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First, the bottle straight cracks.
Definition: Cracks extending vertically downward from the top of the bottle.
Inspection: Rotate the bottle. Cracks can be seen from the reflection.
Ideas: First consider the supply of materials, step by step from the elimination of the process.
A: Feeder Analysis:
1. Dropping temperature is too low;
2. The shearing installation is bad, the scissors are not fast, the scissors scission is large, and the spray water of the scissor is too much to lower the temperature of the tip of the material drop;
3. Homogenization of gob is not good, yin and yang;
4. Inappropriate material shape, the tip is too sharp.
Corrective measures:
1. Adjust the temperature of gob
2. Change the scissors and reduce the number of scissors to spray water or adjust the scissors so that the drop does not appear scissors;
3. Check the feeder sizing cylinder to find out the reason for the uneven temperature change of the material and adjust the solution;
4. Adjust the shape to fit.
B: Bottler adjustment and operation reasons analysis:
1. The contact time of the core is too long, resulting in the bottle mouth being too cold;
2. Excessive air movement, excessive pressure or excessively long time; incorrect correction of the funnel mechanism, disagreement with the first model! Inflation causes initial vibrations.
3. Punch or die is too cold (press-blow);
4. During pressure-blow operation, the air pressure of the punch rose or dropped was too large (mechanical shock);
5. Core and die not aligned (mechanical shock);
6. Core and core head loose (press-blow operation using quick-change sleeve);
7. The core locking plate is loose (the core and die are not aligned);
8. Incorrect installation of the head arm before blowing (not aligned with the mold or too low), the blowing head is shallow and it presses against the bottle mouth;
9. Blowing head dropped to mold, blowing too soon;
10 The air blowing core is bent and touches the bottle mouth;
11 Pressing - blow operation, the pressure used by the punch is too large or too long;
12 core cooling is not suitable, excessive cooling;
13 Blowing time is too long!
14 Clamping bottle jaws are too cold; the clamps move too much, or the openings of the opening mechanism are too heavy!
15 Over-cooled (pressure, blow) at the side of the mold;
16 The speed is too low;
17 is blowing excessive water and oil in the trachea;
18 The cooling air nozzle is not used at the mouth of the blowing head to cause the blowing cold air to blow directly onto the bottle mouth.
Corrective measures:
1. Reduce core contact time;
2. Adjust fluttering movements, reduce air pressure or shorten fluttering time; re-correct funnel mechanism.
3. Reduce punch and die cooling;
4. Reduce the air pressure of the punch down;
5. Check the alignment of the die and make it consistent;
6. Tightening the core and core joints;
7. Replace the core locking plate;
8. Re-align the blow head arm, adjust the height properly or replace the blow head;
9. Delay blowing;
10 Replace the air blow core;
11 Reduce punch pressure and punching time;
12 Adjust core cooling;
13 shorten the blowing time;
14 Use suitable materials or apply jaws with suitable materials; adjust opening speed!
15 Reduce the cooling of the bottle mouth above the mould;
16 Appropriate increase in speed;
17 Release moisture and oil as much as possible, and if necessary, install oil-water separators on the air mains;
18 Use the inner cooling fan.
C: Mold Analysis:
1. The wear of the die joints wears, resulting in blowing air to the outside of the bottle mouth;
2. The blowing head is too shallow and it touches the bottle mouth;
3. The blowing head is too deep, causing the cone to bounce against the blowing head;
4. Die size is too large;
5. The cavity of the initial mold cavity is not enough;
6. The shape of the cavity of the primary mold is not suitable, so that the required stamping pressure is higher;
7. Punching port is too small;
8. The tip of the core is too long;
Corrective measures:
1. Replace the die;
2. Check the blowing head and modify the depth to the right;
3. Check the blowing head and modify the depth to the right;
4. Change to a smaller die;
5. Increase the initial mold cavity volume;
6. Modify the initial mold cavity design to make it easy to stamp;
7. Increase the size of the punching port;
8. Reduce the tip.
Note: The cracks generated on the side of the primary die are mostly straight and vertical cracks, and cracks generated on the side of the die are mostly accompanied by fracture marks. There are two ways to solve this problem: 1. Caused by cooling; 2 vibration caused by unreasonable mechanical action!
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