JP2010105330A - Controller of injection molding machine with production change-over function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection molding machine with production change-over function capable of starting set-up separately for a mold clamp section and an injection section. <P>SOLUTION: A display screen of controller indicator includes a touch-sensitive display screen. A production change-over sequence registration screen V1 displays: a production change-over sequence button pcb for opting to perform the production change-over sequence automatically, a mold clamp set-up display window cw as a display area for setting a change-over sequence of mold clamp section, an injection section set-up display window iw as a display area for setting a change-over sequence of injection section, a set-up check button of mold clamp section cb as a start button for a next sequence of mold clamp section to allow manual starting of the next set-up sequence in the production change-over sequence of mold clamp section, and a set-up check button of injection section ib as a start button for a next sequence of injection section to allow manual starting of the next set-up sequence in the production change-over sequence of injection section. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control device that supports a setup operation for completing the production of an injection molded product in an injection molding machine and switching to the production of another injection molded product.

When producing multiple types of injection-molded products using an injection molding machine, it is necessary to complete the production of one type of injection-molded product and switch to the production of another type of injection-molded product next time. Is required.
For this setup operation, for example, the mold is closed at the mold clamping part of the injection molding machine, the mold temperature control hose is removed, the mold is taken out, and the mold is opened to carry in the mold for producing the next injection molded product. It is necessary to perform operations in order, such as adjusting the amount, exchanging the ejector pins, carrying in and fixing the mold to produce the next injection molded product, and adjusting the clamping force. In addition, in the injection part of the injection molding machine, the injection unit is retracted, the automatic purge to discharge the molding material used in the previous production, the change of the molding conditions including the temperature setting of the injection cylinder to change the injection molding temperature, Operations such as automatic purging for supplying molding materials to be used in the production of the next injection molded product must be executed in order.

  Patent Document 1 discloses a method for supporting execution of the above-described setup work in order. The method disclosed in this patent document is a method in which guidance messages for individual operations relating to a predetermined setup are sequentially displayed on the display of a controller in accordance with the work procedure when the injection molding machine is set up.

JP 2004-155088 A

  In the injection molding machine, by arranging a shield in front of the injection nozzle to prevent the purged resin from splashing into the mold mounting part, the mold clamping part and the injection part are set up in parallel. There is a configuration that can shorten the time required for the setup work.

  In an injection molding machine that can perform the setup of the clamping part and the setup of the injection part in parallel, the method of displaying the setup of the clamping part and the setup of the injection part described in the background art along the work procedure is Since the setup of the injection part is started after the setup of the tightening part is completed, it takes a long time for the setup work and cannot be adopted.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an injection molding machine having a production switching function capable of starting the setup of a mold clamping unit and the setup of an injection unit independently.

The invention according to claim 1 of the present application is a control device for an injection molding machine having a production switching function for executing a setup sequence after completion of production according to a preset sequence.
The control device includes a display device, a first display means for displaying an execution state of a setup sequence of a mold clamping unit of the injection molding machine on a display screen of the display device, and an injection unit of the injection molding machine Second display means for displaying an execution state of the setup sequence; means for displaying a clamping part setup confirmation button for manually starting a setup sequence next to the setup sequence of the clamping part;
Means for displaying an injection unit setup confirmation button for manually starting the setup sequence next to the injection unit setup sequence, and clamping the mold by the mold clamping unit setup confirmation button independently of the setup sequence of the injection part. A production switching function characterized in that the next setup sequence of the injection unit is started and the next setup sequence of the injection unit is started individually by the injection unit setup confirmation button independently of the setup sequence of the mold clamping unit. It is a control apparatus of the injection molding machine which has.

According to a second aspect of the present invention, instead of displaying the mold clamping part setup confirmation button and the injection part setup confirmation button on the display screen of the display device, the input unit is connected to the control device. The control apparatus for an injection molding machine having a production switching function according to claim 1.
According to a third aspect of the present invention, the set-up sequence of the mold clamping unit includes at least a mold removal and a mold mounting operation, and the set-up sequence of the injection unit includes at least an injection unit retraction and a purge operation. 2 is a control device for an injection molding machine having the production switching function according to any one of 2;
According to a fourth aspect of the present invention, the first display means is means for displaying the execution state of the setup sequence of the mold clamping unit in a window format on the display screen of the display device, and the second display means is the display. The control device for an injection molding machine having a production switching function according to any one of claims 1 to 3, wherein the control unit is a means for displaying an execution state of a setup sequence of an injection unit on a screen in a window format. .

  According to the present invention, it is possible to provide a control device for an injection molding machine having a production switching function capable of independently starting the setup of the mold clamping unit and the setup of the injection unit.

FIG. 1 is a schematic diagram of an injection molding machine and a control device that controls the injection molding machine according to an embodiment of the present invention. Reference numeral M denotes an injection molding machine. Code M _c is the clamping portion, reference numeral M _i is the injection unit, reference numeral M _b is a machine base. Injection molding machine M is provided with a clamping portion M _c, and injection unit M _i on machine base M _b.

The mold clamping portion _Mc includes a movable platen forward / reverse motor 20 for moving the movable platen 23 back and forth, a rear platen 21, an ejector forward / reverse motor 22 for ejecting an ejector pin for pushing a molded product out of the mold, a movable platen 23, a tie bar 24, A fixed platen 25, a toggle mechanism 33, and an ejector mechanism 34 are provided. The rear platen 21 and the fixed platen 25 are connected by a plurality of tie bars 24, and the movable platen 23 is disposed so as to be guided by the tie bars 24. A movable mold is attached to the movable platen 23, and a fixed mold 35 is attached to the fixed platen 25.

The injection part M _i includes a cylinder 27, a hopper 28 that supplies resin pellets into the cylinder 27, a hopper shutter 29 that blocks the supply of resin from the hopper 28 into the cylinder 27, a screw rotation motor 30, and a screw forward / reverse motor 31. And a screw 32 that is rotated from the screw rotation motor 30 via a transmission mechanism. These configurations are not different from conventional injection molding machines.

The shielding plate 26 is a member used to implement parallel setup and clamping unit M _c, and a setup of the injection unit M _i by placing in front of the nozzle of the cylinder 27. By using the shielding plate 26, it is possible to prevent the purged resin from being scattered on the mold mounting portion.

  The control device 1 is a control device that controls the injection molding machine M to control the production of a molded product. The processor 2 is connected to a servo interface 4, a ROM 6 for storing system programs, a RAM 7 for temporarily storing data and various control programs, an input / output interface 8, and an input device interface 9 with a display device via a bus 3. Yes. An input button 11 to be described later is connected to the input / output interface 8. The ROM 6 stores a processing program for supporting the setup according to the present invention.

  A servo amplifier 5 is connected to the servo interface 4. An input device 10 with a display device is connected to the interface 9 for input device with a display device. The input device 10 with a display device includes a touch panel type liquid crystal display and a keyboard. Various commands and various parameters can be set by the input device 10 with a display device. Various commands and parameters can be set by displaying various interface screens on the display screen of the touch panel type display device of the input device with display device 10.

  The processor 2 is a processor that controls the entire injection molding machine. Connected to the servo amplifier 5 are a movable platen forward / reverse motor 20, an ejector forward / reverse motor 22, a screw rotation motor 30, and a screw forward / backward motor 31. Although the servo amplifier 5 is shown as one in the figure, a servo amplifier is connected to each of the motors. Each servo motor includes a position / speed detector (not shown), and a position / speed detection signal is fed back to the control device 1.

  FIG. 2 is a diagram showing a production switching sequence registration screen of the injection molding machine. For example, the production switching sequence registration screen V1 of the injection molding machine shown in FIG. 2 is displayed on the display device of the input device with a display device 10 shown in FIG. The production switching sequence registration screen V1 sets a production switching sequence button pcb for selecting to automatically start a production switching sequence when production is completed, a display area for setting a mold clamping unit production switching sequence, and an injection unit production switching sequence. It has a display area.

  The mold clamping part production switching display area is the setup process of the mold clamping part to switch to the mold used for the production of another type of injection molded product next time, mold closing, mold temperature control hose removal, mold removal, Adjustment of mold opening amount to carry in the mold for producing the next injection molded product, replacement of ejector pins, loading and fixing of the mold to produce the next injection molded product, adjustment of clamping force, etc. This is the area where the tasks are entered in the order of execution.

  In the example shown in FIG. 2, the mold clamping part production switching sequence is as follows: sequence 1 is a low-pressure mold closing c1, sequence 2 is a mold ceiling check c2, sequence 3 is a fixing bolt removal c3, and sequence 4 is a movable platen opening c4. , Sequence 5 is set as the setup sequence of the mold clamping part of the mold carry-out c5.

  In addition, the injection part production switching display area discharges the molding material used in the previous production by retreating the injection unit during the setup of the injection part to switch to the material used for the production of another type of injection molded product next time. In order of operations such as automatic purging, change of molding conditions including temperature setting of injection cylinder to change injection molding temperature, automatic purging to supply molding material used in next production It is an area to input to.

  In the example shown in FIG. 2, the injection unit production switching sequence is as follows: sequence 1 is injection unit backward i1, sequence 2 is hopper shutter closing i2, sequence 3 is automatic purge activation i3, sequence 4 is purged resin disposal i4, sequence 5 Is set in the setup sequence of the injection section of the next temperature condition reading i5.

  Note that the number of sequences that can be set is not limited to No. 5. The description of the subsequent sequences is merely omitted, and the maximum sequence that can be set constitutes the apparatus. An appropriate number is set in consideration of memory and the like. Each sequence may be set from a touch panel display screen, or may be set from a manual input device (not shown).

  Next, the production of the injection molding machine registered in the production switching sequence registration screen V1 in order to support the setup work for completing the production of the injection molded product in the injection molding machine M and switching to the production of the next another injection molded product. Displaying the switching sequence on the input device 10 with a display device of the injection molding machine M will be described.

  FIG. 3 is a screen example 1 of an execution state display screen V2 that displays an execution state during execution of the production switching sequence of the injection molding machine. Screen example 1 of this execution state display screen V2 may be displayed when the production switching sequence of the mold clamping unit or the injection unit is executed, or may be always displayed. The execution state display screen V2 displays a mold clamping unit setup display window cw for displaying the execution state of the sequence currently being executed in the mold clamping part production switching sequence, and the execution state of the sequence currently being executed in the injection part production switching sequence. Injection part setup display window iw, mold clamping part setup confirmation button cb which is a mold clamping part next sequence start button capable of manually starting the next setup sequence in the mold part production switching sequence, and next in the injection part production switching sequence An injection unit setup confirmation button ib that is an injection unit next sequence start button that can manually start the setup sequence is displayed.

  In screen example 1 of execution state display screen V2 shown in FIG. 3, it is displayed that low-pressure mold closing (see c1 in FIG. 2) is being executed in the mold clamping part production switching sequence, and injection is performed in injection part production switching sequence. It is displayed that the unit backward (see i1 in FIG. 2) is being executed. The sequence displayed on the execution state display screen V2 is one of the sequences registered on the production switching sequence registration screen V1 described in FIG.

  The worker who performs the setup work visually checks the mold clamping part setup display window cw displaying the mold clamping part production switching sequence displayed on the execution state display screen V2 and the injection part setup display window iw displaying the injection part production switching sequence. By doing so, it is possible to simultaneously confirm the progress of the setup sequence of the mold clamping unit and the injection unit being automatically executed by the injection molding machine. Further, by providing the mold clamping part setup confirmation button cb and the injection part setup confirmation button ib, the setup of the mold clamping part or the injection part can be independently activated at any timing of the worker, and the setup time can be shortened. realizable.

  FIG. 4 is a screen example 2 of an execution state display screen V2 that displays a production switching sequence to be executed that is displayed when an operator performs setup change. In screen example 2 of this execution state display screen V2, the work contents performed by the worker in the mold clamping unit production switching sequence are displayed as guidance in the mold clamping unit setup display window cw. The work content performed by the worker in the injection part production switching sequence is displayed as guidance on the injection part setup display window iw.

  As in FIG. 3, the mold clamping unit setup confirmation button cb that can manually start the next setup sequence in the mold clamping unit production switching sequence, and the next setup sequence is manually started in the injection unit production switching sequence. An injection unit setup confirmation button ib that can be displayed is displayed.

  The worker who performs the setup work visually checks the mold clamping part setup display window cw displaying the mold clamping part production switching sequence displayed on the execution state display screen V2 and the injection part setup display window iw displaying the injection part production switching sequence. Thus, the work content to be done as the setup work can be known immediately without error, and the mold clamping part setup confirmation button cb and the injection part setup confirmation button ib are provided, so that the mold can be obtained at any timing of the worker. The setup of the fastening part or the injection part can be started independently, and the setup time can be shortened.

  In addition, the setup of the mold clamping unit and the injection unit can be started independently and in parallel at any timing of the operator, so that the mold is displayed on the execution state display screen V2 in the middle of executing the production switching sequence of the injection molding machine. The sequence currently being executed is displayed in the fastening part setup display window cw, and the work content performed by the worker in the injection part production switching sequence is displayed as guidance in the injection part setup display window iw, or vice versa. The work contents performed by the worker in the mold clamping part production switching sequence are displayed as guidance in the mold clamping part setup display window cw, and the sequence currently being executed in the injection part production switching sequence is displayed in the injection part setup display window iw. There is also.

As shown in FIGS. 3 and 4, the clamping portion M _c the work execution state and worker setup sequence, and displays the divided injection unit M _i, further setup of the injection unit and the clamping unit By preparing the setup confirmation buttons that can start the sequence independently, the operability and work efficiency can be improved, and the certainty and reliability of the setup work can be improved.

  FIG. 5 is an example of a screen that displays the execution state during execution of the production switching sequence of the injection molding machine in a single screen display without performing window display. In this screen example, the execution state of the mold clamping part production switching sequence and the execution state of the injection part production switching sequence are displayed. In FIG. 5, instead of displaying the next sequence activation confirmation buttons cb and ib on the screen, the input button 11 connected to the control device may be used, or as shown in FIGS. 3 and 4. The next sequence activation confirmation buttons cb and ib may be displayed on the screen. By using the input button 11, the input device with a display device 10 that is not a touch panel type can be used.

Next, the control of the production switching sequence executed by the processor 2 of the control device 1 will be described with reference to FIG. FIG. 6 is a flowchart of the control for starting the production switching sequence. Hereinafter, it demonstrates according to each step.
[Step S1] When the production is finished by the injection molding machine M, it is determined whether or not the production switching sequence is on. If not, the production is finished because there is no next production by the injection molding machine M. If it is on, the process proceeds to step S2. Whether or not the production switching sequence is ON is determined based on the state set by the production switching sequence button pcb on the production switching sequence registration screen V1 of the injection molding machine M described in FIG.
● Turn on the clamping unit production switching activation signal A to start production switching sequence of Step S2] clamping portion M _c. By turning on the mold clamping part production switching start signal A, the mold clamping part production switching sequence shown in FIG. 7 is started.

● [Step S3] to turn on the injection unit production switching start signal B to start production switching sequence of the injection unit M _i. By turning on this injection part production switching start signal B, the injection part production switching sequence shown in FIG. 8 is started.
[Step S4] It is determined whether or not the mold clamping part production switching sequence completion signal C is turned on, that is, whether or not the mold clamping part production switching sequence shown in FIG. Wait until the completion signal C is turned on.
[Step S5] It is determined whether or not the injection part production switching sequence completion signal D is ON, that is, whether or not the injection part production switching sequence shown in FIG. Wait until is turned on.
When it is confirmed in steps S4 and S5 that the production switching sequence between the mold clamping unit and the injection unit has been completed, the control of the production switching sequence is terminated.

Next, an algorithm of a mold clamping part production switching sequence executed by the processor 2 of the control device 1 will be described with reference to FIG. Hereinafter, it demonstrates according to each step.
[Step SA1] It is determined whether or not the mold clamping part production switching start signal A is on, and wait until the mold clamping part production switching start signal A is turned on.
[Step SA2] The mold clamping part production switching sequence is started, and a mold clamping part setup display window cw and a mold clamping part setup confirmation button cb are displayed on the execution state display screen V2 of the production switching sequence. Alternatively, the mold clamping part setup display window cw and the mold clamping part setup confirmation button cb may be displayed in advance on the execution state display screen V2 of the production switching sequence.
[Step SA3] The step number CL of the mold clamping part production switching sequence is initialized to 1.
[Step SA4] The work content of step number CL in the mold clamping part production switching sequence is read.
[Step SA5] It is determined whether or not the work content of the step number CL is an end process sequence. If the process is an end process, the process proceeds to Step SA12. If not, the process proceeds to Step SA6. Alternatively, if there is no setup sequence to be read, the process may proceed to step SA12.

[Step SA6] It is determined whether or not the work content can be automatically executed. If the work content is automatically executable, the process proceeds to Step SA11. If the work content is not automatically executable, the process proceeds to Step SA7.
[Step SA7] The work instruction is displayed in the mold clamping part setup display window cw (see FIG. 4), and the process proceeds to Step SA8.
[Step SA8] It is determined whether or not it is necessary for the worker to confirm the completion of the work content in Step SA11. If necessary, the process proceeds to Step SA9, and if not necessary, the process proceeds to Step SA10. In step SA7, a work instruction is given to the worker, so the injection molding machine has no way of knowing the end of the work, so confirmation by the worker is necessary. In step SA8, the work content is executed by the automatic operation of the injection molding machine, so that the injection molding machine can know the end of the work. Also in this case, the mold clamping unit production switching sequence is configured so that it is possible to distinguish between the case where the worker needs to confirm the end of the work and the case where it is not necessary.

[Step SA9] Determine whether or not the mold clamping part setup confirmation button cb, which is a mold clamping part next sequence activation button, is on, and wait until it is turned on.
[Step SA10] Step number CL of the mold clamping part production switching sequence is advanced by 1, and the process returns to step SA4 to continue the process.
[Step SA11] The injection molding machine M is automatically operated according to the work content. During automatic operation, the execution state is displayed in the mold clamping part setup display window cw (see FIG. 3). Then, the process proceeds to step SA8.
[Step SA12] The mold clamping part production switching sequence completion signal C is turned on, and the process ends.

Next, the algorithm of the injection part production switching sequence executed by the processor 2 of the control device 1 will be described with reference to FIG.
[Step SB1] It is determined whether or not the injection part production switching start signal B is on, and waits until the injection part production switching start signal B is turned on.
[Step SB2] The injection part production switching sequence is started, and the injection part setup display window iw and the injection part setup confirmation button ib are displayed on the execution state display screen V2 of the production switching sequence. Alternatively, the injection unit setup display window iw and the injection unit setup confirmation button ib may be displayed in advance on the execution state display screen V2 of the production switching sequence.
[Step SB3] The step number IJ of the injection part production switching sequence is initialized to 1.
[Step SB4] The work content of step number IJ of the injection unit production switching sequence is read.

[Step SB5] It is determined whether or not the work content of the step number IJ is an end process sequence. If it is an end process, the process proceeds to Step SB12. If not, the process proceeds to Step SB6. Alternatively, if there is no setup sequence to be read, the process may proceed to step SB12.
[Step SB6] It is determined whether or not the work content can be automatically executed. If the work content is automatically executable, the process proceeds to Step SB11. If the work content is not automatically executable, the process proceeds to Step SB7.
[Step SB7] The work instruction is displayed in the injection unit setup display window iw (see FIG. 4), and the process proceeds to Step SB8.
[Step SB8] It is determined whether or not it is necessary for the worker to confirm the completion of the work contents in Step SB11. If necessary, the process proceeds to Step SB9, and if not necessary, the process proceeds to Step SB10. In step SB7, a work instruction is given to the worker. Therefore, since the injection molding machine has no way of knowing the end of the work, confirmation by the worker is necessary. In step SB8, since the work content is executed by the automatic operation of the injection molding machine, the injection molding machine can know the end of the work. In this case as well, the injection unit production switching sequence is configured so that it is possible to distinguish between cases where the worker needs to confirm the end of the operation and cases where it is not necessary.

[Step SB9] It is determined whether or not the injection unit setup confirmation button ib which is the injection unit next sequence activation button is on, and waits until it is turned on.
[Step SB10] Step number IJ of the injection part production switching sequence is advanced by 1, and the process returns to step SB4 to continue the process.
[Step SB11] The injection molding machine M is automatically operated according to the work content. Further, during automatic operation, the execution state is displayed in the injection unit setup display window iw (see FIG. 3). Then, the process proceeds to step SB8.
[Step SB12] The injection part production switching sequence completion signal D is turned on, and the process ends.
As described above, when the processor 2 of the control device 1 executes the processes shown in FIGS. 6 to 8, the mold clamping unit setup sequence and the injection unit setup sequence are independently processed in parallel. be able to.

It is the schematic of the control apparatus which controls the injection molding machine which is embodiment of this invention, and an injection molding machine. It is a figure which shows the production switching sequence registration screen of an injection molding machine. It is the screen example 1 of the execution state display screen which displays the production switching sequence now being performed (when a setup change is performed by the automatic operation of an injection molding machine). It is the screen example 2 of the execution status display screen which displays the production switching sequence now being performed (when a worker performs a setup change). It is an example of a screen which displays the display screen which displays the execution state during the production switching sequence execution of an injection molding machine by 1 screen display. It is a flowchart of control which starts a production switching sequence. It is a figure explaining the algorithm of a mold clamping part production switching sequence. It is a figure explaining the algorithm of an injection part production switching sequence.

Explanation of symbols

1 Controller 2 Processor 3 Bus 4 Servo Interface 5 Servo Amplifier 6 ROM
7 RAM
DESCRIPTION OF SYMBOLS 8 Input / output interface 9 Input device interface with display device 10 Input device with display device 11 Input button 20 Movable platen forward / reverse motor 21 Rear platen 22 Ejector forward / backward motor 23 Movable platen 24 Tie bar 25 Fixed platen 26 Shield plate 27 Cylinder 28 Hopper 29 hopper shutter 30 the screw rotating motor 31 screw forward-reverse motor 32 screw 33 toggle mechanism 34 ejector mechanism 35 mold M injection molding machine M _b machine base M _c clamping portion M _i exit portion V1 production switching sequence registration screen V2 execution state display screen pcb Production switching sequence button cw Mold clamping part setup display window iw Injection part setup display window cb Mold clamping part setup confirmation button ib Injection part setup confirmation button

Claims (4)

In a control device for an injection molding machine having a production switching function for executing a setup sequence after production completion according to a preset sequence,
The control device has a display device;
On the display screen of the display device,
First display means for displaying the execution state of the setup sequence of the mold clamping part of the injection molding machine; second display means for displaying the execution state of the setup sequence of the injection part of the injection molding machine;
Means for displaying a mold clamping part setup confirmation button for manually starting a setup sequence next to the setup sequence of the mold clamping part;
Means for displaying an injection unit setup confirmation button for manually starting the setup sequence next to the setup sequence of the injection unit,
The mold clamping part setup confirmation button activates the next setup sequence of the mold clamping part independently of the injection part setup sequence, and the injection part setup confirmation button activates the injection part independent of the mold clamping part setup sequence. A control apparatus for an injection molding machine having a production switching function, wherein the next setup sequence is individually activated.   2. The input button connected to the control device is used instead of displaying the mold clamping unit setup confirmation button and the injection unit setup confirmation button on a display screen of the display device. Control device for injection molding machine with production switching function.   The setup sequence of the mold clamping unit includes at least mold removal and mold installation work, and the setup sequence of the injection unit includes at least an injection unit retraction and a purge operation. Control device for injection molding machine with production switching function.   The first display means is means for displaying the execution state of the setup sequence of the mold clamping unit in a window format on the display screen of the display device, and the second display means is a display sequence of the injection unit on the display screen. The control device for an injection molding machine having a production switching function according to any one of claims 1 to 3, wherein the control unit is a means for displaying an execution state in a window format.

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