TWI682818B - Molding machine - Google Patents

Abstract

The mold molding machine 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 and a side portion that can be connected to the upper opening of the mold frame Squeeze 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; a sand-filled hopper, which has a 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 pressing head mechanism and the template; and a sand filling nozzle formed on the sand filling detachably A member of the opening of the side of the frame, and can connect the sand filling port with the molding space.

Description

Molding machine

The present disclosure relates to a molding machine for molding a mold by squeezing the mold sand filled in the mold frame.

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 mold molding machine described in Patent Document 1 has parts that wear out depending on the period of use or frequency of use. The worn parts may affect the quality of the mold or casting. In this technical field, an excellent molding machine for molding molds is desired.

A casting mold molding machine according to 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, and The side of the opening; a squeezing head mechanism having 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 rise and fall relative to the squeezing plate; , Which has at least one sand filling for filling the molding sand into the molding space formed by the mold frame, the sand filling frame, the pressing head mechanism and the template Mouth; and a sand filling nozzle, which is a member formed in an opening detachably mounted on the side of the sand filling frame, and can connect the sand filling port with the molding space.

According to the molding machine of one aspect of the present invention, even when the sand filling nozzle wears out, only the member formed with the sand filling nozzle can be replaced. Therefore, this mold molding machine is excellent in maintainability and usability.

Another aspect of the present invention is a mold molding machine that molds a mold using a mold frame and a template that are carried in, and includes: a sand-filled frame having a lower opening that can be connected to the upper opening of the mold frame; The filling frame 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 pressing head mechanism has a pressing plate that can enter and exit the filling frame, And a plurality of squeezing feet that penetrate the squeezing plate and can rise and fall relative to the squeezing plate; a sand-filling hopper, which has a mold sand filled by the mold frame, the sand filling frame, the filling frame, and the pressing At least one sand filling port of the molding space formed by the head mechanism and the template; and a sand filling nozzle, which is formed at the side of the filling frame, and can connect the sand filling port to the molding space.

According to another aspect of the present invention, the molding machine can replace only the filling frame formed with the sand filling nozzle even when the sand filling nozzle wears out. Therefore, the moldability is excellent in maintainability and usability.

In one embodiment, the molding machine may also include: a frame-shaped frame that forms a part of the molding space and surrounds the outer periphery of the template and slides up and down; and a liner that is configured to be inside the frame-shaped frame Department loading and unloading. In this case, the gasket disposed between the frame-shaped frame and the template can reduce the wear of the frame-shaped frame and the template.

In one embodiment, the gasket may be made of polyurethane rubber for its upper end surface and inner side surface. In this case, the wear can be further reduced.

In one embodiment, the heat-resistant temperature of the polyurethane rubber may be 70 to 90°C. Furthermore, in one embodiment, the heat-resistant temperature of the urethane rubber may be 110 to 130°C.

According to various aspects of the present invention, an excellent molding machine for molding a mold 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

27‧‧‧Sand filling frame

27A‧‧‧Sand filling frame

27c‧‧‧ Lower opening

27d‧‧‧ opening

27e‧‧‧ opening

27f‧‧‧Exhaust

28‧‧‧Sand filling nozzle

28A‧‧‧Sand filling nozzle

28B‧‧‧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

35‧‧‧ block

36‧‧‧Frame frame

37‧‧‧Padding

38‧‧‧Metal component

39‧‧‧ polyurethane rubber

50A‧‧‧component

50B‧‧‧component

100‧‧‧Mold Molding Machine

BF‧‧‧Filling frame

S‧‧‧Molding sand

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

FIG. 2 is a longitudinal cross-sectional view showing a molding machine in a state where a molding space is formed.

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

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

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

6 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.

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

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

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

Fig. 10 is a partially enlarged longitudinal sectional view showing another embodiment of forming a molding space.

Fig. 11 is a cross-sectional view of a sand filling frame in a modification.

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 a 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. Set in sand box One side of the cylinders 4 and 4 (the left side in FIG. 1) is in a lower position, and the center portion of the model changing device 5 is 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 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, a plurality of lift cylinders 15 are arranged below the plurality of guide pins 10 on the modeling chassis 3. 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 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. The squeezing head mechanism 29 is surrounded by the sand filling hopper 19 from 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.

The operation of the mold making machine 100 thus constructed will be described. The state of FIG. 1 is in a state where the mold sand S is put into the sand filling hopper 19, and the empty mold frame 33 is carried in to the carrying-in/out conveyor 34. In addition, the model holders 6, 6A are supported by a support unit (not shown) The compression spring (not shown) inside is set on the model changing device 5 in a state where it is lifted 5 mm from the modeling chassis 3. 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 model holder 6.

In the state shown in FIG. 1, the hydraulic cylinder 14 is contracted to move down the engaging head 13, thereby engaging the engaging head 13 with the engaging groove 12 formed at the center of the lower end of the mold holder 6. 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, when the deceleration step is set to avoid collision, there is a possibility 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.

Then, sand filling is performed by aeration. Figure 3 shows the aerated filling state of the mold sand A longitudinal cross-sectional view of the mold making machine 100. 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 of the template 8 (not shown).

Next, the flasks are provided with cylinders 4 and 4 to contract and operate. 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 components supported thereby (squeeze 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 becomes flat, and the state shown in FIG. 4 is obtained. FIG. 4 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 shrinking action of the sand box setting cylinder 4 continues until the pressure force is reached by the pressure sensor (not shown) to the set pressure of one squeeze, or the encoder position of the sand box setting cylinder 4 ( (Not shown) until it reaches the set position of one squeeze.

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. 5 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 lower end and the pressing force does not reach the set pressure of the second pressing, the sand-filling bucket lifting cylinder 18 is contracted and operated, and the sand box is further 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 not to reach the frame-like frame 9 to descend Corresponding to the situation at the end, the sand-filling bucket elevating cylinder 18 is extended to lower the sand-filling frame 27, 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, while the elevating cylinder 15 is extended and operated, the sand-filled frame 27 is pressed against the mold frame 33 via the guide pin 10 and the frame-shaped frame 9, and the frame installation cylinders 4 and 4 are operated in reverse 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 rise integrally. 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 squeezing head mechanism 29 each rise. In the middle of the ascent, the mold frame 33 after the molding is lifted 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 bucket 19 are raised by the contraction of the sand-filling bucket lifting cylinder 18. 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. 6 is obtained. FIG. 6 is a longitudinal cross-sectional view of the mold molding machine 100 showing the state in which the mold is released 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 setting cylinder 4 is demolded in the most contracted state. With this, high demolding accuracy can be achieved.

Next, 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 force is applied to the direction in which the frame-shaped frame 9 descends, so that the frame-shaped frame 9 can be reliably lowered to the lowered end. Next, the hydraulic cylinder 14 is extended and the engaging head 13 is raised, 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 and releases it. Crimping the fixed stop 2 of the modeling chassis 3.

Next, the mold frame 33 after molding and molding is carried out via the carry-in/out conveyor 34, and the empty mold frame 33 is carried in. Furthermore, the model changing device 5 is actuated by an actuator (not shown) to exchange the template 8 and the template 8A. FIG. 7 is a longitudinal cross-sectional view of the molding machine 100 showing the state after the template (model holder) is replaced. Repeat the above actions. In addition, as a model replacement The action of setting 5, in a workstation other than the modeling chassis 3 of the turntable 7, can also lift the model holders 6 and 6A by a drive roller elevator (not shown), and then move in and out the model holder in the left and right or front and rear directions 6. 6A and replace template 8, 8A. 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. 8 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 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 not easily compressed further. 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 is installed on the side of the sand filling frame and is replaceable. 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 this, it is possible to maintain the shape of the management and to prevent the abrasion of the nozzle.

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. 9 shows another embodiment of the frame-like frame Enlarged view, and only shows one side of bilateral symmetry. 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. 9, the frame-shaped frame 36 has a removable pad 37 on the inner side thereof. 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. 9, the material of the upper end surface and the 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 the lower surface of the mold frame 33 and the frame-like frame can be improved 36 The sealing of the upper surface, the advantages of preventing the leakage of the mold sand S spray. In addition, there is an advantage that the wear resistance of the outer surface of the template 8 and the sliding surface can be improved by the polyurethane rubber 39 on the inner side of the pad 37 in the pad 37. 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 is particularly difficult because of the high sand filling speed The groove part is clogged, and the filling property of the sand 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 27 is provided in the sand filling frame 27. However, in other embodiments, as shown in FIG. 10, 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. 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 there, so there are effects such as more excellent filling. In addition, there may be one sand filling port.

Furthermore, in the above-mentioned embodiment, an example in which the sand filling nozzle 28 is directly formed in the sand filling frame 27 is shown, but it may not be directly formed in the sand filling frame 27. For example, an opening may be formed on the side of the sand filling frame 27, and a sand filling nozzle 28 may be formed on a member attached to the opening. Fig. 11 is a cross-sectional view of a sand-filling frame 27A according to a modification. As shown in FIG. 11, the sand filling frame 27A of the modified example is formed with openings 27d and 27e at the side portions on both sides thereof. In the openings 27d and 27e, the members 50A and 50B are detachably installed. Sand filling nozzles 28A and 28B are formed on members 50A and 50B, respectively.

When the sand filling nozzles 28A and 28B are worn out, it is only necessary to replace the components 50A and 50B, and it is not necessary to replace the entire sand filling frame. Therefore, this mold molding machine is excellent in maintainability and usability.

The members 50A and 50B can be formed of materials (resin, etc.) with high wear resistance, such as polyurethane, in addition to steel materials such as stainless steel. In this way, the members 50A, 50B can be formed of a material that takes wear resistance into consideration, and the sand-filling frame 27A can be formed of a material suitable for molding. In addition, an exhaust port 27f for low-pressure air may be provided in the sand-filling frame 27A. By this, low-pressure air can be discharged from the exhaust port 27f Gas, so it has better filling effect.

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

S‧‧‧Molding sand

Claims (5)

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 and a side portion that can be connected to the upper opening of the mold frame 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 pass through the squeeze plate and can rise and fall relative to the squeeze plate; a sand-filled hopper, which includes 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 pressing head mechanism and the template; and a sand filling nozzle formed on the sand filling detachably A member of the opening of the side of the frame, and can connect the sand filling port with the molding space; and the lower part of the sand filling bucket is composed of two chute; the sand filling frame is accommodated in the two chute The space inside. The molding machine of claim 1 includes: a frame-shaped frame that forms a part of the molding space, surrounds the outer periphery of the template, and slides up and down; and a gasket is configured to be detachable on the inner side of the frame-shaped frame . According to the casting mold molding machine of claim 2, the material of the upper end surface and the inner side surface of the pad is polyurethane rubber. According to the casting molding machine of claim 3, the heat-resistant temperature of the above-mentioned polyurethane rubber is 70 to 90°C. According to the casting molding machine of claim 3, the heat-resistant temperature of the above-mentioned polyurethane rubber is 110 to 130°C.

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