JPS6317018A - Injection molder equipped with temperature display - Google Patents

Abstract

PURPOSE:To make the instant judgement of present temperature value being whether within its allowable range or not possible by a method wherein the set points of temperature at respective temperature control points are compared with their present values so as to display the present values in color, which is changed whether the present value lines within the allowable range of the set point or not, on a color display. CONSTITUTION:A ROM 15, in which temperature display controlling program and the like are memorized, is connected to a CPU 12 for PMC. A shared RAM 18 has respective storage regions to store the present value CT1 of a movable mold, the present values CT4integral nCTn+3 of cylinders 1-4 and the like. The present values just mentioned above are detected by respective temperature sensors KT1, TH1-TH4 and the like so as to be written in the predetermined regions. A CPU 11 for NC writes key codes corresponding to temperature setting-display keys to the spared RAM 18. Next, the CPU 12 for PMC displays the temperature setting-display pictures on the display screen of a CRT/MD I 20. In addition, the respective present temperatures are displayed in red, when they exceed the allowable upper limit temperature (STi+alpha), in blue, when they are below the allowable lower limit temperature (STi-alpha) and in gree, when they are within the allowable limit with respect to the respective set points STi.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an injection molding machine, and more particularly to an injection molding machine capable of displaying the current temperature of a heating cylinder for each injection molding machine.

Conventional technology injection molding machines are usually divided into multiple heating zones and heat cylinders to melt the resin of the molding material, but since the melt viscosity of the molding material varies greatly depending on the temperature, it is necessary to maintain the set temperature accurately. It is necessary to control the temperature to avoid producing defective molded products with cracks, sink marks, etc. In a conventional injection molding machine, the temperature of the multiple heating zones of the heating cylinder is set by setting the set temperature of each heating zone, that is, each temperature control point, using a digital switch installed in the control section of the injection molding machine.
I! The current value of each control point was displayed using an analog meter. A method has also been developed in which the CR7 screen is used, the temperature is set from the keyboard, and the current value of each temperature control point is digitally displayed as numerical values on the CR7 screen (Japanese Patent Application No. 103908/1982).

Problems to be Solved by the Invention As mentioned above, when the current temperature in the heating zone of the heating cylinder is displayed in an analog manner using a meter or digitally displayed as a numerical value on the CR7 screen, the current temperature in each heating zone is determined from the set value and the allowable value. To check whether the value is close to the possible set value, it is necessary to accurately read the position of the meter needle or read the digitally displayed value and compare it with the set value to confirm whether it is within the allowable range.

Particularly in the case of a digital numerical display, it is difficult to immediately determine whether the read current value is within the allowable range of the set value.

Therefore, an object of the present invention is to immediately display whether or not the current value of each temperature control point is within the allowable range of the set value when the current temperature of each temperature control point of a heating cylinder, etc. is displayed digitally. The purpose is to provide injection molding with a temperature display that can be determined.

Means for Solving the Problems FIG. 1 is a block diagram of means for solving the above problems adopted by the present invention.The present invention at least displays the current temperature of each temperature control point of the heating cylinder numerically. In an injection molding machine, there is a set value storage means A that stores the set value of each temperature control point, a temperature detection means B that detects the current temperature of each temperature control point, and a current temperature detected by the temperature detection means B. A current value storage means C for storing the current value, a judgment means for judging whether or not the stored current value of each temperature control point is within an allowable range with respect to the set value, and a judgment result by the judgment means is within the allowable range. By providing a color display device fiE that changes the color of the current temperature display depending on whether the current temperature is
The above problem was solved by making it easy to see whether the current temperature is within the allowable range for the set value.

Operation The temperature at each temperature control point is sequentially detected by the temperature detection means B and stored in the current value storage means C. The judgment means C reads the set value of each temperature control point from the set value storage means A, and also reads the current value of the temperature control point from the current value storage means C, and compares the set value and the current value. The color is changed depending on whether the current value is within the allowable range of the set value and the current value is displayed on the color display device @E.
Display in .

Embodiment FIG. 2 is a block diagram of an embodiment of the present invention, in which 1 is a heating cylinder, 2 is a screw, and 81 to B3 are band heaters as heating means installed on the outer periphery of the heating cylinder. is divided into a plurality of heating zones and heated by the band heaters B1 to B3, respectively, and in this embodiment, only three band heaters B1 to B3 are shown. Further, NB is a band heater of the nozzle portion. TH1
~TH4 is a temperature sensor serving as a temperature detection means for detecting the temperature of each heating zone provided corresponding to each band heater NB, 81~B3. The heating cylinder 1 is controlled to maintain a temperature suitable for the material used. , 5 is a movable side mold, 6 is a fixed side mold, and KTl
, KT2 is a mold temperature sensor provided in each mold.

3 is a heater power supply for the band heaters NB, [31 to B3, which heats each of the band heaters NB, Bl to B3 via switches SW1 to SW4, and opens and closes the switches SW1 to SW4. The time is determined by the output circuit 2 of the numerical control device (hereinafter referred to as the NC device) 10 that controls the injection molding machine.
It is controlled by the NC device 10 via 2.

4 are the outputs of each temperature sensor TH1 to TH4 and the mold temperature sensor KT1. Each temperature sensor KT1.
KT2. The signals from TH1 to Tl-14 are sequentially input in sequence, and the input signals are converted into digital signals.
It outputs a channel signal (signal indicating which temperature sensor) and data (temperature information) obtained by converting the temperature of that channel into a digital signal to the input circuit 21 of the NC device.

The NC device 10 is a microprocessor for NG (hereinafter referred to as CP).
It has a CPU 12 for a programmable machine controller (hereinafter referred to as PMC),
The PMC CPU 12 stores a temperature display control program, an injection molding machine sequence program, etc., which will be described later.
OM15 is connected, and NC CPLJ11 has a ROM that stores a management program that controls the entire injection molding machine.
14 and for injection, clamping, and screw rotation.

A servo circuit 17 for driving and controlling a servo motor M for each axis such as an ejector is connected via a servo interface 16 . Note that only one servo motor M and one servo circuit 17 are shown in FIG. In addition, 18 is a non-volatile shared RAM with a backup power supply,
It stores programs for controlling each operation of the injection molding machine, various setting values, parameters, etc. to be described later. 20 is a manual data input device with a color display (hereinafter referred to as CRT/
(referred to as MDI), 20a is a command key, numerical value and alphabet keys for giving various commands, and 20b is a soft key. The CRT/MDI 20 is connected to a bus arbiter controller (hereinafter referred to as BAC) 13 via an operator panel controller 19.
AC13 has CPU11 for NG and CPU12 for PMC.
．． Shared RAM18. Input circuit 21. Each bus of the output circuit 22 is connected, and the BAC 13 controls the buses to be used. The input circuit 21 is for inputting a channel signal output from the A/D converter 4 and data for converting temperature information in that channel into a digital signal. In addition, the output circuit 22 is connected to switches SWI to SW.
The closing time of 4 is output to each of the closing switches SW1 to SW4. Note that 23 is a RAM used by the NG CPU 11 to temporarily store data during various processes, and 24
is a RAM used by the PMC CPU 12 to temporarily store data during various processes. .

As shown in FIGS. 3(a) and 3(b), the shared RAM 18 includes an area for storing set values for temperature control of each temperature control point, and an area for storing current values of each temperature control point. FIG. 3(a) is an explanatory diagram of the area of the shared RAM 18 for storing the setting ta for cylinder temperature control, in which the movable mold temperature set value STI, the fixed mold temperature Set value ST2. Nozzle temperature set value ST3. Set value ST4 of the temperature control point of the first cylinder consisting of a band heater and temperature sensor set. Similarly, set value ST5 of the temperature control point of the second cylinder. ...has an area for storing the set value STn+3 of the n-th cylinder temperature control point.Furthermore, the shared RAM 18 has an area for storing the set value STn+3 of the n-th cylinder temperature control point.
As shown in , the current value CT1. of the movable side mold. Current value CT2 of fixed side mold. Nozzle current value CT3. Cylinder 1~
It has an area for storing the current values CT4 to CTn+3 of temperature sensors KT1 to CTn+3, respectively. KT2. TH1~T
Detected by H4, A/D converter 4. The data is read via the input circuit 21 at regular intervals and written to a predetermined area of the shared RAM 18.

In the above configuration, the mold and the nozzle part.

Temperature settings for each temperature control point of the heating cylinder.

When trying to change the set temperature or monitor the current temperature,
When the temperature setting/display key in the soft key 2Ob of the CRT/MD I 20 is pressed and input, the NC CPUII detects this and writes the key code corresponding to the temperature setting/display key in the shared RAM 18. Next, CPtJ for PMC
12 reads the key code written in this shared RAM 18, reads the program corresponding to the key code, that is, the temperature setting/display program from the ROM 15, and
Temperature setting and display screen are displayed on the display screen of RT/MD I 20. FIG. 4 shows an example of what is displayed on the display screen of the CRT/MD I 20, that is, pictures of the mold, nozzle, heating cylinder, setting values, and the display field of the current 1a are displayed, as well as the shared RAM 18. Read the set temperatures 8-1 to STn+3 of each temperature control point from the set temperature storage area of , and write the set temperatures ST1 to STn+3 in the field corresponding to each temperature control point in the set value display field 102 on the display screen of the CRT/MD1120.
Display STn+3. This display method is the same as the conventional display method, and is not the gist of the present invention, so a description thereof will be omitted.

Next, the current temperatures CT1 to CTn+3 of each temperature control point will be displayed.
The display processing is shown in FIG. First, CPLJ1 for PMC
2 sets the index i to "1" (step S1), and reads the set temperature STi and current temperature CTi for index 1 from the shared RAM 18. When the index i is "1", the movable mold setting value ST1. The current value CT1 is read (step 82). Then, read the current value C
It is determined whether Ti is within the allowable range ±α of the set value STi (steps 83 and 84), and if the current value CTi is within the allowable range, the display color of the current value CTi is set to green (step 85).
, the current value display column 102 of the CRT/MD I 120
The current 1st shift CTi is displayed. If the current 1iiICTi exceeds the allowable upper limit temperature (STi+α), which is the set value STi plus the allowable range +α, in step S3,
The current value display color is changed to red (step S6), and the current value is displayed (step 38). Also, in step S4, the current value C
If Ti is less than the allowable lower limit temperature a (STi-α)', the current value display color is changed to blue (step $7), and the current value display field 102 displays the current 1st shift in blue. next,
Add "1" to index 1 (step S9), determine whether the value of index i exceeds the number of temperature control points (n+3) (step 510), and if it does not, return to step S2 and add the value of the next temperature control point. Read the set value STi and current value CTi,
The processing from step 83 onwards is performed as described above. This process is repeated until the current temperature of the movable mold 5 is CT1, the current temperature of the fixed mold 6 is CT2, and so on. Nozzle current temperature CT3. Current temperature CT4 to CTn of each temperature control point of heating cylinder 1
+3 is displayed, and if each current temperature exceeds the allowable upper limit temperature (STi + α) for each set value, it is red, and if it is less than the allowable lower limit temperature (STi - α), it is blue, and the allowable value for the set value is displayed in red. If it is within the limit, it will be displayed in green.

When the value of the index i exceeds n+3 and the display of the current temperatures C1 to c"rn+3 for all temperature control points is finished (step 510), the CRT/M is used to change the set temperature.
It is determined whether or not the input key of DI20 is pressed (step 511); if not, step 81)
Repeat the following process.

If the operator presses the input key to change the set temperature of the temperature control point (step 511), the set temperature change process is performed (step $12), and after the process is completed, the process from step 81 onwards is performed again. , CRT/MD
While the temperature setting/display is displayed on the display screen of I20, repeat the process from step 81 onwards, and sequentially check whether the current temperature of each temperature control point is within, above, or below the allowable temperature with respect to the set value. The color will be changed accordingly.

Effects of the Invention As described above, in the present invention, depending on whether the current temperature of the temperature control point of each heating zone of the heating cylinder is within the allowable range of the set temperature set for each temperature control point, Since the display changes color, you can clearly see at a glance whether the current temperature of each temperature control point is within the allowable range of the set temperature, and even with a numerical digital display, you can compare the current value and set value one by one. Abnormalities can be quickly identified without the need to do so.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a means for solving the problems of the conventional technology adopted by the present invention, FIG. 2 is a block diagram of a main part of an embodiment of the present invention, and FIG. 3 is a shared RAM in the same embodiment.
FIG. 4 is an example of the storage state of set values, -, and current values stored in the same embodiment, FIG. 4 is an example of display on a color display device in the same embodiment, and FIG. 5 is an operational processing flowchart in the same embodiment. 1... Heating cylinder, TH1-TH4... Temperature sensor, KTl, KT2... Mold temperature sensor, 10...
・Numerical control device, 20...Manual data input device with color display Patent applicant Fanuc Co., Ltd. Agent Patent attorney Tsukasa Takemoto Matsu (and 2 others) Figure 1, Figure 3 (b)

Claims (4)

[Claims] (1) In an injection molding machine that displays at least the current temperature of each temperature control point of the heating cylinder numerically, there is a set value storage means for storing the set value of each temperature control point, and a set value storage means that detects the current temperature of each temperature control point. a temperature detection means; a current value storage means for storing the current temperature detected by the temperature detection means;
Judgment means for judging whether the current value of each stored temperature control point is within the allowable range with respect to the set value, and display of the current temperature depending on whether the judgment result by the judgment means is within the allowable range. An injection molding machine with a temperature display, characterized in that it has a color display device that changes and displays the temperature. (2) The above-mentioned color display device displays the current value by changing colors when the current temperature exceeds the permissible range, when the current temperature is within the permissible range, and when it is below the permissible range with respect to the set value. An injection molding machine with a temperature display according to scope 1. (3) The injection molding machine with a temperature display according to claim 1 or 2, wherein the color display device also displays the set values of each temperature control point stored in the set value storage means. (4) The injection molding machine with a temperature display according to claim 1, 2 or 3, wherein each temperature control point includes the movable side and fixed side molds.