Production management device and display device

Abstract

To acquire a state relating to production of products.SOLUTION: A production management device includes a control part for: acquiring information representing an amount of carbon dioxide emissions corresponding to an amount of electric power supplied from each of power generation facilities, any one or more of power generation facilities owned by an electric power company having a contract to supply electric power to a production device and power generation facilities installed for in-house power generation; acquiring information representing a rate of the amount of power supplied from each of the power generation facilities in order to produce products; and calculating an amount of carbon dioxide emissions generated by production of the products based on the rate of the amount of power supplied from each of the power generation facilities and the amount of carbon dioxide emissions corresponding to the amount of power generated from each of the power generation facilities.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] Conventionally, when a product is produced by a production device, there is a tendency to require consideration of production costs, etc. For example, in order to suppress demand power, a technology has been proposed in which an operation mode is prepared for changing the power supply source that drives each device of an injection molding machine (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-50814 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in recent years, companies are being asked to consider not only production costs but also environmental measures with the goal of creating a sustainable society. For example, in the manufacturing industry, as part of efforts to combat global warming, there is a trend toward requiring companies to visualize the amount of carbon dioxide emissions generated in the production of their products and to publicly announce their efforts to realize a low-carbon society.

[0005] In this case, it is preferable to calculate the amount of carbon dioxide emissions using a specific method corresponding to the power generation method of the electric power supplier or the facility installed for private power generation, rather than using a general method. In other words, electric power suppliers and facilities for private power generation are also making efforts to reduce carbon dioxide emissions in order to realize a low-carbon society. For this reason, it is required that the amount of carbon dioxide emissions generated in the production of products be visualized taking into account the corporate efforts of the electric power supplier or the manufacturer of the facility.

[0006] One aspect of the present invention provides a technology that allows one to grasp the status of product production by calculating the amount of carbon dioxide emissions generated by the production of products, taking into account the amount of carbon dioxide emissions generated by power generation from one or more of the power generation facilities owned by an electric power utility and power generation facilities installed for private power generation. [Means for solving the problem]

[0007] A production management device according to one embodiment of the present invention includes a control unit configured to acquire information indicating the amount of carbon dioxide emissions corresponding to the amount of electricity supplied from each of the power generation facilities, for one or more of the power generation facilities owned by an electric utility that has a contract to supply electricity to a production device, and the power generation facilities installed for private power generation, acquire information indicating the proportion of the amount of electricity supplied from each of the power generation facilities to produce a product by the production device, and calculate the amount of carbon dioxide emissions generated by the production of the product based on the amount of electricity used to produce the product, the proportion of the amount of electricity supplied from each of the power generation facilities, and the amount of carbon dioxide emissions corresponding to the amount of electricity generated from each of the power generation facilities. Effect of the Invention

[0008] According to one aspect of the present invention, a technique is provided for understanding the status of product production by calculating the amount of carbon dioxide emissions generated by the production of the product. [Brief description of the drawings]

[0009] [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 conceptual diagram showing the relationship between a production company having an injection molding machine and an electric power company that supplies electric power according to the first embodiment. [Figure 4]FIG. 4 is a functional block diagram showing components of the control device for the injection molding machine according to the first embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a power generation facility setting screen output by the display control unit according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating a log information screen output by the display control unit according to the first embodiment. [Figure 7] FIG. 7 is a diagram illustrating a power consumption and other display screen output by the display control unit according to the first embodiment. [Figure 8] FIG. 8 is a conceptual diagram showing the relationship between a production company having a production device and an electric power company that supplies electric power according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 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.

[0011] 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.

[0012] 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.

[0013] (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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] (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.

[0048] 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).

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] (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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 die.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] (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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] (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.

[0090] 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."

[0091] 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.

[0092] 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.

[0093] 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, pressure release step, mold opening step, and ejection step.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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).

[0098] (First embodiment) Next, the relationship between a manufacturing company having a production device and an electric power supplier that supplies electric power will be described. Fig. 3 is a conceptual diagram showing the relationship between a manufacturing company 1000 having an injection molding machine 10 and an electric power supplier 1300 that supplies electric power according to this embodiment. In the example shown in Fig. 3, the manufacturing company owns the injection molding machine 10 as a production device.

[0099] In this embodiment, the production company 1000 has a contract with the electricity company 1300, and can therefore receive a supply of electricity from the electricity company 1300. In this embodiment, the electricity company 1300 is referred to as XX Electric Power Co., Ltd., and an example will be described in which the electricity company 1300 performs operations from power generation to transmission and retail of electricity. However, this embodiment is not limited to this configuration, and as long as the production company 1000 can grasp information related to power generation, the power generation, transmission and retail of electricity may each be performed by separate companies.

[0100] In this embodiment, a case will be described in which the production company 1000 has a contract with the electric power company 1300, but the production company 1000 may have contracts with a plurality of electric power companies in order to receive a supply of electric power.

[0101] 3, the electric utility 1300 includes a head office 1301, an AA thermal power plant 1302, a BB hydroelectric power plant 1303, and a CC solar power plant 1304. This embodiment shows an example of power generation facilities supplied by the electric utility 1300, and may be other power generation facilities such as thermoelectric power generation or geothermal power generation.

[0102] The head office 1301 is communicably connected to the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304. This allows the head office 1301 to grasp the status of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304. For example, the head office 1301 can grasp the amount of power generated by each power generation facility and the amount of carbon dioxide emissions caused by power generation.

[0103] The head office 1301 also includes a server 1305 for providing current power information based on the status of the power generation facilities.

[0104] The server 1305 is connected to a public network to which an external device can be connected. The server 1305 publishes information about power generation facilities owned by the electric utility 1300. An example of information provided by the server 1305 is shown below. Note that this embodiment does not limit the information provided by the server 1305, and other information may be published.

[0105] Specifically, the server 1305 provides information indicating the proportion of the amount of electricity generated by each of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304 in relation to the amount of electricity provided by the electric utility company 1300.

[0106] Furthermore, the server 1305 provides information indicating the amount of carbon dioxide emission corresponding to the amount of power generated for each of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304.

[0107] 3, the manufacturing company 1000 includes a management device 1100, a plurality of injection molding machines 10, and a pulverizer 15. The management device 1100, each of the plurality of injection molding machines 10, and the pulverizer 15 are connected by communication lines.

[0108] Furthermore, the production company 1000 may be provided with a solar power generation facility 1060 for private power generation.

[0109] The management device 1100 is used to manage the molding of molded products by the injection molding machine 10. For example, the management device 1100 manages information transmitted from a plurality of injection molding machines 10, a pulverizer 15, and the like.

[0110] Furthermore, in the case where the solar power generation facility 1060 is provided in the production company 1000, the management device 1100 may hold information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by the solar power generation facility 1060. The amount of carbon dioxide emission corresponding to the amount of power generated by the solar power generation facility 1060 may be, for example, information (e.g., catalog information) provided by the company that provided the solar power generation facility 1060 to the production company 1000. The amount of carbon dioxide emission corresponding to the amount of power generated by the solar power generation facility 1060 may be calculated based on the amount of carbon dioxide emission required for the production of the solar power generation facility 1060 and the amount of power that can be generated within the predicted life of the solar power generation facility 1060. The management device 1100 may transmit information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by the solar power generation facility 1060 to the injection molding machine 10.

[0111] The crusher 15 is used to crush runners and the like generated during molding by the injection molding machine 10.

[0112] Further, each of the multiple injection molding machines 10 is connected to a mold temperature regulator 11, a take-out robot 12, and a dryer 13 so as to be able to communicate with each other.

[0113] The mold temperature regulator 11 is used to adjust the temperature of the mold device 800 of the injection molding machine 10 in accordance with a request from the injection molding machine 10. The take-out robot 12 is used to take out a molded article or the like molded by the injection molding machine 10 in accordance with a request from the injection molding machine 10. The dryer 13 is used to dry the molded article molded by the injection molding machine 10 in accordance with a request from the injection molding machine 10.

[0114] The injection molding machine 10 according to this embodiment is configured to be able to calculate the amount of carbon dioxide emissions generated during molding of a molded product (one example of production) and display the calculated amount of emissions.

[0115] In order to display the amount of carbon dioxide emissions, in addition to the amount of electricity used by the injection molding machine 10, it is necessary to set information indicating the proportion of the amount of electricity generated by each of the power generation facilities (AA thermal power plant 1302, BB hydroelectric power plant 1303, CC solar power plant 1304, and solar power generation facility 1060) for the amount of electricity provided by the electric utility company 1300, and information indicating the amount of carbon dioxide emissions corresponding to the amount of electricity generated by each of the power generation facilities.

[0116] Therefore, the worker 1050 according to this embodiment accesses the server 1305 with the mobile communication terminal 1051 and checks the information published on the server 1305. Then, based on the information published on the server 1305 and information on the solar power generation facility 1060 installed for private power generation, the worker 1050 sets, for the injection molding machine 10, information indicating the ratio of the amount of power generated by each of the power generation facilities (the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304) and information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by each of the power generation facilities.

[0117] The worker 1050 is not limited to a method of setting information for the injection molding machine 10. For example, the worker 1050 may input, to the management device 1100, information indicating the ratio of the amount of power generated by each of the power generation facilities (the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304) and information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by each of the power generation facilities. Then, the management device 1100 transmits the input information to each of the injection molding machines 10. As a result, the control device 700 of the injection molding machine 10 may set information indicating the ratio of the amount of power generated by each of the power generation facilities (the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304) and information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by each of the power generation facilities.

[0118] FIG. 4 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. 4 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 and 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. 4, the CPU 701 of the control device 700 includes a receiving unit 711, a display control unit 712, a storage unit 713, an acquisition unit 714, and a calculation unit 715. The control device 700 also includes a discharge amount information storage unit 721, a ratio information storage unit 722, and a log information storage unit 723 in the storage medium 702.

[0119] The emission information storage unit 721 stores emission information indicating the amount of carbon dioxide emission corresponding to the amount of electric power generated by each power generation facility (name of the power generation facility) that supplies power to the injection molding machine 10. The emission information may be information transmitted from the management device 1100 or information input by the worker 1050. The emission information may be an emission coefficient for multiplying the amount of electric power to derive the amount of emission, or any information capable of deriving the amount of emission, such as a conversion formula for deriving the amount of carbon dioxide emission.

[0120] The information on the amount of carbon dioxide emissions according to the amount of electricity generated by the power generation equipment of the electric power utility is information provided by the electric power utility for each power generation equipment. Also, the information on the amount of carbon dioxide emissions according to the amount of electricity generated by the power generation equipment installed for private power generation is information (e.g., catalog information) provided by the business that provided the power generation equipment to the production business 1000. In this way, since the emission information is information provided specifically for each power generation equipment, the specific amount of carbon dioxide emissions can be calculated.

[0121] The ratio information storage unit 722 stores ratio information indicating the ratio of the amount of electric power supplied from each of the power generation facilities to mold a molded product by the injection molding machine 10. The ratio information may be information transmitted from the management device 1100 or may be information input by the operator 1050.

[0122] The log information storage unit 723 stores log information indicating performance values ​​that are detection results by various sensors (an example of a detection unit).

[0123] 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 mobile communication terminal 1051 connected via a network.

[0124] The reception unit 711 receives an operation from the operator via the input interface 703 and the touch panel 770 .

[0125] The storage unit 713 stores various information in the storage medium 702. For example, the storage unit 713 stores actual results and statistical values ​​during molding as log information in the log information storage unit 723. An operation for saving the log information is performed on a log information screen displayed by the display control unit 712. Specific operations will be described later.

[0126] The acquisition unit 714 acquires detection results from various sensors provided in the injection molding machine 10. For example, the acquisition unit 714 acquires the amount of power consumed by the injection molding machine 10.

[0127] The calculation unit 715 calculates values ​​to be displayed on the screen based on performance values ​​from various sensors.

[0128] In this embodiment, the ratio of the amount of electric power supplied from each of the power generation facilities, which is used to calculate the amount of carbon dioxide emission, may be input by the operator 1050. Here, a screen for setting the ratio of the amount of electric power, which is displayed on the display device 760 of this embodiment, will be described.

[0129] FIG. 5 is a diagram illustrating an example of a power generation facility setting screen output by the display control unit 712 according to this embodiment.

[0130] The power generation equipment setting screen (an example of a first screen) shown in FIG. 5 is an example of a screen for accepting input of information regarding the proportion of electricity supplied from each of the power generation equipment owned by the electric power supplier 1300 that has a contract to supply power to the injection molding machine 10 and any one or more of the power generation equipment (solar power generation equipment 1060) installed for private power generation.

[0131] On the power generation facility setting screen 1500 shown in FIG. 5, name columns 1501, 1502, 1503, and 1504, ratio columns 1511, 1512, 1513, and 1514, an add row button 1505, and a setting button 1521 are displayed.

[0132] In the power generation facility setting screen 1500 shown in FIG. 5, every time the reception unit 711 receives a press of the add line button 1505, the display control unit 712 performs display by adding one name column and one ratio column.

[0133] 5, it is assumed that the reception unit 711 receives four presses of the add row button 1505. After that, the reception unit 711 receives input of the names of four power generation facilities (for example, "AA thermal power plant (XX)", "BB hydroelectric power plant (XX)", "CC solar power plant (XX)", and "solar power plant (in-house)").

[0134] The name field according to this embodiment is, for example, a pull-down menu, and can accept a selection from the names of power generation facilities stored in the emission information storage unit 721 in association with the emission information.

[0135] The name of the new power generation facility may be entered in the name field. In this case, the amount of carbon dioxide emission corresponding to the amount of power generated by the power generation facility is entered. As a result, the saving unit 713 stores the name of the power generation facility and the emission information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by the power generation facility in the emission information storage unit 721 in association with each other.

[0136] The operator inputs the percentage of the amount of power generated for each power generation facility in the percentage field while referring to the information provided by the server 1305. In response to this, the reception unit 711 receives, from the percentage field, an input of the percentage of the amount of power supplied from each of the power generation facilities selected in the name field. This makes it possible to associate the percentage of the amount of power generated for each power generation facility. Note that this embodiment shows an example of receiving an input of a percentage as an example of a method for receiving an input of a percentage, but the input is not limited to a percentage, and any information that can be recognized and understood may be used.

[0137] In the example shown in FIG. 5, the system is set so that "AA thermal power plant (XX)" generates "60%", "BB hydroelectric power plant (XX)" generates "20%", "CC solar power plant (XX)" generates "10%", and "solar power generation (in-house)" generates "10%".

[0138] Then, when the reception unit 711 receives a press of the setting button 1521, the storage unit 713 associates the power generation facility with the power amount ratio input for that power generation facility based on the input in the name field and the ratio field, and stores the association information in the ratio information storage unit 722. This makes it possible to identify the ratio of the power amount supplied from each power generation facility.

[0139] As described above, the control device 700 according to this embodiment displays, on the display device 760, a power generation facility setting screen (an example of a first screen) 1500 capable of receiving input of information regarding the proportion of the amount of electric power supplied from each of the power generation facilities, for one or more of the power generation facilities owned by the electric utility contracted to supply electric power to the injection molding machine 10 and the power generation facilities provided for private power generation. This allows the injection molding machine 10 to grasp the proportion of the amount of electric power used for each power generation facility to mold a molded product.

[0140] In the power generation facility setting screen 1500 according to the present embodiment, an example will be described in which power generation facilities owned by the electric utility 1300, XX Electric Power Co., Inc., and power generation facilities provided for private power generation can be selected, but this is not intended to limit the power generation facilities to be selected. For example, if there are contracts with multiple electric utility companies, power generation facilities owned by each of the multiple electric utility companies can be selected.

[0141] After that, in the injection molding machine 10, when molding of a molded product is started, the acquisition unit 714 acquires the amount of power supplied to mold the molded product each time the molded product is molded, which makes it possible to calculate the amount of carbon dioxide emissions.

[0142] When calculating the carbon dioxide emission amount, the calculation unit 715 acquires information indicating the carbon dioxide emission amount corresponding to the amount of power supplied from each of the power generation facilities from the emission amount information storage unit 721. Furthermore, the calculation unit 715 acquires information indicating the ratio of the amount of power supplied from each of the power generation facilities from the ratio information storage unit 722.

[0143] Then, the calculation unit 715 calculates the amount of carbon dioxide emission generated for molding the molded product based on the amount of power supplied to the injection molding machine 10 for molding the molded product, information indicating the amount of carbon dioxide emission corresponding to the amount of power supplied from each of the power generation facilities, and information indicating the ratio of the amount of power supplied from each of the power generation facilities. The calculated amount of carbon dioxide emission may be displayed on a log information screen or the like. The log information screen is a screen for displaying actual values ​​and statistical values ​​during molding.

[0144] FIG. 6 is a diagram illustrating a log information screen output by the display control unit 712 according to the present embodiment.

[0145] The log information screen 1600 shown in FIG. 6 displays a total number 1611, a number of good items 1612, a number of defective items 1613, a number of rejected items 1614, a logging button 1615, a monitoring settings button 1616, a save button 1617, an update button 1618, a statistics list 1620, and a performance list 1630.

[0146] The statistics list 1620 shows statistical information (for example, average, range, maximum, minimum, standard deviation) for each of the setting fields 1621 to 1627. The contents shown in the setting fields 1621 to 1627 can be set by the operator. In this embodiment, it is possible to display, monitor, and save log information for the items shown in the setting fields 1621 to 1627. Note that monitoring in this embodiment refers to judging whether or not an item is non-defective based on a predetermined standard.

[0147] 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 1621 to 1627 in the statistics list 1620. 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 1621 to 1627, and may be other items.

[0148] The calculation unit 715 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 1630. Then, the display control unit 712 displays the statistical information calculated by the calculation unit 715 in the statistics list 1620.

[0149] The "Monitoring", "Monitoring value", and "Range" in the statistics list 1620 are information for determining whether or not the molded product in the corresponding setting field is defective.

[0150] When monitoring in the statistics list 1620 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 in the "range" with the "monitoring value" as the median). The monitoring can be switched by the monitoring setting button 1616.

[0151] The "Defective" section of the statistics table 1620 indicates the number of molded articles that do not meet the criteria indicated by the "Monitoring Value" and "Range."

[0152] The "Cycle Time" in setting field 1621, the "Filling Time" in setting field 1622, and the "Weighing Time" in setting field 1623 are items set to monitor the time required for the cycle, filling, and metering.

[0153] The "VP switching position" in the setting field 1624 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 1625 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 1626 is an item set to monitor the peak value of the pressure when the molding material is filled.

[0154] The "CO2 emission amount" in the setting field 1627 is an item set for monitoring the amount of carbon dioxide emitted each time a molded product is molded.

[0155] The setting fields 1621 to 1627 can be changed to items that the operator wishes to monitor. A method for changing the items will not be described here.

[0156] The result list 1630 shows a list of setting information (e.g., set values) for the items set in the setting fields 1621 to 1627 or result values ​​measured by various sensors for each shot. The items set in the setting fields 1621 to 1627 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.

[0157] The logging button 1615 is a button for accepting a selection of whether or not to save the performance values ​​shown in the performance list 1630 as log information. When the logging button 1615 is pressed (displays "DATA LOGGING ON"), the saving unit 713 saves the information shown in the performance list 1630 (for example, performance values ​​from various sensors) and the like in the log information storage unit 723 as log information.

[0158] That is, in this embodiment, the amount of carbon dioxide emitted each time a molded product is molded can be stored in the log information storage unit 723 as log information.

[0159] The monitoring setting button 1616 is a button for accepting whether or not to monitor according to the monitoring items in the statistics list 1620. When the monitoring setting button 1616 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 1616 is pressed, it becomes possible to switch monitoring for each of the setting fields 1621 to 1627 in the statistics list 1620 to "Off" or "On".

[0160] The save button 1617 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 1621 to 1627. When the save button 1617 is pressed, the save unit 713 saves the statistical values ​​for each of the setting fields 1621 to 1627 and the performance values ​​shown in the performance list 1630 in the log information storage unit 723 as log information. In this embodiment, an example of saving the statistical values ​​and the performance values ​​will be described, but the present invention is not limited to saving the statistical values ​​and the performance values. For example, when a setting is shown in the performance list 1630, the save unit 713 may save the setting value together. Furthermore, even if the setting value is not shown in the performance list 1630, the save unit 713 may save the setting value in association with the performance value shown in the performance list 1630.

[0161] The update button 1618 is a button for accepting whether or not to update the statistics list 1620 and the performance list 1630 every time injection molding is completed by the injection molding machine 10. When the update button 1618 is pressed (displays "Always"), the statistics list 1620 and the performance list 1630 are updated every time injection molding is completed by the injection molding machine 10.

[0162] Total number 1611 indicates the number of molded products molded by the injection molding machine 10. Number of good products 1612 indicates the number of molded products determined to be good products based on "Monitoring", "Monitoring value", and "Range". Number of defective products 1613 indicates the number of molded products determined to be defective products based on "Monitoring", "Monitoring value", and "Range". Number of rejected products 1614 indicates the number of rejected molded products.

[0163] As described above, when multiple 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, actual values ​​(an example of detection results) detected by various sensors in the process of producing the molded products in the actual results list 1630 of the display device 760.

[0164] In the result list 1630, "CH7" corresponds to "CO2 emission amount." That is, in the "CH7" column of the result list 1630, the calculation result of the carbon dioxide emission amount calculated by the calculation unit 715 for each shot is displayed as a result value.

[0165] This allows the worker 1050 to monitor the amount of carbon dioxide emitted each time a molded product is molded.

[0166] Furthermore, when the logging button 1615 is pressed, the saving unit 713 saves the information shown in the performance list 1630 (for example, performance values ​​from various sensors) as log information in the log information storage unit 723, so that the amount of carbon dioxide emission generated each time a molded product is molded is saved as log information in the log information storage unit 723. Therefore, the amount of carbon dioxide emission generated when molding each molded product can be managed for each molded product.

[0167] In this embodiment, the log information including the amount of carbon dioxide emission is stored in the log information storage unit 723 by the storage unit 713. The amount of carbon dioxide emission stored in the log information may be displayed on another screen.

[0168] In this embodiment, the log information screen (an example of the second screen) 1600 has been described as a screen that displays the calculation results of the amount of carbon dioxide emission generated by molding a molded product by the injection molding machine 10. However, in this embodiment, the screen that displays the calculation results of the amount of carbon dioxide emission is not limited to the log information screen 1600, and any screen may be used as long as it is capable of displaying the calculation results of the amount of carbon dioxide emission.

[0169] For example, the amount of carbon dioxide emissions may be displayed on the screen not for each molded product, but for each lot in which the molded products are molded.

[0170] Furthermore, in this embodiment, the amount of carbon dioxide emissions per molded product calculated by calculation unit 715 is not limited to being based on the amount of electricity consumed by injection molding machine 10, but may also include the amount of electricity consumed by external devices other than injection molding machine 10 when molding the molded product.

[0171] For example, the acquisition unit 714 of the control device 700 may acquire the amount of power used to adjust the temperature of the mold device 800 from the mold temperature regulator 11 via the communication interface 705. The acquisition unit 714 of the control device 700 may also acquire the amount of power used for removing the molded product, etc. from the take-out robot 12 via the communication interface 705. Furthermore, the acquisition unit 714 of the control device 700 may acquire the amount of power required to dry the molded product from the dryer 13 via the communication interface 705.

[0172] Furthermore, the acquiring unit 714 of the control device 700 may acquire from the crusher 15 the amount of electricity required to crush runners and the like that are generated each time a molded product is molded.

[0173] When the amount of power consumed by the external device is acquired, the calculation unit 715 may calculate the amount of carbon dioxide emission corresponding to the amount of power consumed by the external device each time a molded product is molded based on the amount of power consumed by the external device. When the external device is used across multiple shots, the calculation unit 715 may perform a calculation so that the amount of carbon dioxide emission corresponding to the amount of power consumed by the external device is divided equally among the multiple shots, or may allocate the amount to each shot by a predetermined method.

[0174] The storage unit 713 may store the amount of carbon dioxide emission caused by the use of the external device for each molded product as log information. In addition, when power is consumed by the external device while a molded product is not being molded, the acquisition unit 714 may acquire the amount of power consumed by the external device, and the storage unit 713 may store the acquired amount of power as log information. Furthermore, the amount of carbon dioxide emission caused by the use of the external device may be displayed on a screen.

[0175] Fig. 7 is a diagram illustrating a power consumption display screen output by the display control unit 712 according to this embodiment. The power consumption display screen shown in Fig. 7 displays the power consumption for 30 days and the amount of carbon dioxide emission for 30 days. The power consumption shown in Fig. 7 represents the power consumption when the injection molding machine 10 is operating and the power consumption when the injection molding machine 10 is on standby.

[0176] Specifically, the motor column shows the power consumption of various motors of the injection molding machine 10 in operation and the power consumption of various motors of the injection molding machine 10 in standby. The heater, etc. column shows the total power consumption of external devices (mold temperature regulator 11, take-out robot 12, dryer 13, and pulverizer 15) when the injection molding machine 10 is in operation and the total power consumption of external devices when the injection molding machine 10 is in standby.

[0177] The CO2 emissions shown in Fig. 7 are shown in a motor column and a heater column. The motor column shows the carbon dioxide emissions of various motors of the injection molding machine 10. The heater column shows the carbon dioxide emissions of external devices of the injection molding machine 10. The carbon dioxide emissions shown in each of the motor column and heater column are the total of the carbon dioxide emissions when the injection molding machine 10 is in operation and the carbon dioxide emissions when the injection molding machine 10 is on standby, but the amounts of carbon dioxide emissions when on standby and when in operation may be shown separately, as with power consumption.

[0178] In the present embodiment, an example has been described in which the control device 700 of the injection molding machine 10 calculates the amount of carbon dioxide emission and stores the amount of emission as log information. However, the present embodiment is not limited to an example in which the control device 700 of the injection molding machine 10 functions as a production management device that calculates and manages the amount of carbon dioxide emission.

[0179] For example, the management device 1100 may have a configuration similar to that of the control device 700 described above, and may receive information from the injection molding machine 10 regarding the amount of electricity used each time a molded product is molded, thereby calculating the amount of carbon dioxide emission for each injection molding machine 10 and storing the amount of carbon dioxide emission in a storage medium (not shown). Furthermore, the management device 1100 may display the amount of carbon dioxide emission. The specific method may be the same as the method described above, and a description thereof will be omitted.

[0180] In this manner, the production management device that calculates and manages the amount of carbon dioxide emissions may be provided in the injection molding machine 10, or may be provided as an external device of the injection molding machine 10.

[0181] Furthermore, the calculation result of the carbon dioxide emission amount is not limited to being displayed on the display device 760 of the injection molding machine 10. For example, the control device 700 of the injection molding machine 10 may calculate the carbon dioxide emission amount and transmit the calculation result of the carbon dioxide emission amount to the mobile communication terminal 1051 or the management device 1100. As a result, the mobile communication terminal 1051 or the management device 1100 may display the calculation result of the carbon dioxide emission amount.

[0182] Second embodiment In the first embodiment, an example has been described in which an operator inputs information related to the ratio to a power generation facility setting screen, etc. However, the above-described embodiment is not limited to an example in which an operator inputs information related to the ratio to a power generation facility setting screen, etc. Therefore, in the second embodiment, an example will be described in which the server 1305 provides information related to the power generation facility to the management device 1100.

[0183] Fig. 8 is a conceptual diagram showing the relationship between a production company 1000 having a production device and an electric power company 1300 that supplies electric power according to the second embodiment. In the conceptual diagram shown in Fig. 8, the same reference numerals are assigned to the same configurations as in Fig. 3, and the description thereof will be omitted.

[0184] In the example shown in FIG. 8, a head office 1301 is provided with a server 1305A for providing current power information as an electric utility 1300.

[0185] The server 1305A is connected to a public network 1850. The server 1305A then transmits information about power plants owned by the electric utility 1300 via the public network 1850.

[0186] For example, the server 1305A transmits emission information indicating the amount of carbon dioxide emissions corresponding to the amount of electricity generated for each of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304 to an external device (e.g., the management device 1100A) connected via the public network 1850.

[0187] Furthermore, the server 1305A transmits percentage information indicating the proportion of the amount of electricity generated by each of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304 to an external device (e.g., the management device 1100A) connected via the public network 1850.

[0188] The server 1305A may transmit information indicating the ratio of the amount of power when the ratio of the amount of power is changed. For example, when the amount of power generated by the CC solar power plant 1304 changes due to a change in weather, the server 1305A may transmit information indicating the ratio of the amount of power that takes into account the change in the amount of power generated.

[0189] In the example shown in FIG. 8, the manufacturer 1000 includes a management device 1100A.

[0190] The management device 1100A receives information from the server 1305A via the public network 1850.

[0191] For example, when the management device 1100A receives from the server 1305A emission information indicating the amount of carbon dioxide emission corresponding to the amount of electricity generated for each of the AA thermal power plant 1302, the BB hydroelectric power plant 1303, and the CC solar power plant 1304, the management device 1100A transmits the emission information to the injection molding machine 10.

[0192] The control device 700 of the injection molding machine 10 receives emission information indicating the amount of carbon dioxide emission corresponding to the amount of power generated by the power generation facility from the management device (an example of an information processing device) 1100A via the communication interface (an example of a communication unit) 705. Then, the storage unit 713 stores the received information in the emission information storage unit 721.

[0193] After receiving the emission information, the calculation unit 715 switches so as to calculate the amount of carbon dioxide emission generated by molding the molded product by the injection molding machine 10, based on the emission information stored in the emission amount information storage unit 721.

[0194] As another example, when the management device 1100A receives ratio information from the server 1305A, it derives ratio information indicating the ratio of the amount of electricity generated by each of the power generation facilities including the solar power generation facility 1060, taking into account the amount of electricity generated by the solar power generation facility 1060 installed for private power generation, and transmits the derived ratio information to the injection molding machine 10.

[0195] The control device 700 of the injection molding machine 10 receives ratio information indicating the ratio of the amount of power generated by each of the power generation facilities from the management device 1100A via the communication interface (an example of a communication unit) 705. The storage unit 713 stores the received ratio information in the ratio information storage unit 722.

[0196] After receiving the ratio information, the calculation unit 715 switches so as to calculate the amount of carbon dioxide emissions generated by molding the molded product by the injection molding machine 10 based on the ratio information stored in the ratio information storage unit 722 .

[0197] In this embodiment, when the ratio of the amount of power generated by the power generation facility changes, the carbon dioxide emission amount can be calculated according to the change by the above-mentioned control, and therefore the accuracy of the calculation of the carbon dioxide emission amount can be improved.

[0198] Furthermore, any one or more of the emission information and the ratio information described above is not limited to being managed by the injection molding machine 10. For example, the management device 1100A may manage them. The control device 700 may acquire (receive) any one or more of the emission information and the ratio information from the management device 1100A at the timing of calculating the amount of carbon dioxide emission.

[0199] In this embodiment, the control device 700 is not limited to a method of calculating the amount of carbon dioxide emission based on information stored in the storage medium 702, and the calculation and management of the amount of carbon dioxide emission may be performed by an external system. As the external system, a cloud service that implements an emission calculation conforming to the GHG Protocol, an international emission calculation standard, or Partnership for Carbon Accounting Financials (PCAF), a manufacturing execution system, or a quality control system may function as a production management device.

[0200] Also, the carbon dioxide emission amount is calculated by the injection molding machine 10, but an external system may manage one or more of the emission information and the ratio information. In this case, the control device 700 of the injection molding machine 10 receives one or more of the emission information and the ratio information from the external system when calculating the carbon dioxide emission amount.

[0201] Similarly, when the management device 1100A calculates the carbon dioxide emission amount, an external system may manage any one or more of the emission information and the ratio information. In this case, the management device 1100A receives any one or more of the emission information and the ratio information from the external system when calculating the carbon dioxide emission amount.

[0202] <effect> In the above-described embodiment, when the injection molding machine 10 molds a molded product, the production management device such as the control device 700 calculates the amount of carbon dioxide emissions generated by the production of the product, taking into account the amount of carbon dioxide emissions generated by power generation from one or more of the power generation facilities owned by the electric utility and the power generation facilities installed for private power generation, thereby making it possible to grasp the situation regarding the production of the product. In other words, the amount of carbon dioxide emissions generated by the molding of a molded product by the injection molding machine 10 can be visualized. Therefore, it becomes possible to publicize efforts toward the realization of a low-carbon society, etc.

[0203] In the above-described embodiment, the case where the production device for managing the amount of carbon dioxide emissions is an injection molding machine has been described. However, the above-described embodiment does not limit the production device for managing the amount of carbon dioxide emissions to an injection molding machine, and may be applied to, for example, an extrusion molding machine or a blow molding machine. 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.

[0204] Although the embodiments of the production management device and the display device according to the present invention have been described above, the present invention is not limited to the above-mentioned embodiments. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. These naturally fall within the technical scope of the present invention. [Explanation of symbols]

[0205] 10 injection molding machine 700 Control device 701 CPU 711 Reception 712 Display control unit 713 Preservation Department 714 Acquisition Department 715 Calculation Department 702 Storage medium 721 Emission information storage unit 722 Ratio information storage unit 723 Log information storage unit 750 Operating device 760 Display device 1000 producers 1060 Solar power generation equipment 1100 Management device 1300 Electricity Providers 1301 Head Office 1302 AA Thermal Power Plant 1303 BB Hydroelectric Power Plant 1304 CC Solar Power Plant 1305 Server

Claims

1. Obtaining information indicating the amount of carbon dioxide emissions corresponding to the amount of electricity supplied from each of power generation facilities owned by an electric utility contracted to supply electricity to the production equipment and power generation facilities installed for private power generation, and acquiring information indicating a ratio of an amount of electricity supplied from each of the power generation facilities to the production device for producing a product; a control unit configured to calculate an amount of carbon dioxide emissions generated by the production of the product based on an amount of electricity used to produce the product, a ratio of the amount of electricity supplied from each of the power generation facilities, and an amount of carbon dioxide emissions corresponding to the amount of electricity generated from each of the power generation facilities; Equipped with production management equipment.

2. The control unit acquires an amount of power consumed by an external device other than the production device when producing the product, The amount of carbon dioxide emissions generated by the production of the product is calculated by further using the amount of electricity consumed by the external device. The production management device according to claim 1.

3. The amount of carbon dioxide emissions corresponding to the amount of electricity generated from each of the power generation facilities is based on at least one of information provided by a business operator that manufactured the power generation facilities installed for private power generation, and information provided by the electric utility for each of the power generation facilities owned by the electric utility. The production management device according to claim 1.

4. the control unit receives an input of information regarding a ratio of the amount of electric power supplied from each of the power generation facilities, and identifies a ratio of the amount of electric power supplied from each of the power generation facilities based on the received input information. The production management device according to claim 1.

5. A communication unit for communicating with an information processing device provided by the electric utility company is further provided, the control unit receives information indicating an amount of carbon dioxide emission corresponding to an amount of electric power generated from the power generation facility provided by the electric utility from the information processing device via the communication unit, when receiving information indicating the amount of carbon dioxide emission corresponding to the amount of electricity, switching to calculate the amount of carbon dioxide emission generated by the production of the product based on the received information; The production management device according to claim 1.

6. A communication unit for communicating with an information processing device provided by the electric utility company is further provided, the control unit receives information indicating a ratio of an amount of electric power generated by each of the power generation facilities owned by the electric utility from the information processing device via the communication unit; when receiving information indicating the ratio of the amount of electricity, switching to calculate the amount of carbon dioxide emissions generated by the production of the product based on the received information; The production management device according to claim 1.

7. displaying a first screen capable of receiving input of information regarding the ratio of the amount of electricity supplied from each of at least one of power generation facilities owned by an electric utility contracted to supply power to the production device and power generation facilities provided for private power generation; a display unit that displays, as a second screen, a calculation result of the amount of carbon dioxide emissions generated by the production of the product based on information indicating the amount of electricity used by the production device to produce the product, the amount of carbon dioxide emissions corresponding to the amount of electricity generated by each of the power generation facilities, and information indicating the ratio of the amount of electricity inputted from the first screen; A display device comprising:

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