JP4286930B2 - Mold sand feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold sand supply apparatus for supplying mold sand into a mold such as a casting core manufacturing apparatus.
[0002]
[Prior art]
An outline of the seed sand supply apparatus will be described with reference to FIGS. 1 and 2 showing an embodiment of the present invention. A mold sand supply hopper 1 is provided above the mold sand supply position (i), and a high pressure is provided at the mold sand discharge position (b). An air supply device 2 and a mold 3 such as a casting core manufacturing device are provided above and below, and fluid pressure is applied to a carriage 5 that can reciprocate along a guide rail 4 between a mold sand supply position A and a mold sand discharge position B. A sand tank 7 is suspended through a cylinder 6, and a blow plate 8 is attached to the lower surface side of the sand tank 7. A seal member is mounted on the lower surface side of the blow plate 8.
[0003]
Accordingly, both types of required sand are supplied by opening the open / close gate 1a at the lower part of the sand supply hopper 1 for a predetermined time in the sand tank 7 of the sand supply device at the sand supply position a as shown in the phantom line in FIG. To do. Next, the sand tank 7 is moved to the mold sand discharge position B as shown by the solid line in the figure, and then the sand tank 7 is lowered by the fluid pressure cylinder 6. While being brought into contact with the mold 3 , the blow flange 2a of the high-pressure air supply device 2 is lowered and connected to the opening on the upper surface of the sand tank 7, and the high-pressure air press-fitted into the sand tank 7 from the high-pressure air supply device 2 The mold sand 10 in the tank 7 is supplied from the mold sand outlet on the blow plate 8 side into the mold 3 through the sand inlets 3a, 3b, 3c on the mold 3 side.
[0004]
[Problems to be solved by the invention]
The sand supply device is generally configured as described above, but the sand outlet of the blow plate 8 is provided at a position corresponding to the sand inlet of the die 3 and is used. Since the position of the sand inlet differs depending on the position of the sand supply device, in the conventional sand supply device, the blow plate 8 is not drilled in the blow plate 8 at the production stage of the sand supply device. It was attached to the lower part of the tank 7 and delivered and shipped, and the drilling of the sand outlet according to the sand inlet of the mold used on the user side of the apparatus was entrusted. The hole drilling for was very troublesome. Also, if the mold used changes, the position of the sand outlet changes, so it is necessary to replace the blow plate that matches the mold each time the mold is changed. In addition, there was a problem that the work of replacing the blow plate was very troublesome.
[0005]
In view of the above-mentioned problems, the present invention is a position corresponding to sand inlets of various molds to be used with the blow plate once attached to the lower part of the sand tank. An object of the present invention is to provide a sand supply device capable of easily and easily forming a sand blow-out port required for the above.
[0006]
[Means for Solving the Problems]
In the sand supply device according to the first aspect of the present invention, the sand tank 7 into which the mold sand 10 is supplied is brought into contact with the mold 3 through the blow plate 8 attached to the lower part thereof, and the sand tank 7 In the mold sand supply apparatus in which the mold sand 10 is fed into the mold 3 from the blow plate-side sand outlet through the mold-side sand inlet by high-pressure air, a long hole 13 is formed in the blow plate 8. A seal member 9 made of heat-resistant rubber is disposed on the lower surface side of the main body plate, and the seal member 9 projects integrally with the main body plate-like portion 9a that is in close contact with the lower surface of the blow plate 8 and the upper surface side of the main body plate-like portion 9a. And a sand blowing cylindrical portion 9b that is tightly fitted in the long hole 13 of the blow plate 8, and the inside of the sand blowing cylindrical portion 9b leaves a portion corresponding to the mold side sand inlet. being adapted to the other portions is closed by a closing plug 20, the sand blowing tubular portion the parts corresponding to the sand inlet of the mold 3 in b, characterized in that adapted to a metal blowing nozzle 21 is fitted.
[0007]
A second aspect of the present invention is the sand supply device according to the first aspect, wherein the closing plug 20 is formed of heat-resistant rubber.
[0009]
According to a third aspect of the present invention, in the type sand supply device according to the first or second aspect, the inside of the cylindrical portion for sand blowing 9b is engaged concave stepped portions 14 and 14 on both sides of the opening on the lower surface side of the main plate portion 9a. As a result, the closing plug 20 is projected on both sides of the lower end portion of the plug body 22 and is engaged with the engaging concave steps 14 and 14. The side flange portions 23 and 23 are formed in a cross-sectional inverted T shape corresponding to the internal opening cross-sectional shape of the sand blowing cylindrical portion 9b.
[0010]
Claim 4 is, in the mold sand supply device according to claim 1, wherein the interior of the sand blowing tubular portion 9b, the engaging recessed step portions 14 are formed on both sides of the main plate portion 9a lower surface side opening As a result, the blow nozzle 21 is integrally formed on both sides of the rectangular tube-shaped main body 24 and the lower end portion thereof, and is engaged with the engaging concave stepped portions 14, 14. It consists of the both-side flange parts 25 and 25 which match.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a partially sectional side view showing an outline of a sand supply apparatus according to the present invention, and FIG. 2 is a partially sectional front view thereof. The operation of the entire sand supply apparatus is substantially as described at the beginning. 3 to 5 are partially enlarged views of FIG. 2 and show the detailed structure of the blow plate 8 attached to the lower portion of the sand tank 7 and the seal member 9 disposed on the lower surface side of the blow plate 8. FIG. 7 is a perspective view of the blow plate 8 removed from the sand tank 7 and the seal member 9 attached to the lower surface side of the blow plate 8 as viewed from the upper surface side of the blow plate 8. FIG. 8 shows the blow plate 8 and the seal member. It is the perspective view seen from those in the state which isolate | separated 9 from them. 10A to 10C are a side view, a bottom view, and a cross-sectional view of the seal member 9. The seal member 9 prevents the mold sand 10 from blowing between the blow plate 8 and the mold 3 when the mold sand 10 is supplied from the sand tank 7 into the mold 3 so that the working environment is not deteriorated. Is.
[0012]
As can be seen from these drawings, the blow plate 8 includes a blow plate body 8a formed in a thick plate shape having a rectangular shape in plan view, and a pair of holding rails 11 on both sides in contact with the lower surface of the blow plate body 8a. 11 and the lower plate 8b fixed in close contact with the lower surface of the blow plate main body 8a. The lower plate 8b has both side surfaces formed on the slopes a and a, and the presser rails 11 and 11 fitted into the fitting grooves c and c on the lower surface of the blow plate main body 8a and fixed with the bolts 12 (see FIG. 8). The opposed inner surfaces are formed on the inclined surfaces b, b corresponding to the inclined surfaces a, a of the lower plate 8b. The lower plate 8b has both inclined surfaces a, a that are inclined surfaces b, b of the presser rails 11, 11. It is fixed by being pressed by wedge engagement with. Further, the upper surface of the blow plate main body 8a is brought into contact with the lower surface of the sand tank 7 and is bolted (not shown). Note that the blow plate 8 may be integrally formed with a single plate material without being divided into the blow plate body 8a and the lower plate 8b.
[0013]
As shown in FIGS. 3 to 5 and 8, the blow plate 8 has a long hole 13 extending in the longitudinal direction at the center in the width direction so as to penetrate between the blow plate 8 and the lower plate 8 b. Yes. The seal member 9 is integrally formed of heat-resistant rubber, for example, silicon rubber, and as can be seen from FIGS. 3, 8, and 10, a main body plate-like portion that is in close contact with the lower surface of the lower plate 8b of the blow plate 8. 9a and a sand blowing cylindrical portion 9b that protrudes integrally on the upper surface side of the main body plate-like portion 9a and is tightly fitted in the long hole 13 of the blow plate 8, and this sand blowing cylindrical portion 9b. The inside of the main body plate-shaped portion 9a is formed with engagement concave step portions 14 and 14 on both sides of the lower surface side opening portion, so that the opening is formed in a T-shaped cross section, and the upper end of the sand blowing cylindrical portion 9b. The outer peripheral edge 15 is formed in a slope shape.
[0014]
In order to attach the seal member 9 to the lower surface side of the blow plate 8, the sand blowing cylindrical portion 9b of the seal member 9 is inserted into the long hole 13 from the lower side of the lower plate 8b as shown in FIG. The main body plate-like portion 9a may be brought into contact with the lower surface of the lower plate 8b. The main body plate-like portion 9 a of the seal member 9 comes into close contact with the lower surface of the lower plate 8 b of the blow plate 8 when the sand tank 7 is pressure-bonded to the upper end surface of the mold 3.
[0015]
A recess 16 is formed in the upper surface of the blow plate main body 8 a, and a sand receiving plate (shielding plate) 17 that covers the upper end opening of the long hole 13 is formed in the recess 16. It is provided in a state where it floats at an appropriate height. As shown in FIGS. 3 to 5 and 7, the sand receiving plate 17 is inserted into the four corners of the sand receiving plate 17 and screwed into the bottom surface of the recess 16, and the bolt 18 is externally fitted. The ring-shaped collar 19 is fixed at a certain height from the bottom surface of the recess 16. At this time, a gap of about 1 mm is formed between the lower surface of the sand receiving plate 17 and the upper end of the sand blowing cylindrical portion 9b of the seal member 9 that is tightly fitted in the long hole 13.
[0016]
As shown in FIG.1 and FIG.9, inside the cylindrical part 9b for sand blowing of the seal member 9, the part corresponding to the sand insertion ports 3a, 3b, 3c of the mold 3 is left and other parts are left. A metal blow nozzle 21 is inserted into each of the portions corresponding to the sand inlets 3 a, 3 b, 3 c while being closed by the closing plug 20. Become an exit.
[0017]
As shown in FIG. 9, the closing plug 20 protrudes on both sides of the lower end portion of the plug body 22 and engages with the engaging concave steps 14, 14 of the sand blowing cylindrical portion 9 b. Are formed in a cross-sectional inverted T-shape corresponding to the internal opening cross-sectional shape of the sand blowing cylindrical portion 9b. As shown in FIG. 6A, the closing plug 20 is a mold that uses a long closing plug forming material 20M integrally formed in a T-shaped cross section with heat-resistant rubber, for example, silicon rubber. By cutting with a cutter according to the length of the sand inlet 3, the closing plugs 20 a to 20 c having a required length can be obtained. The closing plug 20 can be formed of a metal material, ceramic, or the like.
[0018]
As shown in FIG. 4, the closing plug 20 is configured such that the plug main body 22 is tightly inserted into the sand blowing cylindrical portion 9 b from below the seal member 9, and both flange portions 23 and 23 are inserted into the sand blowing cylinder. By engaging with the engaging concave steps 14 and 14 of the shape portion 9b, it can be easily attached. At this time, the upper end of the plug body 22 is in close contact with the lower surface of the sand receiving plate 17 as shown in FIG. In this case, since the flange portions 23 and 23 of the closing plug 20 engage with the engaging concave steps 14 and 14 of the sand blowing cylindrical portion 9b, positioning is easy, and the mounting of the closing plug 20 is easy and reliable. Yes.
[0019]
The blow nozzle 21 is formed by press-working and welding a steel plate. As shown in FIG. 6B, the blow nozzle 21 is provided on both sides of the rectangular tubular body 24 and the lower end portion of the rectangular tubular body 24. It comprises a pair of flange portions 25, 25 that are integrally projected and engage with the engaging concave steps 14, 14. FIG. 6B illustrates, for example, three types of blow nozzles 21a to 21c having different lengths. As shown in FIG. 5, the blow nozzle 21 has a rectangular tubular body 24 inserted into the sand blowing cylindrical portion 9b from below the seal member 9, and both flange portions 25, 25 are inserted into the sand blowing cylinder. What is necessary is just to engage with the engagement recessed step parts 14 and 14 of the shape part 9b. At this time, the blow nozzle 21 does not come out when the rectangular tubular body 24 is tightly fitted to the sand blowing tubular portion 9 b of the seal member 9. As can be seen from FIG. 5, the tip of the rectangular tubular body 24 is sufficiently lower than the upper end position of the sand blowing tubular portion 9b.
[0020]
Note that the blow nozzle 21 does not necessarily have to be inserted into the portion corresponding to the sand inlets 3a, 3b, 3c of the mold 3 in the sand blowing cylindrical portion 9b of the seal member 9. However, when the blow nozzle 21 is used, the upper end opening of the sand blowing tubular portion 9b may be deformed so as to narrow the opening by high-pressure air from the sand tank 7 side. Deformation can be prevented.
[0021]
In the sand supply device configured as described above, when the sand supply device is used, the sand injection port 3a, 3b, 3c of the mold 3 is provided inside the sand blowing cylindrical portion 9b of the seal member 9. The closing plug 20 is inserted and closed in the remaining part, leaving the corresponding part, and the part corresponding to the mold side sand inlets 3a, 3b, 3c (closed) in the cylindrical part 9b for sand blowing. A portion that is not blocked by the stopper 20 can be used as a sand outlet of the mold sand 10.
[0022]
In this case, as shown in FIG. 6 (A), the closure plug 20 is made of a long closure plug forming material 20M integrally formed with a heat-resistant rubber such as silicon in an inverted T-shaped cross section. Since it can be formed by cutting to the required length according to the length of the sand inlet of the mold 3, the cost of the closure plug 20 itself is low and the position of the sand inlet can be quickly and easily changed to the mold 3. It can correspond to. Further, the blow nozzle 21 is inserted into the sand outlet, that is, the portion corresponding to the mold side sand inlets 3a, 3b, 3c in the sand outlet cylindrical portion 9b (portion not closed by the closing plug 20). This can prevent deformation of the cylindrical portion 9b for blowing sand.
[0023]
Therefore, once the blow plate 8 and the seal member 9 are attached to the lower part of the sand tank 7, even if the mold 3 for supplying the mold sand 10 is variously changed, there is no need to replace the blow plate 8 and the seal member 9. The extra work is saved and the work is facilitated, and the blow plate 8 and the seal member 9 only need to be provided one by one in the sand supply device, so the equipment cost is very low.
[0024]
【The invention's effect】
According to the first aspect of the present invention, when using the sand supply device, the portion corresponding to the mold side sand inlet in the sand blowing cylindrical portion of the seal member is left and the other portions are closed with a closure plug. As a result, the portion that is not blocked by the closing plug in the sand blowing cylindrical portion becomes the sand blowing outlet of the mold sand. There is no need to perforate the member, and the labor for replacing the blow plate and the seal member can be saved and the cost can be reduced.
[0025]
In addition, once the blow plate and the seal member are attached to the lower part of the sand tank, the blow plate and the seal member are attached to the sand tank even if the mold used is changed and the position of the sand inlet is changed. Since it is only necessary to insert the required number and length of closure plugs into the sand blowing cylindrical part without changing the work, the work is much easier and easier than conventional equipment, and the equipment cost is also conventional. Much cheaper than equipment.
Further, by tightly fitting the sand blowing cylindrical portion of the sealing member into the long hole of the blow plate, the closing plug and the metal blow nozzle inserted into this are oblong holes of the blow plate due to the elasticity of the sealing member. Is held stably by the seal member, and the sand is infiltrated between the closing plug and the metal blow nozzle and the long hole. Nor.
Furthermore, by inserting a metal blow nozzle into a portion corresponding to the sand inlet of the mold in the cylindrical portion for sand blowing, that is, a sand outlet, deformation of the cylindrical portion for sand blowing can be prevented. Can be used in an appropriate state.
[0026]
When the closing plug is formed of heat-resistant rubber as described in claim 2, the closing plug is easy to manufacture and is low in cost, and is prepared in advance in a long body having a required cross section. If this is the case, the cut piece cut according to the length of the mold-side sand inlet can be used as a closing plug, so that a closing plug having a required length can be formed easily and easily.
[0028]
According to a third aspect of the present invention, the closure plug is formed by a plug body and both side flange portions that are provided on both sides of the lower end portion of the plug body and engage with both engaging concave steps of the sand blowing tubular portion. If it is formed in a cross-sectional inverted T shape corresponding to the internal opening cross-sectional shape of the sand blowing cylindrical portion, the flange portion of the closing plug engages with the engaging concave step portion of the sand blowing cylindrical portion. Positioning at the time of plug attachment is easy, and the closure plug can be attached easily and reliably.
[0029]
As described in claim 4, each side to engage the blow nozzle, the angular cylindrical body, on both engagement recessed step of the sand blowing tubular portion is projected integrally with the lower end sides of this By forming with a flange part, positioning at the time of blow nozzle attachment is easy, and attachment of a closing stopper can be performed easily and reliably.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view schematically showing a sand supply device according to the present invention.
FIG. 2 is a partial cross-sectional front view of the sand supply device shown in FIG.
FIG. 3 is a partially enlarged view of the sand supply apparatus shown in FIG. 2;
4 is a partially enlarged view of the sand supply device shown in FIG. 2 and shows a state in which a closing plug is inserted into the sand blowing cylindrical portion of the seal member.
FIG. 5 is a partially enlarged view of the sand supply device shown in FIG. 2 and shows a state in which a blow nozzle is inserted into a sand blowing cylindrical portion of a seal member.
6A is a perspective view showing a long closure plug forming material integrally formed in a T-shaped cross section, and FIG. 6B is a perspective view showing a plurality of blow nozzles.
FIG. 7 is a perspective view of the blow plate and a seal member attached to the lower surface side of the blow plate as viewed from the upper surface side of the blow plate.
FIG. 8 is a perspective view of the blow plate and the seal member as viewed from below in a state where the blow plate and the seal member are separated.
FIG. 9 is a perspective view showing a state where a closing plug and a blow nozzle are about to be inserted into a sand blowing cylindrical portion of a seal member attached to a blow plate.
10A is a side view of a seal member, FIG. 10B is a bottom view thereof, and FIG. 10C is a cross-sectional view thereof.
[Explanation of symbols]
7 Sand tank 8 Blow plate 8a Blow plate main body 8b Lower plate 9 Seal member 9a Main body plate-like portion 9b Sand blow-out tubular portion 10 Long hole 20 Closure plug 21 Blow nozzle 22 Plug body 23 Flange portion 24 Square tubular body 25 Flange Part

Claims (4)

A sand tank supplied with mold sand is brought into contact with the mold through a blow plate attached to the lower part of the sand tank, and the mold sand in this sand tank is injected into the mold side sand from the blow plate side sand outlet by high-pressure air. In the mold sand supply device that supplies the mold through the mouth, a long hole is formed in the blow plate, a heat-resistant rubber seal member is disposed on the lower surface side of the blow plate, A sand blowing cylinder comprising: a main body plate-like portion that is in close contact with the lower surface; and a sand blowing tubular portion that is integrally projected on the upper surface side of the main body plate-like portion and is tightly fitted into a long hole of the blow plate. The inner part of the mold part is configured so that the other part is closed and closed with a stopper, leaving a part corresponding to the mold side sand inlet, and the sand inlet of the mold in the cylindrical part for sand blowing mold sand in the portion corresponding adapted to be inserted blow nozzle made of metal Charging device.   The sand supply device according to claim 1, wherein the closing plug is made of heat-resistant rubber.   The inside of the cylindrical part for sand blowing is formed in an inverted T-shaped cross section by forming engagement concave steps on both sides of the opening on the lower surface side of the main body plate-like part, And a both-side flange portion projecting on both sides of the lower end portion thereof to engage with the both engaging concave step portions, and formed in a cross-sectional inverted T-shape corresponding to the inner opening cross-sectional shape of the sand blowing cylindrical portion. The mold sand supply apparatus according to claim 1 or 2. The inside of the cylindrical portion for sand blowing is formed in an inverted T-shaped cross section by forming engagement concave steps on both sides of the lower surface side opening of the main body plate-like portion, and the blow nozzle is a rectangular tube Jo body and the mold sand supply apparatus according to claim 1 comprising the both side flange portions for engaging the two engaging recessed step are projected integrally with the lower end sides of this.

Images