Development and common problems of hose sealing technology

With its convenience, diversity and relatively low cost, hose packaging is becoming more and more a mainstream packaging method in the daily chemical industry, and this trend is also emerging in other industries Therefore, the hose packaging technology has naturally attracted more and more attention of the industry users The level of hose packaging technology, to some extent, depends on the development of sealing technology At present, the hose sealing technology develops rapidly in Europe, followed by Japan and South Korea, while China is still in its infancy The development of hose sealing technology from different ways of heating, the evolution of hose sealing machine has experienced the following four stages: heating ring → external heating → ultrasonic → internal heating In the evolution of these different ways of heating and tail sealing, it is worth mentioning two companies in particular: kalix, the founder of external heating, and Norden, the pioneer of internal heating technology With the change of the market, the two technologies of heating ring and external heating have basically withdrawn from the market, and the ultrasonic sealing technology is still applied in a few fields, while the internal heating sealing technology is popular in Zui today, and it is also a sealing technology commonly used by all the suppliers of hose sealing equipment Analysis of internal heating tail sealing technology although it is a relatively mature technology, many users of hose tail sealing machine still encounter various problems in use In addition to the low quality of the equipment itself, the main reason for these problems is the correct operation and debugging of the equipment Now we will analyze some common problems (excluding those caused by the low quality of the equipment itself) Firstly, before analyzing the specific problems, the equipment shall be tested as follows: ● check whether the actual running speed of the equipment is the same as that of the initial commissioning of the specification; ● check whether the Leister heater is in the open position; ● Check whether the compressed air supply pressure of the equipment meets the pressure requirements of normal operation of the equipment; ● check whether the cooling water flows smoothly and whether the temperature of the cooling water is within the range required by the equipment; ● check whether the filling of the equipment has the phenomenon of dropping paste, especially to ensure that the paste does not stick to the upper part of the inner surface wall of the pipe; ● the inner surface of the hose shall not contact with anything to avoid contamination of the inner surface wall of the hose; ● check whether the air intake of the Leister heater is normal ● check whether the temperature detector inside the heater is in the correct position ● check whether the suction device of the heating head works normally After the above initial detection, we will analyze some common specific problems: phenomenon 1: the phenomenon 1 on the left is usually caused by too high temperature At this time, it is necessary to check whether the actual temperature is the temperature required for the normal operation of the hose of this specification The actual temperature on the temperature display should be relatively stable at the set temperature (the normal deviation range is between 1 ℃ and 3 ℃) Phenomenon 2: there are ears on one side as shown in the figure below: first check whether the heating head is correctly placed in the heating head nest; then check the perpendicularity between the heating head and the hose below Another possible reason for the phenomenon of ears on one side is the deviation of the parallelism of the two Tailboards The deviation of the parallelism of the clamp tail plate can be detected by a gasket between 0.2 and 0.3 mm (the detection method is shown in the left figure) 3 The seal tail begins to crack from the middle of the hose This phenomenon appears that the size of the heating head is not enough Please replace the larger heating head The judgment standard for the size of the heating head is to insert the heating head into the inside of the hose, and then pull it out When pulling out, it feels a slight suction Phenomenon 4: "eye bag" appears under the explosion-proof line of the tail sealing: the height of the air outlet of the heating head is incorrect, which can be adjusted according to the following methods Phenomenon 5: the middle depression at the tail end of the hose cutting: this problem is usually caused by the wrong size of the tube cup, and the hose is too tightly clamped in the tube cup Judgment standard of the size of the tube cup: the hose should be fully stuck in the tube cup, but when the tail is clamped, the tube cup should not affect the natural change of the shape of the hose The above listed are just a few common sealing problems The user of the hose sealing machine has to analyze and solve the specific problems according to the specific situation Although the internal heating technology is now a commonly used hose sealing technology, the real mastery of this technology is a long time of experience accumulation At present, several well-known hose sealing machine manufacturers (such as Norton and Kellogg) are undoubtedly ahead of other manufacturers Norton is far ahead of all other companies in the field of special-shaped sealing of hose, while Kellogg is highly praised by many cosmetics users for its convenient operation and replacement of heating system.