Precautions And Maintenance Methods for Glue Dispensing Machines

In precision industries such as electronic communications and automotive manufacturing, the potting process is a critical step to ensure product quality and stability. As the core equipment for executing this process, the standardized operation and meticulous maintenance of glue dispensing machines directly impact production efficiency and product yield. This article details the precautions and maintenance methods for glue dispensing machines to help you fully utilize equipment performance and extend its service life.

I. Precautions for Using Glue Dispensing Machines

1. Brief Introduction to Core Principles
Glue dispensing machines utilize a precision control system to achieve automatic mixing and quantitative dispensing of two-component adhesives (AB glue). The basic process is as follows: Inject components A, B, and cleaning fluid into their respective designated tanks -> Set parameters such as glue ratio and dispensing path via the touchscreen -> After starting, the three-axis robotic arm moves according to the program, the head motor drives the mixing tube to rotate at high speed, and the internal spiral blade thoroughly mixes the adhesive before dispensing -> Upon completion, execute the automatic cleaning program to remove residual adhesive.

2. Strictly Prevent "Silicone Poisoning" Phenomenon
Silicone is widely used in the electronics industry, but its catalytic curing system is very sensitive and prone to "poisoning," leading to non-curing or incomplete curing.

• Cause of Poisoning: The curing      of addition-cure silicone requires a platinum (Pt) catalyst. If the      adhesive comes into contact with organic compounds containing elements      such as Nitrogen (N), Phosphorus (P), or Sulfur (S) during the dispensing      process, it will react with the catalyst, deactivating it and preventing      the silicone from curing properly.

• Preventive Measures:

• Isolate Contamination Sources: Strictly       avoid contact between silicone and the aforementioned compounds during       operation. Simultaneously, avoid using products such as polyurethane,       epoxy resin, etc., that may contain harmful substances nearby when the       dispensing machine is operating with silicone.

• Thorough Cleaning: When       switching between different brands or types of silicone, the material       tank, adhesive pump, and the entire adhesive pipeline must be thoroughly       cleaned to prevent cross-contamination and poisoning caused by residues.

3. Daily Operation Specifications

• Test Production First: Before      large-scale production, always conduct small-batch tests to confirm the      glue ratio and curing effect meet requirements, avoiding batch defects due      to parameter errors.

• Monitor Air Supply: Regularly      check the air pressure source and drain moisture from the regulator filter      to ensure stable operation of pneumatic components, preventing moisture      from affecting adhesive performance or damaging the equipment.

• Adhesive Management: The      larger the volume of mixed adhesive, the faster the reaction and curing      speed. Allocate glue reasonably based on actual production needs to avoid      waste. For bubbles generated during mixing, utilize the equipment's vacuum      degassing function or let the mixture stand for 10-20 minutes to allow      bubbles to escape before use.

II. Maintenance Methods for Glue Dispensing Machines

Consistent maintenance is key to ensuring reliable equipment operation.

1. Daily Maintenance

• Clean Promptly: After each      use, the cleaning program must be executed immediately. Wipe all visible      parts, especially key components like the mixing tube and glue valve,      clean with recommended solvents such as alcohol to prevent residual      adhesive from solidifying and causing blockages.

• Maintain Lubrication: Regularly      apply machine oil or grease to frequently moving parts of the equipment,      such as guide rails and lead screws, to maintain good lubrication and      reduce wear.

• Power Off for Energy Saving: When      the equipment is out of service for extended periods, unplug the power.      This not only saves energy but also effectively protects the electrical      system and extends its service life.

2. Regular and Deep Maintenance

• Pipeline Cleaning and Adhesive Change: Deep cleaning is necessary when changing the type of      adhesive. The operational procedure is: Close the supply valve -> Open      the discharge valve to empty residual adhesive -> Close the discharge      valve -> Pour in dedicated cleaning solvent -> Start the equipment      and circulate the solvent through the entire pipeline according to the      normal operation method until completely clean.

• Comprehensive Wiping: Regularly      perform a comprehensive wipe-down of the machine's surface and interior to      remove dust and stains, maintaining equipment cleanliness, which aids heat      dissipation and operational monitoring.

• Empty Adhesive Completely: If      the equipment is planned to be idle for a long time, be sure to completely      drain all adhesive from the system and perform a thorough cleaning. Never      allow adhesive to remain and solidify inside the equipment, as this will      cause severe blockages and significantly increase repair difficulty and      costs.

Standardized operation and meticulous maintenance are the cornerstones for ensuring the stable and efficient operation of glue dispensing machines and creating sustained value for enterprises. Hollysys Automation not only provides high-performance automated dispensing solutions but is also committed to offering comprehensive equipment management support to help customers achieve lean production.HOLS Automation has deep expertise in the field of industrial automation, providing customers with various precision automated assembly production lines, including glue dispensing machines, and comprehensive technical support and services.