摘要:
Press for the injection-moulding of plastic materials and/or non-ferrous alloys comprising a movable plane and a fixed plane, on whose opposite sides a mould and a counter mould are applied. Four cross members are provided associated to said movable (10) and fixed (12) planes and clamping means (46) acting on said cross members (14) in order to transmit the pressure generated by a piston means to said movable plane (10) during the injection phase. The cross members (14) are, at one end, integral with the movable plane (10) and project from this on the side of the fixed plane (12), four operating heads (28), each of them comprising one of said piston means for controlling the closing of the mould and counter mould and one of said clamping means (46). With said piston means are associated first and second abutment means (18,50) adapted to be in two operating positions in the first one of them, during moulding, they are detached between them, and in the second one of them, at the end of moulding, they are in contact between them. Between the clamping means (46) and the fixed plane (12) are located elastic means (47) adapted to keep under engagement the clamping means (46) and the control piston means when these last are deactivated.
摘要:
A mold-clamping control method for an injection molding machine includes the steps of detecting a value of a monitor item in a monitor region predetermined in relation to a mold closing operation during the course of a mold clamping step; differentiating the detected value in order to obtain a differential detection value; and performing emergency processing when the differential detection value exceeds a threshold value. The monitor item may be torque or velocity of a servomotor for performing a mold closing operation.
摘要:
The value of a monitor item is detected in a monitor region predetermined in relation to a mold closing operation during the course of a mold clamping step. Emergency processing is performed when the detected value exceeds a threshold value. There are preset an anomalous-state mold opening velocity higher than a normal-state mold opening velocity on the basis of which mold opening control is performed in a normal state, and an anomalous-state-velocity end position at which mold opening control based on the anomalous-state mold opening velocity is ended. Mold opening control based on the anomalous-state mold opening velocity is performed in a portion of the monitor region ranging from a point corresponding to time when the detection value has exceeded the threshold value, to a point corresponding to the anomalous-state-velocity end position.
摘要:
A clamping mechanism of a molding machine, including a bed; a stationary platen mounted on the bed, and carrying a stationary mold; a guide bar arranged fixedly relative to the stationary platen, and defining a longitudinal guiding axis; a first movable platen arranged movably relative to the stationary platen along the guiding axis, and carrying a movable mold; a support structure interposed between the guide bar and the first movable platen, and movably supporting the first movable platen on the guide bar along the guiding axis; a second movable platen separate from the first movable platen, and arranged movably relative to the stationary platen along the guiding axis; a connecting member connecting the first movable platen and the second movable platen to each other; and a drive section for applying a drive force to the second movable platen, to move the first movable platen and the second movable platen along the guiding axis. The support structure includes a spline engaging surface provided on the guide bar and a ball spline nut provided in the first movable platen, the ball spline nut being operatively engagable with the spline engaging surface.
摘要:
In a molding machine, a fixed platen which supports a fixed die is disposed on one end of a base plate. A movable platen which supports a movable die and a supporting mount which supports each one end portion of the four tie bars are mounted on slide units. The movable platen and the supporting mount are advanced so as to close the die, a tip portion of each tie bar is locked to the fixed platen by a lock mechanism, and a die clamping cylinder provided on the movable platen is actuated to generate a clamping force so as to execute molding. After that, the lock mechanism executes an unlocking operation so as to cause the movable platen and the supporting mount to retreat to a die open position. Furthermore, an attaching and detaching mechanism releases the die clamping cylinder so as to cause only the supporting mount to significantly retreat from the movable platen, and thus the four tie bars are completely evacuated from the fixed die and the movable die.
摘要:
In a single-component or a multi-component injection molding machine with a nozzle-side clamping plate firmly connected to a machine bed and a closing-side clamping plate supported on the machine bed so as to be movable thereon relative to the nozzle-side clamping plate, and each clamping plate carries a mold half of an injection-molding tool, the mold half or a part of the mold half on the closing-side clamping plate is rotatable about an axis of rotation extending in closing direction and is axially movable along the axis of rotation. In the closing-side clamping plate, a motor is received and which a rotatable shaft extends through the motor and is rotatable by the motor for rotating the mold half connected to the closing side clamping plate.
摘要:
A positioning device for aligning and guiding first and second mold halves together is provided. The positioning device includes a first member defining an alignment axis and having a male portion. The first member is mounted to the first mold half. A second member is separable from the first member and defines a female portion for mating with the male portion along the alignment axis to align the first and second mold halves together. The second member is mounted to the second mold half. The male portion presents a first bearing surface and the female portion presents a second bearing surface. A cage that rotatably supports a plurality of needle bearings reduces friction along the bearing surfaces when mating the members together along the alignment axis. A spring resiliently supports the cage.
摘要:
An injection molding machine includes a stationary platen, a movable platen constructed for movement relative to the stationary platen, at least one tie bar for tension-proof connection of the fixed and movable platens, and a traction transmitting securing device including a securing element, disposed on a rear side of one of the platens, for interacting with the tie bar within an engagement zone. The securing element and the tie bar are provided with a number of projections and recesses in axial spaced-apart relationship to establish a form-fitting connection, whereby the projections and the recesses are pressed together when exposed to a tensile stress and interlock at an axial clearance which increases along the engagement zone in axial direction corresponding to the tensile stress of the tie bar.
摘要:
A stationary platen and link housing are coupled to each other through tie bars. A movable platen is coupled to a front surface of the link housing through a toggle mechanism. Two slide bars are fixed to the back surface of the movable platen and each slide bar extends in a parallel way from a back surface toward the moving direction of the movable platen. Two hollow shafts are each fixed to the front surface of the link housing so as to correspond to the slide bar. Each hollow shaft extends in a parallel way from a front surface toward the moving direction of the movable platen. Each respective slide bar is inserted into the inside of the corresponding hollow shaft to allow it to slide along the inside of the hollow shaft.
摘要:
An apparatus for the injection moulding of plastic material, comprising a stationary and a movable mould mounting plate for the parts of the mould which receives the plastic material, separate devices for displacement of the movable mould mounting plate between an open and a closed position of the mould and for producing the closing force for holding the mould parts together, wherein the movable mould mounting plate bears against at least one fixable abutment which is displaceable in the released condition with the mould mounting plate, wherein a single motor serves for displacement of the movable mould mounting plate, for producing the closing force and for fixing or releasing the abutment.