Your Guide 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 process is basically the use of a temporary polymer mold that also produced from a master pattern or part. It is this process that is needed in order to provide a fast prototyping. If you have a material that is not made for fast prototyping then you will need this process. It is the urethane that is considered to be the material of choice in this process since to is very cost effective. The material’s mechanical properties can also be matched by the urethane making it a perfect fit. 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.
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. Whenever this process is done then it is also the time where manufacturers will be able to make several parts that are needed. There are many different uses for these parts like sales and marketing. These parts can also be used as an early samples to clients. If you will be considering these parts then they can also be utilized as a testing prototype. Using these materials as a substitute for the actual material is a thing that you should not be doing. If you have a failure mode testing or a life testing of components then this is very important to take note of.
The production of a master pattern or part is the very first step in the urethane casting process. It is these patterns that will be used to make the mol and the master pattern. 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 is done by using a UV-curable photopolymer resin in combination with a UV laser. This process will help create a 3D component.
Whenever the master pattern is created then it is now suspended in a box or frame with a gate assembly. The RTV silicone is then poured around it so that the pattern will be fully enclosed in silicone. There is now a curing o the silicone after this one. 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. It is now the urethane material that can be removed from the silicone mold once it hardens. The silicone mold can now be reused for further production.