KR102035205B1 - Centrifugal casting mold for the manufacture of floating seal - Google Patents

Abstract

The present invention is coupled to share the central axis and the mold base in the upper portion of the mold base is transported along each step of the centrifugal casting process and rotated in parallel with the ground, the central region of the upper surface has a height higher than the outer region of the upper surface Is provided in a multi-stage structure, the lower die formed with a groove along the circumference of the upper outer surface of the multi-stage structure; An upper mold having an inner circumferential surface corresponding to the outer shape of the floating seal in the center region of the lower surface thereof and having a casting space opened downwardly, and an injection hole through which an injection hole is in communication with the casting space and injected into the center region of the upper surface; And at least three fixing members disposed on and coupled to the outer surface of the lower surface of the upper mold in predetermined angles with respect to the central axis of the upper mold, and providing elastic pressing force in the direction of the center of the upper mold. do.
According to an embodiment of the present invention, when the upper and lower molds are distorted due to thermal expansion after centrifugal casting, the upper and lower molds may be corrected prior to the centrifugal casting through manipulation of the fixing member, thereby repeating centrifugal casting. It is possible to suppress the occurrence of defects in the casting through the correction at the time, and a plurality of fixing members for correcting before centrifugal casting to fix the upper mold to the lower mold and at the same time fixed by fixing protrusions formed corresponding to each fixing member on the lower mold. As the member is fixedly supported, it prevents the lifting and biasing of the upper mold during rotational operation for centrifugal casting, thereby minimizing the occurrence of defects in the centrifugal casting result. The mold replacement cost according to the deformation of the mold or the specification of the floating seal by the repeated centrifugal casting process To the effect that can be saved.

Description

CENTRIFUGAL CASTING MOLD FOR THE MANUFACTURE OF FLOATING SEAL}

The present invention relates to a centrifugal casting mold for producing a floating seal.

Floating seals are formed in the form of a band-shaped rubber material that supports the shaft of a rotating body in a metal ring, so that the load is efficiently distributed and stable even in a drive element having a high load. It is applied to the caterpillar of.

Floating seals, like common ball bearings, must be manufactured precisely for stable operation, and the double metal ring not only guides the sliding direction of the rubber material, but also needs to be supported evenly while preventing the rubber material from falling off.

As such, in order to cast ring-shaped precision parts such as metal rings of floating seals, a mold corresponding to the inner circumferential shape corresponding to the outer shape of the floating seal is applied to the inside of the mold divided into upper and lower dies and fixed by pins. By injecting molten metal into the inside while rotating the mold, centrifugal casting of the injected molten metal is introduced into the inner circumferential direction by the centrifugal force to have the appearance of a floating seal and solidify in a ring shape.

Due to the superiority of the centrifugal casting, a centrifugal casting apparatus has been published that improves productivity by continuously arranging a plurality of rotatable molds step by step and successively performing each step process.

However, in the centrifugal casting apparatus, since the mold is rotated at a predetermined speed while the hot melt is in direct contact with the inside of the mold, when the continuous centrifugal casting is performed, the mold is fine due to thermal expansion by heat and centrifugal force by rotation. Can be modified.

In particular, since the centrifugal casting apparatus as in the prior art is repeated centrifugal casting is continuously performed to increase the productivity, the frequency of occurrence of the deviation of the mold due to the deformation and rotation of the mold is also high, the mold inside the mold changes, pins, etc. An abnormality occurs in the fixed state due to the deformation of the fixing position between the upper mold and the lower mold coupled by the fixing means of the upper mold, and the coupling or separation between the upper mold and the lower mold is not performed smoothly, or the vibration of the mold during the centrifugal casting and the deviation of the shaft As a result, a defect may occur in the casting result (casting), and when the defect of the casting occurs, the entire mold has to be replaced, thereby causing a high cost of replacing the mold.

Korea Patent Registration 10-0598464 (Registration date 2006. 07. 03) Korea Patent Registration 10-1210630 (Registration date 2012. 12. 04)

The present invention has been made to solve the conventional problems,

The present invention is to provide a mold for centrifugal casting to minimize the occurrence of defects of the casting due to the distortion of the upper and lower molds due to thermal expansion generated in the repeated centrifugal casting process.

In addition, the present invention is to provide a mold for centrifugal casting to prevent the occurrence of shaking of the mold during the centrifugal casting and the deviation of the shaft.

In addition, the present invention is to provide a centrifugal casting mold that can reduce the cost of manufacturing and replacing the mold.

Centrifugal casting mold according to the present invention provided to achieve the above object, is shared along the mold base and the central axis in the upper portion of the mold base is transported along each step of the centrifugal casting process and rotated in parallel with the ground It is coupled, the central region of the upper surface is provided in a multi-stage structure having a height higher than the outer region of the upper surface, the lower die formed along the circumference of the upper outer surface of the multi-stage structure; A casting space having an inner circumferential surface corresponding to the outer shape of the floating seal is formed in the center area of the lower surface thereof, and a casting space formed therein in the center area of the upper surface, the upper die having an injection hole through which the molten metal is injected; And at least three fastening members disposed in and coupled to the outer surface of the lower surface of the upper mold in predetermined angles with respect to the central axis of the upper mold and providing an elastic pressing force in the direction of the center of the upper mold. The at least three fixing members are locked to the locking grooves of the lower mold with the central area of the lower surface formed to be in contact with the upper center of the lower mold, so that the upper mold is fixed to the upper portion of the lower mold. .

Here, the lower mold is a disk-shaped lower plate that is coupled to share the central axis of rotation and the central axis of the mold base in the upper direction of the mold base; And an upper plate provided in a disc shape having a radius smaller than that of the lower plate, and seated and fixed to a central area of the upper surface of the lower plate, and having a locking groove formed along a circumference of the outer plate. The height increases from the area toward the center direction, characterized in that it has a cone-shaped diffusion region having a diameter smaller than the width of the inner peripheral surface of the upper casting casting space.

At this time, the fixing member is coupled to the outer surface of the lower surface of the upper mold, the passage is formed in the center direction of the upper mold therein, the inner diameter of one end of the passage adjacent to the center direction of the upper mold compared to the inner diameter of the other section It is formed small, the other end of the passage body is provided in a block shape with a screw thread formed along the inner peripheral surface; A ball inserted into the passage of the body and having a diameter larger than an inner diameter of one end of the passage and smaller than an inner diameter of another section; An elastic spring located inside the passage of the body and providing an elastic force; And a pressure bolt rotatably coupled to a screw thread formed in the passage of the body to press the elastic spring in one direction of the body passage, wherein the ball has one end pressed by the elastic spring pressed by the pressure bolt. Pressed in one direction of the passage, characterized in that a part of the ball is exposed in the center direction of the upper die.

And, when the bottom center area of the upper die is in contact with the top surface of the upper plate, each of the at least three fixing members are coupled to the outer bottom area of the upper die in a predetermined angle unit with respect to the central axis of the upper die The ball is exposed from the passage of the body by pressing the elastic spring is fixed to the locking groove formed in the upper plate, characterized in that the upper mold is fixed in the vertical direction to the lower mold.

In addition, the fixing member, according to the phase of the pressing bolt for pressing the elastic spring while moving forward or backward in one direction of the passage by rotating forward or reverse along the thread in a state coupled to the passage of the body, The strength of the ball fixed to the locking groove is pressed to the lower plate is characterized in that it is adjusted.

In addition, the lower plate is located on the upper surface of the outer region of the lower plate corresponding to the position of the fixing member coupled to the upper mold, the support protrusions are provided in a pair of block shapes respectively supporting both sides of the body of the fixing member. It characterized by including.

In addition, the engaging groove is formed along the side circumference of the upper plate, characterized in that formed in a concave groove shape having a depth lower than the exposure height of the ball exposed from the body.

According to an embodiment of the present invention,

In the centrifugal casting mold of the present invention, when the upper and lower molds are distorted due to thermal expansion after centrifugal casting, the upper and lower molds can be corrected prior to the centrifugal casting through the operation of the fixing member. Even during casting, there is an effect that can suppress the occurrence of defects of the casting through the correction.

In the mold for centrifugal casting according to the present invention, a plurality of fixing members performing correction before centrifugal casting fix the upper mold to the lower mold and at the same time, the fixing member is fixedly supported by the fixing protrusion formed corresponding to each fixing member on the lower mold. By doing so, in the rotational operation for centrifugal casting, it is possible to prevent lifting and bias of the upper mold, thereby minimizing the occurrence of defects in the centrifugal casting result.

In addition, as the centrifugal casting mold of the present invention is provided in a form in which an area directly contacting the molten metal is separated in the upper mold and the lower mold, the mold according to the deformation of the mold or the specification of the floating seal by the repeated centrifugal casting process. It is effective to reduce the replacement cost.

1 schematically shows a centrifugal casting apparatus to which a mold for centrifugal casting according to an embodiment of the present invention is applied.
Figure 2 shows the upper and lower molds of the centrifugal casting mold according to an embodiment of the present invention, respectively.
3 is a side cross-sectional view of a mold for centrifugal casting according to an embodiment of the present invention.
4 and 5 schematically show a method of correcting a centrifugal casting mold through a centrifugal casting apparatus to which a centrifugal casting mold according to an embodiment of the present invention is applied.

The above objects, features and other advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. For the purposes of this specification, like reference numerals in the drawings denote like parts unless otherwise indicated.

1 schematically shows a centrifugal casting apparatus to which a centrifugal casting mold according to an embodiment of the present invention is applied, and FIG. 2 shows upper and lower molds of a centrifugal casting mold according to an embodiment of the present invention, respectively. 3 is a side cross-sectional view of a mold for centrifugal casting according to an embodiment of the present invention.

1 to 3, the centrifugal casting mold 100 according to an embodiment of the present invention is sequentially transferred along each process line of the centrifugal casting apparatus 10 and the mold base is rotated in parallel with the ground The central axis is shared and seated on the upper portion of the 200, and a high temperature molten metal is injected together with the rotation of the mold base 200, so that the molten metal has a shape corresponding to the floating seal through centrifugal force. Diffused to form the shape of the floating seal and provides a mold for cooling solidification, it may be provided with a lower mold 110, an upper mold 120 and a fixing member 130.

The lower mold 110 is transported along each process of the centrifugal casting process, and the axial rotation is coupled to share the central axis with the mold base 200 at the upper portion of the mold base 200, and the center region of the upper surface is higher than the outer region of the upper surface. It is provided with a multi-stage structure having a locking groove 114a may be formed along the circumference of the upper outer surface of the multi-stage structure, and may include a lower plate 112 and an upper plate 114.

The lower plate 112 may be provided in a disc shape, and may be coupled to share a central axis and a central axis of rotation of the mold base 200 in an upper direction of the mold base 200.

The upper plate 114 is provided in a disk shape having a smaller radius than the lower plate 112, and is seated and fixed in the center area of the upper surface of the lower plate 112, the locking groove 114a can be formed along the periphery of the outer surface have.

Here, the upper surface of the upper plate 114 is increased in height from the outer region toward the center, but the conical diffusion having a diameter smaller than the width formed by the lower open area of the casting space 122a of the upper die 120 to be described later It may have an area 114b.

That is, the lower mold 110 is provided in a form in which the upper plate 114 is seated in the center of the lower plate 112 to be coupled to share the central axis on the upper surface of the mold base 200, respectively, the rotating shaft of the mold base 200 The center is positioned in the shape of a disc, and when the mold base 200 is rotated for centrifugal casting, the shaft can be rotated without biasing, so that the degree of diffusion of the molten metal through the centrifugal force can be kept constant.

In addition, the upper plate 114 may be coupled in a detachable form on the lower plate 112, so that when the centrifugal casting is in contact with the melt and the deformation occurs in the upper plate 114 during repeated centrifugal casting After the deformed upper plate 114 is separated from the lower plate 112, the upper plate 114 to be replaced may be replaced.

In addition, even when the specification of the floating seal is changed, only the upper plate 114 can be partially replaced, thereby minimizing the cost of replacing the mold.

The upper die 120 has a casting space 112a formed in the center of the lower surface having an inner circumferential surface corresponding to the outer shape of the floating seal, and is formed therein, and the center region of the upper surface is in communication with the casting space 112a to inject molten metal. The injection hole 122b may be formed through.

Here, the upper die 120 has a casting space (122a) and is coupled in the form surrounding the inner mold (122) except the inner mold 122, the injection hole 122b is formed and the region formed with the casting space (122a), The outer shape 124 may include a through hole 124a having a diameter larger than that of the injection hole 122b in a region corresponding to the injection hole 122b formed in the 122.

At this time, the material of the inner mold 122 is preferably selected as a material having a lower coefficient of thermal expansion than the material of the floating seal in order to facilitate the ejection of the casting, the inner mold 122 is separated from the outer mold 124 The bottom portion of the outer shape 124 is opened, the inner mold 122 may be separated or combined in the open lower direction.

Therefore, when the lower portion of the upper die 120 is in contact with the upper portion of the lower die 110 on the same central axis line, one area of the inner die 122 is in contact with the upper plate 114, the casting space 112a opened downwards When the molten metal is closed by the upper plate 114 and is injected through the injection hole 122b of the upper mold 120 rotating along the mold base 200, the injected molten metal is formed by the centrifugal force of the upper plate 114. Along the inclined surface of the diffusion region 114b formed on the upper surface, the contact surface is in close contact with the inner circumferential surface direction of the casting space 112a corresponding to the outer shape of the casting object.

At this time, one area of the inner mold 122 is in contact with the upper plate 114 to close the casting space 112a opened downward, the hot melt is formed by the casting space 112a and the upper plate 114 When injected into the space, the lower surface of the inner mold 122 is not in close contact with the inner mold 122 and the upper plate 144 so that the expanded gas or the like due to the temperature change can be discharged to the outside. It means close to the upper surface of the upper plate 114.

On the other hand, the diameter of the upper plate 114 which is provided in a disc shape is provided smaller than the width of the inner mold 122, the corner portion may be provided in a tapered shape (Taper) by a predetermined height.

At this time, the outer edge portion of the lower surface of the inner mold 122 protrudes downward to correspond to the upper edge of the tapered upper plate 114, the lower surface of the inner mold 122 and the upper surface of the upper plate 114 abut When the lower surface edge of the inner mold 122 and the upper surface edge of the upper plate 114, the inner mold 122 and the upper plate 114 may be spaced apart from the predetermined gap as well as having a fine gap.

In addition, the structure of the lower edge of the inner mold 122 and the upper edge of the upper plate 114 is the upper mold 120 and the lower mold 110 before the molten metal is injected into the centrifugal casting mold 100 of the present invention. In order to adjust the position of the upper mold 120 on the lower mold 110 in the initialization process for adjusting the position of the setting ring (S) to provide a space for seating, which is to be described later centrifugal The centrifugal casting process of the centrifugal casting apparatus 10 to which the casting mold 100 is applied will be described in more detail.

As such, the inner mold 122 and the upper plate 114 which are in direct contact with the molten metal in the centrifugal casting process are provided in a replaceable form, so that deformation may be generated by repeated centrifugal casting or replacement may be required according to specifications of the floating seal. Even if the centrifugal casting mold 100 does not need to be replaced entirely, since only the inner mold 122 and the upper plate 114 need to be replaced, the cost required for the mold replacement may be reduced.

On the other hand, the outer mold 124 is the first picker 500 is arranged to separate the upper mold 120 from the lower mold 110 before the centrifugal casting process in the centrifugal casting apparatus 10 performing the centrifugal casting process, the upper mold 120 In order to be gripped, the insertion groove 124b into which the pick-up rod 510 of the first picker 500 is inserted may be formed along the outer circumferential surface, and the fixing member 130 to be described later is formed in the outer region of the lower surface. Based on the center of the 120 may be coupled in a predetermined angle unit.

The fixing member 130 is disposed at least three or more in the outer peripheral area of the lower surface of the upper mold 120, that is, the outer surface of the lower mold of the outer mold 124, at a predetermined angle unit based on the central axis of the upper mold 120. The elastic pressing force may be provided in the center direction of the 120, and may include a body 132, a ball 134, an elastic spring 136, and a pressure bolt 138.

Here, the fixing member 130 is fixed to the locking groove 114a of the upper plate 114, the upper mold 120 can be fixed to the lower mold 110, at this time, the plurality of fixing members 130 It is arranged in the outer peripheral area of the lower surface of 124 by a predetermined angle unit, the minimum fixing member for maintaining the balance for fixing in order to be fixed to the lower mold 110 while the phase of the upper mold 120 is kept constant ( 130 means the number and arrangement thereof, and in the present embodiment, the same distance from the center of the upper mold 120 and the lower mold 110 is formed, and the three fixing members 130 are outer sides of the outer mold 124 in 120 ° units. Is disposed in the area, each fixing member 130 is locked to the locking groove 114a of the upper plate 114, meaning that it can be fixed to the lower mold 110 without biasing the weight balance of the upper mold 120 do.

Body 132 is coupled to the outer surface of the lower surface of the outer shape 124, the passage 132a toward the center of the upper mold 120 is formed therein, the inner diameter of one end of the passage 132a adjacent to the center direction is the other section It is formed smaller than the inner diameter of, and the other end section may be provided in a block shape formed with threads along the inner circumferential surface.

The ball 134 is inserted into the passage 132a of the body 132, and may have a diameter larger than an inner diameter of one end of the passage 132a and smaller than an inner diameter of another section.

Therefore, the ball 134 is caught in one direction of the passage 132a toward the center of the upper die 120, so that a part of the ball 134 is exposed to the outside of the body 132 and is not separated from the passage 132a. Will not.

The elastic spring 136 is located inside the passage 132a of the body 132 and may provide an elastic force.

In more detail, the elastic spring 136 is located inside the passage 132a of the body 132 but is located between the ball 132 and the pressing bolt 138 to be described later, the other end of the passage 132a It is compressed on the passage 132a by the pressure bolt 138 fixed to the ball 134 and the ball 134 that cannot be separated in one direction, and the ball 132 toward the center of the upper die 120 through the elastic force by compression. Pressurized.

In addition, the locking groove 114a formed in the upper plate 114 has a concave groove shape formed along the lateral circumference of the upper plate 114 and having a depth lower than the exposure height of the ball 134 exposed from the body 1320. Can be formed.

Accordingly, a portion of the ball 134 exposed from the body 132 is directed toward the center of the upper die 120 through the elastic force of the elastic spring 136 compressed between the pressure bolt 138 and the ball 134 to be described later. It can be pressurized.

At this time, the inner mold 122 is in contact with the upper plate 114, when the upper mold 120 is located above the lower mold 110, the ball (at least three or more of the fixing member 130 coupled to the outer mold 124 ( 134 is fixed at the position of the locking groove 114a of the upper plate 114, so that the upper mold 120 can be fixed in the vertical direction on the lower mold 110 without being biased in any one direction, the mold base As the upper mold 120 is uniformly fixed even with the rotation of the 200, the lifting of the upper mold 120 is not generated.

The pressing bolt 138 is rotationally coupled to the thread formed on the other end of the passage 132a of the body 132 to press the elastic spring 136 in one direction of the passage 132a.

At this time, the pressing bolt 138 is rotated forward or reverse along the thread, and as the degree of pressing the elastic spring 136 while moving forward or backward on the passage 132a is changed, the ball through the rotation of the pressing bolt 138 The strength of the elastic force transmitted to 134 may be changed.

Therefore, when the upper mold 120 is fixed above the lower mold 110 due to the locking groove 114a formed in the upper plate 114 at least three or more fixing members 130, each pressing By adjusting the amount of rotation of the bolt 138, it is possible to fine-tune the fixed strength of the upper mold 120 fixed to the lower mold 110 and the horizontal fixing position of the upper mold 120.

As such, the configuration of the fixing member 130 and the locking groove 114a included in the upper mold 120 and the lower mold 110, respectively, is fixed to the lower mold 110 for the purpose of the present invention described above 120 In order to enable fine adjustment of the fixed strength and the horizontal fixed position.

In other words, when the inner mold 122 and the upper plate 114 are deformed due to thermal expansion due to direct contact with the hot melt in the centrifugal casting process, when the centrifugal casting is continuously performed, the inner mold 122 and Since the upper plate 114 is slightly misaligned and defects may occur in the casting, the upper mold 120 is lowered while the setting ring S is seated on the upper plate 114 in the initialization process before the molten metal is injected. When fixed to 110, by adjusting the amount of rotation of each pressing bolt 138 by correcting the fixed position of the upper die 120 will be able to prevent the failure of the casting in advance.

In addition, when the lower plate 112 of the lower mold 110 is positioned in a form in which the lower surface of the inner mold 122 and the upper surface of the upper plate 114 are in contact with each other, each fixing member 130 coupled to the outer mold 124. Positioned to correspond to the position of, the fixing member 130 may include a support protrusion 112a in a pair of block shapes respectively supporting both sides of the body 132.

In this case, the support protrusion 112a may have an upper tapered edge or have a predetermined curvature, and a lower edge of the body 132 of the fixing member 130 may also be provided to have a tapered or predetermined curvature. Before the 120 is lowered from the upper portion of the lower mold 110 and locked, the lower portion of the body 132 of the fixing member 130 is in contact with the upper portion of the support protrusion 112a to lower the mold 110 by the fixing member 130. The downward fixing direction of the upper mold 120 to be locked to it can be guided.

Accordingly, the support protrusion 112a is inertial when the mold base 200 is rotated when the upper mold 120 fixed to the lower mold 110 is locked by the fixing member 130 in the locking groove 114a of the lower mold 110. As a result, the rotational speed of the upper mold 120 may be prevented from slipping of the upper mold 120 generated due to the change in the lower mold 110.

Hereinafter, the centrifugal casting mold 100 and the centrifugal casting mold 100 of the present invention through the stepwise operation of the centrifugal casting apparatus 10 to which the centrifugal casting mold 100 is applied according to an embodiment of the present invention. The tolerance minimization method used will be described in more detail.

4 and 5 schematically show a method of correcting a centrifugal casting mold through a centrifugal casting apparatus to which a centrifugal casting mold according to an embodiment of the present invention is applied.

1, 4 and 5, the centrifugal casting apparatus 10 to which the centrifugal casting mold 100 according to the embodiment of the present invention is applied is a mold base 200 on which the centrifugal casting mold 100 is seated. The centrifugal casting process may be performed by transferring the feeder 300 moving along the initialization area A1, the centrifugal casting area A2, and the extraction area A3 where the centrifugal casting process is sequentially performed.

Initially, the initialization area A1 is an area where the molten metal provided from the pouring machine 400 is supplied to the centrifugal casting mold 100 and before the centrifugal casting process is performed. A process of finely adjusting the fixed position of the upper mold 120 fixed to the lower mold 110 is performed.

In the initialization area A1, a first picker 500 for picking up the upper mold 120 to separate the upper mold 120 from the lower mold 110 or to supply the upper mold 120 to the upper portion of the lower mold 110; The second picker 600 may be disposed to seat the setting ring S on the lower mold 110 or to withdraw the setting ring S seated on the lower mold 110 from the lower mold 110.

At this time, the pickup rod 510 of the first picker 500 is moved vertically upward while being inserted into the insertion groove 124b of the outer mold 124 so that the upper mold 120 is separated from the lower mold 110. The second picker 600 supplies the setting ring S to the upper surface direction of the lower mold 110.

Here, the setting ring (S) is provided in a ring shape having a fine thickness, the second picker 600 supplies the setting ring (S) to the lower mold 110, the setting on the tapered edge of the upper plate 114 It is seated so that the inner side of the ring S may be caught.

At this time, the setting ring (S) is seated so as to span the tapered edge of the upper plate 114, and later, when the upper die 120 is coupled to the lower die 110, so as to correspond to the upper edge of the upper plate 114 The lower surface of the inner mold 122 protruding downward may be fixed while being positioned between the inner mold 122 and the upper plate 114 by the outer edge portion.

Thereafter, the first picker 500 may lower the upper mold 120 separated from the lower mold 110 in the upper direction of the lower mold 110 to couple the upper mold 120 to the lower mold 110.

Here, in the centrifugal casting mold 100, thermal expansion occurs in the inner mold 122 and the upper plate 114 by the heat transferred from the molten metal in the centrifugal casting process, thereby fixing the upper mold 120 to the lower mold 110. Even if the contact position of the inner mold 122 and the upper plate 114 may be slightly changed, the change of the contact position is closely related to the failure of the floating seal, the contact of the inner mold 122 and the upper plate 114 You must correct the position.

For this reason, in the centrifugal casting apparatus 10 to which the mold 100 for centrifugal casting of the present invention is applied, the upper edge of the upper surface 114 of the setting ring S is set through the second picker 600 in the initialization region A1. The upper plate 114 and the inner mold 122 are secured by a setting ring S located between the upper plate 114 and the inner mold 122 by being seated on the upper plate 120 and lowering the upper die 120 in the upper direction of the upper plate 114. The spacing can be positioned with a constant.

At this time, the positions of the outer mold 124 and the lower plate 112 may be shifted by the corrected positions of the upper plate 114 and the inner mold 122, so that the positions of the outer mold 124 and the lower plate 112 must be corrected. When the upper mold 120 is fixed to the lower mold 110 after the setting ring S is removed from the upper plate 114 through the second picker 600, the inner mold 122 and the upper plate 114 are fixed. The contact positions of can be matched.

Therefore, as described above, after positioning the setting ring S between the inner mold 122 and the upper plate 114, the inner mold 122 and the upper plate 114 whose contact position is corrected by the setting ring S are corrected. In order to correct the position of the outer shape 124 and the lower plate 112 by the correction position of the), the corrector 700 may be located in the initialization area A1, and the arrangement position of the corrector 700 is not limited thereto. The process order before the molten metal is supplied from the pouring machine 400 may be arranged in the centrifugal casting area A2.

Here, the compensator 700 may rotate the pressing bolts 138 of the fixing members 130 of the centrifugal casting mold 100 in which the setting ring S is inserted thereinto forward or reverse rotation.

At this time, the compensator 700 is connected to the adjusting bolt 710 and the adjusting rod 710 is provided in contact with the pressing bolt 138 and the rotation driving means 720 and the rotating means for rotating the adjusting rod 710 A driving arm 730 for moving the 720, wherein the adjustment rod 710 and the rotation driving means 720 may be provided to correspond to the number and arrangement position of the fixing member 130, but is not limited thereto. The driving of the mold base 200 may be synchronized so that the mold base 200 is rotated according to the driving of the compensator 700 to position the pressure bolt 138 of each fixing member 130 in the compensator 700. In this case, only a single adjustment rod 710 and the rotation driving means 720 can be implemented.

Of course, when the compensator 700 is configured in the form of a single adjustment rod 710 and the rotation driving means 720, the compensator 700 of the mold base 200 to correspond to the position of the fixing member 130 A switch (not shown) for controlling the rotation may be further included, wherein the switch (not shown) is moved between the outer shape 124 and the lower plate 112 to support the support protrusion of the mold base 200 to rotate. When 112a is in contact, the rotation of the mold base 200 is stopped, and the adjusting rod 710 is contacted with the pressure bolt 138 through the driving arm 730 to rotate the process. It can be implemented by a technical method to repeat for each position, but in the following, the adjustment rod 710 and the rotary driving means 720 is limited to the corrector 700 is provided to correspond to the number and arrangement position of the fixing member 130 Explain.

Corrector before the position correction of the outer shape 124 and the lower plate 112 through the compensator 700, the adjusting rod 710 and the rotary driving means 720 is provided to correspond to the number and arrangement position of the fixing member 130 The adjustment rod 710 and the rotation driving means 720 of 700 will be briefly described.

 The adjustment rod 710 is in contact with the pressure bolt 138 to rotate or reverse rotation of the pressure bolt 138 by the rotation of the rotary drive means 720, the rotary drive means 720 is the adjustment rod 710 It may be provided as a torque motor to provide a rotational force in the forward or reverse direction, and to control the rotational force in accordance with the rotational load applied to the adjustment rod 710.

First, the driving arm 730 of the compensator 700 positions each adjustment rod 710 for each position of each fixing member 130 of the centrifugal casting mold 100 on which the setting ring S is seated, When the 710 is brought into contact with the pressure bolt 138, each rotation driving means 720 reversely rotates the initial adjustment rod 710 for a predetermined time, so that the pressure bolt 138 is elastic with each pressure bolt 138. The spring 136 is moved in the opposite direction to the pressing direction.

This is because the position of the outer mold 124 and the lower plate 112 is slightly twisted by the position of the inner mold 122 and the upper plate 114 corrected by the setting ring (S), the locking groove of the upper plate 114 Since pressures applied to the balls 134 of the fixing members 130 caught by the 114a may be different from each other, this is a process for initializing them.

Thereafter, each rotation driving means 720 rotates each adjustment rod 710 forward, and moves each pressure bolt 138 in the direction in which the pressure bolt 138 presses the elastic spring 136, and the pressure bolt ( In the process of rotating the 138, by reducing the rotational force in accordance with a certain level of rotation load applied to the adjustment rod 710 by the elastic spring 136, applied by each ball 134 caught on the upper plate 114 The pressure of each pressing bolt 138 can be adjusted constantly.

In other words, the pressure bolt 138 presses the elastic spring 136, the force that the ball 134 caught in the locking groove 114a pushes the upper plate 114, the upper plate 114 by the action reaction Presses the ball 134, the pressure applied to the pressure bolt 138 by the elastic spring 136, the rotary drive means 720 to rotate the pressure bolt 138 forward through the adjustment rod 710 When the rotational load is generated on the pressure bolt 138 by the elastic spring 136 being compressed, the rotation driving means 720 detects a certain level of rotational load to lower the rotational force and is corrected by the setting ring S. Position the pressure bolt 138 in a state in which pressure applied to the balls 134 of each of the fixing members 130 is equally dispersed as the positions of the inner mold 122 and the upper plate 114. do.

Each rotation driving means 720 stops the rotation of the adjusting rod 710, and when the driving arm 730 separates the position of each of the fixing rods 710 from the centrifugal casting mold 100, The picker 500 separates the upper mold 120 from the lower mold 110, and the second picker 600 pulls out the setting ring S seated over the upper plate 114.

Thereafter, when the first picker 500 supplies the upper mold 120 above the lower mold 110 to fix the upper mold 120 to the lower mold 110, each of the fixing members coupled to the upper mold 120 ( As the setting ring S is positioned between the upper mold 120 and the lower mold 110, 130 makes the setting ring S slightly misaligned on the lower plate 112. Even after taking out, the contact position of the inner mold 122 and the upper plate 114 is matched to the reference position.

In addition, the centrifugal casting mold 100 in which the contact positions of the inner mold 122 and the upper plate 114 coincide is transferred to the centrifugal casting region A2 by the feeder 300, so that the mold base 200 rotates. In the process, the molten metal supplied from the pouring machine 400 has a casting space of the inner mold 122 whose lower direction is closed by the upper plate 114 through the passage hole 124a and the injection hole 122b of the upper mold 120 ( When injected onto 122a), the molten metal flowing into the inner circumferential surface direction of the casting space 122a by the centrifugal force is formed in a shape corresponding to the appearance of the floating seal as the temperature decreases after a predetermined time. On the inner circumferential surface of the solidified to the appearance of the floating seal.

Thereafter, the centrifugal casting mold 100 moved to the take-out area A3 by the feeder 300 has an upper mold 120 formed by a third picker 800 similar to the first picker 500. A blower 900, which is separated from the upper mold 120 and separated from the upper mold 120, is disposed in the casting space 122a of the upper mold 120, and is removed from the upper mold 120. The casting is taken out through.

Therefore, the centrifugal casting mold 100 having the plurality of fixing members 130 and the compensator 700 for changing the fixing strength of each of the fixing members 130 are directly in contact with the molten metal during the centrifugal casting process, resulting in fine thermal expansion. Even if the position between the inner mold 122 and the upper plate 114 is twisted before the centrifugal casting process, and the contact position of the inner mold 122 located on the upper surface of the upper plate 114 is changed every time by thermal expansion, By adjusting the fixing strength of the fixing member 130, it is possible to correct the position of the inner mold 122 on the upper surface of the upper plate 114, the upper mold 120 and the lower mold by thermal expansion generated in direct contact with the heat source It is possible to suppress the occurrence of defects of the casting due to the twist (110).

On the other hand, the centrifugal casting apparatus 10 to which the centrifugal casting mold 100 of the present invention is applied is a single process starting from the initialization region A1 and ending in the centrifugal casting region A2 and the extraction region A3 as described above. Although described as performing only, the end of the extraction area A3 and the beginning of the initialization area A1 can be provided in the form of an automatic casting facility that continuously produces castings, and for centrifugal casting in the centrifugal casting process. In order to maintain the temperature of the mold 200 optimally, a temperature holding means (not shown) for checking the temperature of the centrifugal casting mold 200 and cooling or heating the centrifugal casting mold 200 is provided in at least one region. It can be disposed, the coating means for applying a coating (Coat) to prevent the molten metal from sticking to the inner mold 122 and the upper plate 114 of the centrifugal casting mold 100 before the centrifugal casting region (A2) (Not shown) State may be provided.

As described above, in the centrifugal casting mold of the present invention, when the upper and lower molds are distorted due to thermal expansion after centrifugal casting, the upper and lower molds can be corrected before the centrifugal casting through the operation of the fixing member. Therefore, even during repeated centrifugal casting, there is an effect that can suppress the occurrence of defects of the casting through the correction.

In the mold for centrifugal casting according to the present invention, a plurality of fixing members performing correction before centrifugal casting fix the upper mold to the lower mold and at the same time, the fixing member is fixedly supported by the fixing protrusion formed corresponding to each fixing member on the lower mold. By doing so, in the rotation operation for the centrifugal casting to prevent the lifting and bias of the upper mold, there is an effect that can minimize the occurrence of defects of the centrifugal casting results.

In addition, in the centrifugal casting mold of the present invention, since the area directly contacting the molten metal in the upper mold and the lower mold is provided in a separable form, the mold replacement cost according to the deformation by the repeated centrifugal casting process or the specification of the floating seal is changed. There is an effect to reduce the.

While preferred embodiments of the present invention have been described above, the present invention is not limited to the above specific embodiments. That is, those skilled in the art to which the present invention pertains can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such suitable changes and modifications Equivalents should be considered to be within the scope of the present invention.

10: centrifugal casting device
100: Centrifugal Casting Mold
110: lower mold
112: lower plate
112a: support protrusion
114: upper plate
114a: Hanging groove
114b: diffusion region
120: Pictograph
122: internal type
122a: casting space
122b: injection hole
124: appearance
124a: through hole
124b: Insertion Groove
130: fixing member
132 body
132a: passage
134: ball
136: elastic spring
138: Pressing bolt
200: mold base
300: conveyor
400: pouring machine
500: first picker
510: pickup rod
600: second picker
700: Compensator
710: adjustable rod
720: rotation driving means
730 drive arm
800: third picker
900: ejector
S: setting ring

Claims (7)

It is conveyed along each process of the centrifugal casting process and is coupled to the upper part of the mold base which is axially rotated in parallel with the ground with respect to the center axis, sharing the central axis with the mold base, and the center region of the upper surface is higher than the outer region of the upper surface. Is provided in a multi-stage structure having a lower die formed along the circumference of the upper outer surface of the multi-stage structure; An upper mold having an inner circumferential surface corresponding to the outer shape of the floating seal in the center region of the lower surface thereof and having a casting space opened downwardly, and an injection hole through which an injection hole is in communication with the casting space and injected into the center region of the upper surface; And at least three fixing members disposed on and coupled to the outer surface of the lower surface of the upper mold in predetermined angle units based on the central axis of the upper mold and providing an elastic pressing force toward the center of the upper mold.
The upper mold has the center area of the lower surface where the casting space is formed in contact with the upper surface center area of the lower mold, and the at least three fixing members are locked to the locking groove of the lower mold so that the upper mold is fixed to the upper portion of the lower mold. Characterized in that the
The lower mold has a disk-shaped lower plate which is coupled to share the central axis of rotation and the central axis of the mold base in the upper direction of the mold base and has a disk shape having a smaller radius than the lower plate, and is seated on the upper surface center region of the lower plate. The upper plate is fixed, the upper plate is formed along the circumference of the outer surface; The upper surface of the upper plate is increased in height toward the center direction in the outer region, but smaller than the width of the lower opening area of the upper casting casting space Centrifugal casting mold, characterized in that it has a cone-shaped diffusion region having a diameter.
delete The method of claim 1,
The fixing member,
Is coupled to the outer surface of the lower surface of the upper die, the passage is formed in the center direction of the upper die therein, the inner diameter of one end of the passage adjacent to the center direction of the upper die is formed smaller than the inner diameter of the other section, The other end section has a body provided in a block shape with a screw thread formed along the inner circumferential surface;
A ball inserted into the passage of the body and having a diameter larger than an inner diameter of one end of the passage and smaller than an inner diameter of another section;
An elastic spring located inside the passage of the body and providing an elastic force; And
And a pressure bolt rotatably coupled to a screw thread formed at the other end of the passage to press the elastic spring in one direction of the passage.
The ball is pressed in one direction of the passage by the elastic spring, one end is pressed by the pressing bolt, a part of the ball is a centrifugal casting mold, characterized in that exposed to the center direction of the upper die.
The method of claim 3,
When the lower center area of the upper die is in contact with the upper surface of the upper plate, each ball of at least three fixing members arranged to be coupled to the lower outer edge area of the upper die by a predetermined angle unit based on the central axis of the upper die Centrifugal casting mold, characterized in that the upper mold is fixed in the vertical direction to the lower mold is fixed to the locking groove formed in the upper plate exposed from the passage of the body by the pressing of the elastic spring.
The method of claim 4, wherein
The fastening member, according to the phase of the pressing bolt for pressing the elastic spring while moving forward or backward in one direction of the passage by rotating forward or reverse along the thread in a state coupled to the passage of the body, the locking groove Centrifugal casting mold, characterized in that the strength is fixed to the ball fixed to the pressing the lower plate.
The method of claim 5,
The lower plate is located on the upper surface of the outer region of the lower plate corresponding to the position of the fixing member coupled to the upper mold, the support protrusions are provided in a pair of block shapes respectively supporting both sides of the body of the fixing member; Centrifugal casting mold, characterized in that it comprises.
The method of claim 3,
The locking groove is formed along the side circumference of the upper plate, the centrifugal casting mold, characterized in that it is formed in a concave groove shape having a depth lower than the exposure height of the ball exposed from the body.

Images