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. This is the process which uses a temporary polymer mold produced from maters pattern or part. It is this process that is needed in order to provide a fast prototyping. This is important if the actual materials are not made for prototyping. 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. It is in a more precise manner that manufacturers will be able to duplicate the production parts that they have. When you will have drift angles and undercuts then you have to use urethane since it is flexible in nature. It is the RTV (room temperature vulcanization) silicone where the molds are made for production of casting.
The moment that prototyping is done that you are able to create urethane parts similar to that of the actual production parts. This is the way where manufacturers are able to make several parts of the components that they need. There are many different uses for these parts like sales and marketing. An early samples for clients are what these parts can also be used for. 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 whole process of urethane casting process starts with a prediction of a master pattern or part. Creating the mold and master pattern will come from this one. The master pattern can be done using the different methods like machining. It is through stereolithography (SLA) that is one of the most common ways of making these master patterns. This one involves the use of UV-curable photopolymer resin in combination with a UV laser. 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. The RTV silicone is then poured around it so that the pattern will be fully enclosed in silicone. It is now the silicone that will be allowed to cure. There are cuts that need to be done so that the silicon can be removed from 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. Iit is now the silicone mold that can be reused for further production.