JP2001062552A - Cover mounting/dismounting mechanism for centrifugal casting die and, centrifugal casting method with centrifugal casting device having mechanism therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve production efficiency by a casting method which can lighten a cover and, perform cover mounting/dismounting securely and safely with a device of simple structure, mechanically stable and of convenient one. SOLUTION: This centrifugal casting die cover mounting/dismounting mechanism 1 is equipped with locking parts 3 installed at one end opening 2 side, and a centrifugal casting die 9 having a casting die cover 8 wherein a guide shaft, a cover part 5 mounted to the guide shaft, a slide member being installed reciprocatory along an axial direction of the guide shaft 4, a cover mount/ dismount member which is lockable with the locking parts 3 by engaging with the slide member accompanying reciprocation move of the slide member, and released from a caught condition with the stopping part are provided. Furthermore, the mechanism 1 is equipped with the slide member grasping part 10 which can grasp the slide member 6 of the die cover 8 and, a cover mount/ dismount device having a reciprocation means 11 for making the slide member grasping part 10 reciprocatable along an axial direction of the guide shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal casting mold lid attaching / detaching mechanism suitable for a centrifugal casting method frequently used in the production of metal products such as hollow tubes, and a centrifugal casting apparatus having the same. It relates to a centrifugal casting method.

[0002]

2. Description of the Related Art Conventionally, a molten metal (a molten metal) of a ferrous or non-ferrous metal is poured into a mold while the mold is rotated at a high speed, and a centrifugal force is used to cast a casting such as a hollow tube. The centrifugal casting method used is often used. Since the cast product obtained by such a method has a dense structure, high strength and excellent wear resistance, water pipes, gas pipes, and other large pipes are generally manufactured by this method. . Recently, its use has been expanded to, for example, small-diameter mechanical parts.

A centrifugal casting apparatus capable of performing this centrifugal casting method includes, for example, a mold 110 having a detachable lid 111 at one end (right end in FIG. 10) as shown in FIGS. A mold rotating device 120 disposed below the mold 110 and rotating the mold 110 at high speed by rolling the mold 110 on four rollers 121; and a pouring means 130 for pouring molten metal from the other end opening 112 of the mold 110. Is generally used.

When a casting is manufactured using this apparatus 100, a lid 111 is attached to one end of a mold 110 before pouring, and then the mold is rotated by driving the mold rotating device 120. The mold 110 is rotated, and further solidified. After that, the mold rotating device 120 is stopped, the lid 111 is removed from the mold 110, and a series of operations such as taking out a cast product are repeated to manufacture.

Therefore, the simplicity of attaching and detaching the lid is extremely important in terms of production efficiency. The lid structure of the centrifugal casting mold 110 in this apparatus 100 is, as shown in FIG.
0 is fixed at one end to the enlarged diameter portion 11.
5 and a flange 111a contacting the outer surface of the
And a lid 111 having a lid body 111b fixed to the inner surface side of the lid 11a. The lid 111 is attached and detached by manually attaching and detaching fastening means 116 such as bolts.

[0006] A core setter (name of the device) of a centrifugally cast tube mold disclosed in Japanese Utility Model Application Laid-Open No. 2-48250 has been proposed as a mechanization of such manual attachment and detachment of the lid. As shown in FIG. 13, in the core setter of this centrifugal casting tube mold, as shown in FIG. 13, the lid 131 is urged outward (in the direction of the arrow in the drawing) by an elastic spring 132, and one end 133 projects outward by this elastic force. The cover 1 is fitted into an annular groove 141 formed on the inner surface near one end of the casting mold 140.
Locking rod 1 enabling mounting of 31 on centrifugal casting mold 140
As shown in FIG. 14 and the release ring 136 of the lid attaching / detaching device 135 as shown in FIG. 14, the projection 137 is pressed and rotated, and the locking rod 134 is moved inward by the second projection 138 (in the direction of the arrow in the figure). And a pressing lever 139 which pushes back the lid 131 so that the lid 131 can be detached from the centrifugal casting mold 140. The elastic spring 132, the locking rod 134, the pressing lever 139, and the release ring 136 allow the lid to be attached or detached. It is realized by synergy.

[0007]

However, in the former general centrifugal casting apparatus 100, the lid attaching / detaching mechanism is
Since the lid 111 has the flange 111a, it is extremely heavy,
In addition, because of the high temperature, the attachment and detachment was dangerous, and the manual operation was extremely burdensome. In addition, since attaching and detaching with a plurality of bolts requires labor and time, the manufacturing efficiency is significantly reduced. Further, if the bolts are not securely tightened, there is a possibility that the molten metal may leak or the mold lid may come off with high-speed rotation.

Further, in the latter attachment / detachment mechanism of the core setter 130 of the centrifugal casting tube mold, the attachment state of the lid (FIG. 13)
State) is carried only by the elastic force of the elastic spring 132 that urges the locking rod 134 outward, and when this elastic force is attenuated, the locking rod is released even when the pressing by the holding lever 139 is released. There is a possibility that the cover 131 will not be attached because the projection 134 does not protrude outward, and if the cover 131 is rotated at a high speed in this state, the cover 131 is detached, which is extremely dangerous and has a mechanical problem in terms of safety. I have.

This problem is caused by a locking member (locking rod 13) for attaching and detaching the lid 131 to and from the centrifugal casting mold 140.
The operation 4) is attributable to the fact that the operation is realized by an indirect mechanism transmitted through a plurality of components (the elastic spring 132 and the presser lever 139). It has become something.

Further, the reciprocating movement of the lid attaching / detaching device 135 in the horizontal direction itself (specifically, the release ring 136 intruding or retracting above the holding lever 139) is moved by the centrifugal casting mold 14
0 is directly involved in the attachment and detachment of the lid 131, the positioning of the lid attachment / detachment device 135 is strictly required, which has operational difficulties.
Since the lid 131 is detached by the engaging force between the holding lever 36 and the holding lever 139, the lid 131 may not fall off or may fall off the lid attaching / detaching device 135 halfway even if it comes off. Having.

Therefore, an object of the present invention is to make the lid lighter, to attach and detach the lid reliably and safely with a simple structure and mechanically stable,
An object of the present invention is to provide a centrifugal casting mold lid attaching / detaching mechanism that can be simplified and significantly improve production efficiency, and a centrifugal casting method using a centrifugal casting apparatus provided with the same.

[0012]

Means for solving the above problems are as follows: an engaging portion provided at one end opening side; a guide shaft; a lid provided at a distal end side of the guide shaft; A slide member reciprocally movable relative to the guide shaft along the axial direction of the guide member, and engaging with the slide member with the reciprocation of the slide member to be locked by the locking portion. A mold for centrifugal casting, comprising a mold lid having a lid attaching / detaching member capable of releasing the locking state with the locking portion, and the sliding member of the mold lid being capable of being gripped. A centrifugal casting mold, comprising: a slide member gripping portion; and a lid attaching / detaching device having a reciprocating means for reciprocating the slide member gripping portion along the axial direction of the guide shaft. Lid attachment / detachment mechanism

[0013] The lid attaching / detaching member can be locked to the locking portion as the slide member moves toward the distal end,
It is preferable that the engagement with the engagement portion can be released with the movement of the slide member toward the rear end. The mold lid has a lid attaching / detaching member attaching portion provided integrally with the guide shaft, and the lid attaching / detaching member is rotatably attached to the lid attaching / detaching member attaching portion while being pivotally supported by the lid attaching / detaching member attaching portion. Is preferred. It is preferable that at least two or more of the lid attaching / detaching members are provided outside the slide member. The lid attachment / detachment member has a first engagement portion that engages with the slide member as the slide member moves toward the distal end, and is locked to the engagement portion by engagement of the two. It is preferred that It is preferable that the slide member has a tapered portion that becomes thinner toward the distal end, and the taper portion presses the first engagement portion of the lid attaching / detaching member. It is preferable that the lid attaching / detaching member has a locked portion locked by the locking portion. The slide member,
A second engaging portion that engages with the lid attaching / detaching member as the sliding member moves toward the rear end side, and the engagement with the engaging portion releases the engagement state with the engaging portion. It is preferred that It is preferable that the slide member is urged toward a distal end side of the guide shaft by a first elastic member provided between the guide shaft and the slide member. It is preferable that the slide member has a concave portion on an outer surface near a rear portion for engaging with the slide member grip portion of the lid attaching / detaching device. It is preferable that the lid attaching / detaching device has a pressing unit for pressing a rear portion of the guide shaft. The pressing means,
It is preferable to have a shaft portion provided so as to be able to enter and exit from the front end side of the main body portion, and a pressing portion provided at the front end side of the shaft portion. It is preferable that the pressing means has an elastic member (second elastic member) provided between the pressing portion and the main body to bias the pressing portion toward the distal end. It is preferable that the second elastic member has a stronger elastic force than the first elastic member.

In order to solve the above-mentioned problems, a locking portion provided at one end opening side, a guide shaft, a lid provided at a tip end side of the guide shaft, and an axial direction of the guide shaft are provided. A slide member attached to the guide shaft so as to be reciprocally movable relative to the guide shaft, and engaged with the slide member with the reciprocation of the slide member to be locked by the locking portion; A centrifugal casting mold including a mold lid having a lid attaching / detaching member in which a locked state with the locking portion is released, and a slide member gripper capable of gripping the slide member of the mold lid, A lid attachment / detachment device having reciprocating means for reciprocating the slide member gripping portion along the axial direction of the guide shaft, a pouring means for pouring molten metal into the centrifugal casting mold, High speed centrifugal casting mold A centrifugal casting method including a mold rotating device for causing the mold to rotate, wherein the centrifugal casting method includes a first step of attaching the mold lid to one end opening of the centrifugal casting mold; A second step of pouring into the centrifugal casting mold by hot water means, a third step of rotating the centrifugal casting mold at a high speed by the mold rotating device, and after solidifying the molten metal, stopping the mold rotating device and stopping the casting mold. A fourth step of removing the lid from the centrifugal casting mold, and a fifth step of taking out a casting from the centrifugal casting mold, wherein the first step comprises: In the gripped state, the slide member gripping portion is advanced by the reciprocating means to be inserted into one end opening of the centrifugal casting mold, and the slide member is moved to lock the lid attaching / detaching member. To the part And a step of releasing the gripping state of the slide member by the slide member gripper and retreating the slide member gripper by the reciprocating means, wherein the fourth step is performed by the reciprocating means. Advancing a slide member gripping portion to grip the slide member; moving the slide member to release a locked state between the lid attaching / detaching member and the locking portion; and Retreating the member holding portion together with the mold lid.

The lid attaching / detaching member can be locked to the locking portion as the slide member moves toward the distal end,
It is configured such that the locked state with the locking portion can be released with the movement of the slide member to the rear end side,
In the first step, in a state where the mold lid is gripped by the slide member gripper, and the slide member is positioned at a rear end side of the guide shaft, the slide member gripper is moved by the reciprocating means. Moving the slide member toward the distal end side of the guide shaft to lock the lid attaching / detaching member with the locking portion; Releasing the gripping state of the slide member by the member gripper, and retreating the slide member gripper by the reciprocating means, wherein the fourth step is to move the slide member gripper by the reciprocating means. Moving the slide member to the rear end side of the guide shaft to move the slide member to the rear end side of the guide shaft and locking the lid attaching / detaching member with the locking portion; A step of releasing, it is preferable to have a step of retracting the slide member gripping portion together with the mold lid by said reciprocating means.

As described above, in the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention, the lid can be attached / detached by engaging or disengaging the engaging portion provided at one end opening of the centrifugal casting mold with the lid attaching / detaching member. Since the mold release is performed, it is not necessary to provide a flange portion larger than one end opening of the centrifugal casting mold in the mold lid, and the weight of the mold lid is reduced. In addition, the attachment / detachment of the lid is mechanized, and the mounting state is supported by the direct engagement between the slide member and the member for attaching / detaching the lid, so that the lid is securely attached and the number of parts is small and mechanically stable It will be. Furthermore, since the lid itself has a slide member for operating the lid attaching / detaching member, the lid attaching / detaching device only has to have a function of gripping the sliding member and reciprocating the sliding member, and the operation becomes easier. If such a mechanism for attaching and detaching the lid of the centrifugal casting mold is used, a cast product can be manufactured reliably, safely and easily, and the production efficiency is remarkably improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lid attaching / detaching mechanism 1 for a centrifugal casting mold according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a partial vertical cross-sectional view of one embodiment of a centrifugal casting mold lid attaching / detaching mechanism according to the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the centrifugal casting mold lid structure near the lid structure in FIG. 3
FIG. 4 is a cross-sectional view taken along the line AA of FIG. 2, FIG. 4 is a partially cutaway side view of an embodiment of the lid attaching / detaching device in the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention, and FIG. FIG. 7 is an enlarged sectional view taken along line BB of FIG.

The lid attaching / detaching mechanism 1 of the centrifugal casting mold of this embodiment includes a locking portion 3 provided at one end opening 2 side, a guide shaft 4, and a lid portion 5 provided at the tip end side of the guide shaft 4. And a slide member 6 attached to the guide shaft 4 so as to be able to reciprocate relative to the guide shaft 4 along the axial direction of the guide shaft 4, and engage with the slide member 6 as the slide member 6 moves to the distal end side. As the slide member 6 moves to the rear end side, the locking portion 3 can be locked.
A centrifugal casting mold 9 having a mold lid 8 having a lid attaching / detaching member 7 capable of releasing a locking state with the mold member, and a slide member gripper 1 capable of gripping the slide member 6 of the mold lid 8.
0, and a lid attaching / detaching device 12 having a reciprocating means 11 for reciprocating the slide member gripping portion 10 along the guide shaft 4 in the axial direction. A centrifugal casting mold 9 having a lid 8 and a lid attaching / detaching device 12 have a characteristic configuration. Hereinafter, each configuration will be sequentially described.

The centrifugal casting mold 9 is, as shown in FIG.
The molten metal is poured by the pouring means 13 and further rotated at a high speed by the mold rotating device 14 to produce a casting inside. The hollow body 9a and the hollow body 9 for producing the casting on the inner wall surface are provided. 9a and a mold lid 8 attached to one end opening 2 side. The structures of the pouring means 13 and the mold rotating device 14 in this embodiment are the same as those of the conventional centrifugal casting device 100 described above, and the detailed description is omitted.

As shown in FIG. 1, the locking portion 3 is provided on one end opening 2 side of the centrifugal casting mold 9 and the mold lid 8 is provided.
For holding the mounted state. Specifically, as shown in FIG.
Locking member 3b provided with convex portion 3a extending inward
Are fixed to one end of the centrifugal casting mold 9 by bolts 3c. As shown in FIG. 3, the locking portion 3 is provided at a position where the lid attaching / detaching member 7 can be engaged, corresponding to a position where the lid attaching / detaching member 7 described later is provided. In FIG. 3, three locking portions 3 are arranged at intervals of 120 °.

As shown in FIG. 2, the mold lid 8 of this embodiment has a guide shaft 4, a lid 5, a slide member 6, a lid attaching / detaching member 7, and a lid attaching / detaching member attaching portion. Fifteen
And

The guide shaft 4 is a part functioning as a core material of the mold lid 8, is provided at the center of the mold lid 8, and discharges gas generated by the high-temperature molten metal to the outside. The road 4a is provided inside. When the mold lid 8 is mounted on the centrifugal casting mold 9, the guide shaft 4 is arranged to extend coaxially with the axial direction of the centrifugal casting mold 9.

The lid part 5 is a part for stopping the molten metal from being discharged outside the one end opening 2 of the centrifugal casting mold 9. A contact surface 5a (in this embodiment, an annular tapered surface corresponding to the inner wall surface formed as an annular tapered surface) that comes into contact with the wall surface is provided on the distal end surface. The lid 5 is provided on the distal end side of the guide shaft 4. In this embodiment, the lid 5 is fixed to the distal end side of a lid attaching / detaching member mounting portion 15 described later with bolts 16.

The slide member 6 is for operating a lid attaching / detaching member 7 described later.
Are arranged along the axial direction of the guide shaft 4.
The lid attaching / detaching member 7 is configured to operate by reciprocating relatively with respect to. As described above, in the present invention, since the mold lid 8 itself has the slide member for operating the lid attaching / detaching member 7, the mechanism of the lid attaching / detaching device 12 described later becomes simpler and the operation is also simplified. It will be easy.

As shown in FIGS. 2 and 3, the slide member 6 is formed in an annular cylindrical shape provided along the axial direction of the guide shaft 4 outside the guide shaft 4, and is formed on the inner wall surface. Has a metal processing portion 6a for making the reciprocating motion smoother.

The lid attaching / detaching member 7 engages with the slide member 6 with the reciprocating movement of the slide member 6 and is locked by the locking portion 3, and the locked state with the locking portion 3 is released. Mold lid 8
To be attachable to and detachable from the centrifugal casting mold 9.

Specifically, the lid attaching / detaching member 7 of this embodiment
As shown in FIG. 3, is rotatably mounted on the lid attaching / detaching member attaching portion 15 provided integrally with the guide shaft 4 via a shaft member 17 on the outside of the slide member 6. ing. The guide shaft 4 and the lid attaching / detaching member attaching portion 15 are provided integrally, as in this embodiment, that the lid attaching / detaching member attaching portion 15 and the guide shaft 4 are formed as separate members. In addition to the case where both are fixed, the meaning includes the case where the lid attaching / detaching member attaching portion 15 and the guide shaft 4 are formed as an integral body.

It is preferable that two or more lid attaching / detaching members 7 are provided in order to make the mounting state of the mold lid 8 stronger. In this embodiment, three or more lid attaching / detaching members 7 are provided as shown in FIG. I have. Further, the lid attaching / detaching members 7 are preferably arranged at equal angles on the circumference of the guide shaft 4 and at intervals of 120 ° in this embodiment.

Further, the lid attaching / detaching member 7 has a first engaging portion 7a which engages with the sliding member 6 with the movement of the sliding member 6, and the lid attaching / detaching member 7 is engaged by the engagement of the two. As shown in the figure, the locked portion 7b provided on the other end side (outside) is locked by the locking portion 3, and the mold lid 8 is mounted.

More specifically, the lid attaching / detaching member 7 of this embodiment is locked by the locking portion 3 as the slide member 6 moves to the front end side, and is moved to the rear end side of the slide member 6. When the slide member 6 moves to the distal end side, the tapered portion 6b provided on the slide member 6 and the first engagement portion are configured so that the locked state with the lock portion 3 is released with the movement. 7a
And the cover attaching / detaching member 7 rotates and stands up. On the other hand, when the slide member 6 moves to the rear end side as shown in FIGS. 8 and 9, the second engagement portion 6c provided on the front end side of the slide member 6 and the first engagement portion 7a engage. The standing state is released.

The tapered portion 6b of the slide member 6 is tapered toward the distal end.
When the first engaging portion 7a of the lid attaching / detaching member 7 is pressed by b, the lid attaching / detaching member 7 is also pushed outwardly in addition to the tip end side, and the mounting state of the mold lid 8 is changed. It is configured so that it can be maintained more reliably. It should be noted that the taper portion 6b is more preferably formed in such a manner that the greater the inclination angle formed between the taper portion 6b and the axial direction of the guide shaft 4, the greater the outward pressing force. As described above, in the present invention, the mounted state of the mold lid 8 is held by the direct engagement between the slide member 6 and the lid attaching / detaching member 7, so that the mold lid 8 is securely attached to the centrifugal casting mold 9. It is possible to avoid the risk of high-speed rotation in a state of being mounted and not mounted. Further, in order to operate the lid attaching / detaching member 7, it is preferable that no other operating member is interposed between the slide member 6 and the lid attaching / detaching member 7, whereby the number of components can be reduced and the mechanism can be simplified.

The slide member 6 includes a first elastic member 1 provided between the guide shaft 4 and the slide member 6.
8 urges (presses) the distal end of the guide shaft 4. Thereby, the slide member 6 can continue to press the lid attaching / detaching member 7 by the elastic force of the first elastic member 18 even in the mounted state, so that the mounted state of the mold lid can be more reliably maintained and molten metal leakage can be prevented. More can be prevented.

More specifically, the first elastic member 18 is provided on the inner surface side of the slide member 6 at the rear end surface of the annular convex portion 6d provided to protrude inward and in the vicinity of the rear portion of the guide shaft 4. It is constituted by a spring disposed between the front end face of the enlarged diameter portion 4b provided so as to protrude outward. However, the arrangement structure of the first elastic member 18 is not limited to this, and any structure may be used as long as the slide member 6 is biased toward the distal end side of the guide shaft 4. Good.

Further, the slide member 6 is provided on an outer surface near a rear portion thereof with a slide member holding portion 1 of a lid attaching / detaching device 12 described later.
The sliding member 6 has a concave portion 19 for engaging with the sliding member 6 so that the sliding member gripping portion 10 can grip the sliding member 6 more reliably.

The lid attaching / detaching device 12 grips the slide member 6 of the mold lid 8 described above and reciprocates with respect to the guide shaft 4, and opens the mold lid 8 at one end of the centrifugal casting mold. As shown in FIG. 4, it is provided with a slide member gripper 10, a reciprocating unit 11, a main body 20, and a pressing unit 21. As described above, in the present invention, the lid attaching / detaching device 12 is not directly involved in the operation of the lid attaching / detaching member 7 serving as the locking member,
Since it has only the function of gripping and reciprocating the slide member, the operation is easy and the movement of the mold lid 8 can be performed more reliably.

The slide member holding portion 10 is a portion for holding the slide member 6 of the mold lid 8, and is configured to be able to move in and out as indicated by arrows shown in FIG. That is, the slide member gripping portion 10 is moved inward to fit into the concave portion 19 of the slide member 6 to bring the slide member 6 into a grip state, and when the grip state is released, the slide member 6 is moved outward, Hold the grip 10 with the recess 1
9.

More specifically, the slide member grip 10 is
As shown in FIG. 4, it is fixed to a gripping portion mounting portion 22 provided inside the main body portion 20, the gripping portion mounting portion 22 has a rear end side concave portion 22 a, and the rear end side concave portion 22 a The first protrusion 24a of the rotation member 24 rotatably supported by the shaft member 23 is disposed so as to be engageable. Further, the rotation member 24 is provided with a second protrusion 24b, A reciprocating member 25 having a concave portion 25a with which the second convex portion 24b engages.
Are provided in the main body 20.

When the second reciprocating means 26 (air cylinder) is driven, the reciprocating member 25 moves in the h direction, and accordingly, the rotating member 24 rotates in the i direction. The slide member grip 10 moves inward and outward by moving the grip mount 22 in the j direction in accordance with the movement, so that the slide member 6 can be gripped or released. As shown in FIG. 4, three slide member grips 10 of this embodiment are provided at equal intervals (120 °) on a circumference centered on a pressing means 21 described later. Slide member gripper 10
The inward and outward movement mechanisms are provided so as to be functional for each.

The reciprocating means 11 is a driving means for reciprocating the slide member 6 relative to the guide shaft 4 and for detaching the mold lid 8 from the one end opening 2 of the centrifugal casting mold. The sliding member gripping portion 10 can reciprocate along the axial direction of the guide shaft 4.

Specifically, the reciprocating means 11 of this embodiment
Is constituted by an air cylinder, and the vicinity of the distal end of the telescopic rod 11a is fixed to the main body 20.
Is reciprocated, so that the slide member grip 10 fixed to the main body 20 is reciprocated.

Further, the lid attaching / detaching device 12 of this embodiment is
Pressing means 21 for pressing the rear part of guide shaft 4
have. This makes it possible to more reliably change the relative positional relationship between the guide shaft 4 and the slide member 6, which is required when attaching and detaching the mold lid 8. In particular,
At any time during attachment or detachment, it is necessary to position the slide member 6 at the rear end side of the guide shaft 4 and thereby release the upright state of the lid mounting member 7. For example, as shown in FIG. In a state where the rear portion of the guide shaft 4 is pressed by the means 21, the slide member 6 is gripped by the slide member grip portion 10 and moved to the rear end side, so that the slide member 6 is securely moved to the rear end side of the guide shaft 4. Can be located.

The pressing means 21 of this embodiment applies a pressing force to the slide member 6 via the first elastic member 18 at the time of mounting, so that the engaging force between the lid mounting member 7 and the slide member 6 is strengthened. Play a function.

The pressing means 21 includes a shaft portion 21a provided to be able to enter and exit from the distal end side of the main body portion 20, and a pressing portion 21d provided at the distal end side of the shaft portion 21a for pressing the rear end surface of the guide shaft. And

More specifically, the shaft portion 21a is disposed in the long groove 21b formed on the outer surface along the axial direction of the shaft portion 21a so that the rear portion is disposed in the main body portion 20 so as not to separate from the main body portion 20. The locking member 21c is inserted and locked.

Further, the pressing means 21 of this embodiment is provided between the rear end surface of the pressing portion 21d and the front end surface of the main body 20, and urges (presses) the pressing portion 21d toward the front end. It has two elastic members 27. This second elastic member 2
7 is constituted by a spring, the second elastic member 2
7 has a higher elastic force than the first elastic member 18 described above,
Thereby, the rear end face of the guide shaft 4 can be pressed against the elastic force of the first elastic member 18. When the pressing portion 21d is pressed by a force greater than the elastic force of the second elastic member 27, the shaft portion 21a can move toward the rear end inside the main body portion 20, and at this time, the locking member 21c Is configured such that the relative position in the long groove 21b moves to the distal end side.

Although the structure of this embodiment is constructed as described above, the present invention is not limited to this embodiment, but broadly covers the objects, functions and effects of the present invention. Things. For example, although three lid attaching / detaching members are provided in this embodiment, those having one or more lid attaching / detaching members that allow the mold lid to be attached / detached are widely included in the scope of the present invention. Although three locking portions are provided according to the number of the lid attaching / detaching members in this embodiment, any type may be used as long as the lid attaching / detaching member can be engaged. For example, an annular locking portion may be used. further,
Although the slide member grip portion of this embodiment grips the concave portion of the slide member, any structure may be used as long as the slide member can be gripped, for example, the slide member grip portion has a magnetic force, The slide member may be gripped by a magnetic action. Further, the centrifugal casting mold of this embodiment is of a type arranged so that the axial direction extends in the horizontal direction, and a type arranged such that the axial direction extends substantially in the vertical direction. Are also included in the scope of the present invention. Further, in this embodiment, the slide member directly engages with the lid attaching / detaching member to operate the lid attaching / detaching member, but the slide member indirectly operates the lid attaching / detaching member via another member. Such a method is also broadly included in the scope of the present invention. Further, in this embodiment, the lid attaching / detaching member is engaged with the engaging portion as the slide member moves toward the distal end, and the lid attaching / detaching member is engaged with the lid attaching / detaching member as the slide member moves toward the rear end. Although the locking state with the locking portion is released, the present invention is widely applied to the locking or unlocking between the lid attaching / detaching member and the locking portion as the slide member reciprocates. For example, conversely, the lid attaching / detaching member is locked to the locking portion with the movement of the slide member to the rear end side, and the lid attaching / detaching member is moved with the movement of the slide member to the distal end side. The one in which the locking state with the locking part is released, or the one in which the lid attaching / detaching member and the locking part are alternately locked or unlocked with one reciprocating movement of the slide member, etc. It is included in the scope of the present invention. Further, although the first elastic member and the second elastic member of this embodiment are constituted by springs, any members having a necessary elastic force may be used, for example, rubber members. You may. Further, the reciprocating means of this embodiment is constituted by an air cylinder, but is not limited to this, and may be any driving means capable of reciprocating. Further, the pressing means of the lid attaching / detaching device may be any means as long as it can press the rear part of the guide shaft, and for example, an air cylinder or the like may be used.

Next, the operation of the centrifugal casting mold lid attaching / detaching mechanism of the present invention will be described together with the centrifugal casting method of the present invention.
According to the centrifugal casting method of the present invention, the locking portion 3 provided on the one end opening 2 side, the guide shaft 4, the lid portion 5 provided on the distal end side of the guide shaft 4, and the axial direction of the guide shaft 4 are provided. A slide member 5 attached to the guide shaft 4 so as to be able to reciprocate relative to the guide shaft 4, and engages with the slide member as the slide member 5 reciprocates so that the slide member 5 can be locked to the locking portion 3. A centrifugal casting mold 9 having a mold lid 8 having a lid attaching / detaching member 7 capable of releasing the locking state with the stop portion 3, and a slide member capable of gripping the slide member 6 of the mold lid 8. Gripper 10 and slide member gripper 1
0, a reciprocating means 12 having a reciprocating means 11 for reciprocating the cylinder 0 along the axial direction of the guide shaft 4, a pouring means 13 for pouring the molten metal into the centrifugal casting mold 9, and a centrifugal casting. Rotating device 1 for rotating mold 9 at high speed
4. A centrifugal casting method using a centrifugal casting apparatus comprising
The centrifugal casting method includes a first step of attaching the mold lid 8 to one end opening 2 of the centrifugal casting mold 9, a second step of pouring into the centrifugal casting mold 9 by the pouring means 13, A third step of rotating the casting mold 9 at a high speed by the casting mold rotating apparatus 14, a fourth step of stopping the casting mold rotating apparatus 14 after the solidification of the molten metal and removing the casting mold lid 8 from the casting mold 9, and a casting mold for centrifugal casting. And a fifth step of taking out a casting from the step 9. In the first step, the slide member holding section 11 is advanced by the reciprocating means 11 in a state where the mold lid 8 is held by the slide member holding section 10. , One end opening 2 of centrifugal casting mold 9
The step of moving the slide member 6 to lock the lid attaching / detaching member 7 with the locking portion, the step of releasing the gripping state of the slide member 6 by the slide member gripper 10 and the reciprocating means 11 The fourth step includes the step of moving the slide member 6 forward by the reciprocating means 11 to grip the slide member 6, and the step of moving the slide member 6 to attach and detach the lid. A step of releasing the locked state between the member for use 7 and the locking portion 3 and a step of retracting the slide member gripping portion 10 together with the mold lid 8 by the reciprocating means 11.

Hereinafter, the centrifugal casting method of the present invention will be described in detail, but the lid attaching / detaching mechanism of the centrifugal casting mold comprising the centrifugal casting mold 9 and the lid attaching / detaching device 12 is as described above, and the explanation is omitted. Further, the configurations of the pouring means 13 and the mold rotating device 14 are the same as those of the centrifugal casting device 100 described in the related art, and the description is omitted. Further, the second, third, and fifth steps are the same as those of the conventional centrifugal casting method, and thus the detailed description is omitted. That is, the characteristic steps in the centrifugal casting method of the present invention are the first step and the fourth step, which will be described in detail.

In this embodiment, the lid attaching / detaching member 7 can be locked on the locking portion 3 with the movement of the slide member 6 toward the front end, and with the movement of the slide member 6 on the rear end side. In the first step, the mold lid 8 is gripped by the slide member gripper 10 and the slide member 6 is held by the guide shaft 4. With the reciprocating means 11
To move the slide member gripping portion 10 forward and insert it into the one-end opening 2 of the centrifugal casting mold 9, and move the slide member 6 to the distal end side of the guide shaft 4 to move the lid attaching / detaching member 7 to the locking portion 3. And a step 1c of releasing the gripping state of the slide member 6 by the slide member gripper 10 and retracting the slide member gripper 10 by the reciprocating means 11. Hereinafter, each step in the first step will be sequentially described in detail.

In the step 1a, first, the slide member gripping portion 10 is set in a state of being fitted and held in the concave portion 19 provided at the rear portion of the slide member 6. In order for the slide member 6 to be gripped by the slide member gripper 10, it is necessary to move the slide member gripper 10 inward, and this operation is performed by the second reciprocation of the lid attaching / detaching device 12, as shown in FIG. This is possible by driving the moving means 26 to retreat the reciprocating member 25, thereby rotating the rotating portion 24 counterclockwise, and further moving the gripping portion mounting portion 22 inward.

When the slide member 6 is gripped by the slide member grip portion 10, the pressing portion 21d of the pressing means 21 presses the rear end surface of the guide shaft 4, and this pressing force is larger than that of the first elastic member 18. The second elastic member 27 having an elastic force overcomes the elastic force of the first elastic member 18 for moving the slide member 6 to the distal end side of the guide shaft 4 and causes the slide member 6 to move to the rear end. Side. When the slide member 6 is located on the rear end side, the second engagement portion 6c is connected to the first engagement portion 7a.
And the upright state of the lid attaching / detaching member 7 is released, and can be mounted in the one end opening 2. This state is the state shown in FIG. After that, the reciprocating means 11 is driven to extend the rod 11 a, and the mold lid 8, the slide member grip 10 and the main body 20 are advanced and inserted into the one-end opening 2. This state is the state shown in FIG.

Step 1b is a step of moving the slide member 6 to the tip end side of the guide shaft 4 to lock the lid attaching / detaching member 7 on the locking portion 3. In this step, the reciprocating means 11
, The rod 11a is further extended, and the mold lid 8, the slide member grip 10 and the main body 20 are advanced to further approach the one end opening 2 side. By this operation, the slide member 6 relatively moves to the distal end side along the guide shaft 4, and along with this operation, the first member 7 of the lid attaching / detaching member 7 is moved.
The engaging portion 7a is rotated by being pressed by the tapered portion 6b,
The locked portion 7b of the lid attaching / detaching member 7 is locked by the locking portion 3, and the mold lid 8 is in the mounted state. This state is the state shown in FIG. This step may be performed continuously with the extension operation of the reciprocating means 11 in the step 1a.

Further, step 1c is a step in which the gripping state of the slide member 6 by the slide member gripper 10 is released, and the slide member gripper 10 is retracted by the reciprocating means 11. In this step c, the second reciprocating means 26 of the lid attaching / detaching device 12 is driven to advance the reciprocating member 25 to rotate the rotating portion 24 clockwise. To the outside. As a result, the slide member grip 10 moves outward, the slide member grip 10 is detached from the concave portion 19 of the slide member 6, and the grip state of the slide member 6 is released. Thereafter, the reciprocating means 11 is driven to contract the rod 11a, and the slide member 10 and the main body 20 are retracted. This state is the state shown in FIG. Then, the mounting operation of the mold lid 8 is completed by the series of steps 1a to 1c.

On the other hand, the fourth step is the work of removing the mold lid 8, and the reciprocating means 11 moves the slide member gripper 1.
Step 4a of advancing 0 and gripping the slide member 6;
Moving the slide member 6 to the rear end side of the guide shaft 4 to release the locked state between the lid attaching / detaching member 7 and the locking portion 3;
0c backward step 4c. Hereinafter, each step in the fourth step will be sequentially described in detail.

In step 4a, the slide member gripping section 10 is advanced by the reciprocating means 11 (FIG. 6), and the slide member 6 is gripped (FIG. 7). Specifically, the reciprocating means 11
Is driven to extend the rod 11a, and the slide member grip 10 and the main body 20 are advanced. At this time, the reciprocating member 25 of the lid attaching / detaching device 12 is at the advanced position, and the rotating portion 24 rotates clockwise to rotate the gripper attaching portion 2.
2 is located on the outside, and accordingly, the slide member holding portion 10 is located on the outside and is in an open state.

Next, the slide member grip 10 is stopped near the concave portion 19 of the slide member 6. Further, the second reciprocating means 26 of the lid attaching / detaching device 12 is driven, and the reciprocating member 25 is retracted. With this operation, the rotating portion 24 rotates counterclockwise, and the gripping portion attaching portion 22 moves inward, and accordingly, the slide member gripping portion 10 moves inward, and the concave portion 1 moves.
9 and hold the slide member 6 (the state of FIG. 7).

Step 4b is a step in which the slide member 6 is moved to the rear end side of the guide shaft 4 to release the locked state between the lid attaching / detaching member 7 and the locking section 3, and the reciprocating means 11 is driven. When the rod 11a is slightly contracted, the slide member grip 10 and the main body 20 are retracted. With this movement, the second engaging portion 6c is engaged with the first engaging portion 7a of the lid attaching / detaching member 7, and the upright state of the lid attaching / detaching member 7 is released (the state of FIG. 8).

Step 5c is a step of retreating the slide member grip 10 by the reciprocating means 11, driving the reciprocating means 11 to contract the rod 11a,
The removal operation is completed by retreating the slide member grip 10 and the main body 20 (the state of FIG. 9).

As described above, according to the centrifugal casting method of the present invention, the first step and the fourth step relating to the attachment / detachment of the mold lid are mechanized so that they can be reciprocated and can be attached / detached in a short time. In addition, the production efficiency can be significantly improved.

[0060]

According to the first and second aspects of the present invention, the weight of the casting lid can be reduced, and the lid can be reliably and safely attached and detached with a simple structure and mechanically stable. In addition, the production efficiency can be remarkably improved by simplifying. According to the third aspect of the invention, the locking state between the locking portion and the lid attaching / detaching member can be more firmly held. According to the invention described in claim 4, even in the mounted state, the mold lid can be pressed against the one end opening of the centrifugal casting mold by the elastic force of the elastic member, and the molten metal can be more reliably prevented from leaking. According to the invention described in claim 5, the slide member can be more reliably moved to the rear end side of the guide shaft. According to the inventions described in claims 6 and 7, the weight of the casting lid can be further reduced, the lid can be attached and detached accurately and safely, and the production lid can be simplified and production efficiency can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional view of an embodiment of a lid attaching / detaching mechanism of a centrifugal casting mold of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view showing the vicinity of a lid structure of the centrifugal casting mold of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a partially cutaway side view of an embodiment of a lid attaching / detaching device in the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention.

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 4;

FIG. 6 is an explanatory view showing the operation of the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention.

FIG. 7 is an explanatory view showing the operation of the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention.

FIG. 8 is an explanatory view showing the operation of the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention.

FIG. 9 is an explanatory view showing the operation of the lid attaching / detaching mechanism of the centrifugal casting mold of the present invention.

FIG. 10 is a schematic longitudinal sectional view for explaining a conventional centrifugal casting apparatus.

FIG. 11 is a sectional view taken along line CC of FIG. 11;

FIG. 12 is an enlarged sectional view showing the vicinity of a lid structure of the centrifugal casting mold of FIG.

FIG. 13 is a partial longitudinal sectional view for explaining a lid attaching / detaching mechanism of another conventional centrifugal casting apparatus.

14 is a partial longitudinal sectional view for explaining the operation of the lid attaching / detaching mechanism in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid attachment / detachment mechanism of centrifugal casting mold 2 One end opening 3 Locking part 4 Guide shaft 5 Lid 6 Slide member 7 Lid attaching / detaching member 8 Mold lid 9 Centrifugal casting mold 10 Slide member gripping part 11 Reciprocating means 12 Lid Attaching / detaching device 13 Pouring means 14 Mold rotating device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaya Nakajima 719, Terakawado-cho, Mizunami-shi, Gifu Prefecture Inside Mino Ceramics Co., Ltd. (72) Inventor Toru 719, Terakawato-cho, Mizunami-shi, Gifu Prefecture Mino Ceramics Co., Ltd. (72) Inventor Makoto Masamura 719, Terakawado-cho, Mizunami-shi, Gifu Prefecture Inside Mino Ceramics Co., Ltd. (72) Inventor Tatsuo Tomoda 5--19-16 Biwajima, Nishi-ku, Nagoya-shi, Aichi Japan Nippon High-Technologies Corporation (72) Inventor Hideo Terada 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. (72) Inventor Takanori Migami 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Yoshizumi Senda Toyota, Aichi Prefecture 1 Toyota Town, Toyota Motor Corporation

Claims (7)

[Claims] An engaging portion provided on one end opening side; a guide shaft; a lid provided on a distal end side of the guide shaft; and a guide portion provided along the axial direction of the guide shaft. A slide member which is relatively reciprocally mounted, and which engages with the slide member as the slide member reciprocates to be lockable with the locking portion; A centrifugal casting mold having a mold lid having a lid attaching / detaching member whose state can be released, a slide member gripper capable of gripping the slide member of the mold lid, and the slide member gripper. A lid attaching / detaching mechanism having a reciprocating means for reciprocating along the axial direction of the guide shaft. 2. The lid attachment / detachment member can be locked to the locking portion as the slide member moves toward the distal end, and the lock can be locked as the slide member moves toward the rear end. The lid attaching / detaching mechanism of the centrifugal casting mold according to claim 1, wherein the locking state with the portion is configured to be releasable. 3. The centrifugal casting according to claim 1, wherein the slide member has a tapered portion that becomes thinner toward the distal end, and the lid attaching / detaching member is pressed by the tapered portion. Lid attachment / detachment mechanism for mold. 4. The mechanism according to claim 1, wherein the slide member is urged toward the distal end of the guide shaft by an elastic member. 5. The lid attaching / detaching device has a pressing means for pressing a rear portion of the guide shaft.
5. The mechanism for attaching and detaching a lid of a centrifugal casting mold according to any one of claims 4 to 4. 6. A locking portion provided at one end opening side, a guide shaft, a lid provided at a tip end side of the guide shaft, and a guide portion provided along the axial direction of the guide shaft. A slide member mounted to be relatively reciprocally movable, engaged with the slide member as the slide member reciprocates and locked by the locking portion, and in a locked state with the locking portion; A centrifugal casting mold including a mold lid having a lid attaching / detaching member from which a lid is released, a slide member gripper capable of gripping the slide member of the mold lid, and the guide for sliding the gripper. A lid attachment / detachment device having reciprocating means for reciprocating along the axial direction of the shaft; a pouring means for pouring molten metal into the centrifugal casting mold; and rotating the centrifugal casting mold at a high speed. Mold rotating device for A centrifugal casting method using a centrifugal casting method, wherein the centrifugal casting method includes a first step of attaching the mold lid to one end opening of the centrifugal casting mold, and the centrifugal casting mold by the pouring means. And a third step of rotating the centrifugal casting mold at a high speed by the mold rotating device.
And a fourth step of stopping the mold rotating device after the solidification of the molten metal and removing the mold lid from the centrifugal casting mold, and a fifth step of taking out a casting from the centrifugal casting mold, A first step of, in a state where the mold lid is gripped by the slide member gripping part, advancing the slide member gripping part by the reciprocating means and inserting it into one end opening of the centrifugal casting mold; Moving the slide member to lock the lid attaching / detaching member on the locking portion, releasing the gripping state of the slide member by the slide member gripping portion, and moving the slide member gripping portion by the reciprocating means. The fourth step is a step of moving the slide member by moving the slide member grip portion forward by the reciprocating means, and moving the slide member. Centrifugal casting, characterized in that it comprises a step of releasing the Kifuta detachable member the locking state between the locking portion and the step of retracting the slide member gripping portion by the reciprocating means. 7. The lid attaching / detaching member is locked by the locking portion as the slide member moves toward the distal end, and the locking portion is locked as the slide member moves toward the rear end side. Is configured to be released from the locked state, and the first
In the step, the mold lid is gripped by the slide member gripper, and in a state where the slide member is located at the rear end side of the guide shaft, the slide member gripper is advanced by the reciprocating means, Inserting the slide member into one end opening of the centrifugal casting mold, moving the slide member to the distal end side of the guide shaft to lock the lid attaching / detaching member on the locking portion, Releasing the gripping state of the slide member, and retreating the slide member gripper by the reciprocating means, wherein the fourth step comprises moving the slide member gripper forward by the reciprocating means, A step of gripping the slide member, and moving the slide member to a rear end side of the guide shaft to release a locked state between the lid attaching / detaching member and the locking portion. 7. The centrifugal casting method according to claim 6, further comprising: a step of causing the slide member gripping portion to retreat by the reciprocating means.