JPH04249128A - Monitor data and molding condition printing method for injection molding machine - Google Patents

Abstract

PURPOSE:To print changed molding conditions together with various kinds of monitor data sensed during the printing process. CONSTITUTION:Whether the molding conditions are changed or not is decided (S1), and when any change is, the molding condition of said change is printed (S2). Then, counter C for counting the number of shots and register R are set '0' (S3).When the values of counter C and register R are different and the number of shots is increased, the value of counter C is stored in register R, and monitor data are printed (S4, S5 and S6). When the molding condition is not changed, monitor data of respective shots are printed successively in order, while when the molding condition is changed, monitor data after the change are printed after the molding condition of said change is printed, which makes the comparison of monitor data and molding conditions simple.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method for printing monitor data and molding conditions of an injection molding machine.

0002

2. Description of the Related Art In an injection molding machine, various types of data during one molding cycle are used, for example, in order to control the quality of the molded product molded by the injection molding machine or to check the molding state when determining molding conditions. From cushioning amount, injection time, metering time, metering completion position, and injection speed control to injection pressure control (
Values such as switching screw position and peak injection pressure (for example, , Japanese Patent Publication No. 61-114
832, JP-A-2-167717).

[0003] Furthermore, there is already a known device that prints the molding conditions each time the molding conditions are set or changed (Japanese Unexamined Patent Publication No.
(Refer to Publication No.-190424).

0004

[Problems to be Solved by the Invention] As mentioned above, there are known devices that print monitor data and molding conditions, but printing of monitor data and printing of molding conditions are performed independently. However, the only method available was to switch the mode of the monitor device or the control device of the injection molding machine and print each mode. Therefore, when determining molding conditions, or when changing molding conditions and observing changes in monitor data, it is necessary to change one of the many molding conditions and perform injection. Even if monitor data is printed or displayed to examine the molding state at the time, it is only printing or displaying the monitor data; it is necessary to change the molding conditions sequentially, inject sequentially, and record the monitor data for each injection (molding cycle). Even if it is printed, it is not possible to determine from the printed data alone how the molding conditions were changed based on the monitor data, making it difficult to correspond to the molding conditions.

[0005] Furthermore, if each time the molding conditions are changed, the changed molding conditions are printed, and then the monitor data is printed, the correspondence between the molding conditions and the monitor data becomes clear, and it becomes easier to determine the molding conditions. This is very useful for reference or to see how the monitor data changes when changing molding conditions. However, with conventional injection molding machines or monitor devices, printing of monitor data and printing of molding conditions must be done by changing modes, and printing of monitor data and molding conditions at the same time is troublesome and troublesome. be.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a printing method that prints both monitor data and modified molding conditions.

[0007]

[Means for Solving the Problem] A control device of an injection molding machine detects values representing various states of the molding process as monitor data, and at the end of each molding cycle, the control device causes a printer to print out the monitor data. Each time a molding condition change command is input, the control device prints the changed molding conditions following the monitor data, and then prints the subsequent monitor data. In addition, each time a molding condition change command is input, a counter that counts the number of molding cycles is reset, and the printer calculates the number of molding cycles performed under the changed molding conditions based on the value of the counter along with the monitor data. The above problem was solved by making the monitor data clear after changing the molding conditions.

[0008]

[Operation] During the molding cycle, the control device of the injection molding machine detects monitor data representing various states of the molding process, and causes the printer to print out the monitor data each time one molding cycle is completed. Furthermore, when the control device detects that a molding condition change command is input, it causes the printer to print the molding conditions input at that time. Therefore, it can be clearly determined at a glance that the monitor data printed after printing the molding conditions is injection molding data under the changed molding conditions, and the molding conditions at that time. In addition, by resetting the counter that counts molding cycles each time the molding conditions are changed and printing the value of this counter together with the monitor data, the monitor data after changing the molding conditions becomes clear and It becomes clear how many times the data was monitored after changing the molding conditions.

[0009]

[Embodiment] Fig. 2 is a diagram showing an electric injection molding machine adopted in an embodiment of the present invention and the main parts of the control system of the injection molding machine.
Reference numeral 1 is a screw, and reference numeral 2 is an injection servo motor that drives the screw 1 in the axial direction. In addition, a pulse coder 3 is attached to the injection servo motor 2 to detect the current position of the screw 1, and the screw 1 is equipped with a pressure sensor that detects the resin pressure by the reaction force acting in the direction of the screw axis. 4 is provided.

Further, reference numeral 100 is a numerical control device (hereinafter referred to as an NC device) for controlling the injection molding machine, and the NC device 1
00 has a microprocessor (hereinafter referred to as CPU) 112 for NC and a CPU 114 for programmable machine controller (hereinafter referred to as PMC).
The C CPU 114 has a ROM 117 that stores sequence programs etc. that control sequence operations of the injection molding machine.
, PMC RAM 11 used for temporary storage of data, etc.
0, a pressure data RAM 108 and a screw position data RAM 109 are connected. NC CPU11
A servo interface 111 is connected to a ROM 115 that stores a management program for controlling the injection molding machine as a whole, and a servo circuit 103 that drives and controls servo motors for each axis for injection, clamping, screw rotation, ejector, etc. connected via. In addition, in FIG. 2, a servo motor 2 for injection and a servo circuit 10 of the servo motor 2 are shown.
Only 3 is shown.

[0011] Also, 105 is a non-volatile shared RAM composed of bubble memory or CMOS memory, which stores a memory section that stores NC programs etc. that control each operation of the injection molding machine, and various setting values, parameters, and macro variables. It has a setting memory section for storing settings. 113 is a bus arbiter controller (hereinafter referred to as BAC), and the BAC 113 has an NC
CPU 112 for PMC and CPU 114 for PMC, shared RAM
105, an input circuit 106, and an output circuit 107 are connected to each other, and the BAC 113 controls the buses used. An address generator 118 is connected to the output circuit 107.

Further, 118 is a manual data input device with a CRT display (hereinafter referred to as CRT/MDI) connected to the BAC 113 via the operator panel controller 116, and various setting screens and work menus are displayed on the CRT display screen. By displaying the screen and operating various operation keys (soft keys, numeric keys, etc.), various setting data can be input and setting screens can be selected. Furthermore, a printer 120 is connected to the operator panel controller 116. In addition, 104 is a CPU for NC.
The RAM is connected to the bus 112 and is used for temporary storage of data. The servo circuit 103 is connected to the injection servo motor 2, and the output of the pulse coder 3 is input to the servo circuit 103. Also, the output circuit 107
A torque limit value for controlling the output torque of the injection servo motor 2 is outputted from the servo circuit 103 .

The setting memory section of the shared RAM 105 stores various molding conditions such as injection, holding pressure, and metering, and the NC device 100 stores the NC program stored in the shared RAM 105 and the various molding conditions described above, as well as the ROM 117. By the stored sequence program, CP for PMC
While U114 performs sequence control, the NC CPU
112 distributes pulses to the servo circuits 103 of each axis of the injection molding machine via the servo interface 111 to control the injection molding machine.

Furthermore, in this embodiment, the output of the pressure sensor 4 which detects the resin pressure by the reaction force acting on the screw 1 is connected to the A/D converter 101, and the A/D converted resin pressure is sampled. The pressure data is sequentially stored in the RAM 108 for each sampling period, and the number of output pulses from the pulse coder 3 is also sequentially accumulated by the counter 102 and stored in the screw position data RAM 109 for each sampling period. At this time, the resin pressure stored in the pressure data RAM 108 and the screw position stored in the screw position data RAM 109 are determined by the command from the address generator 118 for each R.
The information is stored in correspondence with the same AM address.

Next, the operation of this embodiment will be explained. first,
The operator uses the soft keys, numeric keys, etc. of the CRT/MDI 118 to control the operator panel controller 116, B.
Various molding conditions are set in the setting memory section of the shared RAM 105 via the AC 113. At this time, each time molding conditions are input, the PMC CPU 114 sends information to the printer 1 via the BAC 113 and the operator panel controller 116.
20 to print the input molding conditions.

Next, a test shot will be performed to adjust the molding conditions to mold a good molded product. When a molding operation command is given, the PMC CPU 114 will control the molding process from the start of mold closing to the completion of mold opening. Monitor data such as the time for one cycle, the injection time from the start of injection to switching to holding pressure, and the measurement time from the start of measurement to the end of measurement are measured and stored (measurement of these monitor data has already been carried out in JP-A No. 16
7717, so the details will be omitted). Further, in response to the injection start command, the address generator 118 is driven to sequentially address the RAMs 108 and 109 starting from the first address.

On the other hand, the pressure sensor 4 and the pulse coder 3
detects the resin pressure acting on the screw 1 and the position of the screw 1, and detects the resin pressure and the position of the screw 1 at each sampling period after inputting the injection start signal via the A/D converter 101 and the counter 102. The screw position is sequentially stored in the addresses of the pressure data RAM 108 and the screw position data RAM 109 designated by the address generator 118. and,
The screw position at the time when the pressure holding process is completed is read from the screw position data RAM 109, the cushion amount is determined and memorized, and the maximum resin pressure is calculated from the resin pressure stored in the pressure data RAM 108 at the end of one molding cycle. Detected and stored as pressure. Also,
The PMC CPU 114 increments a counter C that counts the number of shots (injection number) every time one molding cycle is completed.

On the other hand, the PMC CPU 114 executes the process shown in FIG. 1 at predetermined intervals, and first determines whether or not the molding conditions have been changed (step S1). In other words, when the operator tries to change the molding conditions, the CRT/MD
When the CRT screen of I119 is set to the molding conditions screen and the molding conditions are changed and input, the PMC CPU 114 detects this input and determines that the molding conditions have been changed. Once the molding conditions have been changed, the changed molding conditions are printed by the printer 120 (step S2), and the counter C that counts the number of shots and the register R that stores the number of previous shots are reset. 0'' (step S3). Then, it is determined whether the value of the counter C and the value of the register R match or not, and it is determined whether the number of shots has increased (step S4). If the values match, the processing for the cycle is ended. Further, if the molding conditions have not been changed, the process moves from step S1 to step S4, and steps S2 and S
Processing 3 is not performed.

Furthermore, since the value of the counter C increases when one molding cycle is executed, the value of the counter C and the value of the register R are different, and the process moves from step S4 to step S5, where the value of the counter C is changed to the value of the register R. The printer 120 prints the stored monitor data for the molding cycle together with the value stored in the counter (step S6), and the process ends. As a result, unless the molding conditions are changed, each time the molding cycle ends, the count C and the value in the register R no longer match in step S4, so that the monitor data for each molding cycle is printed. Then, when the molding conditions are changed, the changed molding conditions are printed (step S2), and the counter C and register R become "0". When the molding cycle ends, the counter C increments and the value of the register R becomes "0". Since the value is different from the value, the monitor data for that molding cycle is printed together with the value of counter C.

That is, the molding conditions are printed first, and then each time a molding cycle ends, the number of shots and monitor data for that molding cycle are printed, and when the molding conditions change, the changed molding conditions are printed, and then The monitoring data of the molding cycle will be printed. For example, if the injection speed in the molding conditions is changed from 100 mm to 95 mm, injection is performed, and then the back pressure of the second stage in the metering process is changed from 60 Kg to 65 Kg. , will be printed as follows.

[0021] Number of shots Cycle time Peak pressure Injection time Metering time ………… 1
12.0 1220 1.
4 6.2 ………… 2
12.0 1220 1.4
6.2 …………3
12.2 1220 1.4
6.2 ………… :
: :
: : : :
: :
: : : :
: Injection conditions; switching position 2 100mm → 95m
m Number of shots Cycle time Peak pressure
Injection time Measuring time ………… 1
12.1 1200 1
．． 3 6.2 ………… 2
12.1 1200 1.
3 6.2 ………… :
: :
: : : :
Measurement conditions: Back pressure 2 60Kg → 65Kg Number of shots Cycle time Peak pressure Injection time
Weighing time ………… 1
12.2 1200 1.3
6.5 ………… 2
12.1 1200 1.3 6
．． 5 ………… :
: : : :
: : When the molding conditions are changed in this way, the changed molding conditions are printed, and then the monitor data for the subsequent molding process is printed, so you can check the molding condition setting work and the changes in the monitor data when the molding conditions are changed. This is very convenient for viewing etc.

When performing continuous molding, the above monitor data may be printed, but normally the monitor data is not printed and the process shown in step 1 is performed by inputting a print command only when necessary. The process may be started and the monitor data and changed molding conditions may be printed.

[0023] In addition to the above-mentioned monitor data, the temperature of the heating cylinder (usually the temperature of the heating cylinder is automatically controlled, so the temperature detected by the temperature sensor installed in each heating zone of the cylinder) These temperatures can also be detected because they are A/D converted and input to the input circuit 106), outside temperature, outside air wind speed, etc.
Something related to the quality of a molded product is detected and printed as monitor data.

Furthermore, instead of the printer 120, a central management device is connected to the operator panel controller 116 to collectively manage a large number of injection molding machines, and monitor data and molding condition changes for each injection molding machine can be controlled by the central management device. You may also print using a printer connected to the
Various statistical processing can also be performed based on the monitor data.

[0025]

[Effects of the Invention] In the present invention, various monitor data are printed for each molding cycle, and if there is a change in molding conditions, the changed molding conditions are printed, and then the monitor data for the subsequent molding cycle is printed. This makes it clear under what molding conditions the printed monitor data corresponds to the molding cycle, and this printed data can be referenced when determining the molding conditions (determining the molding conditions). It is only necessary to change the molding conditions, and the work of determining the molding conditions can be carried out very easily.

Furthermore, when changing the molding conditions and looking at changes in the monitor data, the contents of the changed molding conditions and the monitor data before and after the change in the molding conditions can be seen at a glance, making comparison easy and convenient. Furthermore, by printing the number of shots printed in order from ``1'' along with the monitor data each time the molding conditions are changed, it becomes clear which type of change in molding conditions the monitor data is from, making it easier to see the printed data. .

[Brief explanation of the drawing]

FIG. 1 is a flowchart of monitor data and changed molding condition printing processing according to an embodiment of the present invention.

FIG. 2 is a block diagram of the main parts of the electric injection molding machine and the main parts of the control device implementing the same embodiment.

[Explanation of symbols]

1 Screw 2 Injection servo motor 3 Pulse coder 100 Numerical control device 119 Manual data input device with CRT display (CR
(referred to as T/MDI) 120 Printer C Counter R Register

Claims (2)

[Claims] Claim 1: A control device of an injection molding machine detects values representing various states of the molding process as monitor data, prints the monitor data on a printer every time one molding cycle is completed, and inputs a command to change molding conditions. Monitor data and molding of an injection molding machine that detects the change command every time the molding conditions are changed and prints the changed molding conditions on the printer following the monitor data to clarify the monitor data after changing the molding conditions. Conditional printing method. 2. Each time a command to change molding conditions is input, the control device resets a counter that counts the number of molding cycles, and calculates the number of molding cycles performed under the changed molding conditions together with the monitor data. 2. The method for printing monitor data and molding conditions for an injection molding machine according to claim 1, wherein the printer prints the data based on the value of the counter.