There are many manifestations of poor cardboard adhesion, and there are 8 of the most common. When the cardboard has poor adhesion, the specific manifestations should be observed first, and then the reason should be found. The key is to prescribe the right medicine. This article will share 8 cases of poor cardboard adhesion and corresponding solutions!
1. No glue or obvious lack of glue on the glued surface
Reason 1: Operation error. a. The glue disc is broken. b. The amount of glue does not match the paper quality.
Cause 2: Equipment adjustment problem. a. The ballast roller of the paster is not pressed or the gap is too large. b. The gap between the gluing roller and the tile roller of the single-sided machine is too large.
(1) Adjust the reasonable glue formula, control the temperature and viscosity of the glue, and avoid the glue blocking the hose and causing the glue disc to break.
(2) Form various paper gluing systems according to their own materials, and train operators.
(3) Form a calibration system to regularly calibrate the gap between the ballast roller and the gap between the glue roller and the glue roller, and form a standard.
2. There is glue, but the glue surface is white
Reason 1: Operation error, the temperature does not match the gelatinization temperature of the glue. For example, the vehicle speed is too fast, the steam pressure is too low, etc.
Reason 2: Due to the weather, the glue formula did not adjust the gelatinization temperature in time.
Reason 3: The steam pipe valve is abnormal and the drainage is abnormal, and the condensate is not discharged in time.
(1) Form its own glue formula system to cope with different climatic conditions.
(2) Establish an inspection system and check the corresponding pipe valves and steam recovery system every day.
3. There is glue, but it is golden yellow with crystals
Reason: Excessive glue borax.
Adjust the amount of borax.
Four, there is glue, but it shows a light yellow watermark
Reason: The viscosity of the glue drops and the dynamic solid content is low.
Improve the stability of the glue, and the viscosity is stable within 3 seconds.
5. There is glue, but the glue is misplaced
Reason 1: The facial paper generates a lot of static electricity when the hot plate is running, and the adsorption is too large.
Reason 2: The double-sided machine has insufficient ballast force or the surface of the conveyor belt is worn and caused to slip.
(1) Use methods to remove static electricity, such as spraying anti-static liquid, sticking tape, cardboard overheating board, etc.
(2) Replace the conveyor belt.
Segmental degumming appears in the middle layer of six and five layers of cardboard
Reason: The ballast roller at the paper inlet of the double-sided machine jumped too much, and the vibration of the conveyor belt caused secondary adhesion of the cardboard.
Check whether the ballast roller bearing at the paper inlet is damaged.
Seven, three-layer cardboard edge degumming of high-resistance facial paper
Reason: The edge of the tissue paper is overheated in the drying tunnel, which causes the edge glue to gelatinize in advance.
(1) Adjust and advance the joint point of each layer of single tile at the opening of the drying tunnel.
(2) Adjust the temperature configuration of the drying tunnel, from low to high.
(3) Configure two glue formulas for the pasting machine.
Eight, there are obvious differences between the driving surface and the driving surface
Reason 1: The lifting mechanism of the double-sided machine drying bed caused inconsistent pressure on both sides.
Reason 2: The ballast pressure of the double-sided machine is inconsistent.
(1) Check and calibrate the gap of the ballast of the double-sided machine in time.
(2) Check and calibrate the horizontal position of the drying bed in time.