JPS6034437Y2 - Foundry sand supply device for mold making machine - Google Patents

Description

[Detailed description of the invention] This invention is a molding machine that simultaneously molds upper and lower molds.
The present invention relates to a device for supplying a predetermined amount of foundry sand to a lower casting flask.

The applicant previously installed a pine plate-shaped model plate with a large number of small holes on both the upper and lower sides that communicate with the outside air as a device for simultaneously molding the upper and lower molds, and installed an upper mold plate above the model plate. A casting flask and an upper squeeze board are provided so as to be movable up and down, and a lower casting flask and a lower squeeze board are provided below the model plate so as to be movable up and down. Casting sand is put into the upper and lower flanges while it is placed on the squeeze board, and then the lower molding flask is raised together with the lower squeeze board so that it comes into contact with the lower surface of the model plate, and at the same time the upper squeeze board is lowered to close the upper opening of the upper casting flask, and then compressed air is injected from the upper and lower shoe squeeze boards into the upper and lower flanges to discharge it from the model plate, thereby removing the molding sand from the surface of the model plate. An application has been filed for an invention relating to a mold making machine which, after curing along the curve, further squeezes the mold using upper and lower squeeze boards to create the mold.

However, since this molding machine has just been developed, a molding sand supply device for properly supplying molding sand into the upper and lower flange frames has not yet been developed.

The present invention was made in view of the above circumstances, and its purpose is to provide a molding sand supply device for a mold making machine that appropriately and reliably supplies a predetermined amount of molding sand to the upper and lower casting flasks. do.

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 denotes a rectangular parallelepiped base, and an upwardly facing cylinder 2 fixed to this base has its upper end located near the center of the upper surface of the base 1.

Reference numeral 3 denotes a rectangular lower squeeze board fixed to the upper end of the piston rod 2a of the cylinder 2, which forms a hollow chamber 4 inside and has a large number of small holes 5 penetrating into the hollow chamber 4 on the upper surface.
are drilled as appropriate.

6, 6 is a hollow guide bar that is slidably supported by a guide holder 7.7 fixed to the base 1, the upper end of which is fixed to the lower surface of the lower squeeze board 3, and the hollow chamber 4 is connected to a compressed air source (not shown) through the inside of the guide bar 6.6.

8 is a frame-shaped support member provided around the lower squeeze board 3 via a seal backing 9 so as to be able to slide up and down;
This is raised and lowered by a cylinder (not shown) provided on the lower squeeze board 3.

Reference numeral 10 denotes four guide bars erected at the four corners of the base 1, on which arm members 12 protruding from the four corners of the lower flask 11 are slidably supported. A cylinder (not shown) separately supported by the base 1 allows the position directly above the lower squeeze hoard 3 to be raised and lowered.

The inner surface of the lower flask 11 is formed to expand downward, and the lower opening is set to a size into which the lower squeeze board 3 can be inserted.

Reference numeral 13.13 denotes a support member fixed to the guide bar 10 at a position above the arm member 12, and two guide bars 14.14 extending back and forth are installed in parallel with this at an appropriate interval. , a frame-shaped traveling platform 1 is attached to the guide bar 14.14.
Both end portions of 5 are slidably fitted and supported.

The carriage 15 is moved back and forth by the expansion and contraction of a piston rod 16 of a cylinder (not shown) supported by a frame (not shown) provided separately on the support member 13, and is moved in and out of the lower flask 11 directly above it. It looks like this.

Reference numeral 17 denotes a matte plate type model plate attached to the traveling base 15, which has a hollow chamber 18 formed inside thereof and a large number of small holes 19 and 19 that penetrate into the hollow chamber 18 on each of the upper and lower sides. In addition, an exhaust hole 20 communicating with the hollow chamber 18 is formed on one side.

Reference numeral 21 denotes an upper casting flask whose inner surface is formed into a wide bottom shape and whose lower opening is set to approximately the same size as the upper opening of the lower casting flask 11, and is supported by arm members 22 protruding from the four corners of the upper casting flask. Member 13
It is slidably supported by four guide bars 10 at a higher position.

The upper flask 21 is raised and lowered by a cylinder (not shown) separately supported by the guide bar 10° 10, and when it is lowered to the lowest position, the lower flask 11 which has been raised to the uppermost position It is now possible to match the frame with

A ceiling frame 23 is fixed to the upper end of the guide bar 10, and a rectangular upper squeeze board 25 is fixed to the lower end of the piston rod 24a of the downward cylinder 24 supported by the ceiling frame.

When the upper squeeze board 25 is lowered, the upper flask 21
The size is set so that it can be inserted into the upper opening of the holder, and a hollow chamber 26 is formed inside, and a number of small holes 27 penetrating into the hollow chamber 26 are appropriately bored in the lower surface.

A hollow guide bar 28.28 is slidably supported by a guide holder 29.29 fixed to the ceiling frame 23, and its lower end is fixed to the upper surface of the upper squeeze board 25, and the hollow chamber is fixed to the upper squeeze board 25. 26 is the guide bar 28.2
It is connected to a compressed air source (not shown) through the inside of the air conditioner 8.

Reference numeral 30 denotes a frame-shaped upper presser member provided around the upper squeeze board 25 via a seal backing 31 so as to be able to slide up and down, and this is raised and lowered by a cylinder (not shown) provided on the upper squeeze board 25.

32 and 33 are the lower surface part of the lower flask 11 and the upper pressing member 30
This is a seal backing attached to the lower surface of the

34 is a frame provided adjacent to the base 1 and the ceiling frame 23, and a rectangular cylindrical sand hopper 3 is mounted on the top of this frame.
5 is provided in parallel with the upper squeeze board 25 and the like.

36 is the sand hopper 3 whose upper end is at the bottom of the sand hopper 35.
The upper weighing hopper is provided with an opening so as to be able to communicate with the lower end opening of chute 5, which is connected to chute 3 on the left side wall as shown in FIG.
6a, and a gate member 38 for opening and closing the lower end opening of the sand hopper 35 is integrally provided at the upper end of the right side wall, and is movable back and forth to the left and right via a roller 37 pivotally supported by the frame 34. Supported.

The upper weighing hopper 36 has a storage capacity slightly larger than the molding sand storage capacity of the upper flask 21, and the size of the opening at the lower end is set to be approximately the same size as the opening at the upper end of the upper flask 21.

Reference numeral 39 denotes a horizontal cylinder rotatably supported by the frame 34 via a bracket 40, the tip of a piston rod 39a of which is connected to the lower surface of the gate member 38, and the piston rod 39a of this cylinder is extendable and retractable. As a result, the upper weighing hopper 36 is horizontally moved from side to side to move in and out of a position directly above the upper flask 21.

Reference numeral 41 denotes an upper gate member for opening and closing the lower end opening of the upper weighing hopper 36, and this is used to connect the hooking part 46, which has an inverted cross-section and extends upward from the outside as shown in FIG. It is engaged with a roller 42 that is pivotally supported on the outer surface of the hopper 36, and is supported so as to be able to reciprocate from side to side.

43 is a bracket 4 fixed to the lower surface of the gate member 38
4, and its piston rod 43a is connected to the upper gate member 41.

45 is located under the upper measuring hook 36 and the frame 3
4 is an auxiliary hopper which is open at both upper and lower ends, and is opposed directly below the sand hopper 35.
It has a substantially rectangular cylindrical shape whose upper end opening is sized to communicate with the lower end opening of the upper weighing hopper 36, and a chute 47 for consolidating the foundry sand is provided on the left side surface thereof.

The upper surface level of this auxiliary hopper 45 is the model plate 17.
The upper gate member 41 is set substantially equal to the upper surface level of the upper flask 21 placed thereon, and the upper gate member 41 is configured to move left and right along the upper surface of the auxiliary hopper 45 .

Reference numeral 48 denotes a lower weighing hopper provided at the lower part of the auxiliary hopper 45, which is opened so that its upper end can communicate with the lower end opening of the auxiliary hopper 45, and whose lower end opening has a size equal to that of the lower flask 11.
A roller 4 is set to be approximately the same size as the upper end opening and is pivotally supported by the frame 34 similarly to the upper weighing hopper 36.
A chute 50 is integrally provided on the left side wall and a gate member 51 for opening and closing the lower end opening of the auxiliary hopper 45 is integrally provided on the right side wall.

Reference numeral 52 denotes a lower gate member for opening and closing the lower end opening of the lower weighing hopper 45. This has the same structure as the upper gate member 41, and is supported so as to be able to reciprocate from side to side via a roller pivotally supported by the lower weighing hopper 45. There is.

The molding sand storage capacity of the lower measuring hopper 45 is smaller than that of the lower flask 11 by at least the volume of the lower model part of the model plate 17, and when the lower flask 11 abuts against the model plate 17, the molding sand storage capacity is smaller than that of the lower flask 11. The molding sand in the lower flask 11 is prevented from being pressed by the model part.

Reference numeral 53 denotes a horizontal cylinder that drives the lower weighing hopper 48, which is rotatably supported by a bracket 54 fixed to the frame 34 and whose piston rod 5
The tip of 3a is connected to the gate member 51.

Reference numeral 55 denotes a horizontal cylinder that drives the lower gate member 49. This cylinder is rotatably supported by a bracket 56 fixed to the lower surface of the gate member 51, and the tip of a piston rod 55a is connected to the lower gate member 52. has been done.

57 is a horizontal mold extrusion cylinder attached to the base 1 via a bracket 58, and its piston rod 5
An extrusion plate 59 is fixed to the tip of 7a.

In addition, 60 is the spanning plate of the mold, 61 and 62 are the chutes, and 6
3 is a sand collection box.

Next, the operation of this embodiment configured as above will be explained.

First, assume that each part is in its original position as shown in FIG. 1, and a predetermined amount of molding sand is stored in the sand hopper 35, upper weighing hopper 36, auxiliary hopper 45, and lower weighing hopper 48. The process of simultaneously molding the upper and lower flasks will be explained in order below.

First, the cylinders 39 and 53 are extended, respectively, and the upper weighing hopper 36 and the lower weighing hopper 48 are moved to directly above the upper and lower flasks 21 and 11 together with the upper and lower gate members 41 and 49.

At this time, the upper surface of the molding sand in the upper and lower measuring hoppers 36 and 48 is leveled by the lower ends of the sand hopper 35 and the auxiliary hopper 45, so that a predetermined amount of molding sand is poured into the upper and lower casting flasks 21 and 48.
It is transported to just above 1.

Subsequently, the cylinders 43 and 55 are retracted, the upper and lower gate members 41 and 52 are moved to the right, and the lower openings of each weighing hopper 36, 48 are opened, and each weighing hopper 3
6.48 casting sand is charged into the upper and lower flasks 21, 11 from above (see Fig. 3).

As the upper and lower weighing hoppers 36.48 move to the left, the gate member 38.51 also moves to the left, and the lower openings of the sand hopper 35 and the auxiliary hopper 45 are closed.

Next, cylinder 39.53 is retracted and cylinder 43.
55 are simultaneously extended, and the upper and lower weighing hoppers 36.
48 and the upper and lower gate members 41, 52 are returned to the positions shown in FIG.

At this time, the molding sand on the upper flask 21 is scraped up by the lower end of the upper measuring hopper 36 and collected into the auxiliary hopper 45 via the chute 47.

After this, the cylinder 43 is expanded and contracted to open the upper gate member 41 for a certain period of time, and the molding sand in the sand hopper 35 passes through the upper weighing hopper 36 and is deposited in the lower weighing hopper 48 and the auxiliary hopper 45. Supplied in fixed quantities.

A predetermined amount of molding sand is fed into the sand hopper 35 at a predetermined timing, and the upper gate member 41
The molding sand is also stored in the upper weighing hopper 36 by opening it for a certain period of time and then closing it.

Now, when the contraction operation of the cylinders 39 and 53 described above is completed, the cylinder 2 is extended and the lower squeeze board 3 is raised and placed on the lower presser member 8 whose upper surface level is the same as that of the lower squeeze board 3. The lower flask 11 is the model plate 1.
7 and closes the upper opening of the lower flask 11. At the same time, the cylinder 24 is extended and the upper squeeze board 25 is lowered, and the upper squeeze board 25 is placed on the same upper surface level as the upper squeeze board 25. The presser member 30 is brought into contact with the upper surface of the upper flask 21 via the seal backing 33, and the upper flask 21
The upper opening of is closed (see Figure 4).

Next, when compressed air is supplied into the hollow chambers 4 and 26 through the guide bar 6.28, this air is injected from the small holes 5 and 27 into the lower and upper flasks 11 and 21, and the lower and upper flasks. Passing between the particles of molding sand filled in the frames 11 and 21,
The molding sand particles are discharged to the outside from the exhaust hole 20 through the small holes 19 and 19 of the model plate 17 and the hollow chamber 18, and the molding sand particles are blown onto the upper and lower surfaces of the model plate 17 by the compressed air.
The molding sand is densely and firmly solidified along the surface of the model plate 17.

Subsequently, the cylinders 2 and 24 are further extended, and at the same time a cylinder (not shown) is operated to lower the lower presser member 8 with respect to the lower squeeze board 3, and the upper presser member 30 is lowered with respect to the upper squeeze board 25. so that the lower and upper squeeze boards 3 and 25 are lifted up by the lower and upper flasks 11.
After entering the molding sand 21 and passing compressed air, the molding sand is simultaneously squeezed from both upper and lower surfaces and solidified to a desired hardness.

After the squeeze is completed, the cylinder 24 is compressed and the upper squeeze board 25 is raised, and subsequently the upper flask 21 is raised by the operation of a cylinder (not shown), and the upper mold is removed.

Further, at the same time as the cylinder 24 is retracted, the cylinder 2 is retracted and the lower squeeze board 3 is lowered, and subsequently the lower flask 11 is lowered by the operation of a cylinder (not shown), and the lower mold is removed.

Next, a cylinder (not shown) is compressed, so that
The model plate 17 is attached to the upper and lower flasks 2 via the piston rod 16.
1 and 11, and then the lower flask 11 is raised again to the uppermost position and the upper flask 21 is lowered to align the frames, and then lowered by the extension action of the cylinder 2. The squeeze board 5 is again inserted into the lower flask 11 to support the lower mold.

At the same time as the cylinder 2 is extended, the cylinder 24 is also extended, and the upper squeeze board 25 is again inserted into the upper flask 21 to support the upper mold.
The upper and lower molds are sandwiched and held.

Subsequently, the upper and lower squeeze boards 25 and 5 are lowered by a predetermined distance in synchronization, whereby the upper and lower flasks are extracted from the upper and lower flasks 21.11.

Lower squeeze board 5 on which the cut out upper and lower molds are placed
is then lowered to the lowest position, and the upper and lower molds are pulled out below the upper and lower flasks 21°11.

Note that the lower presser member 8 is returned to its original position while the lower squeeze board 5 is being lowered.

Subsequently, the cylinder 57 is extended, and the frameless upper and lower molds on the lower squeeze board 5 are pushed out to the left in FIG. sent upwards.

After sending out the upper and lower molds, the cylinder 57 is contracted and returned to its original position, and subsequently the lower flask 11, upper squeeze board 25, and upper presser member 30 are all returned to their original positions as shown in FIG. be returned.

Then, the upper flask 21 is once raised to the uppermost position, and at this time the model plate 17 is moved back to just above the lower flask 11, and then the upper flask 21 is lowered and returned to the original position shown in FIG. It will be done.

By repeating the above operations, upper and lower molds without frames are continuously and intermittently molded.

As is clear from the above description, the present invention has an opening below a sand hopper provided adjacent to the upper part of the molding machine body so that its upper end can communicate with the lower end opening of the sand hopper, and opens and closes the lower end opening. An upper weighing hopper having a movable upper gate member is provided so as to be movable above the upper flask, a gate member for opening and closing a lower end opening of the sand hopper is provided on the upper weighing hopper, and a sand hopper is provided below the upper weighing hopper. A lower weighing hopper is provided with an auxiliary hopper facing the auxiliary hopper, and is opened below the auxiliary hopper so that its upper end can communicate with the lower end opening of the auxiliary hopper, and a lower gate member that opens and closes the lower end opening is movably provided. is movable toward the upper part of the lower flask, and the lower weighing hopper is provided with a gate member for opening and closing the lower end opening of the auxiliary hopper. By moving the upper and lower flasks directly above the flasks and then opening the upper and lower gate members, it is possible to measure a predetermined amount of molding sand that has been put into the sand hopper and transport it to above the upper and lower flasks. In addition, it is possible to reliably supply the appropriate amount of molding sand into the upper and lower flange frames, and the molding sand is returned to its original position in the upper and lower weighing hoppers after being supplied into the upper and lower flange frames. The molding sand in the sand hopper can be stored in the sand hopper by simply opening the upper gate member, and it has practical effects such as the entire device being compact and requiring a small installation area, and is a great advantage for this type of industry. There is something big about it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
The figure and FIG. 4 are action explanatory diagrams. In the drawing, 11 is a lower flask, 17 is a model plate, 21 is an upper flask,
35 is a sand hopper, 36 is an upper weighing hopper, 38 is a gate member, 41 is an upper gate member, 45 is an auxiliary hopper, 51
is a gate member, and 52 is a lower gate member.

Claims (1)

[Scope of utility model registration request] A sand hopper is provided on the upper part of the molding machine body adjacent to the molding machine body, and an upper end of the sand hopper is provided below the sand hopper so as to be movable toward the upper part of the upper casting flask installed in the molding machine body. An upper weighing hopper having a storage capacity of a predetermined amount of molding sand, the upper weighing hopper having a movable upper gate member which opens and closes the lower end opening so as to communicate with the lower end opening of the sand hopper and which opens and closes the lower end opening. a gate member that is attached and closes the lower end opening of the sand hopper when the upper weighing hopper is moved toward the upper flask; an auxiliary hopper opened to communicate with the lower end opening of the weighing hopper; and an auxiliary hopper provided below the auxiliary hopper so as to be movable above the lower flask installed in the molding machine body; A lower weighing hopper device having a storage capacity of a predetermined amount of foundry sand, and a lower weighing hopper device having a storage capacity of a predetermined amount of molding sand, and a lower end opening having a movable gate member for opening and closing the lower end opening, and a lower weighing hopper device having a storage capacity of a predetermined amount. A molding sand supply device for a mold making machine, comprising a lower gate member that closes a lower end opening of the auxiliary hopper when the lower measuring hopper is moved toward the lower flask.