DIE CAM UNIT PROVIDED WITH AUXILIARY RETURN DEVICE
FIG8 is a view illustrating a punching operation performed by movement of the cam slider according to the present invention
Accordingly, as illustrated in FIG8, the cam slider 30 moves in the rightward direction in the drawing, so that the punching pin 16, which is provided on the front end of the cam slider, punches the panel mounted on the jig 14. Thereafter, when a punching operation is completed, the cam slider 30 including the punching pin 16 returns in the leftward direction in the drawing.
view
5
return spring
30
cam slider
14
jig
63
cover
64
elastic member
20
cam base
40
cam driver
16
punching pin
50
pressure member
60
auxiliary return device
32
return spring
['1. A mold cam unit having an auxiliary return device, the mold cam unit comprising: a cam base (20) comprising a slide portion formed in an installation space defined in a lower portion of a box-shaped body; a cam slider (30) located in the space of the cam base (20) and comprising therein a return spring (32) so as to reciprocatingly move along the slide portion; a cam driver (40) comprising a slide plate (41) mounted on an upper surface thereof to guide a lower slide groove (31) in the cam slider (30) to enable movement of the cam slider (30); a pressure member (50) provided on a lower surface of the cam slider (30) and comprising a downwardly bent pressure surface (51); and the auxiliary return device (60) provided on a side surface of the cam driver (40) that faces the pressure surface (51) and configured to come into contact with the pressure surface (51) via forward movement of the cam slider (30), thereby being elastically compressed.', '4. The mold cam unit according to claim 1, wherein the auxiliary return device (60) comprises: a housing (61) comprising one side surface formed with a passage hole and a remaining side surface that is open; a push member (62) comprising a push surface (62a) formed on one side thereof so as to be located in the passage hole (61a) in the housing (61) and configured to be guided so as to move along an inner space of the housing (61); a cover (63) configured to close the remaining side  surface of the housing (61); and an elastic member (64) located between the push member (62) and the cover (63).']