Slotted carton forming error affecting the key factor analysis (middle) – Carton
pressure line parallel Pressure line parallelism is the direction of pressure relative to the length direction of the length of corrugated shape, the pressure is bound to the two parallel lines if and flute-shaped cross, this trend will become more unstable carton forming. Pressure line parallel to the degree of error is tilted by the feed or transport skew caused by the adjustment in place if the device is generally avoided.
pressure line depth Pressure molding line depth on the carton great impact, but it is also a requirement of the most difficult to grasp, because the increased pressure line depth though the stability can be improved carton forming, but will also bring down the cartons and blast lines, in particular the use of low-grade base paper of corrugated board issue will become more obvious and reasonable need to grasp the depth of pressure line operator experience.
indentation line cross section Indentation line cross section mainly refers to the pressure line of round cross section shape, the pressure line in the same depth under the premise of the pressure lines of different cross section shape will produce very different results, as shown in Figure 2, several line pressing roller section shape, the processes used to determine the location of the center line and the baseline pressure is essential to the changes in its shape and size and shape of base level, with the round shape of a protruding surface sloping foundation ; shape is round with two protruding flat base surface; shape is square with the first three processes, circular base surface. What kind of shape the most effective? Proved by the shape of a large number of the best, the worst shape 2, the main reason is the basis of the shape of a cross section surface and impress the most relevant, in the same under the indentation depth, the minimum damage on the board, creasing cross section The most favorable folding carton forming along the baseline indentation.
Figure 2 Pressure Reel Slot skew Slot skew is the main causes of scissors, the size of the carton forming a great impact, because the slot knife cutting board in a large cutting force required, and this is the cutting force relative to the board asymmetric, so cardboard in the slot in the process of significantly inclined trend, as shown in Figure 3, which is slot knife and cutting board with the board contacts diagram, can be seen from Figure slot knife is not opposed to cardboard symmetry, so that the cutting force is not symmetrical relative to the board, in particular, slotted slotting process starting position, cardboard is prone to tilt, when the feed speed and direction of the short length of the case, this trend particularly noticeable. Direct cause of this tilt indentation edge lines and slotted non-parallel relative to the board, as well as indentation inconsistencies between the lines and slotted edge, scissors and paper box forming size error follow.
Figure 3 Schematic diagram of slot cutting
How to prevent the tilting board trend in which the time slot? Slot machines usually rely entirely on the press line round the guiding role of the corrugated board, but the reason for the longer arm of force (usually slotted cut point relative to the pressure line tangent point distance is greater than 300mm), this point in the slot created force passes through the arm to the pressure line point is magnified its force, it can not prevent creasing corrugated wheel tilt trend. To prevent the board in the slot when the slot machine tilt trend of some printing location an increase in guide slot knife section shown in Figure 4, this guide bar and slotting knives are very close to the impact of little arm, cardboard orientation effect will significantly increase, but more flexibility oriented bars, the pressure load on the cardboard can not too much (if too much pressure will damage cardboard), the guidance can not achieve ideal results.
Figure 5 slot cutter to the diagram
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