JP3487670B2 - Method of setting cylinder temperature and nozzle temperature of injection molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for setting a cylinder temperature and a nozzle temperature of an injection molding machine.

[0002]

2. Description of the Related Art In a cylinder of an injection molding machine, a plurality of heat sources such as band heaters are arranged along the axial direction of the cylinder, and a plurality of temperature sensors for detecting the temperature of each part of the cylinder are arranged. ing. At the stage of setting molding conditions for a new mold, the temperature of each part of the cylinder when a good product is molded is detected, and the optimum value of the temperature distribution of the cylinder for the mold is determined. The optimum value of the cylinder temperature distribution is almost uniquely determined according to the combination of the mold and the resin used, and the other molding conditions set at that time. When performing a molding operation using, it is desirable to faithfully reproduce the temperature distribution of the cylinder obtained by setting the conditions.

Therefore, it is necessary to memorize the optimum cylinder temperature distribution obtained by the condition setting work by some method, and the method of entering the temperature of each cylinder part together with other molding conditions in the molding condition table, and the injection molding machine. A method is known in which the temperature of each part of the cylinder is stored together with other molding conditions in a mold file provided in the control device.

The injection molding machine is provided with several to five to six sets of heat sources. In the conventional molding condition table and the record column of the mold file, each band heater as a heat source is a "nozzle part" or "nozzle". Roughly categorized as "cylinder front", "cylinder rear", etc., only the set temperatures for each were recorded, and no data was left regarding the exact location of each heat source.

Therefore, there is no problem as long as the injection molding machine has exactly the same number of heat sources and the same arrangement position, but when performing the molding work with another injection molding machine having a different number of heat sources and / or arrangement positions. However, even if the temperature is set with reference to the molding condition table and the mold file, it is difficult to reproduce the cylinder temperature distribution obtained by the condition setting as it is.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to perform a molding operation on an injection molding machine in which the number of heat sources arranged in the cylinder and the nozzle portion and the arrangement position thereof are different from the injection molding machine used in the condition setting. A method for setting a cylinder temperature and a nozzle temperature of an injection molding machine that can faithfully reproduce the temperature distributions of the cylinder and the nozzle portion obtained by setting the conditions even when performing the molding operation. .

[0007]

A method for setting a cylinder temperature (nozzle temperature) of an injection molding machine according to the present invention is to set the temperature of each part of the injection cylinder (nozzle) when a good product is molded by the first injection molding machine. The step of detecting by the detecting means, the step of obtaining the waveform representing the temperature distribution in the axial direction of the injection cylinder (nozzle) based on the detected temperature of each part of the cylinder (nozzle), and the obtained waveform The step of storing and storing in the second injection molding machine differs from the first injection molding machine in the second injection molding machine in which the number and / or the position of the heat sources arranged in the injection cylinder (nozzle) are different. (Nozzle) The step of obtaining the temperature control target value of each part based on the stored waveform.

[0008]

The temperature distribution of the cylinder (nozzle) during the molding of a good product is stored in advance as a waveform corresponding to the axial position of the cylinder (nozzle). When performing a molding operation with a second injection molding machine having cylinders (nozzles) having different numbers or locations of heat sources, the cylinder (nozzle) temperature corresponding to the position of each heat source section in the cylinder of the injection molding machine is set. The temperature distribution of the cylinder (nozzle) at the time of molding a good product is reproduced by obtaining it from the waveform and setting it as the temperature control target value of each heat source part.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of an electric injection molding machine according to an embodiment, and a hopper 1 stores a resin to be supplied in an injection cylinder 4. The injection cylinder 4 has a nozzle portion 40 at its tip. The screw 2 is a servo motor M for injection.
It is moved in the axial direction of the injection cylinder 4 by s, and is also rotated for measurement by the screw rotation servomotor Mr via the power transmission mechanism 5 including a timing belt and a toothed pulley. A pressure detector 3 for detecting a resin reaction force acting in the axial direction of the screw 2 is provided at the base of the screw 2, and an injection holding pressure in the injection holding process and a screw back pressure in the measuring and kneading process are detected. It Further, the injection servomotor Ms is provided with a pulse coder Ps for detecting the position and moving speed of the screw 2, and the screw rotation servomotor Mr is provided with a pulse coder Pr for detecting the rotation speed of the screw 2. Has been deployed.

In the cylinder 4 including the nozzle portion 40, a plurality of band heaters H0 to Hn, each of which constitutes a heat source, and a set of thermocouples G0 to Gn as a temperature sensor for detecting a cylinder temperature near each heat source, are cylinders. 4 is provided from the nozzle portion 40 at the tip of No. 4 to the base portion of the cylinder 4.
As shown in FIG. 7, the nozzle portion 40 has a plurality of band heaters H.
01 to H0r and a plurality of thermocouples G01 to G0r are provided. In order to avoid complication of the drawing in FIG. 1, the band heaters H01 to H0r are represented by H0, and the thermocouples G01 to G0r are represented by G0. Show.

The controller 10 of the injection molding machine includes a CNC CPU 16 which is a numerical control microprocessor, a PMC CPU 15 which is a programmable machine controller microprocessor, a servo CPU 17 which is a servo control microprocessor, and A. / D converter 3
4 has a monitor CPU 33 for performing a sampling process for detecting the injection holding pressure and the screw back pressure. Information is transmitted between the microprocessors via the bus 26 by selecting input / output between the microprocessors.

The PMC CPU 15 is connected to a ROM 19 which stores a sequence program for controlling the sequence operation of the injection molding machine and a RAM 21 which is used for temporary storage of operation data. The CNC CPU 16 has a ROM 20 storing programs for controlling each axis of the injection molding machine and an R used for temporary storage of operation data.
AM25 is connected. A non-volatile memory (RAM) 24 connected to the CNC CPU 16 is a molding data storage memory for storing molding conditions and various set values, parameters, macro variables, etc. relating to injection molding work, and is accessed from other CPUs. Is also possible.

Servo CPU 17 and monitor CPU 33
Each of the ROMs has a ROM 18 storing a control program dedicated to servo control and a RAM 2 used for temporary storage of data.
2. A ROM 29 storing a control program relating to sampling processing for obtaining pressure data and the like, and a RAM 30 used for temporary storage of data are connected. Further, the servo CPU 17 has servo amplifiers 11 to 11 that drive the servo motors of the respective axes based on a command from the CPU 17.
12 and the like are connected via a servo interface 14. Pulse coder P installed on each axis servo motor
Each of the outputs from s to Pr is the servo interface 1
4 is fed back to the servo CPU 17, and the current position of the screw 2 and the values of its moving speed and rotation speed calculated by the servo CPU 17 based on the feedback pulse of the pulse coder are stored in the current position storage register and current speed memory in the RAM 22. Stored in each of the registers. In FIG. 1, only the servo amplifier 11 for the screw rotation servo motor Mr and the servo amplifier 12 for the injection servo motor Ms are shown, and the other axes are omitted.

ON / OFF control of the band heaters H0 to Hn is performed via the input / output circuit 23 and the heater circuit 13. The temperatures T0 to Tn of the heat source parts of the respective parts of the cylinder 4 detected by the thermocouples G0 to Gn are input to the input / output circuit 23, and A / D converter provided in the input / output circuit 23
/ D converted. The monitor CPU 33 reads the A / D-converted temperature at every set cycle and updates and stores it in the RAM 30. Further, the monitoring CPU 33 causes the band heater H0 (H) so that the temperature of each heat source unit matches the temperature control target value of each heat source unit stored in the nonvolatile memory 24.
01 to H0r) and H1 to Hn are individually ON / OFF controlled. The number of band heaters (r + n) to be provided is not particularly limited, but at least in the case of an injection molding machine used for setting conditions for obtaining appropriate molding conditions, each part of the cylinder 4 including the nozzle part 40. Because the temperature of the is necessary to be finely adjusted, the number has never been large.

The communication interface 28 is an input / output interface for transmitting data with an auxiliary device 32 such as a disk controller or a printer. The manual data input device 31 with a display is a CRT display circuit 2
A numeric keypad for inputting numerical data, various function keys and the like are provided, which are connected to the bus 26 via 7. The operator can select a monitor display screen, a function menu, and input various data.

With the above configuration, the CNC CPU 16 distributes pulses to the servo motors of the respective axes based on the control program of the ROM 20 and various set values, and the servo CPU 17 commands the movement commands distributed to the respective axes of the pulses. Based on the position feedback signal and the velocity feedback signal detected by the detectors such as the pulse coders Ps and Pr, the servo control such as the position loop control, the velocity loop control and the current loop control is performed as in the conventional case. Executes digital servo processing.

For a new mold, a condition setting work is performed to determine molding conditions using a standard injection molding machine. The operator operates the manual data input device 31 with a display to call the temporary molding conditions stored in the non-volatile memory 24, and appropriately corrects the injection conditions, the metering conditions, the temperature conditions of each part of the cylinder 4, and the like. The operator performs trial injection molding a plurality of times as necessary, determines the quality of the molded product obtained by each injection molding, and obtains the optimum molding conditions under which the good product is stably molded. At this time, thermocouple G0 (G01
.About.G0r) to Gn, the temperatures T0 (T01 to T0r) to Tn of the respective parts of the cylinder 4 are read by the monitoring CPU 33 via the input / output circuit 23 and updated and stored in the RAM 30.

Since injection conditions, measuring conditions, temperature conditions, etc. are interrelated and have a delicate influence on the quality of products, such molding condition setting work is performed by a skilled operator.

Cylinder 4 obtained by the above condition setting work
The temperature distribution data creation process for storing the temperature distribution of each part will be described with reference to the flowchart of FIG.
In the temperature distribution data creation processing, after the above-mentioned condition setting work is completed, the operator selects the menu item of "temperature distribution data creation" with the manual data input device 31 with a display, and issues a start command to the PMC CPU 15
Executed by.

When the condition setting is completed, the PMC CPU 15 stores the values of the temperatures T1 to Tn of each part of the cylinder 4 stored in the RAM 30 and the tip of the cylinder 4 (nozzle part 40).
Deployment point h of thermocouples G0 (G01 to G0r) to Gn, which are registered in the nonvolatile memory 24 in advance, with the tip of each of them as an origin.
Array data (h01, T01), (h02, T02), ..., By reading the values 0 (h01 to h0r) to hn,
(H0r, T0r), (h1, T1), (h2, T
2), ..., (hn, Tn) are generated (step a
1), a function T = f of a spline curve connecting each array data
(H) is calculated (step a2). In the graph showing the temperature distribution in the axial direction of the injection cylinder shown in FIG.
Is a position on the cylinder 4 with respect to the tip of the cylinder 4 (tip of the nozzle portion 40), and T is temperature. Obtaining an approximate value T of the cylinder temperature at the position h by substituting the value of the distance h from the tip of the cylinder 4 into the function of T = f (h) even at the position where the thermocouple is not provided. You can

FIG. 1 shows each band heater H0 (H01 to H0r).
An example in which thermocouples G0 (G01 to G0r) to Gn are arranged near Hn to Hn is shown. As mentioned above, in the case of the standard injection molding machine used for setting the conditions, the number of band heaters has not been large, but depending on the skill of the operator, the cylinder temperature of several band heaters may be different. It is also possible to perform sufficient condition setting work by adjusting. In such a case, the function of the spline curve indicating the temperature distribution may be inaccurate if only the thermocouple for detecting the cylinder temperature is provided in a one-to-one relationship with the band heater. In addition to those used for control, thermocouples dedicated to temperature detection should be arranged on the cylinder 4 at appropriate intervals.

When the function of the spline curve indicating the temperature distribution is obtained, the PMC CPU 15 then manually inputs data with a display in which the horizontal axis is the distance from the cylinder tip (the tip of the nozzle portion 40) and the vertical axis is the temperature. A graph of the temperature distribution curve shown by the function of T = f (h) is displayed on the coordinate system of the display screen of the device 31 as shown in FIG. 3 (step a3), and the manual data input device 31 with display is modified. A standby state is waited for until one of the key, the registration key and the end key is operated (steps a4, a6 and a7).

At this time, when the operator determines that the temperature distribution curve needs to be corrected, the operator operates the correction key of the manual data input device 31 with a display (step a4), and then the axes of the coordinate system are changed. The array data is replaced or added by re-designating the curved path with the cursor by referring to the scale, and the PMC CPU 15 is caused to perform the same processing as steps a1 to a3, and the function of T = f (h) is obtained. The graph can be updated and displayed while being newly requested (step a
5). This correction work is effective for data calibration when the shape of the spline curve becomes inaccurate due to insufficient number of data due to detection of temperature distribution with a small number of thermocouples.

When a satisfactory temperature distribution curve is finally obtained, the operator operates the registration key (step a).
6) The function of T = f (h) is stored in the mold file of the non-volatile memory 24 corresponding to the mold for which the condition is set together with the resin name used and other molding conditions (step a).
8) The temperature distribution data creation process is ended.

When it is desired to check the temperature distribution state of each part of the cylinder 4 at that point in the middle of the above-mentioned condition setting, only the operation of displaying the temperature distribution curve is performed using the main part of the above-mentioned processing. It is also possible to make it. In that case, since it is not necessary to store the function, after the work of displaying and confirming the temperature distribution curve is completed, the end key is operated without performing the registration work to end the temperature distribution data creation processing (step a7).

The function of the temperature distribution curve registered in the mold file of the non-volatile memory 24 and other molding conditions can be obtained by selecting the mold file by designating the mold number from the manual data input device with display 31. , Can be downloaded to a storage medium such as a floppy disk via the communication interface 28, and can be printed on recording paper as a hard copy by a printer.

In the method of setting the temperature in the cylinder of another injection molding machine based on the hard copy printed by the printer, the structures of the injection molding machines are remarkably different from each other.
If it is difficult to transfer data using a storage medium such as a floppy disk, for example, after making the mold and setting the conditions in-house, outsource the molding work for mass production to a molding specialist in Japan or overseas. Useful in cases. Under such circumstances, there is no guarantee that the models of injection molding machines will be unified. Therefore, an operator who mass-produces products with such another injection molding machine receives a hard copy on which a graph of molding conditions and a temperature distribution curve for a mold used for molding work is printed, and the injection is performed by referring to the data. After setting the conditions, the measurement conditions, etc., further referring to the temperature distribution curve that is hard-copied, for example, the temperature distribution curve shown in FIG. 3, the band heater (thermocouple) of the injection molding machine for mass production is referred to. The temperature that becomes the temperature control target value is set for each. Regardless of the type of injection molding machine used for mass production, it is possible to measure the mounting position of the band heater (thermocouple) with the tip of the injection cylinder as the reference, and even the mounting position of the band heater (thermocouple). If you know
The set temperature of the band heater (thermocouple) corresponding to the position can be obtained with reference to the graph of FIG. 3 and set for each band heater (thermocouple). If the number of band heaters (thermocouples) and their mounting positions are different from the standard injection molding machine, the condition is the specific position on the cylinder, that is, the band heater (thermocouple) mounting position of the mass-production injection molding machine. Reproducing the same cylinder temperature as when setting is completed does not mean that the same temperature distribution as when setting conditions is completed is reproduced over the entire section of the cylinder, but the temperature distribution does not hinder molding. It is quite possible to reproduce

If the injection molding machine used for mass production and the injection molding machine used for condition setting have the same configuration and the data can be exchanged by a floppy disk or the like, a cylinder is provided on the side of the injection molding machine used for mass production. By pre-storing a program for the automatic temperature setting process, it is possible to automatically perform all the work relating to the setting of the cylinder temperature. FIG. 5 shows an example of the automatic cylinder temperature setting process. Here, it is assumed that the injection molding machine for mass production has the same configuration as that of the injection molding machine used for the condition setting at least in its control system, and the control device 10 of FIG. 1 is applied to the configuration of the control system. To do. The difference is the number of band heaters and the positions of band heaters.

Therefore, the operator who operates the mass-produced injection molding machine first receives the mold to be molded and the floppy disk in which the mold file corresponding to the mold number is downloaded, and the mold is received. After mounting the mold on the mass-production injection molding machine and setting the floppy disk on the disk controller, operate the manual data input device with display 31 of the mass-production injection molding machine to select the "Cylinder temperature automatic setting" menu item. To do.

Then, the PMC CPU 15 of the mass-production injection molding machine, which has started the process of automatically setting the cylinder temperature, first receives various molding conditions and a function f of the temperature distribution curve from the mold file of the floppy disk via the communication interface 28. (H) is read and stored in the nonvolatile memory 24 of the mass-production injection molding machine as the molding condition to be executed (step b1), and the value of the heater index i is initialized to zero (step b2).

Next, CP for PMC of mass-produced injection molding machine
U15 sequentially increments the value of the index i (step b3) until the value of the heater index i reaches the number (k + j) of heaters of the injection molding machine for mass production, and each time, the cylinder of the injection molding machine is increased. The positions hi 'of the band heaters arranged in the respective parts are sequentially read (step b4), and the value of hi' is substituted into the above-mentioned function f (h) to obtain the cylinder temperature value Ti 'corresponding to the position hi' (step b5), the value Ti 'is stored in the temperature setting file of the non-volatile memory 24 as the temperature control target value of each part of the cylinder (step b6). FIG. 6 is a conceptual diagram showing a temperature setting file provided in the non-volatile memory 24 of the mass-production injection molding machine. In this temperature setting file, the number (k + j) of heaters of the mass-production injection molding machine and i = The deployment positions hi 'of the band heaters 1 to (k + j) are stored in advance. When the number of heaters installed or the deployment positions thereof are changed for some reason, the manual data input device with display 31 is used each time. The number of heaters equipped (k +
j) and the value of each deployment position hi 'are updated. The mass-production injection molding machine is intended to simplify the handling, and generally, the number of heaters (k + j) is smaller than the number of heaters (r + n) of the injection molding machine for setting conditions.

The value of the heater index i is the number of heaters (k +
j) and it is confirmed that the setting of the temperature control target value of each cylinder position of i = 1 to (k + j) is completed (step b7), the PMC CPU 15 of the mass-production injection molding machine.
Ends the process related to the automatic setting of the cylinder temperature, and the operator waits for the temperature of the cylinder to rise, and the molding condition stored in the non-volatile memory 24 as the molding condition to be executed, that is, the floppy disk corresponds to the molding target mold. The automatic operation work of the injection molding machine is started in accordance with the molding conditions of the mold file read in.

As described above, in the case where the number of band heaters and the position of the band heaters are considerably different between the injection molding machine used for setting the conditions and the mass production injection molding machine, the mass production injection molding is performed. Since the same cylinder temperature as when the condition setting is completed is reproduced at the band heater mounting position of the machine, it does not mean that the same temperature distribution as when the condition setting is completed is reproduced over the entire section of the cylinder. Unless it affects the quality of the product, the automatic operation work should be started by directly using the first set temperature set by the manual setting operation or the automatic setting process as described above. As explained above, each element such as injection condition, measurement condition, temperature condition,
Since each of them affects each other in a complicated manner and affects the quality of the product, the conditions are set using a mass-production injection molding machine with a small number of band heaters, especially when the operator is unskilled. Even if I tried to reproduce the temperature distribution exactly the same as at the time of completion, it did not work, and as a result, it became necessary to correct the injection condition, measurement condition, etc. to match the tsuji, and the initial molding condition was changed by a slight correction operation. Because there is a risk of ruining.

As one embodiment, the example in which the temperature distribution of the cylinder at the time when the condition setting is completed is approximated by the spline curve has been described, but the adjacent array data may be connected by a straight line to be approximated. Also, instead of registering the band heater deployment position hi '(i = 1 to (k + j)) in advance in the controller of the mass-production injection molding machine, the band heater i to be controlled is selected each time. Alternatively, the processing of steps b5 and b6 may be performed by manually inputting the deployment position hi 'of the band heater.

Although a plurality of heat sources and temperature sensors are provided in the nozzle portion of the cylinder in the above embodiment, only one set of heat sources and temperature sensors may be provided. Further, without using the detection data of the temperature sensor provided in the nozzle portion, the temperature distribution of only the cylinder main body portion not including the nozzle portion can be obtained as a function of the position. Further, the temperature distribution of only the nozzle portion can be obtained as a function of position without using the detection data of the temperature sensor provided in the cylinder body.

Further, in addition to the temperature of each part of the cylinder including the nozzle part, the temperature distributions of the fixed side mold and the movable side mold may be detected in the same manner to obtain the function of the temperature distribution.

According to the method of setting the cylinder temperature of the injection molding machine of the present invention, the condition setting is performed even when the number of heat sources arranged in the cylinder and the positions of the heat sources are different from those of the injection molding machine used in the condition setting. The molding operation can be performed by faithfully reproducing the cylinder temperature obtained in step 1.

[0038]

According to the method of setting the temperature of the cylinder and / or the nozzle of the injection molding machine according to the present invention, the temperature distribution of the cylinder and / or the nozzle at the time of molding a good product is stored as a waveform corresponding to the axial position of the cylinder (nozzle). When performing molding work with another injection molding machine, obtain the cylinder and / or nozzle temperature of each heat source part in the cylinder and / or nozzle of that injection molding machine from the waveform during good product molding and control the temperature of each heat source part. Since it is set as the target value, even if the number of heat sources arranged in the cylinder and / or the nozzle and the arrangement position thereof are different from those of the injection molding machine used in the condition setting, the cylinder obtained in the condition setting and the Alternatively, the molding operation can be performed by faithfully reproducing the nozzle temperature.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of an electric injection molding machine of an embodiment to which a method of the present invention is applied.

FIG. 2 is a conceptual diagram showing an example of a spline curve showing a temperature distribution of a cylinder at the completion of condition setting.

FIG. 3 is a display example of a spline curve showing a temperature distribution of a cylinder.

FIG. 4 is a flowchart showing an outline of temperature distribution data creation processing.

FIG. 5 is a flowchart showing an outline of an automatic cylinder temperature setting process.

FIG. 6 is a conceptual diagram showing a temperature setting file provided in a mass-production injection molding machine.

FIG. 7 is an explanatory diagram showing a band heater and a thermocouple arranged in the nozzle portion.

[Explanation of symbols]

4 cylinders 13 heater circuit 15 PMC CPU 24 Non-volatile memory 28 Communication interface 31 Manual data input device with display 32 disk controller / printer H0 to Hn band heater G0 to Gn thermocouple

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Fujioka 3580 Kobaba, Oshinomura, Minamitsuru-gun, Yamanashi Prefecture FANUC CORPORATION (56) Reference JP-A-5-237892 (JP, A) JP-A-6 -79764 (JP, A) JP-A-6-262661 (JP, A) Actually open 3-52130 (JP, U) Actually open 63-154210 (JP, U) (58) Fields investigated (Int.Cl) . ^7, DB name) B29C 45/74 B29C 45/20 B29C 45/62 B29C 45/78

Claims (12)

(57) [Claims] 1. An injection cylinder for injecting a resin into a mold, and a plurality of heat sources arranged in an axial direction of the injection cylinder,
A method for setting a cylinder temperature of an injection molding machine, comprising: a plurality of temperature detection means for detecting the temperature of each part of an injection cylinder; and a temperature control device connected to the plurality of heat sources and the temperature detection means. ) The step of detecting the temperature of each part of the injection cylinder when the non-defective product is molded by the first injection molding machine by the temperature detecting means, and (b) the temperature of each part of the cylinder detected in step (a), A step of obtaining a waveform representing a temperature distribution in the axial direction of the injection cylinder; (c) a step of storing and storing the waveform obtained in the step (b) in a storage means; and (d) the first step. With respect to the second injection molding machine in which the number and / or the arrangement position of the heat sources arranged in the injection cylinder are different from those of the injection molding machine, the temperature control target values of the respective parts of the injection cylinder are maintained in the step (c). A method for setting a cylinder temperature of an injection molding machine, the method comprising: determining based on an existing waveform. 2. The cylinder temperature setting method for an injection molding machine according to claim 1, wherein the plurality of temperature detecting means are provided corresponding to the plurality of heat sources, respectively. 3. The injection cylinder is provided with a nozzle at its tip, and at least one of the plurality of temperature detecting means is provided.
The cylinder temperature setting method for an injection molding machine according to claim 1 or 2, wherein one is provided in the nozzle. 4. The step (b) is a graph showing the temperature distribution in the axial direction of the injection cylinder, and the detected values detected in the step (a) and the arrangement positions of the temperature detecting means. The cylinder temperature setting method for an injection molding machine according to claim 1, 2, or 3, further comprising a step of connecting a plurality of points indicating a correspondence relationship with a spline curve to determine the waveform. 5. The cylinder temperature setting method for an injection molding machine according to claim 1, wherein the step (c) includes a step of printing the waveform on a recording paper which can be read by an operator. . 6. The step (c) includes the step of storing and storing the waveform in a storage medium readable by a controller of the second injection molding machine.
The method for setting the cylinder temperature of an injection molding machine according to 2, 3, 4 or 5. 7. The cylinder temperature setting method for an injection molding machine according to claim 6, wherein said step (d) includes a step of automatically setting a temperature control target value for each part of said injection cylinder. 8. An injection cylinder having a nozzle at a tip end thereof for injecting resin into a mold, a plurality of heat sources arranged in the axial direction of the nozzle, and a plurality of units for detecting temperatures of respective parts of the nozzle. A method of setting the nozzle temperature of an injection molding machine having the temperature detection means of claim 1, and a temperature control device connected to the plurality of heat sources and the temperature detection means, wherein: (a) the first injection molding machine A step of detecting the temperature of each part of the nozzle when molded by a temperature detecting means; and (b) a temperature distribution in the axial direction of the nozzle based on the temperature of each part of the nozzle detected in step (a). The step of obtaining the waveform to be represented, (c) the step of storing the waveform obtained in step (b) in the storage means and storing it, and (d) the first injection molding machine are arranged in the nozzle. Number of heat sources and / or Relative installation position is different second injection molding machine, and a step of determining based on the temperature control target value of the nozzle each unit waveform stored the in step (c), a nozzle temperature setting method for an injection molding machine. 9. The step (b) is, on a graph showing a temperature distribution in the axial direction of the nozzle, each detected value detected in the step (a) and an arrangement position of each of the temperature detecting means. 9. A step of connecting a plurality of points indicating a correspondence relationship with a spline curve to determine the waveform.
Nozzle temperature setting method of the injection molding machine according to. 10. The nozzle temperature setting method for an injection molding machine according to claim 8, wherein the step (c) includes a step of printing the waveform on a recording paper which can be read by an operator. 11. The step (c) includes the step of storing and storing the waveform in a storage medium readable by a controller of the second injection molding machine.
9. The method for setting the nozzle temperature of an injection molding machine according to 9 or 10. 12. The nozzle temperature setting method for an injection molding machine according to claim 11, wherein the step (d) includes a step of automatically setting a temperature control target value for each part of the nozzle.