Pur polyurethane hot melt glue machine features.
Due to the special nature of pur polyurethane hot melt adhesive machine, pur polyurethane hot melt adhesive is also known as wet curing reactive polyurethane hot melt adhesive, also known as wet hardening reactive polyurethane hot melt adhesive, referred to as pur hot melt adhesive, in hot melt use such as contact with water vapor in the air will react to cure, so in the melting and use of pur hot melt adhesive machine needs to be completely isolated from the air, pur hot melt adhesive machine is designed for the application of polyurethane hot melt adhesives. What you may need to know about pur polyurethane hot melt glue machine. After understanding the characteristics of pur polyurethane hot melt adhesive, it will be easier to understand the following maintenance.
Pur polyurethane hot melt glue machine working principle.
The biggest difference between polyurethane hot melt adhesive machine and ordinary hot melt adhesive machine is that the entire hot melt glue coating process is completely isolated from the air, ordinary hot melt adhesive machine is from the bottom up to dissolve the hot melt adhesive, pur hot melt adhesive machine is from the top down to dissolve the polyurethane pur hot melt adhesive, so one of the core components of pur hot melt adhesive machine is the hot melt adhesive platen heating body.
Pur hot melt glue machine to change the glue when the precautions.
A, In cleaning pur polyurethane hot melt glue machine, must first make the hot melt glue heating disk and pur hot melt glue barrel from, pur polyurethane hot melt glue barrel and pur hot melt glue machine heating disk from, should be in the case of maintaining the pressure in the lift cylinder, cut off all power.
B, Polyurethane hot melt glue machine in the barrel off, filling the air pressure should be slowly pressurized from small to large, under no circumstances allow the direct use of high-pressure gas directly off the barrel, to avoid accidents.
C, When pur polyurethane hot melt glue machine heat plate platen and polyurethane hot melt barrel off, before cleaning pur hot melt glue residual glue, must pass pur hot melt glue machine platen on the special mechanism to close the channel between the platen and the pump body to prevent curing.
D ,Clean pur hot melt glue machine heating platen, staff must wear special high temperature protective clothing, with high temperature gloves, do not make skin contact with hot melt glue barrel, molten pur hot melt glue and heating plate and other high-temperature parts to avoid burns.
E, Pur hot melt glue machine in the barrel off, the best way to 5 gallons of hot melt glue barrel filled with dry nitrogen, avoid the direct use of undried compressed air, if you need to fill the compressed air, compressed air needs to be thoroughly dried. And often check the use of desiccant.
F, Pur polyurethane hot melt glue machine in the hot melt glue barrel from, must immediately and thoroughly clean up the hot melt glue platen residual pur hot melt glue, in the clean up pur hot melt glue machine heating glue plate, can not use any hard tools to prevent scratching the platen Teflon coating.
G, For the special structure of pur hot melt adhesive machine platen cleanup, because of the special structure pur hot melt adhesive machine heating plate can not be thoroughly cleaned in a short period of time residual pur polyurethane hot melt adhesive, then in the cleanup of residual pur polyurethane hot melt adhesive must use dry nitrogen gas protection, and clean up the residual adhesive time shall not exceed 10 minutes, shall not use any hard tools to clean up pur hot melt adhesive machine heating plate.
H、After the pur hot melt adhesive machine pressure plate is cleaned, the pressure plate should be pressed into a new pur hot melt adhesive barrel immediately to avoid leaving the pressure plate exposed to the air for a long time. When pressing the hot plate into the barrel, the size of the air pressure of the lifting cylinder should be from small to large, do not use high pressure gas directly to prevent accidents and pay attention to the safety of the operator.
I、When pressing the pur hot melt glue machine into the barrel, you can properly apply a small amount of silicone oil on the seal of the pressure plate to do lubrication, so that lubrication between the pressure plate and the barrel can be produced to protect the use of the seal.
J、When pur hot melt glue machine fever platen pressed into the new polyurethane glue barrel, should open the overflow glue valve, thoroughly discharge the residual air in the glue barrel, and pur hot melt glue with air bubbles to exclude clean, to avoid the flow of polyurethane hot melt glue with air into the pump body and hot melt glue machine throat.
K, Pur hot melt glue machine pressure plate placed in the polyurethane hot melt glue barrel and the air will be excluded, lock the overflow glue valve, at this time you can properly increase the air pressure in the stroke cylinder to make the work more smoothly.
L , After the change of pur polyurethane hot melt glue, you must wait for the pur hot melt glue machine heating at least 20 minutes before starting the gear pump and motor, such as immediately start the gear pump and motor will cause damage to the polyurethane gear pump, reducing the service life of the pur hot melt glue machine.
