2. Hardness The surface hardness of most new feed rollers is between 30 and 35 degrees.
Long-term use will gradually become hard due to factors such as time, exposure to heat and light, and abrasion. It must be checked regularly to avoid damage to corrugated cardboard. When the hardness exceeds 40 degrees, it should be replaced.
â—† Relationship between the surface hardness and clamping tightness of the paper feed roller on the C board (set pressure 40PSI does not reach the strength of the damaged board) surface hardness (Shore A) feed roller extrusion depth 20 5.63mm
30 3.83mm
40 2.40mm
50 1.33mm
60 0.60mm
70 0.24mm
3. The frictional force that contacts the paperboard grips the paperboard generally at a depth of 1.2mm to 2.0mm to prevent slippage of the paperboard as it passes through the feed roller. The higher the coefficient of friction of the material of the feed roller, the greater the same degree of clamping can have a greater drag force. The shape of the surface of the lower paper feed roller (smooth surface, cross pattern, horizontal grain, etc.) has a significant difference in drag force. Improper guttering on the surface of the feed roller can affect the supporting force or the deformation space.
◆ The maximum pressure reference value of various corrugated paperboards (paper feed roller pressure point pressure) The paperboard crucible can withstand the maximum pressure reference value A楞35 psi (241 kPa)
C楞40 psi (275 kPa)
B楞45 psi (310 kPa)
E楞 90 psi (550 kPa)
The above is a general paperboard reference value, and the five-layer board (eg, B/C) is subject to pressure at a lower value (40 psi).
4. The reason why the clamp pressure increases due to the rigid flexing operation during high speed operation The change in thickness caused by the carton cover line cannot be reliably transmitted.
2. Unable to extend the paper to the printing unit due to lack of friction, it is necessary to grip more tightly to increase the drag force.
3. The cardboard stack has too much weight to increase and must be clamped tighter to increase the drag force.
4. When the cardboard is strongly dropped on the paper feed deck during stacking, the grip must be tighter to increase the drag force.
5. The position of the rear backstop is large under the cardboard, and it is necessary to hold the stacker more tightly to increase the drag force.
Conclusion In the face of fierce competition in the corrugated carton industry, more and more factories pay attention to the upgrading of production technology, relying solely on their own bit by bit to accumulate, and often rely on others' experience and technology as a shortcut, but now many problems lie in the equipment. Bad, it is tricky to improve. Choosing equipment that is truly suitable for your production needs is a topic that cannot be ignored in the face of competition.
Long-term use will gradually become hard due to factors such as time, exposure to heat and light, and abrasion. It must be checked regularly to avoid damage to corrugated cardboard. When the hardness exceeds 40 degrees, it should be replaced.
â—† Relationship between the surface hardness and clamping tightness of the paper feed roller on the C board (set pressure 40PSI does not reach the strength of the damaged board) surface hardness (Shore A) feed roller extrusion depth 20 5.63mm
30 3.83mm
40 2.40mm
50 1.33mm
60 0.60mm
70 0.24mm
3. The frictional force that contacts the paperboard grips the paperboard generally at a depth of 1.2mm to 2.0mm to prevent slippage of the paperboard as it passes through the feed roller. The higher the coefficient of friction of the material of the feed roller, the greater the same degree of clamping can have a greater drag force. The shape of the surface of the lower paper feed roller (smooth surface, cross pattern, horizontal grain, etc.) has a significant difference in drag force. Improper guttering on the surface of the feed roller can affect the supporting force or the deformation space.
◆ The maximum pressure reference value of various corrugated paperboards (paper feed roller pressure point pressure) The paperboard crucible can withstand the maximum pressure reference value A楞35 psi (241 kPa)
C楞40 psi (275 kPa)
B楞45 psi (310 kPa)
E楞 90 psi (550 kPa)
The above is a general paperboard reference value, and the five-layer board (eg, B/C) is subject to pressure at a lower value (40 psi).
4. The reason why the clamp pressure increases due to the rigid flexing operation during high speed operation The change in thickness caused by the carton cover line cannot be reliably transmitted.
2. Unable to extend the paper to the printing unit due to lack of friction, it is necessary to grip more tightly to increase the drag force.
3. The cardboard stack has too much weight to increase and must be clamped tighter to increase the drag force.
4. When the cardboard is strongly dropped on the paper feed deck during stacking, the grip must be tighter to increase the drag force.
5. The position of the rear backstop is large under the cardboard, and it is necessary to hold the stacker more tightly to increase the drag force.
Conclusion In the face of fierce competition in the corrugated carton industry, more and more factories pay attention to the upgrading of production technology, relying solely on their own bit by bit to accumulate, and often rely on others' experience and technology as a shortcut, but now many problems lie in the equipment. Bad, it is tricky to improve. Choosing equipment that is truly suitable for your production needs is a topic that cannot be ignored in the face of competition.
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