poured into the silicone parts and will be allowed to harden. Once it as hardens then it can now be removed from the silicone mold. The silicone mold can now be reused for further production.