JP5754700B2 - Molding machine - Google Patents

Description

  The present invention relates to a molding machine. The molding machine is, for example, a die casting machine or an injection molding machine.

  In a so-called horizontal mold-clamping horizontal injection molding machine in which the mold opening / closing direction and the injection direction are horizontal, a molding material (for example, molten metal: a molten metal material) is supplied to the injection sleeve before the mold closing is completed. Then, the molten metal flows down between the molds. For this reason, the supply of the molten metal to the injection sleeve is generally performed after the mold closing is completed, which hinders the shortening of the cycle time.

  In Patent Document 1, an injection sleeve that is inserted into a fixed mold and communicates with a cavity, and a sliding member (weir) that is slidably provided on the fixed mold and blocks the molten metal at the cavity side end of the injection sleeve. A die casting machine is disclosed. In this die casting machine, by preventing the molten metal from flowing down by the sliding member, it is possible to supply the molten metal to the injection sleeve before the mold is closed, and thus it is possible to shorten the cycle time.

  Although not related to the shortening of the cycle time, a technique for tilting both the mold clamping device (mold opening / closing direction) and the injection sleeve with respect to the horizontal direction (Patent Document 2), and the mold clamping device (mold opening / closing direction). And the technique (patent document 3) which inclines an injection sleeve with respect to a horizontal direction is known. Moreover, the technique which adjusts the timing of hot water supply automatically is known (patent document 4).

Special table 2009-512558 JP-A-5-57416 Japanese Patent Laid-Open No. 8-11262 Japanese Patent Laid-Open No. 06-315756

  In the technique of Patent Document 1, a sliding member and its driving device are required. Further, the mold needs to be configured to be able to accommodate a sliding member or the like, and the structure becomes complicated. Furthermore, when the molten metal injection is completed, surplus metal exists between the sliding member and the injection plunger, and the surplus metal inhibits release of the molded product from the fixed mold after the molten metal is solidified. Engaging the sliding member. For this reason, for example, it becomes difficult to release the molded product from the fixed mold, or after the molten metal is solidified, an operation and time are required such as retracting the sliding member and pushing out the excess metal.

  An object of the present invention is to provide a molding machine that can shorten the cycle time with a simple configuration.

  The molding machine of the present invention communicates with a mold clamping device that opens and closes a fixed mold and a movable mold in a horizontal direction or a direction inclined with respect to the horizontal direction, a cavity constituted by the fixed mold and the movable mold, and the cavity An injection device having an injection sleeve inclined with respect to a horizontal direction so that the side is higher than the opposite side, and an injection device for extruding the molding material in the injection sleeve into the cavity; and a supply device for supplying the molding material to the injection sleeve And a control device for controlling the supply device so that the time for supplying the molding material to the injection sleeve and the time for closing the mold overlap at least partially.

  Preferably, the control device controls the supply device so that the supply of the molding material to the injection sleeve is completed before the mold contact.

  Preferably, the supply device has a ladle that pumps the molding material from the heat-retaining furnace and pours the pumped molding material into the injection sleeve, and the control device has a predetermined reference operation from the time of a predetermined reference operation of the supply device. When the waiting time has elapsed, the supply device is controlled to start pumping the molding material from the heat-retaining furnace, and the supply from the time of the reference operation until the supply of the molding material to the injection sleeve is completed The waiting time in the next cycle is measured such that the time difference between the time of the reference operation and the mold contact is measured and the time difference obtained by subtracting the supply time from the mold closing time is 0 or a predetermined set time difference. Adjust.

  Preferably, the mold opening / closing direction and the injection direction are the same direction.

  Preferably, the inclination angle of the mold opening / closing direction and the injection direction with respect to the horizontal direction is fixed.

  Preferably, the inclination angle of the mold opening / closing direction and the injection direction with respect to the horizontal direction is variable.

  Preferably, the mold opening / closing direction is a horizontal direction, and the injection direction is inclined with respect to the mold opening / closing direction.

  Preferably, the inclination angle in the injection direction with respect to the horizontal direction and the mold opening / closing direction is fixed.

  Preferably, the inclination angle of the injection direction with respect to the horizontal direction and the mold opening / closing direction is variable.

  Preferably, the injection sleeve is formed with a supply port that opens upward and into which a molding material is poured by the supply device, and the injection device has a closing member that opens and closes the supply port.

  According to the present invention, the cycle time can be shortened with a simple configuration.

The front view including sectional drawing which shows the structure of the principal part of the die-casting machine which concerns on the 1st Embodiment of this invention. The front view which shows the structure of the principal part of the hot-water supply apparatus of the die-casting machine of FIG. The front view containing sectional drawing which expands and shows the injection sleeve vicinity of the die-casting machine of FIG. The block diagram which shows the structure of the signal processing system of the control apparatus of the die-casting machine of FIG. The timing chart explaining operation | movement of the die-casting machine of FIG. The front view including sectional drawing which shows the structure of the principal part of the die-casting machine concerning the 2nd Embodiment of this invention. The front view including sectional drawing which shows the structure of the principal part of the die-casting machine concerning the 3rd Embodiment of this invention. The front view including sectional drawing which expands and shows the injection sleeve vicinity of the die-casting machine of FIG. The front view including sectional drawing which shows the structure of the principal part of the die-casting machine concerning the 4th Embodiment of this invention. Sectional drawing which shows the principal part of the die-casting machine of the 5th Embodiment of this invention.

<First Embodiment>
FIG. 1 is a front view including a cross-sectional view showing a configuration of a main part of a die casting machine 1 according to a first embodiment of the present invention.

  The die casting machine 1 is configured as a so-called cold chamber machine, and includes a machine body 3, a hot water supply device 5 (see FIG. 2) for supplying molten metal to the machine body 3, and a control device 7 for controlling these operations. doing.

  The machine body 3 includes a mold clamping device 9 for performing mold opening / closing and clamping of the fixed mold 101 and the movable mold 103, and a cavity 105 formed by the clamped fixed mold 101 and the movable mold 103. It has an injection device 11 for injecting molten metal, an extrusion device 13 for extruding a molded die-cast product (molded product) from the moving mold 103, and a base portion 15 for supporting the mold clamping device 9 and the injection device 11. .

  The base portion 15 may be regarded as a part of the mold clamping device 9 and the injection device 11. The cavity 105 is configured by closing the fixed mold 101 and the movable mold 103. However, in the present application, for convenience, the side where the cavity 105 is formed (divided surface) even when the mold is not opened. The term “cavity 105” may be used, such as “the side” is referred to as the cavity 105 side.

  The mold clamping device 9 and the injection device 11 are configured to be used in a general die casting machine in which the mold opening / closing direction and the injection direction are horizontal. The base portion 15 supports the mold clamping device 9 and the injection device 11 so that the mold clamping device 9 and the injection device 11 are inclined with respect to the horizontal direction (direction parallel to the installation surface BL). Thereby, in the machine main body 3, the mold opening / closing direction and the injection direction are inclined with respect to the horizontal direction. Specifically, it is as follows.

  The mold clamping device 9 basically has a fixed die plate 17 that holds the fixed mold 101, a movable die plate 19 that holds the movable mold 103, and a fixed die plate 17 and a movable die plate 19 that are hung. One or a plurality of (for example, four) tie bars 21.

  The fixed die plate 17 and the movable die plate 19 are erected so as to oppose each other, and hold the fixed mold 101 or the movable mold 103 on the mutually opposing surfaces (front surfaces). The movable die plate 19 is movable in the mold opening / closing direction (opposite direction) indicated by the arrow y1 with respect to the fixed die plate 17, and the moving die plate 19 moves in the mold opening / closing direction with respect to the fixed die plate 17. Thus, the fixed mold 101 and the movable mold 103 are opened and closed.

  The tie bar 21 extends in the mold opening / closing direction, and one end thereof is fixed to one of the fixed die plate 17 and the movable die plate 19 (in this embodiment, the fixed die plate 17). Then, a tensile force is applied to the tie bar 21 in a state where the fixed mold 101 or the movable mold 103 is closed, so that the fixed mold 101 and the movable mold 103 are in accordance with the extension amount of the tie bar 21. Mold clamping force is applied.

  In this embodiment, as a mold opening / closing drive device for moving the movable die plate 19 and a mold clamping drive device for applying a tensile force to the tie bar 21, a toggle mechanism that serves as both of them and a drive force is applied to the toggle mechanism. The mold clamping cylinder apparatus to illustrate is illustrated. However, the mold opening / closing drive device and the mold clamping drive device are not limited thereto, and may be various known ones.

  The injection device 11 includes an injection sleeve 23 that communicates with the cavity 105, an injection plunger 25 that can slide within the injection sleeve 23, and an injection cylinder device 27 that can drive the injection plunger 25.

  The injection sleeve 23 is formed in a cylindrical shape, and communicates with the cavity 105 by being inserted through the fixed die plate 17 and the fixed mold 101. A hot water supply port 23 a (see FIG. 3) is formed on the upper surface of the injection sleeve 23 in order to supply the molten metal ML into the injection sleeve 23.

  The injection plunger 25 has a plunger tip 25 a that fits into the injection sleeve 23, and a plunger rod 25 b that is fixed to the plunger tip 25 a and extends from the injection sleeve 23. The molten metal supplied into the injection sleeve 23 is injected and filled into the cavity 105 as the plunger tip 25a advances toward the cavity 105.

  The injection cylinder device 27 is disposed coaxially with the injection plunger 25, and its piston rod 27 a is connected to the injection plunger 25. Then, when the hydraulic fluid is supplied from a hydraulic circuit (not shown), the injection plunger 25 is moved forward or backward.

  The injection sleeve 23, the injection plunger 25, and the injection cylinder device 27 are arranged with the mold opening / closing direction of the mold clamping device 9 as the axial direction. Therefore, the mold opening / closing direction and the injection direction are the same direction.

  The base portion 15 supports the mold clamping device 9 and the injection device 11 so that the injection device 11 side is lower than the horizontal direction. The base unit 15 includes, for example, a base main body 29 that supports the mold clamping device 9 and the injection device 11, and an inclined support member 31 that supports the base main body 29.

  The base main body 29 may be the same as that configured to use the mold clamping device 9 and the injection device 11 with the mold opening / closing direction and the injection direction set in the horizontal direction. In other words, the portion excluding the inclined support member 31 from the machine main body 3 may be a general horizontal mold clamping horizontal injection machine main body in which the mold opening / closing direction and the injection direction are horizontal.

  The tilt support member 31 supports the base body 29 so that the base body 29 is tilted with respect to the horizontal direction. Thereby, the machine body 3 in which the mold opening / closing direction and the injection direction are inclined with respect to the horizontal direction is realized. The inclined support member 31 may be appropriately configured. In FIG. 1, the case where the some inclination support member 31 is comprised by the some columnar member is illustrated.

  FIG. 2 is a front view illustrating a configuration of a main part of the hot water supply device 5 of the die casting machine 1.

  The hot water supply device 5 pumps out the molten metal ML held in the heat-retaining furnace 111 and pours it into the hot water supply port 23a (see FIG. 3), an arm 35 that supports the radle 33, and a base body 37 that supports the arm 35. And have.

  The ladle 33 has a container body 33a and a spout 33b that protrudes outward from the edge of the container body 33a. For example, the ladle 33 is rotatably connected to the tip of the arm 35 on the spout 33b side.

  For example, the rotation of a ladle motor 39 (see FIG. 4) built in the base body 37 is transmitted to the ladle 33 via a transmission mechanism including a chain or the like built in the arm 35. Thereby, the ladle 33 is driven to incline at a desired angle.

  The arm 35 is configured by, for example, a plurality of long members rotatably connected to each other, and constitutes a link mechanism. The arm 35 is rotated at a predetermined position on the base side by an arm motor 41 (see FIG. 4) built in the base body 37, so that the ladle 33 is moved to a position in the heat-retaining furnace 111 (shown by an arrow Lm). It is moved between the descent stop position PS) and the position on the hot water supply port 23a (the pouring position PT).

  The ladle 33 can be pumped out of the molten metal ML in the heat insulating furnace 111 by being pulled up from the position (descent stop position PS) immersed in the molten metal ML in the heat insulating furnace 111 onto the molten metal ML.

  Note that the ladle 33 can pump out a sufficient amount of molten metal ML necessary for one-shot casting by inclining at a predetermined inclination angle θ so that the pouring spout 33b side is upward. The ladle 33 may be inclined at a predetermined inclination angle θ from before being immersed in the molten metal ML until it is pulled up from the molten metal ML, or after being pulled up from the molten metal ML, it is inclined on the heat insulating furnace 111. It may be inclined at an angle θ.

  The ladle 33 can be poured into the injection sleeve 23 by being inclined so that the pouring spout 33b side is downward at the pouring position PT on the hot water supply spout 23a.

  FIG. 3 is a front view including an enlarged cross-sectional view showing the vicinity of the injection sleeve 23 of the die casting machine 1.

  As described above, the mold clamping device 9 and the injection device 11 are supported so that the injection device 11 side is lowered. Therefore, the injection sleeve 23 is inclined at an inclination angle α1 with respect to the horizontal direction so that the cavity side is higher than the opposite side.

  As a result, even when the injection sleeve 23 is not closed, the liquid level of the molten metal ML reaches the lower surface edge 23f of the end of the injection sleeve 23 on the cavity side or the liquid level of the molten metal ML. The molten metal ML can be stored until it reaches the lower side edge 23af of the hot water supply port 23a.

  The inclination angle α1, the position of the hot water supply port 23a, and the like are set such that a sufficient amount of molten metal ML can be stored for one shot of casting. Note that either the lower surface edge 23f and the lower side edge 23af may be positioned above, or the heights of both may be the same.

  FIG. 4 is a block diagram showing the configuration of the signal processing system of the control device 7.

  The control device 7 is configured by a computer including a CPU, a ROM, a RAM, and an external storage device (not shown). And each part described below is comprised when CPU runs the program memorize | stored in ROM or the external storage device.

  In the control device 7, a main body control unit 57 that controls the machine main body 3 and a hot water supply control unit 59 that controls the hot water supply device 5 are configured. Note that the main body control unit 57 and the hot water supply control unit 59 may be separated by hardware.

  Between the main body control unit 57 and the hot water supply control unit 59, basically, transmission and reception of signals for synchronizing the machine main body 3 and the hot water supply device 5 are not performed in the molding cycle. However, in the hot water supply control unit 59, the hot water supply time measurement unit 43, the mold closing time measurement unit 45, the comparison calculation unit 47, the increase time calculation unit 49, the time adjustment unit 51, and the motor control unit 53 are configured. 5 is controlled in synchronism with the operation of the machine body 3.

  Since the function of each part of the hot water supply control unit 59 will be clarified in the description of the operation described later with reference to FIG. 5, only the outline will be briefly described here.

  The hot water supply time measurement unit 43 measures the hot water supply time Tm1 from the time of a predetermined reference operation of the hot water supply device 5 to the completion of the pouring of the injection sleeve 23.

  The mold closing time measuring unit 45 measures the mold closing time Tm2 from the time of a predetermined reference operation of the hot water supply device 5 to the time of mold contact.

  The comparison calculation unit 47 calculates a time difference Td (Tm2−Tm1) between the hot water supply time Tm1 measured by the hot water supply time measurement unit 43 and the mold closing time Tm2 measured by the mold closing time measurement unit 45.

  The increase time calculation unit 49 predicts and calculates an increase time Te associated with a decrease in the liquid level of the heat retaining furnace 111 during the time required for the hot water supply operation of the hot water supply device 5.

  The time adjustment unit 51 adjusts and sets the first standby time Ts1 related to the control of the hot water supply device 5 based on the time difference Td calculated by the comparison calculation unit 47 and the predetermined set time difference Tc. In addition, the time adjustment unit 51 adjusts and sets the second standby time Ts2 based on the increase time Te calculated by the increase time calculation unit 49. However, when the calculated first waiting time Ts1 or second waiting time Ts2 does not fall within a predetermined allowable range, the time adjustment unit 51 outputs an abnormality detection signal indicating that an abnormality has been detected.

  The motor control unit 53 controls the arm motor 41 and the ladle motor 39 based on the first standby time Ts1 and the second standby time Ts2 adjusted and set by the time adjustment unit 51. However, when an abnormality detection signal is output from the time adjustment unit 51, the motor control unit 53 performs control set in response to the abnormality, such as stopping the arm motor 41 and the ladle motor 39.

  When the abnormality detection signal is output from the time adjustment unit 51, the notification unit 55 appropriately controls the notification device in order to notify the user of the occurrence of the abnormality. The notification device is, for example, a bell, a speaker, a lamp, and / or a display.

  FIG. 5 is a timing chart for explaining the operation of the die casting machine 1. The horizontal axis indicates time. Each broken line corresponding to the injection process, the mold clamping process, and the hot water supply process indicates that a predetermined operation is performed by changing in the vertical axis direction. 5 is drawn centering on the operation relating to hot water supply, and the mold opening process, the retreating process of the injection plunger 25, and the like are omitted.

  At time E, the movable die plate 19 is located at a predetermined mold opening position, and the fixed mold 101 and the movable mold 103 are in the mold open state. Then, pouring of the molten metal from the ladle 33 to the injection sleeve 23 through the hot water supply port 23a is started in the mold open state. At this time, the molten metal is stored in the inclined injection sleeve 23 as described with reference to FIG.

  At a time point F at which a little time has elapsed from the time point E, mold closing for moving the movable die plate 19 toward the fixed die plate 17 (die closing direction) is started while pouring is continued.

  Thereafter, at time point G, pouring of the injection sleeve 23 is completed while the mold closing is continued. In addition, the liquid level position of the molten metal in the injection sleeve 23 at this time is equal to or less than the height of the lower surface edge portion 23f and the lower side edge portion 23af, as described with reference to FIG.

  At a time point H when a slight time (time difference Td) has elapsed from the time point G, mold contact occurs in which the movable mold 103 contacts the fixed mold 101 (mold closing is completed). At the same time, an injection process of pushing the molten metal of the injection sleeve 23 into the cavity 105 by the injection plunger 25 is started. More specifically, at time point G, low-speed injection is started to advance the injection plunger 25 at a relatively low speed in order to suppress air entrainment by the molten metal.

  Further, at time point G, mold clamping for applying a mold clamping force to the closed mold 101 and the movable mold 103 is started. When the mold clamping is completed (time point I), high-speed injection that advances the injection plunger 25 at a relatively high speed is started (time point J). Thereafter, pressure increase is started to press the molten metal in the cavity 105 by the injection plunger 25 to increase the pressure of the molten metal to a predetermined casting pressure (time point K). After the pressure increase is completed, the increased pressure is maintained at the casting pressure. The holding pressure is started (time L).

  The ladle 33 that has completed pouring at the time point G moves toward the heat insulating furnace 111. Then, at time A, the first standby position PA (FIG. 2) on the heat insulation furnace 111 is reached, and the process waits until it is time for the molten metal to be pumped from the heat insulation furnace 111 for the next molding cycle. The time A is, for example, a time after the start time L of the pressure holding process.

  While the pressure holding process started at the time L is continued, the molten metal in the cavity 105 is solidified to form a molded product. Thereafter, although not shown in FIG. 5, the movable die plate 19 is moved to the mold opening position, the mold opening for separating the fixed mold 101 and the movable mold 103 is performed, and the molded product is taken out.

  As described above, pouring by the hot water supply device 5 is completed before the mold contact (time point H) (time point G). As described above with reference to FIG. 3, the molten metal can be supplied to the injection sleeve 23 before the mold contact because the injection sleeve 23 is inclined.

  The main body control unit 57 basically performs the mold closing process, the mold clamping process, the injection process, the pressure increasing / holding process, the mold opening process, and the like in the machine main body 3, and the operation of the hot water supply device 5 is a starting condition for each process. Instead, it is executed based on the set control procedure.

  For example, the main body control unit 57 starts closing the mold when a predetermined process such as a spraying process on the fixed mold 101 and the movable mold 103 that are opened is completed (time point F).

  Further, for example, when the mold contact is detected based on the detection value of a position sensor (not shown) that detects the position of the movable die plate 19, the main body control unit 57 starts mold clamping and low-speed injection (time H ).

  For example, when the main body control unit 57 detects that the injection plunger 25 has reached a predetermined switching position by a position sensor (not shown), the main body control unit 57 starts high-speed injection (time point J).

  Further, for example, when the main body controller 57 detects that the injection plunger 25 has reached a predetermined pressure increase start position by a position sensor (not shown), the main body controller 57 starts pressure increase (time point K).

  Further, for example, when the main body control unit 57 detects that the pressure in the cavity 105 has reached a predetermined casting pressure by a pressure sensor (not shown), it starts holding pressure (time L).

  Further, for example, the main body control unit 57 starts mold opening when a predetermined time has elapsed from the start of pressure holding. When the completion of mold opening is detected based on the detection value of a position sensor (not shown) that detects the position of the movable die plate 19, the spray process is started.

  On the other hand, the hot water supply control unit 59 synchronizes the operation of the hot water supply device 5 with the operation of the machine main body 3 so that the molten metal completion point G comes earlier than the mold contact point H by a set time difference Tc. Specifically, it is as follows.

  When the ladle 33 reaches the first standby position PA (FIG. 2) after pouring is completed, the hot water supply control unit 59 starts measuring the hot water supply time Tm1 and the mold closing time Tm2 (time point A). In the first molding cycle, an appropriate time set by the manufacturer or user may be set as the measurement start time. The same applies to the start time of a timer related to a first waiting time Ts1 described later.

  The detection of the arrival of the ladle 33 to the first standby position PA is performed, for example, based on the detection result of an encoder (not shown) that detects the rotation of the arm motor 41, or the position of the ladle 33 is detected. This is performed based on the detection result of a contact type or non-contact type sensor (not shown). The same applies to other positions such as a second standby position PC and a pouring position PT described later.

  In addition, the hot water supply control unit 59 starts counting the timer when the ladle 33 reaches the first standby position PA. When the time counted by the timer reaches a predetermined first standby time Ts1 (time point B), the ladle 33 starts to pump out the molten metal from the heat retaining furnace 111.

  The first waiting time Ts1 is appropriately set by the manufacturer or user of the die casting machine 1 in the first molding cycle. In the second and subsequent molding cycles, the first standby time Ts1 is adjusted and set by the hot water supply control unit 59, as will be described later.

  Specifically, the hot water supply control unit 59 first controls the arm motor 41 to lower the ladle 33 from the first standby position PA in order to immerse the ladle 33 in the molten metal ML. Next, when the hot water supply control unit 59 detects that the ladle 33 is immersed in the molten metal ML based on a detection value of a hot water level detection sensor (not shown), the rotation of the arm motor 41 is stopped and the ladle 33 is stopped. Stops descending.

  Since the molten metal ML is pumped out by the ladle 33 and the molten metal ML is lowered by the ladle 33, the descending stop position PS (FIG. 2) of the ladle 33 is also lowered by repeating the molding cycle. To go.

  Next, the hot water supply control unit 59 rotates the arm motor 41 in the reverse direction to pull up the ladle 33 from the molten metal ML. Thereby, the molten metal ML of the heat retaining furnace 111 is pumped out by the ladle 33. The ladle 33 is inclined at the inclination angle θ as described above.

  When the ladle 33 pulled up from the molten metal ML reaches the second standby position PC (FIG. 2) on the heat insulating furnace 111 (time point C), the hot water supply control unit 59 stops the arm motor 41 and stops the ladle 33. . Then, the hot water supply control unit 59 causes the ladle 33 to wait at the second standby position PC during the second standby time Ts2. During this time, the shaking of the molten metal pumped to the ladle 33 is reduced.

  For example, the second standby position PC is set to a predetermined height (movement amount) from the descent stop position PS. In this case, when the molding cycle is repeated, the second standby position PC is lowered as the lowering stop position PS is lowered. Further, for example, the second standby position PC is set to a constant position over the molding cycle, similarly to the first standby position PA.

  The second waiting time Ts2 includes an increase time Te (FIG. 4) with respect to the second waiting time Ts2 in the previous molding cycle (the second waiting time Ts2 set by the manufacturer or the user in the first molding cycle). The time for performing the correction considering the above is set. This will be described later.

  When the second waiting time Ts2 elapses (time point D), the hot water supply control unit 59 controls the arm motor 41 so as to move the ladle 33 toward the hot water supply port 23a. Then, when the ladle 33 reaches the pouring position PT (FIG. 2) on the hot water supply port 23a, the hot water supply control unit 59 stops the arm motor 41. Then, the hot water supply control unit 59 rotates the ladle motor 39 to incline the ladle 33 and starts hot water supply to the injection sleeve 23 (time point E).

  The hot water supply control unit 59 can detect the completion of pouring based on, for example, a detection value of an encoder (not shown) that detects the rotation of the ladle motor 39. And hot water supply control part 59 will end measurement of hot water supply time Tm1, if it detects that pouring has been completed (time G).

  The main body control unit 57 and the hot water supply control unit 59 are, for example, based on the detection results of a position sensor (not shown) that detects the position of the movable die plate 19 or a contact-type sensor (not shown) that detects mold contact. Contact can be detected. When the hot water supply control unit 59 detects the mold contact (time point H), the hot water supply control unit 59 ends the measurement of the mold closing time Tm2.

  The hot water supply control unit 59 calculates a time difference Td between the hot water supply time Tm1 and the mold closing time Tm2. Then, the first standby time Ts1 is adjusted and set so that the time difference Td matches the predetermined set time difference Tc. For example, a new first waiting time Ts1 is obtained by subtracting the excess (Td−Tc) of the time difference Td with respect to the set time difference Tc from the first waiting time Ts1 in the current molding cycle.

  As a result, the time point B when the pumping of the molten metal by the ladle 33 is started is automatically set so that the mold contact is performed after the set time difference Tc elapses from the completion of pouring according to the actual measurement value of the time required for the operation of the machine body 3. Will be set automatically. The set time difference Tc is appropriately set by the user via an input device (not shown), for example.

  Next, the increase time Te will be described. It is assumed that the molten metal surface is lowered by ΔH in the heat insulating furnace 111 as compared with the previous cycle. In this case, the time for the ladle 33 to reach the descending stop position PS from the first standby position PA is longer by ΔH / Vd than the previous molding cycle, where the descending speed of the ladle 33 is Vd.

  Further, assuming that the second standby position PC is set to a predetermined height from the descending stop position PS, the time for the ladle 33 to reach the pouring position PT from the second standby position PC is determined by the advance speed of the ladle 33. As Vf, ΔH / Vf becomes longer than the previous molding cycle.

  Alternatively, if the second standby position PC is set to a constant position over the molding cycle, similarly to the first standby position PA, the time to reach the second standby position PC from the descending stop position PS is When the rising speed of the ladle 33 is Vu, ΔH / Vu becomes longer than the previous molding cycle.

  Therefore, the movement time of the ladle 33 from the first standby position PA to the pouring position PT becomes longer than Te = ΔH / Vd + ΔH / Vf or Te = ΔH / Vd + ΔH / Vu with respect to the previous molding cycle.

  Therefore, the hot water supply control unit 59 calculates the increase time Te from the above equation before the arrival of the time point C, and sets a value obtained by subtracting the calculated increase time Te from the second standby time Ts2 as Ts2 of the current molding cycle. To do.

  Thereby, the time from the time point B to the time point G (the hot water supply time Tm1−the first standby time Ts1) is constant regardless of the decrease in the hot water level.

  The values of ΔH, Vd, and Vf or Vu may be input by the manufacturer or user to the hot water supply control unit 59 via an input device (not shown), or the hot water supply control unit 59 via an appropriate sensor. May get.

  According to the above embodiment, the die casting machine 1 includes the mold clamping device 9, the injection device 11, the hot water supply device 5, and the control device 7. The mold clamping device 9 opens and closes the fixed mold 101 and the movable mold 103 in a direction inclined with respect to the horizontal direction. The injection device 11 has an injection sleeve 23 that communicates with a cavity 105 constituted by a fixed mold 101 and a movable mold 103 and is inclined with respect to the horizontal direction so that the cavity 105 side is higher than the opposite side. The molten metal in the injection sleeve 23 is pushed out into the cavity 105. The hot water supply device 5 supplies the molten metal to the injection sleeve 23. The control device 7 controls the hot water supply device 5 so that the time for supplying the molten metal to the injection sleeve 23 and the time for mold closing overlap at least partially.

  Therefore, in the past, the cycle time can be shortened by starting the supply of the molten metal, which has generally been performed after the mold contact, to the injection sleeve 23 before the mold contact. Further, since the molten metal is stored in the inclined injection sleeve 23, the molten metal can be supplied to the injection sleeve 23 before the mold contact. Therefore, a weir (described in the background art section) is provided on the cavity 105 side of the injection sleeve 23. The cycle time can be shortened with a simple configuration without providing a sliding member.

  The control device 7 controls the hot water supply device 5 so that the supply of the molding material to the injection sleeve 23 is completed before the mold contact. Therefore, the machine body 3 can start injection immediately after the mold contact. As a result, the cycle time can be further shortened.

  The hot water supply device 5 has a ladle 33 that pumps the molten metal from the heat-retaining furnace 111 and pours the pumped molten metal into the injection sleeve 23. When the first standby time Ts1 has elapsed from the point A of the predetermined reference operation of the hot water supply device 5 (the operation in which the ladle 33 reaches the first standby position PA), the control device 7 pumps out the molten metal from the heat insulating furnace 111. The hot water supply device 5 is controlled so as to start, and the hot water supply time Tm1 from the time point A until the supply of the molten metal to the injection sleeve 23 is completed and the mold closing time Tm2 from the time point A to the mold contact are measured. The first standby time Ts1 in the next cycle is adjusted so that a time difference Td obtained by subtracting the hot water supply time Tm1 from the closing time Tm2 becomes a predetermined set time difference Tc. Therefore, the hot water supply device 5 can be automatically synchronized with the machine body 3 so that the hot water supply is completed before the mold contact.

  In the die casting machine 1, the mold opening / closing direction and the injection direction are the same direction. Therefore, the machine main body 3 of the present embodiment can be configured using a general horizontal mold clamping horizontal injection machine main body in which the horizontal direction is the mold opening / closing direction and the injection direction.

  In the die casting machine 1, since the inclination angle of the mold opening / closing direction and the injection direction with respect to the horizontal direction is fixed, the configuration is simplified compared to the second embodiment described later, and the cost can be reduced.

<Second Embodiment>
FIG. 6 is a front view including a cross-sectional view showing a configuration of a main part of a die casting machine 201 according to the second embodiment of the present invention.

  The die casting machine 201 is different from the first embodiment only in the configuration of the base portion of the machine body. Specifically, the base portion 15 of the machine main body 3 of the first embodiment is a fixed type that cannot change the inclination angle α1 (see FIG. 3) of the machine main body 3, whereas The base portion 215 of the machine body 203 according to the second embodiment is a variable type that can change the tilt angle of the machine body 3.

  The base part 215 includes, for example, the same base body 29 as that of the first embodiment, and an inclined support mechanism 231 that supports the base body 29. The tilt support mechanism 231 can change the tilt angle α <b> 1 of the mold clamping device 9 and the injection device 11.

  The inclined support mechanism 231 may be appropriately configured. In FIG. 6, an inclined support mechanism constituted by a shaft support member that rotatably supports the injection device 11 side of the base body 29 and a jack that can raise and lower the mold clamping device 9 side of the base body 29. 231 is illustrated. The inclined support mechanism 231 may be driven by human power or may be driven by a driving device such as an electric motor.

  Note that the inclination angle α1 is adjusted before the start of a molding cycle such as when a mold is exchanged, and is then fixed. The operation in the molding cycle of the die casting machine 201 is the same as the operation in the molding cycle of the die casting machine 1 of the first embodiment.

  According to the second embodiment described above, the same effect as in the first embodiment can be obtained. That is, the cycle time can be shortened by starting the supply of the molten metal to the injection sleeve 23 before the mold contact, and the injection before the mold contact can be achieved by storing the molten metal in the inclined injection sleeve 23. Since the molten metal can be supplied to the sleeve 23, the cycle time can be shortened with a simple configuration without providing a weir on the cavity 105 side of the injection sleeve 23.

  In the die casting machine 201, since the inclination angle α1 in the mold opening / closing direction and the injection direction with respect to the horizontal direction is variable, the inclination angle α1 can be appropriately set according to the mold to be attached, etc. High flexibility.

<Third Embodiment>
FIG. 7 is a front view including a cross-sectional view showing a configuration of a main part of a die casting machine 301 according to the third embodiment of the present invention.

  In the machine body 3 of the die casting machine 1 of the first embodiment, the mold opening / closing direction of the mold clamping device 9 and the injection direction of the injection device 11 are the same direction, and both are inclined with respect to the horizontal direction. On the other hand, in the machine body 303 of the die casting machine 301 of the third embodiment, the mold opening / closing direction of the mold clamping device 309 and the injection direction of the injection device 311 are different.

  Specifically, in the die casting machine 301, the mold opening / closing direction is a horizontal direction, and the injection direction is inclined so that the cavity 105 side is higher than the horizontal direction. In other words, the die casting machine 301 is provided so that the injection device is inclined in a general horizontal die-clamping horizontal injection die casting machine.

  The mold clamping device 309 and the injection device 311 may be appropriately installed on the installation surface BL. In FIG. 7, the mold clamping device 309 and the injection device 311 are installed on the installation surface BL via a base portion 315 common to them. The base part 315 may be used in a general horizontal die-clamping horizontal injection die casting machine.

  FIG. 8 is a front view including an enlarged sectional view showing the vicinity of the injection sleeve 23 of the die casting machine 301.

  As described above, the mold clamping device 309 is disposed such that the mold opening / closing direction indicated by the arrow y2 is the horizontal direction, and the injection device 311 is disposed such that the cavity side is raised. The injection sleeve 23 is inclined at an inclination angle α2 with respect to the horizontal direction so that the cavity side is higher than the opposite side.

  Therefore, the injection sleeve 23 is in the same manner as in the first embodiment until the liquid level of the molten metal ML reaches the lower surface edge 23f of the end of the injection sleeve 23 on the cavity side even when the mold is not closed. Alternatively, the molten metal ML can be stored until the liquid level of the molten metal ML reaches the lower side edge 23af of the hot water supply port 23a.

  The fixed mold 151 and the fixed die plate 317 are configured so that the injection sleeve 23 can be inserted obliquely. The operation of the die casting machine 301 is the same as the operation of the die casting machine 1 of the first embodiment.

  According to the above third embodiment, the same effect as in the first embodiment can be obtained. That is, the cycle time can be shortened by starting the supply of the molten metal to the injection sleeve 23 before the mold contact, and the injection before the mold contact can be achieved by storing the molten metal in the inclined injection sleeve 23. Since the molten metal can be supplied to the sleeve 23, the cycle time can be shortened with a simple configuration without providing a weir on the cavity 105 side of the injection sleeve 23.

  Since the mold opening / closing direction is a horizontal direction and the injection direction is inclined with respect to the mold opening / closing direction, a support mechanism or the like of the mold clamping device 309 can be a general horizontal mold clamping. Therefore, depending on the configuration of the die casting machine, the cost may be reduced as compared with the first and second embodiments.

  In the die casting machine 301, since the inclination angle α2 in the injection direction with respect to the horizontal direction and the mold opening / closing direction is fixed, the configuration is simplified and the cost can be reduced compared to a fourth embodiment described later.

<Fourth Embodiment>
FIG. 9 is a front view including a cross-sectional view showing a configuration of a main part of a die casting machine 401 according to the fourth embodiment of the present invention.

  The die casting machine 301 of the third embodiment is a fixed type that cannot change the inclination angle α2 (FIG. 8) of the injection device 311, whereas the die casting machine 401 of the fourth embodiment is It is a variable type that can change the inclination angle α2 of the injection device 411.

  For example, the machine main body 403 of the die casting machine 401 has an inclination support mechanism 431 that supports the injection apparatus 411 so that the inclination angle α2 of the injection apparatus 411 can be changed. The inclined support mechanism 431 may be regarded as a part of the injection device 411.

  The inclined support mechanism 431 may be appropriately configured. In FIG. 9, an inclined support mechanism 431 is configured including an adjustment screw that is mounted on a base 415 provided in common to the mold clamping device 409 and the injection device 411 and constitutes a leg that supports the injection cylinder device 27 and the like. The case is shown as an example. The tilt support mechanism 431 adjusts the height of a plurality of positions of the injection device 411 by changing the screwing position of the adjustment screw on the injection device 411 side, and consequently adjusts the tilt angle of the injection device 411. The tilt support mechanism 431 may be driven by human power or may be driven by a driving device such as an electric motor.

  The fixed die plate 417 is configured so that the injection sleeve 23 can be inserted obliquely and the inclination angle thereof can be adjusted. The inclination angle α2 is adjusted before the start of a molding cycle, such as when changing molds, and is then fixed. The operation of the die casting machine 401 in the molding cycle is the same as the operation in the molding cycle of the die casting machine 1 of the first embodiment.

  According to the above fourth embodiment, the same effect as in the first embodiment can be obtained. That is, the cycle time can be shortened by starting the supply of the molten metal to the injection sleeve 23 before the mold contact, and the injection before the mold contact can be achieved by storing the molten metal in the inclined injection sleeve 23. Since the molten metal can be supplied to the sleeve 23, the cycle time can be shortened with a simple configuration without providing a weir on the cavity 105 side of the injection sleeve 23.

  In the injection device 411, since the inclination angle of the injection sleeve 23 with respect to the horizontal direction and the mold opening / closing direction is variable, the inclination angle α2 can be set to an appropriate size according to the mold to be attached, etc. High flexibility.

<Fifth Embodiment>
FIG. 10 is a cross-sectional view showing the main part of the die casting machine of the fifth embodiment.

  The die casting machine of the fifth embodiment is different from the first to fourth embodiments only in having a closing device 61 that can open and close the hot water supply port 23a.

  The closing device 61 includes, for example, a closing member 63 that can move between a position where the hot water supply port 23 a is closed and a position where the hot water supply port 23 a is opened, and a drive device 65 that drives the closing member 63.

  The closing member 63 can open and close the hot water supply port 23a by sliding and moving with respect to the injection sleeve 23, for example. The slide direction is the same as the injection direction, for example. Further, the drive device 65 is constituted by, for example, an air cylinder, the piston rod is fixed to the closing member 63, and the cylinder tube is fixed directly or indirectly to the injection sleeve 23.

  The operation of the die casting machine of the fifth embodiment is generally the same as the operation of the die casting machine 1 of the first embodiment. However, when pouring the injection sleeve 23 through the hot water supply port 23a by the ladle 33, the closing device 61 opens the hot water supply port 23a, and when the pouring is completed, the closing device 61 opens the hot water supply port 23a. close up. Then, the closing device 61 opens the hot water supply port 23a again at an appropriate time after the plunger tip 25a passes the hot water supply port 23a and before the pouring of the next cycle is started. The operation of the closing device 61 is controlled by the control device 7.

  According to the fifth embodiment described above, the injection sleeve 23 is formed with the hot water supply port 23a that opens upward and into which the molten metal is poured by the hot water supply device 5. The injection device opens and closes the hot water supply port 23a. Since it has the closure member 63 to perform, it can suppress that a molten metal overflows from the hot water supply port 23a simply.

  In the first to fifth embodiments described above, the die casting machines 1, 201, 301 and 401 are examples of the molding machine of the present invention, and the molten metal is an example of the molding material of the present invention. And 151 are examples of the fixed mold of the present invention, the moving mold 103 is an example of the movable mold of the present invention, the hot water supply apparatus 5 is an example of the supplying apparatus of the present invention, and the ladle 33 is at the first standby position PA. The operation that reaches is an example of the reference operation.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The molding machine is not limited to a die casting machine. For example, the molding machine may be another metal molding machine, a plastic injection molding machine, or a molding machine that molds a material obtained by mixing wood powder with a thermoplastic resin or the like. Good.

  When the molding machine is a die casting machine, the die casting machine is not limited to a cold chamber machine, and may be a so-called hot chamber machine, for example. When the die casting machine is a hot chamber machine, a portion generally called a nozzle corresponds to the injection sleeve of the present invention, and an injection plunger is a sleeve communicating with the nozzle via a gooseneck or the like (corresponding to the injection sleeve of the present invention) Do not slide) to push the molten metal in the nozzle into the cavity. In the hot chamber machine, the injection device and the supply device of the present invention are integrated.

  The configuration in which both the mold opening / closing direction and the injection direction or the injection direction is inclined with respect to the horizontal direction may be realized as appropriate, and the configuration illustrated in the embodiment is merely an example.

  For example, in the first embodiment, the base body 29 is inclined by the inclined support member 31, but a wedge-shaped base body configured on the assumption that the mold clamping device and the injection device are inclined may be used. Further, for example, the mold opening / closing direction and the injection direction may be inclined by installing a horizontal mold clamping lateral injection mold clamping device and an injection device on an inclined installation surface.

  In addition, for example, the inclined support member may be constituted by a relatively large wedge-shaped member over substantially the entire base body instead of the columnar member, or a plurality of trapezoidal shapes with different heights arranged in the mold opening / closing direction. You may be comprised with a member. Further, the inclined support member may be formed of a hollow member or a solid member.

  Further, for example, the drive device that changes the inclination angle of at least one of the mold clamping device and the injection device may be configured by a hydraulic cylinder device that lifts the mold clamping device or the like instead of a device that includes a jack or a screw.

  Further, for example, the base portion (fixed type or variable type) is not provided in common to the mold clamping device and the injection device, and may be provided separately to each.

  The injection sleeve is not limited to the one in which the molding material is poured into the supply port (23a) that opens upward. Further, the supply device is not limited to the one that pours the molding material into the supply port of the injection sleeve. For example, the injection sleeve may be one in which the molding material is formed through a supply port that opens downward, and the supply device supplies the molding material through the supply port that opens downward by an electromagnetic pump or the like. You may do.

  In the injection sleeve, when the supply port (23a) that is opened upward and the molding material is poured is formed, the closing member is not an essential requirement. For example, the injection plunger may be advanced at a relatively high speed until the plunger tip passes through the supply port to prevent the molding material from overflowing from the supply port, or by forming a weir around the supply port. The material may be prevented from flowing down.

  Further, the closing member is not limited to a slide type member, and may be, for example, a member that moves in a direction opposite to the supply port and is partially fitted into the supply port. Further, the driving device for the closing member is not limited to the air cylinder, and may be a hydraulic cylinder or an electric motor.

  The time for supplying the molding material to the injection sleeve and the time for closing the mold may be at least partially overlapped. In other words, it is not an essential requirement of the present invention that the supply of the molding material to the injection sleeve is completed before the mold contact. For example, the mold contact may be made after the start of pouring to the injection sleeve, and then the pouring may be completed. Further, for example, completion of pouring and mold contact may be performed at the same time.

  The start timing of each operation, such as the start of the supply of the molding material to the injection sleeve, may be appropriately set. For example, the time points B, D, and E shown in the embodiment may be set by the user via an input device (not shown). In the embodiment, the case where signals are not transmitted / received between the main body control unit and the hot water supply control unit in the molding cycle is illustrated, but the operation timing may be determined by performing the transmission / reception. For example, when the signal indicating the completion of hot water supply is input from the hot water supply control unit to the main body control unit, the main body control unit may start a process of starting injection.

  Further, as in the embodiment, when the supply timing of the molding material is adjusted by adjusting the waiting time from the time of the reference operation (the first waiting time Ts1 in the embodiment), the reference operation is performed when the ladle is on the heat insulation furnace. It is not limited to the operation of reaching the standby position. The reference operation may be appropriately selected from operations performed after the completion of the supply of the molding material and before the start of the pumping of the molding material from the warming furnace for the next molding cycle. Further, the reference operation may be set by either the manufacturer or the user of the molding machine.

  Further, the adjustment of the waiting time (Ts1) from the time of the reference operation may be performed so that the time difference (Td) becomes zero. In other words, the mold contact may be performed simultaneously with the completion of the supply of the molding material. In this case, it can also be understood that the set time difference (Tc) is set to zero.

  The second waiting time Ts2 in the embodiment is not an essential requirement, and the adjustment of the second waiting time Ts2 based on the change in the liquid level of the molding material is not an essential requirement. For example, the ladle may move to the injection sleeve supply port immediately after pumping the molding material. In addition, the time adjustment based on the change in the liquid level may be performed for the first standby time Ts1 instead of the second standby time Ts2, for example, the increase time Te is not calculated, and the time difference Td is set to the set time difference. It may be inherent in feedback control that converges to Tc.

  In the present invention, it is not necessary to provide a weir on the cavity side of the injection sleeve, but a weir may be provided on the cavity side of the injection sleeve. Even in this case, there is an advantage that the size of the weir can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Die casting machine, 5 ... Hot water supply apparatus, 9 ... Clamping apparatus, 7 ... Control apparatus, 11 ... Injection apparatus, 23 ... Injection sleeve, 101 ... Fixed mold, 103 ... Moving mold, 105 ... Cavity.

Claims (10)

A mold clamping device for opening and closing the fixed mold and the movable mold in the horizontal direction or in a direction inclined with respect to the horizontal direction;
An injection sleeve that communicates with a cavity constituted by the fixed mold and the movable mold and is inclined with respect to a horizontal direction so that the cavity side is higher than the opposite side; and the molding material in the injection sleeve is An injection device that pushes into the cavity;
A supply device for supplying a molding material to the injection sleeve;
A control device for controlling the supply device so that the time for supplying the molding material to the injection sleeve and the time for mold closing overlap at least partially;
Having a molding machine. The molding machine according to claim 1, wherein the control device controls the supply device so that the supply of the molding material to the injection sleeve is completed before the mold contact. The supply device has a ladle that pumps out the molding material from the heat-retaining furnace and pours the pumped molding material into the injection sleeve.
The controller is
When the predetermined standby time has elapsed from the time of a predetermined reference operation of the supply device, the supply device is controlled to start pumping the molding material from the heat-retaining furnace,
Measuring the supply time from the time of the reference operation to the completion of the supply of the molding material to the injection sleeve, and the mold closing time from the time of the reference operation to the mold contact,
The molding machine according to claim 2, wherein the waiting time in the next cycle is adjusted so that a time difference obtained by subtracting the supply time from the mold closing time becomes 0 or a predetermined set time difference. The molding machine according to any one of claims 1 to 3, wherein the mold opening / closing direction and the injection direction are the same direction. The molding machine according to claim 4, wherein an inclination angle of the mold opening / closing direction and the injection direction with respect to the horizontal direction is fixed. The molding machine according to claim 4, wherein an inclination angle of the mold opening / closing direction and the injection direction with respect to the horizontal direction is variable. The mold opening / closing direction is horizontal,
The molding machine according to claim 1, wherein the injection direction is inclined with respect to the mold opening / closing direction. The molding machine according to claim 7, wherein an inclination angle in an injection direction with respect to a horizontal direction and a mold opening / closing direction is fixed. The molding machine according to claim 7, wherein an inclination angle of the injection direction with respect to the horizontal direction and the mold opening / closing direction is variable. The injection sleeve has an opening on the upper side, and a supply port through which a molding material is poured by the supply device is formed,
The molding machine according to claim 1, wherein the injection device includes a closing member that opens and closes the supply port.

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