JP3616939B2 - Method of outputting measured value data of hot press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for outputting various measured value data when hot plate temperature, surface pressure and vacuum pressure are increased and decreased during molding of a hot press having a long work cycle for molding a product.
[0002]
[Prior art]
A hot press generally includes a plurality of heat plates arranged in parallel in the vertical direction between a fixed platen and a movable platen, and a prepreg which is a material of a laminated product is positioned between the heat plates, and the movable platen is moved. A prepreg is thermocompression bonded.
[0003]
An example of this configuration will be described with reference to FIG. 7. The hot press 1 is attached to a box-shaped frame 11 mounted on a base 10, a cylinder 12 provided at a lower portion of the frame 11, and a ram 13 of the cylinder 12. Movable platen 14, upper platen 15 fixed to the upper part of frame 11 so as to face movable platen 14, and a plurality of hot plates arranged in parallel vertically between movable platen 14 and upper platen 15 16 and a carrier plate 18 on which a prepreg 17 (only one is shown in the drawing) is placed. Moreover, the hot press 1 may form a chamber sealed with a cover and evacuate the inside thereof.
[0004]
In such hot press molding, in the control unit (controller) of the apparatus, the molding conditions such as the heating temperature and surface pressure of the hot plate are set for a plurality of time intervals arbitrarily assigned within one work cycle. The pressure is set. In addition, on the temperature control device side of the device corresponding to this temperature setting, if necessary, by setting a timer for opening and closing the valve, it is possible to control a plurality of heating processes and cooling processes, Control in one work cycle is performed by numerical setting of time.
[0005]
These numerical values can be set by the operator while viewing the CRT screen by operating the setting panel, and the process of the procedure according to a predetermined program is searched from the molding condition list and selected.
[0006]
However, such hot press molding is performed, for example, in which one work cycle takes a long time of 120 minutes. Therefore, in this molding, the value of the product completed in one work cycle is very high, and the quality of the product greatly affects the productivity and cost increase.
[0007]
Therefore, it is very important to monitor each measured value data during one work cycle, in particular, various measured value data (molding data) when the hot plate temperature, the surface pressure and the vacuum pressure are increased and decreased.
[0008]
However, if all the molding data is output, a huge amount of data can be obtained depending on the output interval, and the recording paper and storage capacity in the printer or external memory that receives the molding data is proportional to the data amount. Increase. As a result, the analysis is difficult, and the cost, storage space, etc. increase, which is extremely uneconomical.
[0009]
In addition, if the output interval is widened and the number of data is reduced, the fluctuation state of the required control is not known, and it is not possible to determine under what molding conditions the processing is performed when a defective product occurs. Occur.
[0010]
For this reason, in the field of injection molding machines, for example, Japanese Patent Publication No. 7-4843 discloses a data output method for injection molding machines. In this disclosure, when outputting molding data of an injection molding machine, molding data including an error content in a shot in which molding failure has occurred and molding related to a specified number of shots immediately before and / or immediately after the shot. Only data is output sequentially.
[0011]
In this data output method, the molding data is sequentially detected according to the operation of the injection molding machine and is temporarily stored in, for example, a controller attached to the injection molding machine. On the other hand, when a molding defect occurs, only molding data relating to the generated shot and a plurality of parameters related to a predetermined number of shots before and after this shot are designated and sequentially output. That is, only a part of necessary data is extracted and output from all the molding data.
[0012]
In this case, the molding data related to the shot in which the molding defect has occurred includes error details such as error code, error occurrence time, error name, etc., so that the cause of the abnormality can be analyzed easily and accurately. Can be done.
[0013]
[Problems to be solved by the invention]
However, hot press products are manufactured by placing prepregs between a large number of hot plates and thermocompression bonding, and the molding time is long and one shot like a product molded by an injection molding machine. The object to be controlled is different from that having a short molding time.
[0014]
That is, in the hot press, with respect to one molding condition, for example, the hot plate temperature, the temperature setting is changed in multiple stages within one work cycle time, and a predetermined temperature holding step and a transition of temperature rise and fall during that time are performed. In each step, PID control is required individually, and it is necessary to detect the abnormality of the control and output data that captures the signs until the alarm is generated, so that countermeasures and corrections can be made at an early stage. Don't be.
[0015]
Therefore, it is desirable to reduce the actual measurement data in the section where the parameters of the molding conditions can be held in a stable state, and to increase the actual measurement data in the section where the fluctuation is large.
[0016]
In view of such circumstances, the present invention provides a data output of a hot press that outputs only necessary data by changing the output interval of measured data of molding conditions that change every moment during one hot press work cycle. It aims to provide a method.
[0017]
Also, as another purpose, before and after the hot press alarm is generated, the output interval of such measured data is arbitrarily set, and at the time of alarm due to the occurrence of hot press abnormality, the interval time before and after that can be narrowed and output. It is to provide a data output method.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, the present invention sets molding conditions such as temperature and pressure at arbitrary time intervals through a controller for a molding time of one work cycle determined in advance in a hot press. A method of outputting measured value data in at least one set section arbitrarily determined within the one work cycle based on molding conditions ,
(a) determining a control pattern of the molding conditions set for the one work cycle time;
(b) For a plurality of sections determined by the output timer and assigned in accordance with the control pattern, an output interval of data required in at least one set section arbitrarily determined is set,
( c) Out of the measured value data stored in the storage device at the sampling interval of the minimum setting unit, only the necessary data is output via the controller at the output interval of the data.
The output interval of the data can be individually changed so that more actual measurement data can be output in a set section having a large fluctuation range with respect to time with respect to the molding condition .
[0019]
As a result, the measured values of various data such as temperature, pressure, etc. that change every moment during one cycle can be printed at a frequency required to output the data only in the arbitrarily set interval, by a printing device, CRT screen, or communication by a personal computer. And so on.
[0020]
This output method is as described in each claim, but according to the configuration of claim 2 , the data output interval is increased and the constant temperature continues for a long period of rising temperature change where the temperature changes rapidly. The section and the section of the cooling process are characterized by reducing sampling .
[0021]
Further, according to the third aspect, among the actual measurement value data stored in the storage device, the actual measurement value data for an arbitrary time ( P) is always stored in the storage device, and is determined based on the molding conditions. In the set section, when an alarm indicating an abnormality in the molding operation is generated, the predetermined section before and after the alarm is generated, and the determined output interval of the measured value data is changed to be narrowed.
[0022]
In this case, it is possible to set an arbitrary time P (minute) before the alarm is generated and an arbitrary time Q (minute) after the alarm is restored, and always store the measured data only for the time P (minute). Can solve the problem.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. According to the method of the present invention, in press molding using a hot press, measured data such as the temperature and surface pressure of a hot plate that changes every time in one work cycle is transferred to an output device such as a personal computer by a printer device or communication. This is the output method.
[0024]
This data output is usually a printout output to be printed on paper, a hard copy output to display data on a CRT screen, an RS-232C output to be transmitted to a terminal computer, or simultaneously output to all output devices. Can be selected.
[0025]
The operator first sets parameters for the molding conditions on the CRT screen. In this setting, as shown in FIG. 1, for example, a desired temperature pattern (curve X) is determined by setting a hot plate temperature for one work cycle time.
[0026]
Then, based on the molding condition of this temperature change, at least one setting section arbitrarily set by the output timer, which is arranged at the lower left of the CRT screen of FIG. For the sections A to E, the output interval of necessary data is determined.
[0027]
In this case, in one work cycle time of the hot press, data is output for all assigned sections, and the output interval of the data is individually set. However, this data output is not only for grasping the whole according to the work conditions, but it is only necessary to obtain data of only necessary portions in one work cycle time. A person can arbitrarily change an arbitrary number of setting intervals and data output intervals of the intervals.
[0028]
In the present embodiment, it is necessary to monitor temperature more strictly with respect to the rising section (A, C) of the temperature change where the temperature changes rapidly, and the section D in which the constant temperature continues for a long time or the cooling process. For the section E, the sampling is reduced.
[0029]
The temperature setting in this example employs the temperature pattern shown in FIG. That is, in the section A (0 to 15 minutes), the heating 1 determined by the timer setting arranged in the right column of FIG. 2 is executed, and the temperature is raised to 40 to 120 ° C. In section B (15 to 30 minutes), heating 2 is performed and the temperature is maintained at 120 ° C. In section C (30 to 45 minutes), heating 3 is performed and the temperature is raised to 120 to 180 ° C. In section D (45 to 90 minutes), heating 4 is performed and the temperature is maintained at 180 ° C. Further, in the E section (90 to 120 minutes), the heating 5 is omitted, and the cooling control is performed with the cooling 1 similarly determined by the timer setting of FIG. 2 for 90 to 100 minutes. The cooling plate 4 is subjected to different cooling steps for 100 to 110 minutes, 110 to 119 minutes, and 119 to 120 minutes, respectively, and the hot plate temperature is lowered to the original 40 ° C.
[0030]
In this way, each turning point of the heating temperature is determined, and a temperature setting pattern required by the operator is determined.
[0031]
Each numerical value shown in the chart of FIG. 2 is displayed on the CRT display screen, and is set using the control means and the input / output device shown by the control block of the hot press in FIG.
[0032]
This control block includes a controller 2, detection means such as a temperature sensor, a CRT display 3, a setting panel 4, a storage device 5, a printer 6, and the like.
[0033]
The controller 2 displays on the CRT display 3 each setting value of the molding conditions set by the operator through the setting panel 4, and controls the hot press molding conditions according to these setting values. In addition, the controller 2 stores and stores actually measured value data obtained from detection means such as a temperature sensor in the storage device 5. Furthermore, actual value data required by the operator can be output to the printer 6 according to the print output interval set on the setting panel 4.
[0034]
The setting panel 4 is a keyboard provided with various numeric keys, function selection keys, and the like. The molding conditions are set, the print output is selected, and the data output interval (print output interval is indicated on the display screen of FIG. 2). ) Or the like can be set individually, or patterns already set can be selected and displayed from the molding condition list.
[0035]
That is, in the setting value printing selection for printing out, the operator selects one of four selections arranged in the upper part of the screen of FIG. 2, that is, molding conditions, molding condition list, and machine sets 1, 2, and 3. To do. The printout of the actual measurement data for printout / hardcopy can be selected from 0 = OFF, 1 = printout, 2 = hardcopy, 3 = RS-232C, 4 = simultaneous output.
[0036]
In the printing when an alarm is generated during hot pressing and the automatic printing of actual measurement values during pressing, each setting section determined by the output timer and the data output interval in that section are set.
[0037]
Further, the column on the right side of the CRT screen shown in FIG. 2 displays the temperature, surface pressure, and heating and cooling timer times of the heat source supplied to the hot plate set on the setting screen of FIG.
[0038]
As described above, the numerical values of the molding conditions set by the operator on the setting panel 4 are input to the CRT display 3 via the controller 2, and the measured value data during the hot press operation is the temperature of the hot press 1. The data information detected from the sensor group is stored in the storage device 5 at the time interval of the minimum setting unit according to the command of the controller 2.
Here, with respect to the set temperature condition, the data output of the actual measurement value actually detected from the temperature sensor or the like was output at any time only at a certain time interval, depending on the setting of the interval, The most necessary data is not available, or the amount of data is very large and editing is difficult.
[0039]
In order to solve this, in the present invention, on the printout screen, the control state is changed by changing the output interval of measured value data for one or a plurality of set sections arbitrarily determined in one cycle. Only necessary data in the section you want to know can be output.
[0040]
For this reason, in this embodiment, the print output intervals in the sections A to E are 0.5 minutes and 1.0 minutes, respectively, in accordance with the desired sampling number for each section corresponding to the temperature setting pattern. , 0.5 minutes, 5.0 minutes, and 10.0 minutes.
[0041]
Further, the setting of the surface pressure acting between the hot plates is determined in accordance with the temperature setting, for example, so as to draw a curve Y indicated by a broken line in FIG.
[0042]
The data sampling interval in the present embodiment is 0.1 minutes, which is the minimum setting unit of the timer, and the measured value data of the molding conditions is sequentially stored in the storage device at this time interval. In FIG. 4, the controller 2 receives the detection signal from the temperature sensor group provided in the hot press 1 in FIG. 4, and the data is sequentially stored and stored in the storage device 5.
[0043]
Therefore, the data output interval set for each set section is read out according to the desired print output interval from the actually measured value data stored every 0.1 minute in the storage device according to the command from the controller 2. Thus, only necessary data is directly printed out to a predetermined output device, for example, the printer 6.
[0044]
Furthermore, in the present invention, when an alarm is generated due to abnormal molding conditions, an output interval that is finer than the output interval of the section is set so that data can be output more finely as shown in FIG.
[0045]
For this purpose, the arbitrary time P before the alarm is generated and the arbitrary time Q after the alarm is restored can be set in advance, and the measured value data for only the time P (minutes) is always stored in the storage device 5. It has become.
[0046]
For example, when the time P is set to 15 minutes and the time Q is set to 10 minutes in advance, as shown in FIG. 3, an alarm is generated 65 minutes after the start of molding, and the alarm state continues for 5 minutes. The initial setting is 15 minutes before the alarm occurs (50 minutes after the start of molding) and 10 minutes after the alarm is released (80 minutes after the start of molding), that is, 80-50 = 30 minutes. Even if the data output interval is 5 minutes, the time interval is reduced to 0.5 minutes so that the actual measurement data can be printed on the output device.
[0047]
As a result, when an abnormality occurs in the molding conditions, a larger amount of data necessary for the analysis can be output, and effective measures can be taken.
[0048]
In the above description, among the molding conditions, the setting of the heating temperature, which is particularly problematic, has been described in detail. However, other molding conditions such as the surface pressure, the position of the cylinder ram, the degree of vacuum in the chamber, etc. may be set. it can.
[0049]
In this case, in the control device of the hot press machine of the present invention, in order to specify each setting value input by the setting panel, as shown in FIGS. 5 and 6, the screen seen by the operator is simply switched. A plurality of various molding conditions can be displayed.
[0050]
In the setting screen 1 of FIG. 5, the temperature and the surface pressure of the hot plate are displayed in a graph, and the temperature setting and the surface pressure setting values with respect to the time interval at each inflection point that determines the setting pattern are shown. In the timer setting and alarm shown in the right end column of the screen, for example, in the A section (0 to 15 minutes) of heating 1, the allowable fluctuation range of temperature is ± 5 ° C., If this fluctuation range is exceeded, an alarm is generated. Similarly, the allowable fluctuation range is set to ± 1 ° C. in the B section of the heating 2, and ± 5 ° C. is set in the C section of the heating 3.
[0051]
In this way, when the temperature rises (A and C intervals), the monitoring is performed at ± 5 ° C. centering on the set value, and during the constant temperature control (B and D intervals), ± 1 centered on the set value. When the temperature drops (E section), it monitors ± 10 ° C centering on the set value, and especially where monitoring is required, the fluctuation range of the set temperature is reduced and the molding conditions vary. And when it deviates from the set range, it quickly catches it and outputs an alarm to stabilize temperature control in one work cycle.
[0052]
The setting screen 2 in FIG. 6 is a display for setting the position indicating the distance between the hot plates and the setting of the degree of vacuum in the chamber of the hot press machine.
[0053]
In the present embodiment, these molding conditions are not set. This screen includes selection of surface pressure control 1 and position control 0 as a backup control method, and further includes items of hydraulic pressure alarm setting and position alarm setting. In this oil pressure alarm setting, the applied pressure per unit area of the cylinder ram that raises and lowers the hot plate can be set. In this example, each holding process at the time of raising and lowering is ± 2.0 kg, pressurizing and cooling, The fluctuation range is set to ± 1.0 kg. In the position alarm setting, the fluctuation range of the cylinder ram position is set to ± 3.00 mm during the compression process and ± 2.50 mm during the holding process.
[0054]
As described above, in the present invention, a predetermined set value in the molding condition can be provided at an arbitrary time interval in each work cycle, and a predetermined set value can be set in accordance with each molding condition. The fluctuation range can be set to a desired range around the center, finely controlled at the required location, and as a result, the actual measurement data detected by the sensor provided in the hot press machine can be obtained at an appropriate frequency. it can. Moreover, when it deviates from the set molding conditions, an alarm can be output quickly, and the measured value data before and after that can be output to an output device such as a printer.
[0055]
【The invention's effect】
As described above, according to the method of the present invention, in the part where the fluctuation range with respect to time is large with respect to the molding conditions such as the heating temperature, more data actual measurement values are output, and particularly in the part where it is particularly necessary. In addition, when the fluctuation range exceeds the set range due to abnormal molding conditions, an alarm is generated and the measured value data before and after the alarm is generated at an interval narrower than the predetermined output interval. Can be output in detail. As a result, it is possible to ensure an appropriate amount of actually measured value data, and to analyze and take measures for molding defects and to set optimum molding conditions for the next cycle at an early stage.
[Brief description of the drawings]
FIG. 1 is a molding condition setting diagram showing a control pattern of measured value data of a hot press according to the present invention and a printing interval corresponding to each time interval.
FIG. 2 is a data chart for setting molding conditions and print output intervals according to the present invention.
FIG. 3 is a relationship diagram showing a section setting when changing a print output interval at the time of an alarm that occurs within the hot plate temperature forming condition according to the present invention.
FIG. 4 is a schematic configuration diagram showing a control block of a hot press according to the present invention.
FIG. 5 is a data chart showing a setting screen for temperature and surface pressure in one embodiment of the present invention.
FIG. 6 is a data chart showing a position and vacuum degree setting screen in one embodiment of the present invention.
FIG. 7 is a partial cross-sectional view showing a schematic configuration of a hot press machine having a conventional structure used in the method of the present invention.
[Explanation of symbols]
1 Hot Press 2 Controller 3 CRT Display 4 Setting Panel 5 Storage Device 6 Printer A to E Section

Claims (4)

The molding conditions such as temperature, pressure, etc. are set at arbitrary time intervals via the controller for the molding time of one work cycle determined in advance in the hot press, and arbitrary within the one work cycle based on the molding conditions. A method of outputting measured value data in at least one set section defined in
(a) determining a control pattern of the molding conditions set for the one work cycle time;
(b) For a plurality of sections determined by the output timer and assigned in accordance with the control pattern, an output interval of data required in at least one set section arbitrarily determined is set,
( c) Out of the measured value data stored in the storage device at the sampling interval of the minimum setting unit, only the necessary data is output via the controller at the output interval of the data.
The output interval of the data can be individually changed so that more actual measurement data can be output in a set section where the fluctuation range with respect to time is large with respect to the molding conditions. Method. The data output interval is increased for a rising period of temperature change where the temperature changes rapidly, and sampling is reduced for a period where a constant temperature continues for a long time and a cooling process period . Method. Of the measured value data stored in the storage device, the measured value data for only an arbitrary time ( P) is always stored in the storage device , and the molding operation is performed in a set section determined based on the molding conditions. 3. The method according to claim 1, wherein when an alarm indicating an abnormality occurs, the output is changed so as to narrow a predetermined interval before and after the alarm generation and a predetermined measured value data output interval. 4. The method according to claim 1, wherein the output of the measured value data includes at least one output format of recording, storing, displaying and communicating.

Images