How do I choose a nozzle or discharge for water-based paint?
Choose the outlet around product behaviour, the smallest pack opening and the clean cutoff required. For water-based paint, the nozzle must handle is viscous, pigment-bearing and can settle or dry on wetted parts while entering or approaching cans, tubs or pails without splash, blockage, foam or pack contact.
What should I check first?
Record the machine state and the finished result before changing settings. This helps identify where control is first being lost.
- Measure the smallest internal opening and shoulder clearance of cans, tubs or pails.
- Record the largest particle, string length or foam tendency where relevant.
- Check whether bottom-up filling or positive shutoff is required.
- Record ten consecutive fills by weight and note the product temperature, density or batch condition.
- Confirm the product supply remains stable at minimum and maximum hopper or tank levels.
Why is this production problem happening?
Work from the evidence and change one variable at a time. These are the most relevant causes to investigate first.
- The bore is too small or too large for the product and required flow.
- The nozzle closes too slowly or retains product after cutoff.
- Pack tracking allows the opening to miss the nozzle centre.
- The dosing principle is unsuitable for viscosity, particles, aeration or accuracy.
- Product conditions are changing during the run.
How can I correct or improve it?
Make a controlled change, repeat the same measurement and compare the result before moving to the next adjustment.
- Trial alternative bore, tip and shutoff geometries.
- Control nozzle height and motion against the actual pack.
- Add drip capture only after the root cutoff issue has been addressed.
- Stabilise product temperature, mixing and supply before retuning.
- Test a representative product and pack matrix across the full fill range.
What should I send Lancing?
The most reliable recommendation is based on representative production materials and a measurable acceptance result.
- Representative sample of Water-based paint
- All relevant cans, tubs or pails
- Target fill and tolerance
- Required accepted output
- Photographs or video of the current process
- Product name and a sample or SDS where relevant
- Viscosity, temperature, particles, foaming and density
Which applications does this answer cover?
More quick answers about this problem
What should I check first for water-based paint?+
Measure the smallest internal opening and shoulder clearance of cans, tubs or pails.
Why does this problem happen with water-based paint?+
The bore is too small or too large for the product and required flow.
How can I improve or correct the problem with water-based paint?+
Trial alternative bore, tip and shutoff geometries.
Which part of the production line does this question relate to?+
This question relates primarily to filling & dosing. It may also be affected by upstream product or pack supply and by downstream handling, so check the full production sequence rather than one machine in isolation.
What should I send when asking for a machinery recommendation?+
Send Representative sample of Water-based paint; All relevant cans, tubs or pails; Target fill and tolerance; Required accepted output. Representative production samples and a measurable acceptance target are normally more useful than a catalogue description alone.
Explore the relevant Lancing machinery options
Review suitable equipment and application guidance, then request a recommendation based on your product, pack and required accepted output.
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