Production management device

Abstract

To facilitate grasping the state on production of a product.SOLUTION: A production management device relating to one embodiment includes a control part constituted so as to: on production of a plurality of products from a material by using a production apparatus, display a detection result detected by a detection part on production process of the product on a display part; and if receiving the detection result or an information for identifying the product, display the detection result of a first product identified by the information in which the detection result of receiving the selection has been detected or the selection has received, as well as to display the detection result of a second product produced by the production apparatus one step before the first product, and display the detection result of a third product produced by the production apparatus one step after the first product on the display part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a production management device. [Background technology]

[0002] In recent years, production equipment is configured to display the results of detection by various sensors while a product is being produced, so that the production status can be understood. For example, a technique has been proposed in which the performance values ​​for each shot of an injection molding machine are displayed as logging data showing the past history, and statistical data based on the logging data is also displayed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-202855 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, even when statistical data is displayed, there is a problem that it is difficult for an operator to understand the circumstances under which a product in which a value (e.g., a maximum or minimum value) contained in the statistical data is detected was produced.

[0005] One aspect of the present invention provides a technology that makes it easy to understand the situation during production of a product by displaying, when detection results for a product identified based on a received operation, also displaying detection results for products produced before and after the product. [Means for solving the problem]

[0006] A production management device according to one embodiment of the present invention includes a control unit configured to display, on a display unit, detection results detected by a detection unit during the process of producing multiple products from materials using a production device, and when a selection of the detection result or information identifying the products is accepted, to display, on the display unit, the detection result of a first product detected by the detection result selected or identified by the information selected, as well as the detection result of a second product produced by the production device just before the first product, and the detection result of a third product produced by the production device just after the first product. Effect of the Invention

[0007] According to one aspect of the present invention, a technology is provided that makes it easy to understand the situation during product production by displaying detection results for a product identified based on a received operation along with detection results for products produced before and after the product. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a state when mold opening of an injection molding machine according to an embodiment is completed. [Diagram 2] FIG. 2 is a diagram showing a state during mold clamping of the injection molding machine according to one embodiment. [Diagram 3] FIG. 3 is a functional block diagram showing components of the control device for the injection molding machine according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating a log information screen output by the display control unit according to the first embodiment. [Diagram 5] FIG. 5 is a diagram showing an example of a change in the screen when a selection of a maximum value in a setting field of a statistics list on a log information screen according to the first embodiment is accepted. [Figure 6] FIG. 6 is a diagram illustrating a log information screen output by a display control unit according to a modified example of the first embodiment. [Figure 7]FIG. 7 is a diagram showing an example of a change in the screen when an operation to sort by CH5 is accepted in the result list on the log information screen according to the second embodiment. [Figure 8] FIG. 8 is a diagram showing an example of a change in the screen when an operation for filtering in CH5 is received in the result list on the log information screen according to the modified example of the second embodiment. [Figure 9] FIG. 9 is a diagram illustrating a log information screen output by a display control unit according to the third embodiment. [Figure 10] FIG. 10 is a diagram illustrating a log information screen output by a display control unit according to a modified example of the third embodiment. [Figure 11] FIG. 11 is a diagram illustrating a block configuration of an injection molding machine and a management device according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiment described below is an example, not a limitation of the invention, and all features and combinations described in the embodiment are not necessarily essential to the invention. In addition, the same or corresponding components in each drawing are denoted by the same or corresponding reference numerals, and the description may be omitted.

[0010] FIG. 1 is a diagram showing a state of the injection molding machine according to the first embodiment when mold opening is completed. FIG. 2 is a diagram showing a state of the injection molding machine according to the first embodiment when mold clamping is performed. In this specification, the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. The X-axis direction and the Y-axis direction represent the horizontal direction, and the Z-axis direction represents the vertical direction. When the mold clamping device 100 is of a horizontal type, the X-axis direction is the mold opening / 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 anti-operation side.

[0011] As shown in FIG. 1 and FIG. 2, the injection molding machine 10 includes a mold clamping device 100 that opens and closes a mold device 800, an ejector device 200 that ejects a molded product molded by the mold device 800, an injection device 300 that injects a molding material into the mold device 800, a moving device 400 that moves the injection device 300 forward and backward relative to the mold device 800, a control device 700 that controls each component of the injection molding machine 10, and a frame 900 that supports each component of the injection molding machine 10. The frame 900 includes a mold clamping device frame 910 that supports the mold clamping device 100, and an injection device frame 920 that supports the injection device 300. The mold clamping device frame 910 and the injection device frame 920 are each installed on the floor 2 via a leveling adjuster 930. The control device 700 is disposed in the internal space of the injection device frame 920. Hereinafter, each component of the injection molding machine 10 will be described.

[0012] (mold clamping device) In the description of the clamping unit 100, the moving direction of the movable platen 120 during mold closing (for example, the positive direction of the X-axis) is the front, and the moving direction of the movable platen 120 during mold opening (for example, the negative direction of the X-axis) is the rear.

[0013] The mold clamping device 100 performs mold closing, pressurization, mold clamping, depressurization, and mold opening of the mold device 800. The mold device 800 includes a fixed mold 810 and a movable mold 820. The mold clamping device 100 is, for example, a horizontal type, and the mold opening and closing direction is horizontal. The mold clamping device 100 has a fixed platen 110 to which the fixed mold 810 is attached, a movable platen 120 to which the movable mold 820 is attached, and a movement mechanism 102 that moves the movable platen 120 in the mold opening and closing direction relative to the fixed platen 110.

[0014] The stationary platen 110 is fixed to the mold clamping unit frame 910. A stationary mold 810 is attached to the surface of the stationary platen 110 that faces the movable platen 120.

[0015] The movable platen 120 is disposed so as to be movable in the mold opening / closing direction relative to the mold clamping unit frame 910. A guide 101 for guiding the movable platen 120 is disposed on the mold clamping unit frame 910. A movable mold 820 is attached to the surface of the movable platen 120 facing the fixed platen 110.

[0016] The moving mechanism 102 advances and retreats the movable platen 120 relative to the fixed platen 110, thereby performing mold closing, pressurization, mold clamping, depressurization, and mold opening of the mold apparatus 800. The moving mechanism 102 has a toggle support 130 disposed at a distance from the fixed platen 110, a tie bar 140 connecting the fixed platen 110 and the toggle support 130, a toggle mechanism 150 that moves the movable platen 120 in the mold opening and closing direction relative to the toggle support 130, a mold clamping motor 160 that operates the toggle mechanism 150, a motion conversion mechanism 170 that converts the rotational motion of the mold clamping motor 160 into linear motion, and a mold thickness adjustment mechanism 180 that adjusts the distance between the fixed platen 110 and the toggle support 130.

[0017] The toggle support 130 is disposed at a distance from the fixed platen 110, and is placed on the mold clamping unit frame 910 so as to be freely movable in the mold opening and closing direction. The toggle support 130 may be disposed so as to be freely movable along a guide laid on the mold clamping unit frame 910. The guide of the toggle support 130 may be the same as the guide 101 of the movable platen 120.

[0018] In this embodiment, the fixed platen 110 is fixed to the mold clamping unit frame 910, and the toggle support 130 is arranged so as to be freely movable in the mold opening and closing direction relative to the mold clamping unit frame 910, but the toggle support 130 may be fixed to the mold clamping unit frame 910, and the fixed platen 110 may be arranged so as to be freely movable in the mold opening and closing direction relative to the mold clamping unit frame 910.

[0019] The tie bar 140 connects the fixed platen 110 and the toggle support 130 at a distance L in the mold opening / closing direction. A plurality of tie bars 140 (for example, four) may be used. The plurality of tie bars 140 are arranged parallel to the mold opening / closing direction and extend according to the mold clamping force. At least one tie bar 140 may be provided with a tie bar strain detector 141 that detects strain of the tie bar 140. The tie bar strain detector 141 sends a signal indicating the detection result to the control device 700. The detection result of the tie bar strain detector 141 is used for detecting the mold clamping force, etc.

[0020] In this embodiment, the tie bar strain detector 141 is used as the clamping force detector for detecting the clamping force, but the present invention is not limited to this. The clamping force detector is not limited to the strain gauge type, and may be a piezoelectric type, a capacitive type, a hydraulic type, an electromagnetic type, or the like, and the attachment position thereof is also not limited to the tie bar 140.

[0021] The toggle mechanism 150 is disposed between the movable platen 120 and the toggle support 130, and moves the movable platen 120 relative to the toggle support 130 in the mold opening / closing direction. The toggle mechanism 150 has a crosshead 151 that moves in the mold opening / closing direction, and a pair of link groups that bend and stretch with the movement of the crosshead 151. Each of the pair of link groups has a first link 152 and a second link 153 that are connected to bendable and stretchable by a pin or the like. The first link 152 is attached to the movable platen 120 by a pin or the like so as to be swingable. The second link 153 is attached to the toggle support 130 by a pin or the like so as to be swingable. The second link 153 is attached to the crosshead 151 via a third link 154. When the crosshead 151 is advanced or retreated relative to the toggle support 130, the first link 152 and the second link 153 bend and stretch, and the movable platen 120 advances or retreats relative to the toggle support 130.

[0022] The configuration of toggle mechanism 150 is not limited to the configuration shown in Figures 1 and 2. For example, although the number of joints in each link group is five in Figures 1 and 2, it may be four, and one end of third link 154 may be connected to a joint between first link 152 and second link 153.

[0023] The mold clamping motor 160 is attached to the toggle support 130 and operates the toggle mechanism 150. The mold clamping motor 160 advances and retreats the crosshead 151 relative to the toggle support 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 support 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.

[0024] The motion conversion mechanism 170 converts the rotational motion of the mold clamping motor 160 into the linear motion of the crosshead 151. The motion conversion mechanism 170 includes a screw shaft and a screw nut that screws onto the screw shaft. A ball or roller may be interposed between the screw shaft and the screw nut.

[0025] The mold clamping unit 100 performs a mold closing process, a pressure increase process, a mold clamping process, a pressure release process, a mold opening process, and the like under the control of the control device 700.

[0026] In the mold closing process, the mold clamping motor 160 is driven to move the crosshead 151 forward at a set moving speed to a mold closing completion position, thereby moving the movable platen 120 forward and bringing the movable mold 820 into contact with the fixed mold 810. The position and moving speed of the crosshead 151 are detected by using, for example, a mold clamping motor encoder 161. 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.

[0027] The crosshead position detector that detects the position of the crosshead 151 and the crosshead movement speed detector that detects the movement speed of the crosshead 151 are not limited to the mold clamping motor encoder 161, and general devices can be used. Furthermore, the movable platen position detector that detects the position of the movable platen 120 and the movable platen movement speed detector that detects the movement speed of the movable platen 120 are not limited to the mold clamping motor encoder 161, and general devices can be used.

[0028] In the pressure increasing step, the mold clamping motor 160 is further driven to move the crosshead 151 further forward from the mold closing completion position to the mold clamping position, thereby generating a mold clamping force.

[0029] 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 increase process is maintained. In the mold clamping process, a cavity space 801 (see FIG. 2) is formed between the movable mold 820 and the fixed mold 810, and the injection device 300 fills the cavity space 801 with liquid molding material. The filled molding material is solidified to obtain a molded product.

[0030] The number of cavity spaces 801 may be one or more. In the latter case, multiple molded products are obtained at the same time. An insert material may be placed in a part of the cavity space 801, and another part of the cavity space 801 may be filled with a molding material. A molded product in which the insert material and the molding material are integrated is obtained.

[0031] In the depressurization process, the mold clamping motor 160 is driven to move the crosshead 151 back from the mold clamping position to the mold opening start position, thereby moving the movable platen 120 back and reducing the mold clamping force. The mold opening start position and the mold closing completion position may be the same position.

[0032] In the mold opening process, the mold clamping motor 160 is driven to move the crosshead 151 backward at a set moving speed from the mold opening start position to the mold opening completion position, thereby moving the movable platen 120 backward and separating the movable mold 820 from the fixed mold 810. After that, the ejector unit 200 ejects the molded product from the movable mold 820.

[0033] The setting conditions in the mold closing process, the pressure increase process, and the mold clamping process are set together as a series of setting conditions. For example, the moving speed and position of the crosshead 151 in the mold closing process and the pressure increase process (including the mold closing start position, the moving speed switching position, the mold closing completion position, and the mold clamping position) and the mold clamping force are set together as a series of setting conditions. The mold closing start position, the moving speed switching position, the mold closing completion position, and the mold clamping position are arranged in this order from the rear side to the front, and represent the start point and the end point of the section in which the moving speed is set. The moving speed is set for each section. There may be one or more moving speed switching positions. The moving speed switching position does not have to be set. Only one of the mold clamping position and the mold clamping force may be set.

[0034] The setting conditions in the depressurization process and mold opening process are set in the same manner. For example, the movement speed and position of the crosshead 151 in the depressurization process and mold opening process (mold opening start position, movement speed switching position, and mold opening completion position) are set together as a series of setting conditions. The mold opening start position, movement speed switching position, and mold opening completion position are arranged in this order from the front to the rear, and represent the start and end points of the section in which the movement speed is set. The movement speed is set for each section. There may be one or more movement speed switching positions. The movement speed switching position does not have to be set. The mold opening start position and the mold closing completion position may be the same position. Also, the mold opening completion position and the mold closing start position may be the same position.

[0035] Note that the moving speed and position of the movable platen 120 may be set instead of the moving speed and position of the crosshead 151. Moreover, the clamping force may be set instead of the position of the crosshead (e.g., the clamping position) or the position of the movable platen.

[0036] Incidentally, the toggle mechanism 150 amplifies the driving force of the mold clamping motor 160 and transmits it to the movable platen 120. The amplification ratio is also called the toggle ratio. The toggle ratio changes according to the angle θ between the first link 152 and the second link 153 (hereinafter also referred to as the "link angle θ"). The link angle θ is determined from the position of the crosshead 151. When the link angle θ is 180°, the toggle ratio is maximum.

[0037] When the thickness of the mold device 800 changes due to replacement of the mold device 800 or a temperature change of the mold device 800, a mold thickness adjustment is performed so that a predetermined clamping force is obtained during mold clamping. In the mold thickness adjustment, for example, the distance L between the fixed platen 110 and the toggle support 130 is adjusted so that the link angle θ of the toggle mechanism 150 becomes a predetermined angle at the mold touch time when the movable mold 820 touches the fixed mold 810.

[0038] 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 distance L between the fixed platen 110 and the toggle support 130. The mold thickness adjustment is performed, for example, between the end of a molding cycle and 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 tie bar 140, a screw nut 182 held rotatably and immovably on the toggle support 130, and a mold thickness adjustment motor 183 that rotates the screw nut 182 screwed onto the screw shaft 181.

[0039] The screw shaft 181 and the screw nut 182 are provided for each tie bar 140. The rotational driving force of the mold thickness adjustment motor 183 may be transmitted to the multiple screw nuts 182 via a rotational driving force transmission unit 185. The multiple screw nuts 182 can be rotated synchronously. Note that by changing the transmission path of the rotational driving force transmission unit 185, it is also possible to rotate the multiple screw nuts 182 individually.

[0040] The rotational drive force transmission unit 185 is composed of, for example, gears. In this case, a driven gear is formed on the outer periphery of each screw nut 182, a drive gear is attached to the output shaft of the mold thickness adjustment motor 183, and an intermediate gear that meshes with the multiple driven gears and the drive gear is rotatably held in the center of the toggle support 130. Note that the rotational drive force transmission unit 185 may be composed of a belt, a pulley, or the like, instead of gears.

[0041] The operation of the mold thickness adjustment mechanism 180 is controlled by a control device 700. The control device 700 drives the mold thickness adjustment motor 183 to rotate the screw nut 182. As a result, the position of the toggle support 130 relative to the tie bar 140 is adjusted, and the interval L between the fixed platen 110 and the toggle support 130 is adjusted. Note that a plurality of mold thickness adjustment mechanisms may be used in combination.

[0042] The distance L is detected using a mold thickness adjustment motor encoder 184. The mold thickness adjustment motor encoder 184 detects the amount of rotation and the direction of rotation 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 support 130 and the distance L. Note that the toggle support position detector that detects the position of the toggle support 130 and the distance detector that detects the distance L are not limited to the mold thickness adjustment motor encoder 184, and general types can be used.

[0043] The mold clamping apparatus 100 may have a mold temperature regulator that regulates the temperature of the mold apparatus 800. The mold apparatus 800 has a flow path for a temperature control medium therein. The mold temperature regulator regulates the temperature of the mold apparatus 800 by regulating the temperature of the temperature control medium supplied to the flow path of the mold apparatus 800.

[0044] Although the mold clamping apparatus 100 of this embodiment is of a horizontal type in which the mold opening and closing direction is horizontal, it may be of a vertical type in which the mold opening and closing direction is vertical.

[0045] Although the mold clamping apparatus 100 of the present embodiment has a mold clamping motor 160 as a drive source, it may have a hydraulic cylinder instead of the mold clamping motor 160. Also, the mold clamping apparatus 100 may have a linear motor for opening and closing the mold, and an electromagnet for mold clamping.

[0046] (Ejector device) In describing the ejector unit 200, similar to the description of the mold clamping unit 100, the direction of movement of the movable platen 120 during mold closing (e.g., the positive direction of the X-axis) will be referred to as the forward direction, and the direction of movement of the movable platen 120 during mold opening (e.g., the negative direction of the X-axis) will be referred to as the rearward direction.

[0047] The ejector unit 200 is attached to the movable platen 120 and moves forward and backward together with the movable platen 120. The ejector unit 200 has an ejector rod 210 that ejects a molded product from the mold device 800, and a drive mechanism 220 that moves the ejector rod 210 in the movement direction of the movable platen 120 (X-axis direction).

[0048] The ejector rod 210 is arranged so as to be able to move forward and backward in a through hole of the movable platen 120. The front end of the ejector rod 210 contacts an ejector plate 826 of the movable mold 820. The front end of the ejector rod 210 may or may not be connected to the ejector plate 826.

[0049] The drive 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 that screws onto the screw shaft. A ball or roller may be interposed between the screw shaft and the screw nut.

[0050] The ejector unit 200 performs an ejection process under the control of the control unit 700. In the ejection process, the ejector rod 210 advances from the standby position to the ejection position at a set moving speed, thereby advancing the ejector plate 826 and ejecting the molded product. After that, the ejector motor is driven to move the ejector rod 210 backward at the set moving speed, and the ejector plate 826 backward to the original standby position.

[0051] The position and moving speed of the ejector rod 210 are detected, for example, by using an ejector motor encoder. The ejector motor encoder detects the rotation of the ejector motor and sends a signal indicating the detection result to the control device 700. Note that the ejector rod position detector that detects the position of the ejector rod 210 and the ejector rod moving speed detector that detects the moving speed of the ejector rod 210 are not limited to the ejector motor encoder, and general types can be used.

[0052] (injection device) In the description of the injection device 300, unlike the description of the mold clamping device 100 and the description of the ejector device 200, the movement direction of the screw 330 during filling (e.g., the negative X-axis direction) is described as the forward direction, and the movement direction of the screw 330 during metering (e.g., the positive X-axis direction) is described as the rearward direction.

[0053] The injection device 300 is installed on a slide base 301, and the slide base 301 is disposed so as to be movable forward and backward with respect to the injection device frame 920. The injection device 300 is disposed so as to be movable forward and backward with respect to the mold device 800. The injection device 300 touches the mold device 800, and fills the molding material measured in the cylinder 310 into a cavity space 801 in the mold device 800. The injection device 300 has, for example, a cylinder 310 for heating the molding material, a nozzle 320 provided at the front end of the cylinder 310, a screw 330 disposed in the cylinder 310 so as to be movable forward and backward and rotatable, a metering motor 340 for rotating the screw 330, an injection motor 350 for moving the screw 330 forward and backward, and a load detector 360 for detecting a load transmitted between the injection motor 350 and the screw 330.

[0054] Cylinder 310 heats the molding material supplied to the inside from supply port 311. The molding material includes, for example, resin. The molding material is formed, for example, in the shape of pellets, and is supplied to supply port 311 in a solid state. Supply port 311 is formed at the rear of cylinder 310. A cooler 312 such as a water-cooled cylinder is provided on the outer periphery of the rear of cylinder 310. A heater 313 such as a band heater and a temperature detector 314 are provided on the outer periphery of cylinder 310, forward of cooler 312.

[0055] Cylinder 310 is divided into a plurality of zones in the axial direction (e.g., X-axis direction) of cylinder 310. Each of the plurality of zones is provided with heater 313 and temperature detector 314. A set temperature is set for each of the plurality of zones, and control device 700 controls heater 313 so that the detected temperature of temperature detector 314 becomes the set temperature.

[0056] 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 the set temperature.

[0057] The screw 330 is disposed in the cylinder 310 so as to be rotatable and movable forward and backward. When the screw 330 is rotated, the molding material is sent forward along the spiral groove of the screw 330. As the molding material is sent forward, it is gradually melted by heat from the cylinder 310. As the liquid molding material is sent forward of the screw 330 and accumulates in the front part of the cylinder 310, the screw 330 is moved backward. Thereafter, when the screw 330 is moved forward, the liquid molding material accumulated in front of the screw 330 is injected from the nozzle 320 and filled into the mold device 800.

[0058] A check ring 331 is attached to the front of the screw 330 so as to be movable back and forth as a check valve for preventing the backflow of molding material from the front to the rear of the screw 330 when the screw 330 is pushed forward.

[0059] When the screw 330 is moved forward, the backflow prevention ring 331 is pushed backward by the pressure of the molding material in front of the screw 330, and moves backward relatively to the screw 330 to a blocking position (see FIG. 2) where the flow path of the molding material is blocked. This prevents the molding material accumulated in front of the screw 330 from flowing backward.

[0060] On the other hand, when the screw 330 is rotated, the backflow prevention ring 331 is pushed forward by the pressure of the molding material sent forward along the spiral groove of the screw 330, and moves forward relatively to the screw 330 to an open position (see FIG. 1) where the flow path of the molding material is opened. As a result, the molding material is sent forward of the screw 330.

[0061] The backflow prevention ring 331 may be either a co-rotating type that rotates together with the screw 330 or a non-co-rotating type that does not rotate together with the screw 330.

[0062] The injection device 300 may have a drive source for moving the backflow prevention ring 331 back and forth between the open position and the closed position relative to the screw 330.

[0063] The metering motor 340 rotates the screw 330. The drive source for rotating the screw 330 is not limited to the metering motor 340, and may be, for example, a hydraulic pump.

[0064] The injection motor 350 advances and retreats the screw 330. A motion conversion mechanism that converts the rotational motion of the injection motor 350 into the linear motion of the screw 330 is provided between the injection motor 350 and the screw 330. The motion conversion mechanism has, for example, a screw shaft and a screw nut that screws onto the screw shaft. A ball or roller may be provided between the screw shaft and the screw nut. The drive source that advances and retreats the screw 330 is not limited to the injection motor 350, and may be, for example, a hydraulic cylinder.

[0065] The load detector 360 detects the load transmitted between the injection motor 350 and the screw 330. The detected load is converted into pressure by the control device 700. The load detector 360 is provided on a load transmission path between the injection motor 350 and the screw 330, and detects the load acting on the load detector 360.

[0066] The load detector 360 sends a signal of the detected load to the control device 700. The load detected by the load detector 360 is converted into pressure acting between the screw 330 and the molding material, and is used to control and monitor the pressure that the screw 330 receives from the molding material, the back pressure on the screw 330, the pressure that the screw 330 acts on the molding material, and the like.

[0067] The pressure detector for detecting the pressure of the molding material is not limited to the load detector 360, and a general detector may be used. For example, a nozzle pressure sensor or a mold internal pressure sensor may be used. The nozzle pressure sensor is installed in the nozzle 320. The mold internal pressure sensor is installed inside the mold device 800.

[0068] The injection device 300 performs a metering process, a filling process, a pressure holding process, and the like under the control of the control device 700. The filling process and the pressure holding process may be collectively referred to as the injection process.

[0069] In the metering process, the metering motor 340 is driven to rotate the screw 330 at a set rotation speed, and the molding material is sent forward along the spiral groove of the screw 330. As a result, the molding material is gradually melted. As the liquid molding material is sent forward of the screw 330 and accumulates at the front of the cylinder 310, the screw 330 is moved backward. The rotation speed of the screw 330 is detected, for example, by using a metering motor encoder 341. 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. Note that the screw rotation speed detector that detects the rotation speed of the screw 330 is not limited to the metering motor encoder 341, and a general one can be used.

[0070] In the metering process, in order to restrict abrupt retraction of the screw 330, a set back pressure may be applied to the screw 330 by driving the injection motor 350. The back pressure on the screw 330 is detected, for example, by using a load detector 360. When the screw 330 retracts to the metering completion position and a predetermined amount of molding material is accumulated in front of the screw 330, the metering process is completed.

[0071] The position and rotation speed of the screw 330 in the metering process are set together as a series of setting conditions. For example, a metering start position, a rotation speed switching position, and a metering completion position are set. These positions are arranged in this order from the front to the rear, and represent the start and end points of the section in which the rotation speed is set. The rotation speed is set for each section. There may be one or more rotation speed switching positions. The rotation speed switching positions do not have to be set. In addition, a back pressure is set for each section.

[0072] In the filling step, the injection motor 350 is driven to move the screw 330 forward at a set moving speed, and the liquid molding material accumulated in front of the screw 330 is filled into the cavity space 801 in the mold device 800. The position and moving speed of the screw 330 are detected, for example, by using an injection motor encoder 351. 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. When the position of the screw 330 reaches a set position, switching from the filling step to the pressure holding step (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 may be changed depending on the position of the screw 330, time, etc.

[0073] The position and movement speed of the screw 330 in the filling process are set together as a series of setting conditions. For example, a filling start position (also called an "injection start position"), a movement speed switching position, and a V / P switching position are set. These positions are arranged in this order from the rear side to the front, and represent the start and end points of the section for which the movement speed is set. The movement speed is set for each section. There may be one or more movement speed switching positions. The movement speed switching positions do not have to be set.

[0074] An upper limit value for the pressure of the screw 330 is set for each section in which the moving speed of the screw 330 is set. The pressure of the screw 330 is detected by a load detector 360. When the pressure of the screw 330 is equal to or lower than the set pressure, the screw 330 is advanced at the set moving speed. On the other hand, when the pressure of the screw 330 exceeds the set pressure, the screw 330 is advanced at a moving speed slower than the set moving speed so that the pressure of the screw 330 is equal to or lower than the set pressure, for the purpose of protecting the mold.

[0075] After the position of the screw 330 reaches the V / P switching position in the filling process, the screw 330 may be temporarily stopped at the V / P switching position, and then the V / P switching may be performed. Immediately before the V / P switching, instead of stopping the screw 330, the screw 330 may be moved forward or backward at a slow speed. Furthermore, the screw position detector that detects the position of the screw 330 and the screw movement speed detector that detects the movement speed of the screw 330 are not limited to the injection motor encoder 351, and general detectors may be used.

[0076] In the holding pressure step, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material at 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 molding material that is insufficient due to cooling contraction in the mold device 800 can be replenished. The holding pressure is detected, for example, by a load detector 360. The set value of the holding pressure may be changed depending on the elapsed time from the start of the holding pressure step. The holding pressure and the holding time for which the holding pressure is held in the holding pressure step may each be set multiple times, or may be set collectively as a series of setting conditions.

[0077] In the dwelling step, the molding material in the cavity space 801 in the mold device 800 is gradually cooled, and when the dwelling step is completed, the entrance to the cavity space 801 is blocked by the solidified molding material. This state is called a gate seal, and prevents the molding material from flowing back from the cavity space 801. After the dwelling step, the cooling step is started. In the cooling step, the molding material in the cavity space 801 is solidified. A measuring step may be performed during the cooling step in order to shorten the molding cycle time.

[0078] The injection device 300 of this embodiment is of an in-line screw type, but may be of a pre-plastication type or the like. A pre-plastication type injection device supplies molding material molten in a plasticization cylinder to an injection cylinder, and injects the molding material from the injection cylinder into a mold device. A screw is disposed in the plasticization cylinder so as to be rotatable but unable to move forward or backward, or a screw is disposed so as to be rotatable and able to move forward or backward. Meanwhile, a plunger is disposed in the injection cylinder so as to be able to move forward or backward.

[0079] Furthermore, the injection device 300 of this embodiment is a horizontal type in which the axial direction of the cylinder 310 is horizontal, but may be a vertical type in which the axial direction of the cylinder 310 is vertical. A mold clamping device to be combined with the vertical injection device 300 may be either a vertical type or a horizontal type. Similarly, a mold clamping device to be combined with the horizontal injection device 300 may be either a horizontal type or a vertical type.

[0080] (Mobile device) 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 (for example, the negative X-axis direction) is the front, and the moving direction of the screw 330 during metering (for example, the positive X-axis direction) is the rear.

[0081] 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 to generate a nozzle touch pressure. The moving device 400 includes a hydraulic pump 410, a motor 420 as a drive source, a hydraulic cylinder 430 as a hydraulic actuator, and the like.

[0082] The hydraulic pump 410 has a first port 411 and a second port 412. The hydraulic pump 410 is a pump that can rotate in both directions, and by switching the rotation direction of the motor 420, it draws in hydraulic fluid (e.g., oil) from one of the first port 411 and the second port 412 and discharges it from the other, thereby generating hydraulic pressure. Note that the hydraulic pump 410 can also draw in hydraulic fluid from a tank and discharge the hydraulic fluid from one of the first port 411 and the second port 412.

[0083] The motor 420 operates the hydraulic pump 410. The motor 420 drives the hydraulic pump 410 with a rotational direction and rotational torque according to a control signal from the control device 700. The motor 420 may be an electric motor or an electric servo motor.

[0084] The hydraulic cylinder 430 has a cylinder body 431, a piston 432, and a piston rod 433. The cylinder body 431 is fixed to the injection device 300. The piston 432 divides the inside of the cylinder body 431 into a front chamber 435 as a first chamber and a rear chamber 436 as a second chamber. The piston rod 433 is fixed to the fixed platen 110.

[0085] A front chamber 435 of the hydraulic cylinder 430 is connected to a first port 411 of the hydraulic pump 410 via a first flow path 401. The hydraulic fluid discharged from the first port 411 is supplied to the front chamber 435 via the first flow path 401, thereby pushing the injection unit 300 forward. The injection unit 300 is moved forward, and the nozzle 320 is pressed against the fixed die 810. The front chamber 435 functions as a pressure chamber that generates a nozzle touch pressure of the nozzle 320 by the pressure of the hydraulic fluid supplied from the hydraulic pump 410.

[0086] On the other hand, the rear chamber 436 of the hydraulic cylinder 430 is connected to the second port 412 of the hydraulic pump 410 via the second flow path 402. The hydraulic fluid discharged from the second port 412 is supplied to the rear chamber 436 of the hydraulic cylinder 430 via the second flow path 402, thereby pushing the injection unit 300 backward. The injection unit 300 is moved backward, and the nozzle 320 is separated from the fixed mold 810.

[0087] In this embodiment, the moving device 400 includes the hydraulic cylinder 430, but the present invention is not limited to this. For example, instead of the hydraulic cylinder 430, 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.

[0088] (Control device) The control device 700 is composed of, for example, a computer, and has a CPU (Central Processing Unit) 701, a storage medium 702 such as a memory, an input interface 703, an output interface 704, and a communication interface 705 as shown in Figs. 1 and 2. The control device 700 performs various controls by causing the CPU 701 to execute a program stored in the storage medium 702. The control device 700 also receives signals from the outside through the input interface 703, and transmits signals to the outside through the output interface 704. The control device 700 also transmits information to an external device through the communication interface 705.

[0089] The control device 700 repeatedly performs a metering process, mold closing process, pressure increase process, mold clamping process, filling process, pressure holding process, cooling process, pressure release process, mold opening process, and ejection process, etc., to repeatedly produce molded products. A series of operations to obtain a molded product, for example, an operation from the start of a metering process to the start of the next metering process, is also called a "shot" or a "molding cycle." The time required for one shot is also called the "molding cycle time" or "cycle time."

[0090] One molding cycle includes, for example, a metering process, a mold closing process, a pressure increase process, a mold clamping process, a filling process, a pressure holding process, a cooling process, a pressure release process, a mold opening process, and an ejection process, in this order. The order here refers to the order in which each process starts. The filling process, the pressure holding process, and the cooling process are performed during the mold clamping process. The start of the mold clamping process may coincide with the start of the filling process. The completion of the pressure release process coincides with the start of the mold opening process.

[0091] In addition, in order to shorten the molding cycle time, a plurality of processes may be performed simultaneously. For example, the metering process may be performed during the cooling process of the previous molding cycle, or during the mold clamping process. In this case, the mold closing process may be performed at the beginning of the molding cycle. The filling process may be started during the mold closing process. The ejection process may be started during the mold opening process. In the case where an opening / closing valve for opening and closing the flow path of the nozzle 320 is provided, the mold opening process may be started during the metering process. This is because even if the mold opening process is started during the metering process, the molding material will not leak from the nozzle 320 as long as the opening / closing valve closes the flow path of the nozzle 320.

[0092] Note that one molding cycle may include steps other than the metering step, mold closing step, pressure increase step, mold clamping step, filling step, pressure holding step, cooling step, depressurization step, mold opening step, and ejection step.

[0093] For example, after the dwelling step is completed, a pre-metering suck-back step may be performed in which the screw 330 is retracted to a preset metering start position before the metering step is started. This can reduce the pressure of the molding material accumulated in front of the screw 330 before the metering step starts, and can prevent the screw 330 from suddenly retracting at the start of the metering step.

[0094] Furthermore, after the metering step is completed, a post-metering suck-back step may be performed in which the screw 330 is moved back to a preset filling start position (also called the "injection start position") before the filling step is started. This can reduce the pressure of the molding material accumulated in front of the screw 330 before the filling step is started, and can prevent the molding material from leaking from the nozzle 320 before the filling step is started.

[0095] The control device 700 is connected to an operation device 750 that accepts input operations by an operator and a display device 760 that displays a screen. The operation device 750 and the display device 760 may be configured, for example, by a touch panel 770 and may be integrated. The touch panel 770 as the display device 760 displays a screen under the control of the control device 700. For example, the display device 760 may include a liquid crystal panel (one example of a display unit) for displaying a screen. Note that the display unit is not limited to a liquid crystal panel, and other display devices such as an organic EL may be used. For example, information such as settings of the injection molding machine 10 and a current state of the injection molding machine 10 may be displayed on the screen of the touch panel 770. The touch panel 770 is capable of accepting operations in the displayed screen area. In addition, for example, operation units such as buttons and input fields that accept input operations by an operator may be displayed on the screen area of ​​the touch panel 770. The touch panel 770 as the operation device 750 detects an input operation on the screen by the operator and outputs a signal corresponding to the input operation to the control device 700. This allows, for example, an operator to operate an operation unit provided on the screen while checking information displayed on the screen to set the injection molding machine 10 (including input of set values). Also, by operating the operation unit provided on the screen, the operator can cause the injection molding machine 10 to operate in a manner corresponding to the operation unit. Note that the operation of the injection molding machine 10 may be, for example, the operation (including stopping) of the clamping device 100, the ejector device 200, the injection device 300, the moving device 400, etc. Also, the operation of the injection molding machine 10 may be, for example, switching of a screen displayed on a touch panel 770 serving as the display device 760, etc.

[0096] In this embodiment, the operation device 750 and the display device 760 are described as being integrated as the touch panel 770, but they may be provided independently. Also, a plurality of operation devices 750 may be provided. The operation device 750 and the display device 760 are disposed on the operation side (Y-axis negative direction) of the mold clamping unit 100 (more specifically, the fixed platen 110).

[0097] (First embodiment) FIG. 3 is a diagram showing components of the control device 700 of the injection molding machine 10 according to the present embodiment in the form of functional blocks. Each functional block shown in FIG. 3 is conceptual, and does not necessarily have to be physically configured as shown in the figure. All or a part of each functional block can be functionally or physically distributed or integrated in any unit. All or any part of the processing functions performed by each functional block of the control device 700 is realized by a program executed by the CPU 701. Alternatively, each functional block may be realized as hardware using wired logic. As shown in FIG. 3, the CPU 701 of the control device 700 includes a receiving unit 711, a display control unit 712, a storage unit 713, and a calculation unit 714. The control device 700 also includes an information storage unit 721 in the storage medium 702.

[0098] The information storage unit 721 stores log information indicating performance values ​​that are detection results by various sensors (an example of a detection unit).

[0099] The display control unit 712 controls the display of data such as a display screen on the touch panel 770. The display control unit 712 according to this embodiment may output a display screen showing, for each shot, performance values ​​detected in each step of the molding process by the injection molding machine 10 to the touch panel 770. Note that, although this embodiment describes an example in which a display screen or the like is output to the touch panel 770, the output destination of data is not limited to the touch panel 770. For example, the display control unit 712 may output data such as a display screen to a portable communication device (not shown) connected via a network.

[0100] The reception unit 711 receives a user's operation from the touch panel 770 via the input interface 703 .

[0101] The saving unit 713 stores the actual values ​​and statistical values ​​during molding as log information in the information storage unit 721. The operation for saving as log information is performed on the log information screen displayed by the display control unit 712. The specific operation will be described later.

[0102] The calculation unit 714 calculates statistical values ​​based on performance values ​​from various sensors, etc., in order to display them on the log information screen.

[0103] In this embodiment, a case will be described where an operation is performed on a display screen displayed on a touch panel 770 of the injection molding machine 10. A reception unit 711 according to this embodiment can receive the selection of an arbitrary area displayed on the touch panel 770 and the input of numerical values ​​or characters via an operation device 750 of the touch panel 770.

[0104] The display control unit 712 according to this embodiment displays a log information screen that displays, for example, actual results and statistical values ​​during molding as log information.

[0105] FIG. 4 is a diagram illustrating an example of a log information screen output by the display control unit 712 according to the present embodiment.

[0106] The log information screen 1400 shown in FIG. 4 displays a total number 1411, a number of good items 1412, a number of defective items 1413, a number of rejected items 1414, a logging button 1415, a monitoring settings button 1416, a save button 1417, an update button 1418, a statistics list 1420, and a performance list 1430.

[0107] The statistics list 1420 shows statistical information (for example, average, range, maximum, minimum, standard deviation) for each of the setting fields 1421 to 1427. The contents shown in the setting fields 1421 to 1427 can be set by the user. In this embodiment, it is possible to display, monitor, and save log information for the items shown in the setting fields 1421 to 1427. Note that monitoring in this embodiment refers to judging whether or not an item is non-defective based on a predetermined standard.

[0108] The statistical information is information calculated based on actual values ​​(one example of parameters) obtained each time a molded product is manufactured by performing injection molding with the injection molding machine 10, and includes, for example, the average, range, maximum, minimum, and standard deviation calculated for each of the setting fields 1421 to 1427 in the statistics list 1420. Note that this embodiment shows an example of statistical information, and statistical information other than the average, range, maximum, minimum, and standard deviation, such as an integral value, may be used. Also, the items for which the statistical information is calculated are not limited to the items set in the setting fields 1421 to 1427, and may be other items.

[0109] The calculation unit 714 calculates statistical information by including, as calculation targets, performance values ​​(one example of parameters) obtained in injection molding within the range shown in the performance list 1430. Then, the display control unit 712 displays the statistical information calculated by the calculation unit 714 in the statistics list 1420.

[0110] The "Monitoring", "Monitoring value", and "Range" in the statistics list 1420 are information for determining whether or not the molded product in the corresponding setting field is defective.

[0111] When monitoring in the statistics list 1420 is "OFF", the control device 700 does not perform monitoring, and when it is "ON", the control device 700 performs monitoring. When it is "ON", the control device 700 judges whether or not the measured performance value for the item shown in the setting field satisfies the criteria shown in the "monitoring value" and "range" (for example, whether or not it is included within the "range" with the "monitoring value" as the median). The monitoring is switched by the monitoring setting button 1406.

[0112] The "Defective" section of the statistics table 1420 indicates the number of molded articles that do not meet the criteria indicated by the "Monitoring Value" and "Range."

[0113] The "Cycle Time" in setting field 1421, the "Filling Time" in setting field 1422, and the "Weighing Time" in setting field 1423 are items set to monitor the time required for the cycle, filling, and metering.

[0114] The "VP switching position" in the setting field 1424 is an item set to monitor the position of the screw 330 when switching from the filling process to the pressure holding process (V / P switching position). The "minimum cushion position" in the setting field 1425 is an item set to monitor the position of the screw 330 when it moves to the frontmost position when pressure is applied after filling the molding material into the mold device 800. The "filling peak pressure" in the setting field 1426 is an item set to monitor the peak value of the pressure when the molding material is filled. The "pressure holding completion position" in the setting field 1427 is an item set to monitor the position of the screw 330 when pressure holding is completed.

[0115] The setting fields 1421 to 1427 can be changed to items that the user wishes to monitor. A method for changing the items will not be described here.

[0116] The result list 1430 shows a list of setting information (e.g., set values) for the items set in the setting fields 1421 to 1427 or result values ​​measured by various sensors for each shot. The items set in the setting fields 1421 to 1427 are set to "CH1" to "CH7". In addition, each shot is associated with a "shot number", "time" of injection molding, and "identification" of injection molding as information indicating the shot.

[0117] The logging button 1415 is a button for accepting a selection of whether or not to save the performance values ​​shown in the performance list 1430 as log information. When the logging button 1415 is pressed (displays "DATA LOGGING ON"), the saving unit 713 saves the information shown in the performance list 1430 (for example, performance values ​​from various sensors) and the like in the information storage unit 721 as log information.

[0118] The monitoring setting button 1416 is a button for accepting whether or not to monitor according to the monitoring items in the statistics list 1420. When the monitoring setting button 1416 is pressed (displaying "Monitoring On"), each shot is monitored for defects and the monitoring results are included in the log information. When the monitoring setting button 1416 is pressed, it becomes possible to switch monitoring for each of the setting fields 1421 to 1427 in the statistics list 1420 to "Off" or "On".

[0119] The save button 1417 is a button for accepting whether or not to save the statistical values ​​(for example, average, range, maximum, minimum, standard deviation, etc.) for each of the setting fields 1421 to 1427. When the save button 1417 is pressed, the save unit 713 saves the statistical values ​​for each of the setting fields 1421 to 1427 and the performance values ​​shown in the performance list 1430 as log information in the information storage unit 721. In the present embodiment, an example in which performance values ​​are displayed in the setting fields 1421 to 1427 and the performance list 1430 of the statistics list 1420 has been described, but the display is not limited to the performance values. For example, the setting values ​​may be displayed in the setting fields 1421 to 1427 and the performance list 1430 of the statistics list 1420. In this case, when the save button 1417 is pressed, the save unit 713 may save the setting values.

[0120] The update button 1418 is a button for accepting whether or not to update the statistics list 1420 and the performance list 1430 every time injection molding is completed by the injection molding machine 10. When the update button 1418 is pressed (displays "Always"), the statistics list 1420 and the performance list 1430 are updated every time injection molding is completed by the injection molding machine 10.

[0121] Total number 1411 indicates the number of molded products molded by the injection molding machine 10. Number of good products 1412 indicates the number of molded products that are determined to be good products based on "Monitoring", "Monitoring value", and "Range". Number of defective products 1413 indicates the number of molded products that are determined to be defective products based on "Monitoring", "Monitoring value", and "Range". Number of rejected products 1414 indicates the number of rejected molded products.

[0122] As described above, when a plurality of molded products are produced from molding material by the injection molding machine 10 (production device), the display control unit 712 of the control device 700 displays, for each of the molded products, performance values ​​(one example of detection results) detected by various sensors in the process of producing the molded products in the performance list 1430 of the display device 760. In addition, in the statistics list 1420 of this embodiment, maximum values, minimum values, etc. (one example of detection results extracted by a statistical method) are displayed selectably via the touch panel 770 for each of the setting fields 1421 to 1427 (for each item that classifies the detection results).

[0123] For example, when the receiving unit 711 receives a selection of the maximum or minimum value in the statistical list 1420, the display control unit 712 displays in the performance list 1430 a row (record) indicating the first molded product for which the selected maximum or minimum value was detected, as well as a record indicating a molded product that was molded by the injection molding machine 10 before the first molded product, and a record indicating a molded product that was molded by the injection molding machine 10 after the first molded product.

[0124] Next, a description will be given of a case where a selection of a maximum or minimum value of the statistics list 1420 is accepted. Fig. 5 is a diagram showing an example of a change in the screen when a selection of a maximum value of a column in the setting field 1423 of the statistics list 1420 of the log information screen according to this embodiment is accepted.

[0125] 5 is a log information screen including the statistics list 1420. The operator refers to the screen 1501 in Fig. 5 and presses cell 1511 indicating the maximum value in the column of the setting field 1423 for "measurement time" to check the situation when the "measurement time" reached the maximum value of "4.58".

[0126] This causes a change from screen 1501 to screen 1502. Specifically, the display control unit 712 controls the scrolling of the table in the results list (an example of a first display area) 1430 so that the record with CH3 of "4.58" is located at the center of the results list 1430. CH3 corresponds to "weighing time". Then, by controlling the scrolling, record 1531 relating to the molded product with "weighing time" of "4.58" is displayed at the center of the results list 1430.

[0127] Furthermore, the display control unit 712 displays the cell 1521 of the maximum value in the column of the setting field 1423 of the statistics list 1420 in a color different from the other cells, thereby allowing the operator to recognize that the maximum value of "measurement time" has been selected.

[0128] Furthermore, the display control unit 712 displays positions 1535, 1536 of records in which the "weighing time" is "4.58" in a scroll bar 1537 of the performance list 1430. This allows the operator to recognize that there are two molded products with a "weighing time" of "4.58" and the approximate timing at which the molded products with a "weighing time" of "4.58" were molded. In other words, the operator can recognize whether the timing at which the molded products with a "weighing time" of "4.58" were molded was sudden or continuous, etc.

[0129] In screen 1502 , knob 1534 is positioned so that position 1535 is the center, and so record 1531 corresponding to position 1535 is displayed in the center of list of achievements 1430 .

[0130] In screen 1502, record 1531, which has the maximum value of "weighing time" of "4.58", is displayed in shot order, along with record 1532, which is for six shots formed before the shot indicated by record 1531, and record 1533, which is for six shots formed after the shot indicated by record 1531.

[0131] In other words, when the operator checks the detection results for a molded product whose "weighing time" has reached the maximum value of "4.58", he or she can also check the detection results for the six shots before and after that molded product.

[0132] This enables the operator to confirm, for example, whether the "weighing time" becoming the maximum value of "4.58" was a sudden occurrence or a result of the weighing time increasing with time.

[0133] In other words, when a molded product is produced and any item reaches a maximum or minimum value, it is difficult for an operator to understand the circumstances and circumstances that led to that detection result by simply referring to the detection results of that molded product.

[0134] Therefore, in this embodiment, when the receiving unit 711 receives a selection of the maximum value of "weighing time" from the operator, the display control unit 712 not only displays the record of the maximum value of "weighing time", but also displays records of six shots before and after the number of shots indicated in the record of the maximum value of "weighing time" in the performance list 1430.

[0135] This allows the operator to grasp the change in the detection result of each shot until the "measurement time" reaches its maximum value, and the change in the detection result of each shot after the "measurement time" reaches its maximum value. In other words, the operator can grasp the change in the situation in chronological order, such as the situation before the "measurement time" reaches its maximum value, and the situation after the "measurement time" reaches its maximum value.

[0136] On screen 1502, when the reception unit 711 receives an operation from the operator to move knob (knob) 1534 to position 1536, the display control unit 712 displays another record in which the “measurement time” has reached the maximum value.

[0137] Furthermore, on the screen 1502, when the receiving unit 711 receives again the selection of cell 1521 with the maximum value in the column of the setting field 1423 of the statistics list 1420, the display control unit 712 may scroll so that the record with the other maximum value for "weighing time" is displayed in the center of the results list 1430. In this way, in this embodiment, it is possible to check all the detection results of the molded product with the maximum value for "weighing time", including the circumstances before and after.

[0138] In the example shown in FIG. 5, the detection results of six shots before and after the molded product are displayed together with the molded product for which the selected statistical information was detected. However, this embodiment is not limited to the example of displaying the detection results of six shots before and after the molded product. For example, the detection results of seven or more shots before and after the molded product may be displayed, or the detection results of five or less shots before and after the molded product may be displayed. In other words, the control device 700 according to this embodiment only needs to display the detection results of the first molded product (an example of a first product) for which the selected statistical information was detected, and also display on the display device 760 the detection results of the molded product (an example of a second product) molded at least one before the first molded product, and the detection results of the molded product (an example of a third product) molded at least one after the first molded product.

[0139] Also, in this embodiment, it has been described that control is performed to scroll the results list 1430 when displaying the above-mentioned record at the center. However, control in the table of the results list 1430 is not limited to scrolling, and for example, the display control unit 712 may perform control to jump the above-mentioned record at the center.

[0140] (Modification of the first embodiment) In the above-described embodiment, an example has been described in which the results list 1430 displays the detection results of the molded product corresponding to the statistical information selected in the statistics list 1420. However, the above-described embodiment is not limited to the aspect of displaying in the results list 1430. Therefore, in a modified example of the first embodiment, an example will be described in which the detection results of the molded product corresponding to the selected statistical information are displayed in a pop-up.

[0141] Fig. 6 is a diagram illustrating a log information screen output by the display control unit 712 according to this modification. In the example shown in Fig. 6, the receiving unit 711 receives a press of a cell 1601 indicating the maximum value (2.68) in the column of the setting field 1425 for "minimum cushion position."

[0142] When a cell 1601 is pressed, the display control unit 712 displays a pop-up window 1610 in addition to the performance list 1430 .

[0143] In the pop-up window 1610, a record 1611 in which CH5 is "2.680" is displayed in the center of a table 1615. This displays the detection result of a molded product that was molded when the "minimum cushion position" corresponding to CH5 was "2.680".

[0144] In the pop-up window 1610, record 1611, which has the maximum value of "minimum cushion position" of "2.680", is displayed in shot order, along with records 1612 for six shots formed before the shot indicated by record 1611, and records 1613 for six shots formed after the shot indicated by record 1611.

[0145] Furthermore, the display control unit 712 displays the cell 1601 of the maximum value in the column of the setting field 1425 of the statistics list 1420 in a color different from the other cells, thereby allowing the operator to recognize that the maximum value of the "minimum cushion position" has been selected.

[0146] Furthermore, in the pop-up window 1610, if there are multiple molded products corresponding to the selected statistical information, the table to be displayed can be switched.

[0147] The pop-up window 1610 shown in FIG. 6 indicates that the detection results for the second molded product out of the three molded products for which the "minimum cushion position" reached the maximum value of "2.680" are displayed, as indicated by "2 / 3" in the page display field 1621.

[0148] Then, when the receiving unit 711 receives a press of the page forward icon 1622, 1623, the display control unit 712 switches to displaying the detection results of other moldings among the three moldings whose "minimum cushion position" is the maximum value "2.680".

[0149] In this way, when the control device 700 of this modified example accepts the selection of the maximum or minimum value shown in the statistical list 1420, it displays a pop-up window 1610 separate from the performance list 1430, and displays in the pop-up window 1610 the detection results of the first molded product which has the maximum value for the "minimum cushion position" and the detection results of six molded shots which were molded before and after the first molded product.

[0150] In this modified example, by displaying information regarding the statistical information selected by the operator in a pop-up window 1610 separate from the performance list 1430, it is possible to achieve the same effect as in the above-described embodiment, and to check the situation when the statistical information selected in the pop-up window 1610 occurred in parallel with checking the current situation in the performance list 1430.

[0151] Second Embodiment The above-described embodiment and modified examples have been described with reference to the case where a selection is received from statistical information shown in the statistical list 1420. However, the above-described embodiment does not limit the reception of a selection for displaying a detection result to the statistical list 1420. Therefore, in the second embodiment, an example in which a selection is received from the performance list 1430 will be described.

[0152] In this embodiment, similarly to the first embodiment, a log information screen including a statistics list 1420 and a performance list 1430 as shown in FIG. 4 is displayed.

[0153] Fig. 7 is a diagram showing an example of a change in the screen when an operation to sort by CH5 is received in the performance list 1430 of the log information screen according to this embodiment. It is assumed that the display is the same as that in Fig. 4 except for the area displayed in Fig. 7. In this embodiment, in the performance list 1430, selection can be received for each of CH1 to CH7 into which the performance values ​​are classified.

[0154] First, the number of shots is displayed in chronological order in a partial area 1701 of the screen in Fig. 7. Then, the reception unit 711 receives a press on the cell 1711 of "CH5" in the results list 1430. As a result, the records of the molded products in the results list 1430 are sorted based on the results value indicated by "CH5".

[0155] First, in a partial area 1702 of the screen in Fig. 7, the result list 1430 is shown after the result values ​​indicated by "CH5" have been sorted in descending order. This allows the operator to understand the result values ​​indicated by "CH5" in descending order from the maximum value. In the example shown in Fig. 7, the selection of each cell displayed in the result list 1430 (an example of the selection of the detection result) can be accepted.

[0156] 7 illustrates an example in which the performance values ​​are sorted in descending order, but the present invention is not limited to this example. For example, when the reception unit 711 receives a press on the cell of "CH5" in the performance list 1430 again, the display control unit 712 may display the performance list 1430 in which the performance values ​​are sorted in ascending order.

[0157] In this embodiment, when a selection of a predetermined item (e.g., CH1 to CH7) is received, the display control unit 712 sorts and displays the performance values ​​for each molded product in the item in ascending or descending order. The receiving unit 711 can then receive a selection of the sorted and displayed performance values.

[0158] Then, the receiving unit 711 receives the selection of the cell 1721 which is the maximum result value "9.993" displayed in the result list 1430.

[0159] A partial area 1703 in FIG. 7 shows a partial area of ​​the log information screen that is displayed by the display control unit 712 after the selection of the cell 1721 in the partial area 1702 is accepted.

[0160] In a portion of the area 1703, record 1731, in which the maximum actual value of "CH5" was "9.993", is centered around record 1732, which is for the seven shots formed before the shot indicated by record 1731, and record 1733, which is for the seven shots formed after the shot indicated by record 1731, are displayed in shot order.

[0161] In the example shown in FIG. 7, cell 1734 of the performance value for which a selection has been accepted is displayed in a color different from the other cells.

[0162] This allows the operator to grasp the change in the detection result of each shot until the "minimum cushion position" corresponding to "CH5" reaches its maximum value, and the change in the detection result of each shot after the "minimum cushion position" reaches its maximum value. The operator can grasp the change in the situation in chronological order, such as the situation before the "minimum cushion position" reaches its maximum value, and the situation after the "minimum cushion position" reaches its maximum value.

[0163] In this embodiment, when the operator selects a CH from the performance list 1430, the performance values ​​of the selected CH can be grasped in ascending or descending order, and by selecting the performance value, the operator can recognize changes in the situation based on the performance value.

[0164] (Modification of the second embodiment) In the above-described second embodiment, an example has been described in which the performance values ​​of an item (e.g., "CH5") whose selection has been accepted are sorted and displayed in descending or ascending order in the performance list 1430. However, the second embodiment is not limited to the example of sorting the performance values ​​of an item (e.g., "CH5") whose selection has been accepted in descending or ascending order. Therefore, in a modified example of the second embodiment, an example will be described in which the performance values ​​of an item (e.g., "CH5") whose selection has been accepted are filtered using a maximum or minimum value (an example of a predetermined condition).

[0165] Fig. 8 is a diagram showing an example of a change in the screen when an operation to filter in CH5 is accepted in the results list 1430 of the log information screen according to this modification. Note that it is assumed that the display is the same as that in Fig. 4 except for the area displayed in Fig. 8.

[0166] First, the number of shots is displayed in chronological order in a partial area 1801 of the screen in Fig. 8. Then, the reception unit 711 receives a press on a cell 1811 of "CH5" in the results list 1430. As a result, the results list 1430 is filtered by the maximum value of the results value indicated by "CH5".

[0167] A partial area 1802 of the screen in Fig. 8 shows the result list 1430 after the result value indicated by "CH5" has been filtered by the maximum value. This allows the operator to know the maximum value of the result value indicated by "CH5". In the example shown in Fig. 8, the selection of each cell displayed in the result list 1430 can be accepted.

[0168] 8 illustrates an example in which the performance values ​​are filtered by the maximum value, but is not limited to the example in which the performance values ​​are filtered by the maximum value. For example, when the reception unit 711 receives a press on the cell of "CH5" in the performance list 1430 again, the display control unit 712 may filter the performance values ​​by the minimum value and display the performance list 1430.

[0169] In this embodiment, when a selection of a predetermined item (e.g., CH1 to CH7) is received, the display control unit 712 filters the performance values ​​for each molded product in the item using the maximum or minimum value and displays them. The receiving unit 711 is then able to receive a selection of the performance values ​​displayed after filtering.

[0170] Then, the receiving unit 711 receives the selection of the cell 1821 whose performance value displayed in the performance list 1430 is the maximum value "9.993".

[0171] A partial area 1803 in FIG. 8 shows a partial area of ​​the log information screen that is displayed by the display control unit 712 after the selection of the cell 1821 in the partial area 1802 is accepted.

[0172] In a portion of the area 1803, record 1831, in which the maximum actual value of "CH5" was "9.993", is centered around record 1832, which is for the seven shots formed before the shot indicated by record 1831, and record 1833, which is for the seven shots formed after the shot indicated by record 1831, are displayed in shot order.

[0173] In the example shown in FIG. 8, cell 1834 of the performance value for which a selection has been accepted is displayed in a color different from the other cells.

[0174] As a result, in this modification, the operator can grasp the change in the detection result of each shot until the "minimum cushion position" corresponding to "CH5" reaches its maximum value, and the change in the detection result of each shot after the "minimum cushion position" reaches its maximum value, so that the same effect as in the second embodiment described above can be obtained. Note that this modification has been described with respect to a case where the filtering condition is a maximum value or a minimum value. However, this modification does not limit the filtering condition to a maximum value or a minimum value, and other conditions may be used.

[0175] (Third embodiment) In the above-described embodiment and modified examples, an example has been described in which the detection results of each shot are displayed in chronological order when a selection of the maximum or minimum value of the performance values ​​detected by various sensors is accepted. However, the above-described embodiment and modified examples do not limit the selection to the maximum or minimum value of the performance values. Therefore, in the third embodiment, an example will be described in which a selection of the number of shots, in other words, information for identifying a molded product, is accepted.

[0176] 9 is a diagram illustrating a log information screen output by the display control unit 712 according to the present embodiment. The log information screen shown in FIG. 9 shows a bad shot list 1940 in addition to a statistics list 1420 and a performance list 1430.

[0177] In the example shown in FIG. 9, since the monitoring setting button 1416 is pressed (displaying "Monitoring ON"), each shot is monitored to see if it is a defective product.

[0178] In the example shown in FIG. 9, as shown in the statistics list 1420, monitor 1921 is set to "on" in the column of the "minimum cushion position" setting field 1425.

[0179] In this case, the control device 700 judges, for each shot, whether or not the actual value of the "minimum cushion position" satisfies the criteria indicated by the "monitor value" and "range". For example, it judges whether or not the actual measurement value is included within the range indicated by "0.15" indicated by "range" 1923, using "2.50" indicated by "monitor value" 1922 as the criteria.

[0180] A molded product that does not satisfy the criteria indicated by the "monitoring value" and the "range" is judged to be a defective product, in other words, a product in which an abnormality has occurred. In this embodiment, an example is described in which the number of shots is indicated as information for identifying a molded product (one example of a product) in which an abnormality has occurred. However, the information for identifying a molded product is not limited to the number of shots, and may be, for example, the time of molding. In this embodiment, an example is described in which whether or not an abnormality has occurred is determined based on the actual value of the "minimum cushion position". However, in this embodiment, the determination is not limited to the determination method based on the actual value of the "minimum cushion position", and the determination may be performed based on other items. Furthermore, in this embodiment, the determination for identifying a molded product is not limited to the determination of whether or not an abnormality has occurred in the product, and may be performed under other conditions.

[0181] If the control device 700 determines that the criteria are not met, the display control unit 712 displays in the number of defective products 1911 the number of molded products that are determined to not meet the criteria.

[0182] Furthermore, when the control device 700 determines that the standard is not met, the display control unit 712 displays in the defective shot list 1940 the number of shots of the molded product determined to not meet the standard.

[0183] 9, there are three molded products that have been determined not to meet the standards, as shown in the number of defective products 1911. And the list of defective shots 1940 shows the shot numbers "135", "84", and "54" which indicate the molded products that have been determined not to meet the standards.

[0184] In the example shown in FIG. 9, the receiving unit 711 is capable of receiving the selection of cells 1941, 1942, and 1943 corresponding to the shot numbers "135", "84", and "54", which indicate molded products that have been determined not to satisfy the criteria.

[0185] When the receiving unit 711 receives the selection of the cell 1941 corresponding to the number of shots "135", the display of the result list 1430 is switched.

[0186] Specifically, the display control unit 712 performs control to scroll the table in the result list 1430 so that the record with the shot count "135" is at the center of the result list 1430.

[0187] The display control unit 712 also displays positions 1935, 1936, and 1937 in a scroll bar 1938 of the performance list 1430 indicating the number of shots that indicate molded products that have been determined not to satisfy the criteria.

[0188] In the example shown in FIG. 9, knob 1934 is positioned so that position 1935 is the center, and so record 1931 corresponding to position 1935 is displayed in the center of achievement list 1430 .

[0189] Record 1931, which indicates a molded product that was determined not to meet the standards, is displayed in the center, along with records 1932 for six shots molded before the shot indicated by record 1931, and records 1933 for six shots molded after the shot indicated by record 1931, in shot order.

[0190] In other words, when an operator checks the detection results for a defective molded product, he or she can also check the detection results for the six shots before and after that molded product.

[0191] This allows the operator to check, for example, whether the molding of a defective product was a sudden occurrence or the result of changes over time.

[0192] (Modification of the third embodiment) In the third embodiment, an example has been described in which the number of shots of molded products determined not to meet the criteria is displayed in the defective shot list 1940. However, the third embodiment is not limited to the example in which the number of shots of molded products determined not to meet the criteria is collectively displayed in the defective shot list 1940. Therefore, in a modified example of the third embodiment, an example will be described in which the number of shots of molded products determined not to meet the criteria for each item is displayed separately.

[0193] Fig. 10 is a diagram illustrating a log information screen output by the display control unit 712 according to this modification. Compared to the log information screen shown in Fig. 9, the log information screen shown in Fig. 10 shows a CH3 defect list 2040 and a CH5 defect list 2050 instead of the defective shot list 1940.

[0194] In the example shown in FIG. 10, since the monitoring setting button 1416 is pressed (displaying "Monitoring ON"), each shot is monitored to see if it is a defective product.

[0195] In the example shown in FIG. 10, as shown in the statistics list 1420, monitoring 2024 is set to "on" in the column of setting field 1423 for "weighing time", and monitoring 2021 is set to "on" in the column of setting field 1425 for "minimum cushion position".

[0196] In this case, the control device 700 judges for each shot whether the actual values ​​of the "measurement time" and the "minimum cushion position" satisfy the criteria indicated by the "monitoring value" and the "range." The judgment method is the same as that of the above-mentioned embodiment, so the explanation is omitted.

[0197] Molded products that do not meet the standards indicated by the "monitoring values" and "ranges" are judged to be defective products, in other words, products with abnormalities.

[0198] If the control device 700 determines that the criteria are not met, the display control unit 712 displays in the number of defective products 1911 the number of molded products that are determined to not meet the criteria.

[0199] Furthermore, when the control device 700 determines that the standard is not met for the “weighing time”, the display control unit 712 displays in the CH3 defect list 2040 the number of shots of the molded product determined to not meet the standard. On the other hand, if the control device 700 determines that the standard is not met for the “minimum cushion position”, the display control unit 712 displays the number of shots of the molded product that is determined to not meet the standard in the CH5 defect list 2050.

[0200] In this embodiment, the number of shots of molded products determined to be defective for each item is displayed. That is, in the example shown in Fig. 10, since "monitoring" is "on" for "weighing time" and "minimum cushion position", a CH3 defect list 2040 and a CH5 defect list 2050 are displayed. In this way, the display control unit 712 may display different defect lists depending on the items for which "monitoring" is "on".

[0201] Other display areas are similar to those in Fig. 9 of the third embodiment. In other words, when the receiving unit 711 receives the selection of cell 2051 corresponding to the number of shots "135", the display control unit 712 displays, in shot order, records 2032 for six shots molded before the shot indicated by record 2031 and records 2033 for six shots molded after the shot indicated by record 2031, with record 2031 indicating the molded product determined not to satisfy the criteria at the center.

[0202] (Fourth embodiment) The above-mentioned embodiment and modified examples have been described with respect to the case where a production management device is incorporated into the injection molding machine 10. However, the above-mentioned embodiment and modified examples are not limited to the method of incorporating the production management device into the injection molding machine 10. In other words, a device connected to the injection molding machine 10 via a network may be used as the production management device. Therefore, in the fourth embodiment, a case where a management device connected to the injection molding machine 10 is used as the production management device will be described.

[0203] Fig. 11 is a diagram illustrating a block configuration of the injection molding machine 10 and the management device 1100 according to this embodiment. As shown in Fig. 11, the injection molding machine 10 and the management device 1100 are connected via a communication network 1150. The communication network 1150 may be, for example, a network within a factory.

[0204] The control device 700 of the injection molding machine 10 transmits log information indicating performance values ​​from various sensors to the management device 1100 using the communication interface 705.

[0205] The management device 1100 includes a CPU 1101, an operation device 1102, a display device 1103, a communication interface 1104, and a bus 1105 that connects these devices together.

[0206] The management device 1100 then receives log information indicating performance values ​​from various sensors from the control device 700 via the communication interface 1104.

[0207] The CPU 1101 executes a program to realize a reception unit 1111, a display control unit 1112, a storage unit 1113, and a calculation unit 1114. The processes performed by the reception unit 1111, the display control unit 1112, the storage unit 1113, and the calculation unit 1114 are similar to those of the reception unit 711, the display control unit 712, the storage unit 713, and the calculation unit 714 in the above-described embodiment and modification examples.

[0208] That is, the management device 1100 according to this embodiment can display the log information screens shown in the above-described embodiment and modified examples by including a reception unit 1111, a display control unit 1112, a storage unit 1113, and a calculation unit 1114. The displayed log information screen and operations on the log information screen are similar to those in the above-described embodiment and modified examples, and therefore will not be described here.

[0209] <effect> In the above-described embodiment and modified example, a record showing the detection result of the first molded product is displayed based on the selection received from the operator, and a record showing the detection result of a molded product molded by the injection molding machine 10 at least one product before the first molded product, and a record showing the detection result of a molded product molded by the injection molding machine 10 at least one product after the first molded product are displayed. This allows the operator to properly grasp the change in the situation according to the time series of the production of the molded product. For example, the operator can grasp whether an abnormality in the molded product is sudden or not. Since the operator can properly grasp the change in the situation, it becomes easier to analyze the cause of the abnormality.

[0210] In the above-described embodiment, the case where the object of management in the production management device is an injection molding machine has been described. However, the above-described embodiment does not limit the production device to be managed to an injection molding machine, and may be applied to, for example, an extrusion molding machine, a blow molding machine, or the like. Furthermore, the embodiment is not limited to a device that processes plastics or the like to mold products, and may be applied to a device that processes metals or the like to produce products. In other words, any production device that can mass-produce products using materials such as plastics or metals can be used for the control shown in the above-described embodiment.

[0211] Although the embodiment of the production management device according to the present invention has been described above, the present invention is not limited to the above embodiment. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. Naturally, these also fall within the technical scope of the present invention. [Explanation of symbols]

[0212] 10 injection molding machine 700 Control device 701 CPU 711 Reception 712 Display control unit 713 Preservation Department 714 Calculation Unit 702 Storage medium 721 Information storage unit 750 Operating device 760 Display device 1100 Management device 1101 CPU 1111 Reception 1112 Display control unit 1113 Preservation Department 1114 Calculation section 1102 Operating device 1103 Display device 1104 Communication Interface

Claims

1. When a plurality of products are produced by the production device, a detection result detected by the detection unit in a process of producing the products is displayed on the display unit; When a selection of the detection result or information identifying the product is received, a control unit configured to display, on the display unit, the detection result of a first product that is detected by the detection result that has been selected or that is identified by the information that has been selected, and to display, on the display unit, the detection result of a second product that was produced by the production device one product before the first product, and the detection result of a third product that was produced by the production device one product after the first product; Equipped with production management equipment.

2. the control unit displays the detection result extracted by a statistical method from the detection result of each of the plurality of products, or the information identifying the product that satisfies a predetermined condition among the plurality of products produced by the production device, When a selection of the extracted detection result or the information is accepted, the detection result of the first product, the detection result of the second product, and the detection result of the third product are displayed on the display unit. The production management device according to claim 1.

3. The detection result extracted by the statistical method is a maximum value or a minimum value. The production management device according to claim 2.

4. The predetermined condition is a criterion for determining whether or not an abnormality has occurred in the product. The production management device according to claim 2.

5. the control unit is configured to, when receiving a selection of a predetermined item into which the detection results are classified, sort and display the products based on the detection results classified into the predetermined item, and to receive a selection of the sorted and displayed detection results. The production management device according to claim 1.

6. the control unit is configured to, when receiving a selection of a predetermined item into which the detection results are classified, filter the detection results classified into the predetermined item under a predetermined condition and display the filtered and displayed detection results, and to receive a selection of the detection results. The production management device according to claim 1.

7. the control unit is configured to, after displaying the detection result for each product in a first display area of ​​the display unit, jump or scroll to display the detection result of the first product, the detection result of the second product, and the detection result of the third product in the first display area when a selection of the detection result or the information is received.

5. The production management device according to claim 1.

8. the control unit is configured, when receiving a selection of the detection result or the information identifying the product, to display a display area separate from a display area displaying the detection result detected by the detection unit in a process of producing the product, and to display the detection result of the first product, the detection result of the second product, and the detection result of the third product in the separate display area.

5. The production management device according to claim 1.

9. the control unit displays the detection result by the detection unit for each of the products when the products are produced over time by injection molding using the injection molding machine.

7. The production management device according to claim 1.

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