JP2840887B2 - Inlet structure of injection sleeve hot water inlet and hot water inlet block of horizontal die casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact structure between an injection sleeve hot water supply port and a hot water supply block of a horizontal die casting machine for supplying hot water to a mold cavity by a molten metal pressure feeding device such as an electromagnetic pump hot water supply device.

[0002]

2. Description of the Related Art As an example of a hot water supply apparatus using an electromagnetic pump of a horizontal die casting machine, Japanese Utility Model No. 2-2 by the same applicant.
There is one disclosed in Japanese Patent No. 5562.

FIG. 3 shows a schematic structure of the die casting machine 41. A horizontal die casting machine 41 has fixed and movable dies 44 and 45 mounted on fixed and movable die plates 42 and 43, respectively. The injection plunger 4 is formed in an inner hole of an injection sleeve 47 penetrating the fixed die 44 and fitted into the fixed die plate 42.
8 is moved forward and backward by an injection cylinder (not shown), and the molten metal 50 of the holding furnace 49 is supplied to the hot water supply pipe 53 heated by the electric heater 52 by the operation of the electromagnetic pump 51 and is supplied to the hot water supply port 54 of the injection sleeve 47. Hot water is supplied to the injection sleeve 47 via an adapter (hereinafter, referred to as a hot water supply block) 55 which is in contact with the molten metal 50. The molten metal 50 flows and is introduced through a hot water path communicating from the holding furnace 49 to the injection sleeve 47. The casting quality is stabilized by minimizing the hot water supply and oxidation by contact with the outside air.

[0004]

Incidentally, in a horizontal die casting machine which supplies hot water by a molten metal pressure feeding device such as an electromagnetic pump hot water supply device as described above, the structure of the portion where the hot water supply block 55 and the injection sleeve hot water supply port 54 are in contact with each other. In addition, since they are located on the outer side of the fixed die plate 42 opposite to the mold mounting surface, the injection sleeve 47 is relatively long. Therefore, the supplied molten metal 50 is injected into the injection sleeve 4.
7 occupies about 30 volumes, that is, the hot water filling rate is about 30
%, So that a large amount of air exists in the upper space 56 above the molten metal surface in the injection sleeve 47. This means that when the injection plunger 48 moves forward and the molten metal 50 is injected, a large amount of air in the upper space 56 is injected together with the molten metal 50 and is ejected when passing through the gate 57 of the mold cavity 46 and becomes molten. This is a factor of quality deterioration such as entrainment of air into the product and the formation of nests in the product. Empirically, it is necessary to increase the hot water supply filling rate to about 80% or more in order to prevent air entrapment, and it is a problem to reduce the air in the upper space 56 in the injection sleeve 47 as much as possible. Has become. Further, in order to keep the high-temperature molten metal 50 warm, the hot water supply pipe 53 and the hot water supply block 55 are heated by the electric heater 52 or the like. There is a problem that the heat retention in the vicinity is not sufficient and solidification and adhesion of the molten metal 50 due to a decrease in temperature and clogging of the hot water supply port 54 occur. Further, the hot water supply block 55 may be detached and attached, and work is performed in a place where working conditions are poor, so that workability is a problem.

An object of the present invention made in view of the above is to improve the filling rate of hot water supply by making the injection sleeve as short as possible in a horizontal die casting machine equipped with a molten metal pumping device such as an electromagnetic pump hot water supply device. In addition, the structure of the hot water supply port block that is in contact with the injection sleeve hot water supply port is reduced in size, the hot water supply port is provided within the thickness of the fixed die plate, the temperature near the hot water supply port is maintained at a high temperature, and the hot water supply port block is detached. It is an object of the present invention to provide a contact structure between an injection sleeve hot water supply port and a hot water supply port block of a horizontal die casting machine which solves the originally required problems such as easy work.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to an injection sleeve hot water supply port and a hot water supply port in contact with the injection sleeve hot water supply port of a horizontal die casting machine for supplying hot water by a molten metal pressure feeding device such as an electromagnetic pump hot water supply device. In the contact structure with the block, one end is opened to the gate of the mold cavity, and the injection sleeve has a hot water supply opening provided at the other end opened within the thickness of the fixed die plate to which the fixed mold is attached, An insulating groove formed concentrically with the hot water supply port outside the hot water supply port, and a concave portion formed between the heat insulating groove and the hot water supply port at a right angle to the hot water supply port from an outer peripheral surface of the injection sleeve. An annular seat, and a hot water supply block having one end that is pressed into contact with the annular seat with a packing interposed therebetween and communicates with the hot water supply port, and the other end has a passage that communicates with a hot water supply pipe that leads out the molten metal in the molten metal warming furnace. Hot water supply A case in which the block is integrally provided via a heat insulating member, a guide shaft detachably attached to a centering hole of the case and centering the hot water supply port of the hot water supply block; The central stepped shaft portion was fitted into the provided groove, was mounted so as to be able to rotate only around the axis, and penetrated the guide shaft at a right angle, and right and left screws were threaded from both ends toward the center. An adjusting shaft and an inclined surface which is attached to the inner surface of the notch portion of the fixed die plate and which has a middle and high portion parallel to the adjusting shaft is provided on a surface opposite to the attaching surface and opposite to the case. A receiving base provided with a hole for guiding the guide shaft in the mounting / removing direction with respect to the case at the middle and high portion, and the adjusting shaft having one end surface slidingly contacting the case and the other end surface being in contact with both inclined surfaces of the receiving base. Screw on the right and left screws of A wedge block which moves in the adjustment axis direction by rotation, performs a wedge action, adjusts a distance between the case and the receiving stand, and detaches the hot water supply block from the hot water supply port. The horizontal die casting machine has an injection sleeve hot water inlet and a hot water inlet block.

In this case, an electric heating ring is inserted into the heat insulating groove, and the outer diameter of the packing pressed between the annular seat of the hot water supply port and the hot water supply port block is changed to the outer diameter of the heat insulating groove. It is preferable that the packing can be fitted into a concave portion in which the annular seat is formed.

[0008]

[Function] The hot water supply block integrated inside the case is
The adjustment shaft which is inserted into the groove of the guide shaft which is inserted into the centering hole of the case is rotated, and the wedge block screwed to the adjustment shaft is slidably brought into contact with the surface of the case to adjust the movement thereof. The packing structure is inserted into the annular seat and the contacting structure is pressed and seated.The position of the hot water supply is within the thickness of the fixed die plate, so the injection sleeve becomes shorter and the filling rate of hot water is increased. .

Further, the temperature near the hot water supply port is maintained at a high temperature by the electric heating ring inserted in the heat insulating groove formed concentrically in the hot water supply port.

When the hot water supply block is attached or detached, the wedge block screwed to the adjustment shaft by rotating the adjustment shaft as described above is brought into sliding contact with the surface of the case, so that the case can be moved.
The guide shaft can be attached and detached from the centering hole of the case and can be moved laterally, and the packing sandwiched between the annular seat of the hot water supply port and the hot water supply port block is aligned with the outer circumference of the heat insulating groove and is located in the concave part where the annular seat is formed. Since it is fitted, the attachment / detachment work can be easily performed.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 denotes an injection sleeve.
A fixed die 13 attached to the fixed die plate 12 is fitted, one end is opened to a gate of a mold cavity (not shown), and the other end of the molten metal supply section for supplying molten metal has a thickness of the fixed die plate 12. It is configured to be within T. Reference numeral 14 denotes an injection plunger, which is connected to an injection cylinder (not shown) and is fitted into the injection sleeve 10 so as to be able to advance and retreat. The molten metal supplied is extruded and cast into a mold cavity (not shown).

Reference numeral 15 denotes a hot water supply pipe, which communicates with an electromagnetic pump hot water supply device (not shown) to feed the molten metal under pressure from a molten metal warming furnace. Hot water supply pipe 1
The outer periphery of 5 is heated by winding an electric heater or the like. The hot water supply device is not limited to the electromagnetic pump hot water supply device, but is also applicable to a pneumatic pressure hot water supply device or a vacuum hot water supply device.

Reference numeral 16 denotes an injection sleeve water supply port formed in the injection sleeve 10, and reference numeral 17 denotes an annular heat insulating groove formed concentrically outside the injection sleeve water supply port 16. Insulation groove 17
The thickness t between the bottom of the injection sleeve 10 and the inner peripheral surface of the injection sleeve 10 is made as small as possible in view of the strength of the injection sleeve 10, the cross-sectional area relating to heat conduction is reduced, and the temperature of the hot sleeve 16 from the hot water supply port 16 is lowered. Heat conduction to the side 10 is reduced to prevent solidification and adhesion of the molten metal due to a decrease in the temperature of the hot water supply port 16 and clogging of the hot water supply port 16.

An annular seat 18 is formed between the hot water supply port 16 and the outer heat-insulating groove 17 at a right angle to the hot water supply port 16 from the outer peripheral surface of the injection sleeve 10 to form a concave portion. h is formed so as to maintain the strength by forming an annular portion of the annular seat 1 by pressing the hot water supply block 19.
8 can be prevented from being deformed or damaged.

The hot water supply block 19 is formed of a molten metal material having a resistance to molten metal, and has an L-shaped passage 20 penetrating therethrough. One end is opened at an end face of a tapered portion 21 which presses the hot water supply port 16 and the other end is opened. It is connected to the hot water supply pipe 15. The hot water supply block 19 is joined to the hot water supply port 16 by pressing and seating the end surface of the tapered portion 21 on the annular seat 18 with the packing 22 interposed therebetween.

The packing 22 has an outer diameter of the heat insulating groove 17.
Of the hot water supply block 19
When it is pressed and seated on the annular seat 18 of the hot water supply port 16, it does not shift or fall off.

Reference numeral 23 denotes a case made of heat-resistant steel such as stainless steel, and the hot water supply block 19 is integrally provided inside through a heat insulating means such as a heat insulating plate 24.

Reference numeral 25 denotes a guide shaft. The protrusion 26 at the upper end is removably fitted into the centering hole 36 of the case 23 and has a centering function for the hot water supply port 16 of the hot water supply block 19. A groove 27 is formed in a cross shape.

Reference numeral 28 denotes an adjusting shaft which is inserted into the groove 27 so that the center stepped shaft portion 29 can rotate only about the axis, and penetrates the guide shaft 25 in a right angle direction. Both sides are threaded with right and left screws, and are pivotally supported by the receiving base 33.

Reference numeral 30 denotes a pair of wedge blocks which are screwed into right and left screws on both sides of the adjusting shaft 28, respectively.
The surface 31 on one side is in sliding contact with the surface of the case 23, and the other side is an inclined surface 32.
Is in sliding contact with

The pedestal 33 is attached to the inner surface of a notch 37 formed in the fixed die plate 12, and has a middle and high portion parallel to the adjustment shaft 28, and the inclined surfaces 34 are provided on both sides.
And a hole 38 for guiding the guide shaft 25 is provided in the middle and high section.

Accordingly, when the adjusting shaft 28 is rotated, the wedge block 30 is rotated by the right and left screws which are screwed together.
8 and the inclined surfaces 32 and 34 and the surface 3
The case 23 can be slid between the surfaces of the case 1 and the case 23 to move and adjust the case 23 with respect to the fixed receiving base 33, and the hot water supply block 19 can be pressed and seated on the annular seat 18 of the hot water supply port 16. .

FIG. 2 shows another embodiment of the injection sleeve hot water supply port 16 of the embodiment described in FIG.
An electric heat ring 35 is inserted into the annular heat insulating groove 17 and is wound and connected to a power supply (not shown). The structure is such that electric heating is performed to maintain the temperature of the hot water supply port 16 at a high temperature. Solidification and adhesion of molten metal by hot water 1
The function of preventing the clogging of No. 6 is improved.

In this way, the hot water supply block 19 is held by the holder 33 attached to the inner surface of the notch provided with the fixed die plate
The hot water supply port 16 can be brought as close as possible to the fixed mold 13 to shorten the injection sleeve 10 and increase the hot water supply filling rate.

When attaching / detaching the hot water supply port block 19, the adjustment shaft 28 is rotated as described above, and the wedge block 30 screwed to both sides with right and left screws is fitted to the inclined surface 34 of the receiving base 33 and the case 23. Of the guide shaft 25 guided in the hole 38 of the receiving base 33 by moving and adjusting the case 23 with respect to the fixed receiving base 33 attached to the fixed die plate 12 by sliding and moving between the surfaces. The protrusion 26 at the upper end is attached to and detached from the centering hole 36 of the case 23, and the hot water supply block 1
9 can be performed by laterally moving the entire case 23.

Further, the outer diameter of the packing 22 sandwiched between the annular seat 18 of the injection sleeve hot water inlet 16 and the hot water inlet block 19 is matched with the outer diameter D of the heat insulating groove 17, and the height h of the annular seat 18 is insulated. The recess is formed to be lower than the height H of the outer peripheral wall of the groove 17 so that the packing 22 can be fitted therein, and the packing 22 can be prevented from being displaced and dropped when the hot water supply block 19 is attached and detached, thereby improving workability. doing.

[0028]

As described above, according to the present invention, in a horizontal die casting machine for supplying hot water by a molten metal feeding device such as an electromagnetic pump hot water supply device, the structure of a hot water supply port block which is in contact with an injection sleeve hot water supply port is reduced in size and fixed. Insert into the thickness of the die plate and bring the hot water supply port closer to the fixed mold to shorten the injection sleeve, reduce the space volume above the melt surface when the melt is fed into the injection sleeve, and reduce the air volume. Since it is possible to reduce the amount of hot water supply and increase the filling rate of hot water, it is possible to remarkably reduce the entrainment and mixing of air when the molten metal is injected, and to prevent the quality of products from lowering.

Further, since an electric heating ring is inserted into the heat insulating groove provided in the hot water supply port to heat the hot water supply port, solidification and adhesion of the molten metal due to a temperature drop and clogging of the hot water supply port can be prevented.

Further, the hot water supply block integrally provided in the case can be moved by sliding the wedge block screwed by rotating the adjusting shaft between the case and the cradle, and can also move the injection sleeve hot water supply port. The seal structure is such that packing with the same diameter as the annular seat is inserted into the recess formed in the annular seat provided in the above, and is pressed and seated, so that the work of attaching and detaching the hot water supply block can be easily performed. is there.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing another embodiment relating to an injection sleeve hot water supply port.

FIG. 3 is a cross-sectional view showing a schematic structure of a conventional electromagnetic pump water heater of a horizontal die casting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Injection sleeve 12 Fixed die plate 16 Injection sleeve hot water supply port 17 Insulated groove 18 Annular seat 19 Hot water supply port block 22 Packing 23 Case 25 Guide shaft 28 Adjusting shaft 30 Wedge block 33 Cradle 35 Electric heating ring

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B22D 17/30 B22D 17/10 B22D 17/20 B22D 37/00

Claims (3)

(57) [Claims] In a contact structure of an injection sleeve hot water supply port of a horizontal die casting machine for supplying hot water by a molten metal pressure feeding device such as an electromagnetic pump hot water supply device and a hot water supply block, one end is opened to a gate of a mold cavity, An injection sleeve in which a hot water supply port provided at the other end is open within the thickness of a fixed die plate to which a fixed mold is attached, and an insulating groove formed concentrically with the hot water supply port outside the hot water supply port. An annular seat formed between the heat insulating groove and the hot water supply port at right angles to the hot water supply port from an outer peripheral surface of the injection sleeve to form a concave portion; A hot water supply block having a passage communicating with the port and having the other end communicating with a hot water supply pipe for drawing out the molten metal in the molten metal warming furnace; a case in which the hot water supply block is integrally provided via a heat insulating member; K A guide shaft which is removably mounted in a centering hole of the screw hole and which performs centering of the hot water supply block with respect to the hot water supply port; It is mounted so as to be capable of rotating operation only, and the right and left screws are respectively threaded from both ends toward the center through the guide shaft at right angles, and the adjustment shaft is mounted on the inner surface of the cutout portion of the fixed die plate. An inclined surface having a middle and a high portion parallel to the adjustment shaft is provided on both sides on a surface opposite to the mounting surface and facing the case, and the guide shaft is guided to the middle and high portion in a mounting / removing direction with the case. A receiving base provided with a hole to be formed, one end face slidingly contacting the case and the other end face sliding on both inclined surfaces of the receiving base, and being screwed into right and left screws of the adjusting shaft, and rotating the adjusting shaft to adjust the adjusting shaft. To move in the direction of the wedge, Segguchi structure of the injection sleeve hot water inlet and hot water outlet blocks of the lateral die casting machine, characterized in that it consists of a wedge block for distance to adjust the detachable to the hot water outlet of the hot water supply port block between the cradle. 2. The contact structure between an injection sleeve hot water supply port and a hot water supply port block according to claim 1, wherein an electric heating ring is inserted into said heat insulating groove. 3. An outer diameter of the packing, which is pressed and held between an annular seat of a hot water inlet and a hot water inlet block, is adjusted to an outer diameter of the heat insulating groove, and the packing is inserted into a concave portion in which the annular seat is formed. 3. The contact structure between an injection sleeve hot water supply port and a hot water supply port block according to claim 1, wherein the hot water supply port and the injection sleeve water supply port can be fitted.