Control device for injection molding machine and injection molding machine

Abstract

The present invention relates to a control device for an injection molding machine and an injection molding machine, which can reduce the labor and time required for inputting design conditions. The control device for an injection molding machine of the present invention includes a condition button display processing unit that displays a condition button that displays a setting condition of the injection molding machine set in the past on a display screen that displays the setting condition. According to the control device for the injection molding machine, even if the operator does not view a history record screen, he can switch the setting condition currently set to the setting condition set in the past by simply pressing a retroactive button or the like.

Description

[0001] This application is a divisional application of the original application with application date of January 8, 2020, application number 202010016346.6, and invention name “Control device of injection molding machine and injection molding machine”. Technical Field

[0002] This application claims priority based on Japanese Patent Application No. 2019-016418 filed on January 31, 2019. The entire contents of the Japanese application are incorporated herein by reference.

[0003] The invention relates to a control device of an injection molding machine and the injection molding machine. Background Art

[0004] In order to mold qualified products by injection molding, it is necessary to adjust the setting conditions. The setting conditions are the action conditions set for each process such as mold closing, injection, pressure holding, metering, mold opening, and ejection performed by the injection molding machine. The setting conditions are the conditions used to make the injection molding machine move during molding, so they are also called molding conditions. In the adjustment work of the setting conditions, for example, the setting conditions are changed little by little until qualified products are molded to find the best setting conditions, and repeated verification is performed. Therefore, sometimes the setting conditions saved in the past are read and the setting conditions are further adjusted accordingly. Patent document 1 discloses a technology for displaying the setting conditions saved in the past on the screen of a display device. When adjusting the setting conditions using this display device, the setting history of the setting conditions saved in the past is displayed on the screen of the display device, and the operator remembers the setting conditions described therein or records them by the operator, and then returns to the screen for inputting the setting conditions to input the setting conditions.

[0005] Patent Document 1: Japanese Patent No. 5654064

[0006] However, in the prior art disclosed in Patent Document 1, the operator needs to remember the setting conditions described in the screen displaying the setting history, and then return to the screen for inputting the setting conditions to input them. Therefore, there is a possibility of misremembering or inputting errors, and there is also the problem of wasting labor and time required to input the design conditions. Summary of the invention

[0007] In view of the above problems, the present invention can reduce the labor and time required for inputting design conditions.

[0008] A control device for an injection molding machine according to one aspect of the embodiment includes a condition button display processing unit that displays a condition button that displays a setting condition of the injection molding machine that was set in the past on a display screen that displays the setting condition.

[0009] Effects of the Invention

[0010] According to one aspect of the embodiment, it is possible to reduce the effort and time required to input design conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a diagram showing a state of the injection molding machine according to one embodiment when mold opening is completed.

[0012] Figure 2 It is a diagram showing a state of the injection molding machine according to one embodiment when the mold is clamped.

[0013] Figure 3 It is a diagram showing the respective components of an operating device, a control device, and a display device included in an injection molding machine according to one embodiment.

[0014] Figure 4 It is a diagram showing a first example of a screen displayed on a display device provided in an injection molding machine according to an embodiment.

[0015] Figure 5 It is a diagram showing an example of a pull-down menu displayed in the V / P switching mode selection field.

[0016] Figure 6 This is a diagram showing an example of a history list screen displayed when the history button is pressed.

[0017] Figure 7 This is a diagram for explaining how the setting conditions displayed on the first screen 21 a are switched when the trace button 751 or the shift button 752 is pressed.

[0018] Figure 8 This is a flowchart of the switching process of setting conditions.

[0019] Fig. 9 It is a diagram showing a second example of a screen displayed on the display device provided in the injection molding machine according to the embodiment.

[0020] Fig.10 This is a diagram showing an example of the management item selection screen 70 .

[0021] Fig.11 This is a diagram showing an example of the setting history of management items displayed when the history button is pressed.

[0022] Fig.12 This is a diagram for explaining how the management item displayed on the fourth screen 21d is switched when the trace button 751 or the shift button 752 is pressed.

[0023] Fig.13 A flowchart for managing the switching process of items.

[0024] Fig.14 It is a diagram showing a third example of a screen displayed on the display device provided in the injection molding machine according to the embodiment.

[0025] Fig.15 It is a diagram for explaining a specific example of information selected using the waveform selection field 60 , the waveform number selection field 63 , and the waveform color selection field 64 .

[0026] Fig.16 This is a diagram showing an example of the setting history of the waveform displayed when the history button is pressed.

[0027] Fig.17 This is a diagram for explaining how the waveform displayed on the waveform display screen 80 is switched when the trace button 751 or the shift button 752 is pressed.

[0028] Fig.18 This is a flowchart of the waveform switching process.

[0029] In the figure: 10-injection molding machine, 20-display screen, 21-condition display unit, 21a-1st screen, 21b-2nd screen, 21c-3rd screen, 21d-4th screen, 22-button display unit, 51-input bar, 52a-position switching button, 52b-pressure switching button, 52c-external input button, 60-waveform selection bar, 100-mold clamping device, 220-driving mechanism, 300-injection device, 400-moving device, 700-control device, 727-condition button display processing unit, 723-history display processing unit, 750-operating device, 751-trace button, 752-push button, 753-history button, 754-condition button, 760-display device, 800-mold device. DETAILED DESCRIPTION

[0030] Hereinafter, the mode for implementing the present invention will be described with reference to the drawings. In each of the drawings, the same or corresponding structures are denoted by the same corresponding symbols, and their description is omitted.

[0031] (Injection Molding Machine)

[0032] Figure 1 It is a diagram showing a state of the injection molding machine according to one embodiment when mold opening is completed. Figure 2 1 is a diagram showing a state of an injection molding machine involved in an embodiment when the mold is clamped. In this specification, the X-axis direction, the Y-axis direction and the Z-axis direction are directions perpendicular to each other. The X-axis direction and the Y-axis direction represent horizontal directions, and the Z-axis direction represents a vertical direction. When the clamping device 100 is horizontal, the X-axis direction is the mold opening and closing direction, and the Y-axis direction is the width direction of the injection molding machine 10. The negative side of the Y-axis direction is called the operation side, and the positive side of the Y-axis direction is called the operation opposite side.

[0033] like Figure 1-2 As shown, the injection molding machine 10 includes a mold clamping device 100, an ejection device 200, an injection device 300, a moving device 400, a control device 700, and a frame 900. The frame 900 includes a mold clamping device frame 910 and an injection device frame 920. The mold clamping device frame 910 and the injection device frame 920 are respectively installed on the floor 2 via a leveling adjuster 930. The control device 700 is arranged in the internal space of the injection device frame 920. Hereinafter, each component of the injection molding machine 10 will be described.

[0034] (Mold clamping device)

[0035] In the description of the mold clamping device 100, the moving direction of the movable platen 120 when the mold is closed (for example, the positive direction of the X axis) is set to the front, and the moving direction of the movable platen 120 when the mold is opened (for example, the negative direction of the X axis) is set to the rear.

[0036] The mold clamping device 100 performs mold closing, pressure increase, mold clamping, pressure reduction, and mold opening of the mold device 800. The mold device 800 includes a fixed mold 810 and a movable mold 820.

[0037] The mold clamping device 100 is, for example, horizontal, and has a fixed platen 110 , a movable platen 120 , a toggle seat 130 , a connecting rod 140 , a toggle mechanism 150 , a mold clamping motor 160 , a motion conversion mechanism 170 and a mold thickness adjustment mechanism 180 .

[0038] The fixed platen 110 is fixed to the mold clamping device frame 910. The fixed mold 810 is attached to the surface of the fixed platen 110 that faces the movable platen 120.

[0039] The movable platen 120 is arranged on the mold clamping device frame 910 so as to be movable in the mold opening and closing direction. A guide 101 for guiding the movable platen 120 is laid on the mold clamping device frame 910. The movable mold 820 is installed on the surface of the movable platen 120 facing the fixed platen 110. The movable platen 120 is moved forward and backward relative to the fixed platen 110, thereby performing mold closing, pressure increase, mold clamping, pressure reduction, and mold opening of the mold device 800.

[0040] The toggle seat 130 is disposed at a distance from the fixed platen 110 and is mounted on the mold clamping device frame 910 so as to be movable in the mold opening and closing direction. In addition, the toggle seat 130 can be movably disposed along a guide member laid on the mold clamping device frame 910. The guide member of the toggle seat 130 can be common to the guide member 101 of the movable platen 120.

[0041] In addition, in the present embodiment, the fixed pressure plate 110 is fixed to the mold clamping device frame 910, and the elbow seat 130 is configured to be freely movably arranged on the mold clamping device frame 910 in the mold opening and closing direction. However, the elbow seat 130 may also be fixed to the mold clamping device frame 910, and the fixed pressure plate 110 may be freely movably arranged on the mold clamping device frame 910 in the mold opening and closing direction.

[0042] The connecting rod 140 connects the fixed platen 110 and the toggle seat 130 at a distance L in the mold opening and closing direction. A plurality of connecting rods 140 (e.g., four) may be used. The plurality of connecting rods 140 are arranged in parallel with the mold opening and closing direction and extend according to the mold clamping force. A connecting rod strain detector 141 for detecting the strain of the connecting rod 140 may be provided on at least one connecting rod 140. The connecting rod strain detector 141 sends a signal indicating its detection result to the control device 700. The detection result of the connecting rod strain detector 141 is used for detecting the mold clamping force, etc.

[0043] In addition, in the present embodiment, the tie rod strain detector 141 is used as the mold clamping force detector for detecting the mold clamping force, but the present invention is not limited to this. The mold clamping force detector is not limited to a strain type mold clamping force detector, and may be a piezoelectric, capacitive, hydraulic, or electromagnetic mold clamping force detector, etc., and its installation position is not limited to the tie rod 140.

[0044] The toggle mechanism 150 is arranged between the movable platen 120 and the toggle seat 130, and moves the movable platen 120 in the mold opening and closing direction relative to the toggle seat 130. The toggle mechanism 150 is composed of a crosshead 151 and a pair of connecting rods. The pair of connecting rods respectively have a first connecting rod 152 and a second connecting rod 153 connected by a pin or the like so as to be able to bend and stretch freely. The first connecting rod 152 is mounted on the movable platen 120 by a pin or the like so as to be able to swing freely. The second connecting rod 153 is mounted on the toggle seat 130 by a pin or the like so as to be able to swing freely. The second connecting rod 153 is mounted on the crosshead 151 via the third connecting rod 154. If the crosshead 151 is moved forward and backward relative to the toggle seat 130, the first connecting rod 152 and the second connecting rod 153 are bent and stretched, and the movable platen 120 is moved forward and backward relative to the toggle seat 130.

[0045] In addition, the structure of the toggle mechanism 150 is not limited to Figure 1 and Figure 2 For example, in Figure 1 and Figure 2 In the embodiment, the number of nodes of each link group is 5, but may be 4, and one end of the third link 154 may be connected to the node of the first link 152 and the second link 153.

[0046] The mold clamping motor 160 is mounted on the toggle base 130 and operates the toggle mechanism 150. The mold clamping motor 160 advances and retreats the crosshead 151 relative to the toggle base 130, thereby bending and extending the first link 152 and the second link 153, and advancing and retreating the movable platen 120 relative to the toggle base 130. The mold clamping motor 160 is directly connected to the motion conversion mechanism 170, but may also be connected to the motion conversion mechanism 170 via a belt, a pulley, or the like.

[0047] The motion conversion mechanism 170 converts the rotational motion of the mold clamping motor 160 into the linear motion of the cross head 151. The motion conversion mechanism 170 includes a screw shaft and a screw nut screwed to the screw shaft. Balls or rollers may be interposed between the screw shaft and the screw nut.

[0048] The mold clamping device 100 performs a mold closing process, a pressure increasing process, a mold clamping process, a pressure reducing process, a mold opening process, and the like under the control of the control device 700 .

[0049] In the mold closing process, the mold clamping motor 160 is driven to move the crosshead 151 to the mold closing end position at a set moving speed, thereby moving the movable platen 120 forward and bringing the movable mold 820 into contact with the fixed mold 810. For example, the mold clamping motor encoder 161 is used to detect the position and moving speed of the crosshead 151. The mold clamping motor encoder 161 detects the rotation of the mold clamping motor 160 and sends a signal indicating the detection result to the control device 700.

[0050] In addition, the crosshead position detector for detecting the position of the crosshead 151 and the crosshead moving speed detector for detecting the moving speed of the crosshead 151 are not limited to the mold clamping motor encoder 161, and a general detector can be used. In addition, the movable platen position detector for detecting the position of the movable platen 120 and the movable platen moving speed detector for detecting the moving speed of the movable platen 120 are not limited to the mold clamping motor encoder 161, and a general detector can be used.

[0051] In the pressure increasing step, the mold clamping motor 160 is further driven to further advance the cross head 151 from the mold closing end position to the mold clamping position, thereby generating a mold clamping force.

[0052] In the mold clamping process, the mold clamping motor 160 is driven to maintain the position of the crosshead 151 at the mold clamping position. In the mold clamping process, the mold clamping force generated in the pressure increasing process is maintained. In the mold clamping process, a cavity space 801 is formed between the movable mold 820 and the fixed mold 810 (refer to Figure 2 ), the injection device 300 fills the liquid molding material into the cavity space 801. The filled molding material solidifies, thereby obtaining a molded product.

[0053] The number of cavity spaces 801 may be one or more. In the latter case, multiple molded products can be obtained at the same time. An insert may be arranged in a part of the cavity space 801, and a molding material may be filled in another part of the cavity space 801. A molded product in which the insert and the molding material are integrated can be obtained.

[0054] In the decompression process, the mold clamping motor 160 is driven to retract the crosshead 151 from the mold clamping position to the mold opening start position, thereby retracting the movable platen 120 to reduce the mold clamping force. The mold opening start position and the mold closing end position may be the same position.

[0055] In the mold opening process, the mold clamping motor 160 is driven to move the crosshead 151 backward from the mold opening start position to the mold opening end position at a set moving speed, thereby moving the movable platen 120 backward and separating the movable mold 820 from the fixed mold 810. Then, the ejector device 200 ejects the molded product from the movable mold 820.

[0056] The setting conditions in the mold closing process, the pressure increasing process and the mold clamping process are set together as a series of setting conditions. For example, the moving speed and position (including the mold closing start position, the moving speed switching position, the mold closing end position and the mold clamping position) and the mold clamping force of the crosshead 151 in the mold closing process and the pressure increasing process are set together as a series of setting conditions. The mold closing start position, the moving speed switching position, the mold closing end position and the mold clamping position are arranged in sequence from the back to the front, indicating the starting point and end point of the interval for setting the moving speed. Set the moving speed in each interval. The moving speed switching position can be one or more. The moving speed switching position can also be not set. Only one of the mold clamping position and the mold clamping force can be set.

[0057] The setting conditions in the decompression process and the mold opening process are also set in the same way. For example, the moving speed and position (mold opening start position, moving speed switching position and mold opening end position) of the crosshead 151 in the decompression process and the mold opening process are set together as a series of setting conditions. The mold opening start position, the moving speed switching position and the mold opening end position are arranged in sequence from the front to the back, indicating the starting point and end point of the interval for setting the moving speed. The moving speed is set in each interval. The moving speed switching position can be one or more. The moving speed switching position can also be not set. The mold opening start position and the mold closing end position can be the same position. In addition, the mold opening end position and the mold closing start position can be the same position.

[0058] In addition, the moving speed and position of the movable platen 120 may be set instead of the moving speed and position of the crosshead 151. Furthermore, the mold clamping force may be set instead of the position of the crosshead (eg, mold clamping position) and the position of the movable platen.

[0059] The toggle mechanism 150 increases the driving force of the mold clamping motor 160 and transmits it to the movable platen 120. This increase ratio is also called the toggle ratio. The toggle ratio changes according to the angle θ (hereinafter, also referred to as "link angle θ") formed by the first link 152 and the second link 153. The link angle θ is obtained from the position of the crosshead 151. When the link angle θ is 180°, the toggle ratio is maximum.

[0060] When the thickness of the mold device 800 changes due to replacement of the mold device 800 or temperature change of the mold device 800, mold thickness adjustment is performed to obtain a predetermined mold clamping force when the mold is clamped. In the mold thickness adjustment, for example, the interval L between the fixed platen 110 and the toggle seat 130 is adjusted so that the link angle θ of the toggle mechanism 150 becomes a predetermined angle at the mold contact moment when the movable mold 820 contacts the fixed mold 810.

[0061] The mold clamping device 100 has a mold thickness adjustment mechanism 180. The mold thickness adjustment mechanism 180 adjusts the mold thickness by adjusting the interval L between the fixed platen 110 and the toggle seat 130. In addition, regarding the mold thickness adjustment time, for example, it is performed during the period from the end of the molding cycle to the start of the next molding cycle. The mold thickness adjustment mechanism 180 has, for example, a screw shaft 181 formed at the rear end of the connecting rod 140, a screw nut 182 held on the toggle seat 130 in a manner that allows free rotation and cannot move forward or backward, and a mold thickness adjustment motor 183 that rotates the screw nut 182 screwed on the screw shaft 181.

[0062] The lead screw shaft 181 and the lead screw nut 182 are provided on each connecting rod 140. The rotational driving force of the mold thickness adjustment motor 183 can be transmitted to the plurality of lead screw nuts 182 via the rotational driving force transmission unit 185. The plurality of lead screw nuts 182 can be rotated synchronously. In addition, the plurality of lead screw nuts 182 can be rotated individually by changing the transmission path of the rotational driving force transmission unit 185.

[0063] The rotational driving force transmission part 185 is composed of, for example, gears. In this case, a driven gear is formed on the outer periphery of each lead screw nut 182, a driving gear is mounted on the output shaft of the mold thickness adjustment motor 183, and an intermediate gear meshing with a plurality of driven gears and the driving gear is rotatably held in the center of the toggle seat 130. In addition, the rotational driving force transmission part 185 may be composed of a conveyor belt and a pulley instead of a gear.

[0064] The operation of the mold thickness adjustment mechanism 180 is controlled by the control device 700. The control device 700 drives the mold thickness adjustment motor 183 to rotate the lead screw nut 182. As a result, the position of the toggle seat 130 relative to the connecting rod 140 is adjusted, and the interval L between the fixed platen 110 and the toggle seat 130 is adjusted. In addition, a plurality of mold thickness adjustment mechanisms may be used in combination.

[0065] The mold thickness adjustment motor encoder 184 is used to detect the interval L. The mold thickness adjustment motor encoder 184 detects the rotation amount and rotation direction of the mold thickness adjustment motor 183, and sends a signal indicating the detection result to the control device 700. The detection result of the mold thickness adjustment motor encoder 184 is used to monitor and control the position of the toggle seat 130 and the interval L. In addition, the toggle seat position detector for detecting the position of the toggle seat 130 and the interval detector for detecting the interval L are not limited to the mold thickness adjustment motor encoder 184, and a general detector can be used.

[0066] Furthermore, the mold clamping device 100 of the present embodiment is a horizontal type mold clamping device in which the mold opening and closing direction is the horizontal direction, but may be a vertical type mold clamping device in which the mold opening and closing direction is the vertical direction.

[0067] The mold clamping device 100 of this embodiment includes the mold clamping motor 160 as a driving source, but may include a hydraulic cylinder instead of the mold clamping motor 160. Furthermore, the mold clamping device 100 may include a linear motor for mold opening and closing and an electromagnet for mold clamping.

[0068] (Ejector device)

[0069] In the description of the ejection device 200, similar to the description of the mold clamping device 100, the moving direction of the movable platen 120 when the mold is closed (for example, the positive direction of the X-axis) is set to the front and the moving direction of the movable platen 120 when the mold is opened (for example, the negative direction of the X-axis) is set to the rear.

[0070] The ejector device 200 is attached to the movable platen 120 and moves forward and backward together with the movable platen 120. The ejector device 200 includes an ejector rod 210 for ejecting a molded product from the mold device 800 and a drive mechanism 220 for moving the ejector rod 210 in the X-axis direction.

[0071] The ejector rod 210 is configured to be able to move forward and backward in the through hole of the movable platen 120. The front end of the ejector rod 210 contacts the movable member 830 configured to be able to move forward and backward inside the movable mold 820. The front end of the ejector rod 210 may be connected to the movable member 830 or may not be connected thereto.

[0072] The driving mechanism 220 includes, for example, an ejector motor and a motion conversion mechanism that converts the rotational motion of the ejector motor into the linear motion of the ejector rod 210. The motion conversion mechanism includes a screw shaft and a screw nut screwed with the screw shaft. Balls or rollers may be interposed between the screw shaft and the screw nut.

[0073] The ejector device 200 performs an ejection process under the control of the control device 700. In the ejection process, the ejector rod 210 is moved forward from the standby position to the ejection position at a set moving speed, so that the movable member 830 is moved forward to eject the molded product. Thereafter, the ejector motor is driven to move the ejector rod 210 backward at a set moving speed, so that the movable member 830 is moved backward to the original standby position.

[0074] For example, an ejector motor encoder is used to detect the position and moving speed of the ejector rod 210. The ejector motor encoder detects the rotation of the ejector motor and sends a signal indicating the detection result to the control device 700. In addition, the ejector rod position detector for detecting the position of the ejector rod 210 and the ejector rod moving speed detector for detecting the moving speed of the ejector rod 210 are not limited to the ejector motor encoder, and a general detector can be used.

[0075] (Injection device)

[0076] In the description of the injection device 300, unlike the description of the mold clamping device 100 and the description of the ejection device 200, the moving direction of the screw 330 during filling (for example, the negative direction of the X-axis) is set to the front and the moving direction of the screw 330 during metering (for example, the positive direction of the X-axis) is set to the rear.

[0077] The injection device 300 is provided on a sliding base 301, and the sliding base 301 is configured to be able to move forward and backward relative to the injection device frame 920. The injection device 300 is configured to be able to move forward and backward relative to the mold device 800. The injection device 300 contacts the mold device 800 and fills the molding material into the cavity space 801 in the mold device 800. The injection device 300 has, for example, a cylinder 310, a nozzle 320, a screw 330, a metering motor 340, an injection motor 350, a pressure detector 360, and the like.

[0078] The cylinder 310 heats the molding material supplied from the supply port 311. The molding material includes, for example, resin. The molding material is formed into, for example, granules and supplied to the supply port 311 in a solid state. The supply port 311 is formed at the rear of the cylinder 310. A cooler 312 such as a water-cooled cylinder is provided on the periphery of the rear of the cylinder 310. A heater 313 such as a belt heater and a temperature detector 314 are provided on the periphery of the cylinder 310 in front of the cooler 312.

[0079] The cylinder 310 is divided into a plurality of regions in the axial direction (e.g., X-axis direction) of the cylinder 310. Heaters 313 and temperature detectors 314 are respectively provided in the plurality of regions. Set temperatures are set for the plurality of regions, and the control device 700 controls the heater 313 so that the detected temperature of the temperature detector 314 becomes the set temperature.

[0080] The nozzle 320 is provided at the front end of the cylinder 310 and is pressed against the mold device 800. A heater 313 and a temperature detector 314 are provided on the outer periphery of the nozzle 320. The control device 700 controls the heater 313 so that the detected temperature of the nozzle 320 becomes a set temperature.

[0081] The screw 330 is arranged in the cylinder 310 so as to be rotatable and to be able to move forward and backward. When the screw 330 is rotated, the molding material is transported forward along the spiral groove of the screw 330. While being transported forward, the molding material is gradually melted by the heat from the cylinder 310. As the liquid molding material is transported forward to the front of the screw 330 and accumulated in the front part of the cylinder 310, the screw 330 moves backward. Then, when the screw 330 is moved forward, the liquid molding material accumulated in front of the screw 330 is ejected from the nozzle 320 and filled into the mold device 800.

[0082] A check ring 331 is installed at the front of the screw 330 so as to be able to move forward and backward as a check valve. The check ring 331 prevents the molding material from flowing back from the front to the rear of the screw 330 when the screw 330 is pushed forward.

[0083] When the screw 330 is advanced, the check ring 331 is pushed backward by the pressure of the molding material in front of the screw 330, and retreats relative to the screw 330 to a closed position that blocks the flow path of the molding material (refer to Figure 2 ). Thus, the molding material accumulated in front of the screw 330 is prevented from flowing back to the rear.

[0084] On the other hand, when the screw 330 is rotated, the check ring 331 is pushed forward by the pressure of the molding material delivered to the front along the spiral groove of the screw 330, and moves forward relative to the screw 330 to an open position (refer to Figure 1 ). As a result, the molding material is transported to the front of the screw 330.

[0085] The check ring 331 may be a co-rotating type that rotates with the screw 330 or a non-co-rotating type that does not rotate with the screw 330. In addition, the injection device 300 may include a drive source that moves the check ring 331 forward and backward relative to the screw 330 between the open position and the closed position.

[0086] The metering motor 340 rotates the screw 330. The driving source for rotating the screw 330 is not limited to the metering motor 340, and may be, for example, a hydraulic pump or the like.

[0087] The injection motor 350 moves the screw 330 forward and backward. A motion conversion mechanism is provided between the injection motor 350 and the screw 330 to convert the rotational motion of the injection motor 350 into the linear motion of the screw 330. The motion conversion mechanism includes, for example, a screw shaft and a screw nut screwed to the screw shaft. Balls and rollers may be provided between the screw shaft and the screw nut. The driving source for moving the screw 330 forward and backward is not limited to the injection motor 350, and may be, for example, a hydraulic cylinder.

[0088] The pressure detector 360 detects the force transmitted between the injection motor 350 and the screw 330. The detected force is converted into pressure by the control device 700. The pressure detector 360 is provided in the force transmission path between the injection motor 350 and the screw 330, and detects the force acting on the pressure detector 360.

[0089] The pressure detector 360 sends a signal indicating its detection result to the control device 700. The detection result of the pressure detector 360 is used to control and monitor the pressure applied to the screw 330 by the molding material, the back pressure on the screw 330, the pressure applied to the molding material from the screw 330, and the like.

[0090] The injection device 300 performs a metering process, a filling process, a pressure-maintaining process, etc. under the control of the control device 700. The filling process and the pressure-maintaining process are also collectively referred to as an injection process.

[0091] In the metering process, the metering motor 340 is driven to rotate the screw 330 at a set speed, and the molding material is transported to the front along the spiral groove of the screw 330. As a result, the molding material gradually melts. As the liquid molding material is transported to the front of the screw 330 and accumulated in the front part of the cylinder 310, the screw 330 moves backward. For example, the metering motor encoder 341 is used to detect the rotation speed of the screw 330. The metering motor encoder 341 detects the rotation of the metering motor 340 and sends a signal indicating the detection result to the control device 700. In addition, the screw speed detector that detects the rotation speed of the screw 330 is not limited to the metering motor encoder 341, and a common screw speed detector can be used.

[0092] In order to prevent the screw 330 from suddenly retreating during the metering process, the injection motor 350 may be driven to apply a set back pressure to the screw 330. For example, the back pressure on the screw 330 is detected using the pressure detector 360. The pressure detector 360 sends a signal indicating the detection result to the control device 700. When the screw 330 retreats to the metering end position and a predetermined amount of molding material is accumulated in front of the screw 330, the metering process ends.

[0093] The position and speed of the screw 330 in the metering process are set together as a series of setting conditions. For example, the metering start position, the speed switching position and the metering end position are set. These positions are arranged in sequence from the front to the back, indicating the starting point and the end point of the interval for setting the speed. The speed is set in each interval. The speed switching position can be one or more. The speed switching position can also be not set. In addition, the back pressure is set in each interval.

[0094] In the filling process, the injection motor 350 is driven to make the screw 330 move forward at a set moving speed, so that the liquid molding material accumulated in front of the screw 330 is filled in the cavity space 801 in the mold device 800. For example, the injection motor encoder 351 is used to detect the position and moving speed of the screw 330. The injection motor encoder 351 detects the rotation of the injection motor 350 and sends a signal indicating its detection result to the control device 700. If the position of the screw 330 reaches the set position, the switching from the filling process to the holding pressure process (the so-called V / P switching) is performed. The position where the V / P switching is performed is also called the V / P switching position. The set moving speed of the screw 330 can be changed according to the position and time of the screw 330.

[0095] The position and moving speed of the screw 330 in the filling process are set as a series of setting conditions. For example, the filling start position (also called the "injection start position"), the moving speed switching position and the V / P switching position are set. These positions are arranged in sequence from the back to the front, indicating the starting point and the end point of the interval for setting the moving speed. The moving speed is set in each interval. There can be one or more moving speed switching positions. It is also possible not to set the moving speed switching position.

[0096] The upper limit value of the pressure of the screw 330 is set in each interval of setting the moving speed of the screw 330. The pressure of the screw 330 is detected by the pressure detector 360. When the detection value of the pressure detector 360 is less than the set pressure, the screw 330 moves forward at the set moving speed. On the other hand, when the detection value of the pressure detector 360 exceeds the set pressure, the screw 330 moves forward at a moving speed slower than the set moving speed for the purpose of protecting the mold until the detection value of the pressure detector 360 becomes less than the set pressure.

[0097] In addition, in the filling process, after the position of the screw 330 reaches the V / P switching position, the screw 330 can be temporarily stopped at the V / P switching position, and then the V / P switching can be performed. Instead of stopping the screw 330, the screw 330 can be moved forward or backward at a low speed just before the V / P switching. In addition, the screw position detector for detecting the position of the screw 330 and the screw moving speed detector for detecting the moving speed of the screw 330 are not limited to the injection motor encoder 351, and a common screw position detector can be used.

[0098] In the pressure holding process, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material in the front end of the screw 330 (hereinafter also referred to as "holding pressure") is maintained at a set pressure, and the molding material remaining in the cylinder 310 is pushed toward the mold device 800. The insufficient amount of molding material caused by the cooling shrinkage in the mold device 800 can be supplemented. For example, the holding pressure is detected using a pressure detector 360. The pressure detector 360 sends a signal indicating its detection result to the control device 700. The setting value of the holding pressure can be changed according to the time elapsed after the start of the pressure holding process, etc. The holding pressure and the holding time of the holding pressure in the pressure holding process can be set separately in multiples, or can be set together as a series of setting conditions.

[0099] In the pressure holding process, the molding material in the cavity space 801 in the mold device 800 is gradually cooled, and at the end of the pressure holding process, the entrance of the cavity space 801 is blocked by the solidified molding material. This state is called gate sealing, which prevents the backflow of the molding material from the cavity space 801. After the pressure holding process, the cooling process begins. The molding material in the cavity space 801 is solidified in the cooling process. In order to shorten the molding cycle time, a metering process can be performed during the cooling process.

[0100] In addition, the injection device 300 of the present embodiment is a coaxial screw injection device, but it may also be a pre-plastic injection device or the like. The pre-plastic injection device supplies the molding material melted in the plasticizing cylinder to the injection cylinder, and ejects the molding material from the injection cylinder into the mold device. In the plasticizing cylinder, the screw is configured to be rotatable and unable to advance or retreat, or the screw is configured to be rotatable and able to advance and retreat freely. On the other hand, in the injection cylinder, the plunger is configured to be able to advance and retreat freely.

[0101] Furthermore, the injection device 300 of the present embodiment is a horizontal injection device in which the axial direction of the cylinder 310 is in the horizontal direction, but it may be a vertical injection device in which the axial direction of the cylinder 310 is in the vertical direction. The mold clamping device combined with the vertical injection device 300 may be a vertical mold clamping device or a horizontal mold clamping device. Similarly, the mold clamping device combined with the horizontal injection device 300 may be a horizontal mold clamping device or a vertical mold clamping device.

[0102] (Mobile device)

[0103] In the description of the moving device 400, similar to the description of the injection device 300, the moving direction of the screw 330 during filling (e.g., the negative direction of the X axis) is set to the front and the moving direction of the screw 330 during metering (e.g., the positive direction of the X axis) is set to the rear.

[0104] The moving device 400 moves the injection device 300 forward and backward relative to the mold device 800. In addition, the moving device 400 presses the nozzle 320 against the mold device 800 and generates nozzle contact pressure. The moving device 400 includes a hydraulic pump 410, a motor 420 as a driving source, and a hydraulic cylinder 430 as a hydraulic actuator. When the motor 420 is driven, the hydraulic pump 410 supplies hydraulic pressure to the hydraulic cylinder 430, and the hydraulic cylinder 430 moves the injection device 300 forward and backward by the hydraulic pressure.

[0105] In this embodiment, the moving device 400 includes the hydraulic cylinder 430 , but the present invention is not limited thereto. For example, an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the injection device 300 may be used instead of the hydraulic cylinder 430 .

[0106] (Control device)

[0107] The control device 700 is constituted by a computer, for example. Figure 1-2 As shown, the control device 700 has a CPU (Central Processing Unit) 701, a storage medium such as a memory 702, an input interface 703, and an output interface 704. The control device 700 performs various controls by causing the CPU 701 to execute a program stored in the storage medium 702. In addition, the control device 700 receives a signal from the outside through the input interface 703, and sends a signal to the outside through the output interface 704.

[0108] The control device 700 repeatedly performs the metering process, mold closing process, pressure increasing process, mold closing process, filling process, pressure holding process, cooling process, decompression process, mold opening process and ejection process, thereby repeatedly manufacturing the molded product. A series of actions for obtaining the molded product, such as the actions from the start of the metering process to the start of the next metering process, are also referred to as "injection" or "molding cycle". In addition, the time required for one injection is also referred to as "molding cycle time" or "cycle time".

[0109] A molding cycle, for example, includes a metering process, a mold closing process, a pressure increasing process, a mold closing process, a filling process, a pressure holding process, a cooling process, a decompression process, a mold opening process, and an ejection process in sequence. The order here is the order in which each process starts. The filling process, the pressure holding process, and the cooling process are performed during the mold closing process. The start of the mold closing process can coincide with the start of the filling process. The end of the decompression process coincides with the start of the mold opening process.

[0110] In addition, in order to shorten the molding cycle time, multiple processes can be performed simultaneously. For example, the metering process can be performed during the cooling process of the previous molding cycle, or during the mold closing process. In this case, the mold closing process can be set to be performed at the beginning of the molding cycle. In addition, the filling process can be started during the mold closing process. In addition, the ejection process can be started during the mold opening process. When an on-off valve is provided to open and close the flow path of the nozzle 320, the mold opening process can be started during the metering process. This is because, even if the mold opening process is started during the metering process, if the on-off valve closes the flow path of the nozzle 320, the molding material will not leak from the nozzle 320.

[0111] In addition, a primary molding cycle may include processes other than the metering process, the mold closing process, the pressure increasing process, the mold clamping process, the filling process, the pressure holding process, the cooling process, the decompression process, the mold opening process, and the ejection process.

[0112] For example, after the pressure holding process is completed and before the metering process begins, a pre-metering suction process can be performed to retract the screw 330 to a preset metering start position. The pressure of the molding material accumulated in front of the screw 330 before the metering process begins can be reduced, thereby preventing the screw 330 from retreating sharply when the metering process begins.

[0113] Furthermore, after the metering process is completed and before the filling process begins, a post-metering backsucking process may be performed in which the screw 330 is retracted to a preset filling start position (also referred to as an "injection start position"). The pressure of the molding material accumulated in front of the screw 330 before the filling process begins can be reduced, thereby preventing the molding material from leaking from the nozzle 320 before the filling process begins.

[0114] The control device 700 is connected to the operating device 750 and the display device 760. The operating device 750 receives an input operation from a user and outputs a signal corresponding to the input operation to the control device 700. The display device 760 displays a display screen corresponding to the input operation in the operating device 750 under the control of the control device 700.

[0115] The display screen is used for setting the injection molding machine 10. A plurality of display screens are prepared, and the display is switched or overlapped. The user operates the operating device 750 while observing the display screen displayed on the display device 760 to set the injection molding machine 10 (including input of setting values).

[0116] The operating device 750 and the display device 760 may be formed of, for example, a touch panel and integrated. In addition, the operating device 750 and the display device 760 of the present embodiment are integrated, but may be provided independently. In addition, a plurality of operating devices 750 may be provided. The operating device 750 and the display device 760 are arranged on the negative side of the Y-axis direction of the mold clamping device 100 (more specifically, the fixed platen 110). The negative side of the Y-axis direction is referred to as the operating side, and the positive side of the Y-axis direction is referred to as the opposite side of the operation.

[0117] Figure 3 It is a diagram showing the respective components of an operating device, a control device, and a display device included in an injection molding machine according to one embodiment.

[0118] like Figure 3 As shown, the operation device 750 includes a condition button 754, a history button 753, and an operation button 755. The condition button 754 is a button for displaying setting conditions set in the past, and includes a retrospective button 751 and a shift button 752.

[0119] The traceback button 751 is a button for displaying setting conditions set in the past in a chronological direction. The traceback button 751 is a button for displaying setting conditions set in the past, and is a button for displaying setting conditions set in the past in a chronological direction. The traceback button 751 is a button for displaying setting conditions set in a chronological direction relative to the current setting conditions. The traceback button 751 is a button for displaying setting conditions set in a chronological direction. The traceback button 751 is a button for displaying setting conditions set in the past in a chronological direction on the condition display unit 21.

[0120] The shift button 752 is a button for displaying the setting conditions set in the past in a chronological direction. The shift button 752 is a button for displaying the setting conditions set in the past, and is a button for displaying the setting conditions set in the past in chronological order. The shift button 752 is a button for displaying the setting conditions set in a chronological direction relative to the current setting conditions. The shift button 752 is a button for displaying the setting conditions set in a chronological direction. Here, the shift direction is the opposite direction to the chronological direction.

[0121] The history button 753 is a button for arranging the setting conditions set in the past as setting history in chronological order and displaying them in a list. An example of displaying the condition setting history displayed when the history button 753 is pressed will be described later. In addition, the trace button 751, the shift button 752, and the history button 753 are not limited to touch panel display buttons, but may also be mechanical buttons.

[0122] The operation button 755 is, for example, a mechanical button such as a mold opening button for causing the mold clamping device 100 to perform a mold opening action of the mold device 800, or a mold closing button for causing the mold clamping device 100 to perform a mold closing action of the mold device 800. The type of the operation button 755 is not limited thereto. The operation button 755 may be a touch panel button or a mechanical button.

[0123] like Figure 3 As shown, the display device 760 includes a button display unit 22, a condition display unit 21, and a history display unit 223a. The button display unit 22 displays condition buttons 754 such as a trace button 751 and a shift button 752, and a history button 753. The condition display unit 21 displays the set conditions. The history display unit 223a displays the history of the conditions set in the past.

[0124] like Figure 3 As shown, the control device 700 includes a CPU 701 , a storage medium 702 such as a memory, an input interface 703 for inputting external signals, and an output interface 704 for outputting external signals.

[0125] The control device 700 includes a button display processing unit 721, a condition display processing unit 722, a history display processing unit 723, a condition setting unit 724, and a molding operation unit 725. The button display processing unit 721, the condition display processing unit 722, the history display processing unit 723, the condition setting unit 724, and the molding operation unit 725 are functions implemented by causing the CPU 701 to execute a program stored in the storage medium 702. In addition, all or part of these functions may be implemented by hardware based on wired logic.

[0126] The button display processing unit 721 executes processing for displaying the condition button 754 and the history button 753 on the button display unit 22 of the display device 760. The button display processing unit 721 includes a condition button display processing unit 727 and a history button display processing unit 728.

[0127] The condition button display processing unit 727 displays the condition button 754 on the button display unit 22 of the display device 760. In order to display the trace button 751 and the push button 752 on the button display unit 22, the condition button display processing unit 727 reads the condition button image data stored in the storage medium 702, for example, and inputs it to the display device 760. The condition button image data is data indicating a pattern corresponding to each function of the trace button 751, the push button 752, etc.

[0128] The history button display processing unit 728 displays the history button 753 on the button display unit 22 of the display device 760. In order to display the history button 753 on the button display unit 22, the history button display processing unit 728 reads, for example, history button image data stored in the storage medium 702 and inputs the data to the display device 760. The history button image data is data indicating a pattern corresponding to the function of the history button 753.

[0129] The condition display processing unit 722 displays the setting conditions on the condition display unit 21 of the display device 760. In addition, the condition display processing unit 722 displays the setting conditions set in the past on the condition display unit 21 of the display device 760 according to the operation of the condition buttons 754 such as the trace button 751 and the shift button 752. The condition display processing unit 722 reads the setting condition data indicating the content of the setting conditions stored in the condition storage unit 729 according to the detection signal for detecting the pressing of the condition button 754, and inputs it to the display device 760. Thus, the setting conditions are displayed on the condition display unit 21 of the display device 760. The setting conditions are, for example, the action conditions set for each process such as mold closing, injection, pressure holding, metering, mold opening, and ejection performed by the injection molding machine 10. An example of displaying the setting conditions on the condition display unit 21 will be described later.

[0130] The history display processing unit 723 displays the setting conditions set in the past as setting history records on the history display unit 223a of the display device 760. The history display processing unit 723 displays the setting conditions set in the past on the history display unit 223a of the display device 760 in accordance with the operation of the history button 753. The history display processing unit 723 reads the history data indicating the contents of the history records of the setting conditions stored in the history storage unit 730 in accordance with the detection signal for detecting the pressing of the history button 753, and inputs the data to the display device 760. Thus, the history records of the setting conditions are displayed on the history display unit 223a of the display device 760. An example of displaying the history records of the setting conditions on the history display unit 223a will be described later.

[0131] The condition setting unit 724 sets the condition displayed on the condition display unit 21 as a setting condition. The condition setting unit 724 sets the condition input to the condition display unit 21 as a setting condition in response to an operation of a condition setting button (not shown) provided on the operating device 750 .

[0132] The molding operation unit 725 causes the injection molding machine 10 to perform a molding operation under the setting conditions set by the condition setting unit 724. The molding operation unit 725 performs a molding operation under the setting conditions set by the condition setting unit 724 in response to the operation of the operation button 755.

[0133] The storage medium 702 includes a condition storage unit 729 for storing setting condition data and a history storage unit 730 for storing history data indicating the contents of the history of setting conditions.

[0134] The display device 760 displays an image of the setting condition on the condition display unit 21 of the display device 760 based on the setting condition data input from the condition display processing unit 722 of the control device 700. Furthermore, the display device 760 displays an image of the history of the setting condition on the history display unit 223a of the display device 760 based on the history data input from the history display processing unit 723 of the control device 700.

[0135] The control device 700 of the present embodiment is characterized in that it includes a condition button display processing unit 727 that displays a condition button 754 that displays a setting condition set in the past on the display screen 20 that displays the setting condition.

[0136] Furthermore, the control device 700 of the present embodiment is characterized in that it includes a history button display processing unit 728 for displaying a history button 753 for displaying a history of setting conditions set in the past on the display screen 20 for displaying setting conditions.

[0137] Next, use Figure 4 A display example of the display screen 20 will be described. Figure 4 1 is a diagram showing a first example of a screen displayed on a display device provided in an injection molding machine according to an embodiment. A condition display section 21 and a button display section 22 are displayed on a display screen 20 of a display device 760 .

[0138] (Condition Display Section 21 of Display Screen 20)

[0139] The condition display section 21 of the display screen 20 displays a first screen 21a, a second screen 21b, and a third screen 21c for inputting setting conditions of the injection molding machine 10. Figures 4 to 8 The setting conditions described in correspond to the molding conditions for operating the injection molding machine 10 during molding.

[0140] (First Screen 21a of Condition Display Section 21)

[0141] A plurality of input fields for inputting setting conditions in the filling process are provided on the first screen 21a of the condition display unit 21. The filling process is to Figure 1 The process of filling the cavity space 801 in the mold device 800 shown in FIG. 8 is a process of filling the molding material into the cavity space 801 in the mold device 800. In the filling process, the injection motor 350 is driven to make the screw 330 move forward at a set speed, so that the liquid molding material accumulated in front of the screw 330 is filled into the cavity space 801 in the mold device 800. For example, the injection motor encoder 351 is used to detect the position and speed of the screw 330. The injection motor encoder 351 detects the rotation of the injection motor 350 and sends a signal indicating the detection result to the control device 700. If the position of the screw 330 reaches the set position, V / P switching is performed. V / P switching indicates switching from the filling process to the pressure holding process.

[0142] In the input field 30 of the first screen 21a, a numerical value representing the position at which the moving speed of the screw 330 is changed is input. The position at which the moving speed is changed is the desired position before the screw 330 that starts the action is about to reach the V / P switching position. For example, by touching the input field 30, a numeric key is displayed, so that an arbitrary value can be input using the numeric key. In addition, when there is no need to change the moving speed of the screw 330, a word such as "off" indicating that the moving speed is not changed is input in the input field 30. When inputting a word such as "off", for example, by touching the input field 30, the word "off" displayed in a pop-up manner can be selected.

[0143] A numerical value indicating the V / P switching position is input in the input field 31 of the first screen 21a. For example, by touching the input field 31, a numeric key is displayed, and an arbitrary value can be input using the numeric key. When the screw 330 reaches the V / P switching position, the speed-controlled filling process is switched to the pressure-controlled holding process.

[0144] In the input field 32 of the first screen 21a, a numerical value indicating the speed until the screw 330 that starts the operation reaches the position of the input field 30 is input. For example, by touching the input field 32, a numeric keypad is displayed, and an arbitrary value can be input using the numeric keypad.

[0145] The numerical value indicating the speed of the screw 330 from the position of the input field 30 to the position of the input field 31 (V / P switching position) is input in the input field 33 of the first screen 21a. For example, by touching the input field 33 to display a numeric keypad, an arbitrary value can be input using the numeric keypad.

[0146] In addition, when "off" is input in the input field 30 of the first screen 21a, the speed of the input field 32 is invalid, so the screw 330 moves at the speed of the input field 33 from the start of the action to the V / P switching position. In addition, when a position is input in the input field 30 of the first screen 21a, the speed of the input field 32 is effective, so the screw 330 moves at the speed of the input field 32 from the start of the action to the position of the input field 30, and moves at the speed of the input field 33 from the position of the input field 30 to the position of the input field 31 (V / P switching position).

[0147] The upper limit value of the pressure detected by the pressure detector 360 is input in the input field 34 of the first screen 21a. When the pressure detected by the pressure detector 360 exceeds the pressure in the input field 34, the control device 700 controls the speed of the screw 330 regardless of the speed of the input fields 32, 33, etc., so that the pressure detected by the pressure detector 360 does not exceed the pressure in the input field 34.

[0148] (Second Screen 21b of Condition Display Section 21)

[0149] The second screen 21b of the condition display unit 21 is a screen for inputting setting conditions during the pressure holding process. A plurality of input fields 40 to 43 are provided on the second screen 21b. The pressure holding process is a driving process. Figure 1 The injection motor 350 shown pushes the screw 330 forward, keeps the pressure of the molding material at the front end of the screw 330 (holding pressure) at a set pressure, and pushes the molding material remaining in the cylinder 310 toward the mold device 800. In the holding pressure step, the injection motor 350 is driven to push the screw 330 forward, keeps the pressure of the molding material at the front end of the screw 330 at a set pressure, and pushes the molding material remaining in the cylinder 310 toward the mold device 800. The insufficient amount of molding material caused by cooling shrinkage in the mold device 800 can be supplemented.

[0150] A numerical value indicating time is input in the input field 40 of the second screen 21b. Specifically, the time for maintaining the pressure input in the input field 42 after the V / P switching is performed is input in the input field 40. For example, by touching the input field 40, a numeric keypad is displayed, and an arbitrary value can be input using the numeric keypad.

[0151] A numerical value indicating time is input in the input field 41 of the second screen 21b. Specifically, the time for maintaining the pressure input in the input field 43 after the time input in the input field 40 has elapsed is input in the input field 41. For example, by touching the input field 41, a numeric keypad is displayed, and an arbitrary value can be input using the numeric keypad.

[0152] When the pressure does not need to be changed, that is, when the pressure in the input field 42 is maintained for a time corresponding to the time in the input field 40, a word such as "Close" indicating that the pressure is not to be changed is input in the input field 41. When inputting a word such as "Close", for example, the word "Close" displayed in a pop-up manner can be selected by touching the input field 41.

[0153] (Third Screen 21c of Condition Display Section 21)

[0154] The third screen 21 c of the condition display unit 21 is provided with a V / P switching mode selection field 50 and an input field 51 .

[0155] The V / P switching mode selection bar 50 of the third screen 21c is a screen for selecting a mode for performing V / P switching. By touching the V / P switching mode selection bar 50, the V / P switching mode selection bar 50 is displayed. Figure 5 A drop-down menu 52 is shown. Figure 5 FIG. 2 is a diagram showing an example of a pull-down menu displayed in the V / P switching mode selection column. Figure 5 As shown, the pull-down menu 52 includes: a position switch button 52a, used to select the position switch mode; a pressure switch button 52b, used to select the pressure switch mode; and an external input button 52c, used to select the external input switch mode.

[0156] The position switching mode is a mode for switching from a filling process based on speed control to a pressure holding process based on pressure control according to the detected position of the screw 330 .

[0157] The pressure switching mode is a mode for switching from a filling process based on speed control to a pressure holding process based on pressure control, and the switching is performed based on the detected pressure rather than the position of the screw 330 .

[0158] The external input switching mode is a mode for performing V / P switching based on a signal from a device provided outside the injection molding machine 10 .

[0159] Back to Figure 4 , a numerical value indicating the pressure for V / P switching is input in the input field 51 of the third screen 21c. For example, by touching the input field 51, a numeric key is displayed, and an arbitrary value can be input using the numeric key. When the detected pressure exceeds the pressure in the input field 51, switching from the filling process to the pressure holding process is performed regardless of the numerical value input in the first screen 21a.

[0160] (Button Display Section 22 of Display Screen 20)

[0161] The button display unit 22 of the display screen 20 displays a retrospective button 751 , a shift button 752 , and a history button 753 .

[0162] The retrospective button 751 is a button for displaying setting conditions set in the past on the condition display unit 21 in a chronologically retrospective direction.

[0163] The shift button 752 is a button for displaying the setting conditions set in the past in a direction of shifting in chronological order on the condition display unit 21 .

[0164] The history button 753 is a button for arranging the setting conditions set in the past as setting history in chronological order and displaying them in a list. Figure 6 The display of the condition setting history displayed when the history button 753 is pressed will be described.

[0165] Figure 6 2 is a diagram showing an example of a history display portion displayed when the history button 753 is pressed. When the history button 753 is pressed, the history button 753 is switched from white to black, for example, and the history display portion 223a is displayed below the history button 753.

[0166] The history display section 223a displays the setting conditions set in the past in a chronological order in a list. The history display section 223a includes items such as "number", "content", "change date and time", "before change", and "after change".

[0167] In the item “Number” of the history display portion 223 a , a serial number indicating the order in which the setting conditions are set is displayed. Figure 6 In the history display section 223a, ascending numbers are assigned from top to bottom. The direction from top to bottom in the history display section 223a is the same as the direction of tracing back in chronological order. The setting condition that the numbers shown in the items displaying "number" in the history display section 223a are "18", "19", "20", "21" in chronological order are the previous ones.

[0168] The item "Content" of the history display unit 223a shows the contents of the set conditions. Figure 4 When the information in the input field 41 of the second screen 21b is displayed, the item "Content" is displayed as "Pressure Holding Time 2nd". Figure 4 When the information of the input field 31 of the first screen 21a is shown, "Filling position V / P switching" is displayed in the item of "Content".

[0169] The item “Change Date and Time” of the history display portion 223 a shows the date and time when the setting condition was changed.

[0170] The item “before change” of the history display portion 223 a shows the value of the setting condition before the date and time shown in the item “date and time of change” was set.

[0171] The item “after change” of the history display portion 223 a shows the value of the setting condition after the date and time shown in the item “date and time of change” is set.

[0172] (Switching action of setting conditions)

[0173] Next, use Figure 7 The operation of switching the setting conditions displayed on the first screen 21a when the trace button 751 or the shift button 752 is pressed will be described. In addition, only the display example of the first screen 21a will be described below, and the display content of the second screen 21b is switched by pressing the trace button 751 or the shift button 752 in the same manner as the first screen 21a.

[0174] Figure 7 2 is a diagram for explaining how the setting conditions displayed on the first screen 21a are switched when the trace button 751 or the shift button 752 is pressed. Figure 7 (A) shows that Figure 7 The setting condition corresponding to the number 19 shown in the figure is the setting condition for changing the date and time setting. Figure 7 (C) and Figure 7 (G) respectively show Figure 7 The setting condition corresponding to the number 20 shown in the figure is the setting condition for changing the date and time setting. Figure 7 (E) shows that Figure 7 The setting condition corresponding to the number 21 shown in the figure is the setting condition for changing the date and time setting. Figure 7 (B) and Figure 7 (D) shows the state where the trace button 751 is pressed. Figure 7 (F) shows the state where the push button 752 is pressed.

[0175] For example, Figure 7 In the first screen 21a shown in (A), the input field 30 is set to 30.00 mm, the input field 31 is set to 6.00 mm, the input field 32 is set to 60.0 mm / s, the input field 33 is set to 25.00 mm / s, and the input field 34 is set to 100 MPa.

[0176] show Figure 7 (A) In the first screen 21a, if Figure 7 When the trace button 751 is pressed as shown in (B), the display content of the first screen 21a is switched to the setting conditions that are earlier in chronological order. Figure 7As a result, the value of the input field 31 of the first screen 21a is as follows: Figure 7 (C) shows a change to 5.00mm.

[0177] show Figure 7 (C) In the first screen 21a shown, if Figure 7 When the trace button 751 is pressed as shown in (D), the display content of the first screen 21a is switched to the setting conditions that are earlier in chronological order. Figure 7 As a result, the value of the input field 31 of the first screen 21a is as follows: Figure 7 (E) shows a change to 7.00mm.

[0178] show Figure 7 (E) When the first screen 21a is shown, if Figure 7 (F) As shown in FIG. 1 , when the shift button 752 is pressed, the display content of the first screen 21a is switched to the setting condition that is later in chronological order. Figure 7 As a result, the value of the input field 31 of the first screen 21a is as follows: Figure 7 (G) shows a change to 5.00mm.

[0179] In addition, each time a condition button (the trace button 751 and the shift button 752) displayed on the button display unit 22 is pressed, the condition button display processing unit 727 may perform the following operations: Figure 7 As shown, the display control of switching to the setting conditions on the first screen 21a can be performed. For example, the setting conditions before the tracing back button 751 is pressed once and the setting conditions after the tracing back button 751 is pressed once can be displayed on the first screen 21a at the same time.

[0180] Figure 8 Flowchart of the switching process of setting conditions. The control device 700 determines whether the retroactive button 751 is pressed in step S1. When the retroactive button 751 is pressed (step S1, "yes"), the control device 700 switches to a setting condition that is chronologically earlier than the currently displayed setting condition (step S2). Figure 7 (C) If the trace button 751 is pressed, the Figure 7 (E) The setting conditions shown.

[0181] In step S1 , when a button other than the trace button 751 is pressed (step S1 , No), the control device 700 determines that the shift button 752 or the history button 753 is pressed, and executes the process of step S3 .

[0182] When the shift button 752 is pressed (step S3, "yes"), the control device 700 switches to a setting condition that is later in time sequence than the setting condition currently displayed (step S4). Figure 7 (E) When the setting condition is set, if the push button 752 is pressed, the Figure 7 (G) shows the setting conditions.

[0183] When a button other than the shift button 752 is pressed (step S3, No), the control device 700 determines that the history button 753 is pressed, and displays the history display section 223a (step S5).

[0184] As described above, according to the control device 700 involved in the present embodiment, after changing the molding conditions (setting conditions) for controlling the operation of the injection molding machine 10 by using the first screen 21a, the second screen 21b, the third screen 21c, etc., when the same molding conditions as those set in the past are reused, the operator can switch the currently set molding conditions to the molding conditions set in the past by simply pressing the retroactive button 751, etc. without operating the first screen 21a, the second screen 21b, the third screen 21c, etc. Therefore, according to the control device 700 involved in the present embodiment, the labor and time of resetting the molding conditions by using the first screen 21a, the second screen 21b, the third screen 21c, etc. can be saved, and the working time for setting the molding conditions can be shortened, and input errors can be suppressed.

[0185] In particular, in order to mold qualified products by injection molding, it is necessary to gradually change the molding conditions until qualified products are molded. In such a molding condition change work, for example, sometimes the molding conditions set in the past are restored, and the molding conditions are further fine-tuned from that molding condition, so the adjustment of the molding conditions takes a long time. In the past, in order to restore the molding conditions set in the past, the operator was required to confirm the setting history record and remember the molding conditions recorded therein to input the molding conditions into the condition display unit 21. In contrast, according to the control device 700 involved in this embodiment, the molding conditions set in the past can be immediately called up and displayed by simply pressing the traceback button 751, so that not only can the operator save the labor and time of confirming the setting history record, etc., but also the time for fine-tuning the molding conditions is greatly shortened, thereby reducing the production cost of the molded product.

[0186] Fig. 9 FIG. 2 is a diagram showing a second example of a screen displayed on a display device provided in an injection molding machine according to an embodiment. Fig. 9 The condition display unit 21 of the display screen 20 displays the fourth screen 21d instead of the first to third screens 21a to 21c.

[0187] Fig. 9 The fourth screen 21d is a screen for displaying setting conditions for managing molding quality, i.e., management items. The management items in the fourth screen 21d display data used for managing the molding operation of the injection molding machine 10. The data is detected at specific intervals by various sensors provided in the injection molding machine 10, and the management items in the fourth screen 21d display the data in numerical values ​​in chronological order.

[0188] The fourth screen 21d displays an item indicating the number of injections, an item indicating the time when injection is performed, and a plurality of management items. "Injection" is a series of actions for obtaining a molded product, such as the actions from the start of a metering process to the start of the next metering process. "Management items" are items for displaying data used in the management of the molding action of the injection molding machine 10. Fig. 9 The management items of the fourth screen 21d shown display cycle time, filling time, and weighing time as examples.

[0189] The cycle time is the time required for one injection, for example, the time from the nth (n is a natural number greater than or equal to 1) mold closing step to the n+1th mold closing step.

[0190] The filling time is the time of the filling process and is equal to the time from the time when the screw 330 starts to move forward at the set moving speed by the injection motor 350 to the time when the screw 330 reaches the V / P switching position.

[0191] The metering time is the time of the metering process. The metering time is equal to the time from the moment when the screw 330 is driven by the metering motor 340 and rotates at a set speed to start conveying the molding material forward along the spiral groove of the screw 330 to the moment when the molding material is conveyed to the front of the screw 330 and accumulated in the front part of the cylinder 310, and the screw 330 retreats, thereby accumulating a predetermined amount of molding material in front of the screw 330.

[0192] The top-to-bottom direction in the fourth screen 21d is the same as the chronological direction. The fourth screen 21d displays data with numbers indicating the number of shots being "20", "19", and "18" in the order of chronological order.

[0193] like Fig. 9 As shown in FIG. 21 , in order to display management items such as cycle time, filling time, and metering time on the fourth screen 21 d, it is necessary to select the desired management items in advance. Fig.10 An example of a management item selected by an operator will be described.

[0194] Fig.102 is a diagram showing an example of a management item selection screen 70. The management item selection screen 70 is displayed on the display screen 20. On the management item selection screen 70, six management items 71 to 76 are displayed as an example of a management item group to be selected. The six management items 71 to 76 are buttons that can be touched. The number and type of management item groups are not limited to this.

[0195] The management item 71 is a button for displaying the cycle time on the fourth screen 21 d as data used for management of the molding operation of the injection molding machine 10 .

[0196] The management item 72 is a button for displaying the filling time on the fourth screen 21 d as data used for management of the molding operation of the injection molding machine 10 .

[0197] The management item 73 is a button for displaying the metering time on the fourth screen 21d as data used for management of the molding operation of the injection molding machine 10. The metering time is the time of the metering process.

[0198] The management item 74 is a button for displaying the filling peak pressure on the fourth screen 21d as data used for management of the molding operation of the injection molding machine 10. The filling peak pressure is the maximum pressure in the filling process.

[0199] The management item 75 is a button for displaying the minimum cushion position on the fourth screen 21d as data used for management of the molding operation of the injection molding machine 10. The minimum cushion position is the position where the screw 330 moves to the bottom in the injection process.

[0200] The management item 76 is a button for displaying the pressure holding end position on the fourth screen 21d as data used for managing the molding operation of the injection molding machine 10. The pressure holding end position is a value obtained during the pressure holding process, for example, after Figure 4 The position of the screw 330 at the time indicated in the input column 40 or the input column 41 .

[0201] When, for example, management item 71 , management item 72 , and management item 73 are pressed from among the six management items 71 to 76 displayed on management item selection screen 70 , management item 71 , management item 72 , and management item 73 are switched from being displayed in white to being displayed in black, for example.

[0202] After that, if a save button (not shown) displayed on the display screen 20 is pressed, the control device 700 stores the selected management items 71, 72, and 73 as a management item group displayed on the fourth screen 21d. At this time, the control device 700 stores the time when the save button is pressed in association with the management item group.

[0203] In this way, by using the management item selection screen 70, the operator can arbitrarily change the management item group displayed on the fourth screen 21d.

[0204] To display the management item groups set at different times in a chronological order, just press the history button 753. Fig.11 An example of a list display of a management item group displayed when the history button 753 is pressed will be described.

[0205] Fig.11 1 is a diagram showing an example of the setting history of the management item displayed when the history button is pressed. When the history button 753 is pressed, the history button 753 is switched from white to black, for example, and the history display section 223b is displayed below the history button 753.

[0206] The item “Number” of the history display portion 223 b displays a serial number indicating the order in which the management items are set. Fig.11 In the history display section 223b, ascending numbers are assigned from top to bottom. The direction from top to bottom in the history display section 223b is the same as the direction of tracing back in chronological order. The numbers shown in the items displayed as "numbers" in the history display section 223b are the setting conditions (management items) that are preceding in chronological order in the order of "18", "19", "20", and "21".

[0207] The item "Content" of the history display unit 223b shows the content of the set management item. The content of the management item may be indicated as long as the type of the set management item and the number of management items are recognizable, and for example, the first letters of the selected management items may be displayed in a row.

[0208] The item “Change Date and Time” of the history display unit 223 b shows the date and time when the change of the management item was performed.

[0209] (Switch actions for managing projects)

[0210] Next, use Fig.12 The operation in which the management item displayed on the fourth screen 21 d is switched when the trace back button 751 or the shift button 752 is pressed will be described.

[0211] Fig.12 This is a diagram for explaining how the management items displayed on the fourth screen 21d are switched when the trace button 751 or the shift button 752 is pressed. Fig.12 The fourth screen 21d of (A) displays the cycle time and the filling time as management items. Fig.12 (C) and Fig.12(G) displays the cycle time, filling time and metering time as management items. Fig.12 (E) displays cycle time and metering time as management items. Fig.12 (B) and Fig.12 (D) shows the state where the trace button 751 is pressed. Fig.12 (F) shows the state where the push button 752 is pressed.

[0212] conduct Fig.12 When the fourth screen 21d shown in (A) is displayed, if Fig.12 (B) When the trace button 751 is pressed, the display content of the fourth screen 21d is switched to the management items that are previously in chronological order. Fig.12 (C) Management items shown.

[0213] conduct Fig.12 When the fourth screen 21d shown in (C) is displayed, if Fig.12 (D) As shown in FIG. 14 , when the trace button 751 is pressed, the display content of the fourth screen 21d is switched to the management items that are previously in chronological order. Fig.12 (E) Management items shown.

[0214] conduct Fig.12 When the fourth screen 21d shown in (E) is displayed, if Fig.12 (F) As shown in FIG. 14 , if the shift button 752 is pressed, the display content of the fourth screen 21d is switched to the management item that is later in chronological order. Fig.12 (G) Management items shown.

[0215] In addition, each time a condition button (retrospective button 751, shift button 752) displayed on the button display unit 22 is pressed, the condition button display processing unit 727 may perform the following operations: Fig.12 As shown, the display control of switching to the setting conditions (management items) on the fourth screen 21d can be performed. For example, the setting conditions (management items) before the tracing back button 751 is pressed once and the setting conditions (management items) after the tracing back button 751 is pressed once can be displayed on the fourth screen 21d at the same time.

[0216] Fig.13 Flowchart of the switching process of management items. The control device 700 determines whether the tracing button 751 is pressed in step S11. When the tracing button 751 is pressed (step S11, "yes"), the control device 700 switches to a management item that is chronologically earlier than the currently displayed management item (step S12). For example, Fig.12(C) When the trace button 751 is pressed, the Fig.12 (E) Management items shown.

[0217] In step S11 , when a button other than the trace button 751 is pressed (step S11 , No), the control device 700 determines that the shift button 752 or the history button 753 is pressed, and executes the process of step S13 .

[0218] When the shift button 752 is pressed (step S13, "Yes"), the control device 700 switches to a management item that is later in time order than the currently displayed management item (step S14). Fig.12 (E) When the push button 752 is pressed, the management item is switched to Fig.12 (G) Management items shown.

[0219] When a button other than the shift button 752 is pressed (step S13, No), the control device 700 determines that the history button 753 is pressed, and displays the history display section 223b (step S15).

[0220] As described above, according to the control device 700 involved in the present embodiment, after changing the type and number of management items using the management item selection screen 70, when reusing the same management items as those set in the past, the operator can display the same management items as those set in the past by simply pressing the trace button 751, etc., without changing the type and number of management items using the management item selection screen 70. Therefore, according to the control device 700 involved in the present embodiment, it is possible to save the labor and time of re-changing the type and number of management items using the management item selection screen 70, thereby shortening the working time associated with the change of the type and number of management items, and suppressing input errors.

[0221] Fig.14 FIG. 3 is a diagram showing a third example of a screen displayed on a display device provided in an injection molding machine according to an embodiment. Fig.14 The condition display section 21 of the display screen 20 displays the waveform display screen 80, the waveform selection bar 60, the vertical axis upper limit value input bar 61, the vertical axis lower limit value input bar 62, the waveform number selection bar 63 and the waveform color selection bar 64 instead of the first screen 21a to the fourth screen 21d.

[0222] Fig.14The waveform display screen 80 is a screen for displaying setting conditions for managing molding quality, that is, management items (waveforms). The waveform is data used in the management of the molding operation of the injection molding machine 10. The data is data detected discontinuously or continuously by various sensors provided in the injection molding machine 10, and the waveform display screen 80 displays the data as a waveform that is continuous in chronological order.

[0223] The waveform selected in the waveform selection column 60 is displayed on the waveform display screen 80. For example, the waveform display screen 80 shows the detection result of the connecting rod strain detector 141 for detecting the strain of the connecting rod 140 as a waveform that is continuous in time sequence, the detection result of the pressure detector 360 during the pressure holding process as a waveform that is continuous in time sequence, and the detection result of the injection motor encoder 351 for detecting the screw position as a waveform that is continuous in time sequence.

[0224] The waveform selection field 60 is a screen for selecting an arbitrary waveform from a plurality of waveforms when the detection results detected by various sensors provided in the injection molding machine 10 are displayed as waveforms that are continuous in time order.

[0225] The vertical axis upper limit value input field 61 is a screen for setting the upper limit value of the vertical axis of the waveform display screen 80. For example, by touching the vertical axis upper limit value input field 61, a numeric keypad is displayed, and an arbitrary value can be input using the numeric keypad.

[0226] The vertical axis lower limit value input field 62 is a screen for setting the lower limit value of the vertical axis of the waveform display screen 80. For example, by touching the vertical axis lower limit value input field 62, a numeric keypad is displayed, and an arbitrary value can be input using the numeric keypad.

[0227] The waveform number selection field 63 is a screen for selecting a number (ch1, ch2, ch3, etc.) to be assigned to the selected waveform in order to identify the type of the waveform selected by the waveform selection field 60.

[0228] The waveform color selection field 64 is a screen for selecting a color (blue, yellow, red, etc.) to be given to the selected waveform in order to identify the type of the waveform selected by the waveform selection field 60 .

[0229] Fig.15 This is a diagram for explaining a specific example of information selected using the waveform selection field 60, the waveform number selection field 63, and the waveform color selection field 64. Fig.15 The waveform selection bar 60 shown in (A) shows Fig.15 (B) shows a pull-down menu 60a.

[0230] The pull-down menu 60a includes, for example, an item "Mold clamping force detection" for displaying the detection result of the connecting rod strain detector 141 for detecting the strain of the connecting rod 140 as a waveform that is continuous in time sequence, an item "Screw position detection" for displaying the detection result of the injection motor encoder 351 for detecting the screw position as a waveform that is continuous in time sequence, and an item "Pressure holding detection" for displaying the detection result of the pressure detector 360 during the pressure holding process as a waveform that is continuous in time sequence. The item selected from these items is displayed in the waveform selection column 60.

[0231] By touch operation Fig.15 The waveform color selection bar 64 shown in (A) shows Fig.15 (C) shows the pull-down menu 64a.

[0232] The pull-down menu 64a includes items ("blue", "yellow", "red", etc.) indicating the color to be given to the waveform selected by the waveform selection field 60. The color of the item selected from these items is given to the waveform selected by the waveform selection field 60.

[0233] By touch operation Fig.15 The waveform number selection bar 63 shown in (A) shows Fig.15 (D) Pull-down menu 63a shown. Pull-down menu 63a includes items ("ch1", "ch2", "ch3", etc.) indicating the number assigned to the waveform selected by waveform selection field 60. The number of the item selected from these items is assigned to the waveform selected by waveform selection field 60.

[0234] After the type of waveform, color of the waveform, number of the waveform, etc. are set in this way, if a save button (not shown) displayed on the display screen 20 is pressed, the control device 700 stores the set type of waveform, color of the waveform, and number of the waveform as a waveform group displayed on the waveform display screen 80. At this time, the control device 700 associates the time when the save button is pressed with the waveform group and stores them.

[0235] In this way, the operator can arbitrarily change the waveform group displayed on the waveform display screen 80 using the waveform selection field 60 , the vertical axis upper limit value input field 61 , the vertical axis lower limit value input field 62 , the waveform number selection field 63 , and the waveform color selection field 64 .

[0236] To display the waveform groups set at different times in a chronological order, just press the history button 753. Fig.16 An example of a list display of waveform groups displayed when the history button 753 is pressed will be described.

[0237] Fig.16This is a diagram showing an example of the setting history of the waveform displayed when the history button is pressed. When the history button 753 is pressed, the history button 753 is switched from white to black, for example, and the history display section 223 c is displayed below the history button 753 .

[0238] In the item "Number" of the history display part 223c, a serial number indicating the order in which the management items are set is displayed. Fig.16 In the history display section 223c, ascending numbers are assigned from top to bottom. The direction from top to bottom in the history display section 223c is the same as the direction of tracing back in chronological order. The numbers shown in the items displaying "number" in the history display section 223c are the setting conditions (waveforms) that are preceding in chronological order in the order of "18", "19", "20", and "21".

[0239] The item "Content" of the history display portion 223c shows the content of the set waveform. The content of the management item may be marked as long as the type of waveform, the number of waveforms, etc. can be identified, and for example, the first letters of the selected waveforms may be displayed in a row.

[0240] The item “Change Date and Time” of the history display unit 223 c shows the date and time when the change of the management item was performed.

[0241] (Switch actions for managing projects)

[0242] Next, use Fig.17 The operation of switching the waveform displayed on the waveform display screen 80 when the traceback button 751 or the shift button 752 is pressed will be described.

[0243] Fig.17 751 or 752 is a diagram for explaining how the waveform displayed on the waveform display screen 80 is switched when the trace button 751 or the shift button 752 is pressed. Fig.17 The waveform display screen 80 of (A) displays the waveform of "pressure holding detection" and the waveform of "screw position detection". Fig.17 (C) and Fig.17 (G) shows the waveform of "holding pressure detection" and the waveform of "mold clamping force detection" respectively. Fig.17 (E) Displays the waveform of "Mold clamping force detection" and the waveform of "Screw position detection". Fig.17 (B) and Fig.17 (D) shows the state where the trace button 751 is pressed. Fig.17 (F) shows the state where the push button 752 is pressed.

[0244] show Fig.17 When the waveform shown in (A) is displayed at 80, if Fig.17(B) As shown in FIG. 1 , when the traceback button 751 is pressed, the display content of the waveform display screen 80 is switched to the waveform that is earlier in chronological order. Fig.17 (C) The waveform shown.

[0245] show Fig.17 (C) When the waveform display screen 80 is shown, if Fig.17 (D) As shown in FIG. 1 , when the traceback button 751 is pressed, the display content of the waveform display screen 80 is switched to the waveform that is earlier in chronological order. Fig.17 (E) The waveform shown.

[0246] show Fig.17 (E) When the waveform display screen is 80, if Fig.17 (F) As shown in FIG. 1 , when the shift button 752 is pressed, the display content of the waveform display screen 80 is switched to the waveform that is later in chronological order. Fig.17 (G) The waveform shown.

[0247] Fig.18 Flowchart of waveform switching processing. The control device 700 determines whether the traceback button 751 is pressed in step S21. When the traceback button 751 is pressed (step S21, "yes"), the control device 700 switches to a waveform that is chronologically earlier than the currently displayed waveform (step S22). For example, Fig.17 (C) If the trace button 751 is pressed, the waveform will be switched to Fig.17 (E) The waveform shown.

[0248] In step S21 , when a button other than the trace button 751 is pressed (step S21 , No), the control device 700 determines that the shift button 752 or the history button 753 is pressed, and executes the process of step S23 .

[0249] When the shift button 752 is pressed (step S23, "Yes"), the control device 700 switches to a waveform that is later in time sequence than the currently displayed waveform (step S24). Fig.17 (E) When the slide button 752 is pressed, the waveform is switched to Fig.17 (G) The waveform shown.

[0250] When a button other than the shift button 752 is pressed (step S23, No), the control device 700 determines that the history button 753 is pressed, and displays the history display section 223c (step S25).

[0251] In addition, each time a condition button (the trace button 751 and the shift button 752) displayed on the button display unit 22 is pressed, the condition button display processing unit 727 may perform the following operations: Fig.17 As shown, the display control of the setting conditions (waveform) on the waveform display screen 80 is switched. For example, the setting conditions (waveform) before the tracing back button 751 is pressed once and the setting conditions (waveform) after the tracing back button 751 is pressed once can be displayed on the waveform display screen 80 at the same time.

[0252] As described above, according to the control device 700 of the present embodiment, after changing the type and number of waveforms for the management of the operation of the injection molding machine 10 by using the waveform selection bar 60, the vertical axis upper limit value input bar 61, the vertical axis lower limit value input bar 62, the waveform number selection bar 63, and the waveform color selection bar 64, when the same waveform as the waveform set in the past is reused, the operator can display the same waveform as the waveform set in the past by simply pressing the traceback button 751 without operating the waveform selection bar 60, the vertical axis upper limit value input bar 61, the vertical axis lower limit value input bar 62, the waveform number selection bar 63, and the waveform color selection bar 64. Therefore, according to the control device 700 of the present embodiment, the labor and time of changing the type and number of waveforms by using the waveform selection bar 60, the vertical axis upper limit value input bar 61, the vertical axis lower limit value input bar 62, the waveform number selection bar 63, and the waveform color selection bar 64 can be saved, and the work time of changing the type and number of waveforms can be shortened, and input errors can be suppressed.

[0253] The condition button display processing unit of the control device 700 according to the present embodiment may be configured to display a tracing button 751 for displaying the setting conditions set in the past in a chronological direction on the display screen. With this configuration, the setting conditions currently set can be switched to the setting conditions set in the past by simply pressing the tracing button 751, and the labor and time of resetting the setting conditions using the waveform selection bar 60, the first screen 21a, the second screen 21b, the third screen 21c, etc. can be saved, thereby shortening the working time for setting the setting conditions and suppressing input errors.

[0254] The condition button display processing unit of the control device 700 according to the present embodiment may be configured to display a shift button 752 on the display screen for displaying the setting conditions set in the past in a time-shifting direction. With this configuration, by simply pressing the shift button 752, the setting conditions set in a time-shifting direction from the position of the setting conditions displayed after pressing the retroactive button 751 can be displayed. Therefore, when fine-tuning the setting conditions, the setting conditions set in the time-shifting direction can be used without manually re-entering the setting conditions, thereby significantly reducing the time required for fine-tuning the setting conditions.

[0255] The history button display processing unit of the control device 700 according to the present embodiment may be configured to display a history button for displaying the history of the setting conditions set in the past on the display screen. With this configuration, the history of the setting conditions can be displayed in a list by simply pressing the history button 753, so that, for example, the setting conditions desired by the operator can be easily searched from the history list, thereby shortening the time for fine-tuning the setting conditions.

[0256] The control device 700 according to the present embodiment may be configured to include a setting condition display unit that displays the stored history of the setting condition on a display screen and displays the setting condition in the displayed history when a condition button (the tracing button 751 or the shift button 752) is pressed. With this configuration, the setting condition desired by the operator can be displayed on the condition display unit 21 from the history screen, thereby saving the labor and time of manually re-entering the setting condition.

[0257] The control device 700 according to the present embodiment may be configured to include a history record adding unit for adding the setting conditions of the injection molding to the history record when the injection molding is performed. With this configuration, the history record does not include setting conditions that are not reflected in the operation of the injection molding machine but are only displayed, and thus only setting conditions used for adjustment of the molding can be left as the history record. Therefore, compared with the case where all the displayed setting conditions are added as the history record, only the setting conditions used for adjustment of the molding can be easily searched.

[0258] In addition, the above-mentioned history record adding unit can be configured to have a history record selection function (history record selection unit). The history record selection unit is configured, for example, to be able to select whether to add the setting conditions of the injection molding when the injection molding is performed to the history record or to add the setting conditions that are not reflected in the action of the injection molding machine but are only displayed to the history record. For example, the first history record adding button and the second history record adding button are first displayed on the display screen of the display device, and the operator presses any one of these buttons, whereby the history record adding unit performs the history record adding action corresponding to the pressed button when detecting that the first history record adding button or the second history record adding button is pressed. The first history record adding button is a button for adding the setting conditions of the injection molding when the injection molding is performed to the history record. The second history record adding button is a button for adding the setting conditions that are not reflected in the action of the injection molding machine but are only displayed to the history record. Thus, by providing a history record selection function (history record selection unit), for example, the operator can arbitrarily select whether to keep only the setting conditions used for molding adjustment as history records or to add all displayed setting conditions as history records, thereby flexibly responding to the operator's needs.

[0259] The above-mentioned history adding section can be configured to add the setting conditions of injection molding to the history when the retro button 751 is pressed. With this configuration, the setting conditions reflected in the operation of the injection molding machine when the push button 752 is pressed are not included in the history, and the setting conditions when the retro button 751 is pressed with high frequency of use can be left as the history. Therefore, compared with the case where all the displayed setting conditions are added as the history, only the setting conditions used for adjustment of molding can be easily searched.

[0260] The control device 700 of this embodiment can be configured to include a molding quality result display unit that establishes a corresponding association between the quality result of the injection molding and the setting conditions of the injection molding when performing injection molding. With this structure, it is easy to distinguish only the setting conditions when a qualified product is obtained through injection molding among the setting conditions reflected in the operation of the injection molding machine, so that the operator can easily obtain a qualified product through another injection molding by using the setting conditions.

[0261] The history display processing unit 723 of the control device 700 according to the present embodiment may be configured to display the history of the setting conditions of the injection molding machine set in the past on the display screen for displaying the setting conditions. With this configuration, the operator can fine-tune the setting conditions while confirming the history displayed on the same screen as the screen displayed by the condition display unit 21, without switching the screen for displaying the condition display unit 21 and the screen for displaying the history, thereby shortening the work time for changing the setting conditions.

[0262] In addition, in the history list, the setting conditions displayed each time the trace button 751 or the shift button 752 is pressed may be added as history information, or only the setting conditions reflected in the operation of the injection molding machine, for example, among the setting conditions displayed each time the trace button 751 or the shift button 752 is pressed may be added as history information. When the setting conditions displayed each time the trace button 751 or the shift button 752 is pressed are added as history information, the latest setting conditions added become the latest setting conditions in chronological order. Among the setting conditions displayed each time the trace button 751 or the shift button 752 is pressed, the setting conditions reflected in the operation of the injection molding machine become the latest setting conditions in chronological order.

[0263] Although embodiments of the control device and injection molding machine have been described above, the present invention is not limited to the above embodiments, and various modifications and improvements can be made within the scope of the gist of the present invention described in the claims.

Claims

1. A display device for inputting and displaying setting conditions of an injection molding machine, characterized in that: have: An input unit for inputting setting conditions of the injection molding machine; a condition display unit that displays the setting condition input through the input unit as the setting condition for causing the injection molding machine to perform a molding operation; as well as A traceback button is used to display the setting conditions set in the past in a chronological direction; When the condition display unit displays the setting conditions for causing the injection molding machine to perform a molding operation, if a traceback button is pressed, the setting conditions for causing the injection molding machine to perform a molding operation on the condition display unit are traced back and displayed; The display device can instantly call up and display the setting conditions set in the past by simply pressing the retroactive button, thereby switching the setting conditions currently set to the setting conditions set in the past.

2. The display device according to claim 1, wherein: The input unit is configured as an input field for inputting a set value or is configured to display a pull-down menu.

3. The display device according to claim 1 or 2, wherein: The input unit and the traceback button are formed of a touch panel and are displayed on the display device simultaneously with the condition display unit.

Images