JP2670286B2 - Pouring controller and pouring control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pouring control device and a pouring control method attached to a vertical frameless casting line or the like.

(Prior Art) For example, in a vertical frameless casting line A, a molding machine 1 configured to mold a frameless mold M as shown in FIG.
And the frameless molds M, M, which are sequentially molded by the molding machine 1.
Is provided with a conveying means 2 for conveying in a connected state, and a pouring device 3 provided at a pouring position in the middle of the conveying means 2. The pouring position of the pouring device 3 is predetermined. It is customary. However, even when molding the same product, the mold thickness T of the frameless mold M molded by the molding machine 1 depends on various conditions at the time of molding, for example, changes in sand properties or the amount of sand charged into the molding machine. Of the pouring position will be shifted in the front-rear direction from a place that is not constant due to a variation or the like. Further, when a plurality of types of frameless molds M having different mold thicknesses T are molded by the molding machine 1, the pouring position is naturally shifted in the front-back direction in the transport direction.

To cope with the displacement of the pouring position as described above, it is necessary to move the pouring device along the transport line, and various devices have been conventionally devised. For example, JP-A-55-153664
As disclosed in the publication, the position of the sprue formed on the mating surface of the frameless mold is detected by a sensor or the like, and the pouring position or the position of the pouring spout in the pouring device is made to correspond to the position of the sprue. It has already been proposed to correct pouring to ensure reliable pouring.

(Problems to be Solved by the Invention) In a moldless frame casting line as exemplified in the above-mentioned prior art, when a plurality of types of molds having different mold thicknesses are continuously molded by a molding machine, molding is performed depending on the type of mold. It is customary for there to be a difference between the time required for pouring and the time required for pouring. For example, while the time required to mold a cylinder block casting mold is 20 seconds, the time required to mold a knuckle casting mold is 10 seconds, and the casting time for the cylinder block casting mold is The time required for hot water is 20 seconds, while the time required for pouring the molten metal into the knuckle casting mold is 10 seconds.

Therefore, when the casting machine is casting the knuckle casting mold while pouring the molten metal into the cylinder block casting mold, the molding operation by the molding machine may be completed much faster. As a result, there arises a problem that the timing for carrying the mold is made during the operation of pouring the molten metal into the cylinder block casting mold. In such a case, as in the above-mentioned known example, when the position of the pouring device or the pouring port of the pouring device is corrected according to the position of the pouring port of the mold, the position of the pouring port during pouring work Since it is impossible to move the mold, it is difficult to deal with this situation, and the mold must be conveyed after the completion of the pouring work. Therefore, the cycle time in the casting line is unavoidably lengthened due to the loss time generated during that time, which has been a major obstacle in improving work efficiency.

The present invention has been made in view of the above points, by allowing the pouring port and the mold to move synchronously even during the pouring work into the mold, while ensuring reliable pouring, the casting line The purpose is to shorten the cycle time in.

(Means for Solving Problems) In the invention of claim 1, as means for solving the above problems, a molding machine that molds a mold, and a conveying means that conveys a pitch of the mold molded by the molding machine. And a pouring device for pouring molten metal into the mold when the conveying means is stopped, wherein the pouring device is movable in synchronization with the mold and molding by the molding machine When the pouring time by the pouring device is longer than the time, a connecting means for connecting the mold and the pouring device is additionally provided.

In a second aspect of the invention, as means for solving the above-mentioned problems, a mold molded by a molding machine is pitch-conveyed, and when the conveyance of the mold is stopped, molten metal is poured into the mold by a pouring device. In doing so, when the pouring time by the pouring device is longer than the molding time of the mold, the mold and the pouring device are connected and moved synchronously.

(Operation) In the invention of claim 1 or 2, the following actions are obtained by the above means.

That is, while conveying the mold molded by the molding machine with pitch, in pouring the molten metal by the pouring device to the mold when the conveyance of the mold is stopped, by the pouring device compared to the molding time of the mold When the pouring time is long, the mold and the pouring device are connected and moved synchronously, so even if there is a difference between the time required for molding and the time required for pouring In addition to being able to perform pouring, it is possible to carry the mold regardless of the pouring work, and the cycle time in the casting line can be shortened.

(Examples) Hereinafter, some preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 to 3 show a pouring controller according to Embodiment 1 of the present invention.

As shown in FIG. 6, the molten metal pouring control apparatus of the present embodiment includes a molding machine 1 configured to mold a frameless mold M, and the molding machine 1
For controlling the operation of the pouring device 3 attached to the vertical frameless casting line A provided with the conveyor means 2 for conveying the frameless molds M, M ... It is a thing.

The molding machine 1 is installed at the most upstream position of the casting line A, and the sand supplied from the hopper 5 is clamped between a front mold and a rear mold (not shown) for molding. It is configured so that the frameless mold M can be molded. Incidentally, unframed mold is molding by the molding machine 1 are two types of M ₂ as for M ₁ and the knuckle casting one for cylinder block casting, unframed mold of the mold M ₁ for cylinder block casting The thickness T ₁ is about twice the mold thickness T ₂ of the frameless mold M ₂ for knuckle casting (ie T ₁ = 50).
0mm, T ₂ = 250mm), frameless mold for cylinder block casting
The time t ₁ required to mold M ₁ is also about twice as long as the time t ₂ required to mold the frameless mold M ₂ for knuckle casting (that is, t ₂ = 20 seconds, t ₂ = 10). Seconds).

The pouring device 3 is provided at a pouring position on the way of the conveying means 2, and is configured to pouring the molten metal into a spout 4 formed between the adjacent frameless molds M, M.

As shown in FIG. 3, the pouring device 3 includes a pair of crucibles 6, 6 in which molten metal is stored, and pouring between the crucibles 6, 6 with a slight downward slope toward the casting line A side. A gutter 7 is provided. The crucibles 6 and 6 are provided with tilting devices 8 and 8, respectively, and are configured so that the molten metal in the crucibles 6 and 6 can be supplied to the pouring trough 7 by the operation of the tilting devices 8 and 8. ing.

The pouring port 9 at the tip of the pouring gutter 7 is adapted to face above the pouring port 4 between the frameless molds M, which are pitch-conveyed by the conveying means 2 on the casting line A. by differences in mold thickness T of the unframed mold M that are molding by machine 1, arranged in the said reference position P ₀ as a reference distance L from the reference position P ₀ to the pouring port 9 of Chuyutoi 7 to the pouring port 9 Since there is a difference between the total mold thickness ΣT of the frameless molds M, M, and the positional relationship between the pouring device 3 and the spout 4 to be poured may be displaced, The pouring gutter 7 is swingable in the horizontal direction in order to cope with the deviation. The pouring time by the pouring device 3 also differs depending on the type of the target frameless mold M, and for example, the pouring time into the cavity formed by the frameless molds M ₁ and M ₁ for silida block casting. t ₁ ′ is the pouring time into the cavity formed by the frameless molds M ₂ and M ₂ for knuckle casting
It is supposed to be about twice t ₂ ′ (that is, t ₁ ′ = t = 20 seconds,
t ₂ ′ = t ₂ = 10 seconds).

That is, as shown in FIG. 1, the pouring gutter 7 is rotatably supported by a bearing 11 attached to the upper end of a column 10 standing between crucibles 6 of the pouring device 3. It has a vertical rocking shaft 12, and a rocking motor 13 that is reversibly driven by hydraulic pressure is connected to the lower end of the rocking shaft 12. Further, the swing motor 13 is provided with a rotary encoder 14 for controlling the rotation amount of the swing motor 13. That is, the pouring gutter 7 is a rotary encoder 14
By reversibly rotating the swinging motor 13 by the rotation amount set by, the pouring port 9 is swung so as to correspond to the pouring port 4 of the frameless mold M. That is, in the present embodiment, the pouring position control means 15 for setting the position of the pouring port 9 of the pouring spout 7 by the swing motor 13 and the rotary encoder 14 so as to correspond to the pouring port 4 of the frameless mold M is provided. It is composed.

Further, a pair of connecting arms 16 and 16 are connected to one side surface of the conveying means 2 in the casting line A at positions sandwiching the pouring device 3 in the front and rear of the conveying direction, and upper ends of the connecting arms 16 and 16 are connected. The parts are exposed above the frameless molds M, M ... A plate-shaped guide bar 17 is provided between the upper ends of the connecting arms 16 (see FIG. 3).

The guide bar 17 is provided with a movable table 19 having rollers 18, 18 ... Guided to the upper and lower end surfaces of the guide bar 17. A lower end portion of the movable table 19 and the pouring gutter 7 are connected via a link 20 so as to be synchronously movable. Reference numeral 21 is a connecting bar projecting from the side surface of the pouring gutter 7.
With this structure, the pouring gutter 7 is synchronized with the movable table 19 which moves along the guide bar 17 in the transport direction of the frameless mold M, and the pouring gutter 7 has an arrow P (see FIG. 3) about the swing shaft 12. It is supposed to be horizontally rocked in the (see) direction. At this time, the difference in the movement miracle between the linear movement of the movable table 19 and the arc swing of the pouring gutter 7 is absorbed by the movement of the link 20. That is, in the present embodiment, the movable table 19 and the link 20 constitute the synchronous moving means 22 that acts to synchronize the movement of the pouring spout 7 (in other words, the pouring spout 9) and the frameless mold M. It is to be done.

Further, the movable table 19 is provided with a lock cylinder 23 that faces the side surface of the guide bar 17, and the tip of the piston rod 23a of the lock cylinder 23 has the above-mentioned structure when the piston rod 23a is extended. A suction member 24 is provided on the side surface of the guide bar 17 to be pressed and sucked. Sign
Reference numeral 25 is a bracket for fixing the lock cylinder 23 to the movable table 19. That is, the lock cylinder 23
The movable base 19 is connected to the guide bar 17 in a locked state by pressing and adsorbing the suction member 24 to the side surface of the guide bar 17 by the extension operation of. That is, in the present embodiment, the lock cylinder 23 and the suction member 24 constitute the movable table 19 that constitutes the synchronous moving means 22.
And a guide bar 17 (in other words, the transporting means 2 of the frameless mold M) are linked with each other so as to be detachably connected.
26 are to be constructed.

Next, the operation of the pouring control device according to the present embodiment will be described.

The frameless molds M, M, which have been sequentially molded by the molding machine 1, are arranged on the conveying means 2, but the mold thickness T is different depending on the type of the frameless mold M molded by the molding machine 1. to the reference distance L and the reference position P ₀ from the pouring port unframed mold M aligned until 9 from the reference position P ₀ to the pouring port 9 of Chuyutoi 7, and the total mold thickness ΣT of M · · · (See FIG. 6), there is a case where the positional relationship between the pouring port 9 of the pouring gutter 7 and the pouring port 4 to be poured may be displaced. Pouring gutter 7
The swing motor 13 constituting the pouring position control means 15 is swung by the direction and swing angle instructed based on the signal from the rotary encoder 14. After the swing of the pouring gutter 7,
The rocking motor 13 is locked so that its state can be maintained by a switching operation of a valve (not shown) that controls the hydraulic pressure supplied to the rocking motor 13.

Under this condition, from the pouring gutter 9 of the pouring gutter 7 to the frameless mold M,
The pouring to the sprue 4 between M is started. Thereafter, the lock cylinder 23 constituting the linking means 26 is extended and actuated, and the suction member 24 at the tip of the piston rod 23a of the lock cylinder 23 is pressure-contacted to the side surface of the guide bar 17 to form the synchronous movement means 22. The movable base 19 and the guide bar 17 are connected to each other, and then the swing motor 13 is brought into a rotation free state by the switching operation of the valve that controls the hydraulic pressure supplied to the swing motor 13. In this state, the pouring by the pouring gutter 7 is continued, but the frameless mold made by the molding machine 1 before the start of pouring is the knuckle casting mold M ₂ , If the template is a template M ₁ for cylinder block casting, pouring time to the cylinder block casting mold M ₁ t ₁ '
Before the end of (= 20 seconds), the molding of the knuckle casting mold M ₂ (molding time t ₂ = 10 seconds) is completed.

In this case, the sprue 4 of the mold M ₁ for cylinder block casting
The frameless molds M, M ... Then, the connecting arms 16, 16 and the guide bar 17 move in the carrying direction as the carrying means 2 moves forward, and the movable table 19 connected to the guide bar 17 via the lock cylinder 23 moves in the carrying direction. Moving. Then, the pouring gutter 7 connected to the movable table 19 via the link 20 is swung in the transport direction (the arrow P direction) about the swing shaft 12 as the movable table 19 moves.
Therefore, the pouring spout 7 and the frameless mold M ₁ are moved in synchronization with each other, and the pouring port 9 of the pouring spout 7 and the spout 4 of the frameless mold M ₁ are moved in a corresponding state to each other. The pouring work can be continued even during the transportation of M, M ....

After that, when the transportation of the frameless molds M, M ... By the transportation means 2 and the pouring of the cylinder block casting mold M ₁ by the pouring device 3 are completed, the hydraulic pressure supplied to the swing motor 13 is changed. The rocking motor 13 is locked by the switching operation of the valve to be controlled, the lock state of the movable base 19 and the guide bar 17 is released by the contraction operation of the locking cylinder 23, and then the conveying means 2 is moved backward. Prepare for the next molding and pouring. A frameless mold is used when the transporting means 2 is retracted.
M, M ... are not transported.

In addition, when the frameless mold to be molded by the molding machine 1 is the cylinder block casting mold M ₁ , when the mold being poured is the cylinder block casting mold M ₁ , the molding time t _{Since 1} and pouring time t ₁ ′ are equal,
It is not necessary to convey the frameless molds M, M ... during the pouring work, the pouring gutter 7 is maintained in the stopped state at the pouring position, and the pouring mold is used for knuckle casting. In the case of the mold M ₂ , since the pouring time t ₂ ′ is shorter than the molding time t ₁ , the frameless molds M, M
・ Transportation is not required.

As described above, according to this embodiment, the molding time is shorter than the pouring time, and when the mold is transported during the pouring operation, the pouring gutter 7 and the movable link connected via the link 20 are used. By connecting the table 19 to the guide bar 17 via the lock cylinder 22, the frameless mold M and the pouring gutter 7 can be moved synchronously, and pouring can be continued even during the mold transfer. Therefore, it is possible to secure a reliable pouring work and to improve the efficiency of the casting cycle in the casting line A.

In the above-mentioned embodiment, only the pouring gutter 7 can be oscillated in synchronism with the mold transfer, but it goes without saying that the mold transfer and the entire pouring device can be moved synchronously. Is.

Embodiment 2 FIGS. 4 and 5 show a pouring controller according to Embodiment 2 of the present invention.

In the present embodiment, the pouring position control means 15 has the same structure as that of the first embodiment, but the synchronous moving means 22 and the linking means 26 have a different structure from that of the first embodiment. Has been done.

The synchronous moving means 22 in this embodiment is a guide rail on the casting line A and extending parallel to the mold conveying direction.
Inverted L-shaped movable base 29 with rollers 28 guided by 27
And guide locks 30 and 3 which are provided at the lower end of the movable table 29 so as to project in a direction orthogonal to the mold conveying direction and which are loosely and loosely fitted to a bracket 31 attached to the pouring gutter 7.
0, so that the pouring spout 7 can be horizontally swung in the direction of arrow P (see FIG. 5) about the swing shaft 12 along with the movable table 29 that moves along the guide rail 27. Has been In the case of the present embodiment, the difference in the miracle of movement between the linear movement of the movable table 19 and the arc swing of the pouring gutter 7 is determined by
It is adapted to be absorbed by sliding the brackets 30 and 30 on the bracket 31.

Further, the linking means 26 in this embodiment is the movable table 29.
Of the lock cylinder 32 provided downward (in other words, toward the upper surface of the frameless mold M) with respect to the horizontal portion of the lock cylinder 32, and the spike pin 33 provided at the tip of the piston rod 32a of the lock cylinder 32. By extending the spike pin 33 at the tip of the piston rod 32a to the upper surface of the frameless mold M by the extension operation of the locking cylinder 32, the movable base 29 and the frameless mold M which constitute the synchronous moving means 22 are connected. It is possible to hurry.

That is, in the case of the present embodiment, when the mold is conveyed by the forward movement of the conveying means 2 while the pouring from the pouring port 9 of the pouring gutter 7 to the pouring port 4 is being performed, the lock cylinder 32 is used.
By extending the spike pin 33 to the upper surface of the frameless mold M so that the pouring gutter 7 and the frameless mold M can be moved synchronously via the synchronous movement means 22. Gutter 7
Is horizontally oscillated in synchronism with the transfer of the mold, so that it is possible to secure a reliable pouring work and to improve the efficiency of the casting cycle in the casting line A.

The present invention is not limited to the configuration of the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

(Effects of the Invention) As described above, according to the invention of claim 1 or 2, while the molds molded by the molding machine are conveyed by the pitch, the pouring device for the molds when the conveyance of the molds is stopped. When pouring the molten metal, when the pouring time by the pouring device is longer than the molding time of the mold, the mold and the pouring device are connected and moved synchronously. Even if there is a difference between the time and the time required for pouring, reliable pouring can be performed, and molds can be transferred regardless of the pouring work, and the cycle time on the transfer line can be shortened. There is an excellent effect that you can.

[Brief description of the drawings]

1 is a side view showing a pouring control device according to a first embodiment of the present invention, FIG. 2 is a front view of the pouring control device shown in FIG. 1,
FIG. 3 is a plan view of the pouring control device shown in FIG. 1, and FIG. 4 is a side view showing the pouring control device according to Embodiment 2 of the present invention.
FIG. 5 is a plan view of the pouring controller shown in FIG. 4, and FIG. 6 is an overall plan view of a general vertical frameless casting line. 2 …… Conveying means 3 …… Pouring device 4 …… Mouth pouring 9 …… Pouring hole 15 …… Pouring position control means 22 …… Synchronous moving means 26 …… Coupling means A …… Casting line M …… Molding mold

Claims (2)

(57) [Claims] 1. A molding machine for molding a mold, a conveying means for conveying a mold produced by the molding machine with a pitch, and a pouring device for pouring molten metal into the mold when the conveying means is stopped. The mold and the pouring device when the pouring time by the pouring device is longer than the molding time by the molding machine while making the pouring device synchronously movable with respect to the mold. A pouring control device, characterized in that it is provided with a linking means for connecting the above. 2. When the molds molded by a molding machine are conveyed by a pitch and the molten metal is poured into the molds by a pouring device when the conveyance of the molds is stopped, the pouring is performed in comparison with the molding time of the molds. A pouring control method characterized in that when the pouring time by the pouring device is long, the mold and the pouring device are connected and moved synchronously.