It is well known that silica gel masterbatches cannot be put into production directly after production, but need to be used in conjunction with products produced by other processes. It means that most extrusion manufacturers tend to prefer to produce heavier weight, so that the unit price and production capacity of the product can be increased. Under this background, many are unwilling to produce small-sized products such as 1mm silicone masterbatch. With the continuous improvement of the process, some manufacturers are slowly producing these silica gel masterbatches. According to the market, the current silica gel die extrusion can reach more than one output, which solves the problem of low production capacity.
So now extruding silicone masterbatch method 1, die extrusion is a more practical production process at present, because the conventional silicone extrusion mold is cut on a flat jig, and can cut multiple 1mm apertures. Theoretically, it can be done Dozens of times, the reason why the silicone masterbatch has only a dozen holes (one product per hole) is because the silicone is soft and has no support when it is not vulcanized at a high temperature after extrusion. If there are too many holes, it will be easy If there is a collapse, the silicone masterbatch strips extruded above will stick to the middle and the strips extruded in the middle will collapse below. In this way, directly entering the oven to add vulcanization will cause the silicone masterbatch strips to entangle with each other. Bonding until the back end becomes a messy product, which is not good for production, so the diameter of the silicone masterbatch mold is on the same plane, so even if the inertial silicone is not added vulcanization It doesn't matter if it falls forward, and there will be no bonding problems. When entering the oven, the silicone will shrink, which will cause the gap between the silicone masterbatch strips to narrow, and this slight bonding problem can be gently removed. Just tear it apart by hand. This silicone masterbatch extrusion method can meet the production capacity increase problem of the manufacturer, and can also solve the unit price problem for the customer. The advantage of the die-discharging production process is to facilitate the back-end processing and cutting to be consistent. This kind of cutting length is generally relatively small, and requires a more precise cutting process to produce, and the silicone masterbatch produced by the die is just right!
There is also a single-hole single-mode and a multi-hole extrusion method, which is more in line with the production of silica gel masterbatch in terms of production alone, but one solution needs to be ruled out, that is, single-hole single-mode is not acceptable, because 1mm Silica gel masterbatch is small in size, if you use one out one, the precision of the product size is better, but due to the limitation of production capacity, you can't produce much in a day, which will lead to an increase in product prices because the manufacturer's production capacity has decreased. Another is to use a vertical machine to extrude the silica gel masterbatch, because the machine is vertically descending the silica gel to cut N small holes on the mold, and after the silica gel is extruded, the silica gel masterbatch strip that is vertically descending for the machine head will be As the vertical inertia is separated from each other, enter the oven for vulcanization. Because of the volume of the silicone masterbatch glue, the vulcanization time is relatively fast, so the rotation speed of the threaded rod of the vertical machine and the transmission speed of the drying tunnel will be accelerated. This is done. Silicone masterbatches will not cause bonding problems, but the small and soft ones themselves will encounter great challenges in the cutting process. The cutting length is different because it is not a whole but multiple A whole is cut together, which leads to the problem of inconsistent cutting lengths!
In general, the silicone masterbatch produced by die-cutting silicone mold row is in line with the current actual situation