Abstract A crank mold clamping apparatus capable of variably adjusting a mold-opening stroke for permitting usage of various types of molds which includes a numerical control apparatus for controlling a servomotor for driving a crank plate connected to a movable platen in forward and reverse rotation within a limited rotation region. The numerical control apparatus calculates a rotation angle between rotational positions of the crank plate corresponding to mold clamping and mold-opening end positions of the movable plate, respectively, so that the crank plate is rotated for the calculated rotation angle in the direction of mold-opening or mold-closing to perform mold-opening or mold-closing when a mold-opening stroke, determined in accordance with the size of a mold to be used, is supplied.
A crank mold clamping apparatus having a mold-opening stroke whose length is variable, comprising: a crank disposed for rotation; a coupling member coupling said crank and a movable platen; means coupled to said crank for driving said crank in a forward and reverse rotational direction; means for variably setting the length of the mold-opening stroke; and means for controlling said driving means so that said crank is rotated forwardly and reversely within a limited rotational angular region corresponding to the length of the mold-opening stroke.
Claim 2
Dependent Claim
85 words
A crank mold clamping apparatus having a mold-opening stroke whose length is variable, comprising: a crank disposed for rotation; a coupling member coupling said crank and a movable platen; means coupled to said crank for driving said crank in a forward and reverse rotational direction; means for variably setting the length of the mold-opening stroke; and means for controlling said driving means so that said crank is rotated forwardly and reversely within a limited rotational angular region corresponding to the length of the mold-opening stroke.
Claim 3
Dependent Claim
34 words
A crank mold clamping apparatus according to claim 1, wherein said driving means comprises a servomotor, said setting means comprises a manual data input device, and said controlling means comprises a numerical control apparatus.
Claim 4
Dependent Claim
16 words
A crank mold clamping apparatus according to claim 1, wherein said driving means comprises a servomotor.
Claim 5
Dependent Claim
19 words
A crank mold clamping apparatus according to claim 1, wherein said setting means comprises a manual data input device.
Claim 6
Dependent Claim
18 words
A crank mold clamping apparatus according to claim 1, wherein said controlling means comprises a numerical control apparatus.
Claim 7
Dependent Claim
17 words
A crank mold clamping apparatus according to claim 1, wherein said crank comprises a circular crank plate.