JP3369013B2 - Hot water supply equipment in die casting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to die casting, and in particular, a molten metal is fed into a cavity formed by a fixed die and a movable die through a molten metal feed pipe which is connected to a molten metal holding furnace, and after that, The present invention relates to a hot water supply device used for die casting in which the molten metal in the cavity is pressed by a pressurizing element, and more particularly to a connection structure of a molten metal supply pipe that connects a mold cavity and a molten metal holding furnace. For a specific example of the die casting apparatus related to the present invention, see the specification and drawings of Japanese Patent Application No. 6-217341.

[0002]

2. Description of the Related Art In a conventional hot water supply apparatus of this type, when a molten metal supply pipe is erected and connected between a molten metal holding furnace (the inlet of the molten metal) and a die casting machine (the inlet of the mold cavity), It is installed so that it can move back and forth, and a driving cylinder is connected to the molten metal holding furnace, and the connection of both ends of the molten metal supply pipe is performed by the function of the driving cylinder so that the molten metal holding furnace The structure is such that it is tightly connected to the passageway and at the same time absorbs changes in thermal expansion of the molten metal supply pipe to prevent unreasonable force from being applied to the molten metal supply pipe.

However, in reality, since the molten metal holding furnace is heavy and the movement resistance is large, the molten metal holding furnace cannot move smoothly when there is a change in the thermal expansion of the molten metal supply pipe, and eventually the molten metal supply pipe is impossible. It could be damaged by the application of excessive force.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and the force of the driving cylinder for moving the molten metal holding furnace back and forth toward the die casting machine is applied to the molten metal supply pipe. It is intended to provide a hot water supply device in die casting, which is not likely to be damaged by the change in the thermal expansion of the molten metal supply pipe without being directly added.

[0005]

A hot water supply apparatus for die casting according to claim 1 of the present invention which achieves the above object supplies a molten metal into a mold cavity through a molten metal supply pipe connected to a molten metal holding furnace. In a hot water supply device for die casting in which filling is performed, a bracket is arranged from the molten metal holding furnace toward the die casting machine, and a pipe connection port for connecting the molten metal supply pipe to the bracket and a runner port of a mold cavity. A hot water supply connection block formed with a mold connection port to be connected is mounted via a mounting stay so as to be swingable in the front-rear direction, and a mounting shaft connecting the hot water supply connection block and the mounting stay and the mold. It is characterized in that the connection port and the connection port are arranged on substantially the same horizontal line. Further, in the hot water supply apparatus for die casting according to claim 2 of the present invention, the hot water supply connection block is biased to the mounting stay side by a tension spring, and the molten metal supply pipe is connected to the pipe connection port of the hot water supply connection block and the pipe connection port. It is characterized in that it is elastically supported in a sandwiched manner between the molten metal holding furnace and the hot water supply port. Further, in the hot water supply apparatus for die casting according to claim 3 of the present invention, the hot water supply connection block is attached to the attachment stay so as to be vertically and horizontally movable, and the hot water supply connection block and the die casting machine side are engaged with each other. It is characterized in that a concave-convex guide for positioning is formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, A is a die casting machine, B is a molten metal holding furnace for holding a required amount of molten metal (molten metal) to be supplied to the die casting machine A, and C is a die casting machine A for holding the molten metal in the molten metal holding furnace B. Fixed type 1a installed in
And a movable mold 1b, which is a molten metal supply pipe for supplying into the mold cavity 2.

The molten metal holding furnace B is provided with wheels 3 at its lower portion so as to be movable on a rail 4, and if it can be moved back and forth toward the die casting machine A by a driving cylinder 5 fixed to the rail 4 side. The hot water supply opening 6 is formed in the side wall. A bracket 8 for mounting and supporting a hot water supply connection block D, which will be described later, is horizontally provided on the outer surface of the side wall 7 having the hot water supply port 6 so as to project toward the die casting machine A.

The molten metal supply pipe C is formed into a hollow tubular shape having a desired length and diameter by using, for example, a ceramic material having excellent heat resistance as in the conventional case, and has a heat insulating material such as glass wool or a heating material on the outer periphery. A heat insulation tube 9 equipped with a heater 9a is arranged in a concentric manner by loose fitting. One end opening 10a is connected to the hot water supply port 6 of the molten metal holding furnace B, and the other end opening 10b is connected to the hot water supply connection block D by pipe connection. Mouth 11
Connect to.

The hot water supply connection block D includes a mold cavity 2
It is for connecting and connecting the runner hole 12 of the runway 12a and the molten metal supply pipe C, which is formed in a substantially vertically long rectangular parallelepiped shape, and is provided with a heat insulating heat insulating material or a heater 13 for heating on the outer periphery thereof. A pipe connection port 11 is formed on the side facing the molten metal supply pipe C, and a mold connection port 14 is formed on the side of the mold cavity facing the runner port 12, and these pipe connection port 11 and mold connection port 14 are formed. And melt passage 1
It connects with 5.

Then, the hot water supply connection block D is swingably installed on the bracket 8 through a mounting stay 16 in the front-back direction, that is, in the same direction as the advancing and retracting movement direction of the molten metal holding furnace B. That is, the mounting stay 16 is fixedly installed at the upper surface position on the tip side of the bracket 8 (close to the die casting machine A), while the support arms 17 formed in a substantially U-shape in plan are provided on both upper sides of the hot water supply connection block D. A bolt-like support shaft 18 is used for fastening and detaching attachment, and a connecting portion 17a of its supporting arm 17 is attached to an attaching portion 16b projecting from the upper portion of the attaching stay 16 so as to be swingable in the front-rear direction with an attaching shaft 30. It is connected and supported.

At this time, a long hole 19 which is long in the vertical direction is formed in the support arm 17 so that the hot water supply connection block D can be moved in the vertical direction and the horizontal direction with respect to the mounting stay 16. The support shaft 18 is loosely inserted thereinto, and a small gap 20 is provided between the support arm 17 and the left and right side surfaces of the hot water supply connection block D.

Further, connecting flanges 21 are provided on the lower left and right sides of the hot water supply connection block D so as to project therefrom.
1 and the flange 16a of the mounting stay 16, the connecting rod 22 is erected in a loose insertion manner, and the tension spring 23 is linked between the flange 16a of the mounting stay 16 and the stopper 22a of the connecting rod 22 to connect the hot water supply connection block D. Is urged toward the mounting stay 16. As a result, the molten metal supply pipe C is elastically sandwiched and supported between the pipe connection port 11 of the hot water supply connection block D and the molten metal supply port 6 of the molten metal holding furnace B.

It should be noted that the one end opening 10a of the molten metal supply pipe C and the hot water supply port 6 of the molten metal holding furnace B are connected, and the other end opening 10b of the molten metal supply pipe C and the pipe connection port 11 of the hot water supply connection block D are connected. The connection and the connection between the mold connection port 14 of the hot water supply connection block D and the runner port 12 of the mold cavity are made into a spherical seat connection structure as in the illustrated embodiment.

Further, a gap 31 is provided between the hot water supply connection block D and the die casting machine A side to ensure that the hot water supply connection block D swings in the front-rear direction due to the thermal expansion of the molten metal supply pipe C. At the same time, the positioning concave-convex guides 24 (24a, 24b) that engage with each other are formed so that the mold connection port 14 of the hot water supply connection block D can be connected to the runner port 12 of the mold cavity easily and accurately.

That is, in the case of the illustrated embodiment, two positioning engaging projections 24a are integrally provided at the center of the hot water supply connection block D, and the die casting machine A side, that is, the runner hole 12 of the mold cavity is provided. The auxiliary fixing die 25 thus formed is provided with two positioning engaging recesses 24b corresponding to the two engaging projections 24a.

In use, the molten metal supply pipe C is loosely fitted and inserted into the heat insulation pipe 9 placed on the bracket 8 of the molten metal holding furnace B, and the one end opening 10 of the molten metal supply pipe C is inserted.
While connecting a to the hot water inlet 6 of the molten metal holding furnace B,
The other end opening 10b of the molten metal supply pipe C is connected to the pipe connection port 11 of the hot water supply connection block D. Then, the molten metal supply pipe C is elastically sandwiched and supported between the molten metal supply connection block D and the molten metal holding furnace B by the urging action of the tension spring 23. In that state, the driving cylinder 5 is operated to move the molten metal holding furnace B along the rail 4 to the die casting machine A.
Move forward.

Then, the hot water supply connection block D and the positioning concave-convex guide 24 (the positioning engagement projection 24a and the positioning engagement recess 24b) formed on the die casting machine A side (auxiliary fixed die 25) are engaged with each other. , The position of the hot water supply connection block D (the mold connection port 14 of the mold cavity) with respect to the die casting machine A (the mold cavity 12 of the mold cavity) is regulated, and then the mold connection port 14 of the hot water supply connection block D is set to the mold cavity. It is press-connected to the runner spout 12.

After that, the support shaft 18 is tightened to fix the hot water supply connection block D to the support arm 17 so that the hot water supply connection block D swings back and forth about the mounting shaft 30.

[0019]

According to the hot water supply apparatus for die casting according to the first aspect of the present invention, the hot water supply connection block is supported by the bracket arranged in the molten metal holding furnace so as to be swingable in the front-back direction through the mounting stay. Since the mounting shaft connecting the hot water supply connection block and the mounting stay and the mold connection port of the hot water supply connection block are arranged on substantially the same horizontal line, it is possible to move the molten metal holding furnace back and forth toward the die casting machine. If the force of the driving cylinder is not directly applied to the molten metal supply pipe, and at the same time there is a change in the thermal expansion of the molten metal supply pipe, the hot water supply connection block will swing back and forth around the mounting shaft. . As a result, the change in thermal expansion of the molten metal supply pipe is absorbed by the portion of the molten metal supply connection block, so even if an overload is applied to the molten metal supply pipe due to the thermal expansion change of the molten metal supply pipe, the molten metal supply pipe may be damaged. It disappears.

Further, according to the hot water supply apparatus for die casting according to the second aspect of the present invention, the molten metal supply pipe is elastically sandwiched and supported by the pipe connection port of the hot water supply connection block and the hot water supply port of the molten metal holding furnace. As a result, there is no fear that the molten metal supply pipe will accidentally drop off, and there is no fear that molten metal will leak at both ends of the molten metal supply pipe due to changes in the thermal expansion of the molten metal supply pipe.

According to the hot water supply apparatus for die casting according to the third aspect of the present invention, the hot water supply connection block is mounted on the mounting stay so as to be vertically and horizontally movable, and the hot water supply connection block and the die casting machine side are engaged with each other. Since the positioning concave-convex guide that fits is formed,
When connecting the mold connection port of the hot water supply connection block to the runway port of the die cavity of the die casting machine, the relative position of the mold connection port of the hot water supply connection block and the runway port of the die cavity of the die casting machine may be slightly misaligned. However, it is possible to make a simple and accurate communication connection.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of implementing the present invention.

FIG. 2 is a partially cutaway front view showing a main part.

FIG. 3 is a sectional view showing a main part.

FIG. 4 is an enlarged cross-sectional view taken along the line (X)-(X) of FIG.

5 is an enlarged cross-sectional view taken along line (Y)-(Y) of FIG.

[Explanation of symbols]

A: Die casting machine B: Molten metal holding furnace C: Molten metal supply pipe D: Hot water supply connection block 1a: Fixed mold 1b: Movable mold 2: Mold cavity 3: Wheels 4: Rail 5: Driving cylinder 6: Hot water supply port 8: Bracket 11: Pipe connection port 12: Runway port 14: Mold connection port 15: Molten metal conduit 16: Mounting stay 16a: Flange 16b: Mounting part 17: Support arm 17a: Connecting part 18: Spindle 19: Oblong hole 20: Gap 21: Connection Flange 22: Connection Rod 23: Tension Spring 24: Positioning Concavo-convex Guide 24a: Positioning Engagement Protrusion 24b: Positioning Engagement Recess 30: Mounting Shaft 31: Gap

Claims (3)

(57) [Claims] 1. In a hot water supply apparatus for die casting, wherein a molten metal is supplied and filled in a mold cavity through a molten metal supply pipe connected to a molten metal holding furnace, a bracket is provided from the molten metal holding furnace toward a die casting machine. A hot water supply connection block formed by arranging a pipe connection port for connecting the molten metal supply pipe to the bracket and a mold connection port connected to a runner port of a mold cavity is rocked in the front-back direction through a mounting stay. A hot water supply apparatus in die casting, wherein the hot water supply connection block is freely attached, and a mounting shaft connecting the hot water supply connection block and the mounting stay and the mold connection port are arranged on substantially the same horizontal line. 2. The hot water supply connection block is urged toward the mounting stay by a tension spring to elastically move the molten metal supply pipe between the pipe connection port of the hot water supply connection block and the hot water supply port of the molten metal holding furnace. The hot water supply device in die casting according to claim 1, wherein the hot water supply device is supported by the pin in a sandwiched manner. 3. The hot water supply connection block is attached to the attachment stay so as to be movable in the vertical and horizontal directions, and the hot water supply connection block and the die casting machine side are formed with positioning concave-convex guides which engage with each other. The hot water supply device in die casting according to claim 1.