JPH0528619U - Device for taking out plastic molded products - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the take-out time until the plastic molded product separated from the mold by the projecting mechanism is sucked after moving from the standby position to the take-out position. [Structure] The ejecting time from when the eject signal is output to when the molded product is separated from the mold by the ejecting mechanism that operates by this is measured by an eject timer, and the measured ejecting time is displayed. Based on this display time, the time setting section is manually operated to set the reference time. The position detecting means determines the moving position from the standby position of the chucking mechanism that moves according to the take-out signal. By the control unit,
The target arrival time from each moving position to the take-out position is calculated, and it is constantly monitored that the target arrival time matches the set reference time. When they match, an eject signal is output. Therefore, the projecting operation by the projecting mechanism section is performed in parallel with the movement of the chucking mechanism section, and the projecting operation is completed at the same time when the chucking mechanism section reaches the extraction position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plastic molded product take-out device for picking up a plastic molded product attached to one mold after opening the mold in an injection molding machine and adsorbing the plastic molded product at a timing of separating it from the mold by a mechanism section. is there.

[0002]

[Prior Art]

 As shown in FIG. 4, the basic operation of the cutting injection molding machine is as follows. After the mold is clamped (A), the resin is injected (B) into the mold and the resin is cooled (C). The mold is released (D), and the molded product is taken out (E) by the take-out mechanism section including a product take-out robot, for example.

As shown in FIG. 5, the taking-out of the molded product starts when the taking-out mechanism section is normally stopped at the standby position (F) and the mold opening is completed and the taking-out signal is output. Then, the moving direction is changed at the molded product pull-out position (G) and the molded product is stopped when it reaches the molded product take-out position (H), and the chucking mechanism absorbs the molded product separated from the mold by the ejecting mechanism. Then, return to the pull-out position (G) in that state, take out the molded product, release the suction by the chucking mechanism part, and drop the molded product into the predetermined storage location, then return to the original standby position (F ) Return to.

[0004]

[Problems to be solved by the device]

 However, the take-out by the take-out device described above is performed at the timing shown in FIG. That is, at the time when the mold opening is completed and the take-out signal is output, the take-out mechanism section starts moving from the standby position (F) toward the pull-out position (G), as shown in FIG. After the time Tz has elapsed, the moving direction is changed at the pull-out position (G) to move toward the take-out position (H) as shown in FIG. 7B, and after the time Ty elapses, it reaches the take-out position (H). After that, as shown in Fig. 7C, the eject signal is output and the ejecting mechanism starts to operate, thereby separating the molded product from the mold, and after the elapse of Te time when the ejecting operation ends. As shown in the same part (d), the suction command signal is output and the chucking mechanism sucks the molded product and backs up to the pulling position (G). Therefore, it takes a relatively long time of Tz + Ty + Te from the output of the take-out signal to the adsorption of the molded product, which is a factor of lowering work efficiency.

Therefore, the present invention has a technical object to provide a plastic take-out device capable of shortening the take-out time of a molded product.

[0006]

[Means for Solving the Problems]

 As a technical means for achieving the above-mentioned problems, the present invention has a plastic molded product takeout device configured as follows. That is, in a plastic molded product take-out device that picks up a plastic molded product that is separated from the mold by the ejecting mechanism unit after releasing the mold by the chucking mechanism unit, the ejecting mechanism unit is output from when the eject signal is output. The eject timer that measures the protruding time until the completion of the ejecting operation of the device, the display unit of the measured protruding time, the time setting unit that sets the reference time based on the display of this display unit, and the movement starts by the take-out signal. Position detection means for detecting the moving position of the chucking mechanism part, and a target arrival time from the position detected by the position detection means to the chucking mechanism part reaching the product take-out position are calculated, and the target arrival time is calculated. When the time matches the set reference time, the eject signal is output to activate the ejecting mechanism section. It is characterized by comprising a control unit.

[0007]

[Action]

 When the actual take-out process is started, the ejecting time by the ejecting mechanism is obtained in advance by the eject timer, and this ejecting time is displayed on the display. Set the reference time by operating the time setting section based on the displayed protruding time and the type of plastic molded product to be taken out. In the actual take-out process, the chucking mechanism starts moving due to the take-out signal, and in the process of moving, the time of the moving position of the chucking mechanism from the standby position is constantly detected and the detected position The target arrival time required to move from the to the take-out position is constantly calculated, and it is determined whether or not the calculated target arrival time matches the set reference time. Then, at the time of coincidence, an eject signal is output and the ejecting mechanism section starts to operate. That is, the take-out mechanism is operated in parallel with the movement of the chucking mechanism, and after the set reference time has elapsed, at the same time when the ejecting operation for separating the molded product from the mold by the ejecting mechanism ends, the chucking mechanism is completed. The part reaches the unloading position and starts the suction operation. Therefore, it is possible to shorten the time for the projecting operation as compared with the existing device.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a block configuration of an embodiment of the present invention. A chucking mechanism section (7), a moving mechanism section (5) of the chucking mechanism section (7), and a protruding mechanism section (8) in a mold mechanism section. Is the same as the existing one. The central processing unit (1) controls the entire device based on a software program preset in the ROM (2), and a position detection unit (6) for detecting the moving position of the mobile mechanism unit (5). ) And the signal stored in ROM (3) based on the detected position signal, and an eject signal is output to the ejection mechanism (8). The eject timer (4) measures the ejecting time from the output of the eject signal to the completion of the ejecting operation prior to the actual take-out process. The display unit (9) displays the protruding time measured by the eject timer (4), and the time setting unit (10) is for manually setting the reference time.

Next, the operation of the above embodiment will be described in detail with reference to the flowchart of FIG. 2 and the timing chart of FIG. Every time a new molding process is performed, the teaching operation is performed at least once. That is, it is constantly determined whether or not the take-out signal is output after the mold opening is completed (step S1). When the take-out signal is output, the moving mechanism section (5) causes the chucking mechanism section (7) to move to the standby position. The movement is started from (F) toward the extraction position (G) (step S2). Subsequently, it is monitored whether or not the moving mechanism section (5) has completed the movement of the chucking mechanism section (7) to the take-out position (H) and the eject signal is output to the ejecting mechanism section (8). Yes (step S3). When the eject timer (4) is started at the time when the ejection signal is detected to be output (step S4), whether the ejection operation of the ejection mechanism section (8) is completed and the forward advance signal is output. It is determined whether or not (step S5). When the ejecting operation is completed and the output of the forward limit signal is detected, the eject timer (4) is stopped and the ejecting time measured up to that point is temporarily stored in the RAM (3). Is displayed on the display unit (9) (step S6). Here, the protrusion time is, for example, 0. If it is 25 seconds, it is displayed as "-0.25 sec". Based on the display time of the display unit (9), the time setting unit (10) is manually operated to set the reference time (step S7). In this case, it is set in consideration of the plastic molded product to be taken out. In other words, if the displayed ejection time is set as it is, for plastic molded products that may fail to adsorb once in several times, the reference time is set in consideration of it. At this time, the chucking mechanism section (8) returns to the original standby position (F) after performing the normal take-out operation of the molded product.

After that, the actual take-out operation is performed. That is, it is always determined whether or not the mold opening is completed and the take-out signal is output (step S8). When the take-out signal is output, the moving mechanism (5) pulls out the chucking mechanism (8) from the chucking mechanism (8). When the movement to (G) is started, the central processing unit (1) receives the position detection signal based on the movement distance from the standby position of the movement mechanism section (5) input from the position detection section (6). The time data from the standby position (F) of the moving mechanism (5) stored in the RAM (3) to the take-out position (H) is calculated to reach the take-out position (H) from each detection position. The target arrival time is calculated (step S9), and it is determined whether or not the target arrival time matches the reference time set by the time setting unit (10) during the teaching operation (step S10). The same operation is repeated until they match, and when they match, an eject signal is output to the ejecting mechanism section (8) (step S11). Therefore, as shown in FIG. 3C, an eject signal is output before the chucking mechanism section (7) reaches the extraction position (G), and the ejecting mechanism section (8) starts the ejecting operation. That is, as is clear from the comparison between FIGS. 2B and 2C, the protrusion mechanism 8 is actuated in parallel with the movement of the chucking mechanism 7 and the output of the eject signal is started. After the ejection time Te has elapsed, the chucking mechanism (7) reaches the take-out position (H) at the same time as the termination of the ejecting operation of separating the molded product from the mold by the ejecting mechanism (8), and The suction operation is started as shown in d). After taking out the molded product, it returns to the original position (step S12).

The present invention is not limited to the above-described embodiment, and the set reference time Te is subtracted from the time Tz + Ty when the chucking mechanism section (7) reaches the take-out position (H) from the standby position (F). The ejected signal may be output when the time (Tz + Ty−Te) has been calculated and the time (Tz + Ty−Te) has elapsed from the start of the extraction operation.

[0012]

[Effect of the device]

 As described above, according to the plastic molded product take-out device of the present invention, the movement of the chucking mechanism and the ejecting operation of the ejecting mechanism are performed in parallel, and the chucking mechanism reaches the take-out position to perform the suction operation. Since the timing of the start and the timing of the end of the ejecting operation by the ejecting mechanism are made to coincide with each other, it is possible to shorten the total take-out time of the molded product by the ejecting time of the existing device. Also, since the reference time is set manually, there is an advantage that the reference time can be immediately corrected when the chucking mechanism unit fails in the suction operation once every several times.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of the same.

FIG. 3 is a timing chart of the same.

FIG. 4 is an operational process diagram of an injection molding machine to which the present invention can be applied.

FIG. 5 is an explanatory diagram of a molded product taking-out operation.

FIG. 6 is a timing chart of a conventional device.

[Explanation of symbols]

 1 Central processing unit (control unit) 4 Eject timer 5 Moving mechanism unit 6 Position detection unit 7 Chucking mechanism unit 8 Projection mechanism unit 9 Display unit 10 Time setting unit

Claims (1)

[Scope of utility model registration request] 1. A plastic molded product take-out device for picking up a plastic molded product, which is separated from the mold by a projecting mechanism unit after releasing the mold, by a chucking mechanism unit and picking up the plastic molded product from the time when an eject signal is output. The eject timer that measures the protruding time until the protruding operation of the part is completed, and the display part of the measured protruding time,
A time setting unit that sets a reference time based on the display of this display unit, a position detection unit that detects the moving position of the chucking mechanism unit that starts moving by a take-out signal, and the chuck from the position detected by this position detection unit. A control unit that calculates a target arrival time until the king mechanism unit reaches the product take-out position, and outputs the eject signal to activate the ejection mechanism unit when the target arrival time matches the set reference time. A device for taking out a plastic molded article, comprising: