What factors can affect the dispensing effect of a glue machine?
Publisher: Administrator Date: 2025-04-30
The key factors that affect the dispensing effect of the dispensing machine can be summarized into the following six categories:
1、 Equipment components and hardware factors
Needle specifications and wear
The inner diameter of the needle directly affects the amount and accuracy of the adhesive, and the matching specifications need to be selected according to the type of adhesive. Needle wear can cause uneven glue points or wire drawing, and needs to be replaced regularly.
Vacuum suction function
The vacuum suction valve can prevent glue dripping and drawing, and it is necessary to adjust the suction strength reasonably to balance the control of glue volume.
Equipment stability
Mechanical vibration or air pressure fluctuations can cause uneven dispensing, and it is necessary to ensure the overall structural stability of the equipment and the accuracy of the air pressure system.
2、 Adhesive characteristics and treatment
Viscosity and fluidity
If the viscosity is too high, it is easy to pull the glue thread, and if it is too low, it is easy to bleed. It is necessary to choose a suitable viscosity glue according to the application scenario.
bubble control
Bubbles in the glue can cause intermittent or empty dispensing, so it is necessary to thoroughly exhaust before dispensing and avoid mixing air during storage.
Curing conditions
The curing of glue should follow the temperature curve. High temperature curing can improve strength, but it needs to be coordinated with the environmental temperature and humidity.
3、 Process parameter setting
Air pressure and speed matching
Excessive air pressure leads to glue overflow, while insufficient pressure causes interruption; The operating speed needs to be adjusted in coordination with the air pressure to ensure uniform adhesive volume.
Glue dispensing quantity and time control
The dispensing time directly determines the amount of glue, and the diameter of the glue point should be half of the product spacing, which needs to be adjusted in conjunction with the fluidity of the glue.
Distance between needle and working surface
Contact dispensing requires distance calibration, while non-contact spraying technology can adapt to larger height errors.
4、 Environmental and operational factors
Temperature and humidity influence
Excessive or insufficient environmental temperature and humidity can alter the viscosity and curing speed of the adhesive, and it is necessary to maintain constant temperature and humidity conditions.
Fixture design error
When the product size or fixture error exceeds the equipment accuracy, flexible fixtures or visual positioning compensation should be used.
Operating specifications
Personnel need to receive professional training, familiarize themselves with parameter adjustment, equipment maintenance, and exception handling procedures to reduce human errors.
5、 Technical adaptation plan
The use of non-contact jet dispensing combined with computer vision positioning can effectively cope with product size fluctuations and reduce the accuracy dependence of contact dispensing. At the same time, regularly clean the pipelines, replace worn parts, and use tools such as viscometers to monitor the adhesive
Water state can systematically improve the yield rate.
The above factors need to be comprehensively regulated through equipment calibration, process optimization, and environmental management to form a closed-loop control, in order to achieve stable and efficient dispensing effects.
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