Adhesive applicator for manufacturing core, core manufacturing apparatus, and adhesive application method using same

A core manufacturing apparatus comprising:

• an adhesive applicator configured to apply an adhesive to a core material in order to bond interfaces of laminar members formed by blanking the core material;
• and
• a blanking unit blanking the core material at one side of the adhesive applicator;
• the adhesive applicator comprising a nozzle body having at least one adhesive outlet, a nozzle plug movably provided inside the nozzle body in order to open/close the adhesive outlet, and a plug hole passing through the nozzle plug and guiding an adhesive inside the nozzle body to an outside of the adhesive outlet;
• wherein the adhesive outlet includes a nozzle hole for discharging the adhesive from the inside to the outside of the nozzle body, wherein the nozzle plug includes a plug body movably provided inside the nozzle body to selectively block the nozzle hole, and a plug tip formed to protrude on a fore-end surface of the plug body,
• wherein an inner surface of the adhesive outlet has a plug opposite surface facing the fore-end surface of the plug body and being selectively in surface-contact with the fore-end surface of the plug body by movement of the plug body, wherein the plug opposite surface has a flat surface which is parallel to the fore-end surface of the plug body and orthogonal to an axis of the nozzle hole, and wherein the plug tip is retreatably inserted to the nozzle hole formed on the plug opposite surface and protrudes out of the adhesive outlet.

An adhesive applicator for manufacturing a core, configured to apply an adhesive to a core material in order to bond interfaces of laminar members formed by blanking the core material, comprising:

• a nozzle body having at least one adhesive outlet;
• and
• a nozzle plug movably provided inside the nozzle body in order to open/close the adhesive outlet,
• wherein the adhesive outlet includes a nozzle hole for discharging the adhesive from an inside to an outside of the nozzle body, wherein the nozzle plug includes a plug body movably provided inside the nozzle body to selectively block the nozzle hole, and a plug tip formed to protrude on a fore-end surface of the plug body,
• wherein an inner surface of the adhesive outlet has a plug opposite surface facing the fore-end surface of the plug body and being selectively in surface-contact with the fore-end surface of the plug body by movement of the plug body, wherein the plug opposite surface has a flat surface which is parallel to the fore-end surface of the plug body and orthogonal to an axis of the nozzle hole, and wherein the plug tip is retreatably inserted to the nozzle hole formed on the plug opposite surface and protrudes out of the adhesive outlet,
• wherein the plug tip has a closed recess formed concavely on a fore-end surface of the plug tip such that a part of the discharged adhesive is filled in the closed recess.