In the process of silica gel complex mode, due to various reasons, will lead to hand the distortion, which affects the precision of the plank.
today we on the several typical deformation reasons.
Not fully cured mold silicone not cured fully invested before use (
Do not) in the outside
While casting mould can generally within a few hours after take out the mould, but mold rubber cured fully at least more than a week, if enough time, casting mould a month later and start to use is the best, but now the pursuit of high efficiency, high quality so placed after long time use is unlikely drop again.
< br /> belongs to condensation silicone mold silicone is, it is by absorbing moisture in the air and curing, silica gel in the process of making the water evaporated, and no transfer into the right amount of moisture, can appear the phenomenon.
Solution: this phenomenon does not belong to quality problems, but because there is no control moisture, improve the shelf life of silicone, long shelf life will appear some phenomenon, as long as in the use of silicone, right amount add 0.
05% water, stir evenly can solve some conditions.
< br /> 2, silica gel quality < br /> poor quality of the silicone mold production mold using silica gel, such as: silicone shrinkage rate is too high, or to reduce the padding and use too many other products.
high-grade mold plastic shrinkage ratio of 0.
1%, average around 3%, low mold plastic shrinkage rate is higher.
< br /> < br /> 3。
Material shrink / vacuum low-pressure perfusion hand-board needs when note type high temperature plastic particles into molten state, and the material is affected by heat bilges cold shrink, the perfusion might be just the right size, once cooled down, will appear to shrink/warp, etc. , makes the product accuracy is not up to standard.
< br /> 4, work platform uneven < br /> placed silicon mold vacuum infusion of tilt table.
If you want to make a good model to hand, placing the silicone mold table must be smooth.
Facilitate material evenly into the well.