Vacuum nozzle having back-pressure release hole
View Patent ↗A pick-and-place vacuum nozzle including a a nozzle body, a vacuum chamber within the nozzle body, a cavity formed in a lower surface of the nozzle body below the vacuum chamber, wherein the cavity is shaped to hold a head gimbal assembly, a back pressure relief hole passing through the nozzle body and connected to the vacuum chamber, the back pressure relief hole communicating with an exterior of the nozzle body, wherein a diameter of the back pressure relief hole is between 0.5 mm and 1 mm. The backpressure relief hole prevents light parts from sticking to the nozzle tip after vacuum is no longer applied.
1. A vacuum nozzle, comprising:
a nozzle body;
a vacuum chamber within the nozzle body;
a cavity formed in a lower surface of the nozzle body below the vacuum chamber, wherein the cavity is shaped to hold a head gimbal assembly;
a back pressure relief hole passing through the nozzle body and connected to the vacuum chamber, the back pressure relief hole communicating with an exterior of the nozzle body;
wherein a diameter of the back pressure relief hole is between 0.5 mm and 1 mm.
2. The vacuum nozzle of claim 1 , further comprising:
a vacuum port passing through the body and connected to the vacuum chamber.
3. The vacuum nozzle of claim 1 , further comprising:
a nozzle tip disposed in the lower surface of the nozzle body proximate to the cavity and connected to the vacuum chamber.
4. The vacuum nozzle of claim 1 , wherein the diameter of the back pressure relief hole is between 0.7 mm and 0.9 mm.
5. A method, comprising:
picking up a head gimbal assembly using a cavity by applying a vacuum to a vacuum chamber within a vacuum nozzle body, the cavity being shaped to hold the head gimbal assembly and connected to the vacuum chamber;
ceasing to apply the vacuum to the vacuum chamber; and
releasing the part by allowing pressure in the vacuum chamber to increase by gas entering a back pressure relief hole passing through the nozzle body and connected to the vacuum chamber, the back pressure relief hole communicating with an exterior of the nozzle body;
wherein a diameter of the back pressure relief hole is between 0.5 mm and 1 mm.
6. The method of claim 5 , wherein the vacuum is applied using a vacuum port passing through the body and connected to the vacuum chamber.
7. The method of claim 5 , wherein the diameter of the back pressure relief hole is between 0.7 mm and 0.9 mm.
8. A vacuum nozzle; comprising:
a nozzle body;
a vacuum chamber within the nozzle body;
a cavity formed in a lower surface of the nozzle body below the vacuum chamber, wherein the cavity is shaped to hold a head gimbal assembly; and
a means for allowing a pressure inside the vacuum chamber to increase after discontinuation of application of a vacuum to the vacuum chamber, wherein the means for allowing a pressure communicates with an exterior of the nozzle body;
wherein a diameter of the means for allow a pressure is between 0.5 mm and 1 mm.
9. The vacuum nozzle of claim 8 , wherein the means passes through the nozzle body.
10. The vacuum nozzle of claim 9 , further comprising:
a vacuum port passing through the body and connected to the vacuum chamber.
11. The vacuum nozzle of claim 9 , further comprising:
a nozzle tip disposed in the lower surface of the nozzle body proximate to the cavity and connected to the vacuum chamber.