Injection molding machine

Abstract

To suppress a molding defect caused by a long detention time of a molding material in a cylinder during heating.SOLUTION: An injection molding machine comprises a heating cylinder and a control unit. The heating cylinder is connected to a cavity space formed in a mold device, and melts a molding material to mold a molded product in the cavity space. The control unit controls temperature rise of the heating cylinder based on a temperature of the mold device.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to an injection molding machine. [Background technology]

[0002] Conventionally, techniques have been proposed for starting work at a specified time in an injection molding machine. For example, Patent Document 1 proposes a technique for setting the temperature of the cylinder of an injection molding machine continuously from operation setting, through cylinder warming, to the resin purge temperature, thereby automating the operation and shortening the setup time, thereby improving production efficiency.

[0003] Specifically, the operation start date and time are set, and the temperature for keeping the cylinder warm is set. After the cylinder reaches the warming temperature, the temperature gradient up to the resin purging is set. This allows the temperature to reach the resin purging temperature.

[0004] As another example, Patent Document 2 proposes a technology for controlling the power supply on and off based on a calendar timer. Specifically, the system is constantly operated by a secondary power supply consisting of a solar panel and a storage battery, and when the set time arrives, the relay coil turns on, supplying power from the commercial power supply and starting temperature control of the heating cylinder. This allows the molding operation to start at the start time of the day. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 07-176083 [Patent Document 2] Japanese Patent Application Publication No. 07-024892 Summary of the Invention [Problem to be solved by the invention]

[0006] In the technology disclosed in Patent Document 1 and Cited Document 2, if the cylinder is heated to a target temperature corresponding to the molding material and then continues to be maintained at that target temperature, molding defects such as scorching may occur due to the molding material remaining in the cylinder for a long period of time.

[0007] For example, in an injection molding machine, it is necessary to heat not only the cylinder but also the mold unit. There are cases where the temperature of the mold unit is raised slower than that of the cylinder. In such a case, after the molding material in the cylinder reaches the target temperature, it takes a long time for the mold unit to reach the target temperature, which may cause molding defects such as scorching due to the accumulation of molding material in the cylinder.

[0008] Another example is a case where multiple types of molding materials are used in an injection molding machine. In this case, different molding materials are supplied to each cylinder of the injection device. Since the target temperature for heating is different for each molding material, when heating of multiple cylinders starts at the same time, a situation occurs in which even if the target temperature corresponding to the molding material supplied to one cylinder is reached, the target temperature corresponding to the molding material supplied to the other cylinder is not reached. In such a situation, when the target temperature of the other molding material is reached, one molding material continues to remain, and molding defects such as scorching due to the retention may occur.

[0009] One aspect of the present invention provides a technique for preventing molding defects caused by a long residence time of a molding material in a cylinder during heating. [Means for solving the problem]

[0010] An injection molding machine according to one aspect of the present invention comprises: a first heating cylinder connected to a first cavity space among a plurality of cavity spaces formed in a mold device and melting a first molding material to mold a molded product in the first cavity space; and a second heating cylinder connected to a second cavity space among the plurality of cavity spaces formed in the mold device and melting a second molding material to mold a molded product in the second cavity space; Based on the temperature of the mold assembly, The temperature rise timing of the first heating cylinder and the temperature rise timing of the second heating cylinder And Individual and a control unit that controls the An injection molding machine according to one embodiment of the present invention includes a first heating cylinder connected to a first cavity space among a plurality of cavity spaces formed in a mold device and melting a first molding material to mold a molded product in the first cavity space, a second heating cylinder connected to a second cavity space among the plurality of cavity spaces formed in the mold device and melting a second molding material to mold a molded product in the second cavity space, and a control unit that controls the temperature rise timing of each of the first heating cylinder and the second heating cylinder individually. Effect of the Invention

[0011] According to one aspect of the present invention, the residence time of the molding material supplied to the heating cylinder can be reduced, thereby preventing molding defects such as scorching of the molding material in the heating cylinder. [Brief description of the drawings]

[0012] [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 front view of a movable platen, a rotary table, and a movable mold according to one embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing an example of a state of the injection molding machine during mold clamping. [Diagram 5] FIG. 5 is a cross-sectional view showing an example of a state of the injection molding machine when the mold is opened, subsequent to FIG. [Figure 6] FIG. 6 is a cross-sectional view showing an example of a state of the injection molding machine during mold clamping, subsequent to FIG. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. 6, showing an example of the state of the injection molding machine during mold clamping shown in FIG. [Figure 8] FIG. 8 is a cross-sectional view showing an example of a state of the injection molding machine when the mold is opened. [Figure 9] FIG. 9 is a cross-sectional view showing an example of a state of the injection molding machine when the second ejector rod abuts against the second ejector plate before the first ejector rod abuts against the first ejector plate. [Figure 10] FIG. 10 is a cross-sectional view showing an example of a state of the injection molding machine when the first ejector rod abuts against the first ejector plate and at the same time the second ejector rod abuts against the second ejector plate. [Figure 11] FIG. 11 is a cross-sectional view showing an example of a state of the injection molding machine when the first ejector rod and the second ejector rod are in the ejection position. [Figure 12]FIG. 12 is a functional block diagram illustrating components of a control device according to an embodiment. [Figure 13] FIG. 13 is a diagram showing a first example of the calendar timer setting information. [Figure 14] FIG. 14 is a flowchart showing an overall flow of cylinder temperature increase control in an injection molding machine according to one embodiment. [Figure 15] FIG. 15 is a flowchart of temperature rise control based on a set time in a cylinder temperature control unit of an injection molding machine according to one embodiment. [Figure 16] FIG. 16 is a flowchart of temperature increase control based on the detected temperature of the mold device in a cylinder temperature control section of an injection molding machine according to one embodiment. [Figure 17] FIG. 17 is a diagram showing a second example of the calendar timer setting information. [Figure 18] FIG. 18 is a diagram showing a third example of the calendar timer setting information. [Figure 19] FIG. 19 is a diagram showing a fourth example of the calendar timer setting information. [Figure 20] FIG. 20 is a diagram showing a fifth example of the calendar timer setting information. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same or corresponding reference numerals, and the description thereof may be omitted.

[0014] (injection molding machine) Fig. 1 is a diagram showing a state of an injection molding machine according to an embodiment when mold opening is completed. Fig. 2 is a diagram showing a state of an injection molding machine according to an embodiment when mold clamping is performed. In Figs. 1 and 2, 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 the operation side, and the positive side of the Y-axis direction is the anti-operation side.

[0015] As shown in Figures 1 and 2, the injection molding machine 10 has a mold clamping device 100 that opens and closes the mold device 800, a first ejector device 201 that ejects the second molded product 22 molded by the mold device 800, a second ejector device 202 (see Figure 7) that ejects the second molded product 22 molded by the mold device 800, a first injection device 301 that injects molding material into the mold device 800, a second injection device 302 (see Figure 7) that injects molding material into the mold device 800, a first movement device 401 that moves the first injection device 301 forward and backward relative to the mold device 800, a second movement device (not shown) that moves the second injection device 302 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 unit frame 910 that supports the mold clamping unit 100, and an injection unit frame 920 that supports the first injection unit 301 and the second injection unit 302. The mold clamping unit frame 910 and the injection unit 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 unit frame 920. Each component of the injection molding machine 10 will be described below.

[0016] (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.

[0017] The mold clamping device 100 performs mold closing, pressure increase, 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.

[0018] The mold clamping apparatus 100 is, for example, of a horizontal type, and the mold opening and closing direction is horizontal. The mold clamping apparatus 100 has a fixed platen 110, a movable platen 120, a rotating table 190 (see FIG. 3, etc.), a rotating mechanism 194 (see FIG. 3, etc.), a moving mechanism 102, a mold temperature regulator 600, and a temperature detector 610.

[0019] FIG. 3 is a view of a movable platen, a rotary table, and a movable mold 820 according to an embodiment as viewed from the front. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing an example of the state of the injection molding machine at the time of mold clamping. FIG. 5 is a cross-sectional view taken along line VII-VII in FIG. 6, showing an example of the state of the injection molding machine at the time of mold clamping, following FIG. 5. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6, showing an example of the state of the injection molding machine at the time of mold clamping shown in FIG. 6. The X-axis direction, the Y-axis direction, and the Z-axis direction in FIG. 3 to FIG. 7 are the same directions as the X-axis direction, the Y-axis direction, and the Z-axis direction in FIG. 1 to FIG. 2.

[0020] The fixed platen 110 is fixed to the mold clamping unit frame 910. A fixed mold 810 is attached to the surface of the fixed platen 110 facing the movable platen 120. The fixed mold 810 has a first fixed molding surface 811 and a second fixed molding surface 812 on the surface facing the movable mold 820.

[0021] The first fixed molding surface 811 forms a part of the wall surface of a first cavity space 801 in which the first molded product 21 is molded. On the other hand, the second fixed molding surface 812 forms a part of the wall surface of a second cavity space 802 in which the second molded product 22 is molded.

[0022] The first fixed molding surface 811 and the second fixed molding surface 812 are formed in different shapes, for example, each being formed in a concave shape. The first fixed molding surface 811 and the second fixed molding surface 812 are formed on the same template, but may be formed on different templates.

[0023] 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 laid on the mold clamping unit frame 910. A movable mold 820 is attached via a rotating table 190 to the surface of the movable platen 120 facing the fixed platen 110. As shown by the dashed line in Fig. 7, the movable platen 120 rotatably supports a rotating shaft 191 of the rotating table 190 via a bearing 199.

[0024] The movable mold 820 has a first movable molding surface 821 and a second movable molding surface 822 on the surface facing the fixed mold 810. The first movable molding surface 821 and the second movable molding surface 822 form a part of the wall surface of the first cavity space 801 and a part of the wall surface of the second cavity space 802, respectively (see FIGS. 4 and 6).

[0025] The first movable molding surface 821 and the second movable molding surface 822 are formed in the same shape, for example, in a convex shape. The first movable molding surface 821 and the second movable molding surface 822 are formed on the same template, but may be formed on different templates.

[0026] In this embodiment, the first fixed molding surface 811 and the second fixed molding surface 812 are formed concavely, and the first movable molding surface 821 and the second movable molding surface 822 are formed convexly, but the present invention is not limited to this. In other words, the first fixed molding surface 811 and the second fixed molding surface 812 may be formed convexly, and the first movable molding surface 821 and the second movable molding surface 822 may be formed concavely.

[0027] The rotation mechanism 194 rotates the rotation table 190. The rotation mechanism 194 has a cylindrical rotating tube 195 extending rearward from the outer periphery of the rotating table 190, a passive gear 196 formed on the entire outer periphery of the rotating tube 195 in the circumferential direction, a driving gear 197 meshing with the passive gear 196, and a rotation motor 198 that rotates the driving gear 197. The rotational driving force of the rotation motor 198 is transmitted to the rotation table 190 via the driving gear 197, the passive gear 196, and the rotating tube 195.

[0028] The rotary motor 198 is disposed above the movable platen 120 (Z-axis direction positive side), but may be disposed below the movable platen 120 (Z-axis direction negative side) or to the side of the movable platen 120 (Y-axis direction positive side or Y-axis direction negative side). A timing belt may be used as a means for transmitting the rotational driving force of the rotary motor 198 to the rotary table 190.

[0029] The rotation mechanism 194 rotates the rotary table 190 by 180° when the mold is opened, thereby turning the first movable molding surface 821 between a position where it forms part of the wall surface of the first cavity space 801 (see FIG. 4) and a position where it forms part of the wall surface of the second cavity space 802 (see FIG. 6). Similarly, the rotation mechanism 194 rotates the rotary table 190 by 180° when the mold is opened, thereby turning the second movable molding surface 822 between a position where it forms part of the wall surface of the first cavity space 801 (see FIG. 6) and a position where it forms part of the wall surface of the second cavity space 802 (see FIG. 4).

[0030] 4, the first movable molding surface 821 and the first fixed molding surface 811 form a first cavity space 801, and the second movable molding surface 822 and the second fixed molding surface 812 form a second cavity space 802. Also, during the mold clamping shown in FIG. 6, the second movable molding surface 822 and the first fixed molding surface 811 form the first cavity space 801, and the first movable molding surface 821 and the second fixed molding surface 812 form the second cavity space 802.

[0031] The rotation mechanism 194 may reverse the rotation direction of the turntable 190 every time the turntable 190 is rotated 180°. For example, the rotation mechanism 194 rotates the turntable 190 180° clockwise, and then rotates the turntable 190 180° counterclockwise. Since the arrangement of the wiring and piping fixed to the turntable 190 is restored to the original arrangement, the wiring and piping can be easily managed.

[0032] The moving mechanism 102 (see FIGS. 1 and 2) closes, pressurizes, clamps, depressurizes, and opens the mold apparatus 800 by moving the fixed platen 110 and the movable platen 120 relatively toward and away from each other. During mold opening, the rotating mechanism 194 rotates the rotating table 190 by 180°. The moving mechanism 102 has a toggle support 130 arranged at an interval 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 / 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 interval L between the fixed platen 110 and the toggle support 130.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The mold clamping device 100 performs a mold closing process, a pressure increase process, a mold clamping process, a pressure release process, a mold opening process, a mold rotation process, and the like under the control of the control device 700. The mold rotation process is performed after the mold opening process is completed and before the start of the next mold closing process. In this embodiment, the mold rotation process is performed after the ejection process is completed, but it may be performed before the ejection process is completed. For example, when the position where the secondary molded product is molded is different from the position where the secondary molded product is ejected, the mold rotation process is performed after the mold opening process is completed, and then the ejection process is performed. Specifically, for example, when the position where the secondary molded product is molded is the operation side and the position where the secondary molded product is ejected is the anti-operation side, the mold rotation process is performed after the mold opening process is completed, and then the ejection process is performed.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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, a first cavity space 801 and a second cavity space 802 are formed between the movable mold 820 and the fixed mold 810, as shown in FIG.

[0046] 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.

[0047] 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.

[0048] After the mold opening step is completed, and before the start of the next mold closing step, an ejection step is performed. In the ejection step, the first ejector device 201 and the second ejector device 202 eject the second molded product 22 from the movable mold 820, as will be described in detail later. After the ejection step is completed, and before the start of the next mold closing step, a mold rotation step is performed.

[0049] In the mold rotation step, the rotary table 190 is rotated to rotate the first molded product 21 together with the movable mold 820. Thereafter, the mold closing step and the pressure increasing step are performed, whereby the first molded product 21 is disposed in a part of the second cavity space 802.

[0050] The setting conditions in the mold closing process and the pressure increase 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The rotational drive force transmission unit 185 is composed of, for example, gears. In this case, a passive 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 passive 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] The temperature detector 610 detects the temperature of the mold device 800. The temperature detector 610 sends a temperature signal indicating the detected temperature to the control device 700.

[0063] The mold temperature regulator 600 regulates the temperature of the mold device 800. As shown in FIG. 4, the mold device 800 has flow paths 813A, 813B, 813C, and 813D for a temperature control medium therein. The mold temperature regulator 600 regulates the temperature of the mold device 800 by regulating the temperature of the temperature control medium supplied to the flow paths 813A to 813D of the mold device 800. The mold temperature regulator 600 performs temperature regulation in response to a control signal from the control device 700. In this way, the mold temperature regulator 600 can regulate the temperature of the mold device 800 based on the temperature detected by the temperature detector 610.

[0064] (First ejector device and second ejector device) In describing the first ejector device 201 and the second ejector device 202 (see FIG. 8, etc.), similarly to the description of the mold clamping device 100, the movement direction of the movable platen 120 when the mold is closed (e.g., the positive direction of the X-axis) is defined as the front, and the movement direction of the movable platen 120 when the mold is opened (e.g., the negative direction of the X-axis) is defined as the rear.

[0065] The first ejector unit 201 and the second ejector unit 202 are attached to the movable platen 120 and move forward and backward together with the movable platen 120. The first ejector unit 201 and the second ejector unit 202 eject the second molded product 22 from the movable mold 820 when the mold is opened.

[0066] The first ejector device 201 has a first ejector rod 211 that advances and retreats relative to a fixed part 830 of the movable mold 820. The first ejector rod 211 pushes a first movable part 840 of the movable mold 820 forward, thereby releasing the second molded product 22 from the fixed part 830 of the movable mold 820.

[0067] The first ejector rod 211 may be connected to the first movable part 840 of the movable mold 820, but in this embodiment, it is not connected to the first movable part 840 of the movable mold 820 for the purpose of rotating the movable mold 820.

[0068] The first ejector rod 211 moves forward relative to the fixed portion 830 of the movable mold 820, approaching and contacting the first movable portion 840 of the movable mold 820, and pushing the first movable portion 840 forward thereby releasing the second molded product 22 from the fixed portion 830.

[0069] Similarly, the second ejector device 202 has a second ejector rod 212 that advances and retreats relative to the fixed part 830 of the movable mold 820. The second ejector rod 212 pushes the second movable part 850 of the movable mold 820 forward, thereby releasing the second molded product 22 from the fixed part 830 of the movable mold 820.

[0070] The second ejector rod 212 may be connected to the second movable part 850 of the movable mold 820, but in this embodiment, it is not connected to the second movable part 850 of the movable mold 820 for the purpose of rotating the movable mold 820.

[0071] The second ejector rod 212 moves forward relative to the fixed portion 830 of the movable mold 820, approaching and contacting the second movable portion 850 of the movable mold 820, and pushing the second movable portion 850 forward thereby releasing the second molded product 22 from the fixed portion 830.

[0072] The first ejector device 201 and the second ejector device 202 are disposed at an interval in the Y-axis direction. Meanwhile, the first cavity space 801 and the second cavity space 802 are disposed at an interval in the Z-axis direction perpendicular to the Y-axis direction (see FIG. 6).

[0073] The direction in which the first ejector device 201 and the second ejector device 202 are aligned is perpendicular to the direction in which the first cavity space 801 and the second cavity space 802 are aligned. The direction in which the first ejector device 201 and the second ejector device 202 are aligned is, for example, the Y-axis direction. The direction in which the first cavity space 801 and the second cavity space 802 are aligned is, for example, the Z-axis direction.

[0074] The direction in which the first ejector device 201 and the second ejector device 202 are aligned may be reversed to the direction in which the first cavity space 801 and the second cavity space 802 are aligned. For example, the direction in which the first ejector device 201 and the second ejector device 202 are aligned may be the Z-axis direction. The direction in which the first cavity space 801 and the second cavity space 802 are aligned may be the Y-axis direction.

[0075] The second cavity space 802 is disposed above the first cavity space 801, for example, to take out the second molded product 22 above the mold clamping unit 100. In this case, the first ejector rod 211 and the second ejector rod 212 are disposed above the rotation center line 190X of the rotary table 190 (see FIG. 3).

[0076] The second cavity space 802 may be disposed below the first cavity space 801, for example, so that the second molded product 22 is dropped below the mold clamping unit 100. In this case, the first ejector rod 211 and the second ejector rod 212 are disposed below the rotation center line 190X of the rotary table 190.

[0077] The first ejector device 201 and the second ejector device 202 are arranged at an interval in the Y-axis direction and eject the second molded product 22, which is elongated in the Y-axis direction, from the movable die 820. Since the second molded product 22 can be pressed at a plurality of points in the longitudinal direction of the second molded product 22, deformation of the second molded product 22 can be prevented, and damage to the second molded product 22 can be prevented.

[0078] The first ejector unit 201 and the second ejector unit 202 perform an ejection process under the control of the control device 700. In the ejection process, the first ejector rod 211 and the second ejector rod 212 are advanced from the standby position to the ejection position at a set moving speed, thereby ejecting the second molded product 22 from the movable mold 820. Thereafter, in the ejection process, the first ejector rod 211 and the second ejector rod 212 are retreated from the ejection position to the standby position at a set moving speed.

[0079] (First injection device and second injection device) In the explanation of the first injection unit 301 and the second injection unit 302 (see FIG. 7, etc.), unlike the explanation of the mold clamping unit 100, etc., 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.

[0080] The first injection unit 301 is installed on a first slide base 303, and the first slide base 303 is disposed so as to be movable forward and backward with respect to the injection unit frame 920. The first injection unit 301 is disposed so as to be movable forward and backward with respect to the mold unit 800. The first injection unit 301 touches the mold unit 800 (more specifically, the fixed mold 810) and fills the first cavity space 801 in the mold unit 800 with molding material.

[0081] The second injection device 302 is installed on a second slide base, and the second slide base is disposed so as to be freely movable forward and backward with respect to the injection device frame 920. The second injection device 302 is disposed so as to be freely movable forward and backward with respect to the mold device 800. The second injection device 302 touches the mold device 800 (more specifically, the fixed mold 810) and fills the second cavity space 802 in the mold device 800 with molding material.

[0082] The first injection device 301 and the second injection device 302 are disposed at an interval in the Y-axis direction. Meanwhile, the first cavity space 801 and the second cavity space 802 are disposed at an interval in the Z-axis direction perpendicular to the Y-axis direction. The molding material that the first injection device 301 fills into the first cavity space 801 and the molding material that the second injection device 302 fills into the second cavity space 802 may be different materials or the same material.

[0083] The first injection device 301 and the second injection device 302 are configured in the same manner. Therefore, hereinafter, the configuration of the first injection device 301 will be described, and the configuration of the second injection device 302 will not be described. The first injection device 301 has, for example, a cylinder 310 that heats a molding material, a nozzle 320 provided at the front end of the cylinder 310, a screw 330 that is rotatably and reciprocally disposed within the cylinder 310, a metering motor 340 that rotates the screw 330, an injection motor 350 that moves the screw 330 forward and backward, and a load detector 360 that detects the force transmitted between the injection motor 350 and the screw 330 (see FIGS. 1 and 2).

[0084] The cylinder 310 heats the molding material supplied to the inside from the supply port 311. The cylinder 310 is an example of a heating cylinder, and is connected to the first cavity space 801 or the second cavity space 802 formed by the mold device 800, and heats the molding material supplied into the cylinder 310 to melt the molding material in order to mold a molded product in the first cavity space 801 or the second cavity space 802. Furthermore, the cylinder 310 on the first injection device 301 side is an example of a first heating cylinder connected to the first cavity space 801, and the cylinder 310 of the second injection device 302 is an example of a second heating cylinder connected to the second cavity space 802.

[0085] The molding material includes, for example, a resin. The molding material is formed, for example, in the form of pellets, and is supplied in a solid state to a supply port 311. The supply port 311 is formed at the rear of the cylinder 310. A cooler 312, such as a water-cooled cylinder, is provided on the outer periphery of the rear of the cylinder 310. A heater 313, such as a band heater, and a temperature detector 314 are provided on the outer periphery of the cylinder 310, forward of the cooler 312.

[0086] The control device 700 of this embodiment individually controls the heater 313 provided in the cylinder 310 of the first injection device 301 and the heater 313 provided in the cylinder 310 of the second injection device 302. For example, the control device 700 performs heating control of the heater 313 provided in the cylinder 310 of the first injection device 301 so that the target temperature corresponding to the molding material supplied to the cylinder 310 of the first injection device 301 is reached based on the temperature detected by the temperature detector 314 provided in the cylinder 310 of the first injection device 301. As another example, the control device 700 performs heating control of the heater 313 provided in the cylinder 310 of the second injection device 302 so that the target temperature corresponding to the molding material supplied to the second injection device 302 is reached based on the temperature detected by the temperature detector 314 provided in the cylinder 310 of the second injection device 302.

[0087] The target temperature according to the molding material is a temperature determined as a target for completing the temperature increase of the cylinder 310 by the temperature increase control (in other words, a target to be reached) when the heating control of the cylinder 310 is performed by the heater 313 after the molding material is supplied to the cylinder 310. Note that different target temperatures are set for molding and for keeping warm.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] The first injection device 301 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.

[0096] 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.

[0097] 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.

[0098] The load detector 360 detects the force transmitted between the injection motor 350 and the screw 330. The detected force is converted into pressure by the control device 700. The load detector 360 is provided on a force transmission path between the injection motor 350 and the screw 330, and detects the force acting on the load detector 360.

[0099] The load detector 360 sends a signal indicating the detection result to the control device 700. The detection result of the load detector 360 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 exerts on the molding material, and the like.

[0100] 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.

[0101] 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.

[0102] In the metering process, in order to restrict abrupt retraction of the screw 330, the injection motor 350 may be driven to apply a set back pressure to the screw 330. The back pressure on the screw 330 is detected, for example, by using a load detector 360. The load detector 360 sends a signal indicating the detection result to the control device 700. 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.

[0103] 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.

[0104] 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 first 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.

[0105] 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.

[0106] An upper limit value for the pressure of the screw 330 is set for each section in which the moving speed of the screw 330 is set. The pressure of the screw 330 is detected by a load detector 360. When the pressure of the screw 330 is equal to or lower than the set pressure, the screw 330 is advanced at the set moving speed. On the other hand, when the pressure of the screw 330 exceeds the set pressure, the screw 330 is advanced at a moving speed slower than the set moving speed so that the pressure of the screw 330 is equal to or lower than the set pressure, for the purpose of protecting the mold.

[0107] 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.

[0108] 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 load detector 360 sends a signal indicating the detection result to the control device 700. The set value of the holding pressure may be changed depending on the elapsed time from the start of the holding pressure step, etc. The holding pressure and the holding time for holding the holding pressure in the holding pressure step may each be set multiple times, or may be set collectively as a series of setting conditions.

[0109] In the dwelling step, the molding material in the first cavity space 801 in the mold device 800 is gradually cooled, and when the dwelling step is completed, the entrance to the first 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 first cavity space 801. After the dwelling step, the cooling step is started. In the cooling step, the molding material in the first cavity space 801 is solidified. In order to shorten the molding cycle time, a measuring step may be performed during the cooling step.

[0110] The first injection device 301 in this embodiment is of an in-line screw type, but may be of a pre-plastication type or the like. The 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 the mold device 800. 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.

[0111] Furthermore, the first injection unit 301 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 unit combined with the vertical first injection unit 301 may be either a vertical type or a horizontal type. Similarly, a mold clamping unit combined with the horizontal first injection unit 301 may be either a horizontal type or a vertical type.

[0112] (First moving device and second moving device) In describing the first moving device 401 and the second moving device (not shown), similarly to the description of the first injection device 301 and the second injection device 302, the movement direction of the screw 330 during filling (e.g., the negative X-axis direction) will be described as the forward direction, and the movement direction of the screw 330 during metering (e.g., the positive X-axis direction) will be described as the rearward direction.

[0113] The first moving device 401 moves the first injection device 301 forward and backward relative to the mold device 800. In addition, the first moving device 401 presses the nozzle 320 of the first injection device 301 against the mold device 800, generating a nozzle touch pressure.

[0114] The second moving device moves the second injection device 302 forward and backward relative to the mold device 800. In addition, the second moving device presses the nozzle of the second injection device 302 against the mold device 800, generating a nozzle touch pressure.

[0115] The first moving device 401 and the second moving device are disposed with an interval in the Y-axis direction. The first moving device 401 and the second moving device move the first injection device 301 and the second injection device 302 forward and backward independently.

[0116] The first moving device 401 and the second moving device are configured similarly. Therefore, hereinafter, the configuration of the first moving device 401 will be described, and the description of the configuration of the second moving device will be omitted. The first moving device 401 includes a hydraulic pump 410, a motor 420 as a drive source, a hydraulic cylinder 430 as a hydraulic actuator, and the like (see FIGS. 1 and 2).

[0117] 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.

[0118] 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.

[0119] 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 first injection device 301. 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.

[0120] The front chamber 435 of the hydraulic cylinder 430 is connected to the first port 411 of the hydraulic pump 410 via the first flow path 413. The first injection unit 301 is pushed forward by the hydraulic fluid discharged from the first port 411 being supplied to the front chamber 435 via the first flow path 413. The first injection unit 301 is moved forward, and the nozzle 320 of the first injection unit 301 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.

[0121] 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 414. 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 414, thereby pushing the first injection unit 301 backward. The first injection unit 301 is moved backward, and the nozzle 320 of the first injection unit 301 is separated from the fixed mold 810.

[0122] In this embodiment, the first moving device 401 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 first injection device 301 may be used.

[0123] (Control device) The control device 700 is configured, for example, by a computer, and has a CPU (Central Processing Unit) 701, a storage medium 702 such as a memory, an input interface 703, and an output interface 704 as shown in Fig. 1 and Fig. 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 via the input interface 703, and transmits signals to the outside via the output interface 704.

[0124] 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, ejection process, mold rotation process, etc., to repeatedly manufacture molded products. A series of operations to obtain a molded product, for example, the operations 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."

[0125] 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, an ejection process, and a mold rotation 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 end of the pressure release process coincides with the start of the mold opening process.

[0126] 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 if the opening / closing valve closes the flow path of the nozzle 320.

[0127] Note that one molding cycle may include steps other than the metering step, mold closing step, pressure increase step, mold clamping step, filling step, pressure holding step, cooling step, pressure release step, mold opening step, ejection step, and mold rotation step.

[0128] 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.

[0129] Furthermore, after the metering step is completed, a post-metering suck-back step may be performed in which the screw 330 is retracted 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.

[0130] The control device 700 is connected to an operation device 750 that accepts input operations by a user 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 screen of the touch panel 770 may display information such as the settings of the injection molding machine 10 and the current state of the injection molding machine 10. In addition, for example, an operation unit such as a button that accepts an input operation by a user and an input field may be displayed on the screen of the touch panel 770. The touch panel 770 as the operation device 750 detects an input operation on the screen by the user and outputs a signal corresponding to the input operation to the control device 700. Thereby, for example, the user can operate the operation unit provided on the screen while checking the information displayed on the screen to perform settings of the injection molding machine 10 (including input of a setting value). In addition, the user can operate the operation unit provided on the screen to perform an operation of the injection molding machine 10 corresponding to the operation unit. The operation of the injection molding machine 10 may be, for example, the operation (including stopping) of the clamping device 100, the first ejector device 201, the second ejector device 202, the first injection device 301, the second injection device 302, the first moving device 401, the second moving device, etc. The operation of the injection molding machine 10 may be, for example, switching of a screen displayed on the touch panel 770 serving as the display device 760.

[0131] 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).

[0132] (Mold release control of molded products) 5 etc., the movable platen 120 has a front plate 121, an intermediate block 124, a rear block 126, and a toggle link attachment portion 128. The front plate 121, the intermediate block 124, the rear block 126, and the toggle link attachment portion 128 may be formed separately and then connected, or may be formed integrally by casting or the like.

[0133] The front plate 121 rotatably supports the rotary table 190. The front plate 121 is formed with a first through hole 122 in which the first ejector rod 211 is arranged so as to be able to move forward and backward. Similarly, the front plate 121 is formed with a second through hole 123 in which the second ejector rod 212 is arranged so as to be able to move forward and backward.

[0134] The intermediate block 124 is disposed radially inside a cylindrical rotating tube 195 that extends rearward from the outer periphery of the rotating table 190. A space in which a first ejector device 201 is disposed and a space in which a second ejector device 202 is disposed are formed inside the intermediate block 124 (see FIG. 7). A front plate 121 is attached to the front end surface of the intermediate block 124. An insertion hole 125 into which the rotating shaft 191 of the rotating table 190 is inserted via a bearing 199 is formed in the front plate 121 and the intermediate block 124, as shown by a dashed line in FIG. 7.

[0135] The rear block 126 rotatably supports the passive gear 196. The rear block 126 is formed in a rectangular shape when viewed in the X-axis direction (see FIG. 3). An insertion hole 127 through which the tie bar 140 is inserted is formed at each of the four corners of the rear block 126. Note that a notch may be formed instead of the insertion hole 127. Inside the rear block 126, a space in which the first ejector device 201 is disposed and a space in which the second ejector device 202 is disposed are formed (see FIG. 7).

[0136] A pair of toggle link mounting portions 128 are provided at a distance in the Z-axis direction at the center in the Y-axis direction of the rear end face of the rear block 126. Each of the pair of toggle link mounting portions 128 has a plurality of toggle link mounting plates perpendicular to the Y-axis direction and spaced apart in the Y-axis direction. Each of the plurality of toggle link mounting plates protrudes rearward from the rear end face of the rear block 126 and has a pin hole 129 at its tip. A pin is inserted into the pin hole 129, and a first link 152 (see FIGS. 1 and 2) is attached to the toggle link mounting portion 128 via the pin so as to be able to swing freely.

[0137] 4, when the mold is clamped, the first movable molding surface 821 and the first fixed molding surface 811 form a first cavity space 801, and the second movable molding surface 822 and the second fixed molding surface 812 form a second cavity space 802. A molding material is supplied from the first injection device 301 to the first cavity space 801, and the first molded product 21 is molded.

[0138] The first molded product 21 is molded in the first cavity space 801 when the mold is clamped as shown in Fig. 4, and is rotated 180° together with the movable mold 820 without being pushed out of the movable mold 820 when the mold is opened as shown in Fig. 5. Thereafter, the first molded product 21 is placed in a part of the second cavity space 802 when the mold is clamped as shown in Fig. 6, and becomes a part of the second molded product 22.

[0139] As shown in Fig. 6, when the mold is clamped, the second movable molding surface 822 and the first fixed molding surface 811 form a first cavity space 801, and the first movable molding surface 821 and the second fixed molding surface 812 form a second cavity space 802. A molding material is supplied from the second injection device 302 to the second cavity space 802, and the second molded product 22 is molded. In parallel with the molding of the second molded product 22, a molding material is supplied from the first injection device 301 to the first cavity space 801, and the first molded product 21 is molded. Thereafter, the mold is opened as shown in Fig. 8.

[0140] FIG. 8 is a cross-sectional view showing an example of the state of the injection molding machine when the mold is opened. FIG. 9 is a cross-sectional view showing an example of the state of the injection molding machine when the second ejector rod abuts against the second ejector plate before the first ejector rod abuts against the first ejector plate. FIG. 10 is a cross-sectional view showing an example of the state of the injection molding machine when the first ejector rod abuts against the first ejector plate and at the same time the second ejector rod abuts against the second ejector plate. FIG. 11 is a cross-sectional view showing an example of the state of the injection molding machine when the first ejector rod and the second ejector rod are in the protruding position. The X-axis direction, the Y-axis direction, and the Z-axis direction in FIG. 8 to FIG. 11 are the same directions as the X-axis direction, the Y-axis direction, and the Z-axis direction in FIG. 1 to FIG. 2.

[0141] As shown in FIG. 8, the movable mold 820 has a fixed portion 830 that cannot advance or retreat relative to the movable platen 120, a first movable portion 840 that can advance or retreat relative to the movable platen 120, and a second movable portion 850 that can advance or retreat relative to the movable platen 120.

[0142] The fixed portion 830 of the movable mold 820 includes a movable mounting plate 831 attached to the rotating table 190, a spacer block 835 that forms a space 834 in front of the movable mounting plate 831, and a movable mold plate 836 fixed to the movable mounting plate 831 via the spacer block 835.

[0143] The movable mounting plate 831 is formed with a first through hole 832 into which the first ejector rod 211 is inserted and removed. A plurality of first through holes 832 are formed around the rotation center line 190X of the rotary table 190 (see FIG. 3). The plurality of first through holes 832 are arranged rotationally symmetrically, for example, arranged with 180° rotational symmetry.

[0144] Similarly, the movable mounting plate 831 is formed with a second through hole 833 through which the second ejector rod 212 is inserted and removed. A plurality of second through holes 833 are formed around the rotation center line 190X of the rotary table 190 (see FIG. 3). The plurality of second through holes 833 are arranged rotationally symmetrically, for example, arranged with 180° rotational symmetry.

[0145] The spacer block 835 forms a space 834 between the movable mounting plate 831 and the movable mold plate 836. A first ejector plate 841 (described later) and a second ejector plate 851 (described later) are disposed in this space 834 so as to be movable forward and backward.

[0146] The movable mold plate 836 has a first movable molding surface 821 and a second movable molding surface 822 on the surface facing the fixed mold 810. The first movable molding surface 821 and the second movable molding surface 822 form a part of the wall surface of the first cavity space 801 and a part of the wall surface of the second cavity space 802, respectively (see FIGS. 4 and 6).

[0147] As shown in FIG. 9, the first movable part 840 of the movable mold 820 includes a first ejector plate 841 disposed perpendicular to the X-axis direction, and a rod-shaped first ejector pin 842 extending forward from the first ejector plate 841.

[0148] The first ejector plate 841 advances and retreats along a first guide pin 843. A front end of the first guide pin 843 is attached to the movable mold plate 836. Meanwhile, a first stopper 844 that stops the retreat of the first ejector plate 841 is attached to a rear end of the first guide pin 843.

[0149] The first ejector plate 841 is biased from the movable mold plate 836 toward the first stopper 844 by a first return spring 845. The movable mounting plate 831 may also serve as the first stopper 844. In this case, the rear end of the first guide pin 843 is attached to the movable mounting plate 831.

[0150] First ejector pin 842 is arranged so as to be able to freely advance and retreat in first through hole 837 penetrating movable mold plate 836. First through hole 837 is formed in each of first movable molding surface 821 and second movable molding surface 822 (see FIG. 3).

[0151] The first ejector plate 841 is pressed against the first stopper 844 by the biasing force of the first return spring 845. At this time, the front end surface of the first ejector pin 842 is flush with the first movable molding surface 821 or the second movable molding surface 822.

[0152] The first ejector plate 841 is advanced against the biasing force of the first return spring 845. Then, the front end surface of the first ejector pin 842 protrudes forward from the first movable shaping surface 821 or the second movable shaping surface 822.

[0153] A plurality of first movable parts 840 are arranged so that the second molded product 22 can be released from the first movable molding surface 821 and the second molded product 22 can be released from the second movable molding surface 822 separately. The plurality of first movable parts 840 are arranged rotationally symmetrically around the rotation center line 190X of the turntable 190, for example, arranged rotationally symmetrically by 180°.

[0154] As shown in FIG. 9, the second movable part 850 of the movable mold 820 includes a second ejector plate 851 arranged perpendicular to the X-axis direction, and a rod-shaped second ejector pin 852 extending forward from the second ejector plate 851.

[0155] The second ejector plate 851 advances and retreats along the second guide pin 853. A front end of the second guide pin 853 is attached to the movable mold plate 836. Meanwhile, a second stopper 854 that stops the second ejector plate 851 from retreating is attached to a rear end of the second guide pin 853.

[0156] The second ejector plate 851 is biased from the movable mold plate 836 toward the second stopper 854 by a second return spring 855. The movable mounting plate 831 may also serve as the second stopper 854. In this case, the rear end of the second guide pin 853 is attached to the movable mounting plate 831.

[0157] The second ejector pin 852 is arranged so as to be able to freely advance and retreat in a second through hole 838 that penetrates the movable mold plate 836. The second through hole 838 is formed in each of the first movable molding surface 821 and the second movable molding surface 822 (see FIG. 3).

[0158] The second ejector plate 851 is pressed against the second stopper 854 by the biasing force of the second return spring 855. At this time, the front end surface of the second ejector pin 852 is flush with the first movable molding surface 821 or the second movable molding surface 822.

[0159] The second ejector plate 851 is advanced against the biasing force of the second return spring 855. Then, the front end surface of the second ejector pin 852 protrudes forward from the first movable shaping surface 821 or the second movable shaping surface 822.

[0160] A plurality of second movable parts 850 are arranged so that the second molded product 22 can be released from the first movable molding surface 821 and the second molded product 22 can be released from the second movable molding surface 822 separately. The plurality of second movable parts 850 are arranged rotationally symmetrically around the rotation center line 190X of the turntable 190, for example, arranged rotationally symmetrically by 180°.

[0161] In this embodiment, the first ejector plate 841 of the first movable part 840 and the second ejector plate 851 of the second movable part 850 are provided separately, but may be formed integrally. It is only necessary that the release of the second molded product 22 from the first movable molding surface 821 and the release of the second molded product 22 from the second movable molding surface 822 can be performed separately.

[0162] 10, the first ejector device 201 has a first drive mechanism 220 that moves the first ejector rod 211 forward and backward relative to the movable platen 120. The first drive mechanism 220 has, for example, a first ejector motor 221 and a first motion conversion mechanism 225 that converts the rotational motion of the first ejector motor 221 into the linear motion of a first crosshead 223.

[0163] The first motion conversion mechanism 225 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. The rear end of the first ejector rod 211 is attached to the first crosshead 223, and the first ejector rod 211 advances and retreats together with the first crosshead 223.

[0164] The first drive mechanism 220 has a guide bar 224 that guides the first crosshead 223. A front end of the guide bar 224 is attached to the front plate 121 of the movable platen 120. A first ejector rod 211 is arranged in a first through hole 122 of the front plate 121 of the movable platen 120 so as to be able to freely advance and retreat.

[0165] The first drive mechanism 220 advances the first ejector rod 211 from the standby position (see FIG. 8) and inserts the first ejector rod 211 into the first through hole 192 of the rotary table 190. A plurality of first through holes 192 are formed around the rotation center line 190X of the rotary table 190. The plurality of first through holes 192 are arranged rotationally symmetrically, for example, arranged with 180° rotational symmetry (see FIG. 3).

[0166] Next, the first driving mechanism 220 further advances the first ejector rod 211, inserting the first ejector rod 211 into the first through hole 832 of the movable mounting plate 831 of the movable mold 820 and bringing it into contact with the first ejector plate 841 of the movable mold 820 (see Figure 10).

[0167] Next, the first drive mechanism 220 advances the first ejector rod 211 further to the protruding position (see FIG. 11), and advances the first ejector plate 841 and the first ejector pin 842. The front end face of the first ejector pin 842 protrudes forward from the first movable molding surface 821 or the second movable molding surface 822 of the movable mold 820, and the second molded product 22 is released from the first movable molding surface 821 or the second movable molding surface 822.

[0168] Thereafter, the first driving mechanism 220 retracts the first ejector rod 211 from the protruding position (see FIG. 11) and pulls the first ejector rod 211 out of the first through-hole 832 of the movable mounting plate 831 of the movable mold 820. Accordingly, the first return spring 845 retracts the first ejector plate 841 to the first stopper 844.

[0169] Next, the first drive mechanism 220 retreats the first ejector rod 211 to the standby position (see FIG. 8), and pulls the first ejector rod 211 out of the first through-hole 192 of the rotary table 190. In this state, the rotary table 190 is rotated 180°.

[0170] The control device 700 controls the position of the first ejector rod 211 when the first ejector rod 211 advances from the standby position to the protruding position. The control device 700 supplies a current to the first ejector motor 221 based on a deviation ΔX1 (ΔX1=X1s-X1d) between a set value X1s of the position of the first ejector rod 211 and a detected value X1d of the position of the first ejector rod 211.

[0171] The position of the first ejector rod 211 is detected by using, for example, a first ejector motor encoder 222. The first ejector motor encoder 222 detects the rotation of the first ejector motor 221 and sends a signal indicating the detection result to the control device 700. Note that the first ejector rod position detector that detects the position of the first ejector rod 211 is not limited to the first ejector motor encoder 222, and a general one can be used.

[0172] 10, the second ejector device 202 has a second drive mechanism 230 that moves the second ejector rod 212 forward and backward relative to the movable platen 120. The second drive mechanism 230 has, for example, a second ejector motor 231 and a second motion conversion mechanism 235 that converts the rotational motion of the second ejector motor 231 into the linear motion of a second crosshead 233.

[0173] The second motion conversion mechanism 235 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. The rear end of the second ejector rod 212 is attached to the second crosshead 233, and the second ejector rod 212 advances and retreats together with the second crosshead 233.

[0174] The second drive mechanism 230 has a guide bar 234 that guides the second crosshead 233. A front end of the guide bar 234 is attached to the front plate 121 of the movable platen 120. A second ejector rod 212 is arranged in a second through hole 123 of the front plate 121 of the movable platen 120 so as to be able to freely advance and retreat.

[0175] The second drive mechanism 230 and the first drive mechanism 220 are provided independently, and the second crosshead 233 and the first crosshead 223 advance and retreat independently. Compared to when the second crosshead 233 and the first crosshead 223 are integrally formed, that is, when one ejector device is used, the crosshead can be made smaller and the driving force of the crosshead can be reduced. Also, a general-purpose ejector motor can be used.

[0176] The second drive mechanism 230 advances the second ejector rod 212 from the standby position (see FIG. 8) and inserts the second ejector rod 212 into the second through hole 193 of the rotary table 190. Note that a plurality of second through holes 193 are formed around the rotation center line 190X of the rotary table 190. The plurality of second through holes 193 are arranged rotationally symmetrically, for example, arranged with 180° rotational symmetry (see FIG. 3).

[0177] Next, the second drive mechanism 230 further advances the second ejector rod 212, inserting the second ejector rod 212 into the second through hole 833 of the movable mounting plate 831 of the movable mold 820 and bringing it into contact with the second ejector plate 851 of the movable mold 820 (see Figures 9 and 10).

[0178] Next, the second drive mechanism 230 advances the second ejector rod 212 further to the protruding position (see FIG. 11), and advances the second ejector plate 851 and the second ejector pin 852. The front end face of the second ejector pin 852 protrudes forward from the first movable molding surface 821 or the second movable molding surface 822 of the movable mold 820, and the second molded product 22 is released from the first movable molding surface 821 or the second movable molding surface 822. The released second molded product 22 is taken out of the injection molding machine 10.

[0179] Thereafter, the second drive mechanism 230 retracts the second ejector rod 212 from the protruding position (see FIG. 11) and pulls the second ejector rod 212 out of the second through-hole 833 of the movable mounting plate 831 of the movable mold 820. Accordingly, the second return spring 855 retracts the second ejector plate 851 to the second stopper 854.

[0180] Next, the second drive mechanism 230 moves the second ejector rod 212 back to the standby position (see FIG. 8), and pulls the second ejector rod 212 out of the second through hole 193 of the rotary table 190. In this state, the rotary table 190 is rotated 180°.

[0181] The control device 700 controls the position of the second ejector rod 212 when the second ejector rod 212 advances from the standby position to the protruding position. The control device 700 supplies a current to the second ejector motor 231 based on a deviation ΔX2 (ΔX2=X2s−X2d) between a set value X2s of the position of the second ejector rod 212 and a detected value X2d of the position of the second ejector rod 212.

[0182] The position of the second ejector rod 212 is detected by using, for example, the second ejector motor encoder 232. The second ejector motor encoder 232 detects the rotation of the second ejector motor 231 and sends a signal indicating the detection result to the control device 700. Note that the second ejector rod position detector that detects the position of the second ejector rod 212 is not limited to the second ejector motor encoder 232, and a general one can be used.

[0183] FIG. 12 is a diagram showing components of a control device according to an embodiment in the form of functional blocks. Each functional block shown in FIG. 12 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 each processing function performed in each functional block can be realized by a program executed by a CPU, or can be realized as hardware by wired logic. As shown in FIG. 12, the control device 700 has an input receiving unit 711, a display processing unit 712, an acquisition unit 713, a mold temperature control unit 714, and a cylinder temperature control unit 715. The input receiving unit 711 receives an input operation by a user from an operation device 750 via an input interface 703. The display processing unit 712 controls the display of a display screen corresponding to the input operation in the operation device 750 on a display device 760. The acquisition unit 713 acquires a temperature signal related to the mold device 800 from the temperature detector 610, and also acquires a temperature signal related to the cylinder 310 from the temperature detector 314. The mold temperature control unit 714 controls the temperature rise of the mold device 800 using the mold temperature regulator 600 based on the temperature of the mold device 800 indicated by the temperature signal acquired by the acquisition unit 713. The cylinder temperature control unit 715 controls the temperature rise of the cylinder 310 using the heater 313 based on the temperature of the cylinder 310 indicated by the temperature signal acquired by the acquisition unit 713. Note that a specific description of each component will be given later.

[0184] The storage medium 702 of the control device 700 also includes calendar timer setting information 721. The calendar timer setting information 721 is information indicating conditions for starting to individually raise the temperature of the heater 313 provided on the cylinder 310 of the first injection device 301 (hereinafter referred to as the heater 313 on the first injection device 301 side) and the heater 313 provided on the cylinder 310 of the second injection device 302 (hereinafter referred to as the heater 313 on the second injection device 302 side).

[0185] Fig. 13 is a diagram showing a first example of the calendar timer setting information 721. As shown in Fig. 13, in the calendar timer setting information 721, conditions for starting temperature increase are set for each of the heater 313 (warmth) on the first injection unit 301 side, the heater 313 (molding) on ​​the first injection unit 301 side, the heater 313 (warmth) on the second injection unit 302 side, and the heater 313 (molding) on ​​the second injection unit 302 side.

[0186] The record "Heater on the first injection unit side (warm)" shown in FIG. 13 is set with a condition for starting to heat the cylinder 310 of the first injection unit 301 to the warm temperature. The record "Heater on the first injection unit side (molding)" is set with a condition for starting to heat the first injection unit 301 to the molding temperature. The warm temperature is a temperature at which it is desired to shorten the time until molding compared to room temperature, but molding will not begin immediately. For example, it is considered to set the temperature to the warm temperature when preparing peripheral equipment of the injection molding machine 10, such as the ejector, or during a lunch break.

[0187] 13, the condition for starting to raise the temperature of the cylinder 310 of the second injection unit 302 to the heat retention temperature is set. The record of "Heater on the second injection unit side (warm)" shown in Fig. 13, the condition for starting to raise the temperature of the cylinder 310 of the second injection unit 302 to the warm retention temperature is set. The record of "Heater on the second injection unit side (molding)" shows the condition for starting to raise the temperature of the cylinder 310 of the second injection unit 302 to the molding temperature.

[0188] "Status" has a flag indicating whether or not the condition indicated by the record is to be used. When "Status" is set to "○", it indicates that the condition is to be used.

[0189] "Start-up method" indicates a method for starting the temperature increase. As shown in FIG. 13, either "timer" or "mold temperature" is set. In the case of "timer", it is indicated that the temperature increase will start at the time set for each day of the week. In the case of "mold temperature", it is indicated that the temperature increase will start when the mold device 800 reaches the temperature set for each day of the week.

[0190] As shown in FIG. 13, the time when the temperature rise starts or the mold temperature at which the temperature rise starts can be set for each day of the week indicated as "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", and "Sunday".

[0191] In the calendar timer setting information 721, it is possible to set one or more of the time when the heating starts and the temperature of the mold device 800 at which the heating starts for the heater 313 on the first injection device 301 side and the heater 313 on the second injection device 302 side for each day of the week.

[0192] In this embodiment, the heater 313 on the first injection device 301 side and the heater 313 on the second injection device 302 side can be set to start heating up separately. That is, the molding material (hereinafter referred to as the first molding material) supplied to the cylinder 310 of the first injection device 301 and the molding material (hereinafter referred to as the second molding material) supplied to the cylinder 310 of the second injection device 302 may have different target temperatures to be reached by heating up due to differences in material. In such a case, if heating up is started simultaneously, even if one of the molding materials reaches the target temperature, the other molding material may not reach the target temperature. In such a case, if one molding material continues to remain in a state where it has reached the target temperature until the other molding material reaches the target temperature, molding defects such as scorching may occur. Therefore, in this embodiment, the heater 313 on the first injection device 301 side and the heater 313 on the second injection device 302 side can be set to start heating up separately.

[0193] The acquisition unit 713 acquires various signals from each component of the injection molding machine 10. For example, the acquisition unit 713 acquires a temperature signal indicating the temperature of the mold unit 800 from the temperature detector 610. Furthermore, the acquisition unit 713 acquires a temperature signal indicating the temperature of the cylinder 310 from the temperature detector 314 for each of the first injection unit 301 and the second injection unit 302.

[0194] The mold temperature control unit 714 controls the temperature rise of the mold device 800 based on the temperature signal indicating the temperature of the mold device 800 acquired by the acquisition unit. In this embodiment, the mold temperature control unit 714 controls the temperature rise of the mold device 800 by outputting a control signal to the mold temperature regulator 600. The mold temperature control unit 714 of this embodiment controls the temperature rise of the mold device 800 until it reaches a target temperature preset for the mold device 800. The target temperature preset for the mold device 800 is determined according to the embodiment of the material of the molding material, and an explanation is omitted. In this embodiment, the condition for starting the temperature rise of the mold device 800 may be any condition, such as operator control or a timer, as long as molding is possible at the start of the work, and an explanation is omitted.

[0195] The cylinder temperature control unit 715 uses the heater 313 to control the temperature rise of the cylinder 310 provided in each of the first injection device 301 and the second injection device 302 based on the temperature signal of the cylinder 310 acquired by the acquisition unit 713 and the calendar timer setting information.

[0196] When the conditions indicated by the calendar timer setting information are satisfied, the cylinder temperature control unit 715 starts increasing the temperature of the cylinder 310 by the heater 313 on the injection unit side associated with the satisfied condition.

[0197] After starting the temperature increase, the cylinder temperature control unit 715 controls the temperature increase of the cylinder 310 based on the temperature of the cylinder 310 until the target temperature corresponding to the molding material being supplied to the cylinder 310 is reached. In this embodiment, the cylinder temperature control unit 715 controls the temperature increase of the cylinder 310 by outputting a control signal to the heater 313 corresponding to the cylinder 310 to be heated. The target temperature in this embodiment is set to a different value not only depending on the molding material but also depending on whether the purpose of the start is to keep the temperature or to mold. The target temperature for keeping the temperature is lower than the target temperature for molding. Also, the target temperature for keeping the temperature is higher than room temperature.

[0198] Next, there will be described the temperature increase control of the cylinder 310 of the injection molding machine 10. Fig. 14 is a flowchart showing the overall flow of the temperature increase control of the cylinder 310 in the injection molding machine 10 of this embodiment.

[0199] 14, the cylinder temperature control unit 715 reads the calendar timer setting information and determines whether or not "o" is set in the "status" on the "timer" side of the start-up method for each of "heater on the first injection unit side (warmth)", "heater on the first injection unit side (molding)", "heater on the second injection unit side (warmth)", and "heater on the second injection unit side (molding)" (S1401). In this way, in the example shown in FIG. 14, it is determined which start-up method has "o" set in the "status".

[0200] If the cylinder temperature control unit 715 determines that the "status" on the "timer" side is set to "O" (S1401: Yes), it performs temperature increase control based on the day of the week and time set in the "timer" (S1402).

[0201] On the other hand, if the cylinder temperature control unit 715 determines that the "status" on the "timer" side is not set to "O" (S1401: No), the cylinder temperature control unit 715 determines whether the "status" on the "mold temperature" side of the startup method is set to "O" for each of the "heater on the first injection unit side (keep warm)", "heater on the first injection unit side (molding)", "heater on the second injection unit side (keep warm)", and "heater on the second injection unit side (molding)" (S1403).

[0202] When the cylinder temperature control unit 715 determines that "o" is set in the "status" on the "mold temperature" side (S1403: Yes), it performs temperature increase control based on the day of the week set in "mold temperature" and the temperature of the mold device 800 (S1404). On the other hand, when the cylinder temperature control unit 715 determines that "o" is not set in the "status" on the "mold temperature" side (S1403: No), it performs processing again from S1401.

[0203] Next, the temperature rise control based on the day of the week and time set in the "timer" shown in S1402 will be described. FIG. 15 is a flowchart of the temperature rise control based on the set time in the cylinder temperature control unit 715 of this embodiment. The example shown in FIG. 15 is an example showing the processing for the "heater (molding) on ​​the first injection unit side." Furthermore, the example shown in FIG. 15 is an example in which only the "timer" is set and the "mold temperature" is not set.

[0204] First, the cylinder temperature control unit 715 judges whether today is the set day of the week for the "heater (molding) on ​​the first injection unit side" (S1501). If it is judged that today is not the set day of the week (S1501: No), the process ends.

[0205] If it is determined that it is the set day of the week (S1501: Yes), the cylinder temperature control unit 715 determines whether it is the set time of the set day of the week for "heater on the first injection unit side (molding)" (S1502).

[0206] If the cylinder temperature control unit 715 determines that the set time of the set day of the week for the "heater (molding) on ​​the first injection unit side" has not arrived (S1502: No), it repeats the processing of S1502 again after a predetermined time has elapsed.

[0207] On the other hand, when the cylinder temperature control unit 715 determines that the set time of the set day of the week for "heater on the first injection unit side (molding)" has arrived (S1502: Yes), it starts raising the temperature of the heater 313 on the first injection unit side to a first target temperature for molding (S1503). The first target temperature for molding is a target temperature set in advance as a temperature suitable for molding the first molding material supplied to the cylinder 310 on the first injection unit 301 side.

[0208] In the example shown in FIG. 15, the case of the "heater (molding) on ​​the first injection device side" has been described, but similar processing is performed for the "heater (heat retention) on the first injection device side", the "heater (molding) on ​​the second injection device side", and the "heater (heat retention) on the second injection device side", so detailed explanations will be omitted.

[0209] As a result, in raising the temperature of the "heater on the first injection unit side (keep warm)", when the "status" of the "heater on the first injection unit side (keep warm)" is set to "◯" and the set time on the set day arrives, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the first injection unit side to the first target temperature for keeping warm. The first target temperature for keeping warm is a target temperature set in advance as a temperature suitable for keeping warm the first molding material supplied to the cylinder 310 on the first injection unit 301 side.

[0210] The target temperature for heat retention is a temperature at which the molding material will not burn even if it is maintained at that temperature. The target temperature for heat retention can be a value obtained by subtracting 100°C from the temperature required for molding, for example, 150°C or 180°C. The temperature for heat retention can reach the temperature required for molding more quickly compared to room temperature when it is heated, which can improve work efficiency.

[0211] Furthermore, in the heating of the "heater on the second injection unit side (molding)", when "◯" is set to the "status" of the "heater on the second injection unit side (molding)" and the set time on the set day arrives, the cylinder temperature control unit 715 starts heating the heater 313 on the second injection unit side to a second target temperature for molding. The second target temperature for molding is a target temperature set in advance as a temperature suitable for molding the second molding material supplied to the cylinder 310 on the second injection unit 302 side.

[0212] Furthermore, in raising the temperature of the "heater on the second injection unit side (keep warm)", when the "status" of the "heater on the second injection unit side (keep warm)" is set to "◯" and the set time on the set day arrives, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the second injection unit side to a second target temperature for keeping warm. The second target temperature for keeping warm is a target temperature set in advance as a temperature suitable for keeping warm the second molding material supplied to the cylinder 310 on the second injection unit 302 side.

[0213] Next, a specific process flow will be described for the case where the calendar timer setting information shown in FIG. 13 is used. In the calendar timer setting information shown in FIG. 13, the time is set to "Monday" in the "timer" for each of the "heater (molding) on ​​the first injection unit side" and the "heater (molding) on ​​the second injection unit side". After the mold temperature control unit 714 starts temperature increase control of the mold unit 800 every Monday, when the current time becomes "7:40" (an example of the first time), the cylinder temperature control unit 715 determines that it is the set day of the week for the "heater (molding) on ​​the first injection unit side" (S1501: Yes) and determines that the set time of the set day of the week has arrived (S1502: Yes), and starts increasing the temperature of the heater 313 on the first injection unit side to the first target temperature for molding in S1503. In the following description, it is assumed that the process is performed according to the same process procedure as in FIG. 15.

[0214] Thereafter, when the current time becomes "7:50" (an example of the second time), the cylinder temperature control unit 715 determines that it is the set day of the week for the "heater on the second injection unit side (molding)" and also determines that the set time of the set day has arrived, and begins raising the temperature of the heater 313 on the second injection unit side to the second target temperature for molding.

[0215] In this embodiment, as described above, the time at which the temperature rise starts can be made different for each injection unit, which makes it possible to prevent molding defects such as scorching caused by the accumulation of molding material.

[0216] Next, the temperature rise control based on the temperature detected from the mold device 800 shown in S1404 will be described. Fig. 16 is a flowchart of the temperature rise control based on the detected temperature of the mold device 800 in the cylinder temperature control unit 715 of this embodiment. In the example shown in Fig. 16, only the "mold temperature" is set, and the "timer" is not set.

[0217] First, the acquisition unit 713 acquires the temperature of the mold device 800 from the temperature detector 314 (S1601).

[0218] On the other hand, the cylinder temperature control unit 715 judges whether today is the day of the week for which "heater (molding) on ​​the first injection unit side" is set (S1602). If it is determined that today is not the set day of the week (S1602: No), the process ends.

[0219] If the cylinder temperature control unit 715 determines that it is the set day of the week (S1602: Yes), the cylinder temperature control unit 715 determines whether the temperature has reached or exceeded the set mold temperature for the set day of the week (S1603).

[0220] If the cylinder temperature control unit 715 determines that the mold temperature of the "heater (molding) on ​​the first injection unit side" has not reached or exceeded the mold temperature set for today's day of the week (S1603: No), it repeats the processing of S1603 after a predetermined time has elapsed.

[0221] On the other hand, if the cylinder temperature control unit 715 determines that the temperature of the mold device 800 has reached or exceeded the mold temperature set for today's day of the week for the "heater on the first injection unit side (molding)" (S1603: Yes), it begins raising the temperature of the heater 313 on the first injection unit side to the first target temperature for molding (S1604).

[0222] In the example shown in FIG. 16, the case of the "heater (molding) on ​​the first injection device side" has been described, but the specific description will be omitted as similar processing is performed for the "heater (heat retention) on the first injection device side", the "heater (molding) on ​​the second injection device side", and the "heater (heat retention) on the second injection device side".

[0223] As a result, when the "status" of the "heater on the first injection unit side (keep warm)" is set to "O" and the temperature of the mold device 800 becomes equal to or higher than the set mold temperature on the set day of the week, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the first injection unit side to the first target temperature for keeping warm.

[0224] Furthermore, in raising the temperature of the "heater on the second injection unit side (molding)", when the "status" of the "heater on the second injection unit side (molding)" is set to "O" and the temperature of the mold device 800 becomes equal to or higher than the set mold temperature on the set day of the week, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the second injection unit side to the second target temperature for molding.

[0225] Furthermore, in raising the temperature of the "heater on the second injection unit side (keep warm)", when the "status" of the "heater on the second injection unit side (keep warm)" is set to "O" and the temperature of the mold device 800 becomes equal to or higher than the set mold temperature on the set day of the week, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the second injection unit side to the second target temperature for keeping warm.

[0226] Next, a second example of the calendar timer setting information will be described. Fig. 17 is a diagram showing a second example of the calendar timer setting information 721. The example of the calendar timer setting information 721 shown in Fig. 17 is a case where the mold temperature at which to start increasing the temperature to the molding temperature is set, and in the "Heater (molding) on ​​the first injection unit side" and the "Heater (molding) on ​​the second injection unit side", the mold temperature is set in the "Monday" field in the records where the "Startup method" is "Mold temperature" for the "Heater (molding) on ​​the first injection unit side".

[0227] Therefore, every Monday, when the temperature of the mold device 800 reaches "60.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set for the "heater on the first injection unit side (molding)" has been reached, and begins raising the temperature to the first target temperature for molding using the heater 313 on the first injection unit side.

[0228] Furthermore, when the temperature of the mold device 800 reaches "80.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day of the week set in the "heater on the second injection device side (molding)" has been reached, and begins raising the temperature to the second target temperature for molding in the heater 313 on the second injection device side.

[0229] Next, a third example of the calendar timer setting information will be described. Fig. 18 is a diagram showing a third example of the calendar timer setting information 721. The example of the calendar timer setting information 721 shown in Fig. 18 is a case where the mold temperature at which to start increasing the temperature to the warming temperature is set, and in the "Heater on the first injection unit side (warming)" and the "Heater on the second injection unit side (warming)", the mold temperature is set in the "Monday" field in the records where the "Startup method" is "Mold temperature".

[0230] Therefore, every Monday, when the temperature of the mold device 800 reaches "40.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set for "heater on the first injection unit side (heat retention)" has been reached, and begins raising the temperature to the first target temperature for heat retention using the heater 313 on the first injection unit side.

[0231] In addition, when the temperature of the mold device 800 reaches "60.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day of the week set for the "heater on the second injection device side (heat retention)" has been reached, and begins raising the temperature to the second target temperature for heat retention using the heater 313 on the second injection device side.

[0232] In this embodiment, as described above, the timing for starting the temperature rise can be made different for each injection unit. This makes it possible to prevent molding defects such as scorching caused by the accumulation of molding material. Furthermore, the temperature rise of the cylinder 310 is started when the temperature of the mold unit 800 reaches a predetermined set temperature. This allows the temperature rise of the cylinder 310 to be completed before the mold unit 800, making it possible to prevent molding defects such as scorching caused by the accumulation of molding material in the cylinder 310.

[0233] Next, a fourth example of the calendar timer setting information will be described. Fig. 19 is a diagram showing a fourth example of the calendar timer setting information 721. The example of the calendar timer setting information 721 shown in Fig. 19 is a case where the mold temperature for multi-stage control is set, and the mold temperature is set in the "Monday" field in the records where the "Startup method" is "mold temperature" in the "Heater on the first injection unit side (molding)", "Heater on the first injection unit side (warming)", "Heater on the second injection unit side (molding)", and "Heater on the second injection unit side (warming)". As shown in Fig. 19, this is an example where different temperatures are set for warming and molding.

[0234] In this way, the calendar timer setting information may set the mold temperature and time for starting the temperature increase for each of molding and heat retention for one injection unit. In such a case, a situation may occur in which the mold temperature and time set for starting the temperature increase for molding are met while the temperature is being increased to the target temperature for heat retention. In this embodiment, when such a situation occurs, control of the temperature increase to the target temperature for heat retention is terminated, and control of the temperature increase to the target temperature for molding is started. Next, a specific processing flow will be described.

[0235] Every Monday, when the temperature of the mold device 800 reaches "40.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set for "heater on the first injection unit side (heat retention)" has been reached, and begins raising the temperature to the first target temperature for heat retention using the heater 313 on the first injection unit side.

[0236] Thereafter, when the temperature of the mold device 800 reaches "60.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set in the "heater on the second injection device side (heat retention)" has been reached, and begins raising the temperature to the second target temperature for heat retention using the heater 313 on the second injection device side.

[0237] Thereafter, when the temperature of the mold device 800 reaches "70.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set for "heater on the first injection unit side (molding)" has been reached. If the cylinder temperature control unit 715 is raising the temperature of the heater 313 on the first injection unit side to the first target temperature for warmth retention, it ends the temperature raising process. Then, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the first injection unit side to the first target temperature for molding.

[0238] Thereafter, when the temperature of the mold device 800 reaches "80.0°C", the cylinder temperature control unit 715 determines that the set mold temperature for the day set for "heater on the second injection unit side (molding)" has been reached. If the cylinder temperature control unit 715 is raising the temperature of the heater 313 on the second injection unit side to the second target temperature for warmth retention, it ends the temperature raising process. Then, the cylinder temperature control unit 715 starts raising the temperature of the heater 313 on the second injection unit side to the second target temperature for molding.

[0239] In this way, when the temperature of the mold device 800 reaches "40.0°C" or "60.0°C" (an example of a first set temperature), the cylinder temperature control unit 715 starts controlling the temperature increase of the cylinder 310 to the first target temperature for heat retention or the second target temperature for heat retention. Then, when the temperature of the mold device 800 reaches "70.0°C" or "80.0°C" (an example of a second set temperature), the control of the temperature increase aimed at the first target temperature for heat retention or the second target temperature for heat retention ends. Then, the cylinder temperature control unit 715 starts controlling the temperature increase of the cylinder 310 to the first target temperature for molding or the second target temperature for molding corresponding to "70.0°C" or "80.0°C".

[0240] In this embodiment, as described above, the cylinder 310 on the injection molding machine side is heated to a target temperature for insulation based on the temperature of the mold device 800, and then when the temperature of the mold device 800 is further increased, the cylinder 310 on the injection molding machine side is controlled in multiple stages to reach the target temperature for molding. In this way, the cylinder 310 on the injection molding machine side may be heated in multiple stages according to the temperature of the mold device 800.

[0241] In this embodiment, when the mold temperature for starting the temperature increase is set for each of molding and heat retention for one injection unit, if a situation occurs in which the mold temperature set for starting the temperature increase for molding is satisfied while the temperature is being increased to the target temperature for heat retention, the control of the temperature increase to the target temperature for heat retention is terminated, and the control of the temperature increase to the target temperature for molding is started. However, this embodiment is not limited to such control. For example, even if a situation occurs in which the mold temperature or time set for starting the temperature increase for molding is satisfied while the temperature is being increased to the target temperature for heat retention, the temperature increase for heat retention may be continued, and the temperature increase for molding may be started after the temperature increase to the target temperature for heat retention is completed.

[0242] In this embodiment, the multi-stage temperature increase control of the cylinder 310 on the injection molding machine side is not limited to that according to the temperature of the mold device 800, and other methods may be used.

[0243] In the injection molding machine 10 of the present embodiment, as described above, the temperature rise control of the cylinder 310 is performed based on the temperature of the mold device 800. As a result, the temperature rise of the mold device 800 and the temperature rise of the cylinder 310 are performed in parallel, so that the time until the operation can be started can be shortened. Furthermore, even if the mold device 800 takes a longer time to rise in temperature than the cylinder 310, the temperature rise of the cylinder 310 starts after the mold device 800 has risen to a predetermined set temperature, so that the residence time of the molding material supplied to the cylinder 310 from the completion of the temperature rise of the cylinder 310 to the completion of the temperature rise of the mold device 800 can be reduced. This makes it possible to suppress molding defects such as burning of the molding material in the cylinder 310. Furthermore, in the past, when the molding material was a resin, the molding material could be carbonized by staying in the cylinder 310 for a long time and adhere to the screw 330. In contrast, in the injection molding machine 10 of this embodiment, the residence time after the temperature increase to a molding temperature is completed can be reduced, so that adhesion of carbonized molding material to the screw 330 can be suppressed.

[0244] Furthermore, in the injection molding machine 10 of this embodiment, the timing for starting to heat the cylinder 310 is made different for each injection unit by the above-mentioned process. As a result, when different molding materials are supplied to each injection unit, even if the target temperatures to be reached by the heating of each molding material differ, while one molding material is being heated, the heating of the other molding material is completed, and molding defects such as scorching due to the retention of the other molding material and decomposition due to exposure to high temperatures for a long time can be suppressed.

[0245] (Variations, etc.) Although the embodiment of the injection molding machine has been described above, the present invention is not limited to the above embodiment. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. Naturally, these also fall within the technical scope of the present invention.

[0246] In the above embodiment, the case where the temperature of the cylinder 310 of the first injection device 301 and the temperature of the cylinder 310 of the second injection device 302 are increased separately has been described. However, the above embodiment is not limited to the case where the temperature of the cylinder 310 is increased separately. Therefore, as a modified example, a case where a plurality of cylinders are provided and the temperatures are increased simultaneously will be described.

[0247] Fig. 20 is a diagram showing a fifth example of the calendar timer setting information 721. In the example of the calendar timer setting information 721 shown in Fig. 20, the temperature increase control is enabled for each of the "heater on the injection unit side (molding)" and the "heater on the injection unit side (warming)" based on the "mold temperature".

[0248] The cylinder temperature control unit 715 starts temperature rise control of the cylinders 310 of the first injection unit 301 and the second injection unit 302 based on the conditions set in the calendar timer setting information 721. In the example shown in FIG. 20, when the temperature of the mold unit 800 reaches "80.0°C" every Monday, it is determined that the mold temperature set in the "heater (molding) on ​​the injection unit side" has been reached, and starts temperature rise control of the heater 313 on the first injection unit 301 side and the heater 313 on the second injection unit 302 side. At that time, the target temperatures of the heater 313 on the first injection unit 301 side and the heater 313 on the second injection unit 302 side may be the same or different. In this modification, the temperature rise of the mold unit 800 and the temperature rise of the cylinder 310 are performed in parallel, so that the time until the operation can be started can be shortened.

[0249] In this embodiment, an example in which the temperature is increased by two-stage control has also been described. In this embodiment, the multi-stage control is not limited to two-stage control, and three or more stages of control may be performed as a modified example. For example, it is possible to register three or more types of mold temperatures (e.g., 80°C, 100°C, and 120°C) in the calendar timer setting information. Then, it is possible that the cylinder temperature control unit 715 increases the temperature of the cylinder 310 on the injection molding machine side to a target temperature of "250°C" when the temperature of the mold device 800 reaches "80°C", increases the temperature of the cylinder 310 on the injection molding machine side to a target temperature of "300°C" when the temperature of the mold device 800 reaches "100°C", and increases the temperature of the cylinder 310 on the injection molding machine side to a target temperature of "360°C" when the temperature of the mold device 800 reaches "120°C".

[0250] Various other modified examples are possible. In the above embodiment, the first ejector device 201 and the second ejector device 202 are arranged at an interval in the Y-axis direction, and the second molded product 22 long in the Y-axis direction is ejected from the movable mold 820, but the present invention is not limited to this. The first ejector device 201 and the second ejector device 202 may be arranged at an interval in the Z-axis direction, and the second molded product 22 long in the Z-axis direction may be ejected from the movable mold 820.

[0251] In the above embodiment, the first cavity space 801 and the second cavity space 802 are spaced apart in the Z-axis direction, but the present invention is not limited to this. The first cavity space 801 and the second cavity space 802 may be spaced apart in the Y-axis direction.

[0252] In the above embodiment, an example in which the mold temperature control unit 714 is provided in the control device 700 of the injection molding machine 10 has been described. However, this embodiment is not limited to an example in which the control device 700 controls the mold temperature, and other configurations may control the mold temperature. For example, the mold temperature control unit 714 may be provided in the mold temperature regulator 600. In such a case, the mold temperature regulator 600 acquires the temperature of the mold device 800 and controls the temperature rise of the mold device 800 based on the acquired temperature. The control device 700 controls the temperature rise of the cylinder 310 based on the temperature of the mold device 800, etc., indicated by the temperature signal acquired by the acquisition unit 713, as in the above embodiment. This provides the same effects as the above embodiment.

[0253] In the above embodiment, the fixed mold 810 corresponds to the first mold and the movable mold 820 corresponds to the second mold, but the present invention is not limited to this. The fixed mold 810 may correspond to the second mold and the movable mold 820 may correspond to the first mold.

[0254] Although the rotary table 190 is used in the above embodiment, the rotary table 190 does not have to be used. In this case, the second mold is attached to the second platen without the rotary table. If the first ejector device 201 and the second ejector device 202 eject the same molded product from the second mold, deformation of the molded product can be suppressed, and damage to the molded product can be suppressed.

[0255] In the above embodiment, the first injection device 301 and the second injection device 302 are used, but the number of injection devices may be one. If the first ejector device 201 and the second ejector device 202 eject the same molded product from the second mold, deformation of the molded product can be suppressed, and damage to the molded product can be suppressed. The number of injection devices may be three or more. [Explanation of symbols]

[0256] 10 injection molding machine 700 Control device 702 Storage medium 711 Input reception section 712 Display Processing Unit 713 Acquisition Department 714 Mold temperature control unit 715 Cylinder temperature control unit

Claims

1. A first heating cylinder connected to a first cavity space among a plurality of cavity spaces formed in a mold device and melting a first molding material in the first cavity space to mold a molded product; a second heating cylinder connected to a second cavity space among the plurality of cavities formed in the mold device and configured to melt a second molding material in the second cavity space to mold a molded product; a control unit that individually controls a temperature rise timing of the first heating cylinder and a temperature rise timing of the second heating cylinder based on a temperature of the mold device; An injection molding machine comprising:

2. a first heating cylinder connected to a first cavity space among a plurality of cavities formed in the mold device and configured to melt a first molding material in the first cavity space to mold a molded product; a second heating cylinder connected to a second cavity space among the plurality of cavities formed in the mold device and configured to melt a second molding material in the second cavity space to mold a molded product; A control unit that controls a temperature rise timing for each of the first heating cylinder and the second heating cylinder individually; An injection molding machine comprising:

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