JPS58202965A - Cooling device for casting sprue - Google Patents

Abstract

PURPOSE:To reduce the cooling time in a sprue part and to improve the productivity of a casting, by scooping the cooling water of the volume as much as the volume of a vessel for scooping out from a water tank and spraying the cooling water to the sprue with a guide pipe for the cooling water. CONSTITUTION:When the charging of molten metal into a casting mold A is completed, a carriage placed the mold A advances by the length as much as the molding flask of the casting mold and the sprue 7a of the mold A is positioned below the output of a guide pipe C for cooling water. At the same instant when the carriage ends advancing by the length as much as one flask, a tilting cylinder 6 operates cooperatively with said end to tilt an arm flask 2 upward. The cooling water in a water tank (a) scooped by a vessel (b) for scooping is transferred to the inlet of the pipe C and the cooling water transferred therein flows in the pipe C and is sprayed through the outlet thereof to the sprue 7a of the mold A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a casting sprue, and more specifically, after pouring hot water into a mold, the thickness of the molten metal at the sprue portion becomes thick, and solidification does not occur in that portion. , relates to a cooling device that sprays a certain amount of cooling water to quickly solidify it.

Conventional cooling methods of this type include cooling by air cooling and cooling by spraying cooling water using a solenoid valve. However, since the former type of cooling has little cooling effect, the cooling process must take a long time, resulting in poor productivity of castings (products).

Another problem was that when the cooling system malfunctioned due to the latter, too much cooling water was released, increasing the moisture content of the sand used as the mold material, making it impossible to transport the sand pneumatically.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to reliably spray a certain amount of cooling water onto the molten metal at the sprue so that the molten metal quickly solidifies.

The basic structure of the present invention to achieve such an object is as follows: an arm frame having a generally A-shaped side; The base is provided with a rotatable shaft whose other end is welded and fixed, and a tilting cylinder that tilts the arm frame up and down using the rotary shaft as a fulcrum, and the arm frame tilts upward. A cooling water guiding pipe having both open ends formed in a substantially trumpet shape is provided for guiding and dispersing the cooling water in the pumping container to the sprue of the mold after pouring hot water.

An embodiment of the present invention will be described below based on the drawings. In the figure, (&) is a water tank, (1) is a ball tap water supply device installed on the upper side wall of the water tank (-)), and the water tank (&). When the water level of the cooling water in the water tank drops, it supplies cooling water to the water tank (&) to maintain a constant water level.

(b) is the water tank (a container for pumping out the cooling water in → from the upper opening <ay), which is provided at one end of the arm frame (2) to be described later.

The arm frame (2) is formed into a generally A-shaped side surface consisting of an inclined frame part (2a) and one vertical frame part (2b), and the vertical frame part (2b)
The pumping container (b) is clamped and fixed to the lower end (one end) of the container (b) with its opening surface facing upward.

In addition, the lower tip of the inclined frame portion (2a), that is, the arm frame (2)
A pumping container (b) provided at the lower end of the vertical frame (2b) is attached to the other end of the rotating shaft (4) rotatably mounted on the front end of the image via a bearing (3). is the top opening (-) of the tank (-).
Welded and fixed so that it enters the water tank (,) from ay,
The arm frame (7) is tilted up and down by the rotating wheel (4).

Further, the inclined frame portion (2a
) and - an arm piece (5) with one end welded and fixed in a straight line is provided, and the other end of this arm piece (5) is provided with a tilting cylinder ( 6) The cylinder rod @y is pivotally mounted.

In this way, the arm frame (2) is tilted up and down via the rotation shaft (4) by the operation of the tilting cylinder (6), and the cooling water in the water tank (a) is pumped out by the pumping container (b). A volume of the container (b), that is, a certain amount of cooling water necessary for solidifying the sprue is pumped out and brought into contact with the inlet of a cooling water guide pipe (C) to be described later.

The cooling water guide pipe (C) has one of its open ends facing the opening of the water tank (a) (37 from the surrounding wall to the opening of the pumping container (b) facing into the tank (-)). It is formed into a roughly trumpet shape, and the other end is positioned above the axis of the sprue (7a), bent downward, and the end is placed over the sprue (7a).
) is formed in the shape of a trumpet on the side so that cooling water is sprayed over the entire surface of the sprue (7&).

In the figure (8) is the base, and on the top surface is the water tank (&
) and a bearing (3) on which both ends of the rotation shaft (4) are rotatably supported, and a support base (on which the rear part of the tilting cylinder is rotatably supported) are installed. 9) is placed.

Next, to briefly explain the operation of the cooling device of the present invention described above, first, the operation of the tilting cylinder (6) causes the operation of the mold carriage (not shown) provided at a predetermined interval to advance one step. It is activated as soon as it ends.

That is, when the injection of hot water into the casting mold 11 (A) is completed, the trolley carrying the mold body moves forward by the length of the casting frame, so that the mold (4) is placed below the outlet of the cooling water guide pipe (C). The sprue (7 &) is located at the Then, at the same time as the cart advances by one frame, the tilting cylinder (@) is activated to tilt the arm frame (2) upward.
The cooling water in the water tank (&) pumped out by the pumping container (b) is brought into contact with the inlet of the cooling water guide pipe (C), and the contacted cooling water flows through the pipe (C). After that, it is sprayed from the outlet to the sprue (7a) of the mold (4)), and then the arm frame (
2) is tilted downward, the pumping container (b) is not in a state where the cooling water in the water tank 0 can be pumped out, and the mold (g), which has been filled with hot water, is moved forward by one frame of the trolley. Cooling water guide pipe (C
At the same time as the sprue (7a) is located below the outlet of the sprue (7a), the tilting cylinder (6) is activated again to sequentially spray a certain amount of cooling water onto the sprue (7a). Therefore, a certain amount of cooling water corresponding to the volume of the pumping container (pumping container) is reliably sprayed to the sprue (7a) to quickly solidify the hot water at the sprue (7a), and moreover, to form the mold (4). There is also no fear that the moisture content of the sand will increase.

Since the present invention is configured as described above, in the step of cooling the sprue part of the mold after pouring, cooling water with the volume of the pumping container is pumped out from the water tank and transferred to the sprue through the cooling water guide pipe. Since cooling water can be sprayed reliably, the molten metal at the sprue can be solidified quickly. Therefore, since the cooling time of the sprue part can be shortened, the productivity of castings (products) can be improved.

In addition, the cooling water is only pumped out by the volume of the pumping container when the arm frame tilts upward, so unlike the conventional method, too much cooling water is pumped out, which increases the moisture content of the sand that forms the mold. There is no fear that it will. Therefore, there is no problem with the pneumatic transportation of sand, and the operating rate of the machine can be improved.

Therefore, the casting sprue cooling device of the present invention can shorten the cooling time of the sprue portion and improve the machine operating rate, so that it is possible to provide a cooling device that can improve the productivity of castings.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a partially cutaway side view, and FIG. 2 being a partially cutaway plan view. (In the figure) - Casting base (a) - Water pumping container (C) - Cooling water guide pipe (2) - Arm frame
(3) -...Rotation axis (6) -One arm
(6) -・-Tilt cylinder-(7a)-Hot water

Claims (1)

[Claims] A water tank equipped with a pole tap water supply device at the upper part of the side wall, a side channel A-shaped arm frame provided at one end with a pumping container for pumping out the cooling water in the water tank from an opening, and the other end of this arm frame. A cylinder rod is pivotally connected via a rotation shaft fixed by welding and rotatably mounted, and an arm piece welded and fixed in line with the arm frame fixed to the rotation shaft, A tilting cylinder for tilting the arm frame is provided on the base, and the arm frame tilts upward to become a waterway that guides the cooling water in the pumping container provided at one end of the arm frame to the sprue of the mold. A cooling device for a casting sprue that is equipped with a cooling water guide pipe with both open ends formed in a substantially trumpet shape.