Control Device and Control Method of Injection Molding Machine

Abstract

The present invention provides a control device and a control method for an injection molding machine that performs a blanking process with good reliability. The control device (102) of the injection molding machine (10) includes: a mold opening / closing unit (114) that moves the fixed mold (62) and the movable mold (64) of the mold (16) of the injection molding machine (10) integrally in the opening direction from the state where the mold (16) is closed, thereby creating a gap (80) between the fixed mold (62) and the mounting plate (36); an insertion member control unit (116) that inserts an insertion member (92) into the gap (80); a determination unit (120) that determines whether the insertion member (92) is inserted into the gap (80); and a pushing control unit (122) that pushes out a blanking pin when it is determined that the insertion member (92) is inserted into the gap (80).

Description

Technical Field

[0001] The present invention relates to a control device and a control method for an injection molding machine. Background Art

[0002] In the field of injection molding machines, the following technique is known: by inserting a pin into a cavity of a closed mold, a hole is formed in a resin (formed product) filled in the cavity. For example, an example is disclosed in Japanese Patent Laid-Open No. 03-284920. Summary of the Invention

[0003] Hereinafter, the process of forming a hole by inserting a pin into a resin in a mold is also referred to as a "blanking process". The blanking process is performed by pushing the pin from the movable mold side to the fixed mold side while maintaining the state of forming the cavity, that is, while maintaining the connection between the fixed mold and the movable mold.

[0004] Here, if the force for pushing out the pin exceeds the force for connecting the fixed mold and the movable mold, the mold will open when the pin is pushed out. As a result, a hole cannot be formed in the formed product during the blanking process.

[0005] Therefore, an object of the present invention is to provide a control device and a control method for an injection molding machine that can perform the blanking process with good reliability.

[0006] One aspect of the present invention is a control device for an injection molding machine having a mold. The mold includes a stationary mold provided with a first insert hole set, and a movable mold that forms a cavity together with the stationary mold. The mold is opened and closed by separating and contacting the stationary mold and the movable mold with each other. The injection molding machine includes: a movable platen that supports the movable mold and separates and contacts the movable mold from the stationary mold by moving in the opening and closing direction of the mold; a stationary platen that supports the stationary mold; a mold closing locator that connects the stationary mold and the movable mold when the movable platen moves in the closing direction of the mold and disconnects them when the mold is opened; a mounting plate that mounts the stationary mold on the stationary platen; a blanking pin that is pushed out in such a way as to blank a part of the resin in the cavity toward the mounting plate side through the first insert hole set in order to form a molded product having at least one of a hole and a notch; and an insertion member that is inserted between the stationary mold and the mounting plate. The control device includes: a mold opening and closing unit that moves the stationary mold and the movable mold integrally in the opening direction of the mold from the state where the mold is closed, thereby creating a gap between the stationary mold and the mounting plate; an insertion member control unit that inserts the insertion member into the gap; a determination unit that determines whether the insertion member has been inserted into the gap; and a pushing control unit that pushes out the blanking pin when it is determined that the insertion member has been inserted into the gap.

[0007] Another aspect of the present invention is a control method for an injection molding machine having a metal mold, the metal mold including a fixed metal mold provided with a first insert kit hole and a movable metal mold that forms a cavity together with the fixed metal mold, and being opened and closed by separating and contacting the fixed metal mold and the movable metal mold with each other. The injection molding machine includes: a movable platen that supports the movable metal mold and separates and contacts the movable metal mold from the fixed metal mold by moving along the opening and closing direction of the metal mold; a fixed platen that supports the fixed metal mold; a mold clamping locator that connects the fixed metal mold and the movable metal mold when the movable platen moves in the closing direction of the metal mold and releases the connection when the metal mold is opened; a mounting plate that mounts the fixed metal mold on the fixed platen; a blanking pin that is pushed out in such a manner that a part of the resin in the cavity is blanked toward the mounting plate side through the first insert kit hole in order to form a molded product having at least one of a hole and a notch; and an insertion member that is inserted between the fixed metal mold and the mounting plate. The control method includes: a gap opening step of moving the fixed metal mold and the movable metal mold integrally in the opening direction of the metal mold from the state where the metal mold is closed, thereby creating a gap between the fixed metal mold and the mounting plate; an insertion control step of inserting the insertion member into the gap; an insertion determination step of determining whether the insertion member is inserted into the gap; and a blanking step of pushing out the blanking pin when it is determined that the insertion member is inserted into the gap.

[0008] According to the present invention, there is provided a control device and a control method for an injection molding machine that can perform a blanking process with good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a structural diagram of the injection molding machine according to the embodiment.

[0010] Figure 2 is a first cross-sectional view schematically showing the structure of the metal mold and the ejection mechanism.

[0011] Figure 3 is a cross-sectional view for explaining the insert kit provided in the fixed metal mold and the structure of the fixed metal mold related to the first insert kit hole.

[0012] Figure 4 is a second cross-sectional view schematically showing the structure of the metal mold and the ejection mechanism.

[0013] Figure 5A is a first structural example of the slide plate. Figure 5B is a second structural example of the slide plate. Figure 5C isFigure 5A Cross-sectional view of the VC-VC line.

[0014] Figure 6 It is a schematic structural diagram of the control device of the injection molding machine according to the embodiment.

[0015] Figure 7 It is a flowchart illustrating the process of the control method of the injection molding machine according to the embodiment.

[0016] Figure 8 It is the first figure for explaining the gap opening step.

[0017] Figure 9 It is the second figure for explaining the gap opening step.

[0018] Figure 10 It is a timing chart exemplifying the control states of the slide plate, the ejector plate, and the movable pressure plate of the control method.

[0019] Figure 11 It is the first figure for explaining the insertion control step.

[0020] Figure 12 It is the second figure for explaining the insertion control step.

[0021] Figure 13 It is the first figure for explaining the blanking step.

[0022] Figure 14 It is the second figure for explaining the blanking step.

[0023] Figure 15 It is the first figure for explaining the mold opening step and the pulling-out control step.

[0024] Figure 16A It is the second figure for explaining the mold opening step and the pulling-out control step. Figure 16B It is the third figure for explaining the mold opening step and the pulling-out control step.

[0025] Figure 17 It is the figure for explaining the pushing-out step.

[0026] Figure 18 It is the structural diagram of the insertion part of Modification 3.

[0027] Figure 19 It is the figure showing the state of inserting the insertion part of Modification 3 into the gap.

[0028] Figure 20 It is the figure for explaining the blanking process of Modification 3.

[0029] Figure 21 It is the fourth structural example of the slide plate. Detailed implementation mode

[0030] Hereinafter, preferred embodiments will be enumerated to explain in detail the control device and control method of the injection molding machine of the present invention.

[0031] [Embodiment]

[0032] Figure 1 It is a structural diagram of the injection molding machine 10 of the embodiment.

[0033] First, the overall structure of the injection molding machine 10 of the present embodiment will be described. The injection molding machine 10 includes an injection device 12, a mold clamping device 14, a mold 16, a ejecting mechanism 18 ( Figure 4 ), and a sliding mechanism 20. In addition, it also includes a machine base 22 that supports at least one of the injection device 12 and the mold clamping device 14 (both in the Figure 1 structural example).

[0034] The injection device 12 is a device that melts and measures the resin R and then injects the molten resin R ( Figure 8 ) from the nozzle 24 toward the mold 16. Figure 1 In the example, an in-line screw type injection device 12 is illustrated, but the structure of the injection molding machine 10 of the present embodiment is not limited thereto. The injection molding machine 10 may also include, for example, a pre-plasticizing type injection device instead of the in-line screw type injection device 12.

[0035] In addition, in the present embodiment, the melting, metering, and injection of the resin R can also be realized based on known technologies. Therefore, the detailed description of the melting, metering, and injection of the resin R will be omitted hereinafter.

[0036] The mold clamping device 14 is a device that not only opens and closes the mold 16 but also applies a mold clamping force to the closed mold 16. In the present embodiment, a mold clamping device 14 having a so-called toggle structure will be described. However, as long as the opening and closing of the mold 16 and the application of the mold clamping force can be achieved, the structure of the mold clamping device 14 is not limited thereto.

[0037] The mold clamping device 14 includes a rear pressure plate 26, a movable pressure plate 28, a movable side mounting plate 30, a fixed pressure plate 32, a plurality of connecting rods 34, a fixed side mounting plate 36, a ball screw mechanism 38, and a toggle mechanism 40.

[0038] Among the rear pressure plate 26, the movable pressure plate 28, and the fixed pressure plate 32, the rear pressure plate 26 is arranged in the opening direction of the mold 16 relative to the injection device 12 ( Figure 1)The farthest in the [direction], the fixed platen 32 is configured to be the closest to the injection device 12. The rear platen 26 and the fixed platen 32 are interconnected by a plurality of connecting rods 34. The movable platen 28 is disposed between the rear platen 26 and the fixed platen 32 in the opening and closing direction, and is inserted through by the plurality of connecting rods 34 that connect the rear platen 26 and the fixed platen 32.

[0039] On the movable platen 28, a movable-side mounting plate 30 is mounted on the surface on the side of the fixed platen 32. The movable-side mounting plate 30 is a component for holding the movable mold 64 of the mold 16 described later.

[0040] On the fixed platen 32, a receiving portion 42 for receiving the nozzle 24 of the injection device 12 is provided, and a fixed-side mounting plate 36 is provided on the side of the movable platen 28 of the receiving portion 42.

[0041] The fixed-side mounting plate 36 is a component for holding the fixed mold 62 of the mold 16 described later. On the surface of the fixed mold 62 on the side of the movable platen 28, a plurality of guide pins 44 protruding in the opening and closing direction are provided. In addition, a flow path 78 of the resin R injected by the injection device 12 is provided in the fixed-side mounting plate 36 ( Figure 4 ) a part of. It should be noted that when only "mounting plate" is described below, unless otherwise specified, it refers to the fixed-side mounting plate 36.

[0042] The ball screw mechanism 38 is connected to the rear platen 26 and the toggle mechanism 40. The ball screw mechanism 38 includes: a screw shaft 46 that rotates about an axial center parallel to the opening and closing direction; and a nut 48 that linearly moves along the screw shaft 46 when the screw shaft 46 rotates. In addition, a servo motor 50, a drive pulley 52, a belt 54, and a driven pulley 56 are also provided.

[0043] Among them, the drive pulley 52 is a pulley connected to the rotating shaft of the servo motor 50 and rotates integrally with the rotating shaft. The belt 54 is stretched between the drive pulley 52 and the driven pulley 56, and transmits the rotational force generated by the servo motor 50 to the driven pulley 56 via the drive pulley 52 and itself. The driven pulley 56 is a pulley provided so as to be able to rotate integrally with the screw shaft 46, and rotates the screw shaft 46 by the rotational force of the servo motor 50.

[0044] In addition, the toggle mechanism 40 is connected to the movable platen 28. The toggle mechanism 40 includes: a crosshead 58 that is provided to be able to linearly move integrally with the nut 48; and a plurality of toggle linkages 60 that transmit the linear motion power from the crosshead 58 to the movable platen 28.

[0045] According to the structure of the mold clamping device 14 described above, by driving the servo motor 50, the movable platen 28 can be moved along the opening and closing direction.

[0046] Figure 2 is a first sectional view schematically showing the structures of the mold 16 and the ejector mechanism 18.

[0047] The mold 16 forms the resin R ejected from the injection device 12 into the shape of a molded product, and is disposed between the movable platen 28 and the fixed platen 32. The mold 16 includes a fixed mold 62 on the fixed platen 32 side and a movable mold 64 on the movable platen 28 side.

[0048] In the present embodiment, the fixed mold 62 is the female mold of the mold 16. Guide holes 66 corresponding to the number and arrangement of the guide pins 44 are provided in the fixed mold 62. The fixed mold 62 is held on the mounting plate 36 by inserting the guide pins 44 of the mounting plate 36 into the guide holes 66. According to this structure, the fixed mold 62 can be separated and contacted with respect to the mounting plate 36 in the opening and closing directions along the guide pins 44.

[0049] In addition, a first insert member hole 68 penetrating the fixed mold 62 in the opening and closing directions is provided in the fixed mold 62. An insert member 70 is inserted through the first insert member hole 68.

[0050] Figure 3 is a sectional view for explaining the insert member 70 and the first insert member hole 68. In addition, Figure 3 is Figure 2 an enlarged view of the dotted line area (X) shown.

[0051] The insert member 70 inserted through the first insert member hole 68 can slide and move in the first insert member hole 68 in the opening and closing directions. Fasteners 72A and 72B are provided at both ends of the insert member 70.

[0052] The fastener 72A is a fastener housed in the opening side 68a of the first insert member hole 68. Here, the fastener 72A and the opening side 68a of the first insert member hole 68 are wider than the central portion 68c of the first insert member hole 68. Thereby, it is possible to prevent the insert member 70 from falling off to the closing direction side of the first insert member hole 68.

[0053] In addition, the shape of the fastener 72A is a shape that blocks the first insert member hole 68 when viewed from the opening direction side. Thereby, when the resin R is filled into the mold 16, it is possible to prevent the resin R from entering the first insert member hole 68.

[0054] The fastener 72B is a fastener housed in the closing direction side 68b of the first insert member hole 68. Here, the fastener 72B and the closing direction side 68b of the first insert member hole 68 are wider than the central portion 68c of the first insert member hole 68. Thereby, it is possible to prevent the insert member 70 from falling off to the opening direction side of the first insert member hole 68.

[0055] By disposing the above-described first insert member hole 68 in the fixed die 62, when punching the resin R with a punching pin 86 described later, a part r of the punched resin R can be extruded into the first insert member hole 68. Figure 13 ) Further, by previously inserting the slidable insert member 70 into the first insert member hole 68, it is possible to prevent the resin R from entering the first insert member hole 68 at the moment before punching. Therefore, it is possible to prevent the shape of the first insert member hole 68 (unexpected shape) from appearing in a part of the shape of the molded product.

[0056] The movable die 64 is the male die of the die 16 in the present embodiment. The movable die 64 moves in the opening and closing direction as the movable platen 28 moves in the opening and closing direction, and thus separates from and contacts the fixed die 62.

[0057] In addition, holes for receiving the guide pins 44 inserted through the fixed die 62 are appropriately provided in the movable die 64. Thus, in the mold closing process, the situation where the crimping of the movable die 64 and the fixed die 62 in the opening and closing direction is obstructed by the guide pins 44 is avoided.

[0058] Furthermore, a mold closing locator (parting lock) 74 for connecting the fixed die 62 and the movable die 64 with a predetermined connecting force is provided in the die 16. In the present embodiment, the mold closing locator 74 is a spring locking type mold closing locator. However, the mold closing locator 74 is not limited to the spring locking type, and may be, for example, a plastic locking type.

[0059] Regarding the above-described die 16, "closing" the die 16 means that the fixed die 62 and the movable die 64 are crimped in the opening and closing direction ( Figure 4 ). In addition, "opening" the die 16 means that the fixed die 62 and the movable die 64 are separated in the opening and closing direction ( Figure 17 ). The process of closing the die 16 is also referred to as the "mold closing process", and the process of opening the die 16 is also referred to as the "mold opening process".

[0060] By closing the die 16, a cavity 76 is formed between the movable die 64 and the fixed die 62. In the present embodiment, the cavity 76 refers to a void.

[0061] In the chamber 76, the resin R ejected from the injection device 12 is filled through the flow path 78 (runner, gate, and sprue) provided in the fixed mold 62 and the mounting plate 36. The resin R filled in the chamber 76 is cooled and thus solidifies in a state where the contour of the molded product is obtained. The process of cooling the filled resin R is also referred to as the "cooling process".

[0062] The state where the mold 16 is closed is maintained not only by connecting the movable mold 64 and the fixed mold 62 using the mold clamping locator 74 but also by applying a mold clamping force from the side of the movable mold 64 by the mold clamping device 14. In particular, the process of the mold clamping device 14 applying the mold clamping force is also referred to as the "mold clamping process".

[0063] In addition, as described above, the fixed mold 62 can be separated from the mounting plate 36 in the opening direction. Therefore, when the movable platen 28 is pulled in the opening direction with a force lower than the connecting force of the mold clamping locator 74 while the mold 16 is in the closed state, the closed state of the mold 16 can be maintained and a gap 80 ( Figure 9 ) is generated between the fixed mold 62 and the mounting plate 36. The following insertion member 92 is inserted and removed through the gap 80.

[0064] The ejector mechanism 18 is a mechanism including the ejector plates 82A, 82B, a plurality of ejector members (86, 88, 90), and an ejector device 84. The ejector plates 82A, 82B are plates provided on the side of the movable mold 64 in the fixed mold 62 and the movable mold 64. The ejector plate 82A and the ejector plate 82B are arranged with a positional offset in the opening and closing direction, and the ejector plate 82B is closer to the fixed mold 62 side than the ejector plate 82A.

[0065] The above-described ejector device 84 is a device that linearly moves the ejector plates 82A, 82B along an ejection direction parallel to the opening and closing direction. Such an ejector device 84 has, for example, a ball screw mechanism, a hydraulic or pneumatic cylinder, and a servo motor, and thus can linearly move the ejector plates 82A, 82B.

[0066] The plurality of ejector members of the ejector mechanism 18 include a blanking pin 86 provided on the ejector plate 82A, an ejector pin 88 provided on the ejector plate 82B, and a cutter 90 provided on the ejector plate 82A. Hereinafter, these ejector members moving toward the fixed mold 62 side in the ejection direction are simply referred to as "ejection".

[0067] The blanking pin 86 is a pin component that blanks a part r of the resin R filled in the cavity 76. The punching-out pin 86 is pushed out by moving the ejector plate 82A toward the fixed mold 62 side. Thereby, a molded product having a hole can be easily formed. The process of opening a hole in the molded product using the blanking pin 86 is also referred to as the "blanking process" and is performed in a state where the mold 16 is closed.

[0068] The blanking pin 86 is arranged to be opposite to the first insert hole 68 provided in the fixed mold 62 in the pushing-out direction. Thus, the blanked portion in the resin R is extruded into the first insert hole 68 located in front of the pushing-out direction of the blanking pin 86. At this time, the insert 70 inserted into the first insert hole 68 moves toward the fixed-side mounting plate 36 side along with the pushing-out.

[0069] The ejector pin 88 in the ejecting member is a pin component that ejects the resin R (molded product) cured in the cavity 76 when the mold 16 is in the open state. Since the ejector pin 88 is provided on the ejector plate 82B, even if the ejector plate 82A moves during the blanking process, it will not move itself and will not penetrate the resin R in the cavity 76. The ejector pin 88 is translated together with the ejector plate 82B by moving the ejector plate 82B driven by the ejecting device 84 toward the fixed mold 62 side, and ejects the molded product formed in the cavity 76.

[0070] The process of ejecting the molded product using the ejector pin 88 is also referred to as the "ejecting process". By performing the ejecting process, the molded product can be easily taken out from the mold 16.

[0071] The cutter 90 is pushed out not toward the mold cavity 76 but toward the gate of the resin flow path 78 of the resin R. The cutter 90 is pushed out in a state where the mold 16 is closed, similarly to the blanking process, whereby the molded product (resin R in the cavity 76) and the resin R other than the molded product (resin R of the gate, runner, and sprue) can be cut off. This cutting is also referred to as "gate cutting", and the process of performing gate cutting is also referred to as the "gate cutting process". Since both the blanking process and the gate cutting process are performed in a state where the mold 16 is closed, they can be executed in parallel.

[0072] The sliding mechanism 20 includes an insertion member 92 and a sliding device 94 ( Figure 1 ). Among them, in the present embodiment, the insertion member 92 is a plate-shaped member whose thickness direction is parallel to the pushing-out direction. In the present embodiment, the plate-shaped insertion member 92 is also referred to as a sliding plate 92. In addition, the insertion member 92 is not limited to a plate-shaped member (sliding plate). This will be described later in the modification example.

[0073] In addition, the sliding device 94 is a device for inserting and removing the slide plate 92 into and from the gap 80 between the fixed die 62 and the mounting plate 36, which is generated by integrally moving the fixed die 62 and the movable die 64 in the opening direction.

[0074] The sliding device 94 of the present embodiment reciprocates the slide plate 92 in a linear motion between a predetermined insertion start position (ejection completion position) and a predetermined insertion completion position in the insertion and removal direction orthogonal to the ejection direction, thereby achieving the above-mentioned insertion and removal. Such a sliding device 94 may also have a ball screw mechanism similar to the mold clamping device 14, thereby linearly moving the slide plate 92, or may linearly move the slide plate 92 by having a hydraulic or pneumatic cylinder.

[0075] Figure 4 It is a second cross-sectional view schematically showing the structure of the die 16 and the ejection mechanism 18.

[0076] In the present embodiment, a case where the predetermined insertion start position is set below the gravity direction of the die 16 (the machine table 22 side when viewed from the die 16) and the sliding device 94 reciprocates the slide plate 92 along the gravity direction will be described. However, the direction in which the slide plate 92 reciprocates is not limited thereto. For example, it may be configured such that by setting the predetermined insertion start position above the gravity direction with respect to the gap 80, the slide plate 92 reciprocates in a linear motion between above the gap 80 and the gap 80. In addition, it may be configured such that the slide plate 92 reciprocates in a linear motion along the horizontal direction ( Figure 1 the depth direction and the front direction of the paper surface of the drawing). Moreover, from the viewpoint of being able to insert and remove the slide plate 92 with respect to the gap 80, it may also be a device that does not linearly move the slide plate 92 but swings like a pendulum to insert and remove into the above-mentioned gap 80.

[0077] Figure 5A It is a first structural example of the slide plate 92. In addition, Figure 5A The perspective view is the thickness direction of the slide plate 92.

[0078] The slide plate 92 will be further described. The slide plate 92 is configured as a group of a pair of plate members, for example, as Figure 5A shown. Thereby, when the slide plate 92 is inserted into the gap 80 between the fixed die 62 and the fixed-side mounting plate 36, it is possible to prevent the insertion from being hindered by the flow path 78 (runner) and the resin R solidified in the shape of the flow path 78.

[0079] Figure 5B It is a second structural example of the slide plate 92. Figure 5B The perspective view is the same as Figure 5A and is the thickness direction of the slide plate 92.

[0080] In addition, the sliding plate 92 can also be configured as follows. Figure 5B That is. Figure 5B The sliding plate 92 is not a structure in which two plates are set as a group, but is a structure formed by a single substantially U-shaped plate, which is different from the structure example of Figure 5A . Even in the structure of Figure 5B , when the sliding plate 92 is inserted into the gap 80 between the fixed mold 62 and the fixed-side mounting plate 36, it is possible to prevent the insertion from being obstructed by the flow path 78 (runner) of the mold 16.

[0081] Common to the structures shown in each of Figure 5A and Figure 5B is that a second insert kit hole 96 is provided in the sliding plate 92. The second insert kit hole 96 is a hole that communicates with the first insert kit hole 68 of the fixed mold 62 in the ejection direction when the sliding plate 92 is inserted into the gap 80 between the fixed mold 62 and the fixed-side mounting plate 36. Even in a state where the sliding plate 92 is inserted into the gap 80 through the second insert kit hole 96, it is allowed to eject the insert kit 70 and a part r of the resin R toward the fixed-side mounting plate 36 by the ejector pin 88 in the blanking process.

[0082] In addition, in Figure 5A and Figure 5B , the molded product position 98 shown by the dotted line is a region juxtaposed with the cavity 76 (molded product) in the ejection direction in a state where the sliding plate 92 is inserted into the gap 80. Similarly, the runner gate portion 100 shown by the dotted line is a region juxtaposed with the runner and gate of the flow path 78 of the mold 16 in the ejection direction in a state where the sliding plate 92 is inserted into the gap 80.

[0083] Figure 5C is Figure 5A a cross-sectional view of the VC-VC line of

[0084] The thickness of the sliding plate 92 and the length (depth) L of the second insert kit hole 96 in the ejection direction 92 are not less than the thickness of the resin R blanked out by the blanking process.

[0085] In addition, on the side 96u of the second insert kit hole 96 on the insertion direction side into the gap 80, it is preferably a ramp shape that narrows the width (diameter) of the second insert kit hole 96 from the fixed mold 62 side to the mounting plate 36 side when the sliding plate 92 is inserted into the gap 80. For example, in the case of a structure in which the sliding plate 92 is inserted into the gap 80 from below to above as in the present embodiment, the above-mentioned ramp shape is as shown in Figure 5Cis given to the side surface 96u above the second fitting hole 96 as described above. Further, when the ramp shape is given to the second fitting hole 96, the ramp shape is given to all the second fitting holes 96 of the slide plate 92.

[0086] Accordingly, when the slide plate 92 is pulled out from the gap 80, it is possible to prevent the fitting member 70 and the fastener 72B that enter the second fitting hole 96 from obstructing the pulling out of the slide plate 92. Further, accordingly, it is possible to smoothly push back the fitting member 70 toward the chamber 76 side while pulling out the slide plate 92.

[0087] The above is the overall structure of the injection molding machine 10. Next, the control device 102 of the present embodiment will be described.

[0088] Figure 6 is a schematic structural diagram of the control device 102 of the injection molding machine 10 of the embodiment.

[0089] The control device 102 is a device provided for controlling the injection molding machine 10. The control device 102 is connected to the injection device 12, the mold clamping device 14, the ejecting device 84, and the sliding device 94 ( Figure 1 ), and controls them. However, the description of the structural elements that the control device 102 can include for controlling the injection device 12 is omitted below.

[0090] The control device 102 includes a display unit 104, an operation unit 106, a storage unit 108, and an arithmetic unit 110.

[0091] The display unit 104 is a display device having a screen for displaying information. The screen of the display unit 104 is not limited, and for example, is a liquid crystal screen.

[0092] The operation unit 106 is a structure provided for an operator to input information to the control device 102, and is composed of, for example, a keyboard, a mouse, or a touch panel mounted on the screen of the display unit 104.

[0093] The storage unit 108 stores information. The storage unit 108 is composed of hardware such as a RAM (Random Access Memory) and a ROM (Read Only Memory), for example. In the present embodiment, the storage unit 108 stores a predetermined control program 112 in advance.

[0094] The control program 112 is a program that defines a control method (hereinafter, simply referred to as "control method") for the injection molding machine 10 that performs a blanking process with good reliability. The control method will be described in detail later.

[0095] The operation unit 110 processes information through operations. The operation unit 110 is composed of hardware such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit), for example.

[0096] In addition, the operation unit 110 of the present embodiment includes a mold opening / closing unit 114, an insert component control unit 116, a position acquisition unit 118, a determination unit 120, and a push-out control unit 122. These units are implemented by the operation unit 110 reading and executing the control program 112.

[0097] The mold opening / closing unit 114 basically controls the opening and closing of the mold 16 by controlling the mold clamping device 14. However, in the present embodiment, a gap 80 is also left between the fixed mold 62 and the fixed-side mounting plate 36. The mold opening / closing unit 114 controls the mold clamping device 14 from the state where the mold 16 is closed, and moves the fixed mold 62 and the movable mold 64 integrally in the opening direction of the mold 16, thereby leaving a gap 80 between the fixed mold 62 and the fixed-side mounting plate 36.

[0098] The insert component control unit 116 inserts the slide plate 92 into the gap 80 by controlling the sliding device 94, so that the first insert component hole 68 of the fixed mold 62 and the second insert component hole 96 of the slide plate 92 are adjacent in the push-out direction. In addition, the insert component control unit 116 also performs the following control: after the blanking pin 86 is pushed out by the blanking control unit described later, the slide plate 92 is pulled out from the gap 80. In addition, the determination of whether the gap 80 is left can be performed, for example, by receiving a signal indicating that the gap 80 is left from the mold opening / closing unit 114.

[0099] The position acquisition unit 118 acquires the position of the slide plate 92 in the insertion / extraction direction. As Figure 6 shown, in the present embodiment, it has a first position acquisition unit 124 and a second position acquisition unit 126.

[0100] The first position acquisition unit 124 acquires the position of the slide plate 92 in the insertion direction when the slide plate 92 is inserted into the gap 80. When the slide plate 92 inserted into the gap 80 reaches a predetermined insertion determination position, the first position acquisition unit 124 outputs a predetermined detection signal (first signal) to the determination unit 120 described later.

[0101] The second position acquisition unit 126 acquires the position of the slide plate 92 in the extraction direction when the slide plate 92 is pulled out from the gap 80. When the slide plate 92 pulled out from the gap 80 reaches a predetermined extraction position, the second position acquisition unit 126 outputs a predetermined detection signal (second signal) to the determination unit 120 described later.

[0102] In addition, in order to obtain the position of the slide plate 92, it is necessary to detect the position of the slide plate 92 in advance as a prerequisite. For example, this can be achieved by appropriately arranging a position detector such as a linear scale on the sliding device 94 or the mold 16 and inputting the detection signal of this detector into the position acquisition unit 118.

[0103] The determination unit 120 determines whether the slide plate 92 is inserted into the gap 80 and whether it has been pulled out. The determination unit 120 of the present embodiment determines whether the slide plate 92 is inserted into the gap 80 based on whether a first signal is input from the first position acquisition unit 124 to the determination unit 120. In addition, the determination unit 120 of the present embodiment determines whether the slide plate 92 is pulled out from the gap 80 based on whether a second signal is input from the second position acquisition unit 126 to the determination unit 120.

[0104] When it is determined that the slide plate 92 is inserted into the gap 80, the punching pin 86 is pushed out by the pushing control unit 122. Thus, in the present embodiment, the punching process is performed in a state where the slide plate 92 is inserted into the gap 80. In addition, at this time, by adopting a structure in which the cutting tool 90 is pushed out together with the punching pin 86, the gate cutting process can be performed in parallel with the punching process.

[0105] In addition, when it is determined that the slide plate 92 is pulled out from the gap 80 after the punching pin 86 is pushed out, the ejector pin 88 is pushed out by the pushing control unit 122. Thus, the ejecting process for taking out the molded product from the mold 16 is performed.

[0106] The above is a structural example of the injection molding machine 10 and its control device 102 of the present embodiment. Next, the control method of the injection molding machine 10 of the present embodiment executed by the control device 102 will be described.

[0107] Figure 7 is a flowchart exemplifying the flow of the control method of the injection molding machine 10 of the embodiment.

[0108] The control method of the present embodiment is performed after filling the resin R into the cavity 76 of the mold 16, that is, after the so-called injection process. This control method includes a gap opening step (S1), an insertion control step (S2), an insertion determination step (S3), and a punching step (S4). In addition, in the present embodiment, it further includes a pulling-out control step (S5), a pulling-out determination step (S6), a mold opening step (S7), and an ejecting step (S8).

[0109] Figure 8 is the first diagram for explaining the gap opening step. In addition, Figure 9 is the second diagram for explaining the gap opening step. In addition, Figures 8 - 9 The perspective is the same as Figure 4The same perspective as the perspective of

[0110] The gap opening step is a step of moving the fixed metal mold 62 and the movable metal mold 64 integrally in the opening direction of the metal mold 16 from the state where the metal mold 16 is closed. This step is performed by the mold opening and closing unit 114. More specifically, after filling the resin R into the chamber 76 ( Figure 8 ), the mold opening and closing unit 114 controls the mold clamping device 14 to pull the movable platen 28 in the opening direction with a force lower than the connecting force of the mold clamping locator 74. Thereby, a gap 80 can be created between the fixed metal mold 62 and the mounting plate 36 ( Figure 9 ).

[0111] Figure 10 is a timing chart showing the control states of the slide plate 92, the ejector plates 82A and 82B, and the movable platen 28, which illustrate the control method.

[0112] In Figure 10 the timing chart, the time period during which the gap opening step is performed is the time period from t1 to t2. As can be seen from Figure 10 , when the gap opening step is performed, the movable platen 28 moves from the mold closing position, which is the position for closing the metal mold 16, to the insertion standby position. The insertion standby position is a position closer to the opening direction than the mold closing position and is a position for creating a gap 80 between the fixed metal mold 62 and the mounting plate 36.

[0113] In addition, during the time period from t1 to t2, the positions of the ejector plates 82A and 82B are maintained at positions where neither blanking nor ejection is performed during this time period. In the present embodiment, for the sake of convenience, this position is referred to as the retracted position. In addition, Figure 10 the positions of the ejector plates 82A and 82B shown are relative positions with respect to the movable metal mold 64.

[0114] The insertion control step is a step of inserting the slide plate 92 into the gap 80 created by performing the gap opening step. This step is performed by the insertion member control unit 116.

[0115] Figure 11 is the first diagram for explaining the insertion control step. In addition, Figure 12 is the second diagram for explaining the insertion control step. In addition, Figures 11 - 12 The perspective of Figure 4 is the same perspective as the perspective of

[0116] The time period during which the insertion control step is performed is Figure 10 the time period from t2 to t3 of Figure 11)。At this time, when a gap 80 is generated between the sliding plate 92 and the fixed metal mold 62 or between the sliding plate 92 and the mounting plate 36, the movable platen 28 is moved in the closing direction to bring the sliding plate 92 into close contact with the fixed metal mold 62 and the mounting plate 36. Figure 12 )。

[0117] In addition, during this time period (t2 - t3), in parallel with the insertion control step, an insertion determination step based on the determination unit 120 is performed. The insertion determination step is a step of determining whether the sliding plate 92 has reached a predetermined insertion position. As described above, this determination can be achieved based on whether a first signal is input from the first position acquisition unit 124 to the determination unit 120.

[0118] When it is determined that the sliding plate 92 has reached the predetermined insertion determination position, the blanking step is executed. The blanking step is a step of performing the above-described blanking process and is executed by the ejection control unit 122.

[0119] Figure 13 is the first diagram for explaining the blanking step. Figure 14 is the second diagram for explaining the blanking step.

[0120] The time period for performing the blanking step is Figure 10 the time period of t4 - t5. When the blanking step is executed, the ejector plate 82A moves from the retracted position to the blanking position located closer to the ejection direction side. As a result, a part r of the resin R in the chamber 76 is ejected into the first insert fitting hole 68, and the blanking is completed. Figure 13 )。In addition, at the same time, the cutter 90 is pushed out toward the gate, and thus the gate cutting is also completed. Immediately after the blanking, the insert fitting 70 slides and moves toward the second insert fitting hole 96 of the sliding plate 92. Figure 14 )。

[0121] When the blanking pin 86 blanks the resin R, the case where the fixed metal mold 62 moves in the opening direction is suppressed by the movable metal mold 64. In addition, the case of moving in the closing direction is suppressed by the sliding plate 92 inserted in such a way as to fill the gap 80 between the fixed metal mold 62 and the mounting plate 36. Therefore, according to the present embodiment, even if the blanking pin 86 blanks the resin R with a force exceeding the connecting force of the mold closing locator 74, the metal mold 16 will not open due to this force, and the connection between the movable metal mold 64 and the fixed metal mold 62 is maintained. Thus, according to the present embodiment, the blanking process can be performed with good reliability.

[0122] The blanking pin 86 that has blanked the resin R retracts temporarily to a position (blanking holding position) that does not obstruct the extraction of the sliding plate 92 during the time period of t5 - t6 after that.

[0123] In addition, referring toFigure 10 It can be seen that the blanking step can start before the sliding plate 92 reaches the predetermined insertion completion position. This can be achieved by taking into account the speed at which the ejector plate 82A moves in the ejection direction and the speed of inserting the sliding plate 92, and performing blanking approximately simultaneously with the sliding plate 92 reaching the predetermined insertion completion position.

[0124] Figure 15 It is the first diagram for explaining the mold opening step and the pulling-out control step.

[0125] The mold opening step is the step of opening the mold 16. This step is executed by the mold opening and closing unit 114. More specifically, the mold opening and closing unit 114 controls the mold clamping device 14 in the time period of t6 - t7 of Figure 10 to pull the movable platen 28 in the opening direction with a force exceeding the connecting force of the mold clamping locator 74. As a result, the movable platen 28 moves to the mold opening position where the mold 16 opens ( Figure 10 ), and the mold 16 is opened.

[0126] The pulling-out control step is the step of pulling out the sliding plate 92 from the gap 80 after the blanking step. This step is executed by the insertion member control unit 116. The pulling-out control step can be performed in parallel with the mold opening step ( Figure 10 ).

[0127] Figure 16A It is the second diagram for explaining the mold opening step and the pulling-out control step. Figure 16B It is the third diagram for explaining the mold opening step and the pulling-out control step. The viewing angles are the same as those of Figure 3 .

[0128] In the pulling-out control step, the sliding plate 92 is slid in the pulling-out direction. At this time, the insert kit 70, due to the ramp shape given in the second insert kit hole 96, is pushed back to the fixed mold 62 as the sliding plate 92 slides in the pulling-out direction ( Figure 16B ). Moreover, by further pulling out the sliding plate 92, it can come out of the second insert kit hole 96 and return to the state shown in Figure 3 .

[0129] Furthermore, in the time period (t6 - t7) when the mold opening step and the pulling-out control step are being performed, the pulling-out determination step based on the determination unit 120 is also performed. The pulling-out determination step is the step of determining whether the sliding plate 92 has reached the predetermined pulling-out determination position. As described above, this determination can be achieved based on whether a second signal is input from the second position acquisition unit 126 to the determination unit 120.

[0130] Figure 17 It is a diagram for explaining the ejection step.

[0131] When it is determined that the slide plate 92 has reached the predetermined extraction determination position, the ejection step is executed. The ejection step is a step of executing the ejection process described above, and is executed by the ejection control unit 122 in the same manner as the blanking step. By executing the ejection step, the formed product can be easily removed from the mold 16( Figure 17 ).

[0132] The time period for executing the ejection step is Figure 10 the time period of t8 - t9. Referring to Figure 10 it can be seen that the ejection step can start before the slide plate 92 reaches the predetermined extraction completion position (insertion start position) and before the movable platen 28 reaches the mold opening position. This is achieved by taking into account both the speed at which the ejector plate 82B moves in the ejection direction and the speed at which the slide plate 92 is extracted. That is, it can be achieved by completing the mold opening and ejecting the formed product approximately simultaneously when the slide plate 92 reaches the predetermined extraction completion position. However, the ejection step can also start after the mold 16 is opened, that is, Figure 10 after t7 when the movable platen 28 reaches the mold opening position.

[0133] According to the above control method, the blanking process can be carried out with good reliability. In addition, after the ejection step is completed, by closing the mold 16, it can be made into a state where the resin R can be filled into the cavity 76 again. That is, the above control method can be applied as a part of the so-called forming cycle, and the control device 102 that executes this control method contributes to the efficient mass production of high-quality formed products.

[0134] [Modification Example]

[0135] Above, the embodiment has been described as an example of the present invention. In the embodiment, various changes or improvements can be made. In addition, as can be seen from the description of the scope of the claimed patent, the embodiments with such changes or improvements can be included within the technical scope of the present invention.

[0136] (Modification Example 1)

[0137] In the embodiment, the structure in which the determination unit 120 determines whether the slide plate 92 is inserted into the gap 80 based on the position of the slide plate 92 obtained by the first position acquisition unit 124 has been described. However, the structure of the control device 102 is not limited to this.

[0138] For example, if the insertion speed of the slide plate 92 relative to the gap 80 is known, it is also possible to determine whether the insertion is completed based on the elapsed time since the start of the insertion of the slide plate 92. That is, the insertion member control unit 116 of the control device 102 can also insert the sliding member into the gap 80 at a first speed. Moreover, in this case, the determination unit 120 can also determine whether the slide plate 92 has been inserted based on whether a first predetermined time has elapsed after the start of the insertion of the slide plate 92. It should be noted that the measurement of the elapsed time can be easily achieved by the arithmetic unit 110 implementing a timer function.

[0139] Thus, similarly to the embodiment, a control device 102 and a control method for an injection molding machine 10 that perform a blanking process with good reliability are provided. In addition, in the case of the structure of this modification, the first position acquisition unit 124 can be omitted from the structure of the control device 102.

[0140] (Modification 2)

[0141] In the embodiment, a structure in which the determination unit 120 determines whether the slide plate 92 has been pulled out from the gap 80 based on the position of the slide plate 92 acquired by the second position acquisition unit 126 has been described. However, the structure of the control device 102 is not limited to this.

[0142] For example, if the pulling-out speed of the slide plate 92 relative to the gap 80 is known, it is also possible to determine whether the pulling-out is completed based on the elapsed time since the start of the pulling-out of the slide plate 92. That is, the insertion member control unit 116 of the control device 102 can also pull out the sliding member from the gap 80 at a second speed. Moreover, in this case, the determination unit 120 can also determine whether the slide plate 92 has been pulled out based on whether a second predetermined time has elapsed after the start of the pulling-out of the slide plate 92. In addition, the measurement of the elapsed time can be easily achieved by the arithmetic unit 110 implementing a timer function, similarly to Modification 1.

[0143] Thus, similarly to the embodiment, a control device 102 and a control method for an injection molding machine 10 that perform a blanking process with good reliability are provided. In addition, in the case of the structure of this modification, the second position acquisition unit 126 can be omitted from the structure of the control device 102.

[0144] (Modification 3)

[0145] Figure 18 It is a structural diagram of the insertion member 92' for explaining Modification 3.

[0146] The insertion member 92 is not limited to the slide plate formed with the second nested member hole 96. An example is illustrated in Figure 18 . For convenience, the insertion member 92 of this modification is also referred to as the insertion member 92'.

[0147] The illustrated insertion member 92' is a cylindrical or prism-shaped member with its long side in the opening and closing direction, and is inserted into the gap 80 in a manner that it is not adjacent to the first nesting member hole 68 in the opening and closing direction. Figure 18 As shown, two insertion members 92' are prepared and inserted into the first nesting hole 68 at one side (upper side) and the other side (lower side) in the gravity direction. Thus, the pressing force received from the fixed metal mold 62 and the mounting plate 36 when inserting into the gap 80 is dispersed to the two insertion members 92', and the possibility of deformation of the insertion members 92' due to the pressing force can be reduced.

[0148] Figure 19 This is a diagram showing a state where an insertion member 92 ′ according to Modification 3 is inserted into the gap 80 .

[0149] In this modification, unlike the embodiment, the gap 80 can be prevented from being filled by inserting the insertion member 92'. In addition, in this modification, the nesting member 70 is provided on the mounting plate 36. Figure 3 The central portion 68c of the illustrated first nest hole 68 has the same width as the opening direction side 68a in this modification, allowing the nest 70 to be inserted and removed from the first nest hole 68. Therefore, the first nest hole 68 maintains a state of communicating with the gap 80 while the insertion member 92' is inserted into the gap 80.

[0150] Figure 20 It is a diagram for explaining the punching step of Modification Example 3.

[0151] exist Figure 20 , the case where the punching pin 86 is pushed out while the insertion member 92' is inserted into the gap 80 is illustrated. When the punching pin 86 is pushed out, the movement of the fixed metal mold 62 in the opening direction is suppressed by the movable metal mold 64, and the movement in the closing direction is suppressed by the insertion member 92', which is the same as the embodiment. Therefore, in this modified example, the punching process can be performed with good reliability.

[0152] In this way, the punching process can be performed with high reliability even by using the insert member 92' without forming the second nesting hole 96. A part r of the punched resin R is discharged when the mold is opened.

[0153] also, Figure 18 The insertion member 92' illustrated in the figure is a columnar member whose long side is in the opening and closing direction, but the structure of the insertion member 92' is not limited thereto. The insertion member 92' may be a block-shaped member or a plate-shaped member, for example.

[0154] In addition, Figure 19 In, from Figure 18The insertion member 92' is inserted along the direction of gravity. The sliding direction of the insertion member 92' during insertion and removal is the same as that of the insertion member 92 in the embodiment, and is not limited to the direction of gravity.

[0155] In addition, Figure 18 illustrates a structure in which two insertion members 92' are provided, but the structure of this modification is not limited thereto. For example, a cylindrical member having an opening penetrating in the opening and closing direction may be inserted into and removed from the gap 80.

[0156] (Modification 4)

[0157] Figure 21 This is the fourth structural example of the sliding plate 92. Hereinafter, for convenience, the sliding plate 92 of Figure 21 is also referred to as the sliding plate 92".

[0158] In the embodiment, the structure of the injection molding machine 10 that forms holes in the molded product has been described, but the embodiment can also be applied to the case where a cut is formed in the molded product. In this case, as Figure 21 shown, a second insert hole 96 (hereinafter referred to as "second insert hole 96'") for forming a cut in the molded product is provided on the sliding plate 92". In the blanking process, a cut can be formed in the molded product by pushing out the blanking pin 86 into the second insert hole 96'.

[0159] In addition, the structure of the sliding plate 92" is not limited to Figure 21 the structure illustrated. That is, on the sliding plate 92", as Figure 21 shown, both a second insert hole 96 for forming a hole in the molded product and a second insert hole 96 (96') for forming a cut may be provided, or only one of them may be provided.

[0160] (Modification 5)

[0161] The embodiment and the above-described various modifications can be appropriately combined within a range that does not cause contradictions.

[0162] [Invention according to the embodiment]

[0163] Hereinafter, the invention that can be grasped based on the above embodiment and modification will be described.

[0164] <First Invention>

[0165] A control device 102 for an injection molding machine 10 having a metal mold 16, the metal mold 16 having a fixed metal mold 62 provided with a first insert hole 68 and a movable metal mold 64 that forms a cavity 76 together with the fixed metal mold 62, and opening and closing by separating and contacting the fixed metal mold 62 and the movable metal mold 64 with each other, wherein the injection molding machine 10 includes: a movable platen 28 that supports the movable metal mold 64 and separates and contacts the movable metal mold 64 from the fixed metal mold 62 by moving along the opening and closing direction of the metal mold 16; a fixed platen 32 that supports the fixed metal mold 62; a mold clamping locator 74 that connects the fixed metal mold 62 and the movable metal mold 64 when the movable platen 28 moves in the closing direction of the metal mold 16 and releases the connection when the metal mold 16 is opened; a mounting plate 36 that mounts the fixed metal mold 62 on the fixed platen 32; a blanking pin 86 that is pushed out in such a manner as to blank a part r of the resin R in the cavity 76 toward the mounting plate 36 side via the first insert hole 68 in order to form a molded product having at least one of a hole and a notch; and an insertion member 92 that is inserted between the fixed metal mold 62 and the mounting plate 36, and the control device 102 includes: a mold opening and closing section 114 that moves the fixed metal mold 62 and the movable metal mold 64 integrally in the opening direction of the metal mold 16 from the state where the metal mold 16 is closed, thereby creating a gap 80 between the fixed metal mold 62 and the mounting plate 36; an insertion member control section 116 that inserts the insertion member 92 into the gap 80; a determination section 120 that determines whether the insertion member 92 has been inserted into the gap 80; and a pushing control section 122 that pushes out the blanking pin 86 when it is determined that the insertion member 92 has been inserted into the gap 80.

[0166] Accordingly, a control device 102 for an injection molding machine 10 that performs a blanking process with good reliability is provided.

[0167] Alternatively, the insertion member control section 116 inserts the insertion member into the gap 80 at a first speed, and after the start of insertion of the insertion member 92, the determination section 120 determines whether the insertion member 92 has been inserted based on whether a first predetermined time has elapsed. Accordingly, the first position acquisition section 124 can be omitted from the structure of the control device 102.

[0168] Alternatively, it may further include: a first position acquisition unit 124 that acquires the position of the insertion member 92 in the insertion direction, and a determination unit 120 that determines whether the insertion member 92 is inserted based on the position of the insertion member 92 acquired by the first position acquisition unit 124. Thus, it is possible to easily grasp that the insertion member 92 has reached a predetermined insertion determination position.

[0169] Alternatively, after the blanking pin 86 is pushed out, the insertion member control unit 116 pulls out the insertion member 92 from the gap 80, and after the start of pulling out the insertion member 92, the mold opening / closing unit 114 opens the mold 16 by moving the movable mold 64 away from the fixed mold 62. Thus, the molded product can be taken out from the mold 16.

[0170] Alternatively, the injection molding machine 10 may further include: an ejector pin 88 for ejecting and taking out the molded product from the mold 16. After the start of pulling out the insertion member 92, the determination unit 120 further determines whether the insertion member 92 has been pulled out from the gap 80, and the ejection control unit 122 ejects the ejector pin 88 when it is determined that the insertion member 92 has been pulled out from the gap 80, thereby taking out the molded product from the mold 16. Thus, the molded product can be easily taken out.

[0171] Alternatively, the insertion member control unit 116 pulls out the insertion member 92 from the gap 80 at a second speed, and after the start of pulling out the insertion member 92, the determination unit 120 determines whether the insertion member 92 has been pulled out based on whether a second predetermined time has elapsed. Thus, the second position acquisition unit 126 can be omitted from the structure of the control device 102.

[0172] Alternatively, it may further include: a second position acquisition unit 126 that acquires the position of the insertion member 92 in the pulling-out direction, and a determination unit 120 that determines whether the insertion member 92 has been pulled out based on the position of the insertion member 92 acquired by the second position acquisition unit 126. Thus, it is possible to easily grasp that the insertion member 92 has reached a predetermined pulling-out determination position.

[0173] Alternatively, the injection molding machine 10 may further include: a cutter 90 for cutting the gate of the mold 16. When it is determined that the insertion member 92 has been inserted into the gap 80, the ejection control unit 122 cuts the gate by pushing out the cutter 90 together with the blanking pin 86. Thus, gate cutting can be performed efficiently.

[0174] Alternatively, the fixed metal mold 62 may further include: an insert kit 70 inserted through the first insert kit hole 68. The insertion member 92 is a plate-like member having a second insert kit hole 96 that allows the blanking pin 86 to extrude a part r of the insert kit 70 and the resin R toward the mounting plate 36. The insertion member control unit 116 inserts the insertion member 92 into the gap 80, so that the first insert kit hole 68 of the fixed metal mold 62 and the second insert kit hole 96 of the insertion member 92 are adjacent to each other in the pushing direction of the blanking pin 86. Thus, even if there is no gap 80 between the fixed metal mold 62 and the insertion member 92 in the opening and closing direction, the insert kit 70 can move within the second insert kit hole 96 during the blanking process, so that the blanking process can be performed.

[0175] <Second Invention>

[0176] A control method for an injection molding machine 10 having a mold 16, the mold 16 having a fixed metal mold 62 provided with a first insert kit hole 68 and a movable metal mold 64 that forms a cavity 76 together with the fixed metal mold 62, and opening and closing by separating and contacting the fixed metal mold 62 and the movable metal mold 64 with each other. The injection molding machine 10 includes: a movable platen 28 that supports the movable metal mold 64 and separates and contacts the movable metal mold 64 from the fixed metal mold 62 by moving along the opening and closing direction of the mold 16; a fixed platen 32 that supports the fixed metal mold 62; a mold closing locator 74 that connects the fixed metal mold 62 and the movable metal mold 64 when the movable platen 28 moves in the closing direction of the mold 16 and releases the connection when the mold 16 is opened; a mounting plate 36 that mounts the fixed metal mold 62 on the fixed platen 32; a blanking pin 86 that is pushed out in such a way as to blank a part r of the resin R in the cavity 76 toward the mounting plate 36 through the first insert kit hole 68 in order to form a molded product having at least one of a hole and a notch; and an insertion member 92 that is inserted between the fixed metal mold 62 and the mounting plate 36. The control method includes: a gap opening step of moving the fixed metal mold 62 and the movable metal mold 64 integrally in the opening direction of the mold 16 from the state where the mold 16 is closed, thereby creating a gap 80 between the fixed metal mold 62 and the mounting plate 36; an insertion control step of inserting the insertion member 92 into the gap 80; an insertion determination step of determining whether the insertion member 92 has been inserted into the gap 80; and a blanking step of pushing out the blanking pin 86 when it is determined that the insertion member 92 has been inserted into the gap 80.

[0177] Accordingly, a control method for an injection molding machine 10 that performs a blanking process with good reliability is provided.

Claims

1. A control device (102) for an injection molding machine (10) having a metal mold (16), the metal mold (16) having a stationary metal mold (62) provided with a first insert hole (68) and a movable metal mold (64) that forms a cavity (76) together with the stationary metal mold, and being opened and closed by separating and contacting the stationary metal mold and the movable metal mold with each other, characterized in that: The injection molding machine includes: A movable platen (28) that supports the movable metal mold and separates and contacts the movable metal mold from the stationary metal mold by moving in the opening and closing direction of the metal mold; A stationary platen (32) that supports the stationary metal mold; A mold closing locator (74) that connects the stationary metal mold and the movable metal mold when the movable platen moves in the closing direction of the metal mold and releases the connection when the metal mold is opened; A mounting plate (36) that mounts the stationary metal mold on the stationary platen; A blanking pin (86) that is pushed out in such a way as to blank a part (r) of the resin (R) in the cavity toward the mounting plate side through the first insert hole in order to form a molded product having at least one of a hole and a notch; and An insertion member (92) that is inserted between the stationary metal mold and the mounting plate, The control device includes: A mold opening and closing unit (114) that moves the stationary metal mold and the movable metal mold integrally in the opening direction of the metal mold from the state where the metal mold is closed, thereby creating a gap (80) between the stationary metal mold and the mounting plate; An insertion member control unit (116) that inserts the insertion member into the gap; A determination unit (120) that determines whether the insertion member is inserted into the gap; and A push-out control unit (122) that pushes out the blanking pin when it is determined that the insertion member is inserted into the gap, After the blanking pin is pushed out, the insertion member control unit pulls out the insertion member from the gap.

2. The control device for an injection molding machine according to claim 1, characterized in that: The insertion member control unit inserts the insertion member into the gap at a first speed, After the start of insertion of the insertion member, the determination unit determines whether the insertion member is inserted based on whether a first predetermined time has elapsed.

3. The control device for an injection molding machine according to claim 1, characterized in that: The control device further includes: a first position acquisition unit (124) that acquires the position of the insertion member in the insertion direction, The determination unit determines whether the insertion member is inserted based on the position of the insertion member acquired by the first position acquisition unit.

4. The control device for an injection molding machine according to any one of claims 1 to 3, characterized in that: After the start of pulling out of the insertion member, the mold opening and closing unit opens the metal mold by moving the movable metal mold away from the stationary metal mold.

5. The control device of an injection molding machine according to claim 4, wherein: The injection molding machine further includes: an ejector pin (88) for ejecting and removing the molded product from the mold; After the start of pulling out of the insertion member, the determination unit further determines whether the insertion member is pulled out from the gap; The ejecting control unit ejects the ejector pin when it is determined that the insertion member has been pulled out from the gap, thereby removing the molded product from the mold.

6. The control device of an injection molding machine according to claim 5, wherein: The insertion member control unit pulls out the insertion member from the gap at a second speed; After the start of pulling out of the insertion member, the determination unit determines whether the insertion member has been pulled out based on whether a second predetermined time has elapsed.

7. The control device of an injection molding machine according to claim 5, wherein: The control device further includes: a second position acquisition unit (126) for acquiring the position of the insertion member in the pulling-out direction; The determination unit determines whether the insertion member has been pulled out based on the position of the insertion member acquired by the second position acquisition unit.

8. The control device of an injection molding machine according to any one of claims 1 to 3, wherein: The injection molding machine further includes: a cutter (90) for cutting the gate of the mold; When it is determined that the insertion member is inserted into the gap, the ejecting control unit cuts the gate by pushing out the cutter together with the blanking pin.

9. The control device of an injection molding machine according to any one of claims 1 to 3, wherein: The stationary mold further includes: an insert sleeve (70) inserted through the first insert sleeve hole; The insertion member is a plate-like member having a second insert sleeve hole (96) that allows a part of the insert sleeve and the resin to be extruded toward the mounting plate side by the blanking pin; The insertion member control unit makes the first insert sleeve hole of the stationary mold adjacent to the second insert sleeve hole of the insertion member in the pushing-out direction of the blanking pin by inserting the insertion member into the gap.

10. A control method of an injection molding machine (10) having a mold (16), the mold (16) having a stationary mold (62) provided with a first insert sleeve hole (68) and a movable mold (64) that forms a cavity (76) together with the stationary mold, and opening and closing by separating and contacting the stationary mold and the movable mold with each other, wherein: The injection molding machine includes: A movable platen (28) that supports the movable mold and separates and contacts the movable mold from the stationary mold by moving in the opening and closing direction of the mold; A stationary platen (32) that supports the stationary mold; A mold clamping locator (74) that connects the fixed mold and the movable mold when the movable platen moves in the closing direction of the mold, and disconnects the connection when the mold is opened; A mounting plate (36) that mounts the fixed mold on the fixed platen; A blanking pin (86) that is pushed out in such a way as to blank a part (r) of the resin (R) in the cavity toward the mounting plate side via the first insert kit hole in order to form a molded product having at least one of a hole and a notch; and An insertion member (92) that is inserted between the fixed mold and the mounting plate, The control method includes: A gap opening step of moving the fixed mold and the movable mold integrally in the opening direction of the mold from the state where the mold is closed, thereby creating a gap between the fixed mold and the mounting plate; An insertion control step of inserting the insertion member into the gap; An insertion determination step of determining whether the insertion member has been inserted into the gap; And A blanking step of pushing out the blanking pin when it is determined that the insertion member has been inserted into the gap.

Images