JPH08309814A - Injection molding machine - Google Patents

Abstract

PURPOSE: To obtain an injection molding machine capable of easily regulating and manufacturing a non-defective molding even by an unskilled person. CONSTITUTION: The injection molding machine comprises a controller 2 connected to the machine, having a set panel and controlling a plurality of set variables of the machine according to the signal from the panel, and a failure improving unit 4 connected to the controller 2, having a display screen 5 and a keyboard 6, and sends a control signal to the controller 2 based on a plurality of molding failure types, failure degree, the presence or absence of the failure improvement, the regulating conditions of the variables and the sequence when inputting from the keyboard 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine for a plastic injection molding machine, which can improve molding defects by a simple operation.

[0002]

2. Description of the Related Art A conventional molding apparatus will be described with reference to FIGS.

In FIG. 9, a control device 2 having a setting panel 3 is shown.
Is connected to the injection molding machine 1 by a line 10. The operator sets and inputs the operating conditions of the injection molding machine 1 (conditions for adjusting setting variables) using the setting panel 3. Since the operating conditions of the injection molding machine 1 differ for each molded product, the molding operator sets the condition for each molded product. The work flow is shown in FIG. [5
After performing one shot molding in 1], the quality of the molding result is evaluated in [52], and the operating condition is changed in [53] for unsolved molding defects, and the setting is input. The operations from [51] to [53] are repeated until the molding result is satisfactory. The molding operator must carry out [52] and [53]. Therefore, the improvement of the defective molding depends on the ability of the molding operator, and only a skilled worker can succeed.

Further, in Japanese Patent Application No. 2-258710 and others, a molding defect improvement system utilizing an expert system has been announced. However, since it is necessary to respond to the expert system on many screens, the operation is troublesome and practical. It was difficult to convert.

[0005]

As described above, in the conventional technique, a skilled molding operator is required to improve the molding failure of injection molding, and when a molding failure occurs, a general molding operator fails to perform the molding failure. Could not be solved or it took a lot of time to solve. There was also no expert system for improving molding defects that could be easily put to practical use.

The present invention is intended to provide an injection molding apparatus which solves the above conventional problems.

[0007]

The present invention employs the following means to solve the above-mentioned problems. (1) In an injection molding machine having a control panel connected to an injection molding machine and controlling a plurality of setting variables of the injection molding machine by signals from the setting panel, a display screen and a keyboard connected to the control machine are connected. Possibility of sending a control signal to the control device when input from the same keyboard, based on a plurality of types of molding defects set in advance, the defect degree and presence / absence of defect improvement, and the adjustment conditions and order of the setting variables. Provide improvement equipment. (2) In the injection molding apparatus of the above (1), in the next operation, when there is no defect improvement and the input is ranked lower than the previous time, the preset setting input is the adjustment condition of the setting variable corresponding to the input. When the adjustment condition of the same setting variable spans more than one, the adjustment condition of the same setting variable is set as a weighted average by rank. (3) In the injection molding apparatus of the above (2), when the setting condition of the setting variable and the order of the setting are input in advance, when the type of the defective molding having the defective improvement is input at the next operation, the defective molding occurs. The adjustment conditions of the above setting variables and the rank are set to be higher. (4) In the injection molding apparatus of the above (1), a plurality of types of molding defects, a defect degree, presence / absence of defect improvement, and a plurality of sets of adjustment conditions and ranks of setting variables are provided, and one of them is selected.
Select the group and enter the settings in advance.

[0008]

[Action]

(1) In the above-mentioned invention 1, first, a predetermined degree of failure and adjustment condition and order of setting variables are selected and input for each type of molding failure using the display screen and the keyboard.
Then, when the molding operation is performed, the defect improving device sends a control signal to the control device based on the plurality of types of molding defects, the degree of defects, and the adjustment conditions and the order of the set variables input. The control device controls a plurality of setting variables of the injection molding machine according to the input and injects a molded product from the injection molding machine. By looking at this molded product, the operator determines the degree of failure and the presence / absence of failure improvement for each type of molding failure, and the display screen and the keyboard are used to determine the degree of failure and presence / absence of failure improvement for each type of molding failure, and the adjustment conditions for setting variables And select the order. Then, when the molding operation is performed, the defect improving apparatus sends a control signal to the control apparatus based on the plurality of types of the defective molding, the degree of the defect, the presence / absence of the defect improvement, the adjustment conditions and the order of the set variables. The control device controls a plurality of setting variables of the injection molding machine according to the input and injects a molded product from the injection molding machine.

When the above steps are repeated, even an unskilled worker can manufacture a molded product having all good types of defective molding in a short period of time. (2) In the above-mentioned invention 2, when the worker inputs the first time in the same manner as in the above (1), the same operation is performed. From the second time onward, input is performed in the same manner as in (1) above, but the input is performed as follows. As a result of the previous molding, the adjustment conditions and ranks of the same setting variables are set for the types of molding defects with defect improvement, and the adjustment conditions and ranks of the setting variables are lowered by one for the type of molding defects without defect improvement. And Then, when the former input is received, the defect improving apparatus operates in the same manner as the operation (1). When the latter input is received, a control signal is sent to the control device based on the adjustment condition and the order of the setting variable according to the input. At this time, when the adjustment condition of the setting variable and the adjustment condition of the setting variable of the rank are plural, a control signal is output based on the adjusting condition of the setting variable which is a weighted average by rank. The control device controls the set variable according to the input and injects the molded product from the injection molding machine.

When the above steps are repeated, even an unskilled worker can manufacture a molded product with all good types of defective molding in a short period of time. (3) In Invention 3, the first operation acts in the same manner as in (2) above. When a molding defect type with a defect improvement is input from the second time onward, control is performed based on the adjustment condition of the setting variable of the molding defect type and the adjustment condition of the setting variable of the combination in which the rank combination is increased by one. A signal is output from the defect remedy device. The control device controls the set variable according to the input and injects the molded product from the injection molding machine.

When the above steps are repeated, even an unskilled operator can manufacture a molded product with all good types of defective molding in a short period of time. (4) In the above invention 4, it is considered to be optimal for a molded product manufactured from a plurality of combinations of a plurality of types of molding defects, a defect degree and presence / absence of defect improvement, and adjustment conditions and order of setting variables from the display screen and the keyboard. Select and enter one set.

The subsequent operation is the same as in the above (1). Since the optimum one can be selected from a plurality of sets, even an unskilled worker can manufacture a molded product having all good defective molding types in a short period of time.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. It should be noted that the parts described in the conventional example are denoted by the same reference numerals and the description thereof is omitted, and the parts relating to the present invention will be mainly described.

In FIG. 1, a molding defect improving device 4 having a display screen 5 and a keyboard 6 is incorporated in the control device 2. As a preset input to the defect improving device 4, for example, as shown in FIG. 3, the degree of defect is large, medium, small, none, and the improvement status indicating whether there is defect improvement or not for each type of defect (defective type). Is improved, unchanged, or worse (see the explanation below for the square frame). Further, countermeasures (adjustment conditions for setting variables) and ranks are input for each defect type as shown in FIG.

In the above, when taking measures against molding defects, the molding operator does not need to change the operating conditions on the setting panel 3, and the molding operator operates the keyboard 6 to perform molding quality evaluation according to the display screen 5. With a simple entry,
Based on the input data, the molding defect improving device 4 automatically sends a control signal to the control device 2. Then, the control device 2 operates the injection molding machine 1.

FIG. 2 shows a processing flow for improving molding defects.
In the figure, first, one-shot molding is performed, the system automatically takes in the operation data, and the molding operator evaluates and inputs the defective condition of the molded product, and the system calculates the improvement of operating conditions. And automatically change the operating conditions according to the calculation result. Then, the process returns to and molding is repeated again under the corrected operating conditions.

The "operating data" in FIG. 2 is the value of operating condition variables (adjustment conditions and order of setting variables) such as cylinder temperature, metering stroke, injection speed / pressure. This "operation data" is used in the calculation of the improvement of the operation conditions in the same figure, and a part of the condition variable values are changed in the same figure.

In the "input of molding quality evaluation" of FIG. 2, FIG. 3 is collectively displayed on the display screen 5 of FIG. As shown in FIG. 3, in this collective input screen, <defective type>, <defective degree>, and <defective status> are all listed. For each <defective type>, <defective degree>
Select any one of large, medium, small, or none in the column, and select any of improved, unchanged, or deteriorated in the <improvement status> column. In the figure, the one surrounded by a square frame is an example in which the selection is input. However, in the case of the molded product of the first shot, since the operating conditions have not been changed, the <improvement status> is automatically unchanged (no input is required). The data input by the molding operator is only for this one screen.

Next, the database of the molding failure countermeasure means (adjustment condition and order of setting variables), which is the basis of the "calculation for improvement of operating conditions" in FIG. FIG. 4 shows an example of a list of countermeasures (adjustment conditions for setting variables) for one type of defective molding. This figure is for the type of defective molding "short shot". Countermeasures [1] ~

There are 9 of [9]. The X in the mathematical formulas in these countermeasures means the operating condition variable of the countermeasures. For example, the countermeasure [1] "increases the measuring stroke by 5 mm. However, if it exceeds 10% of the original measuring stroke, 1 of stroke
Just increase it. ". Each of the countermeasures is given a priority, and a set of all the defect types is called a "countermeasure set" and an example is shown in FIG. The countermeasures A1, A2, ... Of FIG. 5 are [1] of FIG.
~

[9] ..., and the priorities (ranks) are given as 1, 2, ... This priority is initially A1, A2, ...
-Although they are attached in the same order as 1, 2, ..., As will be described later, they always change depending on whether or not each countermeasure can improve the molding failure.

In the "calculation of operation condition improvement" of FIG. 2, if there is a molding defect for each molding defect type (FIG. 3).
When the “defective degree” is large, medium, or small), the countermeasures are applied one by one in accordance with the priority order using the above-mentioned “set of countermeasures”. At that time, in each defect type, if there is an improvement situation by the previous countermeasures, that is, “improvement”, the previous countermeasures are continued as it is, and if none, that is, “immutable” or “deteriorated”, Adopt priority measures. In this way, "a set of countermeasures"
It is possible to adopt the respective countermeasures prepared as above in order of priority. Further, since the countermeasure means defines the change amount of each operating condition variable as described above, the correction value of each operating condition variable is calculated by fitting the countermeasure means, and the setting condition of the molding machine 1 can be changed. If the previous countermeasure is continued, the modified value of the operating condition variable is changed from the previous value by the amount changed by the countermeasure.

In the above "calculation of improvement of operating conditions", when a plurality of types of defective molding are defective, the countermeasures for each defective type may be changed to the same operating condition variable. Weighted calculation at that time The method is shown in FIG. In the figure, first, <degree of failure> large, medium, and small are converted into weights 3, 2, and 1, respectively, and then the condition variable values by the countermeasures for each failure are weighted to calculate the average value. , The weighted average value is adopted as the actual correction value.

Further, in the above "calculation of improvement of operating conditions",
As for the countermeasures for which the evaluation of <improvement status> is “improvement”, the priority is replaced by one higher priority as shown in FIG. 7.
By repeating such a priority exchange,
As a learning effect, the countermeasures that have actually been improved can be gathered in the higher order of priority, and the defective molding can be solved with a smaller number of molding trials.

Further, another set is shown in FIG. 8 in addition to the "countermeasure set" shown in FIG. Comparing FIG. 5 and FIG. 8, the defect type A
Regarding both, the countermeasure measures of both are the same, but the priority order is different,
The defect types B and C are also different from the countermeasures and the priorities. In this way, a plurality of "countermeasure means sets" are prepared for various molded product types, learning is performed by molding trials, and the "countermeasure set" suitable for the molded product type is used. Molding defects can be resolved more quickly and accurately. The term "by type of molded product" as used herein means a distinction by a molded product shape such as a plate or a box, or a product such as a TV frame or a car handle.

As described above, in the present embodiment, in the case of improving the molding defect, the molding operator generally inputs the molding quality evaluation on the simple batch input screen, and the countermeasure means corresponding to each molding defect type is automatically provided. Are applied in the order of priority, the modified value of the operating condition variable as a countermeasure is calculated, and the condition is changed. Then, by repeating the cycle from one-shot molding trial, evaluation input of molding quality, and automatic correction of operating conditions, molding defects can be improved in a short time to a satisfactory level.

In addition, the priority order of the plurality of countermeasures prepared for each type of molding defect has a learning effect that the countermeasures that have improved defects due to molding trials are ranked higher, and are effective as the system is used. It becomes possible to apply appropriate countermeasures at an early stage.

When the countermeasures for a plurality of types of defective molding overlap with the change of the same operating condition variable, the degree of defectiveness of each defective type is converted into a weight, and the correction value of each defective type is weighted. By adopting the average value, the modified values of the relevant operating condition variables can be combined into one and the condition can be changed.

Furthermore, a set of countermeasures for defective molding is prepared for each type of molded product, and the priority order of the countermeasures is learned by a molding trial for each molded product type. Adjusted to the set of.

[0028]

As described above in detail, according to the present invention, in response to a defective injection molding, a general molding operator simply inputs the status of the defective molding by a simple operation to change the operating condition as a countermeasure against the defectiveness. Is automatically executed, so that defective molding can be improved even without a skilled molding operator.

Further, by incorporating learning by molding trials into the countermeasures for molding defects, effective countermeasures can be applied at an early stage, so that molding defects can be promptly improved.

Similarly, by preparing a set of countermeasures for each type of molded product and incorporating learning by molding trials, it is possible to correct defective molding accurately and promptly according to each type of molded product.

Further, even if a plurality of molding failure countermeasure measures overlap the same operating condition variable, one correction value can be changed with a weighted average value of the degree of failures, so that a plurality of molding failure countermeasures can be implemented collectively. it can.

[Brief description of drawings]

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

FIG. 2 is a processing flow chart of the embodiment.

FIG. 3 is an explanatory view of the operation of the embodiment.

FIG. 4 is an explanatory view of the operation of the embodiment.

FIG. 5 is an explanatory view of the operation of the embodiment.

FIG. 6 is an explanatory view of the operation of the embodiment.

FIG. 7 is an explanatory view of the operation of the embodiment.

FIG. 8 is an explanatory view of the operation of the embodiment.

FIG. 9 is a molding system diagram of a conventional example.

FIG. 10 is a processing flowchart of the conventional example.

[Explanation of symbols]

 1 Injection molding machine 2 Control device 3 Setting panel 4 Molding defect improving device 5 Display screen 6 Keyboard

Claims (4)

[Claims] 1. An injection molding apparatus having a control panel connected to an injection molding machine and controlling a plurality of setting variables of the injection molding machine by signals from the setting panel, wherein a display screen connected to the control apparatus and When the user has a keyboard and inputs from the same keyboard, a control signal is sent to the control device based on a plurality of types of molding defects that have been preset, the defect degree and the presence or absence of defect improvement, and the adjustment conditions and order of the setting variables. An injection molding apparatus comprising a defect improving device. 2. The injection molding apparatus according to claim 1, wherein in the next operation, when there is no defect improvement and the input is ranked lower than the previous time, a preset setting input is adjusted for a setting variable corresponding to the input. An injection molding apparatus characterized in that the adjustment condition of the setting variable is set as a condition and rank, and when the adjusting condition of the setting variable spans a plurality of times, the setting condition is set as a weighted average by the rank. 3. The injection molding apparatus according to claim 2, wherein in the case of previously inputting adjustment conditions for setting variables and ranks, the same molding is performed when a molding defect type having a defect improvement is input at the next operation. An injection molding apparatus, characterized in that the adjustment condition of the setting variable of the defect type and the setting of the rank are raised. 4. The injection molding apparatus according to claim 1, wherein a plurality of types of molding defects, defect degrees and presence / absence of defect improvement, and adjustment conditions and order of setting variables are provided, and one set is selected and preset input is performed. An injection molding device characterized by: