About the application of automatic vacuum feeder in capsule filling machine

At present, the proportion of hard capsule in the market of medicine and health care products is increasing day by day The capsule filling machine, as the basic equipment of its production, will be more widely used, and people's requirements for its application will also be improved Although the manufacturing and technology of the domestic capsule filling machine is basically mature, the drawback of the United States and China is its feeding mode Chinese people also deal with it through a variety of feeding modes In the face of a variety of feeding modes and national conditions, how will people choose the feeding mode? Since the large-scale application of capsule filling machine to produce hard capsule in China in 1980s, the feeding mode has gone through several processes: from the original manual ladder dumping to conveyor belt conveying, from barrel lifting to positive pressure conveying, from vacuum conveying to automatic vacuum conveying, and also cross layer pneumatic self weight conveying The development of these processes shows the progress of their loading methods with the development of the times 　　 At present, in the production of solid preparations in China, except a few of the capsule filling machines still use manual ladder or other methods of feeding, the automatic vacuum feeding machine and bucket elevator are mainly used for feeding These two methods have their own advantages With the maturity of the automatic vacuum feeding machine technology and the structural limitation of the workshop under construction in the near future, the automatic vacuum feeding machine will show a practical side However, the purpose of these two loading methods is to overcome the imperfections of the manual ladder dumping method: (1) because the mixed powder needs to be placed in a turnover bucket and transported to the capsule filling process, the original manual ladder dumping method, its loading and dumping process will cause dust flying, polluting the site, equipment, operators, etc., and air purification, ring, etc Environmental health and personnel health are also extremely adverse At the same time, the production site and production equipment are not easy to clean The filtration device of purification system is easily blocked or damaged, resulting in poor filtration effect and reduction of purification level (2) In the manual ladder pouring mode, the labor intensity of operators engaged in transportation and ladder pouring is also very large 　　 In this paper, based on the automatic vacuum feeding machine which was recently launched by Ruian Feiyun Machinery Factory (Xiajian Feiyun factory) and matched with the capsule filling machine, the structure and principle of the automatic vacuum feeding machine are described starting from the basic overview of the capsule filling machine feeding, and through the comparison between the automatic vacuum feeding machine and other feeding forms, the automatic vacuum feeding machine is comprehensively analyzed The application of capsule filling machine has the characteristics of practicability and economy 1 Structure and principle of automatic vacuum feeding machine Among them, the main machine will take on the functions of the transfer path of powder or other materials into the bin, the occurrence of vacuum source and the intermittent cleaning of the built-in filter bag; the level sensor will control the feeding amount of the automatic feeding, and keep the level of the hopper of the capsule filling machine within the required range 1.2 principle of automatic vacuum feeding machine when the automatic vacuum feeding machine is working, the working chamber of the main machine will generate high-speed flow of air under the negative pressure of 0.03mpa, and the materials in the turnover barrel will be sucked into the working chamber of the main machine through the conveying pipe, and then the materials inhaled will fall into the hopper of the capsule filling machine in a spiral shape by using the self weight While the vacuum gas source and material path are equipped with imported filter cloth for clean filtration, and along with the feeding process, the micro powder attached to the filter cloth will be cleaned by mechanical automatic shaking to prevent the vacuum path from being blocked The automatic control process: in the middle and lower part of the hopper of the capsule filling machine, there is a lower sensor (the position can be determined according to the hopper size and production speed), and the other upper sensor is fixed at the bottom of the automatic vacuum feeding machine When the material level in the hopper of the capsule filling machine drops to the unloading level, the sensor transmits the signal to the controller to make the main machine of the automatic vacuum feeding machine work in the vacuum air flow, the material is sucked into the working chamber of the main machine, the control system stops automatically according to the set time, the material in the working chamber of the main machine presses open the valve and falls into the hopper of the capsule filling machine, completing the automatic loading process once In this way, the automatic vacuum feeder will complete the whole process of feeding the materials in the turnover barrel into the hopper of the capsule filling machine Comparison of 2 automatic vacuum feeding machine with other feeding methods For the feeding of capsule filling machine, most of them transport loose particles or powder like materials (also have small tablets) Although there are many ways to choose the feeding of capsule filling machine, with the development of pharmaceutical industry modernization, the disadvantages of traditional manual ladder feeding method, such as high labor intensity and serious dust pollution, will tend to be eliminated However, most of the remaining feeding methods include constant positive pressure feeding, automatic vacuum feeding and bucket lifting feeding, which can basically achieve the purpose of reducing labor intensity, reducing dust pollution and protecting drugs, but each has its advantages and disadvantages The following is a comprehensive comparison 2 (as shown in Table 1): It can be seen from the comprehensive comparison in the above table that in the feeding method of the capsule filling machine, the automatic vacuum feeding machine is used, and it can also be matched with the whole capsule filling machine 3 The characteristics of the application of the automatic vacuum feeder in the capsule filling machine 3.1 the practicability of the application of the automatic vacuum feeder in the capsule filling machine Among the many automatic vacuum feeders, Feiyun factory recently launched the automatic vacuum feeders matched with the capsule filling machine, which is optimized and reformed on the basis of absorbing the advanced technology of Germany, Sweden and other countries, combined with the national conditions Compared with other products (of course, there are better products in China), it has the following characteristics: (1) hopper and vacuum source are integrated, compact and compact, no dust pollution, low noise; (2) simple installation, can be installed in any place, only need 220V power supply (3) the operation is simple, the automatic vacuum feeding device is fast, and the conveying capacity can meet the demand of the hopper loading capacity of the capsule filling machine, which can be confirmed by the experimental data 3 (as shown in Table 2) At the same time, the intelligent control is achieved, which can realize the automatic feeding operation; table 2 experimental data 1 material conveying length feeding time cleaning time Single conveying capacity conveying speed 16 mesh particles 4m 10sec 1min 5-7kg 300kg/h 　　 (4) the mechanical cleaning method is used to clean the adsorbate of the filter medium, rather than the reverse blowing method of compressed air commonly used by similar equipment, so as to avoid the pollution caused by the contact of the compressed air with oil or water pollution This is because the medicine has specific requirements for the compressed air (such as the oil content is less than 0.3%, the dust particle is less than 0.01 μ m), and the pressure is also omitted The installation and operation cost of the compressed air pipeline; (5) the vacuum feeding can basically achieve the layering problem without mixed materials, which can be confirmed by the experimental data (as shown in Table 3); table 3 the experimental data 2 the mixing degree of materials (mixtures) before feeding The conveying length of the mixture after loading is 50% of the blank particles / jade powder (no change) for 4m Rice / millet 50% 50% (no change) 4m (6) it can be used in the clean workshop with a height of 2.7m The automatic vacuum feeding machine only needs to be installed on the frame of the capsule filling machine The total height of the machine equipped with the vacuum feeding device is about 2.37M (i.e the height of the machine + 500mm), which can be easily used in most of the workshops under construction It is difficult for the bucket elevator to be used in the 2.7m-high workshop As for the 100kg charging specification of the fixed elevator feeder, its column height is 2715mm, so the use of the elevator feeder has certain requirements for the workshop floor height 3.2 economy of application of automatic vacuum feeder in capsule filling machine At present, automatic vacuum feeder and bucket elevator are commonly used for feeding of capsule filling machine, which have their own advantages For the design of solid preparation workshop (i.e non hopper mixer production process is adopted, because Zui still needs turnover bucket transfer when two-dimensional or multi-directional mixing is used), on the basis of turnover bucket transfer, by comparing the economic operation costs of the two, it can be concluded that It can be seen that the automatic vacuum feeder is the best choice for Zui Based on the total loading capacity of 600kg per working day, calculate the annual operation cost of the two (as shown in Table 4): From the above calculation, it can be seen that the difference between the total operation cost of the automatic vacuum feeding machine of the capsule filling machine and that of the bucket elevator is 2.091-1.751 = 0.34 million yuan, and the investment of the automatic vacuum feeding machine can be recovered within 6 years It can be seen that the operation of the automatic vacuum feeding machine of the capsule filling machine can be realized The cost is low In this paper, the structure and principle of the automatic vacuum feeding machine are described, and through the comparison between the automatic vacuum feeding machine and other feeding forms, the application of the automatic vacuum feeding machine in the capsule filling machine of Ruian Feiyun Machinery Factory is analyzed The conclusion is as follows: in terms of practicability and economy, the application of automatic vacuum feeding machine in capsule filling machine has comprehensive characteristics that can not be replaced by other feeding mechanisms, and it is also the first scheme of workshop under construction.