JPH05212529A - Device and method for setting sleeve - Google Patents

Abstract

PURPOSE:To automatically set a sleeve into a mold and to execute casting in the condition removing foreign matter in the casting mold. CONSTITUTION:In this sleeve setting device, a supporting plate 22 is fitted in the front of a base plate 21 to be freely moved vertically/horizontally, a holder 23 holding the sleeve W to be freely slidable from the inside is fixed to the whole surface of the supporting plate 22, a cylinder unit 24 is fixed to the front surface of the base plate 21, and a rod 25 in this cylinder unit 24 is penetrated to a hole 26 formed on the supporting plate 22. A plate-like pusher 27 is fitted to the tip part of this rod 25, a hole 28 having larger diameter than a holder 23 is formed in this plate-like pusher 27, and the holder 23 penetrating this hole 28 is made to be faced to the front part. Further, an air blow nozzle 29 is fitted to the front surface of the pusher 27, and connected to a compressed air source through a flexible hose 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for setting a sleeve in a mold when casting a cylinder block or the like.

[0002]

2. Description of the Related Art In casting a cylinder block made of aluminum alloy, a sleeve made of cast iron has conventionally been cast around the inner peripheral portion of the cylinder barrel which is a sliding contact surface with a piston. As a casting method, a sleeve is generally attached to the outer peripheral surface of a sand core or the like and set in a mold.

However, in the above-mentioned method, a fine gap is formed between the outer peripheral surface of the sand core and the inner peripheral surface of the sleeve, the molten aluminum penetrates into this gap, and the aluminum adhered to the inner peripheral surface of the sleeve after casting ( Burr) must be removed.
In view of this, in Japanese Patent Laid-Open No. 64-15262, a sleeve is set in advance in a mold for producing a sand core so that there is a gap between the outer peripheral surface of the sand core and the inner peripheral surface of the sleeve. Trying not to form.

[0004]

As described above, even if the gap is not formed between the outer peripheral surface of the sand core and the inner peripheral surface of the sleeve, the sleeve is set at the time of setting each of the sand cores. If burrs or the like from the previous shot are left on the inner surface of the mold with which the end faces come into contact, the sleeve cannot be set at an accurate position. Further, if foreign matter is present between the end surface of the sleeve and the inner surface of the mold, the molten metal enters from the end surface of the sleeve during casting.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a holder for slidably holding a sleeve to be loaded in a sleeve receiver provided in a mold from inside, and moving back and forth along the holder. The sleeve set device includes a pusher that pushes out the sleeve held by the holder and transfers it to the sleeve receiver, and an air nozzle attached to the pusher to remove foreign matter in a gap between the sleeve receiver and the inner surface of the mold. It was set up in.

[0006]

[Function] Before completely loading the sleeve into the sleeve receiver provided in the mold, insert an air nozzle into the gap between the sleeve receiver and the inner surface of the mold to blow air, and completely insert the sleeve into the gap and the sleeve receiver. Foreign matter existing on the inner surface of the mold, which the sleeve end surface abuts when loaded, is removed.
In order to completely remove the foreign matter, air blowing is performed again with the sleeve end surface pressed against the inner surface of the mold even after the sleeve receiver is completely loaded with the sleeve.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a cross-sectional view showing a state before loading a sleeve of a casting device to which the sleeve setting device according to the present invention is applied, FIG. 2 is a view taken in the direction of arrow AA in FIG. 1, and FIG. 3 is related to the present invention. It is a principal part perspective view of a sleeve setting device.

The casting apparatus comprises a fixed die 1 and a movable die 2,
The fixed die 1 is provided with a runner 3 and a guide pin 4, and the movable die 2 is composed of a plurality of split dies 6 which can be moved back and forth by a cylinder unit 5, split dies 7 and cavities located at the corners of the split dies 6, 6. It consists of a split mold 8 that forms the bottom of
The split mold 7 is provided with a guide bush 9 which fits into the guide pin 4 of the fixed mold 1, and the split mold 8 is provided with a sleeve receiver 10.
Further, the insert 11 for forming the outer peripheral surface of the cylinder barrel is fixed so as to surround the sleeve receiver 10. The gap S formed between the sleeve receiver 10 and the insert 11 is actually narrow as shown in FIG. 2, but in FIG. 1 the gap S is made larger for easier understanding.

In the sleeve setting device 20, a support plate 22 is attached to the front (left side in FIG. 1) of a base plate 21 which can be moved up and down and left and right with a constant interval, and the sleeve is attached to the entire surface of the support plate 22. A holder 23 that holds W slidably from the inside is fixed.

A cylinder unit 24 is fixed to the front surface of the base plate 21.
The rod 25 of the above is penetrated through the hole 26 formed in the support plate 22, a plate-like pusher 27 is attached to the tip of this rod 24, and a hole 28 having a larger diameter than the holder 23 is formed in this plate-like pusher 27. The holder 23 is made to pass through the hole 28 and face forward.

By setting the amount of protrusion of the holder 23 from the pusher 27 to be shorter than the length of the sleeve W,
When the sleeve W is attached to the holder 23, the tip of the sleeve W slightly projects from the holder 23. By doing so, the sleeve W can be smoothly transferred to the sleeve receiver 10.

Further, an air blow nozzle 29 is attached to a portion of the front surface of the pusher 27 which is located above and below the holder 23, and the air blow nozzle 29 is connected via a flexible hose 30 to a pressure air source (not shown).

A procedure for casting a cylinder block by casting a sleeve W using the sleeve setting device 20 having the above-described structure will be described below. First, as shown in FIG. 1, with the fixed mold 1 and the movable mold 2 opened, the sleeve setting device 20 is inserted between the fixed mold 1 and the movable mold 2 from above.
Come down. At this time, the sleeve W is already attached to the holder 23 of the sleeve setting device 20.

From this state, the sleeve setting device 20 is advanced to the left in the figure. Then, when the tip of the holder 23 comes into contact with the end surface of the sleeve receiver 10, air is ejected from the air blow nozzle 29 toward the gap S. The foreign matter such as burrs remaining in the gap S due to the air blow, particularly the foreign matter 31 attached to the inner surface of the split mold 8 with which the end surface of the sleeve W contacts when the sleeve W is completely loaded into the sleeve receiver 10, is effective. Is removed out of the mold.

Next, while continuing the air blow, the cylinder unit 24 is extended and the sleeve W is loaded around the sleeve receiver 10 by the pusher 27. Then, immediately before the sleeve W is completely loaded, that is, immediately before the tip of the sleeve W contacts the inner surface of the split mold 8, the air blow is stopped once.

After that, the sleeve W is completely loaded into the sleeve receiver by the pusher 27. This state is shown in FIG. Then, air is blown again with the pusher 27 pressing the sleeve W against the inner surface of the split mold 8 to completely remove the foreign matter remaining in the gap S.

After that, the sleeve setting device 20 is retracted and raised to remove the sleeve setting device 20 from between the fixed mold 1 and the movable mold 2, and the movable mold 2 is further moved to the right, as shown in FIG. The fixed mold 1 and the movable mold 2 are matched with each other as shown in FIG.
The molten metal is supplied into the cavity formed by and the sleeve W is cast into a cylinder block.

After that, the movable die 2 is moved to the left, the cylinder unit 5 is further compressed, and the split dies 6 are retreated to take out the product cylinder block.

[0019]

As described above, according to the present invention,
Since the sleeve can be automatically set in the mold, work efficiency is significantly improved.

Before the sleeve is completely loaded into the sleeve receiver, an air nozzle is inserted into the gap between the sleeve receiver and the inner surface of the mold to blow air. Since casting can be performed in a state where foreign substances existing on the inner surface are removed, the sleeve can be set at an accurate position and the molten metal does not enter between the sleeve and the sleeve receiver,
It is possible to omit or simplify the work of removing burrs and the like after casting.

Further, even after the sleeve has been completely loaded in the sleeve receiver, foreign matter can be completely removed by performing air blowing again while the sleeve end surface is pressed against the inner surface of the mold.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state before a sleeve is loaded in a casting device to which a sleeve setting device according to the present invention is applied.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a perspective view of a main part of a sleeve setting device according to the present invention.

FIG. 4 is a cross-sectional view of the casting apparatus showing a sleeve loaded state.

FIG. 5 is a sectional view of the casting apparatus during casting.

[Explanation of symbols]

1 ... Fixed type, 2 ... Movable type, 10 ... Sleeve receiver, 20 ...
Sleeve setting device, 23 ... Holder, 27 ... Pusher,
29 ... Air blow nozzle, S ... Gap, W ... Sleeve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Juichi Sagawa, 1-10-1 Shin-Sayama, Sayama City, Saitama Prefecture, Honda Saitama Factory Co., Ltd.

Claims (3)

[Claims] 1. A sleeve set device for loading a sleeve into a sleeve receiver provided in a mold, the device comprising a holder for slidably holding the sleeve from inside, and a holder for holding the sleeve by advancing and retracting along the holder. A pusher that pushes out the formed sleeve and transfers it to the sleeve receiver; and an air nozzle attached to the pusher to remove foreign matter in a gap between the sleeve receiver and the inner surface of the mold. Sleeve setting device. 2. Before completely loading the sleeve on the sleeve receiver provided in the mold, an air nozzle is inserted into the gap between the sleeve receiver and the inner surface of the mold to blow air, and the sleeve is inserted into the gap and the sleeve receiver. A sleeve setting method, characterized in that foreign matter existing on the inner surface of the mold, which the sleeve end surface abuts when completely loaded, is removed. 3. The method for setting a sleeve according to claim 2, wherein air blowing is performed again with the sleeve end surface being pressed against the inner surface of the mold even after the sleeve receiver is completely loaded with the sleeve. ..