Prototype model of soft rubber toy

The soft rubber prototype has a soft hand feeling and its hardness is generally 30 ~ Between 90 degrees, because the soft rubber prototype is flexible, it is widely used in the prototype industry. The processing method of soft rubber prototype is relatively single, and only vacuum double mold can be used for processing-- That is, first use 3d printing or CNC machining to make a prototype, and then use a vacuum laminating machine to copy the prototype. Generally, a prototype can be copied 15 ~ 20.

some time ago, we completed a soft rubber prototype project, which is to make a small batch of toy prototypes, because the shape of this sample is relatively complex, we used 3d printing when making the prototype, and then we made a silicone mold using this printed prototype, when making a silicone mold, first put the prototype into the electric wood box, then inject the silicone liquid along the water inlet. After the silicone liquid solidifies, take out the silicone mold and cut the mold along the mold line, take out the prototype.

after making the silicone mold, the next step is the injection type, first of all, we need to seal the periphery of the silica gel mold, leaving only the nozzle, injecting soft glue liquid from the nozzle, vacuumizing, and baking the mold in the oven so that the silica gel mold can accelerate curing and forming, after the soft rubber liquid is cooled, the soft rubber prototype can be taken out.

The following figure shows the injection of soft glue liquid from the nozzle

The following figure shows the injection of silicone mold into the oven medium

notes:

1. Because it is easy to deform in the process of silica gel complex molding, a set of silica gel molds can only be copied for more than a dozen and then scrapped.

2. I think everyone knows the principle of thermal expansion and cold contraction, so in order to achieve the same size as the drawing above, generally, the silicone mold will be slightly larger.

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