JP2584593Y2 - Vertical casting mold - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical casting mold.

[0002]

2. Description of the Related Art In the case of a vertical mold provided with a plurality of cavities in a vertical direction, pouring a molten metal from an upper gate thereof causes
The molten metal first flows from the vertical runway to the lower cavity through the lower horizontal runway, but the flow of the molten metal at that time becomes faster as the distance from the spout increases, so the air in the vertical runway As a result of involving a large amount of water and flowing down, there arises a problem that a poor quality product is produced.

In the sand mold disclosed in Japanese Utility Model Laid-Open No. 60-186940, in order to solve this kind of problem, a protruding portion is provided between upper and lower horizontal runners connected to each cavity, and the protruding portion makes the vertical shape. The flow path of the runner is narrowed to suppress the flow velocity of the molten metal.

[0004] However, when such a flow path is formed, the amount of the molten metal flowing down from the spout can be reduced at the projecting portion, but the flow velocity increases in the sandwiched flow path portion. Therefore, the amount of air entrainment also increases in proportion to this, and as a result, the amount of air entrainment as a whole is not much different.

[0005]

[Problem to be solved by the present invention] The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new mold for vertical casting that can surely reduce the amount of air entrainment.

[0006]

In other words, the present invention provides a vertical casting mold for achieving such a problem as a vertical casting middle part of a vertical runway communicating with an upper gate.
In minutes, approximately equal to the cross-sectional area of Tateyudo, and with upper center provided substantially heart-shaped molten metal received provided a recess, on both sides of the receiving molten metal so as to extend along the receiving molten metal, the upper and lower longitudinal runner To form a bypass passage much narrower than the cross-sectional area of the vertical runway.

[0007]

Embodiments of the present invention will be described below. The drawing is a mold showing an embodiment of the present invention. In this mold 1, a vertical runner 3 communicating with an upper gate 2 is formed. Each of the horizontal runners 12 and 22 communicating with the cavity 11 and the lower cavity 21 is branched.

In the drawing, reference numeral 5 denotes a molten metal receiver for flowing down the laminar flow while keeping the velocity of the molten metal flowing down the vertical runner 3 constant, and the molten metal receiver 5 is arranged vertically and horizontally. The runners 12 and 22 are disposed in the vertical runner 3 at an intermediate portion of the branch.

The molten metal receiver 5 is for receiving the flowing molten metal as it is and reducing the flow velocity of the molten metal so as to smoothly divide the molten metal into the right and left bypass flow paths 6, 6. A concave part 5a is provided at the center of the top. The vertical runner 3 is formed in a substantially heart shape, and is disposed at the center of the vertical runner 3 so as to close the vertical runner 3 with a large top surface comparable to the cross-sectional area of the vertical runner 3. As shown in FIG. 2, the upper vertical runner 3 is divided into bypass passages 6, 6 having a flow area approximately half here, and along the peripheral surface of the molten metal receiver 5. Lower vertical runway 3
It is constituted so that it may communicate with.

In the drawings, reference numerals 13 and 23 denote air intake portions provided at each branch of the vertical runner 3, and reference numerals 14 and 24 are provided between the horizontal runners 12 and 22 and the cavities 11 and 21. Weirs are shown respectively.

When the molten metal is poured into the mold 1 constructed as described above from the gate 2, the molten metal flowing down the vertical runner 3 is transferred to the molten metal receiver 5 provided between the upper horizontal runner 12 and the lower horizontal runner 22. After hitting against the top surface, the flow velocity is greatly reduced here, and guided by the side surface of the heart-shaped molten metal receiver 5, the laminar flow is diverted into the right and left narrow bypass passages 6, 6, and the flow is directly performed. The air flows down to the lower vertical runner 3 without entraining the air, and further flows into the lower cavity 21 via the lower horizontal runner 22 to form an excellent product with less air entrainment.

On the other hand, the lower cavity 21
When the inside is full, the molten metal begins to flow upward through the lower vertical runner 3, but the flow of the molten metal weakens as it flows from the molten metal receiver 5 into the narrow bypass passages 6, 6. The molten metal that has flowed down the path 3 does not mix with the molten metal from the lower vertical runner 3 and is almost linearly mixed with the upper horizontal runner 12.
Flows into.

[0013]

As described above, according to the present invention, a heart-shaped molten metal receiver having substantially the same cross-sectional area as the vertical runner is provided at the center in the width direction at the middle of the vertical runner. since so as to form a narrow bypass passage sectional area of Tateyudo to, after having weakened the flow rate of its have strike the receiving molten metal melt has been flowing down the Tateyudo, the arcuate receiving heart-shaped molten metal eggplant <br/> narrow down the smooth along allowed while the bypass passage to the peripheral surface or
To allow the product to flow down in a laminar flow, greatly reducing the entrainment of air and enabling the formation of excellent products.In the case of a mold with upper and lower cavities, when the lower cavity becomes full Do not narrow the backflow of molten metal
Was suppressed by the bypass flow path section can be suppressed at the same time a mixing of the flows downward text was molten.

[Brief description of the drawings]

FIG. 1 is a side view showing a cross section of a vertical casting mold according to an embodiment of the present invention.

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

FIG. 3 is a side view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Gate 3 Vertical runner 5 Molten receiver 6 Bypass flow path 11, 21 Cavity 12, 22 Horizontal runner

Claims (1)

(57) [Scope of request for utility model registration] 1. An intermediate portion of a vertical runway communicating with an upper gate.
The width direction central portion at approximately equal to the cross-sectional area of the vertical runners, and provided with a substantially heart-shaped molten metal received in which a recess on the upper surface center of the receiving solution water so as to extend along the receiving solution water A vertical casting mold characterized by forming bypass passages on both sides that are much narrower than the cross-sectional area of the vertical runner by connecting the upper and lower vertical runners.