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What are the precautions when replacing glue in a PUR hot melt adhesive machine?
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Release time:
2024-09-23 15:02
PUR hot melt adhesive has excellent bonding strength on porous materials such as wood, leather, fabric, paper, ceramics, and on smooth surfaces like plastics
PURHot melt adhesive has excellent adhesion to porous materials such as wood, leather, fabric, paper, ceramics, and smooth surfaces like plastics, metals, glass, and rubber. Under conditions that suppress chemical reactions, it is heated and melted into a fluid for coating.
PURIt is a moisture-reactive hot melt adhesive that reacts with moisture in the air after heating and bonding; once the reaction is complete, it becomes irreversible (i.e., it will not melt again upon heating). It is relatively resistant to high and low temperatures.PURIts characteristics include high cohesive strength and strong bonding strength. It withstands high and low temperatures, with performance far exceeding that of ordinary hot melt adhesives.
So,PURWhat precautions should be taken when changing glue in a hot melt adhesive machine?
1,PURWhen the pressure plate of the hot melt adhesive machine is detached from the barrel, the air pressure should be gradually increased from low to high. Under no circumstances should high-pressure gas be used directly to detach the barrel from the hot melt adhesive machine to avoid accidents.
2, cleanPUR. When cleaning the heating pressure plate of the hot melt adhesive machine, staff must wear specialized heat-resistant protective clothing for hot melt adhesive machines and heat-resistant gloves. Skin contact with the hot melt adhesive barrel or molten hot melt adhesive and other high-temperature parts must be avoided to prevent burns.PUR热熔胶以及发热盘等高温部分，避免烫伤。
3,PUR. After detaching the pressure plate of the hot melt adhesive machine from the barrel, any residual hot melt adhesive on the pressure plate must be cleaned immediately. When cleaningPUR. When cleaning the heating glue plate of the hot melt adhesive machine, no hard tools should be used to prevent scratching the Teflon coating on the pressure plate. The time for cleaning residual glue should not exceedPUR热熔胶机发热胶盘时，不能使用任何硬质工具，防止划伤压盘特氟龙涂层。清理PUR.10.
4, after cleaningPUR. After cleaning is completed on the pressure plate of the hot melt adhesive machine, it should be immediately pressed into a new barrel of hot melt adhesive to avoid prolonged exposure of the pressure plate to air. When pressing into a glue barrel, a small amount of silicone oil can be applied on the sealing ring of the pressure plate for lubrication to protect its use.PUR热熔胶桶内，避免长时间让压盘裸露于空气中。将PUR.
5, whenPUR. After pressing into a new polyurethane glue barrel with a heated pressure plate of the hot melt adhesive machine, open the overflow valve to expel any residual air in the glue barrel and ensure that any air-bubbled hot melt adhesive is completely expelled to avoid air-containing polyurethane hot melt adhesive flowing into pump body and throat pipe.PUR热熔胶排除干净，避免带空气的聚氨酯热熔胶流入泵体和热熔胶机喉管内。
., after replacingPUR. After changing out for new hot melt glue, you must wait at leastPUR. The hot melt adhesive machine must heat for at least20minutes before starting up gear pumps and motors; if you start them immediately after changing out glue it may damage gear pumps in glue machines and reduce their lifespan.
Jingtai Equipment Manufacturing Co., Ltd. is a high-tech enterprise specializing in research and development, production, sales and technical consulting for intelligent spraying equipment for hot-melt adhesives.
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