JPH01254375A - Casting system - Google Patents

Abstract

PURPOSE:To prevent the positional dislocation in pouring a molten metal by respectively arranging the detection means of the end face of a mold and that of a mold feeding out mechanism and detecting the individual mold frame thickness based on the count value of the electric signal corresponding to the movement of the mold feeding out mechanism. CONSTITUTION:A mold transfer device 53 and automatic molten metal pouring device 57 are arranged for a molding device 51. The photoelectric cell B1, B1' for light projection and light receiving are provided as the end face detection means of a mold and a reflection type photoelectric cell B2 is arranged as the end face detection means of a mold feeding out mechanism. The frame thickness in the transfer direction of the mold molded in order by the molding device 51 is operated as the count value of the electric signal based on the signal respectively output from the photoelectric cells B1', B2 and a pulse encoder 209 and the elastic deformation of the cast frame at the molding time is corrected. The positioning precision of the cast frame deformed at the molding time is thus improved, so the positional dislocation of the cast frame and automatic molten metal pouring device at the pouring time is surely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to casting systems, and more particularly to, for example:
The present invention relates to a casting system for casting cast iron, cast steel, aluminum, etc., which includes a frameless modeling device and a conveying device that receives a group of molds formed by the frameless modeling device and intermittently transports them.

Individual J As is well known, in casting systems for casting cast iron, cast steel, aluminum, etc., the working environment in which these systems are installed is extremely poor and even dangerous for workers. That is, for example, when driving the system, when pouring molten metal using an automatic enema device into each mold of a group of molds that are formed by a molding device and transported intermittently by a transport device, There is a risk of problems such as high-temperature molten metal overflowing around the mold from the automatic pouring device, so it is important to prevent such problems from occurring to avoid harm to workers. It is said that Therefore, in order to prevent the occurrence of such problems, various measures have been conventionally taken. The outline of the various measures mentioned above is that positioning control is performed to prevent misalignment between the spout of each of the molds that are intermittently transported by the transport device and the tap of the automatic pouring device. They have one thing in common. The above-mentioned measures include a method of performing the positioning control described above by detecting the frame thickness of each mold formed by a molding device, and a method of performing positioning control as described above by detecting the frame thickness of each mold molded by a molding device, and a method of performing the positioning control described above by detecting the frame thickness of each mold molded by a molding device, and a method of performing the positioning control described above by detecting the frame thickness of each mold molded by a molding device. The positioning control method is broadly divided into a method in which the positioning control is performed by controlling the movement of the automatic pouring device along the conveying device based on the detection and the detection of the tap outlet of the automatic pouring device.

To explain in more detail the method of detecting the frame thickness of each mold formed by the molding device, for example, the already well-known CO
There is a method of directly detecting the frame thickness of each mold using an imaging device such as a D-camera that has a measurement area of a certain width or more, and a pulse encoder that detects the amount of movement of the pusher that makes up the modeling device. There is also a method of indirectly detecting the frame thickness of each mold from the detected movement amount. The latter method of indirectly detecting the frame thickness of each mold using a pulse encoder is based on the pusher and the first mold integrally attached to the pusher, and This is done by detecting the amount of movement of the pusher during mold production by counting the electronic signals output from the pulse encoder in collaboration with the second mold that is provided at a predetermined position on the side so that it can move in and out. It has become. That is, a chain mechanism that transmits power to the pusher, which is reciprocated in a substantially linear direction by a guide mechanism, is wound around a pulse encoder, and when molding, the pulse encoder is adjusted according to the amount of rotational movement of the chain mechanism. After counting the square wave pulse signals output from the encoder, the counted values are subjected to predetermined signal processing to measure the frame thickness of each mold.

By the way, in the conventional casting system having the above-mentioned configuration, as described above, the amount of movement of the pusher and the first mold is detected during the M mold making, and the detected amount of movement is calculated for each individual mold. However, with this method of measuring mold flask thickness, the thickness of the mold flask after molding is measured rather than the thickness of the mold flask at the time of molding. The frame thickness of the mold at the time it is sent from +21 to the conveying device is approximately 0.5 to 2 mm larger, so even for the same mold, the frame thickness at the time of measurement and the frame thickness at the time of pouring are different. An error occurs. In this type of casting system, from the viewpoint of the size of the conveyor, the stability of the mold conveyed by the conveyor, etc., there is some variation depending on the frame thickness of the mold, but if If the pouring point is set downstream of 20 molds from
In other words, when forming a mold, the above-mentioned butcher and the first mold and the second mold work together to pour the molding sand into the molding sand. Squeeze pressure must be applied, but if this squeeze pressure is too weak, the shape will collapse, and if the squeeze pressure is too large, the properties of the foundry sand will deteriorate, no matter how good the quality of foundry sand is used. Since the plastic deformation region shifts to the elastic deformation region, when the squeeze pressure is released, the thickness of the mold frame expands due to the elasticity of the foundry sand.

Therefore, as a countermeasure to eliminate such problems, the temperature, humidity, etc. of the atmosphere and the molding sand are measured when the system is operating, and the squeeze pressure is variably adjusted according to the measurement results to make the molding sand more elastic. A method was considered to prevent the transition to the deformation region. However, due to the work environment and other factors, it has been impossible to implement the above method in reality.

Therefore, if the conventional method of measuring mold flask thickness as described above is adopted, not only is it impossible to measure the mold flask thickness more accurately, but also it is difficult to measure the flask thickness of the mold more accurately. It was actually difficult to control the hot water device so as not to misalign it with the spout.

Therefore, the present invention has been devised in view of the above, and its purpose is to eliminate errors in measuring the thickness of the mold frame caused by the elastic deformation of molding sand, thereby improving the accuracy of each individual mold during pouring. It is an object of the present invention to provide a casting system that can be used to control the spout and the spout of an automatic pouring device so that the spout is not misaligned.

The above objects are achieved by a modeling apparatus according to the present invention. In summary, the present invention provides a molding device that forms molds and sequentially sends them out, a conveyance device that receives a group of molds sent out from the molding device and conveys them intermittently, and a mold that is conveyed by the conveyance device. In a casting system equipped with an automatic pouring device that sequentially pours metal into each mold forming a mold group, a guide mechanism extending substantially linearly and a reciprocating movement within the guide mechanism are provided. a mold delivery mechanism formed in the guide mechanism; a positioning member that can freely move in and out of the guide mechanism at a predetermined position and cooperates with the mold delivery mechanism to form a mold; a mold exit mechanism movement amount detection means that outputs an electric signal, and the end face of the mold on the downstream side in the mold delivery direction passes through an arbitrary detection position downstream of the positioning member of the guide mechanism in the mold delivery direction. a mold end face detection means that outputs a predetermined detection signal when the end face of the mold □ downstream in the delivery direction of the mold delivery mechanism passes through the detection position; The amount of movement detected by the mold retracting mechanism during the period from when the mold end face detecting means outputs a predetermined detection signal to when the mold discharging mechanism end face detecting means outputs the predetermined detection signal. The casting method is characterized in that the automatic pouring device is driven by calculating the counted value of the electric signal and detecting the frame thickness of each of the formed molds based on the counted value to drive the automatic pouring device to perform pouring. It is a system.

1 actual example An embodiment of the present invention will be described below with reference to one drawing.

FIG. 4 shows a casting system according to an embodiment of the present invention.0 An outline of a casting system according to an embodiment of the present invention is shown in FIG.
As is clear from the figure, is the modeling device ie frameless modeling?
T! ! 51, and the conveyance start end side is the frameless modeling mentioned above? A linear conveying device, that is, a mold conveying device 153, which is in contact with the mold delivery side of tast, and a mold conveying device in close proximity to the mold conveying device 53! ! 53, and an automatic pouring device M57 that can reciprocate on the soft portion 55. The above-mentioned modeling device 51 is
Various molding sands, which are the materials for molds, are fed by a mold delivery mechanism, ie, a pusher 203, a first mold 207a, and a positioning member, ie, a second mold 207b, as shown in FIGS. 1 and 2. By applying an appropriate amount of molding pressure, the mold M is shaped, for example, the mold O1 shown in FIG. The mold M formed with the feed stroke indicated by arrow S
is continuously delivered onto the mold conveying device M53. (Each member including the pusher 203 will be explained in detail later.) In addition, in the vicinity of the frameless modeling device 151, as will be explained in detail later,
The mold delivery mechanism movement amount detection means, that is, the first pulse encoder 209, the mold end face detection means, that is, the transmission type phototube B1 for light emission and the transmission type phototube 81' for light reception, and the mold delivery mechanism end face detection means, that is, the reflection type phototube B2, are used. It is provided in the manner shown in FIGS. 1, 2, and 3. The mold conveying device 53 is driven by a mold conveying device driving means such as an electric motor (not shown), and is connected to a plurality of molds (FIG. 4, molds θ to
(2)) is equipped with various conveyors (not shown) capable of continuously and intermittently conveying the materials to the right in FIG. The automatic pouring device 57 has a pouring device drive means 5, such as an electric motor, which is attached to the automatic rIk device 57.
9 to reciprocate on the rail portion 55. The configuration of the automatic pouring device M57 may be already well known to those skilled in the art, but the automatic pouring device 57 used in the casting system according to an embodiment of the present invention is disclosed in Japanese Patent Publication No. 52-9580 and Tokuko Sho 55-4627
The pouring method and pouring ladle disclosed in Publication No. 2 are preferably used. On the opposite side of the mold conveying device 53 to the side where the rail portion 55 is provided, a pouring position confirmation device N61 is provided facing the rail portion 55.

Furthermore, to explain in detail the installation position of the pouring position confirmation device 61, the installation position of the device 61 is a distance from the origin P1 with the mold delivery side of the frameless modeling device st as the measurement origin P1. It is set at a position that can be covered by the pourable zone Jio, which is set based on the distant pouring origin P2. The pouring position confirmation device W161 is
The guide rail portion 63 and the power transmission portion 65 are arranged along the mold conveyance @@53, and the power provided on the guide rail portion 63 and applied via the power transmission portion 65 moves the guide rail portion. a movable body 67 that reciprocates on 63;
A driving means 69 such as an electric motor provided at one end of the power transmission section 65, a second pulse encoder 71 attached to the driving means 69 to detect the driving state of the driving means 69, and the above-mentioned movable body 67. A mold position confirmation sensor 73 for confirming the current position of the hot water socket of the mold to be poured, which is attached to the automatic hot water? Place 57
In this embodiment, the automatic pouring device position feedback control sensor 75 confirms the current position of the outlet of the tap. The movable body 67, the driving means 69, the second pulse encoder 71, and the mold position confirmation sensor 73 constitute means for detecting the mold position during pouring. The automatic pouring device position feedback control sensor 75 and each member other than the mold position confirmation sensor 73 constitute means for detecting the position of the automatic pouring device 57 during pouring. The two types of detection means are sensor 73 and sensor 7.
Except for No. 5, each member constituting the pouring position confirmation device i61 is shared. Note that the manner in which the two types of sensors 73 and 75 are installed is not limited to the manner described above. For example, the automatic pouring device position feedback control sensor 75 may be installed in the automatic pouring device 57.
There is no problem in disposing the sensor 7 on the side in the same manner as described above.
The three types of sunners 73, 74, and 75 mentioned above may be installed around the position confirmation sensor, and any known sensor 73, 74, 75 may be used as long as it is applicable. As an example, a CCD (charge-coupled device) camera is assumed. Various sensors 81 mentioned above. B1'B2.209.71.73.74.7
The detection signals outputted from each of the drive means 59, 69, etc. are inputted as respective sensor information to the control system shown in FIG. .

The configuration of the frameless modeling device 51 described above will be described in more detail as follows. That is, the frameless modeling device I51
As is clear from FIG. 1 and FIG. 2, the guide mechanism 201 mainly extends in a substantially straight line, and the mold delivery mechanism is formed to be able to reciprocate within the guide mechanism 201. That is, the pusher 203, the second mold 207b, which is a positioning member that can freely move in and out of a predetermined position within the guide mechanism 201 and cooperates with the pusher 203 to form the mold 205, and the amount of movement of the pusher 203. The configuration includes a pulse encoder 209 and the like that outputs a corresponding square wave pulse signal. The guide mechanism 201 extends approximately in the shape of a belt, and has pillars 201b and 201b.
It consists of a bottom plate part 201a supported at a predetermined height from the floor by 01b, etc., and side plate parts 201c, 201c provided on both sides of the bottom plate part 201a in the longitudinal direction, respectively. The guide mechanism 201 is formed so that when viewed from one longitudinal end of the guide mechanism 201, the bottom plate portion 201a and the side plate portions 201c, 201c have a substantially U-shape. The pusher 203 is shown in FIGS.
As is clear from the figure, it has an approximately T-shape as a whole, and includes a drive source such as an electric motor that can freely rotate in forward and reverse directions, and a sprocket wheel supported on the rotating shaft of the drive source. A chain is rotatably attached to the starting end side of the pusher 203 in the mold feeding direction and is wound around a sprocket wheel equipped with a torque limiter mechanism, and is also wound around the first pulse encoder 209 described above. With the mechanism 211, FIG.
Fig. 2: It is configured to freely reciprocate in the left-right direction.

As is already clear from the above content, in this example,
Along with the second mold 207b, the second mold 20
A first mold 207a is used which has a shape substantially similar to that of mold 7b and is smaller than the second mold 207b. The first mold 2
07a is the guide mechanism 20 together with the pusher 203.
After moving to the downstream opening of the pusher 2
03, it returns to its original position on the left side of FIGS. 1 and 2. As is clear with reference to FIG. 1, the second mold 207b is movable into and out of the guide mechanism 201 at a predetermined position inside the guide mechanism 201 shown in FIGS. 1 and 2. It is configured. That is, the second mold 207b has its negative end (upper side in FIG. 1) aligned with the rotating shaft 20.
8,208 and membrane rotating wheels 208,
It is adapted to be swung in the direction of the arrow in FIG. 1 by a driving means such as an electric motor (not shown) connected to the motor 208. During mold manufacturing, the second mold 207b is located at the position shown by the solid line in FIG. The bottom plate part 201a moves smoothly inside the mechanism 201 in the right direction in FIGS. 1 and 2.
It can be moved upward to a position '11' (indicated by the dotted chain line in FIG. 1) where it is approximately parallel to the position shown in FIG. In the second mold 207b, the mold M, the first mold 207a, and the pusher 203 move toward the downstream opening of the guide mechanism 201, and the first mold 207a and the pusher 203 move toward the aforementioned original. When it returns to the position, it is immediately moved downward by the aforementioned driving means and appears within the guide mechanism 201,
Now we are ready for the next casting job.

Furthermore, according to one embodiment of the present invention, the guide mechanism 201
A predetermined detection signal is output to an arbitrary position downstream of the second mold 207b in the mold delivery direction when the end face of the mold M on the downstream side in the mold delivery direction passes the position. A pair of transmissive phototubes Bl for light projection and a transmissive phototube Bl for light reception are provided.Furthermore, when the downstream end face of the first mold 207a in the mold sending direction passes through the detection position, A reflective phototube B2 is also provided for outputting a predetermined detection signal.
As shown in FIGS. 2, 3, and 3, they are arranged to face each other with the guide mechanism 201 interposed therebetween. The transmission type phototube Bl for light emission and the transmission type phototube Bl' for light reception are connected to the side plate part 20.
They are provided facing substantially U-shaped notches formed in opposing parts of 1c and 201c. Further, the reflection type phototube B2 is connected to the transmission type phototube Bl for light emission in the notch on the side where the transmission type photocell for light emission B1 is provided.
It is located directly above the Transmissive phototube B for light reception
l' outputs a predetermined electrical signal when the downstream end face of the mold M in the mold feeding direction passes through the position and the light rays irradiated from the transmission phototube 81 are blocked. ing. In the reflective phototube B2, when the mold delivery side end face of the first mold 207a, which is made of a metal with high light reflectance, passes through the position, the light rays irradiated to the outside hit the end face. When it detects that the amount of reflection has increased.

In this embodiment, the transmission type phototube B1 for light emission, the transmission type phototube B1' for light reception, and the reflection type phototube B2 are configured to output a predetermined electric signal.
Although the molding device 2t5 is provided in a region downstream in the mold delivery direction from the installation position n of the second mold 207b in the molding device 2t5.
It may be provided not only in this area in 1 but also in an area upstream in the mold conveyance direction from the later-described pourable section of the mold conveyance device 2153.

In this embodiment, the square wave pulse signal output from the pulse encoder 209, the output signal from the light-receiving transmission phototube Bl', and the output signal from the reflection phototube B2 are shown in FIG. 5, which will be described later. The signal is input to the H width calculation output means 5 shown, and the H width calculation output means 5 calculates the mold flask ffH of each mold M based on the various output signals. That is, there is an error (approximately 0.5 to 2 mm) between the frame thickness of the mold M at the time of modeling and the frame thickness H of the mold M after molding for the reasons described above. Therefore, the output from the first pulse encoder 2o9 is not during mold molding, but from the time when a predetermined signal is output from the light-receiving transmission phototube Bl' to the time when a predetermined signal is output from the reflection phototube B2. The number of square wave pulse signals received by the pusher 20 within the time period
3 and the amount of movement of the first mold 207a) was counted, and the obtained counted value was taken as the frame thickness H of the mold M. By performing such arithmetic processing, it is possible to eliminate the error that occurs between the frame thickness of the mold M when measuring the frame thickness and the frame thickness of the same mold M when pouring. Ta. The above-mentioned algorithm in which the H width calculation output means 5 calculates the frame thickness H of the mold M after molding is based on the distance from the first mold 207a to the second mold 207b immediately after molding $8, and the first When the thickness of the mold 207a is a and the thickness of the second mold 207b is a', the first
Algorithm for determining the frame thickness H of the mold M sandwiched between the mold 207a and the second mold 207b H=D −(
a+a')... is equivalent.

FIG. 5 shows a circuit configuration centered on a control system used in a continuous casting system according to an embodiment of the present invention.An outline of the circuit configuration in a continuous casting system according to an embodiment of the present invention is shown in FIG. As is clear with reference to the control unit 110
and a pouring position correction device 12. The control unit 110 adds the square wave pulse signals output from the first pulse encoder 209 described above, and when the added value exceeds the distance shown in FIG. This method predicts the position of the spout of the next mold to be poured after pouring the metal. The control section 1
Reference numeral 10 denotes the already mentioned H width calculation output means 5, H width storage storage means 6, signal section 7. N frame number discriminator 8, comparison calculation? Place 1
0 and a moving distance output device fill. The aforementioned H
The width calculation output means 5 performs the process as described above,
The electric signals outputted from the light-receiving transmission phototube 81', the reflection phototube B2, and the first pulse encoder 209 are inputted into the frameless modeling device 51 shown in FIGS. 1, 2, 4, etc. The frame thickness H in the transport direction of the mold M that is successively formed is calculated each time, and the calculated value is output. The H width storage storage means 6 stores the H width data for each mold sequentially outputted from the H width calculation output means 5 until the H width data of a new mold is given from the H width calculation output means 5. When new H-width data is given, the held H-width data is output. The signal section 7 receives the H width data of each mold sequentially output from the H width memory holding manual die 6, adds them, and outputs the added value to the N frame number discriminator 8. It has become. The signal unit 7 is configured to output the added value data when the N06 discriminator 8 receives a signal notifying that the added value has reached the preset number of mold frames. ing. The N frame number discriminator 8 takes the mold delivery side of the frameless molding device 51 shown in FIG. The number N of unfilled mold frames that have reached the pourable zone no set as the standard (in this example, molds 7 of molds ■ to ■)
frame) The data is stored in advance. The N frame number discriminator 8 compares the frame number N data with the added value data output from the signal section 7, and determines that the added value has become a value corresponding to the frame number N. At the time of recognition, a notification signal is output to the signal section 7.

The comparison calculation device 10 sequentially adds the above-mentioned H width data outputted from the H width storage holding means 6, and adds the added value of the H width data and the signal outputted from the signal section 7. Based on the result of the comparison calculation with the added value data, the pouring position of the mold to be poured next to the mold currently being poured is predicted. The comparison calculation device 1O outputs a drive command signal to the travel distance output device 2tll to drive the drive means 69 shown in FIG. 4 according to the result of the prediction, thereby causing the drive means 69 to be driven. ing. The comparison calculation device 10 recognizes the current position of the movable body 67 by adding and subtracting the signal output from the second pulse encoder 71, and when the recognized current position of the movable body 67 matches the predicted position, the above-mentioned It is configured to stop the driving of the driving means 69.

The pouring correction device 12 includes the comparison calculation device 2110
When the pouring execution command signal output from the molten metal pouring execution command signal is inputted, a drive command signal is sent to the pouring device driving means 59 with reference to the drive command signal outputted from the comparator unit NIO to the moving distance output device fill. This is what is output. The pouring correction device 12 uses detection signals output from the automatic pouring device position feedback control sensor 75 and the mold position confirmation sensor 73 to adjust the tap of the automatic pouring device 57 to the next mold to be poured. The driving means 59 is configured to stop driving when it is recognized that the position coincides with the pouring spout.

Next, the control operation of the control system configured as described above will be explained.

As shown in Fig. 4, the frame thickness in the conveying direction of mold (2) located within the pourable zone no. Assuming that the frame thickness in the conveying direction of the mold ① immediately after being modeled using the frameless modeling device fi51 is assumed to be H as shown in the figures,
The distance LL from the above-mentioned total Xl11 origin Pi to the pouring port of the mold (■) currently being poured can be expressed as L 1 =A+B+C+D+E+F+G...■. In addition, the distance L2 from the measurement origin Pl to the pouring port of the mold ■ that connects the mold ■ is L2 = (
It can be expressed as Ll-A)+H---■. Furthermore, as is clear from FIG. 4, the following also holds true: 1=LL-L...■ 12=L2-L...[Phase]■. Therefore, in this embodiment, the H-width calculation output means 5 calculates the frame thickness in the transport direction of the molds sequentially formed by the frameless molding device 51 using the light-receiving transmission phototube Bl', the reflection phototube B2, and the first The H width calculation output means 5 is calculated based on the signals respectively output from the pulse encoder 209.
Frame thickness in the transport direction of the mold output from A, B, C, D, E
, F, and G are added in the signal section 7, and when the added value becomes Ll (Ll>L), it can be seen that the first mold (2) is poured. In this way, while pouring into the first mold ■, the mold ■
The process of predicting the pouring position of the mold (2) to be poured next is as described below. As shown in FIG. 4, assuming that the pouring position of the mold (■) is O, the automatic pouring device 57 is currently pouring metal into the mold (■).
The movement distance of the automatic pouring device 57 from the current position to the above-mentioned pouring position O can be expressed as: Cross=12-11...Φ■. Therefore, it can be seen that by substituting the above-mentioned equations (1) and (2) into the equation 0, the following equations can be obtained: =L2-Ll =H-A.

(B) Here, if l=o (that is, H=A), the position of the movable body 67 in the pouring position confirmation device 61 shown in FIG. 4 is as shown in FIG. As long as the movable body 6゜7 does not move, the current position can be left as it is, and automatic pouring will begin! There is no need to move the A position 57 either. Therefore, the pouring position correcting device 12 that constitutes the control system. When the pouring into the mold ■ is completed and the next mold ■ is moved to approximately the same position as the pouring position of the mold ■, at the end of the intermittent conveyance, the pouring position confirmation device
The signal output from the second pulse encoder 71 of i61, the output signal from the mold position confirmation sensor 73, automaticity? g
After confirming the relative positional relationship between the tap of the automatic pouring device 57 and the hot water socket of the mold ■ by taking in the output signal from the device position feedback control sensor 75, etc., immediately pour the metal into the mold ■. I will do it.

(b) If l>O (that is, H>A), the position of the movable body 67 shown in FIG. 4 needs to be moved by (H-A) to the right in FIG. . Therefore, the comparison calculation device 10 of the control unit 110 has a moving distance output device Mll
A device to check the pouring position! 161 movable body 67 (H-
A drive command signal is output to move the automatic pouring device 57 to the right in FIG. The automatic pouring device driving means 59 is driven in accordance with the drive command signal output from the correction device 12. After the automatic pouring device 57 is thereby moved to a position opposite to the stop position of the movable body 67, pouring into the mold (2) is carried out in the same process as (a) below.

As explained above, according to an embodiment according to the present invention,
After a new mold is manufactured by the frameless molding device 51, that is, after the mold is elastically deformed, the frame thickness H of the mold is determined in the manner described above, thereby determining the frame thickness of the mold at the time of measurement and the thickness H at the time of pouring. Eliminate the error that occurs between the mold frame thickness, perform the calculations described above, predict the pouring position of the mold to be poured next to the mold currently being poured, and make the prediction. The movable body 67 of the pouring position confirmation device 61 is first moved to the pouring position, and then, when the pouring work is completed, the automatic pouring device 2t57 is moved to a position opposite to the stop position of the movable body 67. Next, the mold to be poured is moved to the predicted position by the mold transport device i! 153 before or during the intermittent conveyance. Also, the mold conveying device 53 of the mold group is
Ji above! If the condition of It is random such that there are some gaps between each mold, when the next mold to be poured stops, the position of the mold position confirmation sensor and the spout do not match. Searches to the right if the mark on the mold side has already passed the confirmation sensor, and to the left if the mark on the mold side has stopped without passing by. Through the above-mentioned searching, the position is found and the pouring process is performed based on the output signal from the second pulse encoder 71, the output signal from the mold position confirmation sensor 73, and the output signal from the JI device position feedback control sensor 75. The execution position correction device 12 corrects the driving means 59 so as to bring the outlet of the automatic pouring device W157 into alignment with the position of the spout of the mold to be poured next.

The above correction by the pouring position correction [112] makes it possible to reliably supply the molten metal to the molten metal socket of the mold, and to avoid the danger of high-temperature molten metal overflowing around the mold. .

As is clear with reference to FIG. 4, one embodiment according to the present invention described above is a case in which the seventh frame of the mold counting from the measurement origin Pi is set as the pourable zone. In the general frameless modeling device i51, which has a structure in which the width of the frame thickness in the transport direction (i.e. H width) can be changed steplessly according to the thickness of the product in order to effectively utilize the sand used, the above H The percentage change in width is quite large. In general, such a change in H width is determined by setting the maximum capacity width of mold forming in a frameless molding device as Hmax, and the minimum capacity width of Hmax.
min, it will be between the maximum capacity width Hmax and the minimum capacity width Hmin.

Therefore, when attempting to control the pouring position using the method described above by setting a pourable section such as io shown in FIG. 4 in response to such a change in Hll, for example, When the H width increases, the pouring position of the mold (2) to be poured next will be shifted to the right in FIG. 4 by H-A. Similarly, the pouring position for mold ■ is shifted by H-B, and the pouring position for mold ■ is shifted to the right in Figure 4 by H-C. is also shifted to the right in FIG. 4 by HG. As a result, we ended up needing an extra L/2 pourable section no.
If the value of the difference is large, the pouring zone will be long and the equipment will require a large amount of cost. Therefore, a method that can effectively deal with such a large value of L without requiring a large amount of equipment cost will be described below.

Now, it is assumed that the average frame width of the molds ■ to ■ frames within the range L of the mold conveying device 53 shown in FIG. 4 is W, and that the loading contents have changed after the mold ■ frame. Let us consider a case where it is assumed that the width H of the frame currently being modeled by the frameless modeler 51 is H=1/2W. From the above-mentioned formula 0, LL=7XW...■ is obtained, and from the above-mentioned formula (2), L2= (7-1)・W+l/2W=6.5W...■
is obtained. In the same way, L3 = (6,6-1)・W+ 172W= 6W・Excellentφ■ is obtained, and according to the above formulas ■, ■, and ■, the mold is conveyed for one frame in the mold conveyance # position 53. Each time, the pouring position moves to the left in FIG. 4 by 1/2W width. This phenomenon is caused by the above mold conveyance system for 7 mold frames! At 153, it continues to be intermittently conveyed to the right in Figure 4, and eventually reaches 7
When pouring into the mold of frame size, the pouring position moves to the left in FIG. 4 by 3.5 mold frames. On the other hand, contrary to the above, if the frame width in the transport direction of molds ■ to ■ is 1/2W and the frame width H after the 14th mold ■ frame is H=W, the pouring as shown in FIG. In principle, the possible range no will be expanded. That is, if the number of mold flasks from the measurement origin Pi to the pouring position shown in FIG. 0 can be expressed as Jlo=NXW...■. As is clear from the equation 0, as the value of N increases, the value of no also increases, and therefore the pourable section indicated by no also expands.

Therefore, in order to improve such drawbacks, we set the pourable section intersection 0 to Jlo = Hmax, and first, the frame width A in the conveyance direction of the mold (2) and the frame width H in the conveyance direction of the mold (2) are Comparison is made by the above-mentioned comparison arithmetic unit to. As a result of the comparison, when ASH.

(a) If A-H≦11, switch automatic pouring device W157 to A-H
Move from the current position to the left in Figure 4 by the amount of time.

(b) If A-H>11, one-time pouring is expected.

On the other hand, as a result of the above comparison, when ASH.

(c) If H-A≦no-Jll, move the automatic pouring device 57 from the current position to the right in Figure 4 by H-A, (d) If H-A>text o-11, no Frame modeling! ! ! 51
Before starting the feeding operation of the mold to the mold conveyance chamber 2153, the automatic pouring device 2157 is moved from the current position to the fourth position by A.
Move it to the left in the figure and pour the metal again. After that, the automatic pouring device 215
7 to the right. If it is difficult to move an automatic pouring device in a short period of time due to cycle time constraints, for example, a mold conveying device that receives the molten metal flowing out from the automatic pouring device It is also possible to cope with the problem by providing a gutter that is long in the conveying direction and a gutter driving device that reciprocates the chain gutter along the operator direction of the mold conveying device.

By executing the process explained above, the pouring section section no. can be set to io=Hmax, and as mentioned above, even when the mold frame width changes greatly,
It is possible to adequately deal with this.

In addition, in the explanation in -h, the automatic pouring device 57 is
153, the scope of application of the present invention is not limited to the above-mentioned embodiments, and the present invention is not limited to the above-mentioned embodiments. Now that the process can be performed with extremely high precision, by correcting the amount of movement of the pusher 203 based on the calculation described above, pouring can be performed while the automatic pouring device 57 remains fixed at a preset pouring point. It has become possible to apply this method to casting systems configured to perform this process.

As explained above, according to the present invention, by eliminating the measurement error of the mold frame thickness caused by the elastic deformation of the foundry sand, the difference between the spout and the spout of each mold during pouring is eliminated. Automatic note!
It is possible to provide a casting system that can be controlled so that there is no misalignment with the spout of the H device.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing a frameless modeling device included in a casting system according to an embodiment of the present invention. FIG. 2 is a partial plan view showing a frameless modeling device included in a casting system according to an embodiment of the present invention. FIG. 3 is a longitudinal sectional view showing the relationship between a mold and a transmission type phototube for projecting light, a transmission type phototube for receiving light, and a reflection type phototube according to an embodiment of the present invention. FIG. 4 is a partial plan view showing the configuration of a mold system according to an embodiment of the present invention. FIG. 5 is a block diagram showing a circuit configuration centered on a control system used in a casting system according to an embodiment of the present invention. 51: Frameless modeling device 53: Mold transport device 57: Automatic pouring device 201: Guide mechanism 203: Busher 207a: First mold 207b: Second mold 209: First pulse encoder Bl: Transmissive type for light projection Phototube 81': Transmissive phototube for light reception B2 Dual reflection phototube M: Mold

Claims (1)

[Claims] 1) A molding device that forms molds and sequentially sends them out, a conveyance device that receives a group of molds sent out from the molding device and intermittently conveys them, and a mold that has been conveyed by the conveyance device. In a casting system equipped with an automatic pouring device that sequentially pours metal into each mold forming the mold group,
The modeling device includes a guide mechanism extending substantially linearly;
a mold delivery mechanism formed to be able to reciprocate within the guide mechanism; a positioning member that is movable in and out of a predetermined position within the guide mechanism and forms a mold in cooperation with the mold delivery mechanism; and the mold. a mold delivery mechanism movement amount detection means that outputs an electric signal according to the movement amount of the delivery mechanism, and detects an arbitrary detection position downstream of the positioning member of the guide mechanism in the mold delivery direction. a mold end face detection means that outputs a predetermined detection signal when the downstream end face of the mold delivery direction passes through the detection position; and a mold end face detection means that outputs a predetermined detection signal when the downstream end face of the mold delivery direction of the mold delivery mechanism passes the detection position. and a mold delivery mechanism end face detection means for detecting the mold delivery mechanism, during a period from when the mold end face detection means outputs a predetermined detection signal to when the mold delivery mechanism end face detection means outputs the predetermined detection signal. A count value of the electric signal outputted from the mechanism movement amount detection means is obtained, and based on the count value, the frame thickness of each of the formed molds is detected, and the automatic pouring device is driven to perform pouring. A casting system characterized by the following. 2) The mold end surface detection means is constituted by a transmission type phototube for light emission and a transmission type phototube for light reception, which are arranged opposite to each other via the guide mechanism at the position of the guide mechanism. 2. The casting system according to claim 1, wherein said mold delivery mechanism end face detection means is a reflective phototube disposed substantially directly above said transmission phototube for projecting light. 3) The mold delivery mechanism includes a pusher driven by pressure or the like and a mold integrally attached to the pusher, and the mold delivery mechanism end face detection means includes:
The casting system according to claim 1 or 2, wherein a predetermined detection signal is output when the downstream end face of the mold in the mold delivery direction is detected. 4) According to any one of claims 1 to 3, wherein the mold delivery mechanism movement amount detection means is a pulse encoder that is wound around the chain mechanism and rotated by the chain mechanism. Casting system described.