Patent ID: 8097193

Claim:
A method of adjusting a mold thickness of a toggle-type mold clamping device in which a pressure receiving platen is moved to a predetermined position by a driving control of a mold thickness adjusting motor so as to make mold thickness adjustment, comprising: a first process in which a cross head of a toggle link mechanism is moved to a preliminary position set in advance so as to become a position on a mold open side rather than a mold closure position by the driving control of a mold clamping motor; a second process in which after the first process is finished, said pressure receiving platen is moved forward to the mold closure position where a mold is closed by the driving control of said mold thickness adjusting motor; a third process in which after the second process is finished, said cross head is moved forward by the driving control of said mold clamping motor and said mold is pressurized by performing torque limitation of the mold clamping motor, while said mold thickness adjusting motor is driven-controlled based upon a measured position of said cross head in relation to the mold closed position so as to move said pressure receiving platen in a forward direction or a backward direction, and said cross head is moved to said mold closure position; and a fourth process in which after the third process is finished, a clamping margin of the mold corresponding to a predetermined mold clamping force is set.