JPS6114061A - Core setter in centrifugal casting machine - Google Patents

Abstract

PURPOSE:To hold surely front caps which can hold a core during the stoppage of a die by providing the front caps to the end of a rotating body and disposing engaging members which engage the front caps to the rotating body. CONSTITUTION:A cylindrical part 24 is provided through the inside of supports 19A, 18B to the rotating body 11 and the front caps 13A, 13B are disposed via front cap attaching parts 25A, 25B to both ends of the part 24. The plural engaging members 29 are provided to the circumferential edge at the opening end of the die 1 in a centrifugal casting machine 28. The members 29 are disposed oscillatably around pins 309. The body 11 is thoroughly disconnected from the supports 19A, 19B by a spring 23 and a lever 16 when a hydraulic cylinder is actuated to move an arm 3 so as to approach the die 1. A push ring 35 is also spaced from the members 29. The front cap 13A is surely held to the die 1 by such core setter.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a core setter in a centrifugal casting machine for attaching a core to the open end of a centrifugal casting mold.

Conventional Structure and Problems When manufacturing a cast pipe by centrifugal casting, it is necessary to set a core for forming the inner surface of the pipe socket at the open end of a centrifugal casting mold. For this reason, conventionally, as shown in Japanese Patent Publication No. 49-18694, for example, the core is held at the tip of an arm that can move toward and away from the open end of the centrifugal casting mold in the axial direction of the mold. When the front lid is attached to the mold, the front lid is cut off from the arm and rotates at high speed together with the mold, and a centrifugal force key is used to hold the front lid on the mold. A device equipped with an attached locking device has been proposed. However, the centrifugal locking device does not function unless centrifugal force is applied when the mold rotates, and the front cover cannot be used until the mold rotates at high speed after the front cover is attached when the mold is stopped. The drawback is that the lid cannot be held securely.

In order to eliminate this drawback, conventionally, for example,
As shown in Publication No. 894, it has been proposed that a magnet is used to temporarily hold the front cover when the mold is stopped, but in this case as well, the locking tool is attached to the front cover when the mold is stopped. The problem is that temporary holding using magnets is still insufficient.

OBJECT OF THE INVENTION Therefore, an object of the present invention is to enable the front cover to be held securely even when the mold is stopped.

Structure of the Invention In order to achieve the above object, the present invention comprises: an arm movable toward and away from the open end of a centrifugal casting mold in the axial direction of the mold; a pair of levers that are swingable around the arm in the direction of movement of the arm; a pair of annular supports that are provided opposite to each other at the tips of each lever and that are biased away from each other; Penetrates between both supports and acts on both supports tSM
The ffi biasing force includes a 1" double support 1 support 516, a rotary body in the mold axis direction, and a rotary body provided at the end of the rotary body, which is capable of holding the core, and by moving the arm, the open end of the mold is a plurality of front lids that can be fitted to the mold, and a plurality of front lids that are provided on the edge of the opening end of the mold, and that are biased to engage with the rotating body when the front lid is fitted to the opening end, so that the rotating body an engaging member capable of holding the lever in the mold; and a push ring attached to the tip of the lever and abutting the engaging member during movement of the arm to retract the engaging member from the moving path of the rotating body. As the arm moves, it comes into contact with a lever portion on the proximal end side of the push ring and swings this lever, and the swinging of this one flange brings the two supports closer to each other. The present invention includes a stopper that cuts off the rotating body and separates the push ring from the engagement member.

Therefore, since the engaging member is biased to engage with the rotating body, the front cover can be held securely even when the mold is stopped, and the push ring acts when the front cover is attached or removed. Since the engaging member can be retracted from the moving path of the rotating body, the front cover can be attached and detached without any trouble.Moreover, the push ring can be used as a lever for connecting and releasing the support body and the rotating body. Mounted above interlocking,
Since the structure is linked to the release operation, there is no need for a separate mechanism for operating the push ring, and the structure can be simplified and the number of parts can be reduced.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 2 to 8, (1) is a horizontal centrifugal casting mold, which is capable of casting a cast iron pipe (2). (3
) is an arm, whose base end (4) is a cylinder device (
5), and is capable of moving toward and away from the open end (6) of the mold in the mold axial direction (horizontal direction).

(7) is a swing drive device for the arm (3), which is linked to the connecting shaft (8) between the cylinder device (5) and the base end (4), and rotates the connecting shaft (8) around the axis. By rotating the arm (3), the tip of the arm (3) is configured to swing between the mold axis position (9) and a position 00 off the axis as shown in FIG. There is.

A rotary body αυ is provided at the tip of the arm (3) in the direction of the mold axis, and both ends of this rotary body Qυ hold the core (6) and are connected in the direction of the mold axis of the arm (3). The mold (
A pair of front lids (18A) that are attached to and detached from the open end (6) of 1)
(18B) is provided. Further, the arm (3) is rotatable around its axis, and a rotation drive device (not shown) for this purpose is provided at the base end (4).

Next, the arm (3) and its surroundings will be explained in detail based on FIG. αΦ is a cylindrical fixed arm body, and a rotating shaft U~ is supported inside thereof. A pair of levers (16A) (16B) are arranged on the outside of the arm body Q4) in the moving direction of the arm (3), that is, in the mold axis direction. The base end (T) is swingably connected to a ring (Iη) that is rotatably fitted onto the arm body (14) near the base end (4). Lever (16A) (16B )
The swinging direction of the arm (3) coincides with the moving direction of the arm (3).

Annular supports (19A) (19B) facing each other are fixed to the tips of each lever (16A) (16B), and leg supports (19A) (19B) are attached to the tips of the rotation axis aυ. The annular body is engaged with openings at both ends of the annular body in the axial direction of the mold. That is, as shown in FIGS. 4 to 6, engaging protrusions υ are formed at both ends of the annular body.
On the other hand, the leg supports (19A) (19B) have engaging protrusions C.
Other engaging protrusions (22A) (22B) are formed to engage with the annular body (4) and the support (19A).
(19B) can be moved relative to each other in the axial direction within a certain range. Leg support (19A) (19B
) A compression coil spring is interposed between the leg supports to urge the leg supports apart from each other.

The rotating body 0υ has a cylindrical part that penetrates the inside of the support body (19A) (19B), and front lid attachment parts (25A) (25B) attached to both ends of the cylindrical part (goods). The front lids (18A) (18B) are attached to the ends of the front lid attachment portions (25A) (25B). A pair of opposing tapered surfaces (2
6A) (26B) is formed, and the support (19
A) (19B) has a tapered surface (26A) (26B)
Other tapered surface (27A) corresponding to i;
! (27B) is formed. Therefore, the support (
19A) (19B) Tapered surfaces (26A) (27A) and tapered surfaces (26B), as shown in FIGS.
(27B) They are pressed against each other, and the rotating body α
υ will be supported by the supports (19A) (19B).

A plurality of engaging members are provided in the circumferential direction around the periphery of the open end (6) of the mold (1) in the centrifugal casting machine (7).As also shown in Figs. , each engaging member can swing freely around the bottle, and is integrally formed with a centrifugal weight 6N that opens and opens as the mold (1) rotates. In addition, in FIG. 1, the 0 position is a torsion coil spring fitted onto the outside of the bottle, which biases the centrifugal force weight 6D to open. An annular engagement ring (■) is provided at the base end position of the front lid attachment portion (25A') (25B), and each engagement member has an engagement protrusion that can engage with the engagement ring (C). Part ■ is a bottle (7
) is integrally formed inside.

At the tips of the levers (16A) (16B), push rings (85A) (85B) are attached to supports (19A) (19B).
). This push ring (85A)
(85B) has a structure in which a protrusion is erected on the periphery of the disc, which contacts the centrifugal force weight 0]) of the engaging member to close the centrifugal force weight 0■, thereby causing the engagement. It is possible to move the mating protrusion (2) outwardly away from the mating ring acid.

An opening (fl16A) (86B) is formed in the lever (16A) and (16B) portion on the proximal end (G) side of the push ring (85A) (85B), and the opening (86A)
) (86B) has a stopper ring (87A) around it.
(87B) is installed. In FIG. 1, a stopper (to) is provided in the centrifugal casting machine (c) portion corresponding to the stopper ring (87A).

This stopper group consists of a first stopper Bordeaux that is attached to the centrifugal casting machine (2) and whose tip (at its tip) abuts the stopper ring (87A), and a first stopper Bordeaux (which is attached to the tip of this first stopper bolt) and which has an opening (86A) that comes into contact with the stopper ring (87A). ) and a second stopper bolt @η which passes through the arm body aΦ and comes into contact with the arm body aΦ. In addition, the amount of screwing out from these stopper Bordeaux (older centrifugal casting machines) or the first stopper Bordeaux can be adjusted, and the contact position with the stopper ring (87A) or the arm body can be adjusted. has been done.

In such a configuration, in order to attach the front cover (18A) with the core to the mold (1), first rotate the rotation axis ara of the arm (3), and attach the support body (19A) (19B). , rotating body QJ), levers (, 16A), (16B), etc., are rotated integrally around the axis of the arm body (14), and the front cover (
188) to face the open end (6) of the mold (1). At this time, the arm (3) is moved to the mold axis position (
9).

Next, the cylinder device (5) is operated to bring the arm (3) closer to the mold (1). Then, the stopper ring (17
Before A) comes into contact with the tip part ■ of the first stopper Bordeaux, the push ring (85A) comes into contact with the centrifugal force weight 61) of the engaging member 61), as shown in Fig. 4, and resists the spring). Then, this centrifugal weight S→ is gradually closed. Then, the engaging member is rotated around the pin, and the engaging protrusion (b) is moved radially outward of the mold (1). As a result, the engagement protrusion (■) is retracted from the movement path of the front cover attachment part (25A), that is, the retaining ring (25A), and the engagement ring (■) is moved away from the engagement protrusion (to).
Pass the position.

At this point, the stopper ring (87A) comes into contact with the tip of the first stopper Bordeaux, but since the arm (3) still continues to move, the base end 081 of the lever (16A) further approaches the centrifugal casting machine. and 9 result lever (16A)
As shown in FIG. 5, the tip side of the mold starts to move away from the mold <1). As a result, as shown in FIG. 6, the centrifugal force weight 6 of the engagement member rotates again under the action of the spring, and the engagement protrusion (B) of the engagement member engages the engagement ring. engage with. Along with this, the tapered surface <26A) (27A)
are separated from each other, and the rotating body aυ and the support body (19A) are separated.

When the arm (3) moves further, the engagement protrusion (2'D) of the annular body &J is the engagement protrusion (22) of the support (19B).
B) and swings the lever (16B) against the spring (A). This results in a tapered surface (26B)
(27B) Somehow separated, the rotating body mouth) is connected to the support body (
19B) was also severed. Thereafter, as shown in FIG. 1, the arm body (14) comes into contact with the second stopper bolt extension υ, and at this point the arm (3) stops moving. Then, the rotating body αυ is completely cut off from the support (19A) (19B), and the push ring (85A
) is separated from the engaging member -, and the front lid attachment part (25A) is attached to the mold (1) by the engaging member (2), and the front lid (1
8A) is held in the mold (1).

In this state, when the mold (1) is rotated at high speed and melt is poured into the mold (1), the front cover (i8A) is strongly pressed against the mold (1) by the action of the centrifugal force 0η of the engaging member. The cast iron pipe (2) is formed as shown in FIG. 2 while the thrust force from the molten metal is stopped.

Once the cast iron pipe (2) is formed, the arm (3) is moved away from the mold (υ).Then, the front cover (18A) is separated from the mold (1) by the opposite operation to that described above. Ru.

Therefore, as shown in Fig. 3, the arm (3) is swung and moved away from the axis (g fffi QO), and the arm (3) is rotated around the axis to open the front cover (18B). The front lid (1f9B) should face upward.
) is cooled and cleaned during the casting operation, and a new core (6) is attached to this front cover (18B) and the above-mentioned cycle is repeated. The cast iron pipe (2) is pulled out from the mold (1) during the installation of the core vr and transported out.

In the above, a pair of front lids (18A) (18B) are provided at both ends of the rotating body (2), and both front lids (IJ3A) (
18B) is used alternately, but the rotation body 0
A front cover may be provided only on one end side of υ,
In that case, it is not necessary to rotate the arm (3) around the axis.

Effects of the Invention As described above, according to the present invention, the front cover can be reliably held even when the mold is stopped by the action of the engaging member that is urged to engage with the rotating body. Become.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of a main part thereof, FIG. 2 is an overall plan view, FIG. 3 is a side view, and FIGS. 4 to 6 are explanatory views of the operation.

Claims (1)

[Claims] 1. An arm movable toward and away from the open end of the centrifugal casting mold in the axial direction of the mold; A pair of levers that are swingable in the direction of movement of the arm; a pair of annular supports that are provided opposite to each other at the tips of the levers and are biased away from each other; a rotating body in the mold axis direction that is penetrated and supported by both supports by the biasing force acting on both supports; and an arm that is provided at an end of the rotating body and is capable of holding the core. a front cover that can be fitted to the opening end of the mold by movement of the mold; and a plurality of front lids provided on the periphery of the opening end of the mold so as to engage with the rotating body when the front lid is fitted to the opening end. an engaging member that is biased by and capable of holding the rotating body in the mold; and an engaging member that is attached to the tip of the lever and that comes into contact with the engaging member while the arm is moving to hold the rotating body of the rotating body. a pushing ring to be evacuated from a movement path; movement of the arm abuts a lever portion on a proximal end side of the pushing ring and swings the lever, and the swinging of the lever causes the two supports to approach each other; A core setter for a centrifugal casting machine, comprising a stopper for separating the supporting body and the rotary body and for separating the push ring from the engagement member.