1、 Installation: lay a solid foundation and avoid safety hazards

Environmental Requirements

Installed in a ventilated and dry place, away from flammable and explosive materials, with a reserved operating space of ≥ 50cm around, avoiding direct sunlight or heat sources from baking the pump body.

The ground should be flat and sturdy, and the pump body base should be fixed with expansion bolts to reduce vibration during operation (excessive vibration can accelerate the wear of seals).

Pipeline connection

The feeding port is connected to the outlet of the hot melt glue cylinder of the hot melt glue machine, and the discharging port is connected to the glue gun or nozzle. The pipeline should use high temperature resistant (≥ 200 ℃) metal pipes (such as stainless steel) to avoid using plastic hoses (which are prone to softening and deformation).

Install high-temperature resistant sealing gaskets (such as silicone gaskets) at the pipeline interface and tighten them evenly with a wrench to prevent hot melt adhesive leakage (leaked high-temperature adhesive may cause burns or fire).

electrical connection

The power supply needs to match the rated voltage of the pump (commonly 220V/380V), and separate leakage protectors and overload protection devices should be installed. The grounding terminal must be reliably grounded (to prevent electric leakage from injuring people).

When connecting accessories such as temperature controllers and motor controllers, it is necessary to distinguish the positive and negative poles according to the wiring diagram to avoid reversing and burning the motor or sensor.

2、 Start up: Step by step, avoid sudden overload

Preheating preparation

Start the hot melt glue machine to preheat the glue cylinder, wait for the glue to completely melt (the temperature reaches the melting point of the glue+10-20 ℃, such as EVA glue usually 150-180 ℃), and manually discharge the glue to confirm that there are no particles or bubbles in the glue. Then turn on the preheating function of the pump (some pump bodies come with heating sleeves, which need to be preheated to the same temperature as the glue).

Check if the inlet valve is open and if the outlet pipeline is unobstructed (close the glue gun to avoid glue spraying when starting).

No load trial operation

Turn on the motor power, run it at the lowest speed (such as 100r/min) for 3-5 minutes, and observe whether there is any abnormal noise, leakage or vibration in the pump body (normally there should be no friction sound, and no glue leakage from the sealing part).

Slowly adjust the speed to the working range (usually 200-500r/min according to the required amount of glue), while opening the discharge valve to observe whether the glue output is continuous (there may be a small amount of bubbles in the initial stage, which is a normal phenomenon and should disappear after 1-2 minutes).

3、 Run: Real time monitoring to ensure stable output

parameter control

Keep the temperature of the melt adhesive stable (fluctuation range ≤± 5 ℃). If the temperature is too high, it will cause carbonization of the adhesive material (blocking the pump chamber), while if it is too low, the viscosity of the adhesive material will increase, increasing the load on the pump body (which may burn out the motor).

Adjust the speed according to the glue application requirements (the speed is proportional to the amount of glue) to avoid sudden and significant acceleration (sudden high pressure may cause pipe bursting). It is recommended that the speed adjustment range should not exceed 50r/min each time.

4、 Shutdown: Standardize operation and protect equipment

Normal shutdown

First, turn off the heating of the glue cylinder and keep the pump running until the glue is basically emptied (about 3-5 minutes) to avoid the glue from cooling and solidifying in the pump chamber.

Reduce the speed to the lowest, turn off the motor power, and finally cut off the main power. After the pump temperature drops to ≤ 50 ℃, wipe the residual adhesive on the surface of the pump body and pipeline with a clean cotton cloth.

Emergency shutdown

In case of leakage, abnormal noise, or motor smoking, immediately press the emergency stop button to cut off the main power supply. After the equipment cools down, troubleshoot the problem and do not disassemble the pump body at high temperatures (to prevent burns).

5、 Maintenance: Regular maintenance to extend lifespan

routine maintenance

Check daily whether the pipeline connections are loose and whether the seals show signs of aging (such as hardening or cracking).

Rinse the pump chamber with a specialized cleaning agent (such as hot melt adhesive cleaner) every week to remove residual adhesive residue (especially when replacing different types of adhesive, thorough cleaning is necessary to avoid mixing and deterioration).

Regularly replace components

Bearings: Check every 500 hours of operation and replace if severely worn (to avoid abnormal noise and vibration).

Seals: Replace them every 3 months or after 1000 hours of operation (seals age faster in high-temperature environments).

Gear/rotor: Check the meshing condition every 2000 hours and replace it promptly if there is wear or scratches (to ensure the accuracy of the adhesive output).