How to Choose the Right Glue Dispensing Machine？
Selecting the appropriate glue dispensing machine requires comprehensive consideration of various factors, including production requirements, adhesive properties, and precision requirements. The following provides a detailed selection guide from multiple perspectives:
1. Clarify production requirements and scenarios
Dispensing volume and efficiency
If micro-dispensing is required (such as precision encapsulation of electronic components), a high-precision micro-dispensing machine (such as a screw-type or jet-type machine) should be selected;
For large-scale mass production, prioritize high-speed dispensing machines compatible with automated assembly lines (e.g., multi-head dispensing machines, turntable-type dispensing machines).
Dispensing Shape and Path
For simple shapes such as dots, lines, and circles, desktop-type dispensing machines can be used;
For complex three-dimensional trajectories (e.g., irregular coatings on circuit boards), dispensing machines with three-axis/five-axis motion platforms are required.
2. Analysis of Adhesive Properties
| Adhesive Types | Key characteristics | Suitable dispensing machine types | Precautions |
| Water-based adhesive / Low-viscosity adhesive | High fluidity, prone to dripping | Pneumatic dispensing machine | Control air pressure stability to avoid excessive dispensing. |
| High-viscosity adhesive (e.g., silicone, epoxy resin) | High viscosity, poor fluidity | Screw-type and plunger-type dispensing machines | A heating device may be required to soften the adhesive. |
| Two-component adhesive (AB adhesive) | Requires mixing in specific proportions before curing | Plunger pump two-component dispensing machine (with mixing tube system) | Ensure accurate mixing ratios to avoid poor curing. |
| Particle-filled adhesive (e.g., silver paste) | Contains solid particles, prone to clogging | Plunger-type dispensing machine with large-diameter needle Key characteristics | Clean the needle regularly to prevent particle buildup. |
3. Dispensing accuracy
When accuracy requirements are ≤0.1mm, choose a dispensing machine driven by a servo motor; for general applications, a stepper motor model can be selected.
Repeatability accuracy
For electronic component dispensing, accuracy must be ≤±0.02mm; for general industrial applications, ≤±0.1mm is sufficient.
Dispensing Speed
For high-speed applications (e.g., LED packaging), a speed of ≥500 dots per minute is required; for general applications, 100–300 dots per minute is sufficient.
4. Consider automation and compatibility
Degree of automation
Manual loading scenario: Choose a semi-automatic dispensing machine (requires manual placement of workpieces);
Fully automated production line: Fully automatic dispensing machine integrated with visual positioning (CCD) and automatic loading and unloading.
Compatibility and expandability
Supports multiple adhesive types and needle types (such as stainless steel and PTFE);
Can be connected to a PLC control system or MES system for easy production line integration.
4. Consider automation and compatibility
Degree of automation
Manual loading scenario: Choose a semi-automatic dispensing machine (requires manual placement of workpieces);
Fully automated production line: Fully automatic dispensing machine integrated with visual positioning (CCD) and automatic loading and unloading.
Compatibility and expandability
Supports multiple adhesive types and needle types (such as stainless steel and PTFE);
Can be connected to PLC control systems or MES systems for easy production line integration.
After-sales service and maintenance
Prioritize manufacturers that provide commissioning training and regular maintenance to ensure long-term stable operation of the equipment.
Confirm the replacement cost and supply cycle of wear parts (such as seals, needles, and pump bodies).
6. Field testing and case references
Sample testing: Conduct test spot applications using actual adhesives and workpieces to observe the shape of the adhesive spots, consistency, and equipment stability.
Industry cases: Refer to the equipment selection experience of similar companies (such as the sticker gift industry, PCB, SMT electrical and electronic equipment, automotive parts, and motorcycle parts) to reduce selection risks.
Summary: Core Decision-Making Process
1. Identify dispensing scenarios (product type, production volume) → 2. Analyze adhesive properties → 3. Determine precision and speed requirements → 4. Match automation solutions → 5. Budget and after-sales evaluation → 6. On-site testing and verification.