Injection molding machine

Abstract

An injection molding machine. The invention provides a technique capable of suppressing a decrease in slidability. The injection molding machine has: a first member having a first surface; a second member having a second surface opposed to the first surface; a sacrificial member fixed to one of the first surface or the second surface and having a third surface that slides with the other of the first surface or the second surface; and a temperature adjustment mechanism that adjusts the temperature of the sacrificial member.

Description

[0001] This application is a divisional application of the original application filed on November 27, 2020, with application number 202011352409.1 and invention title "Injection Molding Machine". Technical Field

[0002] This application claims priority based on Japanese Patent Application No. 2019-217085, filed on November 29, 2019. The entire contents of that Japanese application are incorporated herein by reference.

[0003] This invention relates to an injection molding machine. Background Technology

[0004] Patent document 1 discloses a rotary injection molding machine capable of adjusting the temperature of a rotating mold and a stationary mold.

[0005] In recent years, there has been a demand for higher operating speeds in injection molding machines.

[0006] Patent Document 1: Japanese Patent No. 6400057 When various sliding surfaces are included in an injection molding machine, the higher the speed of the injection molding machine, the greater the frictional heat in the sliding surfaces becomes, which may reduce the sliding performance due to the influence of frictional heat. Summary of the Invention

[0007] One aspect of the present invention provides a technique capable of suppressing a decrease in slippage.

[0008] The injection molding machine according to one aspect of the present invention has: The first component has a first surface; The second component has a second surface facing the first surface; A sacrificial component, fixed to one of the first surface or the second surface, and having a third surface that slides with the other of the first surface or the second surface; and A temperature adjustment mechanism is used to adjust the temperature of the sacrificial component.

[0009] Invention Effects According to one aspect of the present invention, the reduction in slippage can be suppressed. Attached Figure Description

[0010] Figure 1 This is a diagram showing the state of the injection molding machine at the end of mold opening according to one embodiment.

[0011] Figure 2 This is a diagram showing the state of the injection molding machine during mold closing according to one embodiment.

[0012] Figure 3This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold is closed.

[0013] Figure 4 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold opening is completed.

[0014] Figure 5 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 180° and the mold is closed.

[0015] Figure 6 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 180° and the mold opening is completed.

[0016] Figure 7 This is a vertical sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold is closed. It is a vertical sectional view cut along the rotation center line of the turntable.

[0017] Figure 8 This is a diagram showing the sliding plate according to the first embodiment.

[0018] Figure 9 This is a diagram showing the state of the flexible retainer when the rotation angle of the turntable according to one embodiment is 0°.

[0019] Figure 10 This is a diagram showing the state of the flexible retainer when the rotation angle of the turntable according to one embodiment is 180°.

[0020] Figure 11 This is a diagram showing the sliding plate fixed to the turntable according to the first variation of the first embodiment.

[0021] Figure 12 This is a vertical sectional view showing the temperature adjustment circuit involved in the second variation of the first embodiment, and it is a vertical sectional view cut along the rotation center line of the turntable.

[0022] Figure 13 This is a vertical sectional view showing the temperature adjustment circuit involved in the second embodiment, which is a vertical sectional view cut along the rotation center line of the turntable.

[0023] Figure 14 This is a vertical sectional view showing the temperature adjustment circuit involved in the modified example of the second embodiment, and it is a vertical sectional view cut along the rotation center line of the turntable.

[0024] Figure 15 This is a vertical sectional view showing the slider of the pressure plate carriage according to the third embodiment.

[0025] Figure 16 This is a vertical sectional view showing the slider of the pressure plate carriage according to the fourth embodiment.

[0026] In the diagram: 10-Injection molding machine, 100-Mold clamping device, 110-Fixed pressure plate, 120-Modible pressure plate, 196-Temperature adjustment circuit, 197-Temperature sensor, 520-Turntable, 520X-Rotation center line, 610-Sliding plate, 611-Temperature adjustment circuit, 612-Temperature sensor, 620-Sliding plate, 621-Temperature adjustment circuit, 622-Temperature sensor, 630-Slider, 637-Temperature adjustment circuit, 640-Slider, 647-Temperature adjustment circuit, 800-Mold device, 801-First cavity space, 802-Second cavity space, 810-Fixed mold, 820-Modifying mold. Detailed Implementation

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings, the same or corresponding structures are sometimes labeled with the same or corresponding symbols, and descriptions are omitted.

[0028] (Injection molding machine) Figure 1 This is a diagram showing the state of the injection molding machine at the end of mold opening according to one embodiment. Figure 2 This is a diagram showing the state of the injection molding machine during mold closing according to one embodiment. Figure 3 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold is closed. Figure 4 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold opening is completed. Figure 5 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 180° and the mold is closed. Figure 6 This is a horizontal sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 180° and the mold opening is completed. Figure 7 This is a vertical sectional view showing the state of the mold assembly when the rotation angle of the turntable according to one embodiment is 0° and the mold is closed. It is a vertical sectional view cut along the rotation center line of the turntable. Figure 8 This is a diagram showing the sliding plate according to the first embodiment. Additionally, Figure 1 and Figure 2 It is along Figure 3 A vertical sectional view cut along line II.

[0029] In this specification, the X-axis, Y-axis, and Z-axis are perpendicular to each other. The X-axis and Y-axis represent the horizontal direction, and the Z-axis represents the vertical direction. When the mold clamping device 100 is horizontal, the X-axis is the mold opening and closing direction, and the Y-axis is the width direction of the injection molding machine 10. The negative side of the Y-axis is called the operating side, and the positive side of the Y-axis is called the opposite side of the operating side.

[0030] like Figures 1 to 7 As shown, the injection molding machine 10 includes a mold closing device 100 for opening and closing a mold device 800, a first ejection device 201 for ejecting a first unwanted product 23 formed by the mold device 800, a second ejection device 202 for ejecting both a second molded product 22 and a second unwanted product 24 formed by the mold device 800, a first injection device 301 for injecting molding material into the mold device 800, a second injection device 302 for injecting molding material into the mold device 800, a first moving device 401 for moving the first injection device 301 forward and backward relative to the mold device 800, a second moving device (not shown) for moving the second injection device 302 forward and backward relative to the mold device 800, a control device 700 for controlling each component of the injection molding machine 10, and a frame 900 for supporting each component of the injection molding machine 10. The frame 900 includes a mold closing device frame 910 and an injection device frame 920. The mold clamping device frame 910 and the injection device frame 920 are respectively mounted on the base plate 2 via horizontally adjustable casters 930. A control device 700 is arranged inside the injection device frame 920. The components of the injection molding machine 10 will be described below.

[0031] (Mold closing device) In the description of the mold closing device 100, the moving direction of the movable pressure plate 120 when the mold is closed (e.g., the positive X-axis direction) is set to the front, and the moving direction of the movable pressure plate 120 when the mold is opened (e.g., the negative X-axis direction) is set to the rear.

[0032] The mold closing device 100 performs mold closing, pressurization, mold closing, depressurization, and mold opening of the mold device 800. The mold device 800 includes a fixed mold 810 and a moving mold 820.

[0033] The mold clamping device 100 is, for example, horizontal, and the mold opening and closing direction is horizontal. The mold clamping device 100 includes a fixed pressure plate 110, a movable pressure plate 120 configured to move freely relative to the mold clamping device frame 910 along the mold opening and closing direction, and a sliding plate 610 (see reference). Figure 3 , Figure 7 The system includes a turntable 520 rotatably supported by a movable pressure plate 120, a rotation mechanism 530 for rotating the turntable 520, and a moving mechanism 102 for moving the movable pressure plate 120 forward and backward relative to the fixed pressure plate 110. The fixed pressure plate 110 is fixed to the mold clamping device frame 910.

[0034] The fixed pressure plate 110 is fixed to the mold clamping device frame 910. A fixed mold 810 is installed on the surface of the fixed pressure plate 110 opposite to the movable pressure plate 120. For example... Figure 3 As shown, the fixed mold 810 has a first fixed forming surface 811 and a second fixed forming surface 812 on the surface opposite to the moving mold 820.

[0035] The first fixed molding surface 811 is a part of the surface of the first cavity space 801 formed by the first molded article 21. On the other hand, the second fixed molding surface 812 is a part of the surface of the second cavity space 802 formed by the second molded article 22.

[0036] The first fixed molding surface 811 and the second fixed molding surface 812 are formed in different shapes, for example, they are each formed as concave. The fixed mold 810 has a plurality of plates (not shown) stacked along the mold opening and closing direction. Among the plurality of plates constituting the fixed mold 810, the plate that contacts the moving mold 820 is called a template. The first fixed molding surface 811 and the second fixed molding surface 812 are formed on a single template, but they can also be formed on separate templates.

[0037] The movable pressure plate 120 is configured to move freely relative to the mold clamping device frame 910 in the mold opening and closing direction. The rear block 126 of the movable pressure plate 120 is supported by a pressure plate carriage 190. The pressure plate carriage 190 movably mounts the rear block 126 onto the mold device frame 910. A movable mold 820 is mounted on the surface of the movable pressure plate 120 opposite the fixed pressure plate 110 via a turntable 520. Figures 3-8 As shown, the movable pressure plate 120 rotatably supports the rotating shaft 571 of the turntable 520 via the bearing 572.

[0038] The moving mold 820 has a first movable forming surface 821 and a second movable forming surface 822 on the surface opposite to the fixed mold 810. For example... Figure 3 and Figure 5 As shown, the first movable molding surface 821 and the second movable molding surface 822 are respectively formed as a part of the surface forming the first cavity space 801 and a part of the surface forming the second cavity space 802.

[0039] The first movable forming surface 821 and the second movable forming surface 822 are formed with the same shape, for example, they are each formed as a convex shape. The moving mold 820 has a plurality of plates stacked along the mold opening and closing direction. Among the plurality of plates constituting the moving mold 820, the plate that contacts the fixed mold 810 is called a template. The first movable forming surface 821 and the second movable forming surface 822 are formed on a single template, but they can also be formed on separate templates.

[0040] In this embodiment, the first fixed molding surface 811 and the second fixed molding surface 812 are formed in a concave shape, and the first movable molding surface 821 and the second movable molding surface 822 are formed in a convex shape. However, the present invention is not limited to this. That is, the first fixed molding surface 811 and the second fixed molding surface 812 may also be formed in a convex shape, and the first movable molding surface 821 and the second movable molding surface 822 may be formed in a concave shape.

[0041] The turntable 520 is rotatably mounted on the movable pressure plate 120 via a sliding plate 610. The rotation center line 520X of the turntable 520 is parallel to the mold opening and closing direction. The turntable 520 may also be made of cast iron, for example.

[0042] Rotating mechanism 530 (reference) Figure 7 The rotary table 520 is rotated. The rotary mechanism 530 includes a rotary motor 531 and a transmission mechanism 532 that transmits the rotational driving force of the rotary motor 531 to the rotary table 520. Details will be described later, but the transmission mechanism 532 is composed of, for example, a drive gear 533, an intermediate gear 534, and a driven gear 535. Alternatively, the intermediate gear 534 may be omitted, and the drive gear 533 and the driven gear 535 may be connected to each other.

[0043] When the turntable 520 rotates 180°, the direction of rotation of the turntable 520 can be reversed. For example, after the rotating mechanism 530 rotates the turntable 520 180° clockwise, it rotates the turntable 520 180° counterclockwise. The wiring and conduit fixed to the turntable 520 are restored to their original configuration, thus making the handling of wiring and conduit easy.

[0044] like Figure 3 As shown, during mold closing, 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. Molding material is supplied to the first cavity space 801 from the first injection device 301 to form the first molded article 21. Next, the mold is opened.

[0045] Next, as Figure 4 As shown, the first ejection device 201 ejects the first unwanted product 23 from the moving mold 820. The first unwanted product 23 is the portion that is solidified inside the mold assembly 800 together with the first molded product 21. Next, the rotation mechanism 530 rotates the turntable 520 180°. The moving mold 820 rotates 180° along with the rotation of the turntable 520. At this time, the first molded product 21 is not ejected from the moving mold 820 but rotates 180° together with the moving mold 820. Then, as... Figure 5 As shown, the mold is closed.

[0046] Figure 5As shown, during mold closing, 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. As described above, a first molded article 21 is disposed in a portion of the second cavity space 802. Molding material is supplied from the second injection device 302 to the remaining portion of the second cavity space 802 to form a second molded article 22. The case where the second molded article 22 includes the first molded article 21 will be described. The first molded article 21 is formed in parallel with the molding of the second molded article 22. The first molded article 21 is formed in the first cavity space 801. Next, the mold is opened.

[0047] Next, as Figure 6 As shown, the second ejection device 202 ejects both the second molded product 22 and the second unwanted product 24 from the driven mold 820. The second unwanted product 24 is the part that is cured together with the second molded product 22 inside the mold device 800. After the second unwanted product 24 is ejected from the driven mold 820, it separates from the second molded product 22. The ejection of the first unwanted product 23 is performed in parallel with the ejection of the second molded product 22 and the second unwanted product 24. Then, the mold is opened, and the turntable 520 rotates 180° again.

[0048] Mainly such as Figure 3 and Figure 5 As shown, the movable pressure plate 120 has a front surface plate 121 that rotatably supports the turntable 520 via a sliding plate 610, an intermediate block 124 disposed radially inside the cylindrical portion 524 of the turntable 520, a gear limiting block 125 disposed outside the intermediate block 124 when viewed in the mold opening and closing direction, a rear block 126 disposed behind the intermediate block 124, and an elbow rod mounting portion 128 disposed on the rear end face of the rear block 126 (see reference). Figure 7 The front panel 121, the middle block 124, the rear block 126, and the toggle rod mounting part 128 can be formed separately and connected, or they can be formed integrally by casting or the like. The movable pressure plate 120 can also be made of cast iron, for example.

[0049] The front surface plate 121 rotatably supports the turntable 520 via the sliding plate 610. A first rod hole 122 is formed in the front surface plate 121, penetrating the front surface plate 121 in the mold opening and closing direction. A first ejector rod 211 is rotatably disposed in the first rod hole 122. Furthermore, a second rod hole 123 is formed in the front surface plate 121, penetrating the front surface plate 121 in the mold opening and closing direction. A second ejector rod 212 is rotatably disposed in the second rod hole 123.

[0050] An intermediate block 124 is disposed radially inside the cylindrical portion 524 of the turntable 520. The intermediate block 124, for example, has a cylindrical shape that is confined inside the cylindrical portion 524 of the turntable 520 when viewed in the mold opening / closing direction. A space for arranging the first ejector 201 and a space for arranging the second ejector 202 are formed inside the intermediate block 124. A front surface plate 121 is mounted on the front end face of the intermediate block 124. An insertion hole 127 is formed in the front surface plate 121 and the intermediate block 124 for inserting the rotating shaft 571 of the turntable 520 via a bearing 572.

[0051] The rear block 126 is located behind the middle block 124 and is supported by the pressure plate carriage 190 (see reference). Figure 1 and Figure 2 The rear block 126 has, for example, a rectangular shape. A space for arranging the first ejector 201 and a space for arranging the second ejector 202 are formed inside the rear block 126. An intermediate block 124 is mounted on the front end face of the rear block 126.

[0052] The gear limiting block 125 is positioned in front of the rear block 126. Viewed in the mold opening / closing direction, the gear limiting block 125 is positioned outside the middle block 124. The gear limiting block 125 restricts the forward movement of the driven gear 535 via the sliding plate 620. The gear limiting block 125 prevents the turntable 520 from tipping over.

[0053] Toggle lever mounting part 128 (reference) Figure 7 On the rear end face of the rear block 126, a pair of elbow rod mounting portions 128 are provided vertically. Each pair has multiple elbow rod mounting plates spaced apart in the horizontal direction, with their thickness directions oriented horizontally. The multiple elbow rod mounting plates protrude rearward from the rear end face of the rear block 126 and have pin holes 129 at their front ends. A pin is inserted into the pin hole 129. The first connecting rod 152 (reference) Figure 1 and Figure 2 It is freely mounted on the elbow rod mounting part 128 via a pin.

[0054] like Figure 8As shown, the sliding plate 610 is detachably fixed to the front end face of the front surface plate 121, for example, using bolts 613. Multiple sliding plates 610 can also be used (e.g., two). The material of the sliding plate 610 is a softer material than the disc portion 523 of the turntable 520, such as copper or a copper alloy like brass. A temperature regulating circuit 611 for adjusting the flow of a temperature regulating medium to regulate the temperature of the sliding plate 610 is formed in the front surface plate 121 and the rear block 126. Viewed in the mold opening / closing direction, the temperature regulating circuit 611 has one end and another end near the lower end of the sliding plate 610, for example. Furthermore, the temperature regulating circuit 611 extends upward from one end and the other end, and the portion extending upward from one end and the portion extending upward from the other end are connected to each other near the upper end of the sliding plate 610. The temperature regulating circuit 611 may also have one end near the lower end of the sliding plate 610 and another end near the upper end of the sliding plate 610, and meander between them. Viewed from the mold opening / closing direction, the temperature adjustment circuit 611 can also be located near the center of the sliding plate 610. Water, for example, is used as the temperature adjustment medium. The temperature adjustment medium is supplied from the supply port of the temperature adjustment circuit 611 into the temperature adjustment circuit 611, exchanges heat with the movable pressure plate 120 and the sliding plate 610, and is discharged from the outlet of the temperature adjustment circuit 611. Furthermore, temperature sensors 612 are provided in the front surface plate 121 and the rear block 126. The temperature sensors 612 send signals indicating their detection results to the control device 700. The control device 700 can infer the temperature of the sliding plate 610 based on the signals sent from the temperature sensors 612.

[0055] like Figure 8As shown, the sliding plate 620 is detachably fixed to the surface of the gear limiting block 125 opposite to the driven gear 535, for example, using bolts (not shown). The rear end face of the sliding plate 620 contacts the front end face of the driven gear 535. Details will be described later, but during the mold rotation process, the rear end face of the sliding plate 620 and the front end face of the driven gear 535 slide against each other. Therefore, lubricating oil can also be supplied between the rear end face of the sliding plate 620 and the front end face of the driven gear 535. Multiple gear limiting blocks 125 and sliding plates 620 can also be used (e.g., three). The material of the sliding plate 620 is, for example, a copper alloy such as brass. A temperature regulating circuit 621 is formed in the gear limiting block 125 to regulate the flow of a temperature regulating medium for adjusting the temperature of the sliding plate 620. Water is used as the temperature regulating medium, for example. The temperature regulating medium is supplied from the supply port of the temperature regulating circuit 621 into the temperature regulating circuit 621, exchanges heat with the movable pressure plate 120 and the sliding plate 620, and is discharged from the outlet of the temperature regulating circuit 621. Furthermore, a temperature sensor 622 is provided within the gear limiting block 125. The temperature sensor 622 sends a signal indicating its detection result to the control device 700. The control device 700 can infer the temperature of the sliding plate 620 based on the signal sent from the temperature sensor 622.

[0056] Mobile mechanism 102 (reference) Figure 1 and Figure 2 The mold device 800 performs mold closing, pressure increase, mold closing, pressure release, and mold opening by moving the movable pressure plate 120 relative to the fixed pressure plate 110. The moving mechanism 102 includes an toggle seat 130, a connecting rod 140, a toggle mechanism 150, a mold closing motor 160, a motion conversion mechanism 170, and a mold thickness adjustment mechanism 180.

[0057] The toggle seat 130 is spaced apart from the fixed pressure plate 110 and is mounted on the mold clamping device frame 910, which is movable freely in the mold opening and closing direction. Alternatively, the toggle seat 130 can also be configured to move freely along the guide members laid on the mold clamping device frame 910.

[0058] In addition, in this embodiment, the fixed pressure plate 110 is fixed to the mold clamping device frame 910, and the toggle seat 130 can move freely relative to the mold clamping device frame 910 in the mold opening and closing direction. However, it can also be configured such that the toggle seat 130 is fixed to the mold clamping device frame 910, and the fixed pressure plate 110 can move freely relative to the mold clamping device frame 910 in the mold opening and closing direction.

[0059] Connecting rods 140 connect the fixed pressure plate 110 and the toggle seat 130 at a distance L along the mold opening and closing direction. Multiple connecting rods 140 can be used (e.g., four). The multiple connecting rods 140 are configured parallel to the mold opening and closing direction and extend according to the clamping force. At least one connecting rod 140 can be equipped with a connecting rod strain detector 141 to detect the strain of the connecting rod 140. The connecting rod strain detector 141 sends a signal indicating its detection result to the control device 700. The detection result of the connecting rod strain detector 141 is used for detecting the clamping force, etc.

[0060] Furthermore, in this embodiment, a connecting rod strain gauge 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 a strain gauge and can be piezoelectric, capacitance, hydraulic, or electromagnetic, etc., and its installation position is not limited to the connecting rod 140.

[0061] A toggle mechanism 150 is positioned between a movable pressure plate 120 and a toggle seat 130, allowing the movable pressure plate 120 to move relative to the toggle seat 130 in the mold opening and closing direction. The toggle mechanism 150 comprises a crosshead 151 and a pair of connecting rods. Each pair of connecting rods has a first connecting rod 152 and a second connecting rod 153, which are telescopically connected by pins or the like. The first connecting rod 152 is mounted to pivot freely relative to the movable pressure plate 120 via pins or the like. The second connecting rod 153 is mounted to pivot freely relative to the toggle seat 130 via pins or the like. The second connecting rod 153 is mounted to the crosshead 151 via a third connecting rod 154. When the crosshead 151 moves forward or backward relative to the toggle seat 130, the first connecting rod 152 and the second connecting rod 153 extend or retract, and the movable pressure plate 120 moves forward or backward relative to the toggle seat 130.

[0062] Furthermore, the structure of the toggle mechanism 150 is not limited to Figure 1 and Figure 2 The structure shown. For example, in Figure 1 and Figure 2 In this configuration, each link group has 5 nodes, but it can also have 4. One end of the third link 154 can also be connected to the node between the first link 152 and the second link 153.

[0063] The clamping motor 160 is mounted on the toggle seat 130 and operates the toggle mechanism 150. The clamping motor 160 causes the first link 152 and the second link 153 to extend and retract relative to the toggle seat 130 by moving the crosshead 151 forward and backward, and also causes the movable pressure plate 120 to move forward and backward relative to the toggle seat 130. The clamping motor 160 is directly connected to the motion conversion mechanism 170, but can also be connected to the motion conversion mechanism 170 via a belt, pulley, etc.

[0064] The motion conversion mechanism 170 converts the rotary motion of the clamping motor 160 into the linear motion of the crosshead 151. The motion conversion mechanism 170 includes a lead screw shaft and a lead screw nut screwed onto the lead screw shaft. Ball bearings or rollers can be clamped between the lead screw shaft and the lead screw nut.

[0065] Under the control of the control device 700, the mold closing device 100 performs mold closing, pressurization, mold closing, depressurization, mold opening, ejection, and mold rotation processes. The mold rotation process is performed after the mold opening process ends and before the next mold closing process begins. In this embodiment, the mold rotation process is performed after the ejection process ends, but it can also be performed before the ejection process ends. For example, when the position where the second molded article 22 is formed is different from the position where the second molded article 22 is ejected, the mold rotation process is performed after the mold opening process ends, and then the ejection process is performed. Specifically, for example, when the position where the second molded article 22 is formed is the operating side, and the position where the second molded article 22 is ejected is the opposite side of the operating side, the mold rotation process is performed after the mold opening process ends, and then the ejection process is performed.

[0066] In the mold closing process, the crosshead 151 is advanced to the mold closing end position at a set speed by driving the mold closing motor 160, thereby advancing the movable pressure plate 120 and bringing the moving mold 820 into contact with the fixed mold 810. The position and speed of the crosshead 151 are detected, for example, using a mold closing motor encoder 161. The mold closing motor encoder 161 detects the rotation of the mold closing motor 160 and sends a signal indicating its detection result to the control device 700.

[0067] Furthermore, the crosshead position detector for detecting the position of the crosshead 151 and the crosshead movement speed detector for detecting the movement speed of the crosshead 151 are not limited to the mold clamping motor encoder 161; conventional detectors can be used. Similarly, the movable platen position detector for detecting the position of the movable platen 120 and the movable platen movement speed detector for detecting the movement speed of the movable platen 120 are not limited to the mold clamping motor encoder 161; conventional detectors can be used.

[0068] In the pressurization process, the mold clamping motor 160 is further driven to advance the crosshead 151 from the mold closing end position to the mold closing position, thereby generating a mold clamping force.

[0069] During the mold closing process, the mold closing motor 160 is driven to maintain the position of the crosshead 151 in the mold closing position. During the mold closing process, the mold closing force generated by the pressurization process is maintained. During the mold closing process, a first cavity space 801 and a second cavity space 802 are formed between the moving mold 820 and the fixed mold 810.

[0070] During the depressurization process, the mold closing motor 160 is driven to retract the crosshead 151 from the mold closing position to the mold opening start position, thereby causing the movable pressure plate 120 to retract and reduce the mold closing force. The mold opening start position and the mold closing end position can be the same position.

[0071] In the mold opening process, the mold closing motor 160 is driven to cause the crosshead 151 to move backward from the mold opening start position to the mold opening end position at a set moving speed, thereby causing the movable pressure plate 120 to move backward and the moving mold 820 to separate from the fixed mold 810.

[0072] After the mold opening process is completed and before the next mold closing process begins, an ejection process is performed. During the ejection process, the first ejection device 201 ejects the first unwanted product 23 from the driven mold 820. The first molded product 21, which is cured together with the first unwanted product 23, is not ejected from the driven mold 820. Furthermore, during the ejection process, the second ejection device 202 ejects both the second molded product 22 and the second unwanted product 24 from the driven mold 820. After the ejection process is completed and before the next mold closing process begins, a mold rotation process is performed.

[0073] In the mold rotation process, the rotary table 520 rotates together with the moving mold 820 to rotate the first molded article 21. Then, through the mold closing process and the pressure increase process, the first molded article 21 is placed in the second cavity space 802.

[0074] The setting conditions in the mold closing process, the pressure raising process, and the mold closing process are set uniformly as a series of setting conditions. For example, the moving speed, position (including the mold closing start position, moving speed switching position, mold closing end position, and mold closing position) and mold closing force of the crosshead 151 in the mold closing process and the pressure raising process are set uniformly as a series of setting conditions. The mold closing start position, moving speed switching position, mold closing end position, and mold closing position are arranged sequentially from back to front, and represent the start and end points of the interval for setting the moving speed. The moving speed is set for each interval. There can be one or more moving speed switching positions. Alternatively, no moving speed switching position can be set. It is also possible to set only either the mold closing position or the mold closing force.

[0075] The settings for the depressurization and mold opening processes are also set in the same way. For example, the moving speed and position (mold opening start position, moving speed switching position, and mold opening end position) of the crosshead 151 in the depressurization and mold opening processes are set uniformly as a series of settings. The mold opening start position, moving speed switching position, and mold opening end position are arranged sequentially from front to back, and represent the start and end points of the range for setting the moving speed. The moving speed is set for each range. There can be one or more moving speed switching positions. Alternatively, no moving speed switching position can be set. The mold opening start position and the mold closing end position can be the same position. Furthermore, the mold opening end position and the mold closing start position can be the same position.

[0076] In addition, the moving speed and position of the movable pressure plate 120 can be set instead of the moving speed and position of the crosshead 151. Furthermore, the clamping force can be set instead of the position of the crosshead (e.g., the mold closing position) and the position of the movable pressure plate.

[0077] However, the toggle mechanism 150 amplifies the driving force of the clamping motor 160 and transmits it to the movable pressure plate 120. This amplification factor is also known as the toggle ratio. The toggle ratio varies depending on the angle θ (hereinafter also referred to as "link angle θ") formed by the first link 152 and the second link 153. The link angle θ is determined by the position of the crosshead 151. The toggle ratio reaches its maximum when the link angle θ is 180°.

[0078] When the thickness of the mold assembly 800 changes due to replacement of the mold assembly 800, temperature changes of the mold assembly 800, etc., mold thickness adjustment is performed to obtain the specified mold closing force during mold closing. In mold thickness adjustment, for example, the distance L between the fixed pressure plate 110 and the toggle seat 130 is adjusted so that the linkage angle θ of the toggle mechanism 150 is a specified angle at the moment of mold contact between the moving mold 820 and the fixed mold 810.

[0079] The mold clamping device 100 includes a mold thickness adjustment mechanism 180. The mold thickness adjustment mechanism 180 adjusts the mold thickness by adjusting the distance L between the fixed pressure plate 110 and the toggle seat 130. Furthermore, the timing of the mold thickness adjustment is performed, for example, during the period from the end of the molding cycle to the start of the next molding cycle. The mold thickness adjustment mechanism 180 includes, for example, a lead screw shaft 181 formed at the rear end of the connecting rod 140, a lead screw nut 182 that is rotatably and non-retractably held in the toggle seat 130, and a mold thickness adjustment motor 183 that rotates the lead screw nut 182 screwed to the lead screw shaft 181.

[0080] Each connecting rod 140 is provided with a lead screw shaft 181 and a lead screw nut 182. The rotational driving force of the die thickness adjustment motor 183 can be transmitted to multiple lead screw nuts 182 via the rotational driving force transmission unit 185. Multiple lead screw nuts 182 can be rotated synchronously. Alternatively, multiple lead screw nuts 182 can be rotated individually by changing the transmission path of the rotational driving force transmission unit 185.

[0081] The rotary drive force transmission unit 185 is, for example, composed of gears. In this case, a driven gear is formed on the outer periphery of each lead screw nut 182, a drive gear is mounted on the output shaft of the die thickness adjustment motor 183, and an intermediate gear that meshes with multiple driven gears and drive gears is rotatably held at the center of the toggle seat 130. Alternatively, the rotary drive force transmission unit 185 may be composed of belts, pulleys, etc., instead of gears.

[0082] The operation of the die thickness adjustment mechanism 180 is controlled by the control device 700. The control device 700 drives the die thickness adjustment motor 183, causing the lead screw nut 182 to rotate. As a result, the position of the toggle seat 130 relative to the connecting rod 140 is adjusted, and the distance L between the fixed pressure plate 110 and the toggle seat 130 is adjusted. Alternatively, multiple die thickness adjustment mechanisms can be used in combination.

[0083] The interval L is detected using a die thickness adjustment motor encoder 184. The die thickness adjustment motor encoder 184 detects the rotation amount and direction of the die thickness adjustment motor 183 and sends a signal indicating the detection result to the control device 700. The detection result of the die thickness adjustment motor encoder 184 is used for monitoring and controlling the position of the toggle seat 130 and the interval L. However, the toggle seat position detector for detecting the position of the toggle seat 130 and the interval detector for detecting the interval L are not limited to the die thickness adjustment motor encoder 184; conventional detectors can be used.

[0084] In addition, the mold closing device 100 in this embodiment is a horizontal type with the mold opening and closing direction in the horizontal direction, but it can also be a vertical type with the mold opening and closing direction in the vertical direction.

[0085] Furthermore, the mold clamping device 100 of this embodiment has a mold clamping motor 160 as a drive source, but a hydraulic cylinder may be used instead of the mold clamping motor 160. Also, the mold clamping device 100 may have a linear motor for mold opening and closing, or it may have an electromagnet for mold clamping.

[0086] (First ejection device and second ejection device) In the description of the first ejection device 201 and the second ejection device 202, similar to the description of the mold closing device 100, the moving direction of the movable pressure plate 120 when the mold is closed (e.g., the positive X-axis direction) is set to the front, and the moving direction of the movable pressure plate 120 when the mold is opened (e.g., the negative X-axis direction) is set to the rear.

[0087] The first ejection device 201 and the second ejection device 202 move forward and backward together with the movable pressure plate 120. For example... Figure 4 As shown, the first ejection device 201 ejects the first unwanted product 23 from the driven mold 820. The first ejection device 201 does not eject the first molded product 21, which is cured together with the first unwanted product 23. Figure 6 As shown, the second ejection device 202 ejects the second molded product 22 and the second unwanted product 24 from the driven mold 820.

[0088] The first ejection device 201 and the second ejection device 202 are arranged at intervals along the Y-axis. This is because the first cavity space 801 and the second cavity space 802 are arranged at intervals along the Y-axis.

[0089] For example, a first cavity space 801 and a first ejection device 201 are arranged on the operating side. A second cavity space 802 and a second ejection device 202 are arranged on the opposite side of the operating side. The second molded article 22 can be removed to the opposite side of the operating side.

[0090] First, the main reference Figure 4 and Figure 6 The structure of the moving mold 820 will be described. The moving mold 820 has a fixed part 830 fixed to the movable pressure plate 120 and a movable part 860 that can move in and out within the fixed part 830. The movable part 860 has a first movable part 840 and a second movable part 850.

[0091] The fixing part 830 is configured to be rotationally symmetrical about the rotation center line 520X of the turntable 520 (e.g., 180° rotational symmetry). The fixing part 830 includes a movable mounting plate 831 mounted on the turntable 520, a pad 835 forming a space 834 in front of the movable mounting plate 831, a movable template 836 fixed to the movable mounting plate 831 via the pad 835, and a guide pin 839.

[0092] Through holes 832 are formed in the movable mounting plate 831 for sequentially inserting and removing the first ejector rod 211 and the second ejector rod 212. The diameter of the through holes 832 is larger than the diameters of the first ejector rod 211 and the second ejector rod 212. The through holes 832 are configured to be rotationally symmetrical about the rotation center line 520X of the turntable 520 (e.g., 180° rotationally symmetrical).

[0093] The pad 835 forms a space 834 between the movable mounting plate 831 and the movable template 836. The first ejector plate 841 and the second ejector plate 851, described later, are freely positioned in this space 834.

[0094] The movable template 836 has a first movable forming surface 821 and a second movable forming surface 822 on the surface opposite to the fixed mold 810. The first movable forming surface 821 and the second movable forming surface 822 are respectively formed as a part of the surface forming the first cavity space 801 and a part of the surface forming the second cavity space 802.

[0095] Multiple (e.g., a pair) of the first movable parts 840 are arranged rotationally symmetrically (e.g., 180° rotationally symmetrically) around the rotation center line 520X of the turntable 520. Both the first unwanted item 23 and the second unwanted item 24 can be ejected via the first movable parts 840. The first movable part 840 includes, for example, a first ejector plate 841 configured perpendicular to the mold opening and closing direction and a rod-shaped first ejector pin 842 extending forward from the first ejector plate 841.

[0096] The first ejector plate 841 is positioned in the space 834 between the movable mounting plate 831 and the movable template 836. The first ejector plate 841 moves forward and backward along the guide pin 839, which is parallel to the mold opening and closing direction. The first ejector plate 841 is subjected to force in a direction away from the movable template 836 by the first return spring 845.

[0097] The first ejector pin 842 is freely positioned in the first pin hole that passes through the movable template 836 along the mold opening and closing direction. The front end face of the first ejector pin 842 abuts against the first unwanted item 23 or the second unwanted item 24.

[0098] Similar to the first movable part 840, multiple (e.g., a pair) of second movable parts 850 are arranged in a rotationally symmetrical manner (e.g., 180° rotationally symmetrical) around the rotation center line 520X of the turntable 520. The second movable part 850 includes, for example, a second ejector plate 851 configured perpendicular to the mold opening and closing direction and a rod-shaped second ejector pin 852 extending forward from the second ejector plate 851.

[0099] The second ejector plate 851 is positioned in the space 834 between the movable mounting plate 831 and the movable template 836. The second ejector plate 851 moves forward and backward along the guide pin 839, which is parallel to the mold opening and closing direction. The second ejector plate 851 is subjected to force in a direction away from the movable template 836 by the second return spring 855.

[0100] The second ejector plate 851 is positioned between the movable mounting plate 831 and the first ejector plate 841. When the second ejector plate 851 moves forward or backward, the first ejector plate 841 and the second ejector plate 851 move forward or backward together.

[0101] A through hole 856 is formed in the second ejector plate 851, extending through the second ejector plate 851 in the mold opening and closing direction. The diameter of the through hole 856 is smaller than the diameter of the second ejector rod 212. The second ejector rod 212 does not penetrate the through hole 856 of the second ejector plate 851, but instead presses the second ejector plate 851 forward.

[0102] The diameter of the through hole 856 of the second ejector plate 851 is larger than the diameter of the first ejector rod 211. The first ejector rod 211 passes through the through hole 856 of the second ejector plate 851 and presses the first ejector plate 841 forward.

[0103] The second ejector pin 852 is freely positioned in the second pin hole that passes through the movable template 836 along the mold opening and closing direction. The front end face of the second ejector pin 852 abuts against the first molded part 21 or the second molded part 22.

[0104] Next, refer to Figure 4 The structure of the first ejection device 201 will be described. The first ejection device 201 has a first ejection rod 211 that moves forward and backward relative to the fixed part 830 of the moving mold 820. The first ejection rod 211 is not connected to the first movable part 840 and the second movable part 850 of the moving mold 820. The moving mold 820 can be rotated by moving the first ejection rod 211 away from the moving mold 820.

[0105] The first ejection device 201 has a first drive mechanism 220 for moving the first ejection rod 211 forward and backward. The first drive mechanism 220 includes, for example, a first ejection motor 221, a first crosshead 223, and a first motion conversion mechanism 225 for converting the rotational motion of the first ejection motor 221 into the linear motion of the first crosshead 223.

[0106] The first motion conversion mechanism 225 includes a lead screw shaft and a lead screw nut screwed to the lead screw shaft. Ball bearings or rollers can be clamped between the lead screw shaft and the lead screw nut. The first crosshead 223 moves along the first guide rod 224 in the mold opening and closing direction. The rear end of the first ejector rod 211 is installed in the first crosshead 223, and the first ejector rod 211 moves forward and backward together with the first crosshead 223.

[0107] like Figure 4 As shown, if the first drive mechanism 220 advances the first ejector rod 211, the first ejector rod 211 passes through the through hole 832 of the movable mounting plate 831 and the through hole 856 of the second ejector plate 851, and presses the first ejector plate 841 forward. As a result, the first ejector plate 841 advances against the force of the first return spring 845. Therefore, the first ejector pin 842 advances, and the driven mold 820 ejects the first unwanted item 23.

[0108] like Figure 4 As shown, during the period when the first drive mechanism 220 moves the first ejector plate 841 and the first ejector rod 211 forward together, the second ejector plate 851 is held in the backward limit position by the force of the second return spring 855 and thus does not move forward. Therefore, when the first unwanted product 23 is ejected from the driven mold 820, the first molded product 21 is not ejected from the driven mold 820.

[0109] Then, if the first drive mechanism 220 causes the first ejector rod 211 to retract, the first ejector plate 841 will retract to the retraction limit position due to the force of the first return spring 845. If the first ejector plate 841 reaches the retraction limit position, the front end face of the first ejector pin 842 will be flush with the front end face of the moving mold 820.

[0110] When the first ejector lever 211 is moved forward or backward, the control device 700 controls the position of the first ejector lever 211. The position of the first ejector lever 211 is detected, for example, using the 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 its detection result to the control device 700. Alternatively, the first ejector lever position detector for detecting the position of the first ejector lever 211 is not limited to the first ejector motor encoder 222; a conventional detector can be used.

[0111] Next, refer to Figure 6 The structure of the second ejection device 202 will be described. The second ejection device 202 has a second ejection rod 212 that moves forward and backward relative to the fixed part 830 of the moving mold 820. The second ejection rod 212 is not connected to the first movable part 840 and the second movable part 850 of the moving mold 820. The moving mold 820 can be rotated by moving the second ejection rod 212 away from the moving mold 820.

[0112] The second ejection device 202 has a second drive mechanism 230 for moving the second ejection rod 212 forward and backward. The second drive mechanism 230 includes, for example, a second ejection motor 231, a second crosshead 233, and a second motion conversion mechanism 235 for converting the rotational motion of the second ejection motor 231 into the linear motion of the second crosshead 233.

[0113] The second motion conversion mechanism 235 includes a lead screw shaft and a lead screw nut screwed to the lead screw shaft. Ball bearings or rollers can be clamped between the lead screw shaft and the lead screw nut. The second crosshead 233 moves along the second guide rod 234 in the mold opening and closing direction. The rear end of the second ejector rod 212 is installed in the second crosshead 233, and the second ejector rod 212 moves forward and backward together with the second crosshead 233.

[0114] like Figure 6 As shown, if the second drive mechanism 230 advances the second ejector rod 212, the second ejector rod 212 passes through the through hole 832 of the movable mounting plate 831 and presses the edge of the through hole 856 of the second ejector plate 851 forward. As a result, the second ejector plate 851 advances against the force of the second return spring 855. Therefore, the second ejector pin 852 advances, ejecting the second molded article 22 from the driven mold 820.

[0115] During the period when the second drive mechanism 230 moves the second ejector plate 851 and the second ejector rod 212 forward together, the first ejector plate 841 moves forward against the force of the first return spring 845. Therefore, the first ejector pin 842 moves forward, and the driven mold 820 ejects the second unwanted item 24.

[0116] Then, if the second drive mechanism 230 causes the second ejector rod 212 to retract, the second ejector plate 851 will retract to the retraction limit position due to the force of the second return spring 855. If the second ejector plate 851 reaches the retraction limit position, the front end face of the second ejector pin 852 will be flush with the front end face of the moving mold 820.

[0117] During the retraction of the second ejector plate 851, the first ejector plate 841 retracts to the retraction limit position due to the force of the first return spring 845. If the first ejector plate 841 reaches the retraction limit position, the front end face of the first ejector pin 842 is flush with the front end face of the moving mold 820.

[0118] When the second ejector lever 212 is moved forward or backward, the control device 700 controls the position of the second ejector lever 212. The position of the second ejector lever 212 is detected, for example, using 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 its detection result to the control device 700. Furthermore, the second ejector lever position detector for detecting the position of the second ejector lever 212 is not limited to the second ejector motor encoder 232; conventional detectors can be used.

[0119] (Channel changer) In the description of the turntable 520, similar to the description of the mold closing device 100, the direction of movement of the movable pressure plate 120 when the mold is closed (e.g., the positive X-axis direction) is set to the front, and the direction of movement of the movable pressure plate 120 when the mold is opened (e.g., the negative X-axis direction) is set to the rear. Figure 9 This is a diagram showing the state of the flexible retainer when the rotation angle of the turntable according to one embodiment is 0°. Figure 10 This is a diagram showing the state of the flexible retainer when the rotation angle of the turntable according to one embodiment is 180°.

[0120] The turntable 520 has a rotating shaft 571. The rotating shaft 571 is inserted into the insertion holes 127 of the front surface plate 121 and the intermediate block 124 via bearings 572. That is, the rotating shaft 571 is rotatably supported by the movable pressure plate 120. The rotation center line 520X of the turntable 520 is parallel to the mold opening and closing direction. The rotation direction of the turntable 520 is a first direction D1 and a second direction D2 opposite to the first direction D1. The turntable 520 also has, for example, a mold mounting part 521 and a winding part 522. The winding part 522 includes a disc part 523 that fixes the mold mounting part 521 and a cylindrical part 524 that extends rearward from the outer periphery of the disc part 523.

[0121] The mold mounting part 521 is the part for mounting the moving mold 820. The mold mounting part 521 is formed as a plate perpendicular to the mold opening and closing direction. When viewed from the mold opening and closing direction, the moving mold 820 is often formed as a rectangle, therefore the mold mounting part 521 is also formed as a rectangle.

[0122] Furthermore, when viewed from the mold opening and closing direction, the moving mold 820 forms a rectangle because... Figure 3 As shown, there are many cases where the first movable forming surface 821 and the second movable forming surface 822 are formed with a gap between them and the long side of the moving mold 820.

[0123] The mold mounting part 521 is configured so as not to interfere with the four connecting rods 140 when rotating. Specifically, when viewed in the mold opening and closing direction, the mold mounting part 521 is located inside the inscribed circle of the four connecting rods 140.

[0124] The take-up section 522 is the part that takes up the flexible retainer 500. If the turntable 520 rotates in the first direction D1, the flexible retainer 500 is taken up in the take-up section 522. And if the turntable 520 rotates in the second direction D2, the flexible retainer 500 is unwound from the take-up section 522.

[0125] like Figure 7 As shown, the take-up portion 522 is positioned relative to the mold mounting portion 521 on the side opposite to the moving mold 820, for example, on the negative side of the mold mounting portion 521 in the X-axis direction. The take-up portion 522 includes a disc portion 523 that fixes the mold mounting portion 521 and a cylindrical portion 524 that extends from the outer periphery of the disc portion 523 toward the negative side in the X-axis direction. The rear end face of the disc portion 523 contacts the front end face of the sliding plate 610. Details will be described later, but during the mold rotation process, the rear end face of the disc portion 523 and the front end face of the sliding plate 610 slide against each other. Therefore, lubricating oil can also be supplied between the rear end face of the disc portion 523 and the front end face of the sliding plate 610.

[0126] The cylindrical portion 524 has a circumferential surface 525. A driven gear 535 is fixed along the entire circumferential direction on the circumferential surface 525. The driven gear 535 is part of a transmission mechanism 532 that transmits the rotational driving force of the rotary motor 531 to the turntable 520. Furthermore, the structure of the transmission mechanism 532 can be a conventional structure and is not limited to... Figure 7 The structure shown.

[0127] The winding section 522 has a circumferential surface 525. This circumferential surface 525 is disposed at a constant distance from the rotation center line 520X of the turntable 520. A flexible retainer 500 is wound onto this circumferential surface 525. The flexible retainer 500 deforms along the circumferential surface 525. Regardless of the rotation angle of the turntable 520, the radius of curvature of the deformed portion can be kept constant. Therefore, regardless of the rotation angle of the turntable 520, the magnitude of the stress generated by bending deformation can be kept constant.

[0128] One end 501 of the flexible retainer 500 is fixed to the turntable 520, and the other end 502 is fixed to the movable pressure plate 120. One end 501 of the flexible retainer 500 can be directly fixed to the turntable 520, or it can be fixed to the turntable 520 via a specified component. Similarly, the other end 502 of the flexible retainer 500 can be directly fixed to the movable pressure plate 120, or it can be fixed to the movable pressure plate 120 via a specified component (e.g., guide 550).

[0129] The flexible retainer 500 deforms along the turntable 520 and the guide 550, and retains the multiple linear bodies 580. This prevents the multiple linear bodies 580 from rubbing against each other. For example, a cable drag chain (registered trademark) can be used as the flexible retainer 500.

[0130] like Figure 3 As shown, the flexible retainer 500 has a plurality of pins 511 arranged parallel to each other and a plurality of annular portions 512 connected linearly by the pins 511. The flexible retainer 500 holds a plurality of linear bodies 580 inside the plurality of annular portions 512. Adjacent annular portions 512 are rotatably connected relative to each other about a pin 511. The axial direction of the pin 511 is the mold opening and closing direction (e.g., the X-axis direction).

[0131] The annular portion 512 has a pair of connecting rod portions 513 spaced apart along the mold opening and closing direction, and a pair of arm portions 514 connecting the pair of connecting rod portions 513. A pin portion 511 protrudes outward from the pair of connecting rod portions 513 and is inserted into a hole formed in another pair of connecting rod portions 513. Thus, adjacent annular portions 512 are rotatably connected relative to each other about the pin portion 511, and are relatively immovably connected along the mold opening and closing direction. This allows the flexible retaining member 500 to deform in a plane perpendicular to the mold opening and closing direction.

[0132] Furthermore, the flexible retainer 500 only needs to hold multiple linear bodies 580, and the structure of the flexible retainer 500 is not particularly limited. For example, the flexible retainer 500 can also be made of a resin tube.

[0133] A portion of the linear body 580 is, for example, a flexible wiring. As a flexible wiring, it can be a low-voltage wire that transmits electrical signals or a high-voltage wire that supplies power. For example, a low-voltage wire transmits electrical signals from a sensor that measures the temperature of the moving mold 820. A high-voltage wire supplies power, for example, to a heater embedded in the moving mold 820.

[0134] A portion of the linear body 580 is, for example, a flexible conduit connected to temperature regulation circuits 611 and 621. This flexible conduit delivers a temperature regulation medium that adjusts the temperature of the sliding plates 610 and 620. As described above, water is used, for example, as the temperature regulation medium.

[0135] The temperature regulating medium is supplied to temperature regulating circuits 611 and 621 via flexible piping. After heat exchange with the movable pressure plate 120, sliding plate 610 and sliding plate 620, the temperature regulating medium is discharged from temperature regulating circuits 611 and 621 and through flexible piping.

[0136] Furthermore, a portion of the linear body 580 can also be other flexible piping. This flexible piping, for example, carries a fluid. The fluid can be either a gas or a liquid. The fluid could be, for example, a temperature regulating medium for adjusting the temperature of the moving mold 820. Water could be used as a temperature regulating medium, for example.

[0137] The temperature regulating medium is supplied to the interior of the moving mold 820 through a flexible conduit. The temperature regulating medium exchanges heat with the moving mold 820, maintaining its temperature at a preset level. Then, the temperature regulating medium is discharged to the outside of the moving mold 820 through a flexible conduit in the return loop.

[0138] Furthermore, the fluid transported by the flexible piping is not limited to a temperature regulating medium that adjusts the temperature of the moving mold 820. For example, the fluid transported by the flexible piping can also be lubricating oil supplied to sliding components.

[0139] Furthermore, the fluid transported by the flexible piping can also be a demolding gas. The demolding gas is sprayed from the surface that is in contact with the second molded article 22, the second unused article 24, or the first unused article 23 of the moving mold 820. This enables the second molded article 22, the second unused article 24, or the first unused article 23 to be demolded from the moving mold 820.

[0140] like Figure 9 and Figure 10As shown, one end of the linear body 580 is detachably connected to the rotary connector 581, and the other end is detachably connected to the fixed connector 582. The rotary connector 581 is provided on the turntable 520. On the other hand, the fixed connector 582 is provided on the movable pressure plate 120. By replacing the linear body 580 with either the rotary connector 581 or the fixed connector 582 when changing the mold assembly 800, a system suitable for the changed mold assembly 800 can be easily constructed.

[0141] However, when viewed in the mold opening / closing direction, the mold mounting portion 521 protrudes outward from the winding portion 522. The mold mounting portion 521 is positioned on the moving mold 820 side (e.g., the positive side in the X-axis direction) with reference to the winding portion 522. When viewed in the mold opening / closing direction, the mold mounting portion 521 overlaps with a portion 504 of the flexible retainer 500. The portion 504 of the flexible retainer 500 is the part of the flexible retainer 500 wound by the winding portion 522.

[0142] like Figure 9 and Figure 10 As shown, the guide 550 is fixed to the movable pressure plate 120. The guide 550 guides the flexible retainer 500. It can limit the deformation of the flexible retainer 500 in an unexpected direction and can prevent the flexible retainer 500 from breaking. One end 501 of the flexible retainer 500 is fixed to the turntable 520, and the other end 502 is fixed to the guide 550.

[0143] When the turntable 520 rotates in the first direction D1 and the second direction D2, the flexible retainer 500 deforms along the guide 550. The shape of the flexible retainer 500 can be controlled by the guide 550, and the range of motion of the flexible retainer 500 can be determined.

[0144] The guide 550 is configured not to obstruct the rotation of the turntable 520. For example... Figure 7 As shown, the guide member 550 includes, for example, a guide groove 551 and a guide groove forming portion 560.

[0145] The guide groove 551 is the part into which the flexible retainer 500 is inserted. The width of the guide groove 551 (dimension in the mold opening and closing direction) is slightly larger than the width of the flexible retainer 500 (dimension in the mold opening and closing direction).

[0146] The guide groove forming part 560 forms a guide groove 551. The guide groove forming part 560 has a first side wall part 561 and a second side wall part 562 arranged at intervals along the mold opening and closing direction, and a bottom wall part 563 connecting the first side wall part 561 and the second side wall part 562.

[0147] like Figure 9 and Figure 10As shown, the bottom wall portion 563 has, for example, a cylindrical surface 564 that is arc-shaped when viewed in the mold opening and closing direction. The flexible retainer 500 deforms along this cylindrical surface 564. Regardless of the rotation angle of the turntable 520, the radius of curvature of the deformed portion can be kept constant. Therefore, regardless of the rotation angle of the turntable 520, the magnitude of the stress generated by bending deformation can be kept constant.

[0148] As described above, the bottom wall portion 563 has a cylindrical surface 564 that is arc-shaped when viewed in the mold opening and closing direction. This cylindrical surface 564 is disposed at a constant distance from the rotation center line 520X of the turntable 520, and at a constant distance from the circumferential surface 525 of the winding portion 522 of the turntable 520. Regardless of the rotation angle of the turntable 520, the radius of curvature of the bent portion of the flexible retainer 500 (the portion bent between the winding portion 522 and the guide member 550) can be kept constant. Therefore, regardless of the rotation angle of the turntable 520, the magnitude of the stress generated by bending deformation can be kept constant.

[0149] like Figure 7 As shown, a discharge hole 565 is formed in the bottom wall portion 563 to discharge the liquid stored inside the guide groove forming portion 560. The discharge hole 565 is, for example, a round hole. Alternatively, the discharge hole 565 can also be a slit hole, and the shape of the discharge hole 565 is not particularly limited.

[0150] The drain hole 565 allows for the discharge of liquids such as temperature regulating medium or lubricating oil that leak during the mold replacement device 800. Liquid leakage during mold replacement occurs because of the replacement of the linear element 580 of the rotary connector 581 or the fixed connector 582. By forming the drain hole 565, liquid does not accumulate inside the guide groove forming portion 560, thus preventing deterioration of the flexible retainer 500 or the linear element 580 due to liquid leakage.

[0151] A discharge hole 565 is formed in the bottom wall portion 563 of the guide groove forming portion 560 disposed below the turntable 520. Viewed in the mold opening / closing direction, the bottom wall portion 563 has a convex, rounded cylindrical surface 564. A discharge hole 565 is formed at the lower end of this cylindrical surface 564. Liquid can be concentrated in the discharge hole 565 by gravity.

[0152] Furthermore, details will be described later, but the guide groove forming portion 560 can also be positioned above the turntable 520, and the discharge hole 565 is not formed in the bottom wall portion 563. This prevents dust and the like from entering the interior of the guide groove forming portion 560 from above.

[0153] The first sidewall portion 561 and the second sidewall portion 562 are arranged at a distance from each other along the mold opening and closing direction. The distance is equal to the width of the guide groove 551. The first sidewall portion 561 is closer to the moving mold 820 than the second sidewall portion 562. The first sidewall portion 561 and the second sidewall portion 562 are each formed as a plate perpendicular to the mold opening and closing direction.

[0154] like Figure 9 and Figure 10 As shown, the first sidewall portion 561 has an outer edge 566 that is arc-shaped when viewed in the mold opening and closing direction, and an inner edge 567 that is arc-shaped when viewed in the mold opening and closing direction. The inner edge 567 is positioned closer to the rotation center line 520X of the turntable 520 than the outer edge 566. When viewed in the mold opening and closing direction, the outer edge 566 and the inner edge 567 are formed on concentric circles centered on the rotation center line 520X of the turntable 520.

[0155] (Injection device 1 and injection device 2) In the description of the first injection device 301 and the second injection device 302, unlike the description of the mold clamping device 100, the direction of movement of the screw 330 during filling (e.g., the negative X-axis direction) is set to forward, and the direction of movement of the screw 330 during metering (e.g., the positive X-axis direction) is set to rearward.

[0156] A first injection device 301 is disposed on a first sliding base 303, the first sliding base 303 being configured to move freely forward and backward relative to the injection device frame 920. The first injection device 301 is configured to move freely forward and backward relative to the mold assembly 800. The first injection device 301 contacts the mold assembly 800 (more specifically, the fixed mold 810) and fills the first cavity space 801 within the mold assembly 800 with molding material.

[0157] The second injection device 302 is disposed on the second sliding base, which is configured to move freely forward and backward relative to the injection device frame 920. The second injection device 302 is configured to move freely forward and backward relative to the mold assembly 800. The second injection device 302 contacts the mold assembly 800 (more specifically, the fixed mold 810) and fills the second cavity space 802 within the mold assembly 800 with molding material.

[0158] The first injection device 301 and the second injection device 302 are arranged at intervals along the Y-axis. This is because the first cavity space 801 and the second cavity space 802 are arranged at intervals along the Y-axis. The molding material filled by the first injection device 301 in the first cavity space 801 and the molding material filled by the second injection device 302 in the second cavity space 802 can be different materials or the same material.

[0159] The first injection device 301 and the second injection device 302 are constructed in the same manner. Therefore, the structure of the first injection device 301 will be described below, while the structure of the second injection device 302 will be omitted from the description. Figure 1 and Figure 2 As shown, the first injection device 301 includes, for example, a cylinder 310, a nozzle 320, a screw 330, a metering motor 340, an injection motor 350, and a pressure detector 360. The cylinder 310 heats the molding material supplied to it. The nozzle 320 is located at the front end of the cylinder 310 and presses against the mold assembly 800. The screw 330 is configured to rotate freely and move forward and backward within the cylinder 310. The metering motor 340 rotates the screw 330. The injection motor 350 moves the screw 330 forward and backward. The pressure detector 360 detects the pressure transmitted between the injection motor 350 and the screw 330.

[0160] The cylinder body 310 heats the molding material supplied to it from the supply port 311. The molding material includes, for example, resin. The molding material is formed in granular form and supplied to the supply port 311 in a solid state. The supply port 311 is formed at the rear of the cylinder body 310. A cooler 312, such as a water-cooled cylinder, is provided on the outer periphery of the rear of the cylinder body 310. A heater 313, such as a belt heater, and a temperature detector 314 are provided on the outer periphery of the cylinder body 310, further forward than the cooler 312.

[0161] The cylinder block 310 is divided into multiple regions along its axial direction (e.g., the X-axis direction). A heater 313 and a temperature detector 314 are respectively installed in each of the multiple regions. A set temperature is set for each of the multiple regions, and the control device 700 controls the heater 313 so that the temperature detected by the temperature detector 314 becomes the set temperature.

[0162] A nozzle 320 is located at the front end of the cylinder 310 and presses 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.

[0163] The screw 330 is configured to rotate freely and move forward and backward within the cylinder 310. When the screw 330 is rotated, the molding material is conveyed forward along the spiral grooves of the screw 330. As the molding material is conveyed forward, it is gradually melted by heat from the cylinder 310. As the molten molding material is conveyed forward of the screw 330 and accumulates at the front of the cylinder 310, the screw 330 retracts. Then, when the screw 330 is moved forward, the molten molding material accumulated at the front of the screw 330 is injected from the nozzle 320 and fills the mold assembly 800.

[0164] A check ring 331 is installed at the front of the screw 330, which acts as a check valve to prevent the molding material from flowing backward from the front of the screw 330 when the screw 330 is pressed forward.

[0165] When the screw 330 is advanced, the check ring 331 is pressed backward by the pressure of the molding material in front of the screw 330, and retracts relative to the screw 330 to a closed position that blocks the flow path of the molding material (see reference). Figure 2 This prevents the molding material accumulated in front of the screw 330 from flowing backward.

[0166] On the other hand, when the screw 330 is rotated, the check ring 331 is pressed forward by the pressure of the molding material being conveyed forward along the spiral groove of the screw 330, and advances relative to the screw 330 to the open position where the flow path of the molding material is opened (see reference). Figure 1 Thus, the molding material is conveyed to the front of the screw 330.

[0167] The check ring 331 can be either a cotransformer that rotates with the screw 330 or a non-cotransformer that does not rotate with the screw 330.

[0168] Additionally, the first injection device 301 may have a drive source that moves the check ring 331 back and forth relative to the screw 330 between an open position and a closed position.

[0169] The metering motor 340 rotates the screw 330. The drive source for rotating the screw 330 is not limited to the metering motor 340; for example, it could be a hydraulic pump.

[0170] The injection motor 350 moves the screw 330 forward and backward. A motion conversion mechanism is provided between the injection motor 350 and the screw 330 to convert the rotational motion of the injection motor 350 into the linear motion of the screw 330. This motion conversion mechanism may include, for example, a lead screw shaft and a lead screw nut screwed to the lead screw shaft. Ball bearings, rollers, etc., may be provided between the lead screw shaft and the lead screw nut. The drive source for moving the screw 330 forward and backward is not limited to the injection motor 350; for example, it may be a hydraulic cylinder.

[0171] Pressure detector 360 detects the pressure transmitted between injection motor 350 and screw 330. Pressure detector 360 is located in the pressure transmission path between injection motor 350 and screw 330, and detects the pressure acting on pressure detector 360.

[0172] The pressure detector 360 sends a signal indicating its detection result to the control device 700. The detection result of the pressure detector 360 is used for the control and monitoring of the pressure exerted on the screw 330 from the molding material, the back pressure relative to the screw 330, and the pressure exerted on the molding material from the screw 330.

[0173] The first injection unit 301 performs metering, filling, and pressure holding processes under the control of the control device 700. The filling and pressure holding processes can be collectively referred to as the injection process.

[0174] In the metering process, the metering motor 340 is driven to rotate the screw 330 at a set speed, and the molding material is conveyed forward along the spiral groove of the screw 330. Simultaneously, the molding material is gradually melted. As the molten molding material is conveyed forward of the screw 330 and accumulates at the front of the cylinder 310, the screw 330 retracts. The rotational speed of the screw 330 is detected, for example, using a metering motor encoder 341. The metering motor encoder 341 detects the rotation of the metering motor 340 and sends a signal indicating its detection result to the control device 700. Alternatively, the screw speed detector for detecting the rotational speed of the screw 330 is not limited to the metering motor encoder 341; conventional detectors can be used.

[0175] In the metering process, to prevent the screw 330 from retracting too rapidly, the injection motor 350 can be driven to apply a set back pressure to the screw 330. The back pressure on the screw 330 is detected, for example, using a pressure detector 360. The pressure detector 360 sends a signal indicating its detection result to the control device 700. The metering process ends when the screw 330 retracts to the metering end position and a predetermined amount of molding material accumulates in front of the screw 330.

[0176] The position and speed of the screw 330 in the metering process are uniformly set as a series of preset conditions. For example, the metering start position, speed switching position, and metering end position are set. These positions are arranged sequentially from front to back and represent the start and end points of the set speed interval. The speed is set for each interval. There can be one or more speed switching positions, or no speed switching position can be set. Furthermore, the back pressure is set for each interval.

[0177] In the filling process, the injection motor 350 is driven to advance the screw 330 at a set speed, filling the first cavity space 801 within the mold assembly 800 with the liquid molding material accumulated in front of the screw 330. The position and speed of the screw 330 are detected, for example, using an injection motor encoder 351. The injection motor encoder 351 detects the rotation of the injection motor 350 and sends a signal indicating its detection result to the control device 700. If the screw 330 reaches a set position, a switch is made from the filling process to the holding pressure process (so-called V / P switching). The position where the V / P switching occurs is also called the V / P switching position. The set speed of the screw 330 can be changed according to the position of the screw 330, time, etc.

[0178] In the filling process, the position and moving speed of the screw 330 are uniformly set as a series of preset conditions. For example, the filling start position (also called the "injection start position"), the moving speed switching position, and the V / P switching position are set. These positions are arranged sequentially from back to front and represent the start and end points of the set moving speed interval. The moving speed is set for each interval. There can be one or more moving speed switching positions. Alternatively, no moving speed switching position may be set.

[0179] The upper limit of the pressure of the screw 330 is set for each range of the screw 330's travel speed. The pressure of the screw 330 is detected by a pressure detector 360. When the detected value of the pressure detector 360 is below the set pressure, the screw 330 advances at the set travel speed. On the other hand, when the detected value of the pressure detector 360 exceeds the set pressure, in order to protect the mold, the screw 330 advances at a slower travel speed than the set travel speed, so that the detected value of the pressure detector 360 falls below the set pressure.

[0180] Furthermore, during the filling process, after the screw 330 reaches the V / P switching position, it can be paused at the V / P switching position before the V / P switch is performed. Alternatively, the screw 330 can be moved forward or backward at a slight speed instead of stopping before the V / P switch is about to occur. Moreover, the screw position detector for detecting the position of the screw 330 and the screw speed detector for detecting the movement speed of the screw 330 are not limited to the injection motor encoder 351; conventional detectors can be used.

[0181] In the holding pressure process, the injection motor 350 is driven to push the screw 330 forward, maintaining the pressure of the molding material at the front end of the screw 330 (hereinafter also referred to as "holding pressure") at a set pressure, and pushing the remaining molding material in the cylinder 310 towards the mold assembly 800. This replenishes the amount of molding material in the mold assembly 800 that is insufficient due to cooling shrinkage. The holding pressure is detected, for example, using a pressure detector 360. The pressure detector 360 sends a signal indicating its detection result to the control device 700. The set value of the holding pressure can be changed according to the elapsed time since the start of the holding pressure process. The holding pressure and the holding time of the holding pressure can be set separately for multiple holding pressure processes, or they can be set uniformly as a series of setting conditions.

[0182] During the holding pressure process, the molding material in the first cavity space 801 within the mold assembly 800 is gradually cooled. At the end of the holding pressure process, the inlet of the first cavity space 801 is blocked by the solidified molding material. This state is called gate sealing, which prevents the backflow of molding material from the first cavity space 801. After the holding pressure process, a cooling process begins. During the cooling process, the molding material within the first cavity space 801 solidifies. To shorten the molding cycle time, a metering process can be performed during the cooling process.

[0183] Furthermore, while the first injection device 301 in this embodiment is a coaxial screw type, it could also be a pre-plasticizing type, etc. In a pre-plasticizing type injection device, molten molding material in a plasticizing cylinder is supplied to the injection cylinder, and the molding material is injected from the injection cylinder into the mold assembly. In the plasticizing cylinder, the screw is configured to rotate freely but not retract, or the screw is configured to rotate freely and retract freely. On the other hand, in the injection cylinder, the plunger is configured to retract freely.

[0184] Furthermore, in this embodiment, the first injection device 301 is horizontal with the cylinder 310's axial direction in the horizontal direction, but it can also be vertical with the cylinder 310's axial direction in the vertical direction. The mold clamping device combined with the vertical first injection device 301 can be either vertical or horizontal. Similarly, the mold clamping device combined with the horizontal first injection device 301 can be either horizontal or vertical.

[0185] (The first mobile device and the second mobile device) In the description of the first moving device 401 and the second moving device (not shown), similar to the description of the first injection device 301 and the second injection device 302, the direction of movement of the screw 330 during filling (e.g., the negative X-axis direction) is set to forward, and the direction of movement of the screw 330 during metering (e.g., the positive X-axis direction) is set to rearward.

[0186] The first moving device 401 moves the first injection device 301 forward and backward relative to the mold device 800. Furthermore, the first moving device 401 presses the nozzle 320 of the first injection device 301 relative to the mold device 800 to generate nozzle contact pressure.

[0187] The second moving device moves the second injection device 302 forward and backward relative to the mold device 800. Furthermore, the second moving device presses the nozzle of the second injection device 302 relative to the mold device 800 to generate nozzle contact pressure.

[0188] The first moving device 401 and the second moving device are arranged at intervals along the Y-axis. The first moving device 401 and the second moving device enable the first injection device 301 and the second injection device 302 to move forward and backward independently.

[0189] The first moving device 401 and the second moving device are constructed in the same manner. Therefore, the structure of the first moving device 401 will be described below, while the structure of the second moving device will be omitted from the description. Figure 1 and Figure 2 As shown, the first moving device 401 includes a hydraulic pump 410, a motor 420 as a drive source, and a hydraulic cylinder 430 as a hydraulic actuator.

[0190] The hydraulic pump 410 has a first port 411 and a second port 412. The hydraulic pump 410 is a bidirectional rotating pump, generating hydraulic pressure by switching the rotation direction of the motor 420, drawing in working fluid (e.g., oil) from either the first port 411 or the second port 412 and discharging it from the other port. Alternatively, the hydraulic pump 410 can also draw working fluid from a tank and discharge working fluid from either the first port 411 or the second port 412.

[0191] Motor 420 operates hydraulic pump 410. Motor 420 drives hydraulic pump 410 by means of rotational direction and rotational torque corresponding to control signals from control device 700. Motor 420 can be an electric motor or an electric servo motor.

[0192] 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 interior of the cylinder body 431 into a front chamber 435, which serves as a first chamber, and a rear chamber 436, which serves as a second chamber. The piston rod 433 is fixed to a fixed pressure plate 110.

[0193] The front chamber 435 of the hydraulic cylinder 430 is connected to the first port 411 of the hydraulic pump 410 via a first flow path 413. Working fluid discharged from the first port 411 is supplied to the front chamber 435 via the first flow path 413, thereby pressing the first injection device 301 forward. As the first injection device 301 advances, its nozzle 320 presses against the fixed mold 810. The front chamber 435 functions as a pressure chamber that generates the nozzle contact pressure of the nozzle 320 due to the pressure of the working fluid supplied from the hydraulic pump 410.

[0194] 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 working fluid ejected from the second port 412 is supplied to the rear chamber 436 of the hydraulic cylinder 430 via the second flow path 414, thereby pressing the first injection device 301 backward. The first injection device 301 retracts and the nozzle 320 of the first injection device 301 separates from the fixed mold 810.

[0195] In addition, in this embodiment, the first moving device 401 includes a hydraulic cylinder 430, but the present invention is not limited thereto. For example, an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the first injection device 301 may be used instead of the hydraulic cylinder 430.

[0196] (Control device) The control device 700 is, for example, composed of a computer, such as Figures 1-2 As shown, the device includes a CPU (Central Processing Unit) 701, a storage medium 702 such as a memory, an input interface 703, and an output interface 704. The control device 700 causes the CPU 701 to execute a program stored in the storage medium 702, thereby performing various controls. Furthermore, the control device 700 receives signals from the outside through the input interface 703 and sends signals to the outside through the output interface 704.

[0197] The control device 700 repeatedly manufactures the first molded product 21 and the second molded product 22 by repeatedly performing metering, mold closing, pressurizing, mold closing, filling, pressure holding, cooling, depressurizing, mold opening, ejection, and mold rotation processes. The series of actions used to obtain the first molded product 21 and the second molded product 22, such as the action from the start of the metering process to the start of the next metering process, is also referred to as "material injection" or "molding cycle." Furthermore, the time required for one material injection is also referred to as "molding cycle time" or "cycle time."

[0198] A typical molding cycle may include, for example, the following steps in sequence: metering, mold closing, pressure increase, mold closing, filling, pressure holding, cooling, pressure release, mold opening, ejection, and mold rotation. This sequence refers to the order in which each step begins. The filling, pressure holding, and cooling steps occur during the mold closing step. Alternatively, the start of the mold closing step can coincide with the start of the filling step. The end of the pressure release step can coincide with the start of the mold opening step.

[0199] Furthermore, to shorten the molding cycle time, multiple processes can be performed simultaneously. For example, the metering process can be performed during the cooling process of the previous molding cycle, or during the mold closing process. In this case, the mold closing process can also be set to be performed at the beginning of the molding cycle. Furthermore, the filling process can begin during the mold closing process. Furthermore, the ejection process can begin during the mold opening process. When an on / off valve is provided for the flow path of the nozzle 320, the mold opening process can begin during the metering process. Because even if the mold opening process begins during the metering process, as long as the on / off valve closes the flow path of the nozzle 320, the molding material will not leak from the nozzle 320.

[0200] In addition, a single molding cycle can also include processes other than metering, mold closing, pressurization, mold closing, filling, pressure holding, cooling, depressurization, mold opening, ejection, and mold rotation.

[0201] During a molding cycle, the temperature regulating medium flows in the temperature regulating circuit 611. The control device 700 infers the temperature of the sliding plate 610 based on the signal sent from the temperature sensor 612 and monitors whether the temperature is within a preset specified temperature range. The specified temperature range is, for example, the temperature range within which the lubricating oil supplied between the front end face of the sliding plate 610 and the rear end face of the disc portion 523 exhibits the desired lubricating performance. Furthermore, when the inferred temperature of the sliding plate 610 is lower than the specified temperature range, the control device 700 temporarily stops the flow of the temperature regulating medium or reduces the flow rate; when the temperature is higher than the specified temperature range, it temporarily stops the molding cycle or increases the flow rate of the temperature regulating medium.

[0202] Furthermore, during a molding cycle, the temperature adjustment medium flows in the temperature adjustment circuit 621. The control device 700 infers the temperature of the sliding plate 620 based on the signal sent from the temperature sensor 622 and monitors whether the temperature is within a preset specified temperature range. The specified temperature range is, for example, the temperature range within which the lubricating oil supplied between the front end face of the sliding plate 620 and the rear end face of the driven gear 535 achieves the desired lubrication performance. Moreover, when the inferred temperature of the sliding plate 620 is lower than the specified temperature range, the control device 700 temporarily stops the flow of the temperature adjustment medium or reduces the flow rate; when the temperature is higher than the specified temperature range, it temporarily stops the molding cycle or increases the flow rate of the temperature adjustment medium.

[0203] During the mold rotation process, the front end face of the sliding plate 610 slides against the rear end face of the disk portion 523 as the turntable 520 rotates. This generates heat due to friction between the sliding plate 610 and the disk portion 523. In the first embodiment, even with this frictional heat, as described above, the control device 700 controls the flow of the temperature regulating medium in the temperature regulating circuit 611, thereby limiting the temperature of the sliding plate 610 within a specified temperature range.

[0204] Similarly, as the turntable 520 rotates, the rear end face of the sliding plate 620 slides against the front end face of the driven gear 535, generating heat due to friction between the sliding plate 620 and the driven gear 535. In the first embodiment, even if this frictional heat is generated, as described above, the control device 700 controls the flow of the temperature regulating medium in the temperature regulating circuit 621, thereby limiting the temperature of the sliding plate 620 within a specified temperature range.

[0205] For example, a pre-metering suction process can be performed after the pressure holding process and before the metering process begins, to retract the screw 330 to a pre-set metering start position. This reduces the pressure of the molding material accumulated in front of the screw 330 before the metering process begins, preventing the screw 330 from retracting abruptly when the metering process begins.

[0206] Furthermore, a post-metering back suction process can be performed after the metering process ends and before the filling process begins, retracting the screw 330 to a pre-set filling start position (also known as the "injection start position"). This reduces the pressure of the molding material accumulated in front of the screw 330 before the filling process begins, preventing leakage of the molding material from the nozzle 320 before the filling process begins.

[0207] The control device 700 is connected to an operation device 750 that receives user input and a display device 760 that displays a screen. The operation device 750 and the display device 760 can be integrated, for example, using a touch panel. The touch panel, as the display device 760, displays a screen under the control of the control device 700. Information such as the settings of the injection molding machine 10 and the current status of the injection molding machine 10 can be displayed on the touch panel's screen. Furthermore, input operation units such as buttons and input fields for receiving user input can be displayed on the touch panel's screen. The touch panel, as the operation device 750, detects user input on the screen and outputs a signal corresponding to the input operation to the control device 700. Thus, for example, the user can simultaneously check the information displayed on the screen and operate the input operation units on the screen to set the injection molding machine 10 (including inputting setting values). Furthermore, by operating the input operation units on the screen, the user can activate the injection molding machine 10 corresponding to the input operation units. In addition, the operation of the injection molding machine 10 may include, for example, the operation (including stopping) of the mold 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 (not shown), and the switching of the display screen displayed on the touch panel of the display device 760.

[0208] Furthermore, while the operation device 750 and display device 760 of this embodiment are integrated as a single touch panel, they can also be installed independently. Additionally, multiple operation devices 750 can be installed. The operation device 750 and display device 760 are located on the operation side (negative Y-axis direction) of the mold clamping device 100 (more specifically, the fixed pressure plate 110).

[0209] According to the first embodiment, during the mold rotation process, frictional heat is generated between the sliding plate 610 and the disc portion 523, and between the sliding plate 620 and the driven gear 535, but the temperature of the sliding plates 610 and 620 can be maintained within a specified temperature range. Therefore, the lubricating performance of the lubricating oil can be maintained for a long time. Furthermore, stable sliding properties can be obtained, and wear on the sliding plates 610 and 620 can be suppressed. Moreover, thermal expansion of the movable pressure plate 120 and the turntable 520 can also be suppressed. In this respect, stable sliding properties can also be obtained, and wear on the sliding plates 610 and 620 can be suppressed.

[0210] In the first embodiment, the turntable 520 is an example of a first component, the movable pressure plate 120 is an example of a second component, the sliding plates 610 and 620 are examples of sacrificial components, and the temperature adjustment circuits 611 and 621 are examples of temperature adjustment mechanisms.

[0211] When the thickness of the sliding plate 610 or 620 becomes less than the specified thickness due to wear, the sliding plate 610 or 620 can also be replaced.

[0212] In the first embodiment, the rear end face of the cylindrical portion 524 of the turntable 520 is far from the front end face of the movable pressure plate 120, but a sliding plate 620 may also be provided between the rear end face of the cylindrical portion 524 and the front end face of the movable pressure plate 120. However, from the viewpoint of preventing the turntable 520 from tipping over, the sliding plate 620 is preferably provided between the driven gear 535 and the gear limiting block 125.

[0213] Next, a first variation of the first embodiment will be described. The first variation of the first embodiment differs from the first embodiment mainly in that the sliding plate is fixed to the turntable. Figure 11 This is a diagram showing the sliding plate 610 fixed to the turntable according to the first modification of the first embodiment.

[0214] In the first variation of the first embodiment, as Figure 11 As shown, the sliding plate 610 is detachably fixed to the rear end face of the disc portion 523 of the turntable 520, rather than the front end face of the front surface plate 121 of the movable pressure plate 120. The sliding plate 610 is detachably fixed to the rear end face of the disc portion 523, for example, using bolts 613. Multiple sliding plates 610 can also be used (e.g., two). The material of the sliding plate 610 is a softer material than the front surface plate 121 of the movable pressure plate 120, such as copper or a copper alloy like brass. Similar to the first embodiment, the temperature adjustment circuit 611 and the temperature sensor 612 are provided on the front surface plate 121 and the rear block 126 (see reference). Figure 7 ).

[0215] In the mold rotation process of the first variation of the first embodiment, the rear end face of the sliding plate 610 slides against the front end face of the front surface plate 121 as the turntable 520 rotates. Therefore, heat is generated due to friction between the sliding plate 610 and the front surface plate 121. In the first variation of the first embodiment, even when this frictional heat is generated, the control device 700 controls the flow of the temperature regulating medium in the temperature regulating circuit 611, thereby limiting the temperature of the sliding plate 610 within a specified temperature range.

[0216] According to the first variation of the first embodiment, during the mold rotation process, frictional heat is generated between the sliding plate 610 and the front surface plate 121, but the temperature of the sliding plate 610 can be maintained within a specified temperature range. Therefore, the lubricating performance of the lubricating oil can be maintained for a long time. Furthermore, stable sliding properties can be obtained, and wear of the sliding plate 610 can be suppressed. Moreover, thermal expansion of the movable pressure plate 120 and the turntable 520 can also be suppressed. In this respect, stable sliding properties can also be obtained, and wear of the sliding plate 610 can be suppressed.

[0217] Next, a second variation of the first embodiment will be described. The second variation of the first embodiment differs from the first variation of the first embodiment mainly in the structure of the temperature adjustment circuit. Figure 12 This is a vertical sectional view showing the temperature adjustment circuit involved in the second variation of the first embodiment, and it is a vertical sectional view cut along the rotation center line of the turntable.

[0218] In the second variation of the first embodiment, similar to the first variation of the first embodiment, the sliding plate 610 is detachably fixed to the rear end face of the disc portion 523 of the turntable 520 (see reference). Figure 11 ). And, as Figure 12 As shown, temperature adjustment circuits 611 are not formed in the front surface plate 121 and the rear block 126, but temperature adjustment circuits 614 are formed in the disc portion 523 and the cylindrical portion 524 of the turntable 520. Similar to temperature adjustment circuit 611, for example, when viewed in the mold opening / closing direction, temperature adjustment circuit 614 has one end and another end near the lower end of the sliding plate 610. Furthermore, temperature adjustment circuit 614 extends upward from one end and the other end, and the portion extending upward from one end and the portion extending upward from the other end are connected to each other near the upper end of the sliding plate 610. Temperature adjustment circuit 614 may also have one end near the lower end of the sliding plate 610 and another end near the upper end of the sliding plate 610, and these ends meander between them. When viewed in the mold opening / closing direction, temperature adjustment circuit 614 may also be located near the center of the sliding plate 610. Temperature adjustment circuit 614 may also be connected to a portion of the linear body 580. Other structures are the same as in the first variation of the first embodiment.

[0219] According to the second variation of the first embodiment, the same effect as the first variation can also be obtained.

[0220] Next, the second embodiment will be described. The second embodiment differs from the first embodiment mainly in the structure of the temperature adjustment circuit. Figure 13 This is a vertical sectional view showing the temperature adjustment circuit involved in the second embodiment, which is a vertical sectional view cut along the rotation center line of the turntable.

[0221] In the second embodiment, such as Figure 13 As shown, the temperature adjustment circuit 611 is formed not only in the front surface plate 121 and the rear block 126, but also extends into the interior of the sliding plate 610. A sealing component, such as an O-ring, surrounding the temperature adjustment circuit 611 is preferably provided between the front surface plate 121 and the sliding plate 610. Other structures are the same as in the first embodiment.

[0222] According to the second embodiment, the temperature of the sliding plate 610 can be directly adjusted. Therefore, superior temperature adjustment efficiency can be obtained.

[0223] Next, a variation of the second embodiment will be described. The main difference between the variation of the second embodiment and the second embodiment is that the sliding plate is fixed to the turntable. Figure 14 This is a vertical sectional view showing the temperature adjustment circuit involved in the modified example of the second embodiment, and it is a vertical sectional view cut along the rotation center line of the turntable.

[0224] In a variation of the second embodiment, similar to the first variation of the first embodiment, the sliding plate 610 is detachably fixed to the rear end face of the disc portion 523 of the turntable 520 (see reference). Figure 11 ). And, as Figure 14 As shown, temperature adjustment circuits 611 are not formed in the front surface plate 121 and the rear block 126, but temperature adjustment circuits 614 are formed in the disc portion 523 and the cylindrical portion 524 of the turntable 520. The temperature adjustment circuit 614 is formed not only in the winding portion 522 but also extends into the interior of the sliding plate 610. A sealing component such as an O-ring surrounding the temperature adjustment circuit 614 is preferably provided between the disc portion 523 and the sliding plate 610. Other structures are the same as in the second embodiment.

[0225] According to the modified example of the second embodiment, the same effect as the second modified example can also be obtained.

[0226] Next, the third embodiment will be described. The third embodiment relates to the slider of the slide of the pressure plate carriage that supports the movable pressure plate. Figure 15 This is a vertical sectional view showing the slider of the pressure plate carriage according to the third embodiment.

[0227] In the third embodiment, as Figure 15 As shown, on the mold clamping device frame 910, the rear block 126 of the movable pressure plate 120 is supported by a pressure plate carriage 190. The pressure plate carriage 190 has an upper surface 191 parallel to the horizontal direction that supports the rear block 126 and a lower surface 192 opposite to the mold clamping device frame 910. The lower surface 192 is located at the center in the X-axis direction and has a central portion 193 parallel to the horizontal direction, a front inclined portion 194 located further in the positive X-axis direction than the central portion 193, and a rear inclined portion 195 located further in the negative X-axis direction than the central portion 193. The front inclined portion 194 is an inclined surface that is further away from the mold clamping device frame 910 the further away from the central portion 193. The rear inclined portion 195 is an inclined surface that is further away from the mold clamping device frame 910 the further away from the central portion 193. For example, the central part 193, the front inclined part 194, and the rear inclined part 195 are all flat surfaces.

[0228] A wedge-shaped slider 630 is provided between the front inclined portion 194 and the mold clamping device frame 910. The slider 630 has an inclined surface 631 that contacts the front inclined portion 194, a lower surface 632 that contacts the mold clamping device frame 910, and a vertical surface 633 that connects the inclined surface 631 and the lower surface 632. The cross-section of the slider 630 perpendicular to the Z-axis is approximately a right-angled triangle. The slider 630 has a protrusion 634 that rises upward from the intersection of the inclined surface 631 and the vertical surface 633. A bolt 635 is provided, one end of which is fixed to the front end face of the pressure plate carriage 190 and passes through the protrusion 634 along the X-axis. An adjusting nut 636 is installed at the other end of the bolt 635. By tightening the adjusting nut 636, the slider 630 can be fixed to the pressure plate carriage 190 with the inclined surface 631 in contact with the front inclined portion 194 and the lower surface 632 in contact with the mold clamping device frame 910.

[0229] During the mold opening and closing processes, the lower surface 632 of the slider 630 slides against the upper surface of the mold closing device frame 910. Therefore, lubricating oil can also be supplied between the lower surface 632 of the slider 630 and the upper surface of the mold closing device frame 910.

[0230] A wedge-shaped slider 640 is provided between the rear inclined portion 195 and the mold clamping device frame 910. The slider 640 has an inclined surface 641 that contacts the rear inclined portion 195, a lower surface 642 that contacts the mold clamping device frame 910, and a vertical surface 643 that connects the inclined surface 641 and the lower surface 642. The cross-section of the slider 640 perpendicular to the Z-axis is approximately a right-angled triangle. The slider 640 has a protrusion 644 that rises upward from the intersection of the inclined surface 641 and the vertical surface 643. A bolt 645 is provided, one end of which is fixed to the rear end face of the pressure plate carriage 190 and passes through the protrusion 644 along the X-axis. An adjusting nut 646 is installed at the other end of the bolt 645. By tightening the adjusting nut 646, the slider 640 can be fixed to the pressure plate carriage 190 with the inclined surface 641 in contact with the rear inclined portion 195 and the lower surface 642 in contact with the mold clamping device frame 910.

[0231] During the mold opening and closing processes, the lower surface 642 of the slider 640 slides against the upper surface of the mold closing device frame 910. Therefore, lubricating oil can also be supplied between the lower surface 642 of the slider 640 and the upper surface of the mold closing device frame 910.

[0232] A temperature regulating circuit 196 is formed in the pressure plate carriage 190 to regulate the flow of a temperature regulating medium that adjusts the temperature of sliders 630 and 640. Water is used as the temperature regulating medium. The temperature regulating medium is supplied from the supply port of the temperature regulating circuit 196 into the temperature regulating circuit 196, exchanges heat with the pressure plate carriage 190, sliders 630 and 640, and is discharged from the outlet of the temperature regulating circuit 196. Furthermore, a temperature sensor 197 is provided inside the pressure plate carriage 190. The temperature sensor 197 sends a signal indicating its detection result to the control device 700. The control device 700 can infer the temperature of sliders 630 and 640 based on the signal sent from the temperature sensor 197.

[0233] During the mold opening and closing processes, the lower surface 632 of the slider 630 slides against the upper surface of the mold clamping device frame 910, and the lower surface 642 of the slider 640 slides against the upper surface of the mold clamping device frame 910, as the movable pressure plate 120 moves. This generates heat due to friction between the slider 630 and the mold clamping device frame 910, and also due to friction between the slider 640 and the mold clamping device frame 910. During this period, a temperature regulating medium flows in the temperature regulating circuit 196, and the temperature sensor 197 sends a signal indicating its detection result to the control device 700. The control device 700 infers the temperature of the sliders 630 and 640 based on the signal sent from the temperature sensor 197 and monitors whether the temperature is within a preset temperature range. The preset temperature range is, for example, the temperature range within which the lubricating oil supplied to the lower surface 632 of the slider 630 and between the lower surface 642 of the slider 640 and the upper surface of the mold clamping device frame 910 exhibits the desired lubricating performance. Furthermore, when the inferred temperature of slider 630 or 640 is lower than the specified temperature range, the control device 700 temporarily stops the flow of the temperature adjustment medium or reduces the flow rate. When the temperature is higher than the specified temperature range, the molding cycle is temporarily stopped or the flow rate of the temperature adjustment medium is increased.

[0234] According to the third embodiment, during the mold opening and closing processes, frictional heat is generated between the sliders 630 and 640 and the mold clamping device frame 910, but the temperature of the sliders 630 and 640 can be maintained within a specified temperature range. Therefore, the lubricating performance of the lubricating oil can be maintained for a long time. Furthermore, stable sliding properties are achieved, and wear on the sliders 630 and 640 is suppressed. Moreover, thermal expansion of the pressure plate carriage 190 and the mold clamping device frame 910 is also suppressed. In this respect, stable sliding properties are also achieved, and wear on the sliders 630 and 640 is suppressed.

[0235] In the third embodiment, the mold clamping device frame 910 is an example of the first component, the pressure plate slide 190 is an example of the second component, the sliders 630 and 640 are examples of sacrificial components, and the temperature adjustment circuit 196 is an example of the temperature adjustment mechanism.

[0236] Even if the thickness of slider 630 or 640 decreases due to wear, the distance between the lower surface 192 of plate carriage 190 and mold clamping device frame 910 can be maintained by tightening adjusting nut 636 or 646. Furthermore, slider 630 or 640 can be replaced when the thickness of slider 630 or 640 becomes less than the specified thickness due to wear.

[0237] Next, the fourth embodiment will be described. The fourth embodiment differs from the third embodiment mainly in the structure of the temperature adjustment circuit. Figure 16This is a vertical sectional view showing the slider of the pressure plate carriage according to the fourth embodiment.

[0238] In the fourth embodiment, such as Figure 16 As shown, a temperature regulating circuit 637 for adjusting the flow of a temperature regulating medium is provided in the slider 630 to regulate the temperature of the slider 630. Water is used as an example of the temperature regulating medium. The temperature regulating medium is supplied into the temperature regulating circuit 637 from its supply port, exchanges heat with the slider 630, and is discharged from the outlet of the temperature regulating circuit 637. Similarly, a temperature regulating circuit 647 for adjusting the flow of a temperature regulating medium is formed in the slider 640 to regulate the temperature of the slider 640. Water is used as an example of the temperature regulating medium. The temperature regulating medium is supplied into the temperature regulating circuit 647 from its supply port, exchanges heat with the slider 640, and is discharged from the outlet of the temperature regulating circuit 647. On the other hand, a temperature regulating circuit 196 is not formed in the pressure plate carriage 190. Other structures are the same as in the third embodiment.

[0239] According to the fourth embodiment, the temperature of sliders 630 and 640 can be adjusted with higher precision.

[0240] In the fourth embodiment, temperature adjustment circuits 637 and 647 are examples of temperature adjustment mechanisms.

[0241] In the third and fourth embodiments, the injection molding machine 10 may include one injection device, or it may not have a turntable but instead have a moving mold installed on a movable pressure plate.

[0242] The third and fourth embodiments can also be combined. That is, it can also be as follows: as in the third embodiment, a temperature adjustment circuit 196 is formed in the slide 190 for the pressure plate, and as in the fourth embodiment, temperature adjustment circuits 637 and 647 are formed in the sliders 630 and 640 respectively.

[0243] (Variations, etc.) The above describes the implementation methods of the injection molding machine, but the present invention is not limited to the above-described embodiments. Various changes, modifications, substitutions, additions, deletions, and combinations can be made within the scope described in the technical solution. These, of course, also fall within the technical scope of the present invention.

[0244] For example, the guide groove forming portion 560 in the above embodiment is disposed below the turntable 520, but it may also be disposed above the turntable 520. This configuration, for example, is to make... Figure 9 and Figure 10 The flexible retainer 500, turntable 520 and guide 550 are arranged to rotate 180° around the rotation center line 520X of the turntable 520.

[0245] Furthermore, while the turntable 520 in the above embodiment is wound with one flexible retainer 500, multiple flexible retainers 500 may also be wound. For example, when viewed in the mold opening and closing direction, two flexible retainers 500 may be symmetrically arranged with the rotation center line 520X of the turntable 520 as the center point. In this case, the two flexible retainers 500 are supported by different guides 550, one guide 550 being disposed below the turntable 520 and the other guide 550 being disposed above the turntable 520.

[0246] Furthermore, the mold closing device 100 in the above embodiment is a horizontal type with the mold opening and closing direction in the horizontal direction, but it can also be a vertical type with the mold opening and closing direction in the vertical direction. When the mold closing device 100 is vertical, the lower mold is mounted on the turntable 520, and the turntable 520 is rotatably mounted on the lower pressure plate. The rotation center line 520X of the turntable 520 is parallel to the vertical direction. The guide member 550 is fixed to the lower pressure plate. The upper mold is mounted on the upper pressure plate disposed above the lower pressure plate. The upper mold is a moving mold, and the lower mold is a fixed mold.

Claims

1. An injection molding machine, characterized in that, have: Turntable; The movable pressure plate is configured to move freely along the mold opening and closing direction, and has a surface opposite to the turntable, and supports the turntable and the moving mold. A sliding plate is disposed between the turntable and the movable pressure plate, fixed to the turntable, and has a sliding surface that slides with the movable pressure plate; as well as The temperature adjustment mechanism adjusts the temperature of the sliding plate. The turntable is rotatably mounted on the movable pressure plate via the sliding plate. The rotation center line of the turntable is parallel to the mold opening and closing direction. The sliding plate is configured to withstand the frictional heat generated by the sliding between the turntable and the movable pressure plate, as well as the heat transferred from the moving mold to the sliding plate. The temperature adjustment mechanism, in order to remove the frictional heat and the transferred heat, includes a temperature adjustment circuit formed in the sliding plate. The temperature adjustment circuit is configured to adjust the temperature of the sliding plate by folding back along the sliding surface or bending along the rotation direction. The turntable has a linear body along its outer periphery through which a temperature-regulating medium flows. The linear body is connected to the temperature adjustment circuit, and the temperature adjustment medium flowing through the linear body is supplied to the temperature adjustment circuit.

2. An injection molding machine, characterized in that, When the movable pressure platen moves forward during mold closing and moves backward during mold opening, the injection molding machine comprises: Turntable; The movable pressure plate is configured to move freely along the mold opening and closing direction and has a front end face facing the rear end face of the turntable. A sliding plate is disposed between the rear end face of the turntable and the front end face of the movable pressure plate, fixed to either the turntable or the movable pressure plate, and has a sliding surface that slides with the other of the turntable or the movable pressure plate and is replaceable. as well as The temperature adjustment mechanism adjusts the temperature of the sliding plate. The turntable is rotatably mounted on the movable pressure plate via the sliding plate in such a manner that the rear end face of the turntable does not contact the front end face of the movable pressure plate. The rotation center line of the turntable is parallel to the mold opening and closing direction. The sliding plate is configured to withstand the frictional heat generated by the sliding between the turntable and the movable pressure plate. To remove the frictional heat, the temperature adjustment mechanism includes a temperature adjustment circuit formed in the sliding plate. The temperature adjustment circuit is configured to adjust the temperature of the sliding plate by folding back along the sliding surface or bending along the rotation direction.

3. The injection molding machine according to claim 1 or 2, characterized in that, The sliding plate is fixed to the turntable. After the mold opening process is completed, the mold rotation process is performed. During the mold rotation process, the sliding plate rotates together with the turntable as the turntable rotates.

4. The injection molding machine according to claim 3, characterized in that, During the mold rotation process, as the turntable rotates, the sliding plate and the movable pressure plate slide against each other.

5. The injection molding machine according to claim 3, characterized in that, The sliding plate is detachably fixed to the turntable.

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