Folding Drawer Boxes With PVC corrugated board technology to reduce the loss of tile line operation essentials

Nov 11, 2022

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Corrugated cardboard line process is made by single-side corrugated machine corrugated and inner paper firmly attached single-side corrugated board, transported through the bridge to the supreme glue machine coated composite surface paper, into the dryer drying, according to the production requirements of line pressing, longitudinal cutting, cross-cutting and made into box board.

Obviously, the main reasons for the waste of base paper and the low yield of cardboard appear in the key processes of single-sided machine, conveying over the bridge, gluing composite, drying and cutting the line paper. The following is the common problems in the actual operation and how to deal with the author's opinion.

1. Single-sided corrugated machine

1) Input base paper after starting the single-sided machine, corrugated paper does not fit neatly with inner paper.

First of all, the output paper skew, speed up the moment can be guided.

Secondly, the tile paper roll with the side line is not in the same straight line. It can be solved by the "three-point one-line method". That is, a point is set on the preheater cylinder surface of the corrugated machine or the inner and tile paper. After the shaftless bracket is placed on the paper before starting up, the button is moved on the shaftless bracket at one end of the tile paper or the inner paper, and the left and right are adjusted visually until the edge line of the tile and the inner paper is lined with the set point at three points.

2) The base paper is cracked by the preheater, resulting in broken paper.

First of all, reduce the preheating area of paper. When the joint appears, manual traction base paper or according to the rotation direction of base paper auxiliary force to reduce the mechanical tension can be avoided.

3) When the tile and inner paper are inspected by the manufacturer, there is a small mouth about the size of a palm in the drum, and the single-sided corrugated board is short of material after input to the corrugated machine.

Before starting the machine to prepare a little larger than the palm, tile paper (color, gram weight /M2 should be the same as the corrugated paper on the base paper), the paper has a gap to take the paper, tile paper gap to take tile paper, dip in the glue tray a little glue liquid, in the base paper into the corrugated machine before the two sides of the gap can be stuck on. Action must be swift, accurate, timely and safe.

4) After meeting the production quantity, the remaining paper head, tile paper and inner paper on one side more and less.

In general, it is not necessary to cut off the base paper until the less used side is stopped. When stopping, the base paper should be neatly cut with a knife. Excess single-sided corrugated cardboard, the next production with the same size, the same quality of the base paper, in the transport bridge and the new single-sided corrugated cardboard bonded to use.

In addition, if there is some residual paper, it can be manually rerolled to the same specification and quality of the large drum.

5) Try to avoid frequent boot, can effectively eliminate the paper, tile paper is not bonded part.

2. Transport over the bridge

1) There is too much single-sided cardboard on the bridge, and the speed of the dryer is too fast or suddenly accelerated, and the adhesion is not strong.

Bridge operators should pay attention to the dryer uniform speed to increase the speed, start not too fast. Bonding broken end, the top lap surface should be in the direction of cardboard running, do not stop the joint. The stacking quantity of single-sided corrugated cardboard should not exceed one third of the bridge length.

2) When the width of single-sided corrugated cardboard and tile paper is inconsistent for some reasons, it will be scraped off by the clamping device that controls its direction.

When the tile paper width, the two clips of the paper clip should be adjusted to slightly less than the tile paper width; If the paper is wide, the part wider than the tile paper is neatly cut off in front of the paper clip.

3) After the dryer is started, each layer of single-sided cardboard is not aligned.

Before starting the dryer, move each layer of single-sided paper clipper outward 2-3cm according to the size of one side of the longitudinal edge cutter.

3, glue compound

1) In accordance with customer requirements with ordinary box board paper as face paper, after the preheater, the base paper becomes brittle, then into the dryer will be torn off. Reduce the tension of the face paper, or manually assist the rotation of the web until normal.

2) After entering the dryer, the paper and single-sided cardboard have different edges, and the emergency production paper width is different.

First of all, when each layer of paper edge and paper head is aligned, it can be sent to the dryer. When it is sent to uneven, the speed of the dryer can be accelerated, but the uneven part has been a waste. Whether the face paper is wider or narrower than single-sided corrugated board must be on one side.

Moreover, if the edge of the face paper web and the paper clip board are not on the same vertical line, even if the base paper edge, paper head alignment feeding and drying machine, running a distance will be uneven. In order to solve this problem, we may wish to drop the line from the side of the cardboard clip of the conveying bridge paper clip in advance. It is appropriate to drop the line to the top of the shaftless support of the face paper 0.5cm away from the web paper, click the button on the shaftless support, and the edge of the surface adjusting paper is perpendicular to the line drop.

4. Dryer

1) The dryer stops for a long time, resulting in a large area of cardboard unglued, especially the three-layer board.

If it is necessary to stop, the operator will predict the stopping time according to the situation. If it is not a short time (more than two minutes for five layers of board, more than half a minute for three layers of board), the paper should be cut off before the glue machine, and the cardboard should be out of the baking road.

2) The dryer conveyor belt runs off, and the cardboard edge is unglued and glued badly.

Adjust the correcting hand wheel; When stacking, the unqualified cardboard is detected and glued manually.

3) The temperature of the drying channel of the dryer is too high, and the glue of the cardboard is degumming and breaking, which is mostly seen in the inside paper of three layers of cardboard and crisp quality.

Increase the speed of the dryer, exhaust steam and depressor, and inform the glue machine to increase the amount of glue.

5, press line, vertical and horizontal cutting

1) Line press wheel crush inner and face paper; The pressure line exceeds the allowable error.

Depending on the dry humidity of paper and cardboard, flexibly adjust the depth of the pressing line, with the paper indentation inside clear not broken not cracked is appropriate; In addition to the size error is the line pressing wheel concave wheel deflection, correction can be.

2) The cutting edge is not adjusted in time, resulting in cardboard material shortage, dew, the sum of two cutting edges is less than one centimeter common.

Should timely adjust the slitting machine left and right moving device, if necessary can inform the conveying bridge left or right to adjust the clamping device.

3) The crosscutting knife is too blunt, and the production of imported cowhide carton board is easy to tear the cross section.

Should be polished or replaced in time with a new knife; Do not set the base knife too tightly to avoid injuring the knife.

In addition to the root cure of the above problems, according to the quantity and size of the produced cardboard, rational use of paper, try to control the cutting edge of the cardboard within 0.5-2cm, clever collocation of production, accurate and timely treatment of faulty paper disease, the unadhesive missing cardboard without affecting the quality of the condition of repair and utilization, eliminate human waste, you will find the cardboard line to reduce the damage of paper, The effective way to improve the yield.