JPH10258448A - Taking-out apparatus for revolving type resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance work efficiency by eliminating the generation of conventional loss time by the servo control (numerical value control) of the first drive shaft of a first drive source and the second drive shaft of a second drive source, to prevent the generation of trouble such as the falling-off of a resin molding disc caused by chucking inferiority and to facilitate the positional setting of the taking-out position, advance stop position, recede stop position and open position of a revolving arm after a different kind of a mold is replaced. SOLUTION: In this revolving type resin molded product taking-out apparatus, the forward direction revolution and advance movement of a revolving arm are advanced at the same time and the reverse direction revolution and recede movement thereof are advanced at the same time by two-shaft servo control putting the numeral value control characteristics of a servo motor to practical use on the basis of the signal outputted from a control means 20 to first and second drive sources 7, 8 to stop the revolving arm at a predetermined position and inertia is reduced by the speed control thereof to prevent the generation of vibration at a stop time at the predetermined position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating type resin molded product take-out apparatus for taking out a resin information storage disk formed by an injection molding machine.

[0002]

2. Description of the Related Art A conventional revolving-type resin molded product take-out apparatus of this type is generally constructed as shown in FIGS. That is, it has a fixed platen 2 to which a fixed mold 1 is attached, and a movable platen 4 to which a movable mold 3 is attached. The movable platen 4 and the movable mold 3 guide the tie bar 5 to the fixed mold. In the plastic injection molding machine 6 configured to move forward and backward with respect to the first platen 1, the plastic injection molding machine 6 is installed on the fixed platen 2. When the movable mold 3 is opened, the first drive source 7 rotates the fixed mold 1 and the fixed mold 1 around the axis C along the longitudinal direction of the injection molding machine 6 outside the movable mold 3. The mold 1 and the movable mold 3 are turned in the forward and reverse directions on a plane F parallel to the mating surfaces 1A and 3A of the molds, and are moved in the direction of the axis C by the second drive source 8 and an advance / retreat moving mechanism (not shown). It has a revolving arm 9 which moves forward and backward, and has a structure in which a take-out chuck 11 for taking out a resin molding disk 10 formed by the injection molding machine 6 and held by the movable mold 3 is provided at the tip of the revolving arm 9. ing.

In the revolving resin molded product take-out apparatus having the above-described structure, the resin molded disk 10 is taken out in the following manner. The procedure will be described with reference to FIGS. 6 (A) to 6 (F). . As shown in FIG. 6A, when the resin mold disc 10 is formed with the fixed mold 1 and the movable mold 3 closed, the turning arm 9 is connected to the fixed mold 1 and the movable mold 3. It is at the outside standby position (the dashed line in FIG. 4) and waits for the fixed mold 1 and the movable mold 3 to open. . When the molding of the resin molded disk 10 is completed, the movable platen 4 and the movable mold 3 are retracted to be in the mold open state (see FIG. 6B). . The turning arm 9 is turned in the forward direction by the first drive source 7, and stops when the take-out chuck 11 reaches a position facing the resin molded disk 10 (see the solid lines in FIGS. 6C and 4). . The swivel arm 9 is advanced by the second drive source 8 toward the movable mold 3 and reaches the removal position. At this position, the take-out chuck 11 comes into contact with the resin molded disk 10 to attract or mechanically hold the resin molded disk 10 (FIG. 6D).
reference). . The swivel arm 9 retreats from the take-out position by the second drive source 8 and separates from the movable mold 3 (see FIG. 6E). . The swivel arm 9 is swung in the opposite direction by the first drive source 7, and the swivel arm 9 and the take-out chuck 11 move to the open positions (two-dot chain line in FIG. 4) outside the fixed mold 1 and the movable mold 3. Here, the resin molded disk 10 is opened (see FIG. 6F). Hereinafter, the above operations are repeated to take out the resin molded disks 10 sequentially and continuously.

As described above, in the above-described conventional apparatus for removing a resin molded product, as shown in FIG. 6 (B), after detecting the state where the movable mold 3 has reached the fully open position, the first drive source 7 is actuated. A drive command is transmitted to the second drive source 8 after detecting a state in which the unloading chuck 11 has reached a position facing the resin molded disk 10 as shown in FIG. The rotation arm 9 and the unloading chuck 11 are transmitted.
Is, as indicated by arrows in FIGS. 6C and 6D,
As a result of the linear two-step movement, it comes into contact with the resin molded disk 10 molded on the movable mold 3. Also, after the resin molded disk 10 is sucked or mechanically held at the take-out position, as shown by arrows in FIGS. 6E and 6F, the pivot arm 9 and the take-out chuck are moved by two-step linear movement. 11 will return to the open position. That is, the swing arm 9 and the unloading chuck 1
No. 1 causes a loss time because the approaching step into the mold and the retreating step outside the mold are performed by linear two-stage movement.

On the other hand, the first drive source 7 and the second drive source 8 use an actuator such as an induction motor or an air cylinder. Therefore, the turning arm 9 turns at a constant speed. For this reason, when the turning arm 9 stops rotating and moving forward or stops backward, vibration occurs due to the inertia of the turning arm 9 and the take-out chuck 11, so that a vibration damping time unnecessary for molding is naturally required. This leads to lost time. In addition, if the vibration damping during the forward rotation stop or the forward stop is insufficient, the chucking position of the resin molded disk 10 by the unloading chuck 11 becomes unstable, and often causes a chucking failure, and the resin molded disk 10
May fall off the unloading chuck 11.

On the other hand, positioning of the swing arm 9 at the take-out position, the forward stop position, the backward stop position, or the open position is as follows.
Since it is performed by a limit switch or a mechanical stopper, there is a problem that setting of these positions after exchanging different kinds of dies is complicated.

[0007]

That is, in the conventional apparatus for removing a swivel-type resin molded product, the approaching step of the swivel arm into the mold and the retreating step out of the mold are performed by linear two-step movement. Since a loss time is generated and a vibration damping time unnecessary for molding is required, the loss time is further increased. In addition, if the vibration is not sufficiently attenuated at the time of the forward rotation stop or the forward stop, the chucking position of the resin molded disk by the ejection chuck becomes unstable, and the chucking failure often occurs. There is also a risk of falling off the chuck. Further, there is a drawback that the position setting such as the take-out position, the forward stop position, the backward stop position, or the open position of the turning arm after exchanging the dissimilar mold is complicated. Therefore, the present invention eliminates the above-described loss time by performing servo control (numerical control) of the first drive shaft of the first drive source and the second drive shaft of the second drive source, and reduces the molding cycle time of the resin molded disk. In addition to shortening and improving work efficiency, preventing the occurrence of inconvenience such as the resin molded disc falling off due to poor chucking, and removing the swivel arm after exchanging different types of dies, advance stop position, retreat stop position or It is an object of the present invention to provide a revolving type resin molded product take-out device that can easily set a position such as an open position.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an injection molding machine in which an axis extending along a longitudinal direction of the injection molding machine outside a fixed mold and a movable mold is used as a rotation center. A swing arm that swings in the forward and reverse directions between the fixed mold and the movable mold by a first drive source, and that moves forward and backward in the axial direction by a second drive source. In a revolving type resin molded product take-out apparatus provided with a take-out chuck for taking out a resin molded disc molded by an injection molding machine and held by a movable mold, the first drive source and the second drive source are each provided with a servomotor. And the first drive shaft of the first drive source and the second drive shaft of the second drive source are subjected to two-axis servo control, so that the forward swing and forward movement of the swing arm proceed simultaneously, and The whirl Drive signal to advance the retraction movement opposite directions turning of the arm at the same time is characterized by being configured so as to be output to the first and the second drive source from the control means. According to the present invention, the signals output from the control means to the first drive source and the second drive source enable the swing arm to move forward and to move forward by two-axis servo control utilizing the numerical control characteristics of the servo motor. It is possible to simultaneously advance, and simultaneously advance the backward turning and the backward movement of the turning arm, and prevent the occurrence of vibration when stopping at a predetermined position by speed control.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the present invention, and FIG. 2 is a plan view. The same or corresponding parts as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted. In this figure, reference numeral 20 denotes a microcomputer (control means), which is basically a CPU 21, a ROM 22, and a RAM 2.
3, a program for controlling the CPU 21 is recorded in the ROM 22, and data indicating a position required for the operation of taking out the resin molded disk 10 is stored in the RAM 23.
That is, the swing arm 9 is moved to the movable mold 3 side by the standby position (described above) where the swing arm 9 waits outside the molds 1 and 3, and the ejection chuck 11 sucks or mechanically holds the resin molded disk 10. The release position (described above) and the opening position (described above) at which the swivel arm 9 moves out of the molds 1 and 3 to release the resin molded disk 10 are recorded. Therefore, the CPU 21
A first drive signal is output to the first drive shaft drive unit 25 of the first drive source 7 composed of a servo motor based on the position data recorded in the first drive shaft 7A and the signal from the position detection unit 24 of the first drive shaft 7A. In addition, based on the position data recorded in the RAM 23 and the signal from the position detection unit 28 of the second drive shaft 8A, the second drive shaft drive unit 26 of the second drive source 8 composed of a servomotor is driven by the second drive shaft drive unit 26. Output a signal. Also,
The CPU 21 is used for inputting a signal of a sensor of the take-out chuck 11 and inputting / outputting a signal between the injection molding machines 6 through an input / output signal unit 27.

Next, the operation of the present invention based on the program recorded in the ROM 22 will be described with reference to FIGS. 1, 2 and 3. When the program starts, the swing arm 9 is at the start position (standby position) indicated by the dashed line in FIG. 1, and the movable mold 3 has started to open. The CPU 21 outputs a first drive signal to the first drive shaft drive unit 25, activates the first drive source 7, and causes the turning arm 9 to accelerate and turn in the forward direction. At the same time, the second drive shaft drive unit 2
6, a second drive signal is output, the second drive source 8 is activated,
The turning arm 9 is moved forward together with the mounting base 29. When the first drive source 7 and the second drive source 8 reach respective predetermined positions, the speed is converted from a pre-programmed high speed to a fine speed, and the turning arm 9 and the take-out chuck 1 are converted.
1 to reduce the inertia of the movable mold 3 to prevent the occurrence of vibration at the time of stopping, and reach the take-out position where the resin molding disk 10 on the movable mold 3 is brought into contact [FIG. 3 (A) and FIG.
(B)].

Here, the ejection chuck 11 sucks or mechanically holds the resin molded disk 10. Next, the first drive source 7 is activated, and the turning arm 9 is accelerated and turned in the opposite direction. At the same time, a second drive signal is output to the second drive shaft drive section 26 to activate the second drive source 8 and the mounting base 29
At the same time, the turning arm 9 is moved backward. First drive source 7
When the second drive source 8 and the second drive source 8 reach respective predetermined positions, the speed is converted from a pre-programmed high speed to a fine speed, the inertia of the revolving arm 9 and the take-out chuck 11 is reduced, and the generation of vibration at the time of stop is reduced. While preventing it, it reaches the open position indicated by the two-dot chain line in FIG. 1 (see FIG. 3C), and here, the resin molded disk 10 is opened.

As described above, according to the present invention, the swing arm is controlled by the two-axis servo control utilizing the numerical control characteristics of the servo motor based on the signals output from the control means 20 to the first drive source 7 and the second drive source 8. The forward rotation and forward movement of the rotating arm 9 are simultaneously advanced, and the backward rotation and backward movement of the rotating arm 9 are simultaneously advanced and stopped at a predetermined position such as an extraction position, a forward stop position, a backward stop position, or an open position. At the same time, the speed control can reduce the inertia and prevent the occurrence of vibration when stopping at a predetermined position, thereby eliminating the loss time in the conventional example and shortening the molding cycle time of the resin molding disc 10 to reduce the work efficiency. Can be improved, and the occurrence of inconveniences such as the resin molded disk 10 falling off due to poor chucking can be prevented.

In the production of the resin molded disk 10, the fixed mold 1 and the movable mold 3 are often replaced with different kinds of fixed mold 1 and movable mold 3, and after the exchange,
It is necessary to adjust or change the take-out position, forward stop position, backward stop position, or open position of the swing arm 9, but unlike the conventional limit switch or mechanical stopper, it can be easily and accurately performed by numerical control. .

[0014]

As described above, according to the present invention, a signal is outputted from the control means to the first drive source and the second drive source, and the two-axis servo control utilizing the numerical control characteristics of the servo motor is performed. The forward swing and forward movement of the arm are simultaneously advanced, and the backward swing and backward movement of the swing arm are simultaneously advanced to stop at a predetermined position such as an extraction position, a forward stop position, a backward stop position, or an open position. By controlling the speed, the inertia can be reduced to prevent vibration when stopping at a predetermined position, eliminating the loss time in the conventional example, shortening the molding cycle time of the resin molding disk, and improving the work efficiency. This makes it possible to prevent inconvenience, such as the resin molded disk falling off due to poor chucking. In addition, it is possible to easily and accurately adjust or change the take-out position, the forward stop position, the backward stop position, or the open position of the turning arm after the dissimilar die exchange.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIGS. 3A to 3C are explanatory diagrams of an operation procedure of the present invention.

FIG. 4 is a front view of a conventional example.

FIG. 5 is a plan view of a conventional example.

FIGS. 6A to 6F are explanatory views showing an operation procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed mold 3 Movable mold 6 Injection molding machine 7 First drive source 7A First drive shaft 8 Second drive source 8A Second drive shaft 9 Rotating arm 10 Resin molding disk 11 Removal chuck 20 Control means C Injection molding machine Axis along longitudinal direction

Claims (1)

[Claims] A first drive source for moving a fixed mold and a movable mold outside of the fixed mold and the movable mold of the injection molding machine by using a first drive source about an axis extending along the longitudinal direction of the injection mold machine; And a revolving arm that reciprocates in the forward and reverse directions and moves forward and backward in the axial direction by a second drive source. A resin molded at the tip of the revolving arm by the injection molding machine and held by a movable mold In a revolving type resin molded product take-out device provided with a take-out chuck for taking out a molding disk, the first drive source and the second drive source are each constituted by a servomotor, and a first drive shaft of the first drive source and the A drive that performs two-axis servo control of a second drive shaft of a second drive source to simultaneously advance forward rotation and forward movement of the swing arm and simultaneously advance reverse rotation and backward movement of the swing arm. A swiveling resin molded product take-out device, wherein a signal is outputted from the control means to the first drive source and the second drive source.