JP2017030036A - Vertical type casting apparatus, and method for moving holding furnace of vertical type casting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical type casting apparatus comprising a holding furnace space for accommodating a holding furnace below a stationary platen, and a method for moving the holding furnace of the casting apparatus, with which the holding furnace can be moved almost horizontally without increasing the overall height of the apparatus and without elevating or lowering the holding furnace.SOLUTION: The vertical type casting apparatus includes: a stationary platen 21 and tie bars 22; a movable platen 23 arranged to be elevated and lowered with guidance of the tie bars 22; an elevating/lowering actuator 24 arranged between the stationary platen 21 and the movable platen 23; movable platen fixing means 25 capable of fixing the movable platen 23 to the tie bars 22; stationary platen fixing means 26 capable of selecting fixing or release of the stationary platen 21 to/from the tie bars 22; and a holding furnace space 32 capable of accommodating a holding furnace 41 below the stationary platen 21. In the vertical type casting apparatus, casting is performed by supplying molten metal from the holding furnace 41 accommodated in the holding furnace space 32 to a mold cavity formed between a lower mold 11 and an upper mold 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vertical casting apparatus including a holding furnace space that can store at least a molten metal supply part of a holding furnace below a fixed platen, and a method of moving the holding furnace.

  The casting apparatus is an apparatus for casting a metal product of a desired shape by filling a mold cavity in a mold with a molten metal (molten metal) and cooling and solidifying it. Generally, molds with a two-part structure are clamped by a clamping device (clamping / clamping) with a predetermined clamping force, and filling the mold cavity with molten metal (injection filling) Depending on the combination of methods, there are casting devices of various configurations.

  Among these casting apparatuses, a vertical casting apparatus having a vertical mold clamping apparatus has a mold cavity (space) formed in a mold composed of a lower mold and an upper mold clamped by the vertical mold clamping apparatus. The molten metal is filled from below the mold cavity. Such a vertical casting apparatus includes a vertical injection apparatus, a casting apparatus for a squeeze casting method (molten forging method) in which molten metal is injected and filled at low speed and high pressure, and a molten metal supply member as disclosed in Patent Document 1. Casting for low-pressure casting method in which molten metal is directly charged at low and low pressure from a holding furnace placed below the lower die mounting plate (fixed platen / fixed platen) via (Stoke) The device is known.

  The vertical casting apparatus for the low pressure casting method includes a holding furnace (including a crucible) and at least a molten metal supply part of the holding furnace, in order to fill the molten metal directly from the holding furnace into the mold cavity. It is necessary to connect the molten metal supply member on the holding furnace side to the gate (molten supply port) of the mold (lower mold) through the fixed platen. On the other hand, it is necessary to move the holding furnace from below the fixed plate for supplying molten metal to the holding furnace, maintaining the holding furnace, exchanging the tie bar of the vertical casting apparatus, and maintaining below the fixed plate. Therefore, in the vertical casting apparatus for the low pressure casting method, as in Patent Document 2, the holding furnace and the crucible are arranged in the horizontal movement mechanism via the lifting mechanism, the holding furnace and the crucible are lowered, and the molten metal is supplied. A configuration in which the connection between the member and the mold is released and then moved from below the stationary platen is generally used.

JP 2000-042715 A Japanese Patent Laid-Open No. 09-024455

  In recent years, attempts have been made to cast large parts and thin parts (suspension members, etc.) for automobiles by a low pressure casting method. Accordingly, in order to hold a large amount of molten metal at a stable molten metal temperature, it is necessary to combine a molten furnace holding chamber with different functions and a rectangular (rectangular) holding furnace with a vertical casting apparatus. There is. However, in the conventional configuration in which the holding furnace is arranged in the horizontal movement mechanism via the lifting mechanism, the lifting mechanism becomes larger or complicated in order to lift the entire holding furnace having a rectangular shape evenly. There is a problem.

  Also, the lifting stroke of the holding furnace required to connect the molten metal supply member on the holding furnace side directly to the mold gate via the fixed platen is directly reflected in the overall height of the vertical casting machine, There is a problem that the structural problem contained in the vertical casting apparatus becomes more remarkable.

  The present invention has been made in view of the above-described problems. Specifically, the vertical casting apparatus includes a holding furnace space that can store at least a molten metal supply part of the holding furnace below the fixed platen. Provides a vertical casting apparatus capable of moving the holding furnace substantially horizontally without increasing the overall height of the apparatus and without raising or lowering the holding furnace, and a holding furnace moving method in the vertical casting apparatus. The purpose is to do.

The object of the present invention is to provide a fixed plate to which the lower mold is attached,
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
An elevator actuator disposed between the fixed plate and the movable plate, for raising and lowering one plate of the movable plate or the fixed plate with respect to the other plate;
Movable plate fixing means capable of fixing the movable plate to the tie bar at an arbitrary position;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member This is achieved by a vertical casting apparatus that performs casting by supplying molten metal.

Further, the above object of the present invention is to provide a fixed plate to which the lower mold is attached,
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
A ceiling board disposed above the movable board and fixed to the tie bar;
An elevating actuator disposed between the movable platen and the ceiling plate and elevating the movable plate with respect to the fixed platen;
Connection means capable of arbitrarily connecting the fixed plate and the movable plate;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member This can also be achieved by another vertical casting apparatus that performs casting by supplying molten metal.

  That is, in any of the above vertical casting apparatuses according to the present invention, in normal casting, the movable platen (upper) is moved up and down relative to the fixed platen (lower) to perform the mold opening / closing operation and the mold clamping operation. The fixed platen (downward) can be moved (raised) to the movable platen (upward) side from the normal casting position (fixed platen fixed position) by the lifting / lowering actuator. . With this configuration, the holding furnace can be moved horizontally by raising the stationary platen without increasing the overall height of the apparatus and without raising or lowering the holding furnace.

Moreover, in any of the above vertical casting apparatuses, the fixed platen fixing means prevents the downward movement of the fixed platen at the fixed platen fixing position;
A fixing plate second fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at the fixing plate fixing position;
It is preferable that it is comprised so that.

  On the other hand, in any of the vertical casting apparatuses described above, the lower end side of the tie bar may be configured to be connected to the base member.

And, the former vertical casting apparatus, the movable plate moving step of moving the movable plate away from the fixed plate and moving to a movable plate holding furnace moving position by the lifting actuator,
A movable plate fixing step of fixing the movable plate to the tie bar by the movable plate fixing means at the movable plate holding furnace moving position;
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A fixed platen moving step in which the fixed platen at the fixed platen fixed position is moved closer to the movable platen at the movable platen holding furnace moving position and moved to the fixed platen holding furnace moving position by the lifting actuator;
Thus, the holding furnace space portion is expanded upward, and the holding furnace moving method of the vertical casting apparatus is suitable for carrying in or carrying out at least the molten metal supply portion of the holding furnace substantially horizontally.

Further, the latter, another vertical casting apparatus, has a mold mounting plate connecting step of bringing the movable plate close to the fixed plate by the lifting actuator and connecting the fixed plate and the movable plate by the connecting means. When,
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A movable platen moving step of moving the movable platen connected to the fixed platen by the connecting means to the ceiling plate by the lifting actuator and moving the movable platen to a movable platen holding furnace moving position;
Thus, the holding furnace space portion is expanded upward, and the holding furnace moving method of the vertical casting apparatus is suitable for carrying in or carrying out at least the molten metal supply portion of the holding furnace substantially horizontally.

A vertical casting apparatus according to the present invention includes a stationary platen to which a lower mold is attached,
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
An elevator actuator disposed between the fixed plate and the movable plate, for raising and lowering one plate of the movable plate or the fixed plate with respect to the other plate;
Movable plate fixing means capable of fixing the movable plate to the tie bar at an arbitrary position;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member Since the vertical casting apparatus for casting by supplying the molten metal is used, the holding furnace can be moved substantially horizontally without raising or lowering the holding furnace without increasing the overall height of the apparatus.

Further, another vertical casting apparatus according to the present invention includes a fixed platen to which a lower mold is attached,
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
A ceiling board disposed above the movable board and fixed to the tie bar;
An elevating actuator disposed between the movable platen and the ceiling plate and elevating the movable plate with respect to the fixed platen;
Connection means capable of arbitrarily connecting the fixed plate and the movable plate;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member Since the vertical casting apparatus for casting by supplying the molten metal is used, the holding furnace can be moved substantially horizontally without raising or lowering the holding furnace without increasing the overall height of the apparatus.

In the vertical casting apparatus according to the present invention,
A movable platen moving step of moving the movable plate away from the fixed platen and moving to a movable platen holding furnace moving position by the lifting actuator;
A movable plate fixing step of fixing the movable plate to the tie bar by the movable plate fixing means at the movable plate holding furnace moving position;
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A fixed platen moving step in which the fixed platen at the fixed platen fixed position is moved closer to the movable platen at the movable platen holding furnace moving position and moved to the fixed platen holding furnace moving position by the lifting actuator;
Thus, the holding furnace space is expanded upward, and at least the molten metal supply part of the holding furnace is carried in or out substantially horizontally, so that the holding furnace can be raised and lowered without increasing the overall height of the apparatus. The holding furnace can be moved substantially horizontally.

Furthermore, in another vertical casting apparatus according to the present invention,
A mold mounting plate connecting step of bringing the movable plate closer to the fixed plate by the lifting actuator and connecting the fixed plate and the movable plate by the connecting means;
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A movable platen moving step of moving the movable platen connected to the fixed platen by the connecting means to the ceiling plate by the lifting actuator and moving the movable platen to a movable platen holding furnace moving position;
Thus, the holding furnace space is expanded upward, and at least the molten metal supply part of the holding furnace is carried in or out substantially horizontally, so that the holding furnace can be raised and lowered without increasing the overall height of the apparatus. The holding furnace can be moved substantially horizontally.

It is a schematic side view of the vertical casting apparatus which concerns on Example 1 of this invention. It is A arrow directional view of FIG. It is a schematic side view explaining the process of the holding furnace moving method which concerns on Example 1 of this invention. It is a schematic side view of the vertical casting apparatus which concerns on Example 2 of this invention. It is a schematic side view explaining the process of the holding furnace moving method which concerns on Example 2 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  A vertical casting apparatus and a holding furnace moving method thereof according to Embodiment 1 of the present invention will be described with reference to FIGS.

  First, the configuration of the vertical casting apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The vertical casting apparatus 1 shown in FIG. 1 is in a mold open state. The lower mold 11 is attached to a mold mounting surface on the upper surface of the fixed platen 21, and four tie bars 22 are erected through the four corners of the fixed platen 21. Above the fixed platen 21, the upper die 12 is mounted on the die mounting surface on the lower surface of the movable platen 23 so as to be guided up and down by the four tie bars 22 and facing the lower die 11. Between the fixed platen 21 and the movable platen 23, an elevating actuator 24 that moves the movable platen 23 up and down with respect to the fixed platen 21 is disposed. In addition, the movable platen 23 and the upper die 12 in the mold closed (clamped) state in which the movable platen 23 is lowered with respect to the fixed platen 21 are shown by a two-dot chain line in FIG.

  In the first embodiment, the elevating actuator 24 is a hydraulic cylinder that is operated by supplying hydraulic oil. Although it is possible to fix the cylinder body (head) side and the piston rod (rod) side of the hydraulic cylinder to either the fixed platen 21 or the movable platen 23, the cylinder body of the hydraulic cylinder is used in the first embodiment. The (head) side is fixed to the upper surface of the fixed platen 21 and the piston rod (rod) side is fixed to the lower surface of the movable platen 23. The configuration in which the elevating actuator 24 is such a hydraulic cylinder is an example, and the type, fixing position, and fixing method of the elevating actuator 24 are not limited.

  A movable plate fixing means 25 capable of fixing the movable plate 23 to the tie bar 22 at an arbitrary position is disposed in a through portion of the tie bar 22 on the upper surface of the movable plate 23. In the first embodiment, the movable plate fixing means 25 is a general split nut mechanism in a horizontal casting apparatus (die casting machine) or the like. The split nut mechanism includes a ring-shaped uneven portion (not shown) processed on the outer peripheral surface of the tie bar 22 that matches the position adjustment range of the movable platen 23, and the same ring-shaped uneven portion on the inner peripheral surface. A nut body 25a that is processed and divided into two in the axial direction of the tie bar 22 and a drive means 25b for driving the nut body 25a are configured. The nut body 25a is configured to be arbitrarily switchable between a two-divided state and an integrated state by a driving means 25b such as a hydraulic cylinder. When the movable platen 23 is moved up and down, the nut body 25a is divided into two parts, and when the movable platen 23 is fixed to the tie bar 22, the nut body 25a is integrated.

  In the integrated state of the nut body 25a, linear movement of the tie bar 22 in the axial direction relative to the nut body 25a (and the movable platen 23) is prevented, but rotation about the axial direction of the tie bar 22 relative to the nut body 25a is prevented. Movement is allowed. The configuration of the movable plate fixing means 25 as such a split nut mechanism is an example, and the configuration of the movable plate fixing means 25 is not limited. In addition, a bush (not shown) is inserted into a through portion of the tie bar 22 inside the movable platen 23 in order to move the movable platen 23 guided by the tie bar 22. The split nut mechanism adopts a form in which a general screw portion is processed on the outer peripheral surface of the tie bar 22 instead of a ring-shaped uneven portion, and the same screw portion is processed on the inner peripheral surface of the nut body 25a. May be.

  On the other hand, a fixed platen first fixing means 26a for preventing the downward movement of the fixed platen 21 at the fixed platen fixing position is disposed at a through-hole portion of the tie bar 22 on the lower surface of the fixed platen 21. A fixed platen second fixing means 26b capable of arbitrarily selecting whether the fixed platen 21 is fixed to or released from the tie bar 22 is fixed to the through portion of the fixed platen. These fixed platen first fixing means 26a and fixed platen first fixing means 26b constitute a fixed platen fixing unit 26 that can arbitrarily select whether the fixed platen 21 is fixed to or released from the tie bar 22. The fixed platen fixing position is a relative fixed position of the fixed platen 21 to the tie bar 22 that does not need to be moved at all in a normal casting process.

  In the first embodiment, the fixed platen first fixing means 26a is a general fixing nut in a horizontal casting apparatus (die casting machine) or the like, and the fixed platen second fixing means 26b is a divided nut similar to the movable platen fixing means 25. The mechanism. The fixing nut, which is the first fixing plate fixing means 26a, has a female screw portion (not shown) threadedly engaged with a male screw portion (not shown) processed on the outer peripheral surface of the lower end of the tie bar 22. And is screwed into the lower end of the tie bar 22 to enlarge the outer diameter of the lower end. Thus, since the outer diameter of the lower end of the tie bar 22 is enlarged by the fixing nut, the downward movement of the stationary platen 21 is reliably prevented, and the upward movement is not prevented at all. In addition, since a detent (not shown) is provided between the tie bar 22 and the fixed nut, the rotational movement of the fixed nut around the axial direction of the tie bar 22 is prevented. The rotational movement around the axial direction of the fixing nut and tie bar 22 is allowed. Such a configuration using the fixed platen first fixing means 26a as the fixing nut and a configuration using the fixed platen second fixing means 26b as the split nut mechanism are examples, and the configuration of the fixed platen fixing means 26 is limited. is not. Further, as described later, a bush (not shown) is inserted into the penetration portion of the tie bar 22 inside the fixed platen 21 in the same manner as the movable platen 23, for the raising and lowering operation of the fixed platen 21 guided by the tie bar 22. Has been.

  The largest force acting on the fixed platen 21 is a reaction force of the mold clamping force at the time of mold clamping, and is a force for moving the fixed platen 21 downward. This reaction force is basically supported by the first fixing plate fixing means 26a on the lower surface of the fixed plate 21, so that the fixing plate 21 can be arbitrarily fixed to or released from the tie bar 22, and the upper surface of the fixed plate 21 can be selected arbitrarily. The fixed platen second fixing means 26b need only resist external forces caused by vibrations, earthquakes, or the like during operation of the vertical casting apparatus 1, which guides the fixed platen 21 to the tie bar 22 and moves it upward. Therefore, the fixing force for fixing the fixed platen 21 to the tie bar 22 by the fixed platen second fixing means 26b is sufficiently smaller than the fixing force for fixing the movable platen 23 to the tie bar 22 by the movable plate fixing means 25. Therefore, the split nut mechanism of the fixed platen second fixing means 26b can make the size of the nut body and the drive means sufficiently smaller than the split nut mechanism of the movable plate fixing means 25. As a result, it is also possible to incorporate the fixed platen second fixing means 26b together with the bush in the through portion of the tie bar 22 inside the fixed platen 21 (not shown). In this case, as can be easily understood from FIG. 2, a larger die mounting surface of the stationary platen 21 can be secured.

  On the other hand, the fixed platen first fixing means 26a on the lower surface of the fixed platen 21 is a split nut mechanism, the vertical load of the fixed platen 21, the upper die 12 and the lifting actuator 24, and the reaction force of the clamping force at the time of clamping. The fixing plate 21 may be configured to generate a fixing force that can resist the force to move the fixing plate 21 downward, so that the fixing plate second fixing means 26b on the upper surface of the fixing plate 21 is not required. is there. In this case, the fixed platen fixing means 26 is constituted only by the fixed platen first fixing means 26a.

  The fixed platen first fixing means 26 a of the fixed plate fixing means 26, that is, the lower end side of the tie bar 22 is connected to the base member 31. In the first embodiment, the base member 31 is a gantry structure assembled by welding or bolting using a structural steel material such as H steel, and is held below the stationary platen 21 by such a gantry structure. The furnace space 32 is formed. As shown in FIG. 2, the storage width LH of the holding furnace space 32 when the holding furnace 41 described later or the molten metal supply part 41a of the holding furnace 41 is stored can be secured sufficiently larger than the distance LT between tie bars. preferable. By forming the holding furnace space 32 in this way, the storage width when the holding furnace 41 or the molten metal supply part 41a of the holding furnace 41 is stored is not restricted by the distance LT between the tie bars.

  On the other hand, the base member 31 does not have a gantry structure, and is an embedded hardware foundationed on the floor or a floor-level foundation member fixed on the embedded hardware, and the lower end side of the tie bar 22 is extended to the floor surface. In addition, a configuration in which the lower end side of the tie bar 22 is connected to such a base member at the floor level is also possible. However, the formation of the holding furnace space 32 by extending to the floor surface on the lower end side of the tie bar 22 has an advantage that the base member 31 forming the gantry structure is not required, but the holding furnace 41 or the molten metal of the holding furnace 41 The storable width when the supply unit 41a is stored is limited by the inter-tie bar distance LT. As long as the molten metal supply part 41a of the holding furnace 41 is narrow with respect to the tie-bar distance LT and can be stored in the holding furnace space part 32, a large design change or special specification is required on the holding furnace 41 side. When it is necessary, it becomes a problem in cost. Further, when the replacement of the tie bar 22 is assumed, it is preferable that the length of the tie bar 22 pulled out upward is as short as possible. In view of these, it is preferable that the base member 31 has a gantry structure as in the first embodiment and the tie bar 22 is as short as possible.

  In the holding furnace space 32, the molten metal supply part 41 a of the holding furnace 41 is accommodated, and the upper end of the molten metal supply member 41 b (Stoke) standing upward from the molten metal supply part 41 a passes through the opening 21 a of the stationary platen 21. And connected to a gate (not shown) of the lower mold 11. A mold cavity (not shown) is formed between the clamped lower mold 11 and upper mold 12, and the mold cavity and the gate of the lower mold 11 are communicated. Then, an inert gas or the like is supplied from an inert gas supply device (not shown) to the space of the molten metal holding chamber (not shown) in the holding furnace 41 where the molten metal is held and has airtightness. When the pressure is supplied, the molten metal surface in the molten metal holding chamber is pressurized. As a result, the molten metal surface height is lowered, and the lower end of the molten metal is immersed in the molten metal (not shown) via the molten metal supply member 41b. It can be fed into the cavity. In the vertical casting apparatus 1, casting is performed in this way. As will be described later, the holding furnace 41 is guided by a horizontal movement mechanism (not shown) and a guide member (not shown) installed on the foundation so as to guide the holding furnace 41 to the holding furnace space 32. It is configured to be movable in a substantially horizontal direction.

  Next, the holding furnace moving method of the vertical casting apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. After the casting is finished, a product take-out means (not shown) is inserted between the lower mold 11 and the upper mold 12 which are opened by the lifting actuator 24, and the casting is held by the lower mold 11 or the upper mold 12. A state in which the product is carried out of the vertical casting apparatus 1 is referred to as a mold open state shown in FIG. In the normal casting process, the movable plate fixing means 25 is always in a state in which the fixed to the tie bar 22 is released. In the mold opening state shown in FIG. 1, the movable plate 23 is opened by the lifting actuator 24. The position is held at the limit position (the pressure of hydraulic oil supplied to the head side of the hydraulic cylinder is held). The fixed platen 21 is at a fixed platen fixing position, and is fixed to the tie bar 22 by a fixed platen fixing means 26 (a fixed platen first fixing unit 26a and a fixed platen second fixing unit 26b).

  Here, in the first embodiment, the mold opening limit position of the movable platen 23 is set as the movable platen holding furnace moving position. Then, the movable platen fixing means 25 is operated to fix the movable platen 23 to the tie bar 22 at the movable platen holding furnace moving position (movable platen fixing step), and at the fixed platen fixing position by the fixed platen second fixing unit 26b. Then, the fixing of the fixed platen 21 to the tie bar 22 is released (fixed platen moving preparation step). Since the force to move the stationary platen 21 downward, such as the stationary platen 21, the upper mold 12 and the lifting / lowering actuator 24, is supported by the first stationary platen 26a, the downward movement of the stationary platen 21 As described above, the movement is prevented.

  Next, the fixed platen 21 at the fixed platen fixed position is moved closer to the movable platen 23 at the movable platen holding furnace moving position (the mold opening limit position) by the lifting / lowering actuator 24, and the upper mold 12 and the lower mold 11 are closed. To the position to be moved (fixed platen moving step / FIG. 3A). Specifically, hydraulic oil may be supplied to the rod side of the lifting actuator 24 (hydraulic cylinder) and discharged from the head side to reduce the lifting actuator 24. In the first embodiment, the position of the stationary platen 21 shown in FIG. In this way, by moving (raising) the stationary platen 21, the holding furnace space 32 is expanded upward, and at the time of casting, the lower surface of the stationary platen 21 at the stationary platen holding furnace moving position and the molten metal of the holding furnace 41. A predetermined clearance (for example, α in FIG. 3A) is ensured between the upper end of the supply member 41b. In this case, even if the mold thickness in a state where the lower mold 11 and the upper mold 12 are combined is the maximum mold thickness that can be attached to the vertical casting apparatus 1, the mold opening limit position is set as the movable platen holding furnace moving position. The clearance α is preferably ensured.

  In this way, if a predetermined clearance α is secured between the lower surface of the stationary platen 21 and the upper end of the molten metal supply member 41b of the holding furnace 41, the position where the mold is closed as shown in FIG. It is not necessary to set the fixed plate holding furnace moving position of the plate 21, and similarly, it is not necessary to set the mold opening limit position in the normal casting process as the movable plate holding furnace moving position. In Example 1, the fixed platen 21 was moved (raised) to the fixed platen holding furnace moving position with the lower die 11 and the upper die 12 attached to the respective plates, but both molds were removed. In this state, the mold mounting surfaces of the fixed platen 21 and the movable platen 23 and the protrusions of the respective mold mounting surfaces (for example, the fixed platen second fixing means 26b on the upper surface of the fixed platen 21) are not in contact with each other. The fixed platen 21 may be moved (lifted) in a state (not shown) where a jig other than the mold is attached to the mold mounting surface of the fixed platen 21 or the movable platen 23. Thus, there is no big restriction | limiting in the setting of a movable plate holding furnace movement position and a fixed plate holding furnace movement position, and what is necessary is just to set suitably according to a condition.

  Then, after a predetermined clearance α is secured between the lower surface of the fixed platen 21 and the upper end of the molten metal supply member 41b of the holding furnace 41, the rod-side hydraulic pipe line of the lifting / lowering actuator 24 (hydraulic cylinder) is closed. Alternatively, by holding the supply pressure of hydraulic oil to the rod side, the fixed platen 21 is held at the fixed platen holding furnace moving position (fixed platen position holding step). After the fixed platen position holding step, as shown in FIG. 3 (b), a horizontal movement mechanism (not shown) is guided by a guide member (not shown) from the holding furnace space 32 expanded upward. ), It becomes possible to carry in and out by moving the holding furnace 41 substantially horizontally.

  Further, if the lifting / lowering stroke of the fixed platen 21 necessary for ensuring the predetermined clearance α is within the mold opening / closing stroke of the vertical casting apparatus 1, the vertical stroke is reflected in the overall height of the vertical casting apparatus 1. There is no need to let That is, the holding furnace 41 can be moved substantially horizontally without increasing the overall height of the vertical casting apparatus 1 and without raising and lowering the holding furnace 41. Furthermore, it is one of the features of the present invention that a lifting mechanism 24 is used without raising a dedicated lifting mechanism to raise the fixed platen 21.

  On the other hand, as shown in FIG. 3, in the first embodiment, the fixed platen 21 is held at the fixed platen holding furnace moving position by the lifting / lowering actuator 24. Therefore, in the meantime, even if there is a problem in holding the position of the fixed platen 21 due to a problem with the hydraulic circuit or hydraulic control of the lifting / lowering actuator 24, the safety is such that the downward movement of the fixed platen 21 can be prevented. It is preferred that the device is arranged. For example, the fixed platen second fixing unit 26b of the fixed platen fixing unit 26 is configured to generate a fixing force that can prevent the downward movement of the fixed platen 21, and the fixed platen second fixing unit 26b From the outer diameter of the tie bar 22, the fixed platen 21 is held at the fixed platen holding furnace moving position, or after the fixed platen position holding step, the tie bar 22 between the lower surface of the fixed platen 21 and the upper surface of the second fixed platen 26a. It is preferable to attach a mechanical stopper (not shown) configured in a two-divided cylindrical shape having a large inner diameter. With such a safety device, horizontal movement of the holding furnace 41, maintenance below the fixed platen 21, and the like can be performed more safely.

  Here, in the first embodiment, the method of moving the holding furnace from the mold open state shown in FIG. 1 has been described. However, when the holding furnace 41 is moved from the mold closed (clamped) state shown by the two-dot chain line in FIG. First, if the movable platen 23 is moved away from the fixed platen 21 by the lifting / lowering actuator 24 and moved to the movable platen holding furnace moving position (the mold opening limit position in the first embodiment), the movable platen moving step is performed. good.

  Further, compared with the molten metal forging method or the like, the low pressure casting method has a lower molten metal filling pressure and does not require a large mold clamping force. For this reason, the first embodiment has been described on the assumption that the lifting actuator 24 performs the mold opening / closing operation and the mold clamping operation. However, in recent low-pressure casting methods, a pressurizing pin or the like that pressurizes the molten metal in the mold cavity is driven by a driving means such as a hydraulic cylinder disposed on the upper surface of the movable plate 23 so that the molten metal is injected into the mold cavity. A casting method in which the molten metal is pressurized after filling is also attempted. In such a case, when the molten metal is filled, the pressure of the molten metal in the mold cavity is low, but a larger clamping force may be required when the molten metal is pressurized with a pressure pin or the like. Even in such a case, the movable platen fixed to the tie bar 22 at the die-closed (die-matching) position by forming the clamping cylinder coaxially with the movable platen fixing means 25 arranged on the upper surface of the movable platen 23. Based on the fixing means 25, the movable platen 23 can be pressed downward to generate a desired clamping force.

  Next, a vertical casting apparatus according to Example 2 of the present invention and a holding furnace moving method thereof will be described with reference to FIGS. The second embodiment differs from the first embodiment in that a ceiling board fixed to the tie bar and a connecting means that can arbitrarily connect the fixed board and the movable board are provided above the movable board, and the lifting actuator is movable. It is a point arranged between a board and a ceiling board. Further, the difference is that the movable plate fixing means becomes unnecessary. Since points other than these are basically the same as those in the first embodiment, the same reference numerals are used for the same configuration requirements as those in the first embodiment, and only differences from the first embodiment will be described.

  First, the configuration of a vertical casting apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. The vertical casting apparatus 100 shown in FIG. 4 is in the mold open state, and the movable platen 23 and the upper die 12 in the mold closed (clamped) state in which the movable platen 23 is lowered with respect to the fixed platen 21 are indicated by two-dot chain lines. ing. A ceiling board 61 is disposed above the movable board 23 and is fixed to the tie bar 22. Further, on the mold dividing surfaces of the lower mold 11 and the upper mold 12, connecting means 71 (not shown) for connecting the molds in a mold-matched state is arranged. In the second embodiment, the lower plate 11 and the upper die 12 are connected by the connecting means 71 to indirectly connect the fixed platen 21 and the movable platen 23. Unlike the first embodiment, the lifting / lowering actuator 24 is disposed between the movable board 23 and the ceiling board 61. As described above, the movable platen fixing means for fixing the movable platen 23 to the tie bar 22 is not provided.

  The arrangement of the ceiling board 61, the connecting means 71, and the lifting / lowering actuator 24 is different from that of the first embodiment in that the movable board fixing means is not provided. Other configurations are the same as those in the first embodiment. The same. Also in the second embodiment, the elevating actuator 24 is a hydraulic cylinder. In the second embodiment, the cylinder body side of the hydraulic cylinder is fixed to the lower surface of the ceiling panel 61, and the piston rod side is fixed to the upper surface of the movable panel 23. The configuration in which the elevating actuator 24 is such a hydraulic cylinder is an example, and the type, fixing position, and fixing method of the elevating actuator 24 are not limited.

  In order to simplify the explanation and the drawings, the connecting means 71 is arranged on the mold dividing surfaces of the lower mold 11 and the upper mold 12 and is configured to connect the molds in a mold-matched state. However, this configuration is an example, and the configuration of the coupling device 71 is not limited. For example, regardless of the presence or absence of the lower mold 11 and the upper mold 12, a T groove on the mold mounting surface of the stationary platen 21 and the movable platen 23 (the cross section forms an alphabetical “T” shape), a female screw, or a mold Molds for each of the fixed platen 21 and the movable platen 23 such as a connecting member attached to the die mounting surface using a clamp device for mounting, or a connecting member attached to the side surfaces of the fixed platen 21 and the movable platen 23. In order to avoid a protrusion on the mounting surface, a connecting part having a simple configuration may be used that is connected with a predetermined distance.

  Next, the holding furnace moving method of the vertical casting apparatus 100 according to the second embodiment of the present invention will be described with reference to FIG. After the casting is finished, a product take-out means (not shown) is inserted between the lower mold 11 and the upper mold 12 which are opened by the lifting actuator 24, and the casting is held by the lower mold 11 or the upper mold 12. A state where the product is carried out of the vertical casting apparatus 100 is referred to as a mold open state shown in FIG. In the mold opening state shown in FIG. 4, the movable platen 23 is held at the mold opening limit position by the lifting / lowering actuator 24 (the pressure of the hydraulic oil supplied to the rod side of the hydraulic cylinder is held). The fixed platen 21 is in a fixed platen fixing position and is fixed to the tie bar 22 by the fixed platen fixing means 26 (the fixed platen first fixing unit 26a and the fixed platen second fixing unit 26b). In the case of movement, the fixed platen second fixing means 26b fixes the fixed platen 21 to the tie bar 22 at an arbitrary timing from the mold open state shown in FIG. Is released (fixed platen preparation process).

  Here, also in the second embodiment, the mold opening limit position of the movable platen 23 is set as the movable platen holding furnace moving position. Then, as shown in FIG. 5 (a), the movable platen 23 (FIG. 4) at the movable platen holding furnace moving position is moved close to the fixed platen 21 at the fixed platen fixed position by the lifting / lowering actuator 24. 12 and the lower mold 11 are moved until the mold is closed. Then, the lower mold | type 11 and the upper mold | type 12 are connected with the connection means 71, and the fixed platen 21 and the movable platen 23 are connected indirectly (die mounting plate connection process). As described above, when the connecting means 71 is a connecting part having a simple configuration (not shown), the connecting means 71 is inserted between the boards after the movable platen 23 is brought close to the fixed platen 21. The fixed plate 21 and the movable plate 23 may be connected to each other by being fixed to the side of the plate.

  If the fixed platen moving preparation step is not completed after the die mounting platen connecting step, this is completed. If completed, as shown in FIG. 5B, the movable platen 23 connected to the fixed platen 21 by the connecting means 71 is moved close to the ceiling plate 61 by the lifting / lowering actuator 24, and the movable platen holding furnace moving position is reached. Move to the mold opening limit position (movable platen moving process). Specifically, hydraulic oil may be supplied to the rod side of the lifting actuator 24 (hydraulic cylinder) and discharged from the head side to reduce the lifting actuator 24. In the second embodiment, since the fixed platen 21 and the movable platen 23 are connected by the connecting means 71, the fixed platen 21 can be moved (lifted) by moving (raising) the movable platen 23. When the movable platen 23 is moved (raised) to the movable platen holding furnace moving position, the position of the fixed platen 21 (fixed platen holding furnace moving position) is separated from the movable plate holding furnace moving position by a predetermined distance by the connecting means 71. The distance between the fixed platen 21 and the movable platen 23 is determined.

  In this way, by moving (raising) the stationary platen 21, the holding furnace space 32 is expanded upward, and at the time of casting, the lower surface of the stationary platen 21 at the stationary platen holding furnace moving position and the molten metal of the holding furnace 41. A predetermined clearance (for example, α in FIG. 5B) is secured between the upper end of the supply member 41b. When the connecting means 71 is arranged on the mold dividing surfaces of the lower mold 11 and the upper mold 12 as in the second embodiment, the mold thickness in a state where the lower mold 11 and the upper mold 12 are combined is vertical casting. Similar to the first embodiment, it is preferable to secure a predetermined clearance α by using the mold opening limit position as the movable platen holding furnace moving position even with the maximum mold thickness to which the apparatus 1 can be attached.

  On the other hand, if a predetermined clearance α is secured between the lower surface of the stationary platen 21 and the upper end of the molten metal supply member 41b of the holding furnace 41, the mold opening limit position of the movable platen 23 shown in FIG. It is not necessary to use the board holding furnace movement position. Further, as described above, the fixed platen 21 and the movable platen 23 are connected by using the connecting means 71 as a simple connecting component, and the fixed platen holding furnace moving position of the fixed platen 21 is set, so The clearance α may be secured. Thus, also in the present Example 2, there is no big restriction | limiting in the setting of a movable platen holding furnace movement position and a fixed platen holding furnace movement position, and what is necessary is just to set suitably according to a condition.

  Then, after a predetermined clearance α is secured between the lower surface of the fixed platen 21 and the upper end of the molten metal supply member 41b of the holding furnace 41, the rod-side hydraulic pipe line of the lifting / lowering actuator 24 (hydraulic cylinder) is closed. Alternatively, by holding the supply pressure of hydraulic oil to the rod side, the fixed platen 21 (movable platen 23) is held at the fixed platen holding furnace moving position (movable platen holding furnace moving position) (fixed platen position holding). Process). After the fixed platen position holding step, as shown in FIG. 5C, the holding furnace 41 is guided from a holding furnace space 32 expanded upward to a guide member (not shown), and a horizontal movement mechanism is provided. (Not shown) can be moved substantially horizontally.

  Further, if the lifting / lowering stroke of the fixed platen 21 necessary for ensuring the predetermined clearance α is within the mold opening / closing stroke of the vertical casting apparatus 100, the vertical stroke is reflected in the overall height of the vertical casting apparatus 100. It is the same as that of the first embodiment in that it is not necessary to do this.

  On the other hand, as shown in FIG. 5, in the second embodiment, the movable platen 23 and the fixed platen 21 are held at the movable platen holding furnace moving position and the fixed platen holding furnace moving position by the lifting / lowering actuator 24. Therefore, in the meantime, even if there is a problem in holding the position of the fixed platen 21 due to a problem with the hydraulic circuit or hydraulic control of the lifting / lowering actuator 24, the safety is such that the downward movement of the fixed platen 21 can be prevented. It is preferred that the device is arranged. For example, the fixed platen second fixing unit 26b of the fixed platen fixing unit 26 is configured to generate a fixing force that can prevent the downward movement of the fixed platen 21, and the fixed platen second fixing unit 26b From the outer diameter of the tie bar 22, the fixed platen 21 is held at the fixed platen holding furnace moving position, or after the fixed platen position holding step, the tie bar 22 between the lower surface of the fixed platen 21 and the upper surface of the second fixed platen 26a. It is preferable to attach a mechanical stopper (not shown) configured in a two-divided cylindrical shape having a large inner diameter. Similar to the first embodiment, such a safety device enables the horizontal movement of the holding furnace 41 and the maintenance below the fixed platen 21 to be performed more safely.

  Further, in the vertical casting long land 100 of the second embodiment, when a larger clamping force is required, the movable platen fixing means 25 is disposed in the penetrating portion of the tie bar 22 on the upper surface of the movable platen 23 as in the first embodiment. Furthermore, the mold clamping cylinder may be configured coaxially with the movable plate fixing means 25. In addition, a toggle type mold clamping mechanism may be arranged between the movable board 23 and the ceiling board 61 instead of the lifting / lowering actuator 24 to perform the mold opening / closing operation and the mold clamping operation.

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, the configuration of the vertical casting apparatus 1 of the first embodiment is not changed, and a ceiling panel that is disposed above the movable platen 23 and fixed to the tie bar 22 is disposed as in the vertical casting apparatus 100 of the second embodiment. May be. Further, the ceiling board 61 of the vertical casting apparatus 100 of the second embodiment is configured as a connecting part having a simple shape in which each tie bar 22 is connected at the upper end and a fixing seat for the elevating actuator 24 is provided. Also good.

DESCRIPTION OF SYMBOLS 1,100 Vertical casting apparatus 11 Lower mold 12 Upper mold 21 Fixed plate 22 Tie bar 23 Movable plate 24 Lifting actuator 25 Movable plate fixing means 26 Fixed plate fixing means 26a Fixed plate first fixing means 26b Fixed plate second fixing means 31 Base member 32 Holding furnace space 41 Holding furnace 41a Molten metal supply part 41b Molten metal supply member 61 Ceiling board 71 Connecting means

Claims (8)

A fixed plate to which the lower mold can be attached;
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
An elevator actuator disposed between the fixed plate and the movable plate, for raising and lowering one plate of the movable plate or the fixed plate with respect to the other plate;
Movable plate fixing means capable of fixing the movable plate to the tie bar at an arbitrary position;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member A vertical casting machine that casts molten metal. The fixed platen fixing means is a fixed platen first fixing unit for preventing downward movement of the fixed platen at the fixed platen fixing position;
A fixing plate second fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at the fixing plate fixing position;
The vertical casting apparatus according to claim 1, comprising:   The vertical casting apparatus according to claim 1 or 2, wherein a lower end side of the tie bar is connected to a foundation member. A fixed plate to which the lower mold can be attached;
Four tie bars installed vertically through the four corners of the fixed plate;
Above the fixed platen, a movable platen that is guided by the tie bar and can be moved up and down, and an upper die is attached to face the lower die,
A ceiling board disposed above the movable board and fixed to the tie bar;
An elevating actuator disposed between the movable platen and the ceiling plate and elevating the movable plate with respect to the fixed platen;
Connection means capable of arbitrarily connecting the fixed plate and the movable plate;
A fixing plate fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at a fixing plate fixing position;
At the fixed platen fixing position, below the fixed platen fixed to the tie bar, a holding furnace space part capable of storing at least a molten metal supply part of the holding furnace,
With
From at least the molten metal supply portion of the holding furnace, which is housed in the holding furnace space, to a mold cavity formed between the lower mold and the upper mold, which are clamped, via a molten metal supply member A vertical casting machine that casts molten metal. The fixed platen fixing means is a fixed platen first fixing unit for preventing downward movement of the fixed platen at the fixed platen fixing position;
A fixing plate second fixing means capable of optionally selecting fixing / releasing of the fixing plate to / from the tie bar at the fixing plate fixing position;
The vertical casting apparatus according to claim 4, comprising:   The vertical casting apparatus according to claim 4 or 5, wherein a lower end side of the tie bar is connected to a base member. A movable platen moving step of moving the movable plate away from the fixed platen and moving to a movable platen holding furnace moving position by the lifting actuator;
A movable plate fixing step of fixing the movable plate to the tie bar by the movable plate fixing means at the movable plate holding furnace moving position;
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A fixed platen moving step in which the fixed platen at the fixed platen fixed position is moved closer to the movable platen at the movable platen holding furnace moving position and moved to the fixed platen holding furnace moving position by the lifting actuator;
The vertical shape according to any one of claims 1 to 3, wherein the holding furnace space is expanded upward, and at least the molten metal supply part of the holding furnace is carried in or out substantially horizontally. A method for moving a holding furnace of a casting apparatus. A mold mounting plate connecting step of bringing the movable plate closer to the fixed plate by the lifting actuator and connecting the fixed plate and the movable plate by the connecting means;
A fixed platen movement preparation step for releasing the fixation of the fixed plate to the tie bar by the fixed plate fixing means at the fixed plate fixing position;
A movable platen moving step of moving the movable platen connected to the fixed platen by the connecting means to the ceiling plate by the lifting actuator and moving the movable platen to a movable platen holding furnace moving position;
The vertical type according to any one of claims 4 to 6, wherein the holding furnace space is expanded upward, and at least the molten metal supply part of the holding furnace is carried in or out substantially horizontally. A method for moving a holding furnace of a casting apparatus.

Images