How the Right Nozzle Selection Affects Hot Melt Consumption
Nozzle is the final point, which is transformed into the production part of the gramade and pattern in the hot melt system. Orifis diameter, length, end geometry and number of holes; affect the flow, shape of the waist, cut and pressure requirement. The correct nozzle can reduce consumption, but the connection should be selected together with safety.
Why can big orifis be expensive?
Larger hole can form the same trigger time and higher flow in pressure. If the operator does not change the movement, it thickens from the requirement of bead, stones from the edges and extends the cooldown time. In order to avoid straining or growing the nozzle, non-adaptive consumption increase and uncontrolled pattern can lead.
Risk of very small orific
Small nozzle can offer the advantage of low grammage; but if the product viscosity, filtering and system pressure is not suitable, frequent clogging, tailing or irregular flow is observed. Increased temperature to protect the flow can grow the risk of char and surface damage. The smallest nozzle should be aimed at the most suitable nozzle, not stable running.
Geometry and application pattern
Flat bead targets different surfaces of angle nozzle, multiple holes, slot or spray tip. The correct location of the adhesive comes before reducing the amount. Short bead or dot in carton closure; spray on wide surface; angled end can be considered suitable on narrow channel and edge. Nozzle-piece distance and movement way are also part of standard.
Grammar optimization with trial
Measuring gram/particle and bond result in the current nozzle. Candidates are tested under the same temperature, pressure and cycle; then the parameters are optimized controlled. Debi, pattern repeat, clogging frequency, spinning and breaking mode are evaluated together. Gain should be verified not only in the first shift, not for enough production time.
Application control list
- Save gram/piece and nozzle code available.
- Match orifice with product viscosity.
- Fix nozzle-piece distance.
- Monitor strain and cut quality.
- Select the lowest stable grammar verified by connect test.
Conclusion
The correct nozzle gives the adhesive in the correct amount and repeatable way to the target area. Sarprice gain comes from matching and verification, not from orifis.
Manstechnic approach
Manstechnic optimizes nozzle selection with adhesive, equipment pressure, pattern and bond test.