You’ve seemingly seen many tutorials on making silicone components utilizing 3D printed molds on-line. The overwhelming majority of those strategies use a easy pour technique to fill the mildew. This depends on cautious degassing and delicate pouring to cut back the presence of bubbles within the closing end result. [Jan Mrázek] has been engaged on an alternate technique nevertheless, that permits for injection molding at low value within the house store.
The method depends on using printed resin molds. [Jan] notes that this usually necessitates using condensation-cure silicones, as additive varieties don’t remedy properly in resin molds. The condensation silicone is combined up, degassed, and poured into a typical cartridge. From there, it’s put in in a silicone supply air gun, which makes use of compressed air to pressure the silicone out of the nozzle and into the ready mildew.
It’s mainly utilizing a bunch of house DIY gear to create an affordable injection molding resolution for silicone components. [Jan] notes that there are a number of mods wanted to mildew design to go well with the method, and that 400-800 kPa is an efficient strain to inject the silicone at.
Having the silicone injected beneath strain is nice for advanced mildew designs, because it forces the fabric into all of the little tough nooks and crannies. After all, we’ve seen different strategies for making silicone components earlier than, too. You should definitely pontificate within the feedback with your individual favored methods for producing high quality silicone components. Video after the break.