JP2004249637A - Automated clamping force regulating equipment for molding machine - Google Patents

Automated clamping force regulating equipment for molding machine Download PDF

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Publication number
JP2004249637A
JP2004249637A JP2003043718A JP2003043718A JP2004249637A JP 2004249637 A JP2004249637 A JP 2004249637A JP 2003043718 A JP2003043718 A JP 2003043718A JP 2003043718 A JP2003043718 A JP 2003043718A JP 2004249637 A JP2004249637 A JP 2004249637A
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JP
Japan
Prior art keywords
mold
clamping
mold clamping
toggle
clamping force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003043718A
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Japanese (ja)
Inventor
Motofumi Suzuki
基文 鈴木
Original Assignee
Sumitomo Heavy Ind Ltd
住友重機械工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Sumitomo Heavy Ind Ltd, 住友重機械工業株式会社 filed Critical Sumitomo Heavy Ind Ltd
Priority to JP2003043718A priority Critical patent/JP2004249637A/en
Publication of JP2004249637A publication Critical patent/JP2004249637A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/1751Adjustment means allowing the use of moulds of different thicknesses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7653Measuring, controlling or regulating mould clamping forces

Abstract

<P>PROBLEM TO BE SOLVED: To make a clamping device move automatically to a position where a prescribed clamping force is generated, by driving a mold thickness motor and a clamping motor in the case when mold equipment is replaced, and to conduct regulation so that the clamping device may generate the prescribed clamping force easily and in a short time even when the mold equipment is replaced with that different in thickness. <P>SOLUTION: This automated clamping force regulating equipment has a driving source for clamping position regulation which moves a toggle type clamping device supporting device, a driving source for clamping which moves a movable mold supporting device with respect to the toggle type clamping device supporting device by a toggle type clamping device, a clamping position sensor for controlling the position of the toggle type clamping device supporting device, a mold opening-closing position sensor for controlling the position of the movable mold supporting device, a mold thickness regulation control device which controls the operation of the driving source for clamping position regulation, and a clamping force regulation control device which controls the operation of the driving source for clamping. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an automatic mold clamping force adjusting device for a molding machine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a molding machine such as an injection molding machine, a resin heated and melted in a heating cylinder is injected at a high pressure to fill a cavity space of a mold apparatus, and the resin is filled in the cavity space. The molded article is formed by cooling and solidifying.
[0003]
For this purpose, the mold apparatus is composed of a fixed mold and a movable mold, and the movable mold is moved forward and backward by a mold clamping device, and is brought into and out of contact with the fixed mold, thereby closing the mold, clamping and closing the mold. The mold can be opened. The mold clamping device includes a fixed platen to which a fixed mold is attached, a movable platen to which a movable mold is attached, and a toggle mechanism for moving the movable platen forward and backward, and operates the toggle mechanism. By moving the movable platen forward and backward, mold closing, mold closing and mold opening of the mold apparatus are performed (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2002-337184
[0005]
[Problems to be solved by the invention]
However, in the conventional molding machine, when the mold device is replaced with one having a different thickness, the toggle mechanism is almost fully extended in order to adjust the mold clamping force by the mold clamping device to be appropriate. In this case, the mold thickness motor is driven to move the movable platen by an adjustment distance corresponding to the difference in the thickness of the mold device, so that it takes time to replace the mold device.
[0006]
A toggle mechanism widely used as a booster in a mold clamping device of a molding machine changes a force generated by a link angle, that is, a mold clamping force. Therefore, even when the mold device is replaced with one having a different thickness, the link angle in the mold closed state of the mold device needs to be a predetermined angle so as to generate a predetermined mold clamping force. . However, in order to adjust the link angle of the mold device in the mold closed state to a predetermined angle, the toggle mechanism is mounted so that the position of the movable platen corresponds to the mold closed state of the mold device. By driving the mold thickness motor that moves the base plate along the tie bar and moving the entire mold clamping driving device, the mold clamping motor that operates the toggle mechanism is driven so that the link angle becomes a predetermined angle. It takes a long time to do this.
[0007]
Therefore, when the mold device is replaced, the mold thickness motor is driven in a state where the link angle of the toggle mechanism is maintained in the mold closed state of the mold device before replacement, that is, the toggle mechanism is almost fully extended. The entire tightening drive is retracted. In this case, the mold apparatus before replacement is detached from the movable platen, and is attached to the fixed platen with the mold closed. Then, after the mold device after replacement is attached to the fixed platen instead of the mold device before replacement, the mold thickness motor is driven without driving the mold clamping motor, and the toggle mechanism and the movable platen are driven. The entire mold clamping device including is moved forward. At this time, by moving the entire mold clamping device forward or backward by an adjustment distance corresponding to the difference in thickness of the mold device before and after replacement, even when the mold device is replaced with one having a different thickness, The mold clamping force by the clamping device is made appropriate.
[0008]
However, in the conventional molding machine, the adjustment distance corresponding to the difference in the thickness of the mold device is grasped visually or measured using a measure. In addition, the amount of drive of the mold thickness motor for moving by the adjustment distance is manually set, or the mold thickness motor is manually operated while visually observing that the movable platen moves by the adjustment distance. Has become. Therefore, it takes time to replace the mold device.
[0009]
The present invention solves the above-mentioned conventional problems, and when the mold device is replaced, the mold thickness motor and the mold clamping motor are driven to automatically move the mold clamping device to a position where a predetermined mold clamping force is generated. Even if the mold device is replaced with one having a different thickness, it is easily and quickly adjusted so that the mold clamping device generates a predetermined clamping force. It is an object of the present invention to provide an automatic mold-clamping-force adjusting device for a molding machine that can perform the method.
[0010]
[Means for Solving the Problems]
Therefore, in the automatic mold clamping force adjusting device for a molding machine according to the present invention, a driving source for mold clamping position adjustment for moving the toggle mold clamping device support device with respect to a tie bar having one end fixed to the fixed mold support device. A mold clamping drive source for moving a movable mold supporting device with respect to the toggle-type clamping device support device by the toggle-type clamping device, and a mold for controlling a position of the toggle-type clamping device supporting device. A closing position sensor, a mold opening / closing position sensor for controlling the position of the movable mold supporting device, and an operation of the mold clamping position adjusting drive source based on a detection signal of the mold closing position sensor or the mold opening / closing position sensor. A mold thickness adjustment control device for controlling the operation of the mold clamping drive source based on a detection signal of the mold opening / closing position sensor, and the movable device after the mold device is replaced. Mold support device closed There, and the toggle type mold clamping device to a state that generates a predetermined clamping force.
[0011]
In another automatic mold clamping force adjusting device for a molding machine according to the present invention, when the movable mold supporting device advances from a mold closing position to a mold clamping completion position, the toggle mold clamping device has a link angle. It becomes a predetermined value and generates a predetermined mold clamping force.
[0012]
In still another automatic mold clamping force adjusting device for a molding machine of the present invention, the mold thickness adjustment control device and the mold clamping force adjustment control device further include a mold clamping position adjustment drive source and a mold clamping drive source. After the operation is controlled and the approximate position adjustment is performed, fine position adjustment is performed.
[0013]
In still another automatic mold clamping force adjusting device for a molding machine of the present invention, the mold thickness adjustment control device and the mold clamping force adjustment control device further include a mold clamping position adjustment drive source and a mold clamping drive source. By controlling the operation, the approximate position adjustment and the fine position adjustment are performed simultaneously.
[0014]
In still another automatic mold clamping force adjusting device for a molding machine of the present invention, the mold clamping position when the mold device after replacement is attached to the fixed mold supporting device and the movable mold supporting device. An operation amount of the mold clamping position adjusting drive source and the mold clamping drive source is calculated based on detection signals of the sensor and the mold opening / closing position sensor.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The automatic mold clamping force adjusting device for a molding machine in the present invention can be applied to various molding machines such as an extrusion molding device, a laminator, a transfer molding device, a die cast machine, and an IJ sealing press. In this embodiment, a case where the present invention is applied to an injection molding machine will be described for convenience of explanation.
[0016]
FIG. 1 is a schematic view of a mold clamping device of an injection molding machine according to a first embodiment of the present invention.
[0017]
In the figure, reference numeral 10 denotes a mold clamping device of an injection molding machine. 17 is a frame, 12 is a fixed platen as a fixed mold supporting device fixed to the frame 17, and 15 is movable with respect to the frame 17 at a predetermined distance from the fixed platen 12. Is a toggle support as a base plate disposed in. The toggle support 15 functions as a toggle-type clamping device supporting device. A tie bar 16 is provided between the fixed platen 12 and the toggle support 15 as a plurality, for example, four guide means.
[0018]
Reference numeral 13 denotes a movable platen as a movable mold supporting device which is disposed so as to face the fixed platen 12 and is provided so as to be able to advance and retreat (move in the horizontal direction in the figure) along the tie bar 16. Reference numeral 11 denotes a mold device, which includes a fixed mold 11a and a movable mold 11b. A fixed mold 11a is mounted on a mold mounting surface of the fixed platen 12 facing the movable platen 13, and a movable mold 11b is mounted on a mold mounting surface of the movable platen 13 facing the fixed platen 12. Is attached.
[0019]
A drive device (not shown) for moving an ejector pin may be attached to the rear end (left end in the figure) of the movable platen 13.
[0020]
A toggle mechanism 20 as a toggle-type mold clamping device is attached between the movable platen 13 and the toggle support 15, and a mold clamping drive for operating the toggle mechanism 20 is provided at a rear end of the toggle support 15. A mold clamping motor 26 is provided as a source. The mold clamping motor 26 is provided with a movement direction conversion device (not shown) including a ball screw mechanism or the like for converting a rotational movement into a reciprocating movement, and causes the drive shaft 25 to advance and retreat (move in the left-right direction in the figure) to toggle. The mechanism 20 can be activated. The mold clamping motor 26 is preferably a servomotor, and includes a mold opening / closing position sensor 27 as an encoder for detecting the number of rotations.
[0021]
Here, the toggle mechanism 20 is swingably attached to the crosshead 24 attached to the drive shaft 25, a second toggle lever 23 swingably attached to the crosshead 24, and the toggle support 15. A first toggle lever 21 and a toggle arm 22 swingably attached to the movable platen 13. The link between the first toggle lever 21 and the second toggle lever 23 and the link between the first toggle lever 21 and the toggle arm 22 are respectively linked. The toggle mechanism 20 is a so-called inner winding five-node double toggle mechanism, and has a vertically symmetric configuration.
[0022]
The toggle mechanism 20 can be operated by driving the mold clamping motor 26 to move the crosshead 24 as a driven member forward and backward. In this case, when the crosshead 24 is moved forward (moves rightward in the figure), the movable platen 13 is moved forward to close the mold. Then, a mold clamping force is generated by multiplying the propulsive force by the mold clamping motor 26 by the toggle magnification, and mold clamping is performed by the mold clamping force.
[0023]
A mold clamping position adjusting device 35 is disposed at the rear end (left end in the figure) of the toggle support 15 in order to adjust the position of the toggle support 15 with respect to the fixed platen 12. Here, a plurality of, for example, four tie bar insertion holes (not shown) are formed in the toggle support 15, and the left end of the tie bar 16 in the figure is inserted into each of the tie bar insertion holes. The right end (not shown) of the tie bar 16 is fixed to the fixed platen 12 by a fixing nut 16a.
[0024]
The tie bar 16 has a threaded portion 36 having a thread formed on the outer periphery at the left end in the figure, and the adjusting nut 37 is screwed (threaded) into the threaded portion 36 of each tie bar 16. The adjusting nut 37 is attached to the rear end of the toggle support 15 so as to be rotatable and immovable in the axial direction of the tie bar 16. A driven gear 37a is attached to the outer periphery of the adjusting nut 37.
[0025]
Further, a mold thickness motor 31 as a mold clamping position adjusting drive source is disposed above the rear end of the toggle support 15. A drive gear 33 is attached to the rotation shaft of the mold thickness motor 31. Here, a driving linear body 34 such as a chain or a toothed belt is wound around the driven gear 37 a of the adjusting nut 37 and the driving gear 33. Therefore, when the mold thickness motor 31 is driven to rotate the driving gear 33, the adjustment nuts 37 screwed to the screw portions 36 of the respective tie bars 16 are synchronously rotated. Thereby, the mold thickness motor 31 is rotated by a predetermined number of rotations in a predetermined direction, and the toggle support 15 can be moved forward and backward by a predetermined distance. The mold thickness motor 31 is desirably a servomotor, and includes a mold clamping position sensor 32 as an encoder for detecting the number of rotations.
[0026]
Means for transmitting the rotation of the mold thickness motor 31 to the adjustment nut 37 is not limited as long as the adjustment nut 37 screwed to the screw portion 36 of each tie bar 16 can be rotated synchronously. For example, instead of the driving linear body 34, a large-diameter gear meshing with (engaging) all of the driving gear 33 and the driving gear 33 is rotated around the rear end of the toggle support 15. They can be arranged as much as possible.
[0027]
Next, operation characteristics of the toggle mechanism 20 will be described.
[0028]
FIG. 2 is an enlarged view of a main part of the toggle mechanism according to the first embodiment of the present invention, and FIG. 3 is a view showing a relationship between a position of a crosshead and a link angle of the toggle mechanism according to the first embodiment of the present invention. FIG. 4 is a diagram showing the relationship between the position of the crosshead of the toggle mechanism and the mold clamping force according to the first embodiment of the present invention. In FIG. 3, the horizontal axis indicates the position of the crosshead, and the vertical axis indicates the link angle. In FIG. 4, the horizontal axis indicates the position of the crosshead, and the vertical axis indicates the mold clamping force.
[0029]
When closing the mold in the mold clamping device 10, when the mold clamping motor 26 is driven, the crosshead 24 moves forward, as shown in FIG. 2, along the center axis A of the toggle mechanism 20 in the direction indicated by the arrow B. Moving. At this time, the link angle θ as an angle between the longitudinal center axis C of the toggle arm 22 and the longitudinal center axis D of the first toggle lever 21 decreases as the crosshead 24 advances.
[0030]
In this case, the position of the crosshead 24 and the link angle θ change as shown by a curve E shown in FIG. In FIG. 3, the position of the crosshead 24 is a position with respect to the toggle support 15, and the most retracted position (the position moved to the left in FIG. 1) is set to 0 (zero), and the numerical value increases as the position advances. It is increasing. A position indicated by a line F indicates a mold clamping completion position as a position of the crosshead 24 corresponding to a state where the mold clamping of the mold apparatus 10 is completed. When the crosshead 24 is at the mold clamping completion position, the movable platen 13 is also at the mold clamping completion position. When the crosshead 24 is at the mold clamping completion position, the toggle mechanism 20 is in a substantially extended state, and the toggle arm 22 and the first toggle lever 21 are substantially linear. However, microscopically, when the position of the crosshead 24 is at the mold clamping completion position, the link angle θ is a nicking amount as an angle indicated by β. That is, in a state where the mold clamping of the mold apparatus 10 is completed, the toggle arm 22 and the first toggle lever 21 are not completely linear, but are slightly inclined by the nicking amount β.
[0031]
In FIG. 3, a position indicated by a line G indicates a mold closing position as a position of the crosshead 24 corresponding to a mold closed state of the mold apparatus 10. When the crosshead 24 is at the mold closing position, the movable platen 13 is also at the mold closing position. And, α is the crosshead mold clamping process distance as the difference between the mold clamping completion position and the mold closing position. The cross head mold clamping process distance α is changed according to the mold clamping force generated by the toggle mechanism 20. Therefore, the mold closing position is also changed according to the mold clamping force.
[0032]
Since the relationship between the position of the crosshead 24 and the position of the movable platen 13 to which the movable mold 11b is attached is known in advance based on the characteristics of the toggle mechanism 20, the position of the crosshead 24 is Based on this, the position of the mold mating surface (parting surface) of the movable mold 11b can also be grasped. Therefore, the relationship between the position of the mold mating surface of the movable mold 11b and the link angle θ can be grasped based on the characteristic indicated by the curve E in FIG.
[0033]
Further, the position of the cross head 24 and the mold clamping force generated by the toggle mechanism 20 change as shown by a curve H in FIG. In FIG. 4, as in FIG. 3, the value of the position of the crosshead 24 increases as it advances. Further, the position indicated by the line I indicates the mold clamping completion position as the position of the crosshead 24 corresponding to the state where the mold clamping of the mold apparatus 10 is completed. The position of the crosshead 24 shown in FIG. 4 is an enlarged view of the vicinity of the mold clamping completion position. Further, the mold clamping force changes according to the crosshead mold clamping process distance α from the mold closing of the mold apparatus 10 to the completion of the mold clamping, and a curve H shown in FIG. 4 shows a qualitative change. Things.
[0034]
Since the position of the mold mating surface of the movable mold 11b can be determined based on the position of the cross head 24, the mold of the movable mold 11b is determined based on the characteristic indicated by the curve H in FIG. It is also possible to grasp the relationship between the position of the mating surface and the mold clamping force.
[0035]
By the way, similarly to the mold clamping device using the general toggle mechanism, in the present embodiment, the mold clamping force generated by the toggle mechanism 20 is the entire mold clamping device 10 including the fixed platen 12, the toggle support 15, and the tie bar 16. , Ie, the mold clamping stiffness changes as a proportional constant. In the mold clamping device 10, the stiffness of the tie bar 16 is lower than that of other members, so that the stiffness of the tie bar 16 can be considered to be equal to the stiffness of the tie bar 16. Accordingly, in the present embodiment, the mold clamping force generated by the toggle mechanism 20 is such that the toggle support 15 is fixed from the mold closing of the mold apparatus 10 to the completion of mold clamping, using the spring constant as the rigidity of the tie bar 16 as a proportional constant. It can be said that it changes in proportion to the amount of movement with respect to the platen 12. That is, since the rigidity of the members such as the fixed platen 12 and the toggle support 15 is sufficiently high, the mold clamping force generated by the mold clamping device 10 is substantially generated by the four tie bars 16 being elastically deformed and elongated. However, it can be said that it is proportional to the amount of elongation of the tie bar 16. Further, the extension amount of the tie bar 16 is substantially equal to the platen mold clamping process distance as the moving amount of the movable platen 13 corresponding to the crosshead mold clamping process distance α.
[0036]
Note that the link angle θ in a state where the mold clamping of the mold device 10 is completed is constant even if the mold clamping force generated by the toggle mechanism 20 changes. Therefore, the mold clamping completion position of the crosshead 24 with respect to the toggle support 15 is constant even if the mold clamping force generated by the toggle mechanism 20 changes.
[0037]
Next, an automatic mold clamping force adjusting device for a molding machine that controls the operation of the mold clamping device 10 will be described.
[0038]
FIG. 5 is a view showing a configuration of an automatic mold clamping force adjusting device for a molding machine according to the first embodiment of the present invention.
[0039]
In FIG. 5, reference numeral 41 denotes a mold thickness adjustment control device which stores a preset mold thickness target value 42 in a storage means, and detects a detection signal of the mold opening / closing position sensor 27, a detection signal of the mold clamping position sensor 32 and the mold thickness. The operation of the mold thickness motor 31 is controlled based on the target thickness value 42. The mold thickness target value 42 is a target value of the position of the mold mating surface of the movable mold 11b at the time of completion of mold clamping corresponding to a change in the thickness of the mold apparatus 11 (the dimension in the horizontal direction in FIG. 1). It is. Reference numeral 43 denotes a mold clamping force adjustment control device which stores a preset mold clamping force target value 44 in a storage means, and based on the detection signal of the mold opening / closing sensor 27 and the mold clamping force target value 44, The operation of the tightening motor 26 is controlled. Here, the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43 include arithmetic means such as a CPU and an MPU; storage means such as a magnetic disk and a semiconductor memory; display means such as a CRT and a liquid crystal display; It is a kind of computer provided with input means, a communication interface and the like, but may be any device. As the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43, general-purpose devices such as a personal computer, a server, and a workstation can be used. In addition, the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43 may be independently configured devices, or may be configured integrally with each other, It may be one of other control devices or a system built in a computer. In the present embodiment, it is assumed that the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43 are incorporated in an injection molding machine control device (not shown) for controlling the operation of the injection molding machine. In addition, the control device for the injection molding machine includes input means such as an operation panel, and the operator can manually operate the mold clamping device 10 by operating the input means as necessary. I have.
[0040]
Here, the mold opening / closing position sensor 27 directly detects the rotation speed of the mold clamping motor 26. However, the rotational movement of the mold clamping motor 26 is converted into a reciprocating movement of the drive shaft 25 by a movement direction converting device (not shown) including a ball screw mechanism or the like. A change in the position of the crosshead 24 attached to the drive shaft 25 can be detected. And, as described above, since the position of the movable platen 13 and the position of the mold mating surface of the movable mold 11b can be grasped based on the position of the crosshead 24, the mold opening / closing position sensor 27 Based on the detected rotation speed of the mold clamping motor 26, the position of the movable platen 13 with respect to the toggle support 15 and the position of the mold mating surface of the movable mold 11b can be detected.
[0041]
The mold clamping position sensor 32 directly detects the rotation speed of the mold thickness motor 31. However, since the rotational movement of the mold thickness motor 31 is converted into a reciprocating movement of the toggle support 15 by the adjusting nut 37 and the screw portion 36 of the tie bar 16, by detecting the rotational speed of the mold thickness motor 31, the fixed platen is detected. A change in the position of the toggle support 15 relative to the position 12 can be detected. And, as described above, the mold clamping completion position of the crosshead 24 with respect to the toggle support 15 is constant, and the position of the mold mating surface of the movable mold 11b is grasped based on the position of the crosshead 24. Therefore, the mold clamping position sensor 32 can detect the position of the mold mating surface of the movable mold 11b when mold clamping is completed, based on the detected rotation speed of the mold thickness motor 31.
[0042]
Then, the mold thickness adjustment control device 41 calculates a difference between the mold thickness target value 42 and the position of the mold mating surface of the movable mold 11b detected by the mold opening / closing position sensor 27, and calculates the difference and the mold clamping position sensor. The drive amount (the number of rotations) of the mold thickness motor 31 is determined based on the difference from the position of the mold mating surface of the movable mold 11b at the time of completion of mold clamping detected by 32, and the drive is performed by the drive amount. A command is transmitted to the thickness motor 31. Thereby, the toggle support 15 moves by an amount corresponding to a change in the thickness of the mold apparatus 11. Therefore, the position of the mold mating surface of the movable mold 11b when the mold clamping is completed changes according to the change in the thickness of the mold apparatus 11.
[0043]
Further, the mold clamping force adjustment control device 43 controls the mold clamping motor 26 based on the difference between the mold clamping force target value 44 and the position of the mold mating surface of the movable mold 11b detected by the mold opening / closing position sensor 27. The drive amount (the number of rotations) is determined, and a command is transmitted to the mold clamping motor 26 so as to drive by the drive amount. As a result, the toggle support 15 moves to the mold clamping completion position. Therefore, the position of the mold mating surface of the movable mold 11b is a position where a predetermined mold clamping force is generated.
[0044]
Next, the operation of the automatic mold clamping force adjusting device for a molding machine having the above configuration will be described. Here, the operation of the mold clamping apparatus 10 for exchanging the mold apparatus will be described.
[0045]
FIG. 6 is a first diagram showing an operation of replacing a mold device of the injection molding machine according to the first embodiment of the present invention, and FIG. 7 is a mold of the injection molding machine according to the first embodiment of the present invention. FIG. 8 is a second diagram showing the operation of replacing the device, FIG. 8 is a third diagram showing the operation of replacing the mold device of the injection molding machine according to the first embodiment of the present invention, and FIG. FIG. 4 is a fourth diagram illustrating an operation of replacing the mold device of the injection molding machine according to the first embodiment, and FIG. 10 is a diagram illustrating an operation of replacing the mold device of the injection molding machine according to the first embodiment of the present invention. It is a 5th figure.
[0046]
First, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to close the mold. In this case, the mold clamping motor 26 rotates by a predetermined number of revolutions to advance the crosshead 24 to a predetermined mold closing position. As a result, the movable platen 13 also advances to the predetermined mold closing position, so that the mold mating surface of the movable mold 11b comes into contact with the mold mating surface of the fixed mold 11a to perform mold closing.
[0047]
Subsequently, the operator manually attaches the coupling member 14 as shown in FIG. Here, the coupling member 14 is a member that couples and integrates the fixed mold 11a and the movable mold 11b in a mold closed state, and attaches the mold apparatus 11 to the mold clamping apparatus 10, It is attached to the side surface of the mold device 11 when it is removed from the fastening device 10. The connecting member 14 is removed during operation of the injection molding machine.
[0048]
Subsequently, the operator manually attaches the crane mounting bracket 47 as shown in FIG. 7 to the fixed die 11a or the movable die 11b, The tip of the linear body 48 such as a wire rope or a chain is engaged, and the weight of the mold apparatus 11 is supported by the crane. When the fixed die 11a or the movable die 11b is provided with a member for engaging the distal end of the linear body 48 in advance, it is not necessary to attach the crane mounting bracket 47.
[0049]
Subsequently, the operator manually removes the fixed mold 11a and the movable mold 11b from the fixed platen 12 and the movable platen 13, respectively, that is, removes the fixed mold 11a and the movable mold 11b and the fixed platen 12 from each other. Then, the engagement with the movable platen 13 is released. Then, the crane is operated, and the mold device 11 is lifted upward as shown by an arrow J in FIG. 7, taken out of the mold clamping device 10, and moved to a predetermined place such as a mold storage space.
[0050]
Subsequently, the operator operates the crane and lifts the replaced mold apparatus 11 ′ in which the tip of the linear body 48 is engaged with the crane mounting bracket 47 as shown by an arrow K in FIG. From the fixed platen 12 and the movable platen 13. It is assumed that the mold device 11 'after the replacement is thicker than the mold device 11 before the replacement.
[0051]
Subsequently, the operator operates the crane and manually adjusts the attitude of the mold apparatus 11 ′ so that the axis of the fixed mold 11 a ′ coincides with the axis of the fixed platen 12. Then, the operator manually attaches the fixed mold 11a 'to the fixed platen 12, that is, engages the fixed mold 11a' with the fixed platen 12.
[0052]
Subsequently, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to move the movable platen 13 forward. Then, the movable platen 13 is stopped at a position where the mold mounting surface of the movable platen 13 contacts the rear surface of the movable mold 11b '. The position is a mold closing position of the movable platen 13 in the mold device 11 'after the replacement. In this case, since the mold device 11 'after the replacement is thicker than the mold device 11 before the replacement, the toggle arm 22 and the first toggle lever 21 are large at the node as shown in FIG. It is inclined. That is, the link angle θ is larger than that shown in FIG.
[0053]
Subsequently, the operator manually engages the movable mold 11b 'with the movable platen 13. Then, the operator manually removes the distal end of the linear body 48 from the crane mounting bracket 47, removes the crane mounting bracket 47 from the fixed mold 11a 'or the movable mold 11b', and removes the coupling member 14 'from the mold. Remove from mold device 11 '.
[0054]
Subsequently, the operator operates the input means of the control device for the injection molding machine to activate the automatic mold clamping force adjusting device for the molding machine. In this case, a mold thickness adjustment as a rough position adjustment and a mold clamping force adjustment as a fine position adjustment are performed. First, the mold thickness adjustment is started, and the mold thickness adjustment control device 41 operates to detect the position of the crosshead 24 based on the detection signal of the mold opening / closing position sensor 27. In this case, since the toggle arm 22 and the first toggle lever 21 are greatly inclined at the node and the link angle θ is a large value, as can be seen from the curve E shown in FIG. It is in a position retracted from the completion position. Therefore, the mold thickness adjustment control device 41 operates the mold thickness motor 31 to retract the toggle support 15 so that the crosshead 24 can be moved to the mold clamping completion position.
[0055]
In this case, the mold thickness adjustment control device 41 determines the difference between the position of the movable platen 13 detected based on the detection signal of the mold opening / closing position sensor 27 and the position of the movable platen 13 corresponding to the mold clamping completion position of the crosshead 24. Then, the number of rotations of the mold thickness motor 31 required to retract the toggle support 15 by the mold clamping required distance as the distance corresponding to the above is calculated, and the mold thickness motor 31 is rotated by the number of rotations. As a result, the toggle support 15 retreats by the mold clamping required distance, so that the mold mating surface of the movable mold 11b 'is separated from the mold mating surface of the fixed mold 11a', and the mold of the movable mold 11b 'is made. A gap (gap) is generated between the mold mating surface and the mold mating surface of the fixed mold 11a 'by the required distance for mold clamping.
[0056]
Subsequently, the mold clamping force adjustment control device 43 operates to operate the mold clamping motor 26 based on the detection signal of the mold opening / closing position sensor 27 so that the position of the crosshead 24 becomes the mold clamping completion position. In this case, the mold clamping force adjustment control device 43 moves the crosshead 24 by a distance corresponding to the difference between the position of the crosshead 24 detected based on the detection signal of the mold opening / closing position sensor 27 and the mold clamping completion position. The number of rotations of the mold clamping motor 26 necessary for this is calculated, and the mold clamping motor 26 is rotated by the number of revolutions. Then, the movable platen 13 moves forward by the required mold clamping distance. Then, the mold mating surface of the movable mold 11b 'and the mold mating surface of the fixed mold 11a' come into contact with each other to perform mold closing. At this time, the toggle arm 22 and the first toggle lever 21 are not completely linear, but are slightly inclined by the nicking amount β. Thereby, the mold thickness adjustment as the approximate position adjustment is completed.
[0057]
Here, the mold is closed in a state where the crosshead 24 is at the mold clamping completion position. However, when performing the molding by operating the injection molding machine, the crosshead 24 is moved from the mold clamping completion position to the crosshead mold position. The mold is closed in a state where the mold is closed at a position retracted by the clamping step distance α. Therefore, it is necessary to finely adjust the position of the toggle support 15 so that the mold apparatus 11 'is closed while the crosshead 24 is at the closed position. Therefore, mold clamping force adjustment as fine position adjustment is performed.
[0058]
In this case, the mold thickness adjustment control device 41 calculates the number of rotations of the mold clamping motor 26 necessary for retreating the crosshead 24 by the crosshead mold clamping process distance α, and To rotate. The cross head mold clamping process distance α changes according to the mold clamping force generated by the mold clamping device 10 and is calculated in advance based on a desired mold clamping force. It is stored in storage means. As a result, the movable platen 13 is retracted by the platen mold clamping process distance as a moving amount corresponding to the crosshead mold clamping process distance α, and the mold mating surface of the movable mold 11b ′ and the mold of the fixed mold 11a ′. There is a gap between the mating surface and the platen clamping process distance.
[0059]
Subsequently, the mold thickness adjustment control device 41 calculates the number of rotations of the mold thickness motor 31 required to retract the toggle support 15 by the platen mold clamping process distance, and rotates the mold thickness motor 31 by the number of rotations. Let it. The platen mold clamping process distance is calculated in advance based on the crosshead mold clamping process distance α, and is stored in advance in the storage unit as the mold thickness target value 42. As a result, the toggle support 15 advances by the platen mold clamping process distance, so that the mold mating surface of the movable mold 11b 'comes into contact with the mold mating surface of the fixed mold 11a', as shown in FIG. Then, the mold is closed, and the mold clamping force adjustment is completed.
[0060]
When the adjustment of the mold clamping force is completed, the mold apparatus 11 'after the replacement is properly attached to the mold clamping apparatus 10, and the mold apparatus exchange of the mold clamping apparatus 10 is completed. Thus, the injection molding machine can be operated to perform molding using the mold device 11 'after the replacement.
[0061]
As described above, in the present embodiment, when the mold device 11 ′ after the replacement is attached to the mold device replacement of the mold clamping device 10, the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43 are toggled. The position of the support 15 is automatically adjusted to a position where a predetermined mold clamping force can be generated. Therefore, even when the mold device 11 is replaced with one having a different thickness, it is possible to easily and quickly adjust the toggle mechanism 20 to generate a predetermined mold clamping force.
[0062]
Further, since the encoder of the mold clamping motor 26 is used as the mold opening / closing position sensor 27 and the encoder of the mold thickness motor 31 is used as the mold clamping position sensor 32, the configuration of the automatic mold clamping force adjusting device for the molding machine is simplified. Cost can be reduced.
[0063]
In the present embodiment, when the mold thickness adjustment is completed, the toggle arm 22 and the first toggle lever 21 are not completely linear, but are inclined by the nicking amount β. However, the toggle arm 22 and the first toggle lever 21 may be linear. In this case, in the adjustment of the mold clamping force, the distance for retracting the crosshead 24 is extended by the moving distance of the crosshead 24 corresponding to the nicking amount β, and the distance for retracting the toggle support 15 is set to the nicking amount. It is necessary to extend the moving distance of the movable platen 13 corresponding to β.
[0064]
Further, in the present embodiment, in the mold thickness adjustment, after the mold thickness adjustment control device 41 performs the operation of retracting the toggle support 15 by the required mold clamping distance, the mold clamping force adjustment control device 43 controls the movable platen 13 to move. The operation of moving forward by the required mold clamping distance is performed. However, the operation of the mold thickness adjustment control device 41 for retracting the toggle support 15 by the required mold clamping distance and the operation of the mold clamping force adjustment control device 43 for moving the movable platen 13 forward by the required mold clamping distance are performed almost simultaneously. You can also In this case, it is desirable that the operation of retracting the toggle support 15 be performed slightly earlier than the operation of moving the movable platen 13 forward.
[0065]
Further, when the adjustment of the mold clamping force is completed, the mold clamping motor 26 is driven to perform mold clamping, and it can be verified whether or not a desired mold clamping force is generated. When the desired mold clamping force has not been generated, the mold clamping force adjustment can be immediately performed again.
[0066]
Next, a second embodiment of the present invention will be described. The description of the same structure and the same operation as those of the first embodiment is omitted. Here, the operation when the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement will be described.
[0067]
FIG. 11 is a first view showing an operation of exchanging a mold device of an injection molding machine according to a second embodiment of the present invention, and FIG. 12 is a mold of an injection molding machine according to a second embodiment of the present invention. FIG. 13 is a second diagram showing an operation of replacing a device, FIG. 13 is a third diagram showing an operation of replacing a mold device of an injection molding machine according to a second embodiment of the present invention, and FIG. FIG. 14 is a fourth diagram showing the operation of replacing the mold device of the injection molding machine according to the second embodiment, and FIG. 15 shows the operation of replacing the mold device of the injection molding machine according to the second embodiment of the present invention. It is a 5th figure.
[0068]
First, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to close the mold. In this case, the mold clamping motor 26 rotates by a predetermined number of revolutions to advance the crosshead 24 to a predetermined mold closing position. As a result, the movable platen 13 also advances to the predetermined mold closing position, so that the mold mating surface of the movable mold 11b comes into contact with the mold mating surface of the fixed mold 11a to perform mold closing.
[0069]
Subsequently, the operator manually attaches the coupling member 14 as shown in FIG.
[0070]
Subsequently, the operator manually attaches a crane mounting bracket 47 as shown in FIG. 12 to the fixed die 11a or the movable die 11b, The tip of the linear body 48 such as a wire rope or a chain is engaged, and the weight of the mold apparatus 11 is supported by the crane.
[0071]
Subsequently, the operator manually releases the fixed mold 11 a and the movable mold 11 b from the fixed platen 12 and the movable platen 13. Then, the crane is operated, and the mold apparatus 11 is lifted upward as shown by an arrow J in FIG. 12, taken out of the mold clamping apparatus 10, and moved to a predetermined place such as a mold storage area.
[0072]
Subsequently, the operator operates the crane and causes the crane mounting bracket 47 to engage the tip end of the linear body 48 with the replaced mold apparatus 11 ″ as shown by an arrow K in FIG. 13. It is suspended from above and carried between the fixed platen 12 and the movable platen 13. It is assumed that the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement.
[0073]
Subsequently, the operator operates the crane and manually adjusts the attitude of the mold apparatus 11 ″ so that the axis of the fixed mold 11 a ″ and the axis of the fixed platen 12 match. Then, the operator manually engages the fixed mold 11a ″ with the fixed platen 12.
[0074]
Subsequently, the operator operates the input means of the control device for the injection molding machine to activate the automatic mold clamping force adjusting device for the molding machine. First, the mold clamping force adjustment control device 43 is operated, and based on the detection signal of the mold opening / closing position sensor 27, the mold clamping motor 26 is operated so that the position of the crosshead 24 becomes the mold clamping completed position. In this case, the mold clamping force adjustment control device 43 moves the crosshead 24 by a distance corresponding to the difference between the position of the crosshead 24 detected based on the detection signal of the mold opening / closing position sensor 27 and the mold clamping completion position. The number of rotations of the mold clamping motor 26 necessary for this is calculated, and the mold clamping motor 26 is rotated by the number of revolutions. Then, the movable platen 13 also advances by a distance corresponding to the moving distance of the crosshead 24. As a result, the toggle arm 22 and the first toggle lever 21 are not completely linear, but are slightly inclined by the nicking amount β. That is, the link angle θ is an angle corresponding to the state where the mold clamping of the mold apparatus 10 is completed.
[0075]
In this case, the mold device 11 ″ after the exchange is thinner than the mold device 11 before the exchange, so that the movable mold 11b ″ and the movable platen 13 are located between the movable mold 11b ″ and the movable platen 13 as shown in FIG. There is a gap in the space. Therefore, the mold thickness adjustment control device 41 controls the mold thickness motor 31 to retract the toggle support 15 by a distance corresponding to the thickness difference between the mold device 11 ″ after the replacement and the mold device 11 before the replacement. To rotate. Since a load is applied to the mold thickness motor 31 at a position where the mold mounting surface of the movable platen 13 is in contact with the back surface of the movable mold 11b '', this is detected and the rotation of the mold thickness motor 31 is stopped. The platen 13 is stopped.
[0076]
Subsequently, the operator manually engages the movable mold 11b ″ with the movable platen 13. Then, the operator manually removes the distal end of the linear body 48 from the crane mounting bracket 47, removes the crane mounting bracket 47 from the fixed mold 11a ″ or the movable mold 11b ″, and connects the coupling member 14 ′. 'Is removed from the mold apparatus 11''. Thereby, the mold thickness adjustment is completed.
[0077]
Subsequently, mold clamping force adjustment as fine position adjustment is performed. In this case, the mold thickness adjustment control device 41 calculates the number of rotations of the mold clamping motor 26 necessary for retreating the crosshead 24 by the crosshead mold clamping process distance α, and To rotate. The cross head mold clamping process distance α changes according to the mold clamping force generated by the mold clamping device 10 and is calculated in advance based on a desired mold clamping force. It is stored in storage means. As a result, the movable platen 13 is retracted by a platen mold clamping process distance as a movement amount corresponding to the crosshead mold clamping process distance α, and the movable mold 11b '' A gap corresponding to the platen mold clamping process distance is formed between the mold and the mating surface.
[0078]
Subsequently, the mold thickness adjustment control device 41 calculates the number of rotations of the mold thickness motor 31 required to retract the toggle support 15 by the platen mold clamping process distance, and rotates the mold thickness motor 31 by the number of rotations. Let it. The platen mold clamping process distance is calculated in advance based on the crosshead mold clamping process distance α, and is stored in advance in the storage unit as the mold thickness target value 42. As a result, the toggle support 15 moves forward by the platen mold clamping process distance, and as shown in FIG. 15, the mold mating surface of the movable mold 11b ″ becomes the mold mating surface of the fixed mold 11a ″. , The mold is closed, and the adjustment of the mold clamping force is completed.
[0079]
When the adjustment of the mold clamping force is completed, the mold device 11 ″ after the replacement is properly attached to the mold clamp device 10, and the mold device exchange of the mold clamp device 10 is completed. Thus, the injection molding machine can be operated to perform molding using the mold device 11 ″ after the replacement.
[0080]
As described above, in the present embodiment, when the mold device of the mold clamping device 10 is replaced, the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement. When the mold device 11 '' after the replacement is attached, the mold thickness adjustment control device 41 and the mold clamping force adjustment control device 43 change the position of the toggle support 15 to a position where a predetermined mold clamping force can be generated. To adjust automatically. Therefore, even when the mold device 11 is replaced with one having a different thickness, it is possible to easily and quickly adjust the toggle mechanism 20 to generate a predetermined mold clamping force.
[0081]
In the present embodiment, when the mold thickness adjustment is completed, the toggle arm 22 and the first toggle lever 21 are not completely linear, but are inclined by the nicking amount β. However, the toggle arm 22 and the first toggle lever 21 may be linear. In this case, in the adjustment of the mold clamping force, the distance for retracting the crosshead 24 is extended by the moving distance of the crosshead 24 corresponding to the nicking amount β, and the distance for retracting the toggle support 15 is set to the nicking amount. It is necessary to extend the moving distance of the movable platen 13 corresponding to β.
[0082]
Further, when the adjustment of the mold clamping force is completed, the mold clamping motor 26 is driven to perform mold clamping, and it can be verified whether or not a desired mold clamping force is generated. When the desired mold clamping force has not been generated, the mold clamping force adjustment can be immediately performed again.
[0083]
Next, a third embodiment of the present invention will be described. The description of the same structures and operations as those of the first and second embodiments will be omitted. Here, a case will be described in which the mold apparatus 11 ′ ″ after the replacement is thicker than the mold apparatus 11 before the replacement, and the mold clamping force adjustment is also performed in the mold thickness adjustment.
[0084]
FIG. 16 is a first diagram showing an operation of exchanging a mold device of the injection molding machine according to the third embodiment of the present invention, and FIG. 17 is a mold of the injection molding machine according to the third embodiment of the present invention. FIG. 18 is a second diagram showing the operation of replacing the device, FIG. 18 is a third diagram showing the operation of replacing the mold device of the injection molding machine according to the third embodiment of the present invention, and FIG. FIG. 4 is a fourth diagram illustrating an operation of replacing the mold device of the injection molding machine according to the third embodiment, and FIG. 20 is a diagram illustrating an operation of replacing the mold device of the injection molding machine according to the third embodiment of the present invention. FIG. 5 and FIG. 21 are sixth views showing the operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
[0085]
First, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to close the mold. In this case, the mold clamping motor 26 rotates by a predetermined number of revolutions to advance the crosshead 24 to a predetermined mold closing position. As a result, the movable platen 13 also advances to the predetermined mold closing position, so that the mold mating surface of the movable mold 11b comes into contact with the mold mating surface of the fixed mold 11a to perform mold closing.
[0086]
Subsequently, the operator manually attaches the connecting member 14 as shown in FIG. 16 to the side surface of the mold apparatus 11.
[0087]
Subsequently, the operator manually attaches the crane mounting bracket 47 as shown in FIG. 17 to the fixed die 11a or the movable die 11b, The tip of the linear body 48 such as a wire rope or a chain is engaged, and the weight of the mold apparatus 11 is supported by the crane.
[0088]
Subsequently, the operator manually releases the fixed mold 11 a and the movable mold 11 b from the fixed platen 12 and the movable platen 13. Then, the crane is operated, and the mold device 11 is lifted upward, taken out of the mold clamping device 10 and moved to a predetermined place such as a mold storage space as indicated by an arrow J in FIG.
[0089]
Subsequently, the operator operates the crane to move the mold device 11 ′ ″ after the replacement, in which the tip of the linear body 48 is engaged with the crane mounting bracket 47, as shown by an arrow K in FIG. , And carried between the fixed platen 12 and the movable platen 13. It is assumed that the mold device 11 ′ ″ after the replacement is thicker than the mold device 11 before the replacement.
[0090]
Subsequently, the operator operates the crane and manually adjusts the attitude of the mold apparatus 11 ′ ″ so that the axis of the fixed mold 11 a ′ ″ coincides with the axis of the fixed platen 12. Let it. Then, the operator manually engages the fixed mold 11 a ′ ″ with the fixed platen 12.
[0091]
Subsequently, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to move the movable platen 13 forward. Then, the movable platen 13 is stopped at a position where the mold mounting surface of the movable platen 13 is in contact with the back surface of the movable mold 11b '''. This position is also the mold closing position of the movable platen 13 in the mold device 11 '''after the replacement. In this case, since the mold device 11 ″ ′ after the replacement is thicker than the mold device 11 before the replacement, the toggle arm 22 and the first toggle lever 21 are connected to each other as shown in FIG. At a large angle. That is, the link angle θ is larger than that shown in FIG.
[0092]
Subsequently, the operator manually engages the movable mold 11b ′ ″ with the movable platen 13. Then, the operator manually removes the distal end portion of the linear body 48 from the crane mounting bracket 47, removes the crane mounting bracket 47 from the fixed mold 11a '''or the movable mold 11b''', and 14 '''is removed from the mold apparatus 11'''.
[0093]
Subsequently, the operator operates the input means of the control device for the injection molding machine to activate the automatic mold clamping force adjusting device for the molding machine. In this case, the mold clamping force is also adjusted in the mold thickness adjustment. First, the mold thickness adjustment control device 41 operates to detect the position of the crosshead 24 based on the detection signal of the mold opening / closing position sensor 27. In this case, since the toggle arm 22 and the first toggle lever 21 are greatly inclined at the node and the link angle θ is a large value, as can be seen from the curve E shown in FIG. It is in a position retracted from the position. Therefore, the mold thickness adjustment control device 41 operates the mold thickness motor 31 to retract the toggle support 15 so that the crosshead 24 can be moved to the mold closed position.
[0094]
In this case, the mold thickness adjustment control device 41 calculates the difference between the position of the movable platen 13 detected based on the detection signal of the mold opening / closing position sensor 27 and the position of the movable platen 13 corresponding to the mold closing position of the crosshead 24. The number of rotations of the mold thickness motor 31 required to retract the toggle support 15 by the mold closing necessary distance as the corresponding distance is calculated. At this time, the mold clamping force adjustment control device 43 also operates, and as can be seen from the curve H shown in FIG. 4, the rotation speed of the mold thickness motor 31 is calculated in consideration of the mold clamping completion position, and the mold rotation is performed by the rotation speed. The thickness motor 31 is rotated. As a result, the toggle support 15 is retracted by the necessary distance for closing the mold, and as shown in FIG. 20, the mold mating surface of the movable mold 11b '''is set to the mold mating of the fixed mold 11a'''. A gap is formed between the mold mating surface of the movable mold 11b ″ ′ and the mold mating surface of the fixed mold 11a ′ ″ by the required mold closing distance.
[0095]
Subsequently, the mold clamping force adjustment control device 43 rotates the mold clamping motor 26, and as shown in FIG. 21, the mold mating surface of the movable mold 11b '''and the fixed mold 11a'''. Is rotated until it comes into contact with the mold mating surface. Thereby, the mold thickness adjustment and the mold clamping force adjustment are completed.
[0096]
Then, the mold device 11 ″ ′ after the replacement is properly attached to the mold clamping device 10, and the mold exchange of the mold clamping device 10 is completed. As a result, the injection molding machine is operated to perform molding using the mold apparatus 11 '''after the replacement.
[0097]
As described above, in the present embodiment, the mold thickness adjustment is also performed by the mold thickness adjustment controller 41 and the mold clamping force adjustment controller 43 in the mold thickness adjustment. Therefore, it is possible to adjust the mold clamping device 10 to generate a predetermined mold clamping force in a shorter time.
[0098]
Next, a fourth embodiment of the present invention will be described. The description of the same structure and operation as those of the first to third embodiments will be omitted. Here, an operation in which the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement, and the mold clamping force adjustment is performed in the mold thickness adjustment will be described. The description will be made with reference to FIGS. 11 to 15 in the second embodiment.
[0099]
First, the operator operates the input means of the control device for the injection molding machine to operate the mold clamping device 10 to close the mold. In this case, the mold clamping motor 26 rotates by a predetermined number of revolutions to advance the crosshead 24 to a predetermined mold closing position. As a result, the movable platen 13 also advances to the predetermined mold closing position, so that the mold mating surface of the movable mold 11b comes into contact with the mold mating surface of the fixed mold 11a to perform mold closing.
[0100]
Subsequently, the operator manually attaches the coupling member 14 as shown in FIG.
[0101]
Subsequently, the operator manually attaches a crane attachment 47 as shown in FIG. 11 to the fixed mold 11a or the movable mold 11b, and attaches a crane (not shown) such as an overhead traveling crane to the crane attachment 47. The tip of the linear body 48 such as a wire rope or a chain is engaged, and the weight of the mold apparatus 11 is supported by the crane.
[0102]
Subsequently, the operator manually releases the fixed mold 11 a and the movable mold 11 b from the fixed platen 12 and the movable platen 13. Then, the crane is operated, and the mold apparatus 11 is lifted upward as shown by an arrow J in FIG. 12, taken out of the mold clamping apparatus 10, and moved to a predetermined place such as a mold storage area.
[0103]
Subsequently, the operator operates the crane and causes the crane mounting bracket 47 to engage the tip end of the linear body 48 with the replaced mold apparatus 11 ″ as shown by an arrow K in FIG. 13. It is suspended from above and carried between the fixed platen 12 and the movable platen 13. It is assumed that the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement.
[0104]
Subsequently, the operator operates the crane and manually adjusts the attitude of the mold apparatus 11 ″ so that the axis of the fixed mold 11 a ″ and the axis of the fixed platen 12 match. Then, the operator manually engages the fixed mold 11a ″ with the fixed platen 12.
[0105]
Subsequently, the operator operates the input means of the control device for the injection molding machine to activate the automatic mold clamping force adjusting device for the molding machine. First, the mold clamping force adjustment control device 43 is operated, and considering the curve H shown in FIG. 4, based on the detection signal of the mold opening / closing position sensor 27, the position of the crosshead 24 is set to the mold clamping completion position. The tightening motor 26 is operated. In this case, the mold clamping force adjustment control device 43 moves the crosshead 24 by a distance corresponding to the difference between the position of the crosshead 24 detected based on the detection signal of the mold opening / closing position sensor 27 and the mold closing position. The rotation speed of the mold clamping motor 26 necessary for the rotation is calculated, and the mold clamping motor 26 is rotated by the rotation speed. Then, the movable platen 13 also advances by a distance corresponding to the moving distance of the crosshead 24. As a result, the toggle arm 22 and the first toggle lever 21 are not completely linear but slightly inclined. That is, the link angle θ is an angle corresponding to the state in which the mold apparatus 10 is closed.
[0106]
In this case, the mold device 11 ″ after the exchange is thinner than the mold device 11 before the exchange, so that the movable mold 11b ″ and the movable platen 13 are located between the movable mold 11b ″ and the movable platen 13 as shown in FIG. There is a gap in Then, the mold thickness adjustment control device 41 rotates the mold thickness motor 31 until the mold mounting surface of the movable platen 13 contacts the rear surface of the movable mold 11b ″.
[0107]
Subsequently, the operator manually engages the movable mold 11b ″ with the movable platen 13. Then, the operator manually removes the distal end portion of the linear body 48 from the crane mounting bracket 47, removes the crane mounting bracket 47 from the fixed mold 11a ″ or the movable mold 11b ″, and connects the coupling member 14 ′. 'Is removed from the mold apparatus 11''. Thereby, the mold thickness adjustment and the mold clamping force adjustment are completed.
[0108]
Then, the mold apparatus 11 ″ after the replacement is properly attached to the mold clamping apparatus 10, and the mold exchange of the mold clamping apparatus 10 is completed. Thus, the injection molding machine can be operated to perform molding using the mold device 11 ″ after the replacement.
[0109]
As described above, in the present embodiment, even if the mold device 11 ″ after the replacement is thinner than the mold device 11 before the replacement, the mold thickness adjustment control device 41 and the mold clamping force The adjustment control device 43 also performs mold clamping force adjustment in mold thickness adjustment. Therefore, it is possible to adjust the mold clamping device 10 to generate a predetermined mold clamping force in a shorter time.
[0110]
In the above embodiment, the horizontal type injection molding machine in which the movable platen moves in the horizontal direction (horizontal direction) has been described. However, the automatic mold clamping force adjusting device for a molding machine according to the present invention has It can also be applied to a vertical type injection molding machine that moves in the direction (vertical direction). Further, the automatic mold clamping force adjusting device for a molding machine of the present invention can be applied to a molding machine such as a die cast machine, an IJ sealing press and the like, in addition to an injection molding machine.
[0111]
In addition, the present invention is not limited to the above-described embodiment, and can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.
[0112]
【The invention's effect】
As described above in detail, according to the present invention, in an automatic mold clamping force adjusting device for a molding machine, a toggle-type mold clamping device supporting device is moved with respect to a tie bar having one end fixed to a fixed mold supporting device. A driving source for adjusting a clamping position to be adjusted, a driving source for clamping which moves a movable mold supporting device with respect to the supporting device for toggle type clamping device by the toggle type clamping device, and a supporting device for the toggle type clamping device. A mold clamping position sensor for controlling the position of the mold, a mold opening / closing position sensor for controlling the position of the movable mold support device, and the mold based on a detection signal of the mold clamping position sensor or the mold opening / closing position sensor. A mold thickness adjustment control device that controls the operation of the clamping position adjustment drive source, and a mold clamping force adjustment control device that controls the operation of the mold clamping drive source based on the detection signal of the mold opening / closing position sensor. The movable after the mold device exchange Mold supporting device is in the mold closing position, and the toggle type mold clamping device to a state that generates a predetermined clamping force.
[0113]
In this case, even if the mold device is replaced with one having a different thickness, it is possible to easily and quickly adjust the toggle-type mold clamping device to generate a predetermined mold clamping force. .
[0114]
In another automatic mold clamping force adjusting device for a molding machine, further, when the movable mold supporting device moves forward from the mold closing position to the mold clamping completion position, the toggle-type mold clamping device has a link angle of a predetermined value. , Generating a predetermined mold clamping force.
[0115]
In this case, the mold clamping force can be changed by adjusting the mold closing position of the movable mold supporting device with respect to the toggle-type mold clamping device supporting device.
[0116]
In still another automatic mold clamping force adjusting device for a molding machine, the mold thickness adjustment control device and the mold clamping force adjustment control device further control operations of the mold clamping position adjusting drive source and the mold clamping drive source. Then, after performing the approximate position adjustment, fine position adjustment is performed.
[0117]
In this case, strict position adjustment can be performed.
[0118]
In still another automatic mold clamping force adjusting device for a molding machine, the mold thickness adjustment control device and the mold clamping force adjustment control device further control operations of the mold clamping position adjusting drive source and the mold clamping drive source. Then, the approximate position adjustment and the fine position adjustment are simultaneously performed.
[0119]
In this case, the position adjustment can be performed in a shorter time.
[0120]
In another automatic mold clamping force adjusting device for a molding machine, the mold clamping position sensor and the mold opening and closing when the mold device after replacement is attached to the fixed mold supporting device and the movable mold supporting device. Based on the detection signal of the position sensor, an operation amount of the mold clamping position adjusting drive source and the mold clamping drive source is calculated.
[0121]
In this case, since the operator does not need to measure various dimensions and distances, the position can be accurately adjusted in a short time.
[Brief description of the drawings]
FIG. 1 is a schematic view of a mold clamping device of an injection molding machine according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of a toggle mechanism according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a relationship between a position of a crosshead of a toggle mechanism and a link angle according to the first embodiment of the present invention.
FIG. 4 is a diagram illustrating a relationship between a position of a crosshead of a toggle mechanism and a mold clamping force according to the first embodiment of the present invention.
FIG. 5 is a diagram showing a configuration of an automatic mold clamping force adjusting device for a molding machine according to the first embodiment of the present invention.
FIG. 6 is a first diagram illustrating an operation of exchanging a mold device of the injection molding machine according to the first embodiment of the present invention.
FIG. 7 is a second diagram illustrating an operation of exchanging the mold device of the injection molding machine according to the first embodiment of the present invention.
FIG. 8 is a third diagram showing an operation of replacing the mold device of the injection molding machine according to the first embodiment of the present invention.
FIG. 9 is a fourth diagram illustrating an operation of exchanging the mold device of the injection molding machine according to the first embodiment of the present invention.
FIG. 10 is a fifth diagram showing the operation of exchanging the mold device of the injection molding machine according to the first embodiment of the present invention.
FIG. 11 is a first diagram illustrating an operation of replacing a mold device of an injection molding machine according to a second embodiment of the present invention.
FIG. 12 is a second diagram illustrating an operation of exchanging the mold device of the injection molding machine according to the second embodiment of the present invention.
FIG. 13 is a third diagram showing an operation of exchanging the mold device of the injection molding machine according to the second embodiment of the present invention.
FIG. 14 is a fourth diagram illustrating the operation of exchanging the mold device of the injection molding machine according to the second embodiment of the present invention.
FIG. 15 is a fifth diagram showing the operation of exchanging the mold device of the injection molding machine according to the second embodiment of the present invention.
FIG. 16 is a first diagram illustrating an operation of replacing a mold device of an injection molding machine according to a third embodiment of the present invention.
FIG. 17 is a second diagram illustrating an operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
FIG. 18 is a third diagram illustrating an operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
FIG. 19 is a fourth diagram illustrating the operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
FIG. 20 is a fifth diagram showing the operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
FIG. 21 is a sixth diagram illustrating the operation of exchanging the mold device of the injection molding machine according to the third embodiment of the present invention.
[Explanation of symbols]
11, 11 ', 11 ", 11'" Mold device
12 Fixed platen
13 movable platen
15 Toggle support
16 Tie bar
20 toggle mechanism
26 Mold clamping motor
27 type open / close position sensor
31 type thickness motor
32 mold clamping position sensor
41 Mold thickness adjustment control device
43 Mold clamping force adjustment control device

Claims (5)

  1. (A) a mold-clamping position adjusting drive source for moving the toggle-type mold-clamping device support device with respect to a tie bar having one end fixed to the fixed mold-supporting device;
    (B) a mold-clamping drive source for moving the movable mold support device with respect to the toggle-type mold clamp device support device by the toggle mold clamp device;
    (C) a mold clamping position sensor for controlling the position of the toggle-type mold clamping device support device;
    (D) a mold opening / closing position sensor for controlling a position of the movable mold supporting device;
    (E) a mold thickness adjustment control device that controls the operation of the mold clamping position adjusting drive source based on a detection signal of the mold clamping position sensor or the mold opening / closing position sensor;
    (F) a mold clamping force adjustment control device that controls an operation of the mold clamping drive source based on a detection signal of the mold opening / closing position sensor,
    (G) The molding, wherein after the mold device is replaced, the movable mold supporting device is at the mold closing position and the toggle-type mold clamping device is in a state of generating a predetermined mold clamping force. Automatic clamping force adjusting device for machine.
  2. 2. The molding according to claim 1, wherein when the movable mold supporting device advances from the mold closing position to the mold clamping completion position, the toggle-type mold clamping device has a predetermined link angle and generates a predetermined mold clamping force. 3. Automatic clamping force adjusting device for machine.
  3. The mold thickness adjustment control device and the mold clamping force adjustment control device control the operations of the mold clamping position adjustment drive source and the mold clamping drive source, and perform fine position adjustment after performing approximate position adjustment. The automatic mold clamping force adjusting device for a molding machine according to claim 1.
  4. The mold thickness adjustment control device and the mold clamping force adjustment control device control the operations of the mold clamping position adjustment drive source and the mold clamping drive source to perform approximate position adjustment and fine position adjustment simultaneously. Item 3. The automatic mold clamping force adjusting device for a molding machine according to Item 1 or 2.
  5. The mold clamping position adjusting drive is performed based on detection signals of the mold clamping position sensor and the mold opening / closing position sensor when the mold device after replacement is attached to the fixed mold supporting device and the movable mold supporting device. The automatic mold clamping force adjusting device for a molding machine according to any one of claims 1 to 4, wherein an operation amount of the power source and the mold clamping drive source is calculated.
JP2003043718A 2003-02-21 2003-02-21 Automated clamping force regulating equipment for molding machine Pending JP2004249637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003043718A JP2004249637A (en) 2003-02-21 2003-02-21 Automated clamping force regulating equipment for molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003043718A JP2004249637A (en) 2003-02-21 2003-02-21 Automated clamping force regulating equipment for molding machine

Publications (1)

Publication Number Publication Date
JP2004249637A true JP2004249637A (en) 2004-09-09

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006098321A1 (en) * 2005-03-16 2006-09-21 Sumitomo Heavy Industries, Ltd. Molding condition setting method and method of controlling injection molding machine
WO2006101165A1 (en) * 2005-03-24 2006-09-28 Sumitomo Heavy Industries, Ltd. Vertical molding machine and molding method therefor
JP2010048294A (en) * 2008-08-20 2010-03-04 Isel Co Ltd Power transmission device
JP2012006194A (en) * 2010-06-23 2012-01-12 Ube Machinery Corporation Ltd Movable platen position measuring method of toggle type mold clamping unit
JP2012254548A (en) * 2011-06-08 2012-12-27 Sumitomo Heavy Ind Ltd Apparatus and method for mold clamping
JP2013123874A (en) * 2011-12-15 2013-06-24 Japan Steel Works Ltd:The Mold clamping force adjusting method
EP2774742A1 (en) 2013-03-07 2014-09-10 Sumitomo Heavy Industries, Ltd. Injection molding machine
EP2993024A1 (en) 2014-09-02 2016-03-09 Sumitomo Heavy Industries, Ltd. Injection molding machine
CN105835329A (en) * 2015-01-29 2016-08-10 住友重机械工业株式会社 Injection moulding machine
CN105835323A (en) * 2015-01-30 2016-08-10 住友重机械工业株式会社 Injection molding machine
KR20160115825A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
KR20160115813A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine and operation screen of injection molding machine
KR20160115815A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
KR20160115826A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
EP3616871A1 (en) * 2018-08-31 2020-03-04 Sumitomo Heavy Industries, Ltd. Injection molding system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006098321A1 (en) * 2005-03-16 2006-09-21 Sumitomo Heavy Industries, Ltd. Molding condition setting method and method of controlling injection molding machine
WO2006101165A1 (en) * 2005-03-24 2006-09-28 Sumitomo Heavy Industries, Ltd. Vertical molding machine and molding method therefor
JPWO2006101165A1 (en) * 2005-03-24 2008-09-04 住友重機械工業株式会社 Vertical molding machine and molding method thereof
JP2010048294A (en) * 2008-08-20 2010-03-04 Isel Co Ltd Power transmission device
JP2012006194A (en) * 2010-06-23 2012-01-12 Ube Machinery Corporation Ltd Movable platen position measuring method of toggle type mold clamping unit
JP2012254548A (en) * 2011-06-08 2012-12-27 Sumitomo Heavy Ind Ltd Apparatus and method for mold clamping
JP2013123874A (en) * 2011-12-15 2013-06-24 Japan Steel Works Ltd:The Mold clamping force adjusting method
EP2774742A1 (en) 2013-03-07 2014-09-10 Sumitomo Heavy Industries, Ltd. Injection molding machine
EP2993024A1 (en) 2014-09-02 2016-03-09 Sumitomo Heavy Industries, Ltd. Injection molding machine
JP2016049756A (en) * 2014-09-02 2016-04-11 住友重機械工業株式会社 Injection molding machine
CN105835329A (en) * 2015-01-29 2016-08-10 住友重机械工业株式会社 Injection moulding machine
CN105835329B (en) * 2015-01-29 2018-11-20 住友重机械工业株式会社 Injection (mo(u)lding) machine
CN105835323A (en) * 2015-01-30 2016-08-10 住友重机械工业株式会社 Injection molding machine
CN105835323B (en) * 2015-01-30 2019-05-07 住友重机械工业株式会社 Injection (mo(u)lding) machine
KR20160115825A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
KR20160115813A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine and operation screen of injection molding machine
KR20160115815A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
KR20160115826A (en) 2015-03-27 2016-10-06 스미도모쥬기가이고교 가부시키가이샤 Injection molding machine
EP3616871A1 (en) * 2018-08-31 2020-03-04 Sumitomo Heavy Industries, Ltd. Injection molding system

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