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. 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. 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.
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. It is in sales and marketing where these parts are being used. 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. Using these materials as a substitute for the actual material is a thing that you should not be doing. 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. Ther is also a common method in making these master pattern and that is through stereolithography (SLA). 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.
Whenever the master pattern is created then it is now suspended in a box or frame with a gate assembly. By pouring the RTV silicone around the master pattern that it 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. Whenever the urethane material has hardened then it is now removed from the silicone mold. The silicone mold can now be reused for further production.