TWI683710B - Casting moulding machine, sand filling compression unit and moulding method - Google Patents

Abstract

The present invention is a mold making machine, which uses a mold frame and a template that are carried in to mold the mold, and includes: a sand-filled frame having a lower opening that can be connected to the upper opening of the mold frame; a compression head The mechanism has a squeezing plate that can enter and exit the sand filling frame, and a plurality of squeezing feet that pass through the squeezing plate and can be raised and lowered relative to the squeezing plate; a sand-filling hopper, which has the mold sand filled to the mold frame , At least one sand filling port of the molding space formed by the sand filling frame, the pressing head mechanism and the template; and a sand filling nozzle, which is arranged at the side of the sand filling frame and can connect the sand filling port to the molding space.

Description

Casting moulding machine, sand filling compression unit and moulding method

The present disclosure relates to a mold molding machine, a sand filling and compressing unit, and a mold molding method for squeezing mold sand filled in a mold frame to mold the mold.

Conventionally, a mold molding machine that fills mold sand by aeration into a mold frame and squeezes the filled mold sand to mold the mold is known (for example, refer to Patent Document 1).

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2002-1491

However, the device of Patent Document 1 forms a sand filling nozzle on a pressing plate (cover member) (refer to FIG. 5 of Patent Document 1). Therefore, there is a problem that the configuration of the compression foot to the compression plate is limited. When the arrangement of the compression foot on the compression plate is limited, there is a possibility that the effect of the compression foot cannot be fully exerted according to the shape of the template. In the technical field, an excellent molding machine, a sand-filling compression unit, and a molding method for molding molds are desired.

The mold molding machine of one aspect of the present invention uses a mold frame and a template that are carried in to mold the mold, and includes: a sand-filled frame having a lower opening that can be connected to the upper opening of the mold frame; Head mechanism, which has a squeeze plate that can enter and exit the sand filling frame, and a plurality of squeeze feet that penetrate the squeeze plate and can rise and fall relative to the squeeze plate; The mold sand is filled to at least one sand filling port of the molding space formed by the mold frame, the sand filling frame, the squeeze head mechanism and the template; and the sand filling nozzle, which is provided at the side of the sand filling frame and can be filled with sand The mouth communicates with the modeling space.

In another aspect of the present invention, the mold molding machine uses a mold frame and a template that are carried in to mold the mold, and includes: a sand-filled frame having a lower opening that can be connected to the upper opening of the mold frame; A filling frame, which is arranged above the sand filling frame and has a lower opening that can be connected to the upper opening of the sand filling frame; a squeezing head mechanism, which has a squeezing plate that can enter and exit the filling frame, and a through pressure A plurality of squeeze feet that can squeeze the plate and can rise and fall relative to the squeeze plate; the sand-filled hopper has a mold space filled with mold sand to the molding space formed by the mold frame, the sand frame, the filling frame, the compression head mechanism and the template At least one sand filling port; and a sand filling nozzle, which is arranged at the side of the filling frame and can connect the sand filling port to the molding space.

According to one or other aspects of the present invention, the mold molding machine forms a sand filling nozzle in the sand filling frame or the filling frame and communicates with the molding space, and mold sand is filled from the side of the molding space. Therefore, the mold molding machine does not need to consider the configuration of the sand filling nozzle, but adopts the layout of the pressing foot determined from the viewpoint of uniform compression as a whole. Therefore, this mold molding machine can perform excellent mold molding.

In one embodiment, the sand filling nozzle may have an internal flow path that is inclined so as to decrease from the inlet toward the outlet. In this case, since the molding sand is supplied from diagonally above, it is possible to avoid the collision of the molding sand and the squeezing foot that falls corresponding to the unevenness of the template, and as a result, the filling property of the molding sand can be improved.

In one embodiment, the sand filling nozzle may also have an internal flow path where the angle of inclination of the top surface is greater than the angle of inclination of the bottom surface. In this case, since it is not easy to apply squeezing force from the lateral direction to the mold sand in the sand-filling nozzle, the mold sand in the sand-filling nozzle is less likely to be compressed. Therefore, the occurrence of sand clogging can be suppressed.

In one embodiment, at least one sand filling port may have an inclined bottom surface. In this case, the mold sand can be easily supplied to the sand filling nozzle.

In one embodiment, at least one sand filling port may have a bottom surface whose surface is formed of ultra-high molecular weight polyethylene. In this case, it is possible to suppress the adhesion and accumulation of mold sand on the bottom surface.

In one embodiment, the sand-filling hopper may be composed of two chutes at its lower part. In this case, sand filling can be performed from two directions, so compared with the case of sand filling from one direction, The mold sand can be filled uniformly.

In one embodiment, the sand-filled hopper may be composed of two chutes at its lower part, and the sand-filled frame is arranged between the chutes. In this case, the device can be made compact.

In one embodiment, the sand-filled frame may be fixed to the chute. In this case, the driving mechanism of the sand filling frame and the sand filling bucket can be shared.

In one embodiment, the sand-filling hopper may be composed of two chutes at its lower part, and the filling frame is arranged between the chutes. In this case, the device can be made compact.

In one embodiment, the filling frame may be fixed to the chute. In this case, the driving mechanism of the filling frame and the sand filling bucket can be shared.

In one embodiment, the squeeze head mechanism may also be arranged between the chutes. In this case, the device can be made compact.

In one embodiment, the molding machine may include a frame-shaped frame that slides up and down around the outer periphery of the template, and a part of the molding space is formed by the frame-shaped frame. In this case, the pressing can be additionally performed from the template side, so the strength of the outer periphery of the mold is improved, and a uniform mold strength can be obtained.

In one embodiment, it may be configured that the squeeze head mechanism is supported by two cylinders provided with sand boxes, and the squeeze head mechanism is lowered to perform the frame setting step and the squeeze step. Furthermore, in one embodiment, the sand-filling bucket may be connected to a plurality of lifting cylinders, and the plurality of lifting cylinders may be mounted on a lifting support frame, which may be mounted on the piston rod of the sand box setting cylinder Between the upper end.

The sand filling and compression unit of another aspect of the present invention is used in a mold molding machine that molds a mold using a mold frame that is carried in, and fills the mold sand into the molding space, and includes: Sand filling frame, which has a lower opening that can be connected to the upper opening of the mold frame; a compression head mechanism, which has a compression plate that can enter and exit the sand filling frame, and a through compression plate that can be pressed against A plurality of squeezing feet for plate lifting; a sand-filling hopper, which has at least one sand-filling port for filling the molding sand into the molding space formed by the mold frame, the sand-filling frame, the squeeze head mechanism and the template; and the sand-filling nozzle It is installed on the side of the sand filling frame and can connect the sand filling port with the molding space.

Another form of the sand filling and compression unit of the present invention is used in a mold molding machine that molds a mold using a mold frame and a template that are carried in, and the mold sand is filled into the molding space, and is provided with: a sand filling frame, which has It can be connected to the upper opening of the mold frame; the lower opening; the filling frame, which is arranged above the sand filling frame, and has the lower opening that can be connected to the upper opening of the sand filling frame; the pressing head mechanism, which has A squeezing plate that can enter and exit the filling frame, and a plurality of squeezing feet that pass through the squeezing plate and can be raised and lowered relative to the squeezing plate; a sand-filling bucket, which has a mold sand filled to the mold frame, sand filling frame, At least one sand filling port of the molding space formed by the filling frame, the pressing head mechanism and the template; and a sand filling nozzle, which is provided at the side of the filling frame and can connect the sand filling port to the molding space.

Another aspect of the present invention is a mold molding method that uses a mold frame and a template that are carried into a mold molding machine to mold the mold, and is formed by using a mold frame, a sand-filled frame, a compression head mechanism, and a template The step of molding the space, the sand-filling frame has a lower opening that can be connected to the upper opening of the mold frame, the squeezing head mechanism has a squeeze plate that can enter and exit the sand-filling frame, and a through-squeeze plate that can be opposed A plurality of squeezing feet that rise and fall on the squeeze plate; and the step of filling the molding sand into the molding space with a sand filling nozzle, which is installed on the side of the sand filling frame and can be installed on the accumulation molding sand At least one sand filling port of the sand filling bucket is connected to the molding space.

Another aspect of the present invention is a mold molding method that uses a mold frame and a template that are carried into a mold molding machine to mold the mold, and includes: a mold frame, a sand filling frame, a filling frame, a compression head mechanism, and The step of forming the molding space by the template, the sand filling frame has a lower opening which can be connected with the upper opening of the mold frame, the filling frame is arranged above the sand filling frame, And it has a lower opening that can be connected to the upper opening of the sand filling frame. The squeezing head mechanism has a squeezing plate that can enter and exit the filling frame, and a plurality of penetrating squeezing plates that can rise and fall relative to the squeezing plate. A squeeze foot; and the step of filling the molding sand into the molding space with a sand filling nozzle, the sand filling nozzle is arranged at the side of the filling frame, and at least one of the sand filling buckets arranged in the storage molding sand can be installed The sand filling port is connected with the molding space.

According to the sand filling compression unit and the mold molding method described above, the same effect as the mold molding machine described above can be exerted.

According to various aspects of the present invention, an excellent molding machine, a sand-filling compression unit, and a molding method can be provided.

1‧‧‧Chassis frame

2‧‧‧Fixed stop

3‧‧‧Modeling chassis

4‧‧‧Sand box setting cylinder

4A‧‧‧Piston rod

5‧‧‧Model replacement device

6‧‧‧Model holder

6A‧‧‧Model bracket

7‧‧‧Turntable

8‧‧‧Template

8A‧‧‧Template

9‧‧‧Frame frame

10‧‧‧lead pin

11‧‧‧Body frame

12‧‧‧Snap slot

13‧‧‧Snap-in head

14‧‧‧Hydraulic cylinder

15‧‧‧Lift cylinder

16‧‧‧Head

17‧‧‧Elevating support

18‧‧‧Sand filling bucket lifting cylinder

19‧‧‧Sand filling bucket

20‧‧‧sliding brake

21‧‧‧ Sand inlet

22‧‧‧ On-off valve

23‧‧‧Gas supply pipe

24‧‧‧Chute

25‧‧‧Air ejection chamber

26‧‧‧Sand filling port

26a‧‧‧Bottom

27‧‧‧Sand filling frame

27a‧‧‧Outside

27b‧‧‧Inside

27c‧‧‧ Lower opening

28‧‧‧Sand filling nozzle

28a‧‧‧Top

28b‧‧‧Bottom

29‧‧‧Squeeze head mechanism

30‧‧‧Squeeze plate

31‧‧‧ Squeeze foot

32‧‧‧Move in and out of rack

33‧‧‧Mold frame

33a‧‧‧ Upper opening

34‧‧‧Move in and out of conveyor belt

35‧‧‧ block

36‧‧‧Frame frame

37‧‧‧Padding

38‧‧‧Metal component

39‧‧‧ polyurethane rubber

100‧‧‧Mold Molding Machine

200‧‧‧Sand filling compression unit

BF‧‧‧Filling frame

S‧‧‧Molding sand

S10‧‧‧Step

S12‧‧‧Step

S14‧‧‧Step

S16‧‧‧Step

S18‧‧‧Step

FIG. 1 is a longitudinal cross-sectional view showing a state (home position) before the start of the molding machine of the embodiment.

Fig. 2 is a longitudinal cross-sectional view showing a molding machine with a molding space formed.

Fig. 3 is a flow chart of a method for molding a mold.

4 is a longitudinal cross-sectional view of a mold molding machine showing the aerated filling state of mold sand.

5 is a longitudinal cross-sectional view of a mold molding machine showing the state of one-time compression of mold sand.

6 is a longitudinal cross-sectional view of a mold molding machine showing the state of secondary extrusion of mold sand.

7 is a longitudinal cross-sectional view of the mold-molding machine showing the state of demolding of the mold-casting mold and the replenishment of the mold sand.

8 is a longitudinal cross-sectional view of the mold molding machine showing the state where the template (model holder) is replaced.

9 is an enlarged longitudinal sectional view of the sand filling nozzle and the sand filling port on the left side of FIG. 2.

Fig. 10 is a partially enlarged longitudinal sectional view showing another embodiment of the frame-shaped frame.

Fig. 11 is a partially enlarged longitudinal sectional view showing another embodiment in which a molding space is formed.

Hereinafter, the mold molding machine of this embodiment will be described based on the drawings. FIG. 1 is a longitudinal sectional view showing a state (original position) before the start of the molding machine 100 of the embodiment. FIG. 2 is a longitudinal cross-sectional view of the molding machine 100 in a state where a molding space is formed. The mold molding machine 100 is a molding machine that molds a mold using a mold frame and a template that are carried in.

As shown in FIGS. 1 and 2, the molding machine 100 includes, for example, a chassis frame 1. A fixing stopper 2 is fixed to the chassis frame 1. On the left and right sides of the modeling chassis 3 including the chassis frame 1 and the fixed stop 2 (see FIG. 1 ), sand box installation cylinders 4 and 4 are provided upright. The lower part of one of the cylinders 4 and 4 (the left side in FIG. 1) is provided in the flask, and the center of the model changing device 5 can be rotatably supported in a horizontal plane. The main shaft (rotation shaft) of the model changing device 5 is also used as the sand box installation cylinder 4 on the left in FIG. 1.

The model changing device 5 is a device that carries in the template 8. The model replacement device 5 includes a plurality of support units (not shown) including a main shaft, a turntable 7, and model holders 6, 6A. The turntable 7 is supported by the main shaft so as to be rotatable in a horizontal plane, and the model holders 6 and 6A are alternately carried in and out above the center of the modeling chassis 3. The turntable 7 is rotated by an actuator (not shown). The actuator is, for example, a hydraulic cylinder. A plurality of support units are installed on the mounting part of the model holders 6 and 6A of the turntable 7.

The model holder 6 includes a frame-shaped frame 9, a plurality of guide pins 10, a main body frame 11, and an urging mechanism (not shown). The frame-shaped frame 9 surrounds the outer periphery of the template 8 and slides up and down. A plurality of guide pins 10 are connected to the lower part of the frame 9. The body frame 11 is for the guide pin 10 to be slidably inserted up and down, and the template 8 is placed on the upper surface. The elastic pressing mechanism hangs the frame-shaped frame 9 and the main body frame 11 at both ends thereof, so that the elastic pressure acts on the direction in which the frame-shaped frame 9 descends. The urging mechanism is, for example, a plurality of tension coil springs. The model holder 6A has the same structure as the marked model holder 6.

A hydraulic cylinder (oil cylinder) 14 is arranged at the center of the modeling chassis 3. The hydraulic cylinder 14 has an engaging head 13 connected to the upper end of the piston rod. The engaging head 13 is engaged with the engaging groove 12 formed at the center of the lower end of the model holders 6 and 6A. Furthermore, on the modeling chassis 3, in multiple guides Under the pin 10, a plurality of lifting cylinders 15 are arranged. The elevating cylinder 15 elevates the frame 9 through the guide pin 10. A rod head 16 is connected to the upper end of the piston rod of the lift cylinder 15.

When the upper surface of the frame-shaped frame 9 is at the extended end of the lift cylinder 15, it protrudes upward (for example, 30 mm) from the parting surface of the template 8 (see FIG. 2 ). When the upper surface of the frame-shaped frame 9 is at the contracted end of the lift cylinder 15, it becomes substantially flush with the parting surface of the template 8 (see FIG. 1 ).

A lifting support frame 17 is installed between the upper ends of the piston rods 4A of the cylinders 4 and 4 provided in the frame. A plurality of sand-filling bucket lifting cylinders 18 are installed on the lifting support frame 17. The front end of the piston rod of the sand-filling bucket elevator cylinder 18 is connected to the sand-filling bucket 19.

The sand-filled bucket 19 stores mold sand inside. The sand filling bucket 19 is provided with a sand inlet 21 opened and closed by a slide gate 20 at the upper end. The sand-filled hopper 19 is connected to the upper part thereof with an air supply pipe 23 for introducing low-pressure air (for example, 0.05 to 0.18 MPa) through the on-off valve 22. The lower part of the sand filling bucket 19 is composed of two chutes 24. On the inner surface of the chute 24, a plurality of air ejection chambers 25, 25 are provided that communicate with a compressed air source (not shown) via an on-off valve (not shown).

It is formed by spraying low-pressure air (for example, 0.05 to 0.18 MPa) from the plurality of air spray chambers 25 and 25 into the sand filling hopper 19 to form an aeration in which the mold sand S floats and fluidizes. In addition, a sand filling port 26 is provided in the lowermost part of the chute 24 of the sand filling bucket 19.

A sand-filling frame 27 is fixedly arranged inside the lower part of the chute 24. The sand-filled frame 27 has a lower opening 27c that can be connected to the upper opening 33a of the mold frame 33. A sand filling nozzle 28 is formed below the sand filling frame 27 at the lower part (side part). The sand filling nozzle 28 has one end connected to the sand filling port 26 and the other end connected to a molding space described later. Inside the sand filling frame 27, a squeeze head mechanism 29 is arranged. The squeeze head mechanism 29 includes a squeeze plate 30 that can enter and exit the sand-fill frame 27 and a plurality of squeeze feet 31. The plurality of squeezing feet 31 are segmented, and are installed through the squeezing plate 30, and the squeezing plate 30 can be controlled to move up and down. The upper end of the pressing plate 30 is fixed to the lower end of the lifting support 17. The sand filling frame 27 surrounds the squeeze head mechanism 29 so that the outer periphery can move up and down. The squeezing head mechanism 29 is surrounded by the sand filling bucket 19. Squeeze head mechanism 29 is filled with sand The stuffing hopper 19 is surrounded by at least two directions.

The lifting support frame 17 is extended to the position below the squeezing head mechanism 29 via the loading/unloading frame 32, and the loading/unloading conveyor 34 of the mold frame 33 is suspended. By carrying in and out the conveyor belt 34, the mold frame 33 is carried in and out.

As described above, the squeezing head mechanism 29 is supported by the two flask-setting cylinders 4 and 4. The squeezing head mechanism 29 is lowered to perform the frame setting step and the squeezing step.

In addition, the sand-filling compression unit 200 is constituted by the sand-filling frame 27, the squeeze head mechanism 29, the sand-filling bucket 19, and the sand-filling nozzle 28 described above. The sand filling and compression unit 200 is a unit in which the above-mentioned constituent elements are unitized, and can be replaced in units of units.

The operation (mold molding method) of the mold molding machine 100 thus constructed will be described. Fig. 3 is a flow chart of a method for molding a mold. The flowchart shown in FIG. 3 starts from the state of FIG. 1. The state of FIG. 1 is a state where the mold sand S is put into the sand-filling hopper 19, and the empty mold frame 33 is carried into the carrying-in/out conveyor 34. In addition, the model holders 6 and 6A are installed on the model replacement device 5 in a state of being lifted from the modeling chassis 3 by about 5 mm by a compression spring (not shown) in a support unit (not shown). FIG. 1 shows the state in which the model holder 6 is moved into the upper center of the modeling chassis 3. There is a gap of about 5 mm between the upper surface of the fixed stop 2 of the modeling chassis 3 and the lower surface of the model holder 6.

In the state shown in FIG. 1, a frame setting step (S10), which is a step of forming a modeling space, is performed. First, the hydraulic cylinder 14 is contracted to lower the engaging head 13, thereby engaging the engaging groove 12 formed in the central portion of the lower end of the model holder 6 with the engaging head 13. Moreover, the model holder 6 is pulled down against the above-mentioned compression spring (not shown), and the lower surface of the model holder 6 is pressed against the upper surface of the fixed stop portion 2 of the modeling chassis 3. Thereafter, the elevating cylinder 15 is extended and operated to raise the frame-shaped frame 9 via the guide pin 10. As a result, the upper surface of the frame-shaped frame 9 protrudes slightly upward from the parting surface of the template 8.

In addition, in the molding machine for frame setting from bottom to top, the model holder 6 is lifted with a platform at the beginning of the frame setting step. In the lifting step, set a reduction to avoid collision In the case of fast steps, there is a risk that the cycle time becomes longer. On the other hand, in the mold molding machine 100 of the present embodiment, at the beginning of the frame setting step, the model holder 6 can be pressed against the fixed stopper 2 by the hydraulic cylinder 14 while being pulled up from the top The frame setting action ends. Therefore, compared with the previous molding machine with bottom-to-top frame setting, there is no deceleration step at the beginning of the step, so the time required for the deceleration step can be saved and the cycle time can be shortened.

Moreover, after the slide gate 20 is actuated to close the sand inlet 21, the cylinders 4 and 4 of the flask are retracted and actuated. With this, the mold frame 33 is placed on the upper surface of the frame-shaped frame 9 protruding upward from the outer periphery of the template 8. In addition, the sand-filling bucket elevator cylinder 18 extends and operates. As a result, the sand-filling bucket 19 and the sand-filling frame 27 are lowered, and the sand-filling frame 27 is pressed against the upper surface of the mold frame 33 to be in close contact. Furthermore, the squeezing feet 31 each act. The irregularities are formed relative to the irregularities of the template 8 below, and the state shown in FIG. 2 is obtained. In addition, at this time, a molding space is formed by the template 8, the frame 9, the mold frame 33, the sand filling frame 27, and the squeeze head mechanism 29 placed on the model holder 6, and the other end of the sand filling nozzle 28 is The modeling space is connected.

Next, an aeration filling step (S12), which is a step of filling mold sand with aeration, is performed. 4 is a longitudinal cross-sectional view of the mold molding machine 100 showing the aerated filling state of the mold sand. First, low-pressure air is ejected from the plurality of air ejection chambers 25, 25 into the sand-filling hopper 19. As a result, the mold sand S in the sand-filling bucket 19 floats and fluidizes. In this state, low-pressure air is supplied from the air supply pipe 23 to the sand filling hopper 19 via the on-off valve 22. The molding sand S is filled into the molding space by the low-pressure air through the sand filling port 26 and the sand filling nozzle 28 (aeration filling). During aeration filling, the low-pressure air is discharged from the small holes (not shown) of the template 8.

Next, a pressing step (S14) is performed. In the squeezing step, the sand box is provided with cylinders 4 and 4 to contract and act. With this, the sand-filling bucket elevator cylinder 18 contracts. The sand boxes are provided with cylinders 4 and 4 to lower the lifting support frame 17 and the members supported by it (squeezing head mechanism 29, carrying-in/out frame 32, carrying-in/out conveyor belt 34, etc.). In this way, the molding sand S is pressed once until the entire lower surface of the pressing foot 31 is flat, and the state shown in FIG. 5 is obtained. FIG. 5 is a longitudinal cross-sectional view of the mold molding machine 100 showing the state of one-time pressing of mold sand. At this time, the flask is set in the cylinder 4 The contraction action is continued until the pressure force is reached by the pressure sensor (not shown) to the set pressure of one squeeze, or the encoder position (not shown) of the sand box setting cylinder 4 is reached to the first squeeze Up to the set position.

Next, the operating fluid of the lift cylinder 15 is switched to the released state. Moreover, the cylinders 4 and 4 of the sand box are contracted and operated with a higher pressure than the first squeeze. Thereby, the mold frame 33, the sand-filling frame 27, the sand-filling hopper 19, and the squeeze head mechanism 29 are integrally lowered, and the entire mold sand S is squeezed a second time. FIG. 6 is a longitudinal cross-sectional view of the mold molding machine 100 showing the state of secondary extrusion of mold sand. The frame-shaped frame 9 is lowered by the contraction of the lifting cylinder 15, and the upper surface of the frame-shaped frame 9 and the parting surface of the template 8 have approximately the same height. In this way, the strength of the outer periphery of the mold is improved, and a uniform mold strength can be obtained. In addition, when the frame-shaped frame 9 reaches the lowering point and the pressing force does not reach the set pressure of the second pressing, the sand-filling bucket lifting cylinder 18 is contracted to move while the sand box is provided with a cylinder 4, 4 contraction action, thereby further squeezing.

Then, if the squeezing force reaches the set pressure to the second squeeze, the squeeze stabilization timer is activated to maintain the squeeze for a specific time. At this time, in order to correspond to the situation where the frame-shaped frame 9 has not reached the lowering end, the sand-filling hopper lifting cylinder 18 is extended to move the sand-filling frame 27 down, and the mold frame 33 is pressed until the frame-shaped frame 9 reaches the lowering end. Thereby, the lower surface of the mold frame 33 and the lower surface of the mold can be made substantially flush at a time.

Next, a demolding step (S16) is performed. In the demolding step, the lifting cylinder 15 is extended and pressed, and the mold frame 33 is pressed against the sand-filled frame 27 via the guide pin 10 and the frame-shaped frame 9, and the frame setting cylinders 4 and 4 are reversely operated to demold. At this time, the die frame 33, the sand filling frame 27, the sand filling bucket 19, and the squeeze head mechanism 29 are integrally raised. Thereafter, the mold frame 33 after molding and casting is supported and taken out by the lift cylinder 15 via the guide pin 10 and the frame-shaped frame 9. Furthermore, the sand-filling frame 27, the sand-filling bucket 19, and the squeeze head mechanism 29 each rise. In the middle of ascent, the mold frame 33 after the molding and molding is picked up by the carrying-in and carrying-out conveyor belt 34 and completely separated from the template 8. At this time, the sand-filling frame 27 and the sand-filling hopper 19 are moved upward by the contraction of the sand-filling hopper lifting cylinder 18 Rise. Then, after the slide gate 20 is operated in reverse to open the sand inlet 21, the mold sand S is replenished into the sand filling hopper 19, and the state shown in FIG. 7 is obtained. 7 is a longitudinal cross-sectional view of the mold-molding machine 100 showing the state in which the mold-casting mold is demolded and the mold sand is supplied. At this time, the molded casting mold together with the mold frame 33 rises slightly from the stopped state and is released from the mold. In addition, the piston rod 4A of the frame installation cylinder 4 is demolded in the most contracted state. With this, high demolding accuracy can be achieved.

Next, a carry-in/out step (S18) is performed. In the loading and unloading step, the lift cylinder 15 is contracted and moved to lower the guide pin 10 and the frame 9. At this time, by a plurality of tension coil springs (not shown), an elastic pressure acts in the direction in which the frame-shaped frame 9 descends, so that the frame-shaped frame 9 can be reliably lowered to the lower end. Next, the hydraulic cylinder 14 is extended to move the engaging head 13 upward, whereby the compression spring (not shown) in the support unit (not shown) lifts the model holder 6 from the modeling chassis 3 by about 5 mm, releasing the The crimping of the fixed stop 2 of the modeling chassis 3.

Next, the mold frame 33 after the molding and molding is carried out via the carry-in and carry-out conveyor 34, and the empty mold frame 33 is carried in. Furthermore, the model replacement device 5 is actuated by an actuator (not shown) to exchange the template 8 and the template 8A. FIG. 8 is a longitudinal cross-sectional view of the molding machine 100 showing the state after the template (model holder) is replaced. This concludes a series of steps in one of the mold-making methods. In the mold molding method, the above operation is repeated for one cycle. In addition, as the operation of the model replacement device 5, in a work station other than the modeling chassis 3 of the turntable 7, the model holders 6, 6A can also be lifted by a drive roller elevator (not shown) to the left or right or front and rear directions The model holders 6 and 6A are moved in and out and the templates 8 and 8A are replaced. In this way, the mold can be changed during the molding process, and the mold can be changed during the cycle.

The above mold molding machine 100 forms a sand filling nozzle 28 in communication with the molding space in the sand filling frame 27, and fills the molding sand from the side of the molding space. Therefore, the mold molding machine 100 does not need to consider the configuration of the sand filling nozzle 28, but adopts the layout of the pressing foot 31 determined from the viewpoint of uniform compression as a whole. For example, a press foot 31 may be arranged around the mold frame 33 to obtain a more uniform mold strength over the entire surface of the press plate. Therefore, the mold molding machine 100 can perform excellent mold molding.

Next, the details of the sand filling nozzle 28 and the sand filling port 26 will be described. FIG. 9 is an enlarged view of the sand filling nozzle 28 and the sand filling port 26 on the left side of FIG. 2 showing the state where the molding space is formed. In addition, the sand filling nozzle 28 and the sand filling port 26 on the right side are bilaterally symmetrical, so description is omitted.

The sand filling nozzle 28 is formed in the sand filling frame 27. The sand filling nozzle 28 is inclined in such a manner that the inlet formed on the outer side surface 27a of the sand filling frame 27 is lower toward the outlet formed on the inner side surface 27b. According to this configuration, the mold sand S can be filled into the template 8 from diagonally above. Therefore, the filled mold sand S is less likely to collide with the pressing legs 31 that form irregularities with respect to the irregularities of the template 8, thereby improving the filling property of the mold sand S. In addition, a replaceable sand-fill frame gasket can be installed on the inner surface of the sand-fill frame 27. In addition to stainless steel and other steel materials, polyurethane and other materials with high wear resistance can be used as a whole. In this way, it is possible to prevent the abrasion of the sand filling frame.

Furthermore, in the sand filling nozzle 28, the inclination angle of the top surface 28a (30 degrees in this embodiment) is larger than the inclination angle of the bottom surface 28b (15 degrees in this embodiment). According to this configuration, it is not easy to apply a squeezing force from the lateral direction to the mold sand S in the sand filling nozzle 28, so there is an advantage that the mold sand S in the sand filling nozzle 28 is less likely to be compressed. Furthermore, it also has the advantage that it is difficult for the mold sand S in the sand filling nozzle 28 to fall further.

In addition, the sand filling port 26 has an inclined bottom surface 26a. According to this configuration, there is an advantage that the mold sand S passing through the sand filling port 26 is easily introduced into the sand filling nozzle 28. In addition, the inclination angle of the bottom surface 26a is larger than the inclination angle of the bottom surface 28b of the sand filling nozzle 28, and is set to 30 degrees in this embodiment.

Furthermore, the material of the surface of the bottom surface 26a of the sand filling port 26 is made of ultra-high molecular weight polyethylene (for example, "Saxin Newlight" manufactured by Zuoxin Industrial Co., Ltd.). According to this configuration, there is an advantage that it is possible to suppress the adhesion of the mold sand S to the bottom surface 26a and prevent the mold sand S from accumulating. In addition, in the embodiment, the block member 35 formed by processing the ultra-high-molecular-weight polyethylene material is disposed at the most of the chute 24 so that the surface material of the bottom surface 26a becomes the ultra-high-molecular-weight polyethylene. The composition of the lower part. In addition, in the embodiment, the sand filling nozzle 28 system It is installed on the side of the sand filling frame and can be replaced. In addition to the overall use of steel materials, resins such as polymer polyethylene with high wear resistance may also be used as a whole. In addition, a part of the wear-resistant consumables may be thermally sprayed on the steel. With these, the management moldability can be maintained and the nozzle wear can be prevented.

In the mold molding machine 100 of the embodiment, a sand-filling frame 27 is fixed inside the two chutes 24. According to this configuration, the sand-filling frame 27 is raised and lowered together with the sand-filling bucket 18 by the sand-filling bucket elevating cylinder 18, so there is no need for an actuator that directly raises and lowers the sand-filling box 27 itself. Therefore, there is an advantage that the number of actuators can be reduced.

In the mold-molding machine 100 of the embodiment, the model holder 6 is provided so as to include the frame-shaped frame 9 that surrounds the outer periphery of the template 8 and slides up and down, but it is not limited thereto. For example, the frame 9 may be omitted. However, as shown in the above-mentioned embodiment, if the model holder 6 is provided with the frame-shaped frame 9, by the template 8, the frame-shaped frame 9, the mold frame 33, the sand-filled frame 27 and the squeeze placed on the model bracket 6, When the head mechanism 29 forms a molding space, the above-mentioned secondary pressing (pressing from the side of the model) can be performed.

Furthermore, the frame-shaped frame 9 is not limited to those shown in the above-mentioned embodiment. Next, another embodiment of the frame-shaped frame will be described. FIG. 10 is a partially enlarged view showing another embodiment of the frame-shaped frame, and only showing one side symmetrical on both sides. In addition, a state in which the upper surface of the frame-like frame protrudes upward by 30 mm from the parting surface of the template 8 is displayed.

As shown in FIG. 10, the frame-shaped frame 36 is a pad 37 having a removable inner side portion. The pad 37 surrounds the outer periphery of the template 8 and slides up and down. The gasket 37 is configured to fix the urethane rubber 39 to the metal member 38. In addition, as shown in FIG. 10, the material of the upper end surface and inner side surface of the gasket 37 is urethane rubber 39. According to this configuration, when the molding sand S is filled into the molding space, the lower surface of the mold frame 33 is in contact with the urethane rubber 39 on the upper end surface of the gasket 37, so that the lower surface of the mold frame 33 and the frame shape can be improved The sealing of the upper surface of the frame 36 has the advantages of preventing the leakage of the molding sand S from blowing. Furthermore, the polyurethane rubber 39 with the inner surface of the pad 37 can improve the abrasion resistance of the outer surface of the template 8 and the sliding surface in the pad 37 Advantage. In addition, when the gasket 37 having the upper end surface and the inner side surface cannot be installed on the model holder 6, the gasket with the cross-section I type can be installed only on the outer periphery of the template 8. Thereby, the outer wear of the template 8 can also be prevented.

The heat-resistant temperature of the polyurethane rubber 39 may be, for example, 70 to 90°C. In this embodiment, the heat-resistant temperature of the urethane rubber 39 is 80°C. However, if the temperature of the mold frame 33 is assumed to be higher than usual, the heat-resistant temperature of the urethane rubber 39 may also be 110 to 130°C. As an example, the heat-resistant temperature of the urethane rubber 39 is 120°C.

In the mold molding machine 100 of the embodiment, the block member 35 of the processed ultra-high molecular weight polyethylene material is arranged at the lowermost part of the chute 24, but it is not limited to this. For example, instead of the block member 35, an air ejection chamber 25 may be provided so that the aforementioned low-pressure air is ejected from the bottom surface 26a of the sand filling port 26.

In addition, in the mold molding machine 100 of the embodiment, since sand filling is performed by low-pressure air, uniform sand filling can be performed. Sand filling by low-pressure air is more low-pressure (for example, 0.05 to 0.18 MPa) than sand filling by spraying (for example, 0.2 to 0.5 MPa), and can be filled with sand at a low speed, so it has the characteristics of less wear of the model .

Sand filling by spraying method Because the sand filling speed is relatively fast, blocking phenomenon will occur particularly in the groove portion, and the sand filling property is reduced. On the other hand, in the mold molding machine 100 of this embodiment, it can also be set to slow down the sand filling speed by the electro-pneumatic proportional valve at the initial stage of low-pressure air to improve the filling property and increase the pressure from the middle to shorten Fill time. If the pressure is kept low, the filling speed becomes slow, which may take time to fill the sand and increase the cycle time. If high-speed molding is desired and wear is reduced, it is preferable to set the filling speed of the low-pressure air to be slower in the initial stage and set the filling speed to high speed from the middle.

In the mold molding machine 100 of the above embodiment, the sand filling nozzle 28 is provided in the sand filling frame 27. However, in other embodiments, as shown in FIG. 11, it may be provided separately from the sand filling frame 27, and the sand filling nozzle 28 may be provided on the filling frame BF which can be operated separately. In this case, the sand filling nozzle 28 can have a simple structure and can be easily replaced. another, If so, an exhaust port (not shown) for low-pressure air can be provided in the sand-filling frame 27, and the low-pressure air can be discharged from the place, so that it can have effects such as more excellent filling. In addition, there may be one sand filling port.

1‧‧‧Chassis frame

2‧‧‧Fixed stop

3‧‧‧Modeling chassis

4‧‧‧Sand box setting cylinder

4A‧‧‧Piston rod

5‧‧‧Model replacement device

6‧‧‧Model holder

6A‧‧‧Model bracket

7‧‧‧Turntable

8‧‧‧Template

8A‧‧‧Template

9‧‧‧Frame frame

10‧‧‧lead pin

11‧‧‧Body frame

12‧‧‧Snap slot

13‧‧‧Snap-in head

14‧‧‧Hydraulic cylinder

15‧‧‧Lift cylinder

16‧‧‧Head

17‧‧‧Elevating support

18‧‧‧Sand filling bucket lifting cylinder

19‧‧‧Sand filling bucket

20‧‧‧sliding brake

21‧‧‧ Sand inlet

22‧‧‧ On-off valve

23‧‧‧Gas supply pipe

24‧‧‧Chute

25‧‧‧Air ejection chamber

26‧‧‧Sand filling port

27‧‧‧Sand filling frame

27c‧‧‧ Lower opening

28‧‧‧Sand filling nozzle

29‧‧‧Squeeze head mechanism

30‧‧‧Squeeze plate

31‧‧‧ Squeeze foot

32‧‧‧Move in and out of rack

33‧‧‧Mold frame

33a‧‧‧ Upper opening

34‧‧‧Move in and out of conveyor belt

100‧‧‧Mold Molding Machine

200‧‧‧Sand filling compression unit

S‧‧‧Molding sand

Claims (16)

A mold molding machine that molds a mold using a mold frame and a template that is carried in, and includes: a sand-filled frame including a lower opening that can be connected to the upper opening of the mold frame; a squeeze head mechanism, It includes a squeeze plate that can enter and exit the sand filling frame, and a plurality of squeeze feet that pass through the squeeze plate and can move up and down relative to the squeeze plate; a sand-filling hopper, which includes filling the mold sand to At least one sand filling port of the molding space formed by the mold frame, the sand filling frame, the pressing head mechanism, and the template; and a sand filling nozzle, which is provided at the side of the sand filling frame and can fill the sand The mouth is in communication with the molding space; and the lower part of the sand-filling hopper system is composed of two chutes, and the sand-filling frame is arranged between the chutes. A mold molding machine that molds a mold using a mold frame and a template that is carried in, and includes: a sand-filled frame including a lower opening that can be connected to the upper opening of the mold frame; a filling frame, which is configured Above the sand filling frame, and includes a lower opening that can be connected to the upper opening of the sand filling frame; a squeezing head mechanism, which includes a squeezing plate that can enter and exit the squeezing frame, and the squeezing through A plurality of squeezing feet that can be raised and lowered relative to the squeezing board; a sand-filling hopper, which includes filling the mold sand with the mold frame, the sand-filling frame, the filling frame, the squeeze head mechanism, and the template At least one sand filling port of the formed molding space; and a sand filling nozzle, which is provided at the side of the filling frame, and can connect the sand filling port to the molding space; and The lower part of the sand filling bucket system is composed of two chutes, and the filling frame is arranged between the chutes. A mold molding machine as claimed in claim 1 or 2, wherein the sand filling nozzle is inclined so as to become lower from the inlet to the outlet. The mold molding machine of claim 3, wherein the inclination angle of the top surface of the sand filling nozzle is greater than the inclination angle of the bottom surface. The mold molding machine according to claim 1 or 2, wherein the at least one sand filling port has an inclined bottom surface. The molding machine of claim 5, wherein the at least one sand filling port has a bottom surface whose surface is formed of ultra-high molecular weight polyethylene. The mold molding machine as claimed in claim 1, wherein the sand filling frame is fixed to the chute. The mold molding machine as claimed in claim 2, wherein the filling frame is fixed to the chute. The mold molding machine as claimed in claim 1 or 2, wherein the above-mentioned extrusion head mechanism is disposed between the above-mentioned chutes. A casting molding machine as claimed in claim 1 or 2, which includes a frame-shaped frame that surrounds the outer periphery of the template and slides up and down, and a part of the molding space is formed by the frame-shaped frame. The casting molding machine of claim 1 or 2, wherein the above-mentioned extrusion head mechanism is supported by two frame setting cylinders, and the extrusion head mechanism is lowered to perform the frame setting step and the pressing step. The casting molding machine as described in claim 11, wherein the sand-filling bucket is connected to a plurality of lifting cylinders, and the plurality of lifting cylinders It is installed on an elevating support frame, which is installed between the upper ends of the piston rods of the frame setting cylinder. A sand filling and compressing unit, which is used for a mold molding machine for molding molds using a mold frame that is carried in, and for filling mold sand into a molding space, and includes: a sand filling frame, which includes the mold frame The opening is connected to the lower opening; a squeeze head mechanism, which includes a squeeze plate that can enter and exit the sand filling frame, and a plurality of squeeze feet that penetrate the squeeze plate and can be raised and lowered relative to the squeeze plate; A sand-filling hopper, which includes at least one sand-filling port for filling mold sand into the molding space formed by the mold frame, the sand-filling frame, the squeeze head mechanism, and the template; and a sand-filling nozzle, which is provided at The side part of the sand filling frame can connect the sand filling port with the molding space; and the lower part of the sand filling bucket system is composed of two chute, and the sand filling frame is arranged between the chute. A sand filling and compression unit, which is a mold molding machine for molding a mold using a mold frame and a template that is carried in, and the mold sand is filled into the molding space, and includes: a sand filling frame, which includes the mold frame The upper opening is connected to the lower opening; the filling frame is arranged above the sand filling frame and includes a lower opening that can be connected to the upper opening of the sand filling frame; the pressing head mechanism includes A squeezing plate that enters and exits the filling frame, and a plurality of squeezing feet that pass through the squeezing plate and can move up and down relative to the squeezing plate; a sand-filling hopper, which includes filling the mold sand with the mold frame and the filling At least one sand filling port of the molding space formed by the sand frame, the filling frame, the pressing head mechanism, and the template; and a sand filling nozzle, which is provided on the side of the filling frame and can charge the sand The filling port is in communication with the molding space; and the lower part of the sand filling bucket system is composed of two channels, and the filling frame is arranged between the channels. A mold molding method, which uses a mold frame and a template carried into a mold molding machine to mold the mold, and includes: using the mold frame, the sand filling frame, the pressing head mechanism, and the template to form a molding space Step; the sand-filling frame includes a lower opening that can be connected to the upper opening of the mold frame; the squeezing head mechanism includes a squeezing plate that can enter and exit the sand-filling frame, and the squeezing plate that penetrates and can be opposed A plurality of squeezing feet that rise and fall on the squeeze plate; and the step of filling the molding sand with the sand filling nozzle into the molding space; the sand filling nozzle is provided on the side of the sand filling frame and can be placed in the storage At least one sand filling port of the sand-filling hopper for accumulating mold sand is in communication with the molding space; the lower part of the sand-filling hopper is composed of two chutes, and the sand-filling frame is arranged between the chutes. A mold molding method, which uses a mold frame and a template carried into a mold molding machine to mold the mold, and includes: using the mold frame, sand filling frame, filling frame, squeezing head mechanism, and the template The step of modeling the space; the sand filling frame includes a lower opening that can be connected to the upper opening of the mold frame; the filling frame is disposed above the sand filling frame and includes an opening that can be connected to the sand filling frame The lower opening is connected; a squeeze head mechanism, which includes a squeeze plate that can enter and exit the filling frame, and a plurality of squeeze feet that pass through the squeeze plate and can be raised and lowered relative to the squeeze plate; and use sand The step of filling the molding sand into the molding space with the filling nozzle; the sand filling nozzle is provided at the side of the sand filling frame, and at least one sand filling port provided in the sand filling bucket for storing the mold sand can be installed, and The above modeling space is connected; The lower part of the sand filling bucket system is composed of two chutes, and the filling frame is arranged between the chutes.

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