JPH06725U - Molding condition setting device for injection molding machine - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably set the molding conditions in the injection molding machine where the mold is replaced. [Structure] A mark 7 indicating the identification code of the mold 5 is arranged on the mold 5. On the other hand, the injection molding machine main body is provided with a sensor for detecting the mark 7 on the mold 5 set at a predetermined position. Therefore, when the mold 5 is set at a predetermined position, the identification code on the mold is detected by the sensor, and the molding condition corresponding to the detected identification code is automatically set.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an injection molding machine that produces a plastic molded product according to the type of mold, and more particularly to a molding condition setting device that can automatically set molding conditions according to the type of mold.

[0002]

[Prior art]

 In the injection molding machine, it is necessary to prepare a mold according to the type of plastic molded product to be produced, and there are several tens of types. Moreover, in the injection molding machine, it is necessary to change various molding conditions such as mold clamping force, injection conditions and cooling conditions according to the type of mold.

When a mold is replaced in the injection molding machine, the operator confirms the number indicating the type of the mold and resets the molding condition corresponding to the confirmed number. The correspondence between the die number and the molding conditions is stored in advance in the memory, and the molding conditions are automatically set when the operator inputs the numbers.

[0004]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional technique, the confirmation of the die number is a human judgment, and therefore there is a possibility of misidentification. Moreover, this is especially true for a molding machine that selects and replaces one of several tens of molds. Therefore, a molding condition that does not match the mold is erroneously set, which may lead to a serious accident in which erroneous molding is performed. The present invention has been made in view of these circumstances, and its purpose is to reliably prevent erroneous setting of molding conditions and improve the reliability of a molding machine in which many types of molds are frequently replaced. I am trying.

[0005]

Therefore, in this invention, a molding die is set at a predetermined position of an injection molding machine main body, and molding conditions are changed according to the type of the set mold. In an injection molding machine that performs molding based on molding conditions, a mark indicating the identification code of the mold is arranged on the mold, and a sensor for detecting the mark on the mold set at the predetermined position is used for the injection. The molding machine is arranged in the main body to set molding conditions corresponding to the identification code detected by the sensor.

[0006]

[Action]

 According to this structure, the mark indicating the identification code of the mold is arranged on the mold. On the other hand, the injection molding machine main body is provided with a sensor for detecting a mark on the mold set at a predetermined position. Therefore, when the mold is set at the predetermined position, the identification code on the mold is detected by the sensor, and the molding condition corresponding to the detected identification code is automatically set.

[0007]

【Example】

 An embodiment of a molding condition setting device of an injection molding machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining how the mold is replaced in the injection molding machine of the embodiment.

As shown in the figure, a clamper 2 is provided in the main body 1 of the injection molding machine, and the mold 5 is clamped by the clamper 2 to perform injection molding. In the mold 5, a molding material having a predetermined shape can be obtained by injecting a molding plastic material into the mold. The injection molding control itself is not directly related to the gist of the present invention, and a detailed description thereof will be omitted.

As the mold 5, various types are prepared according to the type of molded product. On the other hand, as an injection molding machine, it is necessary to change various molding conditions such as mold clamping force, injection conditions and cooling conditions depending on the type of molded product to be produced, that is, depending on the type of mold 5. Yes, drive control is performed by a controller (not shown) so that injection molding is performed under changed molding conditions. Molding conditions are stored in advance in the memory of this controller in correspondence with the numbers indicating the mold types (hereinafter referred to as "mold numbers"), and the corresponding molding conditions are specified by designating the mold numbers. It is read and the molding conditions are changed. The designation of such die number is automatically performed as described later.

The die number may be designated manually. In this case, the die number is designated by operating the touch switch of the operation panel 3 to input the number. Further, by operating the touch switch of the operation panel 3, the contents of the molding conditions are preset and changed. The operation panel 3 has a display screen such as a CRT, and error information described later is displayed on this display screen.

Now, the replacement of the mold 7 that has been put in in advance is executed by the following procedure.

That is, the mold 7 that has finished the processing of the molded product is carried out from the injection molding machine body 1 as shown by an arrow C. On the other hand, the die 5 to be processed next is placed on the carrier 4. Then, the carriage 4 moves to the carry-in position as shown by arrow A. Then, the die 5 on the table 4 is conveyed to a predetermined position in the injection molding machine main body 1 via a roller arranged on the table 4 as shown by an arrow B. Then, if it is set at a predetermined position, it is clamped by the clamper 2 and injection molding is performed, and if the processing for the predetermined number of shots is finished, the clamper 2 is unclamped and the mold 5 is again in the direction of arrow D. Be delivered to.

The series of operations described above may be performed manually or automatically by an automatic die changer.

When the mold 5 is replaced, the mold number of the mold 5 is identified by the CPU of the controller in the procedure shown in FIG. In order to perform this identification processing, the mold 5 is provided with a pin 7 as shown in FIG. 2, and the injection molding machine body 1 is provided with a sensor 9 for detecting the presence or absence of the pin 7.

When the mold 5 is automatically replaced by the automatic mold changing device, the automatic mold changing device (this is used before the mold 5 is loaded into the injection molding machine body 1). Since it is clamped by a part of the injection molding machine), the presence or absence of the pin 7 may be detected by the sensor 9 at this time to identify the mold number. In any case, it is possible to identify the mold number when the mold 5 is set at a predetermined position of the injection molding machine except the mold 5.

As shown in FIG. 2, the mold 5 has a holding plate 6 on both sides, and pins 7 are intermittently arranged in a row on one side surface of one holding plate 6. That is, a plurality of positions (1) to (6) are preset from the top on the side surface of the holding plate 6, and predetermined positions (1) and (2) of the preset plurality of positions (1) to (6) are set. , (5), (6) (indicated by diagonal lines) are provided with pins 7. In this case, the arrangement of the presence / absence of the pin 7 in (1) to (4) of the preset plural positions (1) to (6) specifies the mold number. Table 1 below shows the relationship between the arrangement position of the pin 7 and the die number of the die 5.

[0018] As shown in Table 1, the arrangement positions (1) to (4) are the data for identifying the mold number, and for (1) to (4), "1", "0", "0", If it is a logic array of "0", "0"("1" means "with pin", "0" means "without pin" (the same applies below)), this is the mold number "NO.1". Means Similarly, the respective molds of "NO. 2", "NO. 3" ... "NO. 9" ... according to the arrangement of the logic "1" and "0" of the mold identification data (1) to (4). The number 5 is identified.

The data “1” and “0” at the arrangement position (5) are data for the well-known parity check, and the number of logic “1” s at the arrangement positions (1) to (5) is always The pins 7 are arranged so as to be an odd number, that is, the number of pins 7 in (1) to (5) is an odd number. Therefore, the sensor 9 described later determines whether or not the number of the pins 7 is an odd number, so that the erroneous detection at the time of reading the die number is checked.

Further, the data at the arrangement position (6) is data for determining the presence or absence of the mold 5, and is always logic “1”, that is, the pin 7 is always arranged at the position (6). By detecting this with a sensor 9 described later, it is determined that the mold 5 has been carried into the main body 1 of the injection molding machine and set in a predetermined position.

As is clear from Table 1 above, the mold 5 shown in FIG. 2 is found to be the “NO. 3” mold 5 from the arrangement of the pins 7. For other types of molds 5, the pins 7 are arranged in accordance with Table 1, and the mold numbers “NO. 1” ... Are specified. The pin 7 may be fixed to the holding plate 6 by bolting, may be fixed by adhesion, or may be cast integrally with the holding plate 6, and the fixing method thereof is arbitrary.

FIG. 3 shows a state in which the mold 5 of FIG. 2 is loaded into the main body 1 of the injection molding machine and set at a predetermined position in a cross-section with respect to the surface on which the pins 7 are arranged. As shown in the figure, on a predetermined bracket 8 inside the main body 1, six proximity switches 9 are arranged in a row at positions corresponding to the positions (1) to (6) of the holding plate 6. Each proximity switch 9 operates when the pin 7 exists in the detection direction (horizontal direction), and outputs a detection signal of logic "1" indicating "there is a pin". Further, the proximity switch 9 does not operate when the pin 7 does not exist in the detection direction, and outputs a detection signal of logic "0" indicating "no pin". Note that the pin 7 may not be provided so as to project at each position, but a recess may be formed at each position. In this case, the proximity switch 9 can also perform similar detection. Also, a sensor using light as a detection medium can be used to detect such irregularities. Further, it is naturally possible to use not a non-contact sensor but a sensor that detects unevenness by contact.

The detection signals of the proximity switches 9 ... Corresponding to the positions (1) to (6) are S1 to S6, and in the case of the mold 5 shown in FIG. 2, only the detection signals S1, S2, S5 and S6 are generated. It becomes "1", and the other detection signals S3 and S4 become "0". The contents of these detection signals S1 to S6 are added to the controller, and the CPU applies the table 1 to identify the die number, check the parity, and determine the presence or absence of the die.

Hereinafter, such processing will be described with reference to the flowchart shown in FIG.

First, when the mold 5 is set at a predetermined position, the process shown in the figure starts. Then, the presence or absence of the mold 5 is first determined based on the content of the detection signal S6 (step 101). That is, assuming that the content of S6 is logical '0', the pin 5 is always arranged at the position (6) in the mold 5, so that the mold 5 is physically set at the predetermined position. If the mold 5 is not set correctly or it has not been loaded due to some mistake, it is determined that an “error has occurred”. This content is displayed on the display screen of the operation panel 3 for a warning, and the operator is alerted (step 108). Then, since an error occurs and it is necessary to take necessary measures such as inspection, the mold changing operation in the automatic mold changing device is stopped (step 109).

On the other hand, if the content of the detection signal S6 is logic '1', it is determined that the mold 5 is correctly mounted, and then the mold 5 is set based on the content of the detection signals S1 to S4. The die number of the die 5 is detected. That is, for example, if the detection signals S1 to S4, that is, the logical structures of the positions (1) to (4) are "1", "1", "0", and "0", the mold number is "1" from Table 1. No. 3 "(step 102). However, since there is a possibility of erroneous detection, it is next determined whether or not the number of bits of logic '1' in the detection signals S1 to S4 is an odd number in order to check the erroneous detection by the parity check (step 103). .

Here, if the total number of bits of the logic '1' of the detection signals S1 to S4 corresponding to the positions (1) to (4) is odd (YES in step 103), the positions (1) to Since the total number of bits of logic "1" of the detection signals S1 to S5 corresponding to (5) must be an odd number, the content of the detection signal S5 must be logic "0" (step 104). Therefore, if the content of the detection signal S5 is logic "1", it means that the detection error has occurred (NO in step 104), an error is displayed, and the die replacement operation is stopped (steps 108, 109).

Similarly, if the total number of bits of the logic '1' of the detection signals S1 to S4 corresponding to the positions (1) to (4) is an even number (NO at step 103), the positions (1) to (5). ), The total number of bits of the logic "1" of the detection signals S1 to S5 must be an odd number, so the content of the detection signal S5 must be the logic "1" (step 107). Therefore, if the content of the detection signal S5 is logic '0', it means that an erroneous detection has been made (NO at step 107), an error occurrence is displayed, and the die replacement operation is stopped (steps 108, 109). .

On the other hand, as a result of the parity check in steps 104 and 107, if the content of the detection signal S5 is logic “0” or “1”, it means that the detection is correct (YES in steps 104 and 107). ), The mold number detected in step 102 is correct, and the molding conditions corresponding to this mold number are read from the memory (step 105). Then, the replacement operation of the mold 5 is continued thereafter, and the injection conditions are changed to the molding conditions read from the memory (step 106).

In the embodiment, the parity check is executed by setting the number of bits of “1” to be always an odd number, but it may be set to always be an even number. It is also possible to omit the parity check. Further, the determination of the presence / absence of the mold itself may be omitted.

[0031]

[Effect of device]

 As described above, according to the present invention, even in an injection molding machine in which many types of molds are exchanged complicatedly, erroneous setting of molding conditions can be reliably prevented, and the reliability of the apparatus can be dramatically improved. Will be able to improve.

[Brief description of drawings]

FIG. 1 is a perspective view used to explain how a mold is replaced in an embodiment of a molding condition setting device for an injection molding machine according to the present invention.

FIG. 2 is a front view showing a mold used in Examples.

FIG. 3 is a cross-sectional view of the mold shown in FIG. 2 when set in an injection molding machine.

FIG. 4 is a flowchart illustrating a molding condition setting process in the embodiment.

[Explanation of symbols]

 1 Injection molding machine main body 5 Mold 6 Holding board 7 Pin 9 Proximity switch

Claims (4)

[Scope of utility model registration request] 1. An injection molding machine in which a molding die is set at a predetermined position of an injection molding machine body, molding conditions are changed according to the type of the set mold, and molding is performed based on the molding conditions. In the above, a mark indicating the identification code of the mold is arranged on the mold, and a sensor for detecting the mark on the mold set at the predetermined position is arranged on the main body of the injection molding machine. A molding condition setting device for an injection molding machine, which sets a molding condition corresponding to an identification code detected by. 2. The mark is a concave portion or a convex portion formed at a predetermined position among the preset plural positions on the mold, and the sensor is a concave portion at the preset plural positions on the mold. Or a sensor that detects the presence or absence of convex parts,
2. The molding condition setting device for an injection molding machine according to claim 1, wherein a molding condition is set by using an array of presence or absence of concave portions or convex portions at the preset plural positions detected by the sensor as an identification code of the mold. 3. The recesses or protrusions are formed so that the number of recesses or protrusions at preset plural positions on the mold is always odd or even, and the number of recesses or protrusions is determined by the sensor. 3. The molding condition setting device for an injection molding machine according to claim 2, wherein erroneous detection of the identification code is checked by determining whether it is an odd number or an even number. 4. A mold is injection-molded by further forming a concave portion or a convex portion at a predetermined position other than the preset plural positions on the mold and detecting the concave portion or the convex portion at the predetermined position by the sensor. A molding condition setting device for an injection molding machine, which determines whether it has been set in the machine body.