With the non-P VC Film soft bag infusion increasingly fierce market competition, with prices lower three layers of Pharmaceutical companies More and more, this can reduce costs, enhance the competitiveness of their products. Relative to the five films (especially M312C), the three film forming temperature is low, poor welding performance, poor adaptability to temperature, especially when welding and hard interfaces prone to Weld (no weld) or coke (welding temperature is high) phenomenon.
Qianshan Pharmaceutical Machine Since the end of 2002, introduced DSY-3 type of non-PVC film soft bag infusion production line has been offered, including later DSY-4, DSY-6-type DSY series of three models, including non-PVC film soft bag infusion production line; 2006 launched in July after the SRD series compact high-speed non-PVC film soft bag infusion production line. Mainly on the following three films and film around the welding interface, welding and hard to analyze these two parts of two series of non-PVC film soft bag infusion line of the three layers of adaptation.
Surrounding soft bag making machine welding is completed the forming station, the factors that affect the film forming three: temperature, pressure and holding time. Which is the most difficult to control the temperature factor, because the forming temperature is a dynamic equilibrium value, while the pressure and time settings are stable upon the same. Forming station forming temperature uniformity and stability of the forming temperature is the temperature of the two important factors. Now, to each bag, forming four production lines, for example, to compare two generations of models before and after the forming station in the difference between these two factors.
DSY-4 Non PVC film soft bag infusion production line forming station's heating and forming tools for the split, forming mold pressed in the hot plate, its temperature is passed over heating, the temperature The transfer principle is the direction from high temperature to low temperature, local delivery, so the temperature of heating plate temperature is always higher than the mold. Meanwhile, the feedback temperature sensing probe is installed in the heating plate, the left and the right three-point distribution in the heating plate, so the temperature control unit display and control the temperature but the temperature does not die temperature of heating plate .
Experiments, we found that heating plate and the mold temperature difference and is proportional to the speed of production lines, production lines that the faster the heating plate and the mold temperature the greater the temperature difference between the rated speed value of about 8 degrees . When the temperature difference value is greater than the membrane forming the required temperature error, then the film formed on the wide fashion. M312C film forming temperature error of up to 10 degrees, while the three PP film forming temperature error of about 4 degrees. Therefore DSY series production line PP film production with three production rate is only down to meet the requirements of forming bags.
From the above analysis, we also found that only three hot plate temperature control point, and each bag is formed of four, so hot plate temperature control point does not correspond with the number of forming the bag, that is Around the same bag is not the same soldering temperature, mold temperature uniformity is poor.
SRD series production lines forming station design completely eliminates the above deficiencies. First, the heating pipe installed directly on the forming mold, reducing the temperature of transmission distance, while a temperature probe directly on the forming die forming surface temperature show that temperature and the temperature of the mold surface forming the same, there is no temperature difference. Forming die each bag has a temperature probe, thus ensuring that the same bag, the temperature of forming the same, that is, better uniformity of mold temperature. From the above analysis shows, SRD series of production lines forming station forming mold temperature control and temperature uniformity to be higher than DSY series is more suitable for forming three layers.
Film and hard interfaces welding preheat station mainly by the interfaces, and interfaces forming station completed the welder. As the high temperature hard soldering interfaces, while interface, bulky hard to make it in the molten state will need to absorb more heat. If only the film in the interface into two interfaces with the membrane after the completion of welding, you need to film the temperature tolerance of welding welding interface is much higher than the temperature, the three-tier film is not up to this requirement. Therefore, film and interface layer welding, preheat the interface must advance, it can be welded in the state. I am a professional writer from China Manufacturers, which contains a great deal of information about zinc oxide tape , micropore surgical tape, welcome to visit!
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