CJSQ-50 Hot Melt Adhesive Machine Repair and Maintenance

Maintenance and Repair of CJSQ-50 Hot Melt Adhesive Machine

                CJSQ-50

Parameter Description

Heating tank capacity: 5.0L

Maximum glue melting rate: 7Kg/H

Maximum operating temperature: 200 ℃

Air pressure range: 0.4-0.6Mpa

Size (L × W × H) 370mm × 575mm × 740mm

Weight: 43Kg

Maximum viscosity used: 12000 CPS

1、 Regular maintenance

Attention: Always wear safety gloves, goggles, and long sleeved work clothes to avoid exposing parts of the body to hot liquids

Hot melt adhesive burns, or surface burns from high-temperature components.

Attention: Loosen or lock the air pressure connector or connecting mechanism (such as removing the nozzle combination and insulation pipe/rubber guide pipe)

Before removing the connection between the two or the combination of the filter screens from the adhesive board, it is necessary to drain them beforehand

Press to avoid danger.

1. General maintenance

·Clean the interior of the power control box. During the cleaning process, please be careful not to loosen any wire connectors to avoid short circuits. Check the wire end connectors

Is it secure.

Note: Due to vibration and repeated heating and cooling of the machine, it can cause wire joints to loosen and cause short circuits.

·Check for any adhesive leakage around the joint between the insulation pipe/rubber guide pipe and the pneumatic needle valve nozzle.

·Check if there is any adhesive leakage at the connection between the insulation pipe/rubber guide pipe and the rubber circuit board. If there is any adhesive leakage, use a adjustable wrench to loosen the joint and check if the O-ring is

No damage, clean or replace it if necessary.

2. Cleaning the system

·The hydraulic system of this series of models must undergo regular inspection and cleaning to remove foreign objects or carbides formed by hot melt adhesive at high temperatures,

The cleaning steps can also be applied to replace the hot melt adhesive, and when the new hot melt adhesive is incompatible with the old hot melt adhesive in the glue barrel.

·Note: Some cleaning solvents that are not compatible with hot melt adhesives may form a paste or gel after mixing the two, which can cause problems that have already occurred

(such as blockage) becomes more severe, making it more difficult to handle. Therefore, before using cleaning solvents, it is best to mix a small amount of solvent with the hot melt adhesive sample to be cleaned,

Use it for cleaning work based on its results.

·Heat the hot melt adhesive machine to the operating temperature, start the nozzle assembly, and completely release the residual pressure inside the insulation tube and nozzle assembly.

·Place the receiving container at the connection between the insulation pipe/rubber guide pipe and the adhesive board, and below the nozzle assembly.

a. Use an adjustable wrench to remove the nozzle and start the air pressure pump to pump out the hot melt adhesive through the nozzle combination.

Attention: When disassembling the insulation pipe/rubber duct, it is necessary to ensure that the power plug has been removed, otherwise there may be a risk of electric shock.

b. Remove the hydraulic joint and power plug of the insulation pipe/rubber guide pipe from the combination of the self nozzle, and start the air pressure pump to make the hot melt

The adhesive is pumped out through the insulation pipe/guide hose.

c. Remove the insulation pipe/guide hose from the adhesive circuit board, start the air pressure pump to pump out the hot melt adhesive through the adhesive circuit board.

·After the hot melt adhesive inside the system is completely cleaned, turn off the air pressure pump.

·When loading new hot melt adhesive into the glue barrel, it must be noted that it does not contain foreign objects.

When the system temperature is in operation, adjust the system pressure to the operating pressure, start the air pressure pump, and pump the molten hot melt adhesive from the glue barrel to each device before flowing out into the receiving container at the bottom. Turn off the pneumatic pump.

Note: The best internal cleaning method for the hydraulic system is to circulate the molten hot melt adhesive in the barrel through the pneumatic pump, filter screen combination plate, insulation pipe/rubber guide pipe, and then return to

Melting glue bucket, this process lasts about 15 minutes.

·Refer to 5.3 to disassemble the filter screen assembly and clean it thoroughly.

·Disconnect the external power supply and reinstall the pressure connector and power plug of the insulation pipe/rubber guide pipe and nozzle combination.

·Restore external power supply to return the system to operating mode.

3. Cleaning nozzle combination

·When the filter combination is blocked or damaged by foreign objects, or when there is carbide formed by hot melt adhesive in the insulation pipe/rubber guide pipe and pneumatic needle valve nozzle combination, it can cause nozzle blockage.

The formation of carbides is mainly due to the heating of the hot melt adhesive to a temperature exceeding the specified temperature. In this case, it is sometimes necessary to replace the insulation pipe/rubber guide pipe and nozzle combination.

·Heat the nozzle combination to the specified operating temperature· Adjust the pressure of the nozzle assembly to the operating pressure, and start the nozzle assembly to release the residual internal pressure.

·Adjust the pressure of the nozzle assembly to zero, and remove the nozzle assembly from the insulation pipe/rubber guide pipe· Disassemble the nozzle assembly into a heating section and a glue spraying section,

Remove the filter device from it, check if the filter is damaged, and replace it if necessary. If it is only a blockage of some foreign objects, soak it in a cleaning solvent

Clean with a soft brush and then wipe clean with a cleaning cloth.

·Use an adjustable wrench to remove the nut from the adhesive part of the nozzle assembly. Remove the nozzle from the nut.

·Use a slender needle to penetrate the small hole of hot melt adhesive flowing out of the nozzle in the opposite direction to remove blocked foreign objects or carbides.

·Attention: Do not use a sharp drill bit to remove the nozzle hole, to avoid damaging the nozzle and causing uneven amount of hot melt adhesive sprayed from the nozzle.

·Attention: When cleaning the nozzle of the hot melt adhesive machine, please follow the following methods:

(1) Heat with a smokeless hot air gun and wipe clean with a clean cloth.

Or (2). Soak the nozzle in cleaning solvent and use ultrasonic cleaning if possible. Or (3). Soak the nozzle in an appropriate amount of chemical solvent.

·Reassemble the nozzle and nozzle assembly, and reassemble the heating and glue spraying parts together. The filter device must be installed before reassembly.

2、 Troubleshooting

When this model malfunctions, the cause may be in the mechanical and electrical parts. Therefore, the reasons for the malfunction and troubleshooting will not be separately described below.  Attachment Download