Steel drum extrusion board on hydraulic press
Inner Mongolia Hohhot Barrel Factory Li Jianbao
The 100 kg calcium carbide barrel produced by our factory belongs to Class I dangerous goods packaging steel drum. Its quality requirements are very high. 6 While ensuring the appearance quality, its performance requirements, a drop test of 1.2 meters height. After falling, it is qualified to pass the air pressure test without leakage. To ensure that it does not leak, a seven-layer triple arc beading process must be used. The width and angle of the barrel edge are important geometric dimensions to ensure the quality of the seam. Only by ensuring the quality of the edge-finishing process can a reasonable fit between the lid and the barrel be ensured, thus ensuring the quality of the crimp.
When the factory is combined, the gap between the barrel and the bottom cover is 1-2mm as shown in the figure. After the sealing machine is pressurized, the edge portion of the barrel is inserted into the pre-rolled edge of the bottom cover, and is rolled by a roller.
According to the actual situation analysis of our factory, the forming and pre-rolling of the bottom cover has reached the technical requirements, and the edge of the barrel is rolled and pulled, and the following problems still exist: the width of the wrench is uneven, and the error is between 2 and 4 mm; The shape and angle of the edge are different. Thereby, the quality of the crimping of the sealing machine is affected.
To this end, we have improved the edge-trimming process by changing the rolling edge to the pressing edge. On a one-day hydraulic press, a set of flanging molds are installed on the upper and lower sides, and the two ends are simultaneously formed. The quality of the pull-out edge is greatly improved: the ends are the same size, the angles are the same, and the width of the pull-edge is uniform, which can reach the bottom cover of the bucket. The technical requirements of the cooperation. After the edge-trimming process is improved, the quality of the crimping seal is greatly improved; the curling is relatively uniform and full of seven layers; the drop and air pressure tests all meet the process requirements. After a period of use, the quality of the crimp seal is very stable.
I think that the edge-trimming process is a key process in the production of barrels and the basis for ensuring the quality of the seals. The improvement of this process in our factory is relatively simple, the mold is easy to manufacture, and the investment is small, and the effect is quick, which is most suitable for small barrel factory.
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