How to extend the life of silicone molds?

- Apr 07, 2018-

Silicone mold is a special mold for making handicrafts. The raw materials for plastics can be divided into ordinary silica gel and meteorological silica gel according to the performance. The characteristic of silica gel is high temperature resistance, corrosion resistance, strong tear resistance, high simulation precision, and various kinds of handicrafts. Molds. The choice of mold opening and mold line selection is very important. The first is to facilitate mold removal. The second is that the mold line should be selected so as not to affect the product's overall effect. Third, it does not affect the product quality. The fourth is to reduce the number of process operations, such as opening. Half mold.

     What is the normal service life of the die for molding silicon rubber? General E-class 4-6 million die, O-RING 8-10 million die. How to extend the life of silicone rubber mold? First, the silicone mold must be placed 24 hours before it can be put into production. Silicone rubber soft molds should have a spacing of at least 10 minutes after a single production of product is released from the mold; molds should be sprayed with some mold release agents before use; silicone rubber molds should be placed in a stable manner during use, and the tilt should not be More than 20 degrees. In the process of mold release from the mold should be as gentle as possible, and should not use force to tear the tear. When the silicone mold is temporarily not used, it should be stored on the shelf and cannot be detached from the mold. It is also the most important point that the appropriate mold silicone should be selected based on the texture, shape and size of the product being produced, preferably for special glue.

    How often does the silicon mold die? Too much silicone oil is added during the production of the mold. Silicone oil destroys the molecular weight of the silica gel, so the mold will appear less frequent and not durable. If you say that products with relatively small patterns are more complicated, and you open molds with hard silicone, there will be fewer turns, because the time for the silicone will be brittle and it will break easily. On the contrary, if you build a product and use a small hardness silica gel mold, the result will be equally unsatisfactory. Because silica gel is too soft, its tensile and tear strength will be reduced, and the resulting mold will be deformed, so the number of turnings will be reduced. The quality of the mold adhesive itself is very good, silicone is not good or bad, only suitable and not suitable. We need to use silicone for the hardness of the product to make the mold will not appear this situation.

    According to different products, add different amounts of silicone oil or no silicone oil, because silicone oil will destroy the molecular weight of silica gel, resulting in reduced number of turning. The amount of silicone oil to be added to ensure that the amount of (preferably not more than 5%), excessive silicone oil will cause the silicone product to reduce the number of mold reduction, poor pull, tear strength decreased, intolerance of salt and alkali, not aging and other quality degradation phenomenon The mold glue and the curing agent must be stirred evenly to prevent unevencuring, resulting in a drop in product quality. Before the silicone mold is formed, a mold release agent must be added to the mold, and when applying the mold release agent, care must be taken to evenly apply the mold release agent. To polish or polish the copied product or model, to prevent the surface of the silicone rubber product from being made to be matte and unsightly.