JPH021783B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a press apparatus for manufacturing glassware, and more particularly to a rotation drive apparatus for a turntable for recording a press mold.

(Technical background of the invention and its problems) Generally, in a press for manufacturing glass containers, etc., a plurality of molds are mounted on the outer periphery of a turntable at predetermined intervals in the circumferential direction, and the turntable is rotated intermittently. The molten glass is injected into the mold at a predetermined position by rotating the mold, and then press-worked at other predetermined positions.

By the way, as means for intermittently driving the turntable of the press, generally a Geneva gear mechanism operated by an AC motor and a continuously variable transmission or an inverter motor is disposed below the turntable. The turntable is driven intermittently by a Geneva gear mechanism.

However, in a device using such a Geneva gear mechanism, the amount of displacement between the center of the press and the center of the mold gradually increases due to wear of the mechanical parts, which may cause a decrease in product quality. Furthermore, the ratio of the stop time of the turntable to the intermittent feed time is determined by the number of teeth of the Geneva gear, that is, the number of divisions, and if the stop time corresponding to the press work time is increased,
The intermittent feed time is also longer than that, which causes disadvantages such as the required processing time becoming longer.On the other hand, if the intermittent feed time is shortened, the stop time will also be proportionally shortened, making it impossible to take a large amount of press time. There is a problem.

Further, as a rotational driving method for the turntable, there is a method using a hydraulic servo drive or a pulse motor, and there is a method in which acceleration/deceleration control is performed from the start of feeding to the stop in order to rapidly advance the intermittent rotation of the turntable.

In this case, the stop position of the turntable is detected by a detection sensor, etc., and a hydraulic servo or pulse motor, etc. is controlled via an electronic arithmetic unit, etc. for stop position control, and the turntable is driven via a gear, etc. attached to the table. A method is used.

However, although this method has advantages such as being able to compensate for wear inside the device and shortening the feed time, it also causes large errors in the stopping position due to backlash between the drive pinion and the driven gear. In addition, the torque of the pulse motor is large in order to perform sudden acceleration and deceleration for starting and stopping, and the acceleration/deceleration cycle is 24 cycles/deceleration.
Since the speed is as high as 36 cycles/min, there are problems such as the need for a very large pulse motor.
In addition, according to the hydraulic servo mechanism, a sufficiently large acceleration/deceleration torque can be obtained using a normal hydraulic motor, and it is possible to perform sufficient control in response to sudden acceleration and deceleration. If the stop position of the turntable is not maintained accurately as in the case shown in FIG.

(Object of the Invention) In view of the above points, the present invention provides a manufacturing method for glassware that is capable of rapidly accelerating and decelerating the rotation of a turntable, and also capable of accurately maintaining the stop position of the turntable. The purpose is to obtain a press device for

(Summary of the Invention) The present invention provides for integrally connecting a drive disk to a turntable on which a plurality of press molds are mounted on the outer periphery of the upper surface at predetermined intervals in the circumferential direction. It is characterized in that a drive gear operatively connected to a hydraulic drive device and a backlash removal gear that applies torque to the drive disk in the opposite direction to the drive gear are meshed with the surface of the drive gear.

(Embodiment of the Invention) Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 2, reference numeral 1 denotes a turntable on which a plurality of press molds 2 are arranged and mounted on the outer periphery of the upper surface at predetermined intervals in the circumferential direction. A drive device 3 is provided.

The turntable 1 is intermittently rotationally driven by the rotation drive device 3, and when the turntable 1 is stopped, molten glass is supplied to the press mold 2 at a predetermined position, and when the turntable 1 is stopped, molten glass is supplied to the press mold 2 at a predetermined position, A pressing action takes place.

By the way, at the bottom of the turntable 1,
Drive disks 4 constituting the rotational drive device 3 are coaxially connected. Gear parts 5a and 5b extending in the circumferential direction in two stages, upper and lower, are formed on the outer circumferential side of the drive disk 4, and a hydraulic motor 6 is mounted on the lower gear part 5a.
A drive gear 7 that is rotationally driven by is meshed with the drive gear 7. Note that the reference numeral 8 in the figure is a servo valve that controls the supply of pressure oil from a hydraulic source 9 such as a pressure oil tank to the hydraulic motor 6.

On the other hand, a backlash removal gear 10 is meshed with the upper gear portion 5b of the drive disc 4.
A second hydraulic motor 11 having an output smaller than the output of the hydraulic motor 6 is interlocked with the backlash removal gear 10, and the second hydraulic motor 11 constantly drives the backlash removal gear 10 through the backlash removal gear 10. Drive gear 7 relative to drive disc 4
Torque is applied in the opposite direction.

Incidentally, a table rotation position detector 12 is provided on one side of the driving disk 4, and the rotation position signal is sent to a comparator 1 via a detection signal processor 13.
4, where the operation program setter 15
The deviation signal is transmitted to the servo valve 8 via the comparator 16, and the rotation of the drive disk 4 is controlled via the hydraulic motor 6 and the drive gear 7.

On the other hand, the output signal from the setting device 15, the output signal from the comparator 16, and the detection signal processor 1
The output signals from 3 are also input to the program signal/table rotation position signal comparison calculator 17, where each signal is compared and analyzed to calculate the actual progress of the turntable and the hydraulic motor. , or an abnormality in the table rotation position detector, etc. is detected, and if the abnormality exceeds the limit value, the abnormality signal is sent to the table emergency stop circuit 18 and the press emergency stop circuit 19.
In addition, an emergency stop of the turntable and an emergency stop of the press are performed.

In normal times, the servo valve 8 is controlled by a setting signal from the operation program setting device 15, and the hydraulic motor 6 is thereby intermittently driven to control the drive gear 7 and the drive disc 4. The turntable 1 is intermittently driven to rotate through the rotor, and when the rotation is stopped, molten glass is injected into a predetermined press mold or press work is performed. On the other hand, during this time, torque in the opposite direction to the drive direction by the drive gear 7 is applied to the drive disc 4 via the second hydraulic motor 11 and the backlash removal gear 10, so that the gear portion of the drive disc 4 and the drive gear 7, the backlash is always maintained at 0.
Therefore, when the rotation is stopped, an accurate stop position can always be ensured, and the axes between the press mold and the punch can be aligned, and the occurrence of defective products can be reliably prevented.

In addition, the rotational position of the drive disk 4 is always detected by the table rotational position detector 12, and the signal is fed back to the setting signal, so that wear etc. inside the device can be automatically corrected. . Furthermore, since the hydraulic motor is driven and controlled via a servo valve, the response speed is fast due to the nature of the hydraulic servo mechanism, and the feeding time within one cycle time can be shortened. You can increase the amount of time you can do this. Therefore, the intermittent feed time can be set to the shortest time compared to the table stop time, which corresponds to the press operation time, and the production efficiency of the press apparatus can also be improved.

In the above embodiment, the driving disc is intermittently rotated by a hydraulic motor, but it may be driven by a hydraulic cylinder.

(Effects of the Invention) As explained above, in the present invention, a drive gear driven by a hydraulic drive device is applied to a drive disc, and a backlash removal method that applies a torque in the opposite direction to the drive gear to the drive disc. Since the gears are meshed with each other, it is possible to shorten the feeding time regardless of the number of divisions and stop time, and improve the production efficiency of the press machine.Moreover, the bump-crash removal gear eliminates the bump-crash between the drive gear and the drive disk. Since this becomes 0, an accurate stopping position of the driving disk is always ensured, and the center axes of the die and punch can be correctly aligned.

[Brief explanation of drawings]

Figure 1 is a control system diagram for the device of the present invention;
The figure is a side view showing the schematic configuration of the device of the present invention. DESCRIPTION OF SYMBOLS 1... Turntable, 4... Drive disk, 6... Hydraulic motor, 7... Drive gear, 8... Servo valve, 10... Backlash removal gear.

Claims (1)

[Scope of Claims] 1. A drive disk is integrally connected to a turntable on which a plurality of press molds are mounted at predetermined intervals in the circumferential direction on the outer periphery of the upper surface, and 1. A press device for manufacturing glassware, comprising: a drive gear interlockingly connected to a hydraulic drive device; and a backlash removal gear that applies a torque in the opposite direction to the drive disc to the drive disk. 2. The press device for manufacturing glassware according to claim 1, wherein the hydraulic drive device is a hydraulic motor. 3. The press device for manufacturing glassware according to claim 1, wherein the hydraulic drive device is a hydraulic cylinder. 4. The press device for manufacturing glassware according to claim 1, wherein the hydraulic drive device is driven and stopped by a servo valve controlled by a program setting signal. 5. The press apparatus for manufacturing glassware according to claim 4, wherein the program setting signal is fed back with a position signal of the drive disk.