1、 No glue or insufficient glue output

1. Installation problem of glue stick
   • Inspection contentConfirm that the glue stick is correctly placed at the heating head feed inlet to ensure it can melt and flow out.
   • SolutionReinstall the glue stick or replace damaged components.
2. Heating head blockage
   • Inspection contentThe heating head is the key part for melting the glue stick. If it is blocked by dirt or residue, it will cause the glue to not come out.
   • SolutionClean the heating head or replace damaged components.
3. Conveyor malfunction
   • Inspection contentThe conveyor is responsible for transporting the glue stick from the feeding port to the heating head. If there is a malfunction, too loose, too tight, or foreign objects get stuck, it will affect the glue dispensing effect.
   • SolutionCheck the working condition of the conveyor, clean up debris or adjust the tightness.
4. Temperature control system malfunction
   • Inspection contentThe temperature control system can ensure a constant temperature of the hot melt glue machine. If there is a malfunction, it is likely to result in failure to dispense glue.
   • SolutionCheck whether the temperature controller, fuse, temperature sensing wire and other components are damaged, and replace them in a timely manner.
5. Hot melt hose and melting tank heating issues
   • Inspection contentIf the hot melt hose and melting tank are not heated or not heated enough, it will also affect the adhesive effect.
   • SolutionCheck if the heater, temperature controller, etc. are damaged and promptly repair or replace them.
6. Filter clogged
   • Inspection contentAfter removing the hose connector and running the machine, if there is no glue output or the glue output is significantly reduced, it may be due to the blockage of the melt tank filter screen by carbides or other impurities.
   • SolutionClean or replace the filter screen, and be careful not to come into contact with solvents other than the cleaning solution of the glue machine when removing the "O" ring and PTFE ring, in order to avoid damage and pressure relief or glue leakage.

2、 Unstable glue dispensing

1. Filter clogged
   • Inspection contentBlockage of the filter screen can lead to uneven adhesive size.
   • SolutionClean or replace the filter screen.
2. The motor is not running properly
   • Inspection contentUnstable operation of the motor can affect the glue dispensing effect.
   • SolutionCheck the motor status and repair or replace it if necessary.
3. Improper adjustment of reflux valve
   • Inspection contentImproper adjustment of the reflux valve can lead to a decrease in dispensing pressure or unstable dispensing.
   • SolutionAdjust the reflux valve to the appropriate position.
4. The rubber drum is clogged with impurities from the filter screen
   • Inspection contentIf the rubber bucket is clogged with impurities from the filter screen, it will affect the effectiveness of the glue dispensing.
   • SolutionClean the impurities in the rubber drum and filter screen.
5. Gun body malfunction
   • Inspection contentGun body malfunction can lead to unstable or no glue dispensing.
   • SolutionCheck the condition of the gun body and repair or replace it if necessary.
6. The heating system of the glue machine malfunctions or the hot melt adhesive does not reach the operating temperature
   • Inspection contentMalfunctions in the heating system of the glue machine or the hot melt adhesive not reaching the operating temperature can affect the glue dispensing effect.
   • SolutionCheck the heating system to ensure that the hot melt adhesive reaches the operating temperature.

3、 Abnormal operation of equipment

1. Abnormal noise
   • Inspection contentAbnormal noise during equipment operation may be caused by bearing wear, insufficient lubrication, loose transmission components, or motor failure.
   • SolutionNecessary lubrication or replacement of bearings; Tighten all transmission components; Check the status of the motor and repair or replace it if necessary.
2. Abnormal display on the control panel
   • Inspection contentThe control panel display is abnormal, and the machine cannot start or run normally, which may be caused by sensor failure.
   • SolutionCheck and calibrate the sensor to ensure its proper functionality.

4、 Other common questions

1. Hot melt adhesive carbonization
   • Inspection contentExcessive temperature in the glue cylinder, carbonization on the side wall of the glue cylinder, oxidation of hot melt adhesive or large temperature control range, and loss of control may lead to carbonization of the hot melt adhesive.
   • SolutionFill the glue tank with glue according to the technical specifications; Rubber cylinder cover; Repair or replace temperature control components; Reduce the temperature.
2. Hot melt adhesive gel
   • Inspection content: Hot melt gel may be caused by mixing, overheating or instability of two immiscible adhesives.
   • SolutionCleaning the glue tank, standardizing the replacement of glue, and finding suppliers; Reduce temperature, clean the rubber cylinder, and find suppliers; Clean the rubber cylinder and find a supplier.
3. There are bubbles in the hot melt adhesive
   • Inspection contentFailure to properly vacuum hot melt adhesive or mismatch between production process and packaging may result in bubbles in the hot melt adhesive.
   • SolutionContact the supplier and replace the adhesive.