JPH09285838A - Device for supplying seal agent for mold and device for applying seal agent for mold using the supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent suction of oil content separated and floated up on the upper part of a tank, at the time of automatically supplying by sucking seal agent for mold in the tank with a pump. SOLUTION: On the tank 9 incorporated with the seal agent S, a pump unit 10 composed of a cover body 22 sealed with a seal rubber 23 and a discharge pump 24, is mounted. A suction hole 25 of the discharge pump 24 opened at the back surface of the cover body 22 is directly opened to the seal agent S through a cylindrical member 26. By this constitution, the suction of the oil content Q and the air A floated on the upper surface of the tank 9 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeder for automatically feeding a high-viscosity liquid sealant applied to a sand mold for casting and a sealant applicator using the feeder, and more particularly to a sealant. A mold that prevents the oil and air separated in the tank from being sucked into the pump side, while allowing the sealant to be applied uniformly to the prescribed sealing area on the mating surfaces of the main molds or the mold and core. The present invention relates to a sealant supply device and a sealant application device using the supply device.

[0002]

2. Description of the Related Art A main mold and a main mold constituting a sand mold for casting,
Alternatively, in order to prevent the molten metal from being inserted into the mating surfaces of the main mold and the core, sealing has been conventionally performed on the mating surfaces. As the sealing technique, it is general to set the clearance (gap) on the mold matching surface to a small value (for example, 0.2 mm or less) so that the molten metal does not enter, but with a method that depends only on the clearance setting, Although it is easy and cost-effective, especially when the precision of the mold itself is low, such as the raw mold, the clearance on the mating surface is small, so the mold matching part hits locally, This is not preferable because it results in frequent defects such as so-called indentation in which a part of the main mold collapses and falls.

For this reason, as another sealing technique for a mold, for example, as disclosed in Japanese Patent Laid-Open No. 4-356326, a concave groove is provided in the outer peripheral portion of the mold, and a gum-like self-shaped groove is formed in the concave groove. A seal which is filled with a hard sealant, or a seal made of a compressible material such as paper or pulp at the mold-matching portion between the core and the sand mold, as shown in JP-A-58-20348. In addition to the one in which a packing is interposed, a method of applying a high-viscosity liquid sealant in a bead-like shape to a mold matching part has been tried in some cases.

As a means for automating the coating operation of the liquid sealing agent as described above, for example, a discharge gun is attached to the tip of an arm of an industrial robot and is moved along a preset coating locus while discharging. A system has been proposed in which a fixed amount of a sealant contained in a tank is supplied to a gun by a pump.

[0005]

A liquid sealing agent used for sealing a sand mold is one in which a refractory material such as calcium carbonate is kneaded with oil to adjust the viscosity, and this type of sealing material contains an emulsifier or the like. Even if added, the oil component is inevitably separated due to a change with time, and the separated oil component floats to the upper part of the tank. When such separated oil is sucked in by the pump and discharged from the discharge gun, the oil is immediately absorbed by the sand mold side, which interrupts the continuity of the bead-shaped sealant. Is not desirable.

For this reason, the suction port of the pump is connected to a position as close as possible to the bottom of the tank so that the pump does not suck the oil that floats above the tank. It is effective to suck the sealant from the lower one among the sealants contained in the tank in order, and to avoid using the oil content in the upper layer portion remaining until the end.

However, in this method, for example, it is necessary to reopen the sealant purchased in a predetermined can in the tank each time, and there is a risk that the oil and air that have already been separated may be entrained at the time of reopening. Therefore, as a result, there is a possibility that the continuity of the sealing agent applied in a bead shape is interrupted as in the above case.

Therefore, instead of the above method, for example, when the can is opened, a pump is directly attached to the top of the can so that the state of the can at the time of purchase can be effectively used as it is as a tank for the sealing agent. It is also possible to pump the sealant from the top.

In this method, although it is possible to prevent reopening of the material and entrainment of air or oil accompanying it, since it is a top suction method, the oil floating on the top of the can is sucked by the pump. However, it is unavoidable that air enters between the pump and the sealant when setting the pump, and there is a possibility that the sealant may be interrupted due to the intake of oil or air. I have also left.

On the other hand, when the above-mentioned canned sealant is replaced, the first fixed amount of the sealant is discharged and discharged to the bead-like sealant for the purpose of air removal and oil removal. Although it is possible to prevent the entrapment of air and oil in the air to some extent, complete air bleeding and oil bleeding are difficult, and not only is time and material wasted a great deal, but it is also necessary to avoid sucking in oil that has separated due to changes over time. Can not.

As described above, in each case, there are advantages and disadvantages, and there are still problems in practical application of automatic supply and application of the liquid sealing agent.

The present invention has been made in view of the above problems, and prevents the occurrence of the interruption of the sealing agent due to the suction of air or oil when automatically supplying the sealing agent in the tank. Accordingly, the present invention aims to provide a sealant supply device and a coating device that can accurately and uniformly apply a bead-shaped sealant to a predetermined seal portion.

[0013]

According to a first aspect of the present invention, a pump unit is arranged above a tank containing a high-viscosity liquid sealant to be applied to a mold, and the sealant in the tank is provided. A supply device for a mold sealant, which is adapted to sequentially suck and discharge the upper part of the above, wherein the pump unit is slidably contacted with an inner peripheral surface of a cylindrical tank having an open upper part. Is arranged in the vicinity of the liquid level level of the sealant, and is composed of a lid body that can move up and down according to the fluctuation of the liquid level, and a discharge pump fixed to the upper surface of this lid body, The suction port of the discharge pump is opened to the inside of the sealant at a position lower than the lower surface of the lid by a predetermined amount.

According to a second aspect of the invention, the suction port of the discharge pump according to the first aspect of the invention is opened to the inside of the sealant through a cylindrical body protruding downward from the lower surface of the lid. It is characterized by being.

According to a third aspect of the present invention, a pump unit is arranged above a tank containing a high-viscosity liquid sealant to be applied to a mold, and the sealant in the tank is selected from the upper part. A mold sealant supply device for sequentially sucking and discharging to the outside, wherein the pump unit is such that the liquid level of the sealant is in sliding contact with the inner peripheral surface of a cylindrical tank having an open top. The lid is arranged in the vicinity of the level position and can move up and down according to the fluctuation of the liquid level, and a discharge pump fixed to the upper surface of the lid, and the peripheral portion of the lid. It is characterized in that a moisture-permeable sealing material is attached to a part of the tank which is in sliding contact with the inner peripheral surface of the tank.

According to a fourth aspect of the present invention, in the portion of the peripheral portion of the lid body that is in sliding contact with the inner peripheral surface of the tank, the third aspect is provided.
A rubber sealing material is provided in place of the moisture-permeable sealing material described in 1 above, and a large number of slits are formed in the lower peripheral edge of the sealing material.

According to a fifth aspect of the present invention, a sealing robot, a discharge gun supported by a tip of a robot arm of the sealing robot, and a sealant supply means for quantitatively supplying a high-viscosity liquid sealant to the discharge gun. The sealing robot is provided with a discharge gun supported at the tip of a robot arm of the sealing robot, and a sealant supply means for quantitatively supplying a high-viscosity liquid sealant to the discharge gun. Is a mold in which the discharge gun is moved along a preset coating locus to apply the sealing agent in a bead shape to the part of the mold that is to be the mating surface of the main molds or the mating surface of the main mold and the core. 5. A sealant applying device for use with a sealant supplying means, wherein the sealant supplying means comprises:
It is characterized by being configured by the supply device described in any one of 1.

Therefore, in the invention described in claims 1 and 2, for example, the sealant purchased in a can can be effectively used as it is as a sealant tank, and the pump unit can be set on the upper part of the tank. For example, the suction port of the pump opens in the sealant at a position lower than the liquid level of the sealant in the tank by a predetermined amount. This prevents the pump from sucking oil and air that are separated and floated on the upper surface in the tank.

According to the third and fourth aspects of the invention, the moisture-permeable sealing material or the sealing material having a large number of slits, which is located at the sliding contact portion between the inner peripheral surface of the tank and the lid, is formed from the lid. Also allows only the oil content to rise upward, the lid body is substantially stationary at the boundary between the oil content that has floated to the upper part of the tank and the sealant below it. It will prevent you from inhaling.

In the invention described in claim 5, the trajectory data to be applied with the sealant is taught in advance, and the robot plays back the sealant while supplying the sealant from the pump unit in a fixed amount. By moving the discharge gun along the application locus during operation, the sealant is applied in a bead-like and uniform manner to the parts of the mold that should be the mating surfaces between the main molds or between the main mold and the core. .

[0021]

According to the invention as set forth in claim 1, the pump unit arranged above the tank of the sealant is arranged in the vicinity of the liquid level position of the sealant in the tank so that It is composed of a lid body that can move up and down according to fluctuations, and a pump that is fixed on the lid body and has an inlet opening inside the sealant at a position lower than the lower surface of the lid body by a predetermined amount. Therefore, despite the top-side suction method, oil and air that are separated and floated above the tank will not be sucked. Accordingly, when the sealing agent is applied to the mold in a bead shape, it is possible to prevent the occurrence of discontinuity of the bead-shaped sealing agent. Particularly, as in the invention described in claim 2, the suction port of the pump is opened to the inside of the sealant through the cylindrical body protruding downward from the lower surface of the lid body, whereby the above effect is further enhanced. It becomes remarkable.

According to the third aspect of the present invention, the moisture-permeable sealing material is attached to a portion of the peripheral portion of the lid body that is in sliding contact with the inner peripheral surface of the tank. It is possible to move only the oil floating on the upper part to above the lid. Therefore, even if the suction port of the pump is directly opened on the lower surface of the lid, it is possible to prevent the pump from sucking the separated oil or air as in the case of the first and second aspects of the invention. You can

According to the invention of claim 4, claim 3
In place of the moisture-permeable sealing material in the invention described in (1) above, by using a rubber-made sealing material having a large number of slits formed on the lower peripheral edge, the above slits allow only oil to move upward in the lid. Therefore, the same effect as the invention described in claim 3 can be obtained also by this.

According to the invention described in claim 5, when the industrial robot is used to apply the sealant to the mold, the sealant is supplied to the discharge gun held by the robot. Since it is configured to be performed by the supply device according to any one of the above, it is of course possible to prevent the breakage of the sealant applied in a bead shape by preventing the suction of oil and air as described above, and to keep it in a fixed position. It is possible to apply the sealant accurately and uniformly, and no excess sealant is squeezed out, and the application quality of the sealant is significantly improved.

[0025]

2 is a diagram showing a typical embodiment of the present invention, showing a schematic plan view of the entire molding line for molding a sand mold for casting a cylinder block of an internal combustion engine. ing.

As shown in FIG. 2, in the lower mold making step S1, the lower mold 2, which is a part of the mold 1 shown in FIG. 3, is molded by a known molding method with its mating surface facing downward, While being transported by a transporting means such as the above, it is turned upside down by a reversing machine in the reversing step S2 of the next step and then carried into the first sealing step S3. The lower mold 2 is a so-called framed type having a metal molding frame 3.

In the above-mentioned first sealing step S3, there is a sealant coating device 4 as shown in FIG. 3, which is combined with the core 5 (see FIGS. 4 and 5) of the lower mold 2 which is set in a later step. A high-viscosity liquid sealant is evenly applied in a bead shape to the area to be the surface.

As shown in FIG. 3, the sealant applicator 4 in the first sealing step S3 includes a joint type sealing robot 6 and a discharge gun (sealing) equipped with a discharge amount control function attached to the tip of the robot arm 7. In addition to the gun 8, a fixed amount supply device 20 for the sealing material S, a robot control panel 11, a pump control panel 12, and the like are further provided. The fixed amount supply device 20 for the sealing material S is a tank in which the sealing agent S is stored. 9 and a pump unit 10 and the like set on the upper surface of the tank 9. And
Since the locus data for applying the sealant S is stored and set in advance in the storage unit of the robot control panel 11 by teaching, the sealing robot 6 is caused to perform the playback operation by the sealing robot 6 being played back. While moving along the trajectory data, for example, 1 to 5 mm at the portion of the lower mold 2 that is to be the mating surface with the core 5.
The sealing agent S is evenly applied in a bead shape according to the thickness.

The above-mentioned liquid sealing agent is a known one whose viscosity is adjusted by kneading a refractory material such as calcium carbonate and an oil component.

The lower mold 2, which has been coated with the sealing agent S in the first sealing step S3, is transferred to the carriage of another conveyor in the transfer step S4, and is then transferred to the core setting step S5.

In the above-mentioned core setting step S5, as shown in FIG. 4, a sand core 5 formed in another core molding step on the lower mold 2 previously coated with the sealant S. Is positioned and fixed. By interposing the sealing agent S on the mating surface between the lower mold 2 and the core 5, the gap between the mating surfaces is filled. Then, the lower mold 2 with the core 5 set therein is conveyed to the second sealing step S6.

In the second sealing step S6, as shown in FIG. 4, there is a sealant applicator 13 which is substantially the same as that in the first sealing step S3.
The sealing robot 6 which constitutes the sealant applying device 13 is a portion which is to be a mating surface with the upper mold 14 of the lower mold 2 combined with the core 5, which is set in a later step,
That is, the high-viscosity liquid sealing agent S is uniformly applied to the core skirting board portion which should be the mating surface of the core 5 and the upper mold 14 and the portion which is the mating surface of the lower mold 2 and the upper mold 14 in a bead shape. Apply to. The lower mold 2 thus coated with the sealant S is conveyed to the mold matching step S7.

On the other hand, in the upper mold making step S11, the upper mold 14 having the casting frame 15 shown in FIG. 5 in parallel with the lower mold making process of the lower mold making step S1 is known in a state in which its mold matching surface faces downward. After being molded by the molding method, it is conveyed to the position closest to the mold matching step S7 by a conveying means such as a conveyor in the same posture and is on standby.

Then, when the lower mold 2 combined with the core 5 as described above is carried into the mold matching step S7, the upper mold 14 is positioned and placed on the lower mold 2 so as to be superposed thereon. To be done. As a result, the sealing agent S previously applied is intervened on the mating surface between the core 5 and the upper mold 14 and the mating surface between the lower mold 2 and the upper mold 14 to fill the gaps between these mating surfaces.

From the above, the lower die 2, the core 5 and the upper die 1
The mold 1 is completed by combining the molds 4 with each other, and the mold 1 is finally transported to a pouring process which is a post process.

FIG. 1 shows the details of a constant quantity supply device 20 forming a part of the sealant coating devices 4 and 13. A horizontal table 21 is provided with a bottomed cylindrical tank 9 having an open top. It is fixedly arranged by a clamper 34, and a high-viscosity liquid sealant S is stored inside the tank 9, and a pump is provided above the tank 9 so as to seal and seal the sealant S. The unit 10 is arranged.

More specifically, the tank 9 is a cylindrical can in which the sealant S is stored when the sealant S is purchased. The tank 9 is effectively used as it is. The disc-shaped lid 22 is set by the method. A seal rubber 23 is integrally fixed to the entire outer peripheral edge of the lid body 22 in advance, and as shown in FIG. 6, the seal rubber 23 is pressed against the inner peripheral surface of the tank 9 so that the tank 9 and the lid body A seal with 22 is made.

A discharge pump 24 to be connected to the discharge gun 8 via a hose 16 is previously fixed to the central portion of the upper surface of the lid 22 as shown in FIGS. The suction port 25 of the discharge pump 24 is the lid 22.
Through, and is opened on the back surface side of the lid body 22. A tubular member 26 projecting downward is integrally provided at the center of the back surface of the lid body 22.
Due to this, the suction port 25 of the discharge pump 24 is substantially extended downward by the length of the tubular member 26 and opens inside the sealant S. As is clear from the above description, the pump unit 10 is formed by the lid 22 and the discharge pump 24 fixed to the upper surface of the lid 22.

A post 27 is erected on the table 21. The post 27 is provided with a lift bracket 28 with a roller 28a which can be moved up and down along the post 27, while the lower part of the post 27 is provided. A winch 29 of a manual winding type is provided in the. The wire 30 led out from the winch 29 is attached to the pulley 3 above the post 27.
1, 32, and the ends thereof are connected to the lift bracket 28, and the lift bracket 2
The above-mentioned pump unit 10 is fixedly supported by 8.

Accordingly, the pump unit 10 can be raised and pulled out of the tank 9 by rotating the handle 33 of the winch 29 to wind the wire 30 if necessary, and is attached to the winch 29. The pull-up state of the pump unit 10 can be self-maintained by the reverse rotation preventing function of the outer ratchet pawl.

In the fixed-quantity supply device 20 for the sealing agent configured as described above, the pump unit 1 is used as described above.
The tank 9 is set at a fixed position on the table 21 in a state where 0 is temporarily pulled up, and then the wire 30 is fed out by the reverse operation of the winch 33 to gradually lower the pump unit 10. Then, while fitting the seal rubber 23 around the lid 22 to the inner peripheral surface of the tank 9, the pump unit 10 is still slowly lowered to bring the lid 22 into contact with the liquid surface in the tank 9.

When the lid 22 of the pump unit 10 comes into contact with the liquid surface, the ratchet pawl for preventing the reverse rotation of the winch 29 is removed so that the pulling force of the winch 29 does not act on the pump unit 10. After that, the pump unit 10 is stopped at the liquid level position only by its own weight.

Thereafter, the discharge pump 24 is activated by an instruction from the pump control panel 12 of FIGS. 3 and 4, and the sealant S is sucked and discharged to the hose 16 side until the internal pressure of the hose 16 reaches a predetermined pressure. Then, prepare for the actual work of applying the sealant thereafter.

Then, as described above with reference to FIGS. 3 and 4, when the actual sealing agent application work is executed by the discharge gun 8 of the sealing robot 6, the discharge pump 24 is also activated. , So that the internal pressure of the hose 16 is always kept at a predetermined pressure, the discharge pump 24 uses the sealant S
Is quantitatively supplied to the hose 16 side.

At this time, oil Q separated in the upper part of the tank 9
Even if the surface of the lid 22 is floating, the cylindrical member 2 on the lower surface of the lid 22
Since 6 directly faces the layer of the sealing agent S below the layer of the oil component Q, the oil component Q is not sucked into the discharge pump 24 side. Further, even if the air A is enclosed between the lid 22 and the liquid surface, the air A will not be sucked into the discharge pump 24 side for the same reason as above.

Then, as described above, the pump unit 10
Is stationary on the liquid surface in the tank 9 only by its own weight, and therefore, when the liquid surface level in the tank 9 is lowered due to the discharge of the sealant S by the discharge pump 24, the pump unit 10 is accordingly Gradually descend due to its own weight.

As described above, according to the present embodiment, when the sealing robot 6 applies the sealing agent while sucking the sealing agent S in the tank 9 by the upper surface suction method, the separated oil Q is separated from the tank 9. Even if the air A is floated above, or the air A is trapped under the lid 22, those oil components Q and air A are discharged from the pump 2
It does not suck into the 4 side. As a result, the continuity of the bead-shaped sealant S applied by the discharge gun 8 can be prevented.

7 and 8 are views showing a second embodiment of the present invention, in which the suction port 25 of the discharge pump 24 has the lid 22.
Although it is the same as that shown in FIG. 1 in that it is directly opened on the back surface of the sheet, it does not have the tubular member 26, and instead of the seal rubber 23 shown in FIG. Is different in that it is provided.

That is, the sealing material 35 made of an oil permeable material (moisture permeable material) such as a non-woven fabric (felt) is integrally provided on the entire outer peripheral edge portion of the lid body 22, and therefore,
When the pump unit 10 is allowed to stand still by its own weight on the liquid surface in the tank 9, the sealing material 35 allows the oil Q in the upper part of the tank 9 to pass therethrough. Only the oil content Q gradually moves, and the lid 22 is finally positioned at the boundary between the oil content Q and the sealant S having a large solid content.

Therefore, according to this embodiment, since the suction port 25 of the discharge pump 24 is directly opened to the layer of the sealant S having a large solid content, the oil Q and air separated from the sealant S are removed. It does not suck into the discharge pump 24 side.

9 to 11 are views showing a third embodiment of the present invention, and as is clear from comparison with FIGS. 7 and 8, a seal rubber 36 is used instead of the moisture permeable seal material 35. 22 is integrally fixed to all the outer peripheral edge portions,
The difference is that a large number of substantially V-shaped slits 37, 37 ... Are formed along the entire circumference of the peripheral edge portion on the lower surface side of the seal rubber 36. These slits 37, 37 ...
Is, for example, 0.2 in both the maximum width dimension and the maximum height dimension.
mm or less.

According to this embodiment, as shown in FIG. 10, the seal rubber 36 is pressed against the inner peripheral surface of the tank 9 while being bent, so that the seal portion makes a line contact along the circumferential direction of the tank 9. While becoming a form close to
The minute spaces of the large number of slits 37, 37 exhibit an oil permeable function by the capillary control element.

That is, the slits 37, 37, ... Of the above-mentioned seal rubber 36 function in the same manner as the oil-permeable seal material 35 of FIGS. Since it is allowed to pass upward, the same effect as that of the second embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a fixed amount supply device for a sealing agent showing a typical embodiment of the present invention.

FIG. 2 is a schematic plan view of an entire molding line of a sand mold for cylinder block casting to which the constant quantity supply device of FIG. 1 is applied.

FIG. 3 is an explanatory view of a first sealing step of FIG.

FIG. 4 is an explanatory view of a second sealing step of FIG.

5 is an explanatory view of the mold matching process of FIG. 2.

FIG. 6 is an enlarged view of part a of FIG.

FIG. 7 is a structural explanatory view of a pump unit showing a second embodiment of the present invention.

FIG. 8 is an enlarged view of part b of FIG.

FIG. 9 is a structural explanatory view of a pump unit showing a third embodiment of the present invention.

FIG. 10 is an enlarged view of portion c of FIG.

11 is a view as seen in the direction of arrow B in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mold 2 ... Lower mold (main mold) 4 ... Sealing agent applicator 5 ... Core 6 ... Sealing robot 7 ... Robot arm 8 ... Discharge gun 9 ... Tank 10 ... Pump unit 13 ... Sealing agent applicator 14 ... Upper mold (Main mold) 22 ... Lid 23 ... Seal rubber 24 ... Discharge pump 25 ... Suction port 26 ... Cylindrical member 35 ... Moisture-permeable sealing material 36 ... Seal rubber 37 ... Slit S ... Liquid sealing agent

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B22C 9/00 B22C 9/00 D B25J 9/22 B25J 9/22 Z

Claims (5)

[Claims] 1. A pump unit is disposed above a tank containing a high-viscosity liquid sealant to be applied to a mold, and the sealant in the tank is sucked in order from the top and discharged to the outside. In the mold sealant supply device, the pump unit is arranged near the liquid level position of the sealant so as to be in sliding contact with the inner peripheral surface of the cylindrical tank having an open upper portion. And a discharge pump fixed to the upper surface of the lid body, and the suction port of the discharge pump is lower than the lower surface of the lid body. A sealant supply device for a mold, which is opened inside the sealant at a lower position by a predetermined amount. 2. The mold seal according to claim 1, wherein the suction port of the discharge pump is open to the inside of the sealant through a cylindrical body protruding downward from the lower surface of the lid. Agent supply device. 3. A pump unit is arranged above a tank containing a high-viscosity liquid sealant to be applied to a mold, and the sealant in the tank is sequentially sucked and discharged to the outside. In the mold sealant supply device, the pump unit is arranged near the liquid level position of the sealant so as to be in sliding contact with the inner peripheral surface of the cylindrical tank having an open upper portion. And a discharge pump fixed to the upper surface of the lid, the inner peripheral surface of the tank being a peripheral portion of the lid. A device for supplying a mold sealant, wherein a moisture-permeable seal material is attached to a portion in sliding contact with the mold. 4. A rubber sealing material is provided in place of the moisture-permeable sealing material according to claim 3 at a portion of the peripheral portion of the lid body that is in sliding contact with the inner peripheral surface of the tank. A sealant supply device for a mold, characterized in that a number of slits are formed in the lower peripheral edge of the sealant. 5. A sealing robot, a discharge gun supported at the tip of a robot arm of the sealing robot, and a sealant supply means for quantitatively supplying a high-viscosity liquid sealant to the discharge gun. The sealing robot moves a discharge gun along a preset application locus to apply a sealant in a bead shape to a portion of a mold that is to be a mating surface between main molds or a mating surface between a main mold and a core. An apparatus for applying a sealing agent for a mold as described above, wherein the sealing agent supply means is constituted by the supplying apparatus according to any one of claims 1 to 4. apparatus.