JPS6068136A - Production unit for mold - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automated apparatus for forming green sand molds for use in foundries.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that can be operated with very high production efficiency, such as an automated mold making machine that can make more than 1000 molds per hour.

Other auxiliary objects of the present invention are: 1) to be able to produce molds with a high degree of reliability and precision, resulting in a very low mold reject rate; If the removed mold is stacked on top of another mold with little or no damage,
The mold can be precisely aligned and the mold container can be filled very quickly, albeit at low pressure, resulting in a longer service life of the model and little chance of breakage or distortion, while at the same time benefiting from high productivity rates. ■It is possible to make an upper mold and/or a lower mold, and it is possible to load a mold with a cavity either above or below the separation surface, and it is also possible to make a half-model mold. The object of the present invention is to provide an automated mold manufacturing apparatus that is capable of stacking an upper mold and a lower mold, and is equipped with a particularly efficient index drive mechanism.

The above objects of the present invention are achieved by the following casting mold manufacturing apparatus. The apparatus is attached to indexing means for indexing the mold vessels through a plurality of successive different stations and is further connected to said indexing means for filling one of the mold vessels with sand and for filling the mold vessel with sand. a molding station for squeezing sand in the container to form a mold with a pattern engaging at least one side and then pulling the pattern away from the mold, said molding station including a sand loader; and a sand macan which is mounted for movement between the molding station and the molding station so that it can be loaded with sand while forming the mold in the molding station; a discharge means for supplying compressed air to a portion of the sand magazine and rapidly discharging sand from the sand magazine into a mold container located at the mold forming station; a squeezing head forming the upper surface of the mold during the squeezing operation, the squeezing head being movable into and out of the molding station to allow sand maggots to enter the molding station; The mold manufacturing device is further coupled to indexing means,
It has a mold removal station for receiving a container containing formed molds and for transferring the molds from the container to a mold platform or to a stack of molds on platform 1.

(Example) Hereinafter, an example of the apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Referring first to FIG. 1, the machine shown is a duplex machine. In this machine, stations A1, A2 and 83 are identical in construction and operation to stations B1, R2 and B3. In other words, one half of the machine is symmetrical to the other half. As will be explained in more detail below, this machine merely represents a particular embodiment of the invention and is not intended to imply any quantitative variation. In the machine shown in Figs. 1 to 4, station show A
Since l-A3 and station B+-Ra have the same function and configuration, in this specification, one station A
+-A, only the introduction of a will be explained in detail.

Foundry sand enters the machine shown in FIG. 1 through a sand loading hopper 10 from a conventional type of feeding device, such as the conveyor 10a shown in FIG. 3). As is well known in the foundry art, the sand is usually premixed with a certain amount of powder or other powder to bind the sand particles together when molds are formed from the sand. The molds are formed in six mold vessels 11, the mold vessels 11. is placed on an index-type rotary table 12. More specifically, the mold is formed at stations A and B1,
A2 and B2 are inspected, and 83 and B3 are removed. In this embodiment, molds are discharged at stations A3 and B3 into stacked mold stacks 18a, 131) supported by platforms 140 and 14b.

When the loading 13a, L 31) is completed, the hydraulic or pneumatic cylinders 15a, 151) advance the arc-shaped push plates 16a + 16b.

The pushing plates 16a, 161] deliver the finished load 13a, 1313 to the appropriate conveyor 17a+1713, shown in broken lines in FIG.

Regarding the sand loading hopper 1o, the sand contained in the sleeve of this hopper 10 repeatedly fills a sand magazine 20, which is supported by a kidney-shaped reciprocating plate 21. This reciprocating plate 21 also supports a compression head 22.

Moreover, since the reciprocating plates 21 are rotatably attached to the shaft 23, these reciprocating plates 21 move back and forth, and the sand mackerel 20
and the squeeze head 22 can be aligned alternately with the molding station A1. Hopper 1 for sand magazine 20
It is automatically filled with sand by gravity feeding from zero. Every time the reciprocating plate 21 rotates, the sand magashino 20 is loaded into the loading hopper 1.
Matches 0. When rotating the shuttle plate 21 to move the sand magnon 20 to mold station A1, the rigid portion of the rotating plate 21 rubs across the bottom of the hopper 10 and acts as a gate to close the bottom of the hopper 10. . The pivoting movement of the shuttle plate 21'' about the axis 23 is effected by a hydraulic or pneumatic cylinder 24 (FIG. 2).

At the mold forming station 'A1, the rotary table 1
One of the mold containers 11 supported at 2 is aligned with the sand gun 20 of the reciprocating plate 21. Sand is then extracted from the sand magazine 20 into the mold container 11. A mold is then made by a press molding operation, which will be described in detail below.

The container containing the molded mold is sent from molding station A1 to inspection station A2, and remains there for manual inspection during the time j required for molding the mold in the next container. During this time, the mold in the mold container 11 located at station 83 is removed from the mold container 11 of that station. The removed mold is accurately placed on the platform 1--the stack 13a of the platform 14a. Alternatively, in the case of an initial mold or recycle molding operation, the mold is placed directly on top of the bracket 1-14a.

In order to drive the rotary table 12, a Kia motor 25 is connected to a spindle 26 of the rotary table via a Geneva drive mechanism 27 shown in FIGS. To explain in more detail, the motor 25 has driven rollers 27 t at both ends,
+, Geneva type with 27 c
ype )'s drive arm 27a is rotated. When the drive arm 27a is rotated by the motor output shaft 25, the rollers 271), 27c move in and out of the radial slots.

This thrower l~ is connected to six sets of index tr'acks (1ndex tr'ack) attached to the top surface of the rotor 27f.
s) formed by 27 d, 27 e, rotor 27
``is the desired intermittent or index movement (i and
Ex ing movem(+nt) is performed. Separately, the rotor 27f is fixed to the upper end of the spindle 26 of the rotary table 12, so that the intex movement of the rotor 27f'
This is said to be the INTEX movement.

When the drive arm 27a makes a half turn, the rotor 27f and the rotary table 12 make a 1/6 turn. As a result, each mold container 11 supported by a rotating chiffle is continuously fed through the working stations A, ], -A, a and B 1-n 3 of 6-). To explain in more detail, while the drive arm 27a alternately rotates half a rotation, the first driven roller 27+) rides on the cam surface formed by one index track 27c, causing the rotor 27 to rotate by 1/¥. Similarly, while rotating drive arm 27a one-half rotation, second driven roller 27C rotates roller 27'' one-sixth of a rotation through the same type of camming action.

In order to position the drive arm 27a and the rotor 27' in a detent position for every half revolution of the drive arm, both rollers 271]' and 270 are indexed by an index track 27d at a particular angular position of the drive arm for every half revolution. 27c
The index tracks 27d and 27c are arranged and shaped so that they simultaneously engage the index tracks 27d and 27c. Connected to the drive motor 25, f-, boo. The key stops the drive arm at this particular angular position at the end of each half-turn. As shown in detail in FIG. 6, the radius of the outer end curved portion of each index rail 27d, 27c is
．． It is slightly smaller than the radius of the circular path drawn by the adjacent surface of 27C. Therefore, when the drive arm 27a is in the detent position shown in FIG. 5, both rollers 27 +) +
27 c contacts the rails 27 c and 27 CI. Each time the drive arm 27a begins to move from this detent position, the exit roller (i.e. the roller 27 in FIGS. 5 and 6)
C) quickly leaves the surface of the inte-nox rail 27d. Then, until the drive arm 27a makes a complete half-rotation and the roller 27 (L27G returns to the detent position), the rollers 27C, 27C, and the rail 27 (L or 27E)
Do not re-engage with any of the following.

For each intex movement of the rotating tagol 12, the empty mold container 11 is transported to the forming station A1 and aligned with the hydraulic cylinder 30. This hydraulic syringe 30 supports a platen 3 and a platen holder at the upper end of the screw I/Nororad 33 supports a stand 32. While moving the rotary table 12, the reciprocating plate 21 is simultaneously rotated to align the sand-filled magazine 20 with the molding station A1 and empty the mold container 11 (as shown in FIG. 7). is directly covered. Sand Magano 20 is completely filled with sand (containing a conventional binder premixed with the sand). This sand magazine holds more sand than is needed to make the desired mold. As seen in FIG. 7, the manifold holes at the bottom of the sand magazine 20 are open.
The sand's natural ``clog'' prevents the sand from flowing out of the magazine force until air is blown onto the sand from the top of the carriage.

Each time the empty mold container 11 without sand enters the molding station, the hydraulic sill 30 (turn 34) of the mold supported by the cradle 32 is inserted into the empty mold container 11 shown by the broken line in FIG. This mold model closes the bottom of the empty mold container 11. Also, a gasket 35 is provided around the outer periphery of the mold model 34 to create a seal between the inner wall of the mold container 11 and the outer edge of the mold model 34. When the mold model 34 is held by the hydraulic cylinder 30, the sprue pin 36 projects upwardly from the center of the mold model 34 by an inner hydraulic or pneumatic cylinder 37.

As will be clear from the following description, this sprue pin 36 forms a sprue opening that must be formed in the center of the mold, and determines the size and shape of this sprue opening.

After the gasket 1-35 first engages with the needle surface at the lower end of the inner wall of the mold container 11, the shilling 30 moves continuously to lift the empty mold container 11 from the rotary table 12, and as shown in FIG. As shown in Figure 1, the bottom of the sand magazine 20 is aligned with the lower end of the sand manifold 40. Mold container 1
1 engages a gasket 41 on the underside of the sand manifold plate to form a good seal between the top of mold vessel 11 and the bottom of manifold 40.

During the upward movement of the mold container 11, the extended sprue pin 36 also seats and engages with the conical surface of the bin seat 42 projecting downward from the center of the manifold 40.

After lifting the mold vessel 11 into engagement with the sand manifold plate 40, the shaving machine 30 continues to raise the mold model 34 to the desired vertical position within the mold vessel 11 to form a fill space of the desired volume. are doing. That is, the mold model 34, the mold container 1
1. When the sprue pins 36 are in the final raised position shown in FIG. 9, they form an annular space. This annular space is predetermined to be of an appropriate size and shape to accommodate the appropriate amount of filler sand to form the desired mold.

The filling operation is carried out by blowing compressed air onto the top of the sand contained in the sand magazine 2o, so that the sand flows down through the sand manifold into the filling space in the mold vessel 11. This compressed air is supplied from the compressed air tank 5o through the control valve 51 and the porous holes 52 of the head plate 53. An air manifold porous linog 54 is mounted within an annular air distribution recess 55 to evenly distribute compressed air to the exposed sand surface of the magazine 20.

This distribution recess 55 is formed on the underside of the head plate 53 and communicates with the air port 1-52. The compressed air thus flows downwardly into the distribution recess 55 through the port 52 and
The air then passes through a number of openings in the air manifold ring 54. The compressed air flows from the manifold ring 54 through the sand magazine 2o and the manifold 4o at the lower end of the sand magazine 20 in the direction F, and exits through a plurality of air vent holes 44 formed at the bottom of the manifold 40. The air vent hole 44 is "1"
A fine screen (not shown) prevents sand from entering these air vent holes 44. Sand Makazin 20
A flow of air in one direction through the manifold 40 carries the sand downward into the mold vessel 11, so that the filling space is filled with sand, as detailed in Figures 8 and 9. As shown, the sand manifold 40 is a relatively thick plate with a number of funnel holes 43 that are relatively evenly spaced over substantially the entire area bounded by the side walls of the sand magazine 20. These funnel-shaped holes 43
When compressed air is supplied to a part of the sand magazine 20, the sand can be poured into the filling space from the sand magazine 20, and at the same time, after the air flow is cut off, the sand can be poured into the filling space. The manifold holes 43 are sufficiently filled with sand. As previously discussed, this natural packing tendency of the foundry sand ensures retention of the sand within the manifold 40. Therefore, even if sand is not discharged from the manifold 40, the manifold J
There is no need to close the open end of the hole 43 along the bottom surface of the l/t 40.

A gasket 56 extends around the outer periphery of the head plate 53 to form a seal between the head plate 53 and the upper surface of the reciprocating plate 21 and to supply compressed air to the head space of the magazine 2o; Compressed air is supplied to this gasket 56 through an outer peripheral tube 57. Therefore, the gasket 56 can be pneumatically extended downwardly and engaged with the upper surface of the reciprocating plate 21 .

After filling the filling space formed by the mold container 11, the mold model 34, the easy lobby 36, and the lower surface of the sand manifold 40 with sand, the reciprocating plate 21 stops rotating and the sand magazine 20 is returned to the sand loading hopper 10. There is.

In order to open the path for the rotary movement of the shuttle plate 21, the hydraulic cylinder 30 is lowered slightly and the mold container 11, filled with sand, is returned to the vicinity of the seated position of the rotary table 12. This intermediate position and the mold model 34 supported by the hydraulic cylinder 30 are shown in FIG. 1θ.

Further, the rotational movement of the reciprocating plate 21 aligns the compression head 22 supported by the reciprocating plate 21 with the forming station A1, as shown in FIG. This squeezing head 22 forms a rigid structure. By moving the hydraulic cylinder 30 supporting the mold model 34 further in one direction with respect to this structure, the filling sand can be squeezed. Further, the bottom surface of the compression head 22 determines the shape of the top surface of the mold. In each case, this side of the mold is completely flat, but if necessary the lower surface of the squeezing head 22 can be modeled and the upper surface of the mold can be provided with a cavity of the desired shape. Further, the bottom of the squeezing head 22 supports a conical Robin sheet 22a, which is the same as the sears 1 to 42 provided on the lower surface of the sand manifold 40.

As soon as the squeeze head 22 is aligned with the molding station A1, the hydraulic syringe 30 is actuated and the mold vessel 1 is again
Increase 1. During this operation, the mold container 11 is raised until the flat portion 11a of its upper surface engages the bottom of the squeeze head 22, as shown in FIG. Then,
The upward movement of the hydraulic sill 30 continues, squeezing the sand in the mold vessel 11 against the squeezing head 22, as also shown in FIG. As is well known, this squeezing operation of the filler sand solidifies the filler sand into a cohesive structure with clearly defined cavities. This creates a mold that is used to cast molten metal. The squeezing head 22 remains stationary while in forming station A1. The thickness of the mold is determined by the volume of sand in the filling cavity, and the hardness of the mold is approximately 3° hydraulic.
Determined by the pressure set.

Following the squeezing operation, the sprue pin 36 is retracted from the mold, and the hydraulic cylinder 3o is retracted to remove the mold container 11.
is returned to the seating position on the rotary table 12. At this point the mold is held securely within the mold container 11 by friction. The hydraulic sill 30 and mold pattern 34 are then powered downwardly to cleanly separate the mold pattern 34 from the mold, as shown in FIG. When separating the mold model 34 from the mold, the mold container 11 is held at a predetermined position on the rotary table 12 by three or more drawing pins 12a. The pins are mounted on a rotating table and are arranged at equal intervals around the outer circumference of the container. The tops of these pull-out pins 12a are tightly aligned with grooves on the underside of the flange portion of the mold vessel 11. Mold model 34
The downward movement of continues until the model 34 reaches the retracted position. When the model 34 reaches the retracted position, a path is formed in which the rotary table 12 and the mold container 11 supported thereon make index movements.

This completes the mold forming operation. The device is then ready for the next indexing movement of the rotary table 12. A subsequent indexing movement moves the mold container 11 containing the newly formed mold to molding station AI.
Then proceed to inspection station A2. At the same time, a new empty mold container 11 is transported to molding station A1. Then, the already formed mold is advanced from the inspection station A2 to the mold removal station 83.

At the mold removal station 83, the mold container 11 containing the completed mold is aligned with the removal head 60. This take-out head 60 is attached to the end of the piston rod 61 of the hydraulic cylinder 62,
Therefore, the head 6
0 can be pushed downwards. The take-out head 60 is engaged with the top surface of the finished mold, and negative pressure is applied to the tact 63.
added to. This duct 63 is connected to the take-out head 60
It is connected to an annular negative pressure chamber 64 formed on the lower surface of the .

This negative pressure is intended to hold the mold firmly under the removal head 60 as the removal head 6o moves downwardly through the casting vessel 11. as a result,
The mold is broken so that it becomes loose against the wall of the mold container 11. While the head continues its downward movement, the mold remains held against the underside of the ejection head 60 by the negative pressure.

In order to place the finished mold in the existing mold rest 13a (or in the case of the first mold, on one of the mold platforms 14a), the hydraulic cylinder 62 is connected to the mold container 11.
Continue lowering the take-out head 60 one by one until it reaches the bottom. In order to easily place the lowered mold on the mold rest ff13a, the optical fiber sensor 65 detects the bottom of the lowered mold when the mold reaches a predetermined position above the mold rest 13a. Then, the downward movement of the cylinder 2 is decelerated using the composite signal from the sensor 65.

As a result, the mold that is being lowered is kept stationary by the mold placement 13a.
It can be placed on top of the machine without any impact. When the downward movement of the cylinder 62 is completed, the sensor 65 first detects the descending mold, and at the same time the valve of the doctor 63 (
(not shown) to cut off the negative pressure, the upward retraction movement is started at a predetermined time. The retraction movement of the syringe 62 pulls the removal head 6o upwardly through the mold vessel 11 and returns the head 6o to its original starting position above the -L portion of the mold vessel 11.

As a result, index table 12 and this table 1
The channel of the mold container 11 supported by the mold container 11 is opened and lowered for the next intex process.

In addition to controlling the deceleration of the mold during its descent, the sensor 65 controls the intexing process of the lower cylinder 70 (FIG. 3). This lower syringe controls the height of the mold platform 14a. New mold platform i4
Cylinder 7o is added each time it is added to the mold placement of a-hi.
is the platform 1.4 a for the thickness of one mold.
lower. This indexing movement of cylinder 70 begins at the same time as the upward movement of cylinder 62 begins;
This continues until Sen++ 65 detects that there is no mold in the space adjacent to it. Subsequently, the downward movement of the cylinder 70 is completed, and the top of the mold pile on the platform 14a is always at the same height.

As previously stated, although the present invention has been described in a limited manner with respect to a particular embodiment, it is conceivable that modifications may be made to the operating table traversed by the index rotary table for handling different castings. For example, stations A'a + B 1 and B2 could simply be used as inspection and coring stations, with equipment attached to station B3 that makes only a single load of finished molds. Another modification is to replace station A2 with the conventional mold turning station 5-
- Alternatively, the mold container 11 can be rotated alternately and the upper mold and lower mold can be formed symmetrically using the same mold model. At that time, station A8. ! : B2 is used as an inspection and core-out station for the upper die, and station B1 is used as an inspection and core-out station for the lower die. Therefore, the stack of molds produced at station B3 is a symmetrical stack of alternating upper and lower molds having a common pouring spout.

Other modifications to the apparatus shown include replacing the Steenyo 7B2 with a conventional turning station and station B
3 can also be replaced with an inspection and coring station. With this modification, the lower mold is molded at station B1, rotated at station B2, and inspected at station B3. The core is also placed on the lower die at station B3. An upper mold is formed at station A1, and a core is provided, if necessary, at station A2, which is used again for inspection. If desired, a stack of alternating upper and lower molds to be troweled from different models could be placed at station A.

In other variations, conventional swivel stations can be used instead of both stencils A2 and B2. It is also possible to adjust the resting time of the index table to create cores at turning stations A2 and B2.

Only if the molds are rotated alternately in stations A2 and B2 will a mold stack consisting of symmetrical upper and lower molds be created in station B3. The model of the mold in the stack made at station A3 is different from the model of the mold in the stack made at station B3, but
The same applies to the loading of molds made from

As can be seen from the foregoing detailed description, the present invention provides an automated mold manufacturing apparatus. This equipment can be operated at very high production rates, for example, more than 1000 pieces per hour. This equipment can produce molds with a high degree of reliability and precision. Therefore, the proportion of defective molds is very low. There is little mold breakage at the mold removal station, and when the tops of the removed molds are stacked on top of each other, the molds can be accurately aligned. In addition, since the equipment quickly fills the mold container even at low pressure,
The service life of the mold model is extended, and there is almost no breakage or distortion of the mold model, and at the same time, high productivity can be obtained.

This device can make one type and/' or lower type,
It is possible to create a stack of molds with a cavity (either above or below the separation surface), it is possible to make a half-model mold, and it is also possible to overlap the upper mold and the lower mold, It is extremely versatile.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a portion of an automatic mold manufacturing apparatus according to the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a side view taken approximately along line 3--3 in FIG. 2. FIG. 4 is an end view taken substantially along line 4--4 in FIG. 2. 511a+,i is an enlarged plan view of the index drive mechanism of the apparatus of FIGS. 1 to 4; FIG. 6 is a partial view of the mechanism shown in FIG. 5 in different operating positions; FIG. FIG. 7 is an enlarged longitudinal section taken along line 7-7 of FIG. 8) is a horizontal sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a longitudinal sectional view showing a later stage of the mold forming operation. FIG. 10 is a longitudinal sectional view showing a later stage of the mold forming operation. FIG. 11 is a longitudinal sectional view showing the completed mold forming operation. FIG. 12 is a longitudinal sectional view showing the completed mold in preparation for sending it to the inspection station. FIG. 13 is a longitudinal section through the mold removal station of the apparatus of FIGS. 1-4; Mold container 1], rotary table 12, mold loading 1, 3
a, 1311, platform 1.4 a + 1
41+, sand magazine 20, squeezing head 22° Patent applicant: Hunter Automated Mannery Co., Ltd. Laneyong agent Patent attorney Hiroyoshi Onda

Claims (1)

[Scope of Claim] An apparatus for manufacturing one casting mold, comprising a plurality of mold containers, the mold containers having indexing means for indexing the mold containers through a plurality of successive different stations. and further coupled to the indexing means for filling one of the mold vessels with sand and squeezing the sand in the mold vessel into engagement with at least one side of the mold vessel. forming a mold with a mating pattern and further comprising a molding station for separating the pattern from the mold; said molding station being configured to move between a sand charger and said molding station; a sand maga (IIR+R+) attached to the mold forming station to form a mold and to load sand; and a sand maga, which supplies compressed air to the upper part of the sand maga in the mold forming station. a filling means for rapidly discharging sand from this sand machining into a molding station; and a squeezing head for shaping the upper surface of the mold during the squeezing operation at said molding station. Equipped with
The compressing head is provided so as to be movable into and out of the mold forming station so that the sand macargin can enter the mold forming station, and the mold is connected to the indexing means to house the molded mold. A mold making apparatus comprising a mold removal station for receiving a container and transferring the mold from the mold container to a mold platform or a stack of two molds. 2. The sand manifold comprises a sand manif'old that evenly distributes sand throughout the mold container when discharging the sand from the sand magazine into the mold container. The mold manufacturing device according to item 1. 3. The sand manifold has a plurality of funnel-shaped holes or a perforated plate, the holes extending downwardly through the plate and disposed uniformly over an area corresponding to the open area of the mold vessel. The mold manufacturing apparatus according to claim 2, wherein the mold manufacturing apparatus is arranged at intervals. 4. said filling means comprises a source of compressed air and an air manifold for evenly distributing compressed air over the upper surface of the sand in the sand magazine when the sand magnon is placed on the mold container in said molding station; At the bottom of the sand manipold,
2. The mold manufacturing apparatus according to claim 1, further comprising an air venting means for completely exhausting air after sending the sand through the sand manifold. 5. The filling means is a stationary part of the molding station and is located directly above the position of the sand magnon and the lower head of the molding station. mold manufacturing equipment. 6. The sand macannon and the squeezing head are mounted on a common frame, and the sand macannon is moved between the sand loader and the mold forming station by the rotation of the l/-m, and the mold forming station is carried out. 2. The mold manufacturing apparatus according to claim 1, wherein the pressing head moves in and out of the station at the same time. 7. said unloading station having negative pressure means for holding each mold against removal means at said unloading station and for transferring the molds from the mold container to said platform or mold loading. The mold manufacturing apparatus according to claim 1, wherein the Intex means has a rotary table, and a plurality of mold containers are attached to the upper part of the rotary table. The mold manufacturing apparatus according to item 1. 9 disposed between the mold forming station and the take-out station, and capable of inspecting each mold between the molding operation at the mold forming station and the work of taking out the mold from the mold container at the take-out station; ζ, equipped with a mold inspection station,
A mold manufacturing apparatus according to claim 1, characterized in that: 10 A mold turning station is provided between the mold forming station and the mold removal station, and the mold turning station has means for turning the mold container after the mold is molded in a specific mold container at the mold forming station. 2. The mold manufacturing apparatus according to claim 1, wherein said mold removal station is capable of removing any mold as an upper mold or a lower mold. 11. comprising two mold forming stations and a mold turning station between the mold forming stations;
The mold turning station includes means for turning at least selected mold vessels after forming the lower mold in the mold at the first mold forming station, so that the second mold forming station The mold manufacturing apparatus according to claim 1, characterized in that the upper mold can be molded. 12 Detecting that each mold taken out from the mold container at the mold removal station is within a predetermined distance from loading on the mold platform 1 - Baum or the same mold platform, and adjusting the descent rate of the removed molds to be the same. Mold manufacturing according to claim 1, characterized in that the mold is equipped with detection means that allow the mold to be decelerated before it comes into contact with the mold platform or with the mold load on the same mold platform. Device. 13 comprising means for raising and lowering the mold platform at the mold removal station, and the sensing means detects when the upper surface of the platform or the stack of molds on the platform is at a predetermined height; As a result, the mold manufacturing apparatus according to claim 12, wherein the vertical movement of the platform can be controlled to maintain the slope at a specific height. 14 A Geneva drive mechanism for index-feeding the rotary table, the Geneva drive mechanism comprising: a rotatable drive arm having a pair of driven rollers attached to both ends; a drive motor for rotating the drive arm; , furthermore,
a drive rotor, the drive rotor is connected to the rotary table, is arranged symmetrically at equal intervals about the axis of the drive rotor, and engages and cooperates with the driven roller. a plurality of cam surfaces, so that for every half revolution of the drive arm, the cam surface of the driven roller -
The cam surface is formed and arranged such that the rotor is intex-fed with a predetermined angular displacement by a cam action, and that for every half revolution, both rollers engage the cam surface at a unique angular position of the drive arm. 2. Mold making apparatus according to claim 1, characterized in that one angular position for every half revolution of the arm is a detent position for the rotor. 15 the radius of the curved portion of both outer ends of the force ram surface is smaller than the radius of the circular path drawn by the adjacent surface of the driven roller;
15. The mold manufacturing apparatus according to claim 14, wherein the roller that exits from the rotor when the drive arm starts half a rotation can be easily removed from the cup surface. 16 indexing means for carrying a plurality of mold containers and indexing them through a plurality of successive different stations; a sand loading station adjacent to the indexing means; a molding station for compressing sand to form a mold with a pattern engaging on at least one side, and further associated with said indexing means for separating the pattern from the mold; and movement through said molding station. a reciprocating plate mounted to transport a sand magazine for conveying a volume of sand from said sand loading station to a molding station; 1. A mold manufacturing device characterized by supporting a pressing head for forming a first surface. 17. A compressed air supply source adjacent to the molding station, the supply supplying compressed air to the top of the sand magazine to convey sand from the sand magazine to a mold container located at the molding station. The mold manufacturing apparatus according to claim 16, characterized in that: 18 The shuttle plate includes a rigid portion that cooperates with a sand loading station to open and close the sand loading station, and that the sand gun is connected between the sand loading station and the molding station. 17. The mold manufacturing apparatus according to claim 16, wherein the mold manufacturing apparatus is capable of back and forth movement.