Squeeze for screen printer
View Patent ↗Disclosed is a squeeze for a screen printer. The present invention provides a squeeze for a screen printer, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze including a solvent storage unit for storing solvents; and solvent discharging holes for discharging the solvents, stored in the solvent storage unit, to an adhesive paste. Accordingly, the squeeze for a screen printer of the present invention may be useful to prevent a dog ear phenomenon, namely that an adhesive paste layer is asymmetrically formed in an indented manner, by controlling a viscosity of an adhesive paste by discharging a solvent onto an adhesive paste layer that comes in contact with the squeeze when the adhesive paste layer is formed in the printed circuit board.
1. A screen printer comprising a squeeze, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze comprising:
a solvent storage unit having an inner space formed therein for storing solvents and being capable of discharging the solvents onto the adhesive paste that has been applied on the metal mask; and
solvent discharging holes formed in a surface of the solvent storage unit that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask to push the solvent and the adhesive paste into the opening of the metal mask.
2. The screen printer according to claim 1 ,
wherein the solvent storage unit further includes an irregular structure for inducing an eddy current to mix the adhesive paste with the solvent discharged through the solvent discharging holes, the irregular structure being formed in the surface of the solvent storage unit that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask.
3. The screen printer according to claim 2 ,
wherein a concave portion of the irregular structure is in a round shape.
4. A screen printer comprising a squeeze, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze comprising:
a solvent storage unit including a chamber having an inner space formed therein for storing solvents and is capable of discharging solvents onto the adhesive paste that has been applied on the metal mask; and
solvent discharging holes formed in a surface of the solvent storage unit that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask to push the solvent and the adhesive paste into the opening of the metal mask.
5. The screen printer according to claim 4 , wherein the solvent storage unit further includes an irregular structure for inducing an eddy current to mix the adhesive paste with the solvent discharged through the solvent discharging holes, the irregular structure being formed in the surface of the solvent storage unit that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask.
6. The screen printer according to claim 5 , wherein a concave portion of the irregular structure is in a round shape.