TW201728387A - Mold forming machine - Google Patents

Abstract

A mold forming machine that forms molds by using a conveyed casting frame and pattern plate and comprises: a molding flask having an open side section and having a lower opening connectable to an upper opening of the casting frame; a squeeze head mechanism having a squeeze board capable of entering and withdrawing from the molding flask and a plurality of squeeze feet that penetrate the squeeze board and are capable of being raised and lowered relative to the squeeze board; a sand-filling hopper having at least one sand-filling port that fills molding sand into a forming space formed by the casting frame, the molding flask, the squeeze head mechanism, and the pattern plate; and a sand-filling nozzle capable of connecting the sand-filling port and the forming space and being formed by a member detachably attached to the opening in the side section of the molding flask.

Description

Molding machine

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

In the past, a molding machine for molding a mold by filling a mold sand into a mold by aeration and pressing the filled mold sand is known (for example, refer to Patent Document 1).

[Previous Technical Literature] [Patent Literature]

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

However, the mold molding machine described in Patent Document 1 has a portion that is worn according to the period of use or the frequency of use. The area of wear has an effect on the quality of the mold or casting product. In the art, an excellent molding machine for molding molds is desired.

A mold molding machine according to an aspect of the present invention is a mold for molding a mold using a mold frame and a form to be loaded, and includes: a sand filling frame having an opening portion connectable to an opening portion of the mold frame; a side portion of the opening; a pressing head mechanism having a pressing plate that can enter and exit the sand filling frame; and a plurality of pressing feet that pass through the pressing plate and are movable up and down with respect to the pressing plate; The method has at least one sand filling filling the molding sand into 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 in a member detachably attached to an opening of a side portion of the sand filling frame, and the sand filling port is connected to the molding space.

According to the mold molding machine of one aspect of the present invention, even in the case where the sand filling nozzle is worn, only the member in which the sand filling nozzle is formed can be replaced. Therefore, the mold molding machine is excellent in maintainability and usability.

Another aspect of the present invention is to mold a mold using a mold frame and a template to be loaded, and a sand filling frame having an opening portion connectable to an opening portion of the mold frame; a filling frame disposed above the sand filling frame and having an opening portion connectable to the upper portion of the sand filling frame; and a pressing head mechanism having a pressing plate that can enter and exit the filling frame; And a plurality of pressing feet that can pass through the pressing plate and are movable up and down with respect to the pressing plate; the sand filling filling bucket has a mold sand filled with the mold frame, the sand filling frame, the filling frame, and the pressing And a sand filling nozzle formed on the side of the filling frame and capable of communicating the sand filling port with the molding space.

According to another aspect of the present invention, in a mold molding machine, even in the case where the sand filling nozzle is worn, only the filling frame in which the sand filling nozzle is formed can be replaced. Therefore, the mold molding machine is excellent in maintainability and usability.

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

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

In one embodiment, the heat resistance temperature of the urethane rubber may be 70 to 90 °C. Further, in one embodiment, the heat resistance 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‧‧‧Model chassis

4‧‧‧ sand box setting cylinder

4A‧‧‧Piston rod

5‧‧‧Model replacement device

6‧‧‧Model holder

6A‧‧‧Model holder

7‧‧‧ Turntable

8‧‧‧ template

8A‧‧‧ template

9‧‧‧Frame frame

10‧‧‧Marketing

11‧‧‧ Ontology framework

12‧‧‧ snap groove

13‧‧‧Care Head

14‧‧‧Hydraulic cylinder

15‧‧‧lifting cylinder

16‧‧‧ head

17‧‧‧ Lifting support

18‧‧‧Sand filling bucket lift cylinder

19‧‧‧Sand filling bucket

20‧‧‧ sliding gate

21‧‧‧ sand input

22‧‧‧Switching valve

23‧‧‧ gas supply pipe

24‧‧ ‧ chute

25‧‧‧Air ejection chamber

26‧‧‧ sand filling port

27‧‧‧ sand filling frame

27A‧‧‧ sand filling frame

27c‧‧‧ opening

27d‧‧‧ openings

27e‧‧‧ openings

27f‧‧‧Exhaust port

28‧‧‧ sand filling nozzle

28A‧‧‧ sand filling nozzle

28B‧‧‧ sand filling nozzle

29‧‧‧Compression head mechanism

30‧‧‧Squeeze plate

31‧‧‧Pushing feet

32‧‧‧ moving into and out of the rack

33‧‧‧Template

33a‧‧‧Upper opening

34‧‧‧ Moving in and out conveyor belt

35‧‧‧block components

36‧‧‧Frame frame

37‧‧‧ cushion

38‧‧‧Metal components

39‧‧‧Polyurethane rubber

50A‧‧‧ components

50B‧‧‧ components

100‧‧‧Molding machine

BF‧‧ Filling frame

S‧‧‧Molded sand

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

Fig. 2 is a longitudinal sectional view showing a molding machine in a state in which a molding space is formed.

Fig. 3 is a longitudinal sectional view showing a molding machine in which an aeration filling state of a mold sand is performed.

Fig. 4 is a longitudinal sectional view showing a molding machine in which the molding sand is once crushed.

Fig. 5 is a longitudinal sectional view showing a molding machine in a state in which a mold sand is secondarily pressed.

Fig. 6 is a longitudinal sectional view showing a mold molding machine in which the mold of the molding mold is released and the mold sand is replenished.

Fig. 7 is a longitudinal sectional view showing a molding machine in a state in which a template (model holder) is exchanged.

Figure 8 is a longitudinal cross-sectional view showing the sand filling nozzle and the sand filling port on the left side of Figure 2 in an enlarged manner.

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

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

Figure 11 is a cross-sectional view of a sand filling frame of a variation.

Hereinafter, a 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 sectional view showing a molding machine 100 in a state in which 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 mold molding machine 100 includes, for example, a chassis frame 1. A fixed stopper 2 is fixed to the chassis frame 1. On the left and right sides (see FIG. 1) of the modeling chassis 3 including the chassis frame 1 and the fixed stopper portion 2, the flask setting cylinders 4, 4 are vertically provided. Set in the sand box One of the cylinders 4, 4 (left side in Fig. 1) is below the center, and the center portion of the model changing device 5 is rotatably supported in a horizontal plane. The main shaft (rotating shaft) of the model changing device 5 is also used as the flask setting cylinder 4 on the left side in Fig. 1 .

The model changing device 5 is a device that carries in the template 8. The model changing 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, 6A are alternately carried in and out of 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 or the like. A plurality of support units are attached to the mounting portions of the model holders 6, 6A of the turntable 7.

The model holder 6 includes a frame frame 9, a plurality of guide pins 10, a body frame 11, and a biasing mechanism (not shown). The frame frame 9 surrounds the outer periphery of the template 8 and slides up and down. A plurality of guide pins 10 are coupled to the lower portion of the frame frame 9. The main body frame 11 is provided with the guide pin 10 slidably inserted up and down, and the template 8 is placed on the upper surface. The squeezing mechanism is affixed to the frame frame 9 and the body frame 11 at both ends thereof, so that the elastic pressure acts on the direction in which the frame frame 9 is lowered. The biasing mechanism is, for example, a plurality of tension coil springs. The model holder 6A has the same configuration as the model holder 6.

A hydraulic cylinder (cylinder) 14 is disposed at a central portion of the modeling chassis 3. The hydraulic cylinder 14 has an engaging head 13 coupled to the upper end of the piston rod. The engaging head 13 is engaged with the engaging groove 12 formed at the central portion of the lower end of the model holders 6, 6A. Further, on the modeling chassis 3, a plurality of lifting cylinders 15 are disposed below the plurality of guide pins 10. The lift cylinder 15 raises and lowers the frame frame 9 via the guide pin 10. A club head 16 is coupled to the upper end of the piston rod of the lift cylinder 15.

When the upper surface of the frame frame 9 is at the extended end of the lift cylinder 15, it protrudes from the parting surface of the die plate 8 upward (for example, 30 mm) (refer to Fig. 2). When the upper surface of the frame frame 9 is at the contracted end of the lift cylinder 15, it is substantially flush with the split surface of the die plate 8 (see Fig. 1).

A lifting support frame 17 is placed between the upper ends of the piston rods 4A of the cylinders 4 and 4. A plurality of sand filling bucket lifting cylinders 18 are mounted on the lifting support frame 17. The front end of the piston rod of the sand filling bucket lift cylinder 18 is coupled to the sand filling bucket 19.

The sand filling hopper 19 is provided with a sand inlet 21 that is opened and closed by the sliding shutter 20 at the upper end. The sand charging hopper 19 is connected to the air supply pipe 23 through which the low-pressure air (for example, 0.05 to 0.18 MPa) is introduced via the on-off valve 22 at the upper portion thereof. The lower portion of the sand filling hopper 19 is composed of two chutes 24. A plurality of air ejection chambers 25, 25 that communicate with a source of compressed air (not shown) via an on-off valve (not shown) are disposed on the inner surface of the chute 24.

The low-pressure air (for example, 0.05 to 0.18 MPa) is sprayed into the sand filling tank 19 from a plurality of air ejection chambers 25 and 25 to form an aeration method for floating and fluidizing the mold sand S. Further, a sand filling port 26 is provided at the lowermost portion of the chute 24 of the sand filling hopper 19.

A sand filling frame 27 is fixedly disposed on the inner side of the lower portion of the chute 24. The sand filling frame 27 has an opening portion 27c connectable to the upper opening portion 33a of the mold frame 33. A sand filling nozzle 28 is formed at a lower portion (side portion) of the sand filling frame 27. The sand filling nozzle 28 has one end that communicates with the sand filling port 26, and the other end of which is in communication with a molding space to be described later. On the inner side of the sand filling frame 27, a pressing head mechanism 29 is disposed. The pressing head mechanism 29 includes a pressing plate 30 that can be inserted into and out of the sand filling frame 27, and a plurality of pressing feet 31. The plurality of pressing feet 31 are segmented and are mounted through the pressing plate 30 to perform the lifting and lowering control of the pressing plate 30. The upper end of the pressing plate 30 is fixed to the lower end of the lifting support frame 17. The sand filling frame 27 is surrounded so that the outer periphery of the pressing head mechanism 29 can be moved up and down. The crushing head mechanism 29 is surrounded by a sand filling hopper 19. The crushing head mechanism 29 is surrounded by at least two directions from the sand filling hopper 19.

The loading/unloading conveyor belt 34 of the mold frame 33 is suspended from the loading/unloading frame 33 via the loading/unloading frame 32 to a position below the pressing head mechanism 29. The mold frame 33 is carried in and out by loading and unloading the conveyor belt 34.

As described above, the pressing head mechanism 29 is supported by the two flask setting cylinders 4, 4, and is configured such that the pressing head mechanism 29 is lowered to perform the frame setting step and the pressing step.

The operation of the mold molding machine 100 thus constructed will be described. The state of FIG. 1 is in a state in which the mold sand S is put into the sand filling hopper 19, and the empty mold frame 33 is carried into the loading/unloading conveyor belt 34. In addition, the model holders 6, 6A are supported by a support unit (not shown). The inner compression spring (not shown) is placed on the model changing device 5 in a state where the molding chassis 3 is lifted by 5 mm. Fig. 1 shows a state in which the model holder 6 is carried into the center of the modeling chassis 3. There is a gap of about 5 mm between the upper surface of the fixed stopper 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 lower the engaging head 13, whereby the engaging head 13 is engaged with the engaging groove 12 formed at the central portion of the lower end of the mold holder 6. Further, the mold holder 6 is pulled down against the compression spring (not shown), and the lower surface of the mold holder 6 is pressed against the upper surface of the fixed stopper 2 of the modeling chassis 3. Thereafter, the lift cylinder 15 is extended and the frame frame 9 is raised via the guide pin 10. Thereby, the upper surface of the frame frame 9 is protruded from the parting surface of the die plate 8 upward.

Further, in the molding machine which performs the frame setting from the bottom up, the model holder 6 is lifted by the 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 long. On the other hand, in the mold molding machine 100 of the present embodiment, at the beginning of the frame setting step, the mold holder 6 can be pressed against the fixed stopper 2 by the hydraulic cylinder 14, and at the same time The frame setting action ends. Therefore, compared with the previous molding machine which is framed from the bottom up, there is no deceleration step at the beginning of the step, so that the time required for the deceleration step can be omitted and the cycle time can be shortened.

Further, after the slide gate 20 is actuated to close the sand inlet 21, the flask setting cylinders 4, 4 are contracted. Thereby, the mold frame 33 is placed on the upper surface of the frame frame 9 which is placed on the outer periphery of the template 8 and protrudes upward. Further, the sand filling bucket lift cylinder 18 is extended to operate. Thereby, the sand filling hopper 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 with each other. Further, the pressing feet 31 are each operated. Concavities and convexities are formed with respect to the unevenness of the template 8 below, and the state shown in FIG. 2 is obtained. In addition, at this time, the molding space is formed by the template 8 placed on the model holder 6, the frame frame 9, the mold frame 33, the sand filling frame 27, and the pressing head mechanism 29, and the other end of the sand filling nozzle 28 is The modeling space is connected.

Next, sand filling is performed by aeration. Figure 3 shows the aeration filling state of the mold sand A longitudinal section view of the molding machine 100. First, low pressure air is ejected from the plurality of air ejection chambers 25, 25 into the sand filling hopper 19. Thereby, the mold sand S in the sand filling tank 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 mold sand S is filled into the molding space (aeration filling) via the sand filling port 26 and the sand filling nozzle 28 by low pressure air. At the time of aeration filling, the low-pressure air is discharged from a small hole (not shown) of the die plate 8.

Next, the flasks are provided with the cylinders 4, 4 and then contracted. Thereby, the sand filling bucket lifting cylinder 18 is contracted. The flask setting cylinders 4 and 4 lower the lifting support frame 17 and the members (the pressing head mechanism 29, the loading/unloading frame 32, and the loading/unloading conveyor belt 34, etc.) supported thereby. In this manner, 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. 4 is obtained. Fig. 4 is a longitudinal sectional view showing a molding machine 100 in a state in which the molding sand is once crushed. At this time, the shrinking operation of the flask setting cylinder 4 continues until the pressing force is reached by the pressure sensor (not shown) to reach the set pressure of the primary pressing, or the encoder position of the flask 4 is set. Not shown) until it reaches the set position of one press.

Next, the operating fluid of the lift cylinder 15 is switched to the released state. Moreover, the flasks 4, 4 are contracted to operate at a higher pressure than the one press. Thereby, the mold frame 33, the sand filling frame 27, the sand filling hopper 19, and the pressing head mechanism 29 are integrally lowered, and the entire molding sand S is secondarily pressed. Fig. 5 is a longitudinal sectional view showing a molding machine 100 in a state in which the mold sand is secondarily pressed. The frame frame 9 is lowered by the contraction of the lift cylinder 15, and the upper surface of the frame frame 9 and the parting surface of the die plate 8 are substantially the same height. Thus, the strength of the outer peripheral portion of the mold is improved, and a uniform mold strength can be obtained. In addition, when the frame frame 9 reaches the falling end and the pressing force does not reach the set pressure of the secondary pressing, the sand filling bucket lifting cylinder 18 is contracted and the sand tank is further provided with the cylinder 4 4, contraction action, thereby further pressing.

Then, if the pressing force reaches the set pressure of the secondary pressing, the pressing stabilization timer is actuated to maintain the pressing for a certain period of time. At this time, in order to fall to the frame frame 9 without reaching In the case of the end, the sand filling bucket lifting cylinder 18 is extended to move the sand filling frame 27 downward, and the mold frame 33 is pressed until the frame frame 9 reaches the falling end. Thereby, the lower surface of the mold frame 33 and the lower surface of the mold can be set to be substantially flush with each other.

Next, while the lift cylinder 15 is extended, the sand filling frame 27 is pressed against the mold frame 33 via the guide pin 10 and the frame frame 9, and the frame installation cylinders 4 and 4 are reversely actuated to release the mold. At this time, the mold frame 33, the sand filling frame 27, the sand filling hopper 19, and the pressing head mechanism 29 are integrally raised. Thereafter, the mold frame 33 after the molding is molded and taken out by the lift cylinder 15 via the guide pin 10 and the frame frame 9. Further, the sand filling frame 27, the sand filling hopper 19, and the pressing head mechanism 29 are each raised. In the middle of the ascent, the mold frame 33 after the molding is lifted up by the loading/unloading conveyor belt 34, and is completely separated from the die plate 8. At this time, the sand filling frame 27 and the sand filling hopper 19 are raised by the contraction of the sand filling bucket lifting cylinder 18. Then, after the slide gate 20 is reversely actuated to open the sand inlet 21, the mold sand S is replenished into the sand filling hopper 19 to be in the state of FIG. Fig. 6 is a longitudinal sectional view showing a molding machine 100 for demolding the molding mold and replenishing the molding sand. At this time, the molded mold system is demolded together with the mold frame 33 from the stop state. Further, the piston rod 4A of the frame setting cylinder 4 is demolded in the most contracted state. Thereby, a higher demolding accuracy can be achieved.

Next, the lift cylinder 15 is contracted to lower the guide pin 10 and the frame frame 9. At this time, since a plurality of tension coil springs (not shown) apply a spring pressure to the direction in which the frame frame 9 is lowered, the frame frame 9 can be surely lowered to the lower end. Next, the hydraulic cylinder 14 is extended and the engagement head 13 is raised, whereby the compression spring (not shown) in the support unit (not shown) lifts the model holder 6 from the molding chassis 3 by about 5 mm. The crimping of the fixed stop 2 of the modeling chassis 3 is performed.

Next, the mold frame 33 after the molding is molded is carried out through the loading/unloading conveyance belt 34, and the empty mold frame 33 is carried. Further, the model changing device 5 is actuated by an actuator (not shown) to change the template 8 and the template 8A. Fig. 7 is a longitudinal sectional view showing a molding machine 100 in a state in which a template (model holder) is exchanged. Repeat the above actions. In addition, as a model replacement In the operation of 5, in the workstation other than the modeling chassis 3 of the turntable 7, the model holders 6, 6A can be lifted by a driving roller lifter (not shown), and the model holder can be moved in and out in the left and right or front and rear directions. 6, 6A and replace the template 8, 8A. Thereby, the mold can be changed during the molding process, and the mold can be changed in the cycle.

The above-described mold molding machine 100 is formed in the sand filling frame 27 to form a sand filling nozzle 28 that communicates with the molding space, and the mold sand is filled from the side of the molding space. Therefore, the mold molding machine 100 does not need to consider the arrangement of the sand filling nozzles 28, but adopts the layout of the pressing feet 31 determined from the viewpoint of uniform compression as a whole. For example, the pressing feet 31 may be disposed around the mold frame 33 to obtain a more uniform mold strength throughout the entire surface of the pressing plate. Therefore, the mold molding machine 100 can perform an excellent mold molding.

Next, details of the sand filling nozzle 28 and the sand filling port 26 will be described. Fig. 8 is an enlarged view showing the sand filling nozzle 28 and the sand filling port 26 on the left side of Fig. 2 showing the state in which the molding space is formed. Further, the sand filling nozzle 28 and the sand filling port 26 on the right side are bilaterally symmetrical, and description thereof will be omitted.

A sand filling nozzle 28 is formed in the sand filling frame 27. The sand filling nozzle 28 is inclined such that the inlet from the outer side surface 27a of the sand filling frame 27 is inclined toward the outlet formed on the inner side surface 27b. According to this configuration, the mold 8 can be filled with the mold sand S from obliquely above. Therefore, the filled mold sand S is less likely to collide with the pressing foot 31 which forms the unevenness with respect to the unevenness of the template 8, thereby improving the filling property of the mold sand S. In addition, a replaceable sand box spacer can be installed on the inside of the sand filling frame 27. In addition to steel such as stainless steel, the material can be made of a material with high abrasion resistance such as polyurethane. In this way, it is possible to prevent wear of the sand filling frame.

Further, in the sand filling nozzle 28, the inclination angle of the top surface 28a (30 degrees in the present embodiment) is larger than the inclination angle of the bottom surface 28b (15 degrees in the present embodiment). According to this configuration, it is difficult to apply a pressing force from the lateral direction to the mold sand S in the sand filling nozzle 28, so that the mold sand S in the sand filling nozzle 28 is less likely to be further compressed. Furthermore, there is also an advantage that the mold sand S in the sand filling nozzle 28 is difficult to fall further.

Further, 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 can be easily introduced into the sand filling nozzle 28. Further, 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 30 degrees in the present embodiment.

Further, the material of the surface of the bottom surface 26a of the sand filling port 26 is made of ultrahigh molecular weight polyethylene (for example, "Saxin Newlight" manufactured by New Industries Co., Ltd.). According to this configuration, there is an advantage that the mold sand S can be prevented from adhering to the bottom surface 26a and the mold sand S can be prevented from being deposited. Further, in the embodiment, the material of the surface of the bottom surface 26a is made of ultrahigh molecular weight polyethylene, and the block member 35 made of the processed ultrahigh molecular weight polyethylene material is disposed in the most of the chute 24. The composition of the lower part. Further, in the embodiment, the sand filling nozzle 28 is attached to the side of the sand filling frame and is replaceable. In addition to the overall use of steel materials, there are also cases in which a resin such as high-molecular polyethylene having high abrasion resistance is used as a whole. Further, there is a case where a part of the wear resistant material is thermally sprayed on the steel. By these, it is possible to maintain the management of the moldability and to prevent the abrasion of the nozzle.

In the mold molding machine 100 of the embodiment, a sand filling frame 27 is fixed to the inside of the second chute 24. According to this configuration, the sand filling frame 27 is lifted and lowered together with the sand filling bucket 19 by the sand filling bucket lifting cylinder 18, so that the actuator for directly moving the sand filling frame 27 itself is not required. Therefore, there is an advantage that the number of actuators can be reduced.

In the mold molding machine 100 of the embodiment, the mold holder 6 is provided so as to have a frame-like frame 9 that slides up and down around the outer periphery of the die plate 8, but is not limited thereto. For example, the frame frame 9 can also be omitted. However, as shown in the above embodiment, the model holder 6 is provided with the frame frame 9, and is placed on the template 8 of the mold holder 6, the frame frame 9, the mold frame 33, the sand filling frame 27, and the pressing. When the head mechanism 29 forms a molding space, the above-described secondary pressing (squeezing from the side of the mold) can be performed.

Further, the frame frame 9 is not limited to the embodiment described above. Next, another embodiment of the frame frame will be described. Figure 9 is a view showing another embodiment of the frame frame Enlarged view, and only shows one side of the left and right symmetry. Further, the upper surface of the frame-like frame is displayed in a state in which the surface of the template 8 protrudes upward by 30 mm.

As shown in Fig. 9, the frame frame 36 has a detachable pad 37 at its inner side. The gasket 37 surrounds the outer periphery of the template 8 to slide up and down. The gasket 37 is configured to fix the urethane rubber 39 to the metal member 38. Further, as shown in Fig. 9, the material of the upper end surface and the inner side surface of the spacer 37 is made of urethane rubber 39. According to this configuration, when the mold 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 frame can be improved. 36 The sealing property of the upper surface and the prevention of leakage of the molding sand S. Further, there is an advantage that the wear resistance of the outer periphery and the sliding surface of the die plate 8 can be improved in the gasket 37 by the urethane rubber 39 on the inner side surface of the gasket 37. Further, when the spacer 37 having the upper end surface and the inner side surface cannot be attached to the mold holder 6, the spacer of the profile I type can be attached only to the outer periphery of the template 8. Thereby, the wear of the outer periphery of the template 8 can also be prevented.

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

In the mold molding machine 100 of the embodiment, the block member 35 of the processed ultrahigh molecular weight polyethylene material is disposed in the lowermost portion of the chute 24, but the invention is not limited thereto. For example, the air ejection chamber 25 may be disposed instead of the block member 35, and the low-pressure air described above may be ejected from the bottom surface 26a of the sand filling port 26.

Further, in the mold molding machine 100 of the embodiment, since sand is filled by low-pressure air, uniform sand filling can be performed. The sand filling by low-pressure air is more low-pressure (for example, 0.05~0.18MPa) than the sand filling by spraying method (for example, 0.2~0.5MPa), so that the sand can be filled at a low speed, so the model has less wear. .

The sand filling method by spraying method is especially difficult because the sand filling speed is fast. The groove portion is blocked, and the filling property of the sand is lowered. On the other hand, in the mold molding machine 100 of the present embodiment, the filling speed of the sand can be made slower in the initial stage of the low-pressure air by the electro-pneumatic proportional valve, and the filling property can be improved, and the pressure can be shortened from the middle. Filling time. If the pressure is kept low, the filling speed becomes slower, and the filling time of the sand takes time and the cycle time is prolonged. 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 slow at the initial stage and to set the filling to a 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. 10, the sand filling frame 27 may be provided separately from the sand filling frame 27, and the sand filling nozzle 28 may be provided in the filling frame BF which can be separately operated. In this case, the low-pressure air exhaust port (not shown) can be provided in the sand filling frame 27, and the low-pressure air is discharged from the sand filling frame 27, so that the filling is more excellent. Also, the sand filling port can be one.

Further, in the above-described embodiment, the sand filling nozzle 28 is directly formed on the sand filling frame 27, but may not be directly formed in the sand filling frame 27. For example, an opening may be formed in a side portion of the sand filling frame 27, and a sand filling nozzle 28 may be formed in a member attached to the opening. Figure 11 is a cross-sectional view of a sand filling frame 27A of a variation. As shown in Fig. 11, the sand filling frame 27A of the modification is formed with openings 27d and 27e, respectively, on the side portions on both sides thereof. The members 50A, 50B are detachably mounted to the openings 27d, 27e, respectively. Sand filling nozzles 28A, 28B are formed in the members 50A, 50B, respectively.

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

The members 50A and 50B may be formed of a material having high abrasion resistance such as polyurethane (resin or the like) in addition to a steel material such as stainless steel. As such, the members 50A, 50B may be formed of a material that is considered to be wear resistant, and the sand filling frame 27A may be formed of a material suitable for molding. Further, a low pressure air exhaust port 27f may be provided in the sand filling frame 27A. Thereby, the low pressure space can be discharged from the exhaust port 27f. Gas, so there is the effect of filling more excellent.

1‧‧‧Chassis frame

2‧‧‧Fixed stop

3‧‧‧Model chassis

4‧‧‧ sand box setting cylinder

4A‧‧‧Piston rod

5‧‧‧Model replacement device

6‧‧‧Model holder

6A‧‧‧Model holder

7‧‧‧ Turntable

8‧‧‧ template

8A‧‧‧ template

9‧‧‧Frame frame

10‧‧‧Marketing

11‧‧‧ Ontology framework

12‧‧‧ snap groove

13‧‧‧Care Head

14‧‧‧Hydraulic cylinder

15‧‧‧lifting cylinder

16‧‧‧ head

17‧‧‧ Lifting support

18‧‧‧Sand filling bucket lift cylinder

19‧‧‧Sand filling bucket

20‧‧‧ sliding gate

21‧‧‧ sand input

22‧‧‧Switching valve

23‧‧‧ gas supply pipe

24‧‧ ‧ chute

25‧‧‧Air ejection chamber

26‧‧‧ sand filling port

27‧‧‧ sand filling frame

27c‧‧‧ opening

28‧‧‧ sand filling nozzle

29‧‧‧Compression head mechanism

30‧‧‧Squeeze plate

31‧‧‧Pushing feet

32‧‧‧ moving into and out of the rack

33‧‧‧Template

33a‧‧‧Upper opening

34‧‧‧ Moving in and out conveyor belt

100‧‧‧Molding machine

S‧‧‧Molded sand

Claims (6)

A mold molding machine for molding a mold using a mold frame and a template to be loaded, and comprising: a sand filling frame including an opening portion connectable to an opening portion of the mold frame, and a side portion of the opening a pressing head mechanism comprising: a pressing plate that can enter and exit in the sand filling frame; and a plurality of pressing feet that pass through the pressing plate and are movable up and down with respect to the pressing plate; the sand filling tank includes The mold sand is filled into 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 to be detachably mounted on the sand filling a member of the opening of the side of the frame, and the sand filling port may be in communication with the molding space. A mold molding machine for molding a mold using a mold frame and a template to be carried in, and comprising: a sand filling frame including an opening portion connectable to an opening portion of the mold frame; a filling frame, and a configuration thereof Above the sand filling frame, and including an opening portion connectable to the upper portion of the sand filling frame; the pressing head mechanism includes a pressing plate that can enter and exit in the filling frame, and penetrates the pressing portion a plurality of pressing feet which are lifted and lowered relative to the pressing plate; the sand filling filling bucket comprises filling the molding sand to the mold frame, the sand filling frame, the filling frame, the pressing head mechanism and the template At least one sand filling port formed in the molding space; and a sand filling nozzle formed on a side of the filling frame, and the sand filling port is connected to the molding space. A molding machine as claimed in claim 1 or 2, comprising: The frame frame forms part of the molding space, surrounds the outer periphery of the template, and slides up and down; and the spacer is configured to be detachable from the inner side of the frame. The molding machine of claim 3, wherein the material of the upper end surface and the inner side surface of the gasket is urethane rubber. The mold molding machine of claim 4, wherein the urethane rubber has a heat resistance temperature of 70 to 90 °C. The mold molding machine of claim 4, wherein the urethane rubber has a heat resistance temperature of 110 to 130 °C.