Fault phenomenon

Cause of failure

terms of settlement

Composite roll and preheating roll cannot be started

1. The emergency stop button is locked
2. Misoperation, start the host directly.
3. The transmission part and machinery are stuck.

1. Reset all emergency stop buttons
2. First press prepare, then press the main engine to start, and then press the speed up and down button.
3. Turn the speed wheel by hand to find out the fault point of the transmission part.

The composite roller or preheating roller cannot reach the set temperature

1. The protective circuit breaker is not closed
2. A thermal power equivalent tube was burnt out.
3. Poor line contact.

1. Switch on the protection circuit breaker
2. Replace the heating tube.
3. Check the control circuit or main circuit with a multimeter to find out the fault point and lock the bolt.

The oven temperature can not reach the set temperature

1. The set temperature is lower than the ambient temperature.
2. Improper control of air inlet and exhaust valves
3. The temperature controller is damaged.
4. Thermocouple damage or poor contact.
5. Improper selection of heating switch.
6. The heating tube is damaged.

1. The set temperature must be higher than the ambient temperature.
2. Adjust the suitable opening of inlet and exhaust valves.
3. Replace the temperature controller.
4. Replace the thermocouple, the new wiring is reliable.
5. Select the appropriate heating switch to recombine
6. Replace the heating tube

A tension is not working properly

1. The inflation shaft is not inflated.
2. Air leakage of air expansion shaft
3. Air expansion shaft drive gear slipping.
4. The core of the base material is too large, and its tension performance is poor.
The mechanical transmission is jammed.

1. New inflation of the inflatable shaft.
2. Repair or replace the inflatable shaft.
3. Lock the bolt of pneumatic expansion shaft transmission gear.
4. Rewind the substrate.
5. Check the meshing clearance and flexibility of the gear.

The conveying guide roller in the drying channel does not rotate

1. The belt falls off

1. Reassemble the belt and adjust the tension pulley.

The pressure on the left and right of the cot is uneven, and there is a gap in the pressing

1. Improper adjustment of cylinder throttle valve.
2. The throttle valve of the cylinder is dirty and blocked, and the air source contains water.
3. Improper adjustment of working pressure.

1. Readjust the throttle valve of the cylinder.
2. Replace the throttle valve and discharge the residual water from the air tank every shift.
3. Adjust the appropriate working pressure.

Wrinkling of substrate during operation

1. The tension of the substrate is uneven.
2. The tension is too high.

1. Adjust the adjusting roller to balance the tension between the left and right sides of the membrane.
2. Adjust the proper working pressure.

After the composite film product is drawn, the opening of the bag is rolled inward

1. The thickness of bottom film is too thin.
2. The unwinding tension of bottom film is too high.
3. The working temperature of the composite roller is too high, and the bottom film is hot deformed and contracted.

1. If the bottom film is more than 50 ч m, it will not be produced.
2. The unwinding tension of the bottom film should be as small as possible, as long as the bottom film is flat and wrinkle free.
3. Adjust the suitable working temperature of compound roller.

There are bubbles in dry composite membrane products

1. Mix with air during mixing.
2. The ambient temperature is too high.
3. Misoperation of glue pouring, the glue flushed down.
4. The glue of diaphragm pump is too urgent.

1. Pump the mixed glue with a vacuum pump, fully degassing and stirring.
2. Heat the glue and reduce the linear velocity of the composite properly.
3. Pour the glue nail slowly along the edge.
4. Adjust the air volume of diaphragm pump and pump glue flows out at a constant speed.

Dot blocking of coating anilox roll1. The anilox roller was not cleaned in time after work.
2. The residual glue has been crosslinked and cured.

1. Clean the anilox roller immediately after work.
2. Soak in ethyl acetate, clean with uranium brush, soak with NaOH, and clean with copper brush.