Pending
Tapered Tips For Greater Adhesive Accuracy
Intertronics, together with their technology partner Fisnar, have successfully addressed one of the factors affecting the accuracy of dispensing high viscosity fluids with standard parallel-sided dispensing needles. Standard stainless steel needles have a steep pressure restriction at the part of their cross-section where the needle joins the hub, leading to a high pressure requirement to generate flow and a high residual pressure in the needle when the feed pressure is cut – leading to continued “oozing” from the needle tip.
These two factors restrict both free flow and accuracy of deposition. Fisnar’s solution, now available from Intertronics, is a range of tapered dispensing needles, carefully designed to reduce the post-dispensing ooze otherwise experienced when applying high-viscosity fluids with enhanced pressure requirements.These tapered tip needles relieve the ramp up in pressure normally required to overcome the considerable “drag” or resistance to flow, of viscous liquids in parallel needles.
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