JP2001322150A - Method for controlling injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control temperature always stably by selecting whether reading or writing is to be done or not with regard to temperature data in molding conditions when the molding conditions are read or written between the controller and memory of an injection molding machine. SOLUTION: In the injection molding machine in which a specified molding condition C1 is set, when another molding condition C2 is read from an external or internal memory, and the molding condition is read or written, a step for selecting temperature data t2 in the molding condition C2 are to be read or not is formed. When the reading is possible, all the data a2 in the molding condition C2 including the temperature data t2 are read. When the reading is impossible, data b2 excluding the temperature data in the molding condition C2 are read, and with regard to the temperature data, temperature data t1 in the molding condition C1 are applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an injection molding machine, and more particularly to a method for reading or writing the molding conditions.

[0002]

2. Description of the Related Art In molding an injection molded article, molding is performed according to molding conditions set in a control device of an injection molding machine. The molding conditions include the mold structure such as the shape and size of the molded product cavity, the type of resin used, the ambient temperature,
It is corrected every time the mold is replaced so that the optimum value is obtained according to the characteristics required for the molded product. Further, when starting up a new molding operation associated with a mold change or the like, molding is performed while changing molding conditions stepwise.

Normally, a plurality of patterned molding condition data are stored in an external or internal memory of the control device. In the case of changing a mold, the molding condition data is read out to the control device as necessary, and molding control is performed. Will be For example, in an injection molding machine in which specific molding conditions are set, other molding conditions are read from a memory in order to correct the molding conditions or confirm the contents. However, in this case, the following problem occurs.

That is, of the other molding conditions read from the memory, data relating to pressure, speed, timer, and the like are operated and controlled after a command is output.
The control of the temperature data is started from the moment it is read. Therefore, when the temperature of the resin material in the heating cylinder is controlled to 250 ° C. in the present process, if other molding conditions having the temperature data of 350 ° C. are read out, 3 moldings are immediately performed.
It changes to 50 ° C temperature control. In this case, depending on the resin, not only burning may occur in the heating cylinder, but also stable temperature control may not be performed, resulting in molding trouble.

Therefore, in the above case, it is preferable that the temperature data can be kept as it is in the current process. Further, as described above, when data other than the temperature data is corrected, when these data are written to the memory, it is preferable that the temperature data can be prevented from being written among the molding conditions in the memory.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to read or write molding conditions between a control device of an injection molding machine and a memory. As for the temperature data, whether to perform reading or writing can be selected, so that stable temperature control is always performed.

[0007]

Means for Solving the Problems That is, this claim 1
According to the invention, when reading out another molding condition C2 from an external or internal memory in an injection molding machine in which a specific molding condition C1 is set, whether or not to read out temperature data t2 in the other molding condition C2 Is selected, and when reading is possible, all data a2 of the other molding conditions C2 including the temperature data t2 is read. When reading is impossible, data other than the temperature data in the other molding conditions C2 is read out. The present invention relates to a control method for an injection molding machine, wherein b2 is read out and temperature data is set as temperature data t1 of the specific molding condition C1.

Further, the invention of claim 2 is characterized in that, in the injection molding machine in which the specific molding condition C3 is set, when the other molding condition C4 of the external or internal memory is written, the specific molding condition C3 A step of selecting whether or not to write the temperature data t3 is provided; if writing is possible, all the data a3 of the specific molding condition C3 including the temperature data t3 is written; if writing is not possible, the specific molding condition C3 is written Is written with data b3 other than the temperature data, and the other molding conditions C
4 relates to a control method for an injection molding machine, wherein the temperature data is t4.

A third aspect of the present invention relates to a control method of an injection molding machine according to the first or second aspect, wherein reading or writing of the molding conditions is performed to start a new molding operation.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing an example of the control method according to the first aspect of the invention, FIG. 2 is a block diagram showing one example of the control method according to the second aspect of the invention, and FIG. 3 is a conceptual diagram of a control device of the injection molding machine. FIG. 4 is a continuous control diagram showing an example of stepwise control during start-up molding.

As shown in FIG. 3, the injection molding machine 10 is provided with a control device 20 for controlling the same.
An external or internal memory 30 is attached to the control device 20,
The memory 30 stores a plurality of patterned molding condition data P1, P2, P3, and Pn. If necessary, the read arbitrary data is overwritten in the molding condition memory of the control device 20, and The data of the molding condition memory is written to the external or internal memory 30. The injection molding machine 10 is controlled and operated based on the molding condition memory. Reference numeral 21 denotes a keyboard, and 22 denotes a display.

The invention of claim 1 will be described with reference to FIG. 1. The invention of claim 1 is based on an external or internal memory 30 of an injection molding machine 10 (control device 20) in which specific molding conditions C1 are set. This is a case where another molding condition C2 is read out and the molding condition is corrected. The specific molding condition C1 is the molding condition of the current process stored in the molding condition memory of the control device 20, and the other molding condition C2 is the molding condition of another process stored in the external or internal memory 30. The symbols a1 and a2 indicate (all) data,
t1 and t2 are temperature data therein, and b1 and b2 mean data other than the temperature data.

In this case, there is provided a step of selecting whether or not to read out the temperature data t2 in another molding condition C2. When "Readable" is selected, all the data a2 of the other molding condition C2 including the temperature data t2 is read. As a result, as shown in the lower left of the figure,
The data of the modified molding condition Y1 is modified to all data a2 of the other molding condition C2.

On the other hand, when "readout disabled" is selected, data b2 other than the temperature data in the other molding conditions C2 is read out, and the temperature data is set to the temperature data t1 of the specific molding condition C1. You. as a result,
As shown in the lower right of the figure, the data d1 of the modified molding condition N1 is the same as the specific molding condition C1 for the temperature data.
In the data t1, the data other than the temperature data is corrected to the data b2 of the other molding condition C2.

In the case where reading is not possible, instability of molding due to the difference in temperature data as described above can be avoided. Of course, if the temperature data does not affect the molding operation, it is sufficient to select “readable”.

Next, the second aspect of the present invention will be described with reference to FIG. The invention according to claim 2 is a case in which (in the control device 20 of) the injection molding machine 10 in which the specific molding condition C3 is set, the other molding condition C4 of the external or internal memory 30 is written and the molding condition is corrected. It is. Here, the specific molding condition C3 is the molding condition of the current process stored in the molding condition memory of the control device 20, and the other molding condition C4 is the molding condition stored in the external or internal memory 30. Symbols a3 and a4 indicate (all) data, and t3 and a4
t4 is the temperature data among them, and b3 and b4 mean data other than the temperature data.

At this time, a step of selecting whether or not to write the temperature data t3 within the specific molding condition C3 is provided in the same manner as described above. If "writable",
Data a3 of all the specific molding conditions C3 including the temperature data t3 is written. As a result, as shown in the lower left of FIG. 2, the data of the modified molding condition Y2 is modified to all data a3 of the specific molding condition C3.

On the other hand, when "write-disabled" is selected, data b3 other than the temperature data in the specific molding condition C3 is written, and the temperature data is set to the temperature data t4 of the other molding condition C4. You. as a result,
As shown in the lower right of FIG. 2, the data d2 of the modified molding condition N2 is the same as the other molding condition C4 for the temperature data.
In the data t4, the data other than the temperature data is corrected to the data b3 of the specific molding condition C3.

FIG. 4 is a diagram showing an injection according to claim 1 or 2, wherein the reading or writing of the molding conditions is performed to start a new molding operation. The present invention relates to a control method for a molding machine. In this start-up example, the molding conditions are changed step by step, step 2, and step 3. For the sake of simplicity, here the temperature data,
Only the cooling time data and the mold clamping pressure data will be described.

First, the case of reading will be described. The data stored in the memory 30 is, as shown by the thin line, the temperature of 350 ° C. and the cooling time of 2 sec. , And a mold clamping pressure of 8 MPa. This is determined by selecting “readout disabled” of the temperature data and, as indicated by the bold line in FIG. The mold clamping pressure was corrected to 7 MPa.
5 sec. The mold clamping pressure is corrected to 7.5 MPa, and the target value is set in step 3. Since the temperature data is not read out, it remains at 250 ° C. (here) which is the temperature data at which the molding machine is currently operated.

In order to write the above steps 1, 2 and 3 into the memory 30 to form the start-up molding data, if the temperature data is set to "writable", the temperature is the temperature data in the original memory. At 350 ° C., the control data indicated by the thick line in the figure is stored in the memory. In the case of “writable”, the temperature data of the operating temperature of 250 ° C. and the control data indicated by the thick line in the figure are written in the memory.

[0022]

As described above, in the method for controlling an injection molding machine according to the present invention, when the molding conditions are read or written between the control device of the injection molding machine and the memory, the molding conditions are read. Since the temperature data in the above can be selected whether to perform reading or writing, stable temperature control can always be performed.

In particular, in the method of the present invention, it is possible to easily and inexpensively cope with a control device in which molding conditions cannot be set in advance.
Its practical value is great.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a control method according to the present invention.

FIG. 2 is a block diagram showing an example of a control method according to the invention of claim 2;

FIG. 3 is a conceptual diagram of a control device of the injection molding machine.

FIG. 4 is a continuous control diagram illustrating an example of stepwise control during start-up molding.

[Explanation of symbols]

 Reference Signs List 10 injection molding machine 20 control device 30 memory

Claims (3)

[Claims] When reading out another molding condition (C2) from an external or internal memory in an injection molding machine in which a specific molding condition (C1) is set, the temperature in the other molding condition (C2) is read. A step of selecting whether or not to read the data (t2) is provided; if the data can be read, all the data (a2) of the other molding conditions (C2) including the temperature data (t2) are read; Read out the data (b2) other than the temperature data in the other molding conditions (C2) and use the temperature data as the temperature data (t1) of the specific molding condition (C1). Machine control method. 2. In an injection molding machine in which a specific molding condition (C3) is set, when writing another molding condition (C4) in an external or internal memory, a temperature within the specific molding condition (C3) is written. A step of selecting whether to write data (t3) or not; if writing is possible, writing all data (a3) of the specific molding condition (C3) including the temperature data (t3); Injection molding, wherein data (b3) other than the temperature data in the specific molding condition (C3) is written, and the temperature data is temperature data (t4) of the other molding condition (C4). Machine control method. 3. The control method for an injection molding machine according to claim 1, wherein reading or writing of the molding conditions is performed to start a new molding operation.