JP2001252746A - Device for boring gas vent hole for vertical split mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas vent hole boring device for a vertical split mold which can vent the sufficient gas even in the case the front and rear parts of the mold is thick, and can bore the gas vent hole at the most suitable position in the mold even in the case the thickness of the mold is changed by the change of the characteristic of molding sand or the change of a cavity shape in the mold caused by the exchange of a pattern plate, and also, can cope with even the case of boring the gas vent hole in the high strength mold and even the case of boring the deep gas vent hole. SOLUTION: This gas vent hole boring device for the vertical split mold is characterized in that, at the lower part of the shifting carriage 5 disposed in the upper part of a mold carrying conveyor 1, a mold detector 6 with which the shifting of a shifting carriage 5 is stopped by detecting a recessed part H formed in a prescribed position on the upper end surface of the mold, and plural needles 11, 11 for boring the gas vent holes which are elevated/lowered by a rise and fall cylinder 8 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for piercing a vertical split mold with a gas vent hole for discharging gas generated during pouring out of the mold.

[0002]

2. Description of the Related Art Conventionally, in the venting of a vertical split mold, a groove is formed in the parting surface from the vicinity of the mold cavity to the upper end surface of the mold, and the gas generated by the groove in the parting surface is discharged out of the mold. .

[0003]

However, the above-mentioned gas vent groove is formed on a parting surface, and when the mold thickness in the front-rear direction of the mold is large (when the casting material is large), sufficient gas is released. It could not be pulled out. Therefore, we examined a device to form a vent hole at the position inside the mold,
In order to realize the equipment, the thickness of the molded mold changes due to the change of the characteristics of the mold sand and the change of the mold cavity shape with the replacement of the pattern plate, and the mold position shifts. There is a problem that the gas needle cannot make a gas vent hole at the best position of the mold. Further, when a gas vent hole is formed in a high-strength mold or when a deep gas vent hole is formed, there is a problem that a gas needle is bent by resistance of the mold. The present invention has been made in view of the above problems, and can sufficiently release gas even when the mold thickness in the front-rear direction of the mold is large (when the casting material is large).
Degassing holes are drilled at the optimal position of the mold even if the thickness of the molded mold changes due to changes in the characteristics of the mold sand or the change of the mold cavity shape due to pattern plate replacement. It is an object of the present invention to provide a vertically split mold gas hole drilling apparatus which can be used for forming gas vent holes and deep gas vent holes in a high-strength mold.

[0004]

In order to achieve the above-mentioned object, a gas hole drilling device for a vertical split mold according to the present invention comprises a group of a large number of vertical split molds in which a parting surface is sequentially matched to form a continuous state. Above the mold transport conveyor to be intermittently moved, a movable carriage is disposed so as to be reciprocally adjustable in the traveling direction of the mold transport conveyor, and is provided at a predetermined position on an upper end surface of the vertically split mold that has been matched to the lower part of the movable carriage. A mold detector for detecting the recess formed and stopping the movement of the movable carriage is attached, and the movable carriage is provided with a plurality of gas needles which are moved up and down by a lift cylinder at a position separated from the mold detector by a predetermined dimension. It is characterized by having been provided.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. At a predetermined position of a mold conveying conveyor 1 for intermittently moving a large number of vertical split molds M, M groups in which the parting faces F, F are successively matched to form a continuous state, a portal frame 2 places the mold conveying conveyor 1 at a predetermined position. It stands upright. A rail 3 parallel to the traveling direction of the mold conveying conveyor 1 is laid on the ceiling of the gate-shaped frame 2, and reciprocates on the rail 3 by the operation of the motor 4. The movable trolley 5 is mounted so as to be adjustable.

At the lower part of the movable carriage 5, a predetermined position of the upper end surface of the vertical split molds M, M (the upper end of the parting plane F in the embodiment).
A mold detector 6 for detecting the recess H formed in the above and stopping the operation of the motor 4 is suspended via a frame 7. Further, a mounting plate 9 which is lifted and lowered by the operation of the lifting cylinder 8 is suspended from the movable carriage 5, and the mounting plate 9 is provided with air-type vibrators 10 and 10 as vibration means. Gas needles 11 for vertical oscillation
Is suspended.

The gas needles 11, 11 are mounted at positions separated from the mold detector 6 (parting plane F) by a predetermined distance so as to correspond to the required positions of the mold cavities C of the vertical split molds M, M. ing. Therefore, the gas needles 11, 11
Corresponds to a predetermined position about the concave portion H of the parting surface F irrespective of the mold thickness of the vertical split mold M, M
G can be drilled. The pattern play
When the position where the gas hole is to be provided changes due to the change in the shape of the mold cavity C due to the replacement of the mold, the mounting position and length of the gas needles 11 are changed according to the position where the gas hole is to be provided. It is good to let.

In the apparatus constructed as described above, the mold conveying conveyor 1 is operated in the state shown in FIG. 1 to move the vertically split molds M and M groups one pitch to the right and stop. During this time, when the mold detector 6 is in the operating state and detects that the concave portion H of the mold has passed, the motor 4 is operated so as to move and adjust the moving carriage 5 rightward in FIG. If the concave portion H does not pass through, a signal for operating the motor 4 is transmitted so as to adjust the moving carriage 5 to the left in FIG.

By the operation described above, the movable carriage 5 is moved to the left or right, and the mold detector 6 detects the concave portion H of the mold.
Is detected, and the carriage 5 is stopped. The stop of the moving carriage 5 causes the gas needles 11, 11 to be positioned above a required position of the mold cavity C (a position separated by a required dimension from the parting plane F). Next, the elevating cylinder 8 is operated to lower the gas needles 11, 11 via the mounting plate 9, and the air type vibrators 10, 10 as vibrating means are operated to move the gas needles 11, 11 up and down. Give vibration. Note that when the vertical split molds M and M group are moved to the right by one pitch and stopped, the mold detector 6 detects the concave portion H of the mold (the position of the concave portion H of the mold is just below the mold detector 6). ), The process proceeds to the next step (the vertical cylinder 8 is lowered while applying vertical vibration to the gas needles 11 and 11).

As a result, the gas needles 11, 11 are pierced into the required positions of the mold cavities C of the vertical split molds M, M while vertically vibrating, and are lowered to a predetermined depth. The gas needles 11, 11 are withdrawn from the vertical molds M, M, and gas vent holes G, G are formed. When the hardness of the vertical split molds M, M is not so high or when the depth of the gas vent hole is shallow, the gas needles 11, 11
The gas vent holes G, G can be formed even if the air-type vibrators 10, 10 as the vibrating means are omitted.
Hereinafter, the above operation is repeatedly performed.

In the embodiment of the present invention, the air-type vibrator is shown as the vibrating means. However, an electric vibrator may be used as long as it functions as the vibrating means. The method does not matter.

[0012]

As is apparent from the above description, the present invention detects the concave portion formed at a predetermined position on the upper end surface of the mold and detects the movement of the movable truck at the lower portion of the movable truck disposed above the mold conveying conveyor. A gas detector for the vertical split mold is provided with a mold detector for stopping the operation and a plurality of gas needles to be moved up and down by the elevating cylinder, so that a gas vent hole is formed inside the vertical split mold. Even if the thickness of the molded mold changes due to the change in the characteristics of the mold sand or the change of the mold cavity shape due to the change of the pattern plate, the gas vent hole is properly placed at the required position of the mold. Can be drilled. By giving vibration to the gas needle, there are various effects such as a case where a gas vent hole is formed in a high-strength mold and a case where a deep gas vent hole is formed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a right side view in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold conveyor 5 Moving trolley 6 Mold detector 8 Elevating cylinder 10 Air-type vibrator 11 Gas needle C Mold cavity F Parting surface G Gas vent hole H Depression M Vertical split mold

Claims (2)

[Claims] 1. A movable carriage 5 is mounted on a mold transport conveyor 1 above a mold transport conveyor 1 for intermittently moving a large number of vertically split molds M, M groups in which a parting plane F, F is successively matched to form a continuous state. The reciprocating movement can be adjusted in the traveling direction of
Vertical split molds M, M matched to the lower part of the movable carriage 5
A mold detector 6 for detecting the concave portion H formed at a predetermined position on the upper end surface of the movable carriage 5 and stopping the movement of the movable carriage 5 is attached to the movable carriage 5 at a position away from the mold detector 6 by a predetermined distance. A gas hole drilling device for a vertical split mold, comprising a plurality of gas needles 11, 11 which are raised and lowered by a lifting cylinder 8. 2. The apparatus according to claim 1, wherein said plurality of gas needles are vertically vibrated via a vibration means.