JPH09300323A - Cast molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attempt reduction of maintenance inspection cost by a simple structure by a method wherein the life of a molding tool can be lengthened by enabling the molding tool to be thoroughly fastened by considering a slight mutual positional shift between molding tools without requiring highly precise parallelism for both back faces of the molding tools. SOLUTION: A fluid pressurezing apparatus 23 is arranged by being equipped with a diaphragm 27 expanding by fluid pressure so as to pupsh in a fastening direction both molding tools 12, 12 between mutual adjacent molding tools 12, 12 by putting together a plurality of sets of the cast molding tool 12 consisting of a plurlaity of split tools 13, 14 forming a casting space S by registering. The diaphragm 27 expands intensively areas opposed to matched areas 13d, 14d of the split tools 13, 14. A fixing head abutting against one end part of a tool group consisting of a plurality of the molding tools 12, and an adjustable head locking by transferring from a mold open position to a mold closed position abutting against the other end part of the tool group are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cast molding apparatus for producing a cast product such as sanitary ware body.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, there is a cast-molding apparatus 1 in which a plurality of sets of cast-molding dies 2, 2 ... Are connected so that a plurality of cast-molded articles W can be simultaneously cast-molded.
Each molding die 2 is composed of split dies 3 and 4 which are guided by guide rails 5 on both sides and can freely come into contact with and separate from each other. Split type 3, 4
Is a water-permeable filter layer 3 inside the steel frames 3a, 4a.
b and 4b are formed.

At the time of casting, the casting dies 2, 2, ... Combining the split dies 3, 4 are connected in a line, and both ends of the casting dies 2, 2 ... Connected are fixed head 6 and movable head. 7, and the movable head 7 is pressed by a large hydraulic cylinder 8 to clamp the mold. In this state, in each of the molding dies 2, sludge is supplied to the casting space S formed inside the filtration layers 3b and 4b, and the castings W are formed by the dehydration of the sludge by the filtration layers 3b and 4b. . When the cast molded product W is demolded, the movable head 7 is retracted by the hydraulic cylinder 8 and the split molds 3 and 4 of each molding mold 2 are separated.

[0004]

It is necessary for each mold 2 to be in close contact with each other so that the slurry does not leak from the mold-matching surfaces 3d and 4d of the filtration layers 3b and 4b when the split molds 3 and 4 are combined. To this end, each molding die 2 has both rear surfaces 3c, 4c of the divided dies 3, 4 in a combined state so that the rear surfaces of the pair of split dies 3, 4 are evenly pressed by the adjacent molding dies 2.
Must be cut with a milling machine and the parallelism between both back surfaces 3c and 4c must be accurately obtained.

However, cutting both back surfaces 3c and 4c of the split molds 3 and 4 in a combined state with a milling machine requires a lot of labor and cutting cost, and therefore there is a problem that the casting cost increases. . Further, when there is play between the guide rail 5 and the molding die 2, the molding dies 2 and 2 adjacent to each other may be misaligned, and the molding dies 2 may not be uniformly pressed. May cause defective molding.

Further, the use of the large hydraulic cylinder 8 for the mold clamping causes a problem that the size of the entire molding apparatus becomes large and the cost of maintenance and inspection rises.

Therefore, in order to solve the above-mentioned problems, the invention according to claim 1 does not require high-precision parallelism on both back surfaces of a pair of molding dies, and the molding dies adjacent to each other may be slightly different in position. It is an object of the present invention to provide a cast molding apparatus capable of performing complete mold clamping even if there is a deviation. It is an object of the present invention to provide a cast molding apparatus capable of extending the life of the molding die. A third aspect of the present invention has an object to provide a cast molding apparatus having a simple structure and capable of reducing maintenance and inspection costs.

[0008]

The gist of the present invention as set forth in claim 1 is, in a cast-molding apparatus for connecting a plurality of sets of a cast-molding die composed of a plurality of split dies which form a casting space by adjoining the molds, are adjacent to each other. A casting molding apparatus characterized in that a fluid pressurizing device having a diaphragm that expands with a fluid pressure so as to press both casting molds in a mold clamping direction is arranged between the casting molds. . According to the present invention, even if the parallelism between the two back surfaces of a pair of molding dies is not obtained, and even if there is a slight misalignment between adjacent molding dies, the state of both back surfaces of each molding die Since the diaphragm expands and deforms in accordance with the above, both molds can be clamped. Further, since the fluid pressure supplied to the diaphragm is pressed, uniform compressive stress is generated on the pressing surface of the diaphragm, and the mold can be uniformly pressed and clamped.

The gist of the present invention according to claim 2 is the cast-in molding apparatus according to claim 1, wherein the diaphragm concentrates and expands a region facing the mold matching surface region of the split mold. According to the present invention, since the die-matching surface area which is strong in strength is selectively pressed, it is possible to avoid the strong pressing to the weak-strength portion forming the casting space and to prolong the life of the molding die.

According to a third aspect of the present invention, there is provided a fixed head which comes into contact with one end of a mold group including the plurality of sets of casting molds, and a mold closing which comes into contact with the other end of the mold group from a mold open position. The cast molding apparatus according to claim 1 or 2, further comprising a movable head that moves to a position and locks. In the present invention, by simply locking the movable head at the mold closing position,
The movable head can receive the reaction force due to the expansion of the diaphragm.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a casting molding apparatus according to the present invention will be described based on the embodiments shown in FIGS. 1 to 9. FIG. 1 is a side view of the casting molding apparatus showing a state during casting in which the intermediate portion is omitted, FIG. 2 is a side view of the casting molding apparatus showing a state of being in the process of being removed from the mold, and FIG. A side view of a unit in which a split type and a fluid pressurizing device having a diaphragm are combined, (A) of FIG. 4 is a front view of the unit, and (B) of FIG. 4 is a line of (A). FIG. 5 is a plan view of the split mold and the fluid pressurizing device, FIG. 5 is an enlarged cross-sectional view of the combined split molds, and FIG. 6 is a side view of the other split mold mounted on a carriage. 8 is a front view of the other split mold mounted on the dolly, FIG. 8A is a front view of a separation moving device that separates and moves the mold, FIG. 8B is a plan view of the separator, and FIG. It is the side view which abbreviate | omits a part which shows the moving device for movable heads.

In the following description, "front" means the left side of FIGS. 1, 2, 3, 5, 6, and 9, and "rear" means the right side of these figures. Furthermore, "left" is shown in FIG.
(A), the left side of FIG. 7 and FIG. 8 (A), and "right" means the right side of these figures.

As shown in FIG. 1, the cast molding apparatus 11 has a
Fixed heads 15 and 16 on both front and rear sides and fixed head 1
Fixed heads 15 and 1 on the left and right above and below the left and right
Four guide rails 18 that connect the six to each other, and a movable head 17 that is guided by these guide rails 18 and moves back and forth.
Is disposed between the fixed head 15 and the movable head 17 and two tracks 20 and 21 (see FIGS. 4 and 7) provided on the joint frame 19 which is connected to the lower left and right of the fixed head 15 and 16. In addition, a plurality of sets of casting molds 12 that are guided by the tracks 20 and 21 and move in the front-rear direction are provided.

Each of the casting molds 12 has a split mold 13,
14 A fluid pressurizing device 23 is arranged between the adjacent molds 12, 12. As shown in FIG. 5, the split molds 13 and 14 constituting the set of casting molds 12 are provided with water-permeable filter layers 13b and 14b inside the steel frames 13a and 14a, and the molds are matched. At this time, the casting space S is formed inside the filtration layers 13b and 14b.

The split mold 13 and the fluid pressurizing device 23 are
As shown in FIGS. 3, 4 and 5, it is removably mounted on and integrated with a carriage 24 guided by the track 20.
The fluid pressurizing device 23 is provided between the two sandwiching plates 25 and 26.
A diaphragm 27 made of a rubber bag or the like is sandwiched. The two holding plates 25 and 26 are connected by four connecting pins 28 so that they can be separated from and contacted with each other, and the springs 29 and 29 externally fitted to the connecting pins 28 hold the diaphragm 27 in a direction to compress the diaphragm 27. I am doing it. The holding plate 26 is adapted to contact the back surface 13d of the split mold 13. The holding plate 25 can be brought into contact with the back surface 14d (see FIG. 5) of the split mold 14.

The diaphragm 27 is composed of split dies 13,1.
The central portion facing the casting space S formed by the mold matching of No. 4 is jointed 30 so as not to expand, so that the areas of the split molds 13, 14 facing the mold matching surface areas 13d, 14d are expanded in a concentrated manner. I am doing it. When a pressurized fluid such as water flows into the diaphragm 27, the diaphragm 27 expands against the repulsive force of the spring 29 to separate the holding plates 25 and 26 from each other, thereby selecting the mold matching surface regions 13d and 14d that are strong in strength. Of the molding die 12 is prevented by virtue of strong pressing to a weakly strong portion forming the casting space S (particularly, a portion forming the center of the casting space S) to extend the life of the molding die 12. There is.

The other split mold 14 of the casting mold 12
6 is detachably mounted on a carriage 31 guided by the track 21 as shown in FIGS. The carriage 31 and the carriage 24 (see FIGS. 3 and 4) are provided with engaging portions 32 and 33 on the left and right sides thereof, respectively, so that the split molds 13 and 14 can be easily separated.

As shown in FIGS. 1 and 2, the movable head 17 is guided between the guide rails 18, 18 and a highly rigid head main body 35 which is arranged between the left and right guide rails 18, 18 and is movable back and forth. .. mounted on the left and right sides of the head main body 35, and four sets of locking devices 37 mounted on the left and right sides of the head main body 35.

Each locking device 37 includes a vertically movable slidable locking pawl 39 guided by a guide tool 38 mounted on the head main body 35, and a cylinder 40 for vertically moving the locking pawl 39.
The movable head 17 can be locked at the mold clamping position by engaging the locking claw 39 with the groove 18a provided in the guide rail 18. Each guide rail 18 has a plurality of concave grooves l so that the locking position of the movable head 17 can be changed according to the number of forming molds 12 connected to each other.
8a is recessed for each predetermined pitch. The fluid pressure device 23 is attached to the movable head 17 as necessary.

As shown in FIG. 9, the moving device 42 for moving the movable head 17 from the mold clamping position (see FIG. 1) to the demolding position (see FIG. 2) provides the head main body 35 with a stroke corresponding to the movement. The output shaft 43a is connected to the cylinder 43, and the connector 46 joined to the cylinder 43 is connected to the brackets 45, 45 of the fixed frame 44. A plurality of sets of brackets 45, 45 are attached to the fixed frame 44 for each predetermined pitch, and the forming dies 12 are connected to each other.
The connecting position of the connector 46 can be changed according to the number of sets.

The separating / moving device 47 for separating the split molds 13 and 14 of the molding dies 12 of each set after the casting and moving the split dies 14 to the demolding position (see FIG. 2) is shown in FIG.
As shown in (A) and (B), the upper guide rails 18, 18
The hanging frame 48 that moves back and forth under the guidance of the hanging frames, and the separating tools 49, 49 attached to the lower left and right ends of the hanging frame 48.
And a transfer device 56 (see FIG. 9) that transfers the hanging frame 48 from the casting position to the demolding position of each molding die 12. The hanging frame 48 includes guide rails 18 and 1.
The rollers 36, 36 ... Guided by 8 are attached.

Each separating tool 49 has a fixed frame 50 joined to the hanging frame 48, and a movable frame 5 guided by the fixed frame 50 to move in the left-right direction (arrow D direction).
3, an engaging tool 52 attached to the tip of a cylinder 51 fixed to the moving frame 53 and reciprocating in the left-right direction.
An engagement tool 55 that is attached to the tip of a cylinder 54 fixed to the moving frame 53 and moves in the front-back direction (arrow E direction).
And

The carrying device 56 (see FIG. 9) for carrying the hanging frame 48 is stretched over a fixed frame 44 extending in the front-rear direction and has a chain 57 having both ends connected to the hanging frame 48, and a chain. The geared motor 58 drives the gear 57. By controlling the rotation speed of the geared motor 58, the hanging frame 48 is moved from the corresponding casting position of the molding die 12 to the demolding position.

The separating / moving device 47 operates as follows. First, when the suspension frame 48 is in the casting position, the moving frame 53 of each separating tool 49 is moved forward from the standby position to the separating operation position, so that the engaging parts 33, 33 of the carriage 31 are engaged with each other. 55 is inserted and engaged, and in parallel with this, the engagement portion 52 is advanced from the standby position by the cylinder 51 to engage the engagement portion 52 with the engagement portion 32 of the carriage 24.
Next, the engagement tool 55 is moved forward by the cylinder 54 of the separating tool 49 to separate the carriages 24 and 31 from each other, and the split molds 13 and 14 are separated.

Subsequently, the engagement tool 52 is retracted to the standby position by the cylinder 51 of the separation tool 49 to release the engagement of the engagement tool 52, and then the engagement tool 55 and the engagement portion 33 are engaged with each other. While the suspension frame 48 is maintained, the hanging frame 48 is moved to the demolding position by the transfer device 56 (see FIG. 9), and only the split mold 14 is moved to the demolding position as shown in FIG. To be able to. Finally, the moving frame 53 is retracted from the separating operation position to the standby position, and the hanging frame 48 is separated from the demolding position and then the molding die 1 to be separated and moved.
Prepared for the next separation / movement by retracting to the pouring position of No.2.

The procedure of the cast molding method using the cast molding apparatus 11 having the above structure will be described. First, each trolley 2
Split molds 13 and 14 are placed on 4, 31 (see FIGS. 4 and 7) to prepare a plurality of sets of molds 12. Next, the cylinder 43 of the moving device 42 (see FIG. 9) is operated to move the movable head 17 forward to the mold clamping position shown in FIG. 1 to connect a plurality of sets of molding dies 12. Continuously, a pressurized fluid is supplied to the diaphragm 27 of each fluid pressurizing device 23, the molds 12 of all the sets are clamped, and the split molds 13 and 14 of each mold 12 are matched with each other to be ready for casting. To

Continuing further, the casting space S of each forming die 12
Slurry is supplied to and the sludge is cast and molded. When the cast molding is completed, the diaphragm 2 of each fluid pressurizing device 23
After discharging the pressurized fluid from 7, the cylinder 43 of the moving device 42 (see FIG. 9) is operated to retract the movable head 17 to the standby position shown in FIG. Next, the separation moving device 47
Is operated to separate the split molds 13 and 14 of the molds 12 of each set and move the split mold 14 to the demolding position.
While the split mold 14 is moving to the demolding position, the cast molding W is demolded by a robot (not shown) or the like. The mold 12 is separated and moved from the movable head 17 to the fixed head 1.
Go to 5 and perform sequentially.

When all the demolding is completed, the moving device 4
The movable head 1 is operated by operating the second cylinder 43 (see FIG. 9).
7 is again advanced to the mold clamping position shown in FIG. 1, and the next cast molding is performed.

Operation of the cylinder 43 of the moving device 42,
The operation of supplying / discharging the pressurized fluid to / from the diaphragm 27 of each fluid pressurizing device 23, the operation of supplying / discharging the sludge from each mold 12 and the operation of separating / moving the separating / moving device 47 are performed manually or by a sequencer. It can be automatically performed according to a program (not shown).

As described above, the casting molding apparatus 11 includes the rear surfaces 13d, 13d of the split molds 13 and 14 constituting each molding die 12, respectively.
Even if the parallelism of 14d (see FIG. 5) does not appear, and even if there is a slight misalignment between the adjacent molds 12, 12, depending on the state of both back surfaces 13d, 14d of each mold 12, As a result, the diaphragm 27 of each fluid pressurizing device 23 expands and deforms, so that the mold 12 can be completely clamped. Further, since the pressure is applied by the fluid pressure supplied to the diaphragm 27, uniform compressive stress is generated on the pressing surface of the diaphragm 27, and the mold 12 can be securely clamped.

[0031]

As described above in detail, the casting apparatus according to the present invention has the following excellent effects. According to the first aspect of the present invention, since the mold is clamped by the expansion deformation of the diaphragm, it is not necessary to finish the both end surfaces of the mold so as to obtain highly accurate parallelism, and the casting cost can be reduced and the mold can be formed. Even if there is a slight misalignment, there is no mold clamping defect, so the yield of casting can be dramatically improved.

According to the second aspect of the present invention, since the die-matching surface area which is strong in strength is selectively pressed to avoid a strong pressure to a weak point in strength which forms a casting space, the life of the molding die is reduced. The molding cost can be reduced by increasing the length.

According to the third aspect of the present invention, the reaction force associated with the expansion of the diaphragm can be received by the movable head only by locking the movable head at the mold closing position, and a large hydraulic cylinder is not required. The structure of the entire device is simplified, and maintenance and inspection costs can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a cast molding apparatus according to the present invention, in which a state during casting is omitted in the middle.

FIG. 2 is a partially omitted side view showing a state in which the molding apparatus is in the process of demolding.

FIG. 3 is a side view of a unit in which one split mold mounted on a trolley and a fluid pressurizing device including a diaphragm are combined.

FIG. 4A is a front view of the unit, and FIG. 4B is a plan view of the split type and the fluid pressurizing device taken along the line EE of FIG.

FIG. 5 is an enlarged cross-sectional view of a state in which a split mold in which the molds are combined is clamped.

FIG. 6 is a side view of the other split mold mounted on a trolley.

FIG. 7 is a front view of the other split mold mounted on a trolley.

FIG. 8A is a front view of a separating and moving device that separates and moves a molding die, and FIG. 8B is a plan view of a separating tool.

FIG. 9 is a partially omitted side view showing a moving device for a movable head.

FIG. 10 is a side view of a conventional cast molding apparatus.

[Explanation of symbols]

 S ... Casting space 12 ... Casting mold 13, 14 ... Split mold 15 ... Fixed head 17 ... Movable head 23 ... Fluid pressurizing device 27 ... Diaphragm

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor: Shinohara Ensei 3-1, Oso Town, Tokoname City, Aichi Prefecture Makino Co., Ltd.

Claims (3)

[Claims] 1. A casting molding apparatus in which a plurality of sets of casting dies each including a plurality of split dies that form a casting space by combining the dies are connected to each other, and both casting dies are clamped between adjacent casting dies. A cast-in molding apparatus, wherein a fluid pressure device including a diaphragm that expands by fluid pressure so as to press in a direction is provided. 2. The diaphragm centrally expands a region facing the mold matching surface region of the split mold.
The cast molding apparatus described. 3. A fixed head that abuts against one end of a mold group consisting of the plurality of sets of casting molds, and a movable head that moves and locks from a mold open position to a mold closed position abutting the other end of the mold group. The cast molding apparatus according to claim 1 or 2, further comprising: