JP5575207B2 - Chill vent - Google Patents

Description

  In the present invention, in die casting, when the molten metal is filled, the gas remaining in the cavity of the mold is discharged through the gas vent passage, and the molten metal that has flowed into the gas vent passage after gas discharge is cooled and solidified in the gas vent passage. The present invention relates to a chill vent that prevents the molten metal from being ejected.

  In die casting, when the molten metal is filled, the gas remaining in the cavity of the mold is discharged through the gas vent passage, and after the gas is discharged, the molten metal that has flowed into the gas vent passage is cooled and solidified in the gas vent passage. As chill vent which prevents ejection, what was indicated by patent documents 1 and patent documents 2, for example is known.

JP 2012-157894 A JP 2011-212663 A

  However, in the inventions disclosed in Patent Documents 1 and 2, a gap at the height of the gas vent passage, that is, a gap in a direction orthogonal to the width direction of the gas vent passage, in other words, a fixed chill that forms the gas vent passage. The gap (distance) between the block mating surface (front: surface) and the mold mating surface (front: surface) of the movable chill block that forms a gas vent passage opposite to the block mating surface should be only about 0.6 mm. I could not. Therefore, the chill vents disclosed in Patent Documents 1 and 2 have a problem in that the gas remaining in the cavity does not escape easily and casting quality is deteriorated.

  In the inventions disclosed in Patent Documents 1 and 2, the ability to cool the fixed chill vent and the movable chill vent is low, and the molten metal that has flowed into the gas vent passage after the gas is discharged is not cooled and solidified completely. There is a risk that the molten metal will erupt.

  Furthermore, in the invention disclosed in Patent Documents 1 and 2, when a crack or a crack penetrating in the thickness direction occurs in the fixed chill block and / or the movable chill block that contacts the molten metal in the gas vent passage, the fixed chill block is fixed. There is also a problem that a cooling medium such as water flowing inside the chill block and / or the movable chill block leaks to the outside of the fixed chill block and / or the movable chill block and die casting becomes impossible.

  The present invention has been made in view of the above circumstances, has excellent cooling efficiency, can instantaneously solidify the molten metal that has flowed into the degassing passage, and can quickly discharge the gas that has flowed into the degassing passage. An object of the present invention is to provide a chill vent that can improve casting quality.

The present invention employs the following means in order to solve the above problems.
The chill vent according to the present invention is a fixed chill block that is attached to a fixed mold, a movable chill block that is attached to a movable mold and moves forward and backward with respect to the fixed mold and the fixed chill block together with the movable mold, A degassing passage communicating with a cavity formed between the fixed mold and the movable mold between the mold fitting surface of the fixed chill block and the mold fitting surface of the movable chill block. In the chill vent to be formed, the fixed-side fitting portion provided on the mold-matching surface of the fixed chill block has a fitting convex portion of the movable-side fitting portion provided on the die-matching surface of the movable chill block. A fitting recess that receives the fitting recess, and a fitting protrusion that fits into the fitting recess of the movable side fitting portion, and the movable side fitting portion provided on the mold fitting surface of the movable chill block includes the fixed chill block. A fitting concave portion that receives the fitting convex portion of the fixed side fitting portion provided on the mold fitting surface, and a fitting convex portion that fits into the fitting concave portion of the fixed side fitting portion. The fitting convex portion and the fitting concave portion of the movable side fitting portion, and the fitting convex portion and the fitting concave portion of the fixed side fitting portion are each formed in a step shape.

According to the chill vent according to the present invention, a step-like gas vent passage is formed between the mold matching surface of the fixed chill block and the mold matching surface of the movable chill block. That is, the gas and the molten metal guided from the cavity meander finely when passing through the gas vent passage formed between the mold-matching surface of the fixed chill block and the mold-matching surface of the movable chill block. Is reduced (consumed) faster than the conventional one.
As a result, the gap between the mold-matching surface of the fixed chill block and the mold-matching surface of the movable chill block, that is, the distance in the depth direction of the gas vent passage, in other words, the cross-sectional area of the gas vent passage is larger than the conventional one. Can also be expanded (enlarged), the escape of gas remaining in the cavity can be improved, and the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified can be shortened. At the same time, replacement of the molten metal and gas can be facilitated.
In addition, since the molten metal that has flowed into the gas vent passage is cooled and solidifies completely, it is possible to prevent the melt from being ejected from the gas vent passage and to ensure safety during operation. Can do.

In the chill vent, each of the fitting convex portion and the fitting concave portion of the movable side fitting portion, and each of the fitting convex portion and the fitting concave portion of the fixed side fitting portion are each composed of at least two slopes and adjacent slopes. At least one connecting surface to be connected, one inclined surface forming a fitting convex portion of the movable side fitting portion, and formed so as to face the inclined surface, the fixed side fitting portion The fixed-side fitting is formed so as to be opposed to the inclined surface that forms the fitting concave portion of the movable side fitting portion and the other inclined surface that forms the fitting convex portion of the movable-side fitting portion. The slope and the connection surface are formed such that a gap between the other slope that forms the fitting recess of the part and a depth that is a distance between adjacent slopes connected by the connection surface are equal. The fitting convex part of the movable side fitting part and the fitting The portions are alternately provided so as to form a line in the extending direction of the gas vent passage, and a movable portion having a bottom portion at the tip portion inside each fitting convex portion of the movable side fitting portion. A side cooling medium passage is provided, and the movable side cooling medium inflow passage for guiding the cooling medium supplied to the movable side cooling medium passage has a bottom portion on the cavity side along the extending direction of the gas vent passage. Each of the movable-side cooling medium passages is sequentially connected to an intermediate position of the movable-side cooling medium inflow path via a movable-side cooling medium supply pipe, and the fitting of the fixed-side fitting portion The convex portions and the fitting concave portions are alternately provided so as to form a line in the extending direction of the gas vent passage, and a tip portion is provided inside each fitting convex portion of the fixed-side fitting portion. A fixed-side cooling medium passage having a bottom at A fixed-side cooling medium inflow passage for guiding the cooling medium supplied to the constant-side cooling medium passage is provided so as to have a bottom portion on the cavity side along the extending direction of the degassing passage. More preferably, each of the passages is sequentially connected to an intermediate position of the fixed-side cooling medium inflow path via a fixed-side cooling medium supply pipe .

According to such a chill vent, the gas vent passage formed between the slope that forms the fitting convex part of the movable side fitting part and the slope that forms the fitting concave part of the fixed side fitting part has passed. The gas and the molten metal collide with the connection surface forming the fitting convex portion of the movable side fitting portion or the connecting surface forming the fitting concave portion of the fixed side fitting portion. The fluid energy is reduced (consumed).
As a result, the gap between the mold-matching surface of the fixed chill block and the mold-matching surface of the movable chill block, that is, the distance in the depth direction of the gas vent passage can be further increased (increased), and the gas remaining in the cavity The escape time can be further improved, the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified can be further shortened, and the replacement of the molten metal with gas is further facilitated. Can be.

  In the chill vent, a plurality of bottomed holes having a bottom at the tip, and a coolant passage accommodated in close contact with the inside of the bottomed hole and having a bottom at the tip It is more preferable that a plurality of inner cylinders made of metal that form a metal are provided inside the movable chill block and inside the fixed chill block.

According to such a chill vent, a plurality of flow paths for circulating a cooling medium such as water are provided inside (inside) the fixed chill block and the movable chill block. Thus, the fixed chill block and the movable chill block are sufficiently cooled. As a result, it is possible to further reduce the cooling time until the molten metal that has flowed into the gas vent passage is cooled and completely solidified, and further facilitate replacement of the molten metal with the gas.
Further, according to such a chill vent, since the inner cylinder made of metal is accommodated in the inside (inside) of the bottomed hole, the thickness of the fixed chill block and / or the movable chill block is increased. Even when cracks or cracks penetrating in the direction occur, a cooling medium such as water flowing inside (inside) the fixed chill block and / or movable chill block is outside the fixed chill block and / or movable chill block. Leakage can be prevented.

  In the chill vent, it is more preferable that the metal is stainless steel.

  According to such a chill vent, rust generated on the inner surface of the inner cylinder, and chalk and scale attached to the inner surface of the inner cylinder are suppressed. As a result, the cooling efficiency of the chill vent can be maintained over a long period of time, and the reliability of the chill vent can be improved.

  In the chill vent, it is more preferable that the plurality of bottomed holes are provided so that the tip portions thereof are located inside the fitting convex portions.

  According to such a chill vent, the fixed chill block and the movable chill block are cooled most efficiently, so that the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified is further shortened. In addition, the replacement of the molten metal with the gas can be further facilitated.

  The casting mold according to the present invention includes any one of the above chill vents.

  According to the casting mold according to the present invention, it is possible to shorten the cooling time until the molten metal that has flowed into the gas vent passage is cooled and completely solidified, thereby facilitating replacement of the molten metal with gas. And a chill vent that can prevent the molten metal from being ejected from the gas vent passage, so that the production performance and reliability, and the safety during work can be improved. it can.

  According to the chill vent according to the present invention, the cooling efficiency is excellent, the molten metal that has flowed into the degassing passage can be instantly solidified, and the gas that has flowed into the degassing passage can be quickly discharged. There is an effect that improvement can be achieved.

It is a figure showing the composition of the outline of the die-casting die provided with the chill vent concerning one embodiment of the present invention. It is a front view of the movable chill block concerning one embodiment of the present invention. It is sectional drawing which looked at the movable chill block which concerns on one Embodiment of this invention along the III-III arrow line of FIG. It is sectional drawing which looked at the movable chill block which concerns on one Embodiment of this invention along the IV-IV arrow line of FIG. (A) is sectional drawing which looked at the movable chill block which concerns on one Embodiment of this invention along the VV arrow line of FIG. 4, (b) is the back side of the movable chill block of the in hexagon screw shown in FIG. It is the figure seen from. It is sectional drawing which looked at the movable chill block which concerns on one Embodiment of this invention along the VI-VI arrow line of FIG. It is a front view of the fixed chill block concerning one embodiment of the present invention. It is sectional drawing which looked at the fixed chill block which concerns on one Embodiment of this invention along the VIII-VIII arrow line of FIG. It is sectional drawing which looked at the fixed chill block which concerns on one Embodiment of this invention along the IX-IX arrow line of FIG. It is a figure which expands and shows the principal part of the movable side fitting part which concerns on one Embodiment of this invention, and a fixed side fitting part.

Hereinafter, a chill vent according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.
The chill vent according to the present embodiment is applied to, for example, a die-casting die (casting die) 1 that performs high-pressure casting as shown in FIG.
1, reference numeral 2 is a fixed mold, reference numeral 3 is a movable mold, reference numeral 4 is a fixed platen, reference numeral 5 is a movable platen, reference numeral 6 is a fixed mold cavity, reference numeral 7 is a movable mold cavity, reference numeral 8 Is a cavity, symbol 9 is a sprue runner, symbol 10 is a stamp, symbol 11 is a molten metal supply part, symbol 12 is a molten metal supply port, symbol 13 is a plunger tip, symbol 14 is a plunger sleeve, symbol 15 is a gate sleeve color, symbol 16 is Reference numeral 17 denotes an extrusion pin, reference numeral 18 denotes a mold shunt, reference numeral 19 denotes a cooling water supply pipe, reference numeral 20 denotes a cooling water return pipe, and reference numeral 21 denotes a chill vent.

As shown in FIG. 1, the chill vent 21 includes a fixed chill block (first chill block) 31 attached to the fixed mold 2 and a movable mold 3, and the fixed mold 2 together with the movable mold 3. And a movable chill block (second chill block) 32 that moves forward and backward with respect to the fixed chill block 31.
As shown in any of FIG. 2 to FIG. 6 and FIG. 10, a movable side fitting portion (first fitting portion) 41 is provided on the mold matching surface (front surface: front surface) of the movable chill block 32. ing.
The movable side fitting portion 41 is a (second) fitting convex portion 143 of the fixed side fitting portion (second fitting portion) 141 provided on the mold matching surface (front surface: front surface) of the fixed chill block 31. Fitting (first) fitting recess 42 and (second) fitting recess 142 of fixed-side fitting portion 141 provided on the mold-matching surface of fixed chill block 31. And a convex portion 43.

  The movable side fitting portion 41 includes six fitting concave portions 42 and five fitting convex portions 43 along the height (vertical) direction (vertical direction in FIGS. 2 to 4) of the movable chill block 32. However, the fitting recess 42, the fitting projection 43, the fitting recess 42, the fitting projection 43, the fitting recess 42, the fitting projection 43, the fitting recess 42, the fitting projection 43, and the fitting recess 42. The fitting convex portion 43 and the fitting concave portion 42 are arranged in this order to form one row, and three rows along the width (lateral) direction of the movable chill block 32 (the horizontal direction in FIGS. 2 and 6). It is provided.

Inside the movable chill block 32, three cooling water (cooling medium) inflow paths 51 and three cooling water (cooling medium) outflow paths 52 are provided along the height direction of the movable chill block 32. Is provided.
One cooling water inflow passage 51 is provided corresponding to each row forming the movable side fitting portion 41, and the inlet of the cooling water inflow passage 51 and the back side (back side) of the upper surface of the movable chill block 32. The cooling water (cooling medium) inlet 53 provided on the side) is communicated with each other via a communication passage 54. In addition, at the inlet of each cooling water inflow passage 51, a female screw portion 55 that is screwed with a male screw portion provided at a downstream end of a cooling water supply pipe (not shown) is provided.

  One cooling water outflow passage 52 is provided corresponding to each row forming the movable side fitting portion 41, and two cooling water outflow passages 52 provided at both ends in the width direction of the movable chill block 32. The cooling water (cooling medium) discharge port 56 provided on the front side of the upper surface of the movable chill block 32 is in communication with each other via a communication passage 57. Further, at the outlet portions of the cooling water outflow passages 52 provided at both ends in the width direction of the movable chill block 32, female screw portions 60 that are screwed with male screw portions provided at the upstream end of a cooling water return pipe (not shown) are respectively provided. Is provided.

  The outlet of one cooling water outflow passage 52 provided at the center in the width direction of the movable chill block 32 and the gas discharge port 58 provided on the front side of the upper surface of the movable chill block 32 are (first). Communication is made via a gas discharge path 59. In addition, a female threaded portion that engages with a male threaded portion 62 provided on the outer peripheral surface of the (occlusion: water stop) plug 61 is provided at the outlet portion of the cooling water outflow passage 52 provided in the central portion in the width direction of the movable chill block 32. (Not shown) is provided.

  Inside the movable chill block 32, a partition wall 63 that divides the cooling water inflow passage 51 and the cooling water outflow passage 52 is attached to a through hole 64 that penetrates in the plate thickness direction. Fifteen cooling holes (bottomed holes) 66 are provided for accommodating 15 cooling water supply (cooling medium supply) pipes 65 extending toward the bottom. On the inner peripheral surface of the through hole 64, a female screw portion 68 is formed which is screwed with a male screw portion 67 a formed on the outer peripheral surface of an in hexagon screw 67 provided at the base end portion of the cooling water supply pipe 65.

  The in hexagon screw 67 has a hexagonal hexagonal hole 69 in a plan view into which a tip of a hexagonal wrench is inserted, and an axial hole (water inlet hole) 70 that extends in the axial direction and communicates with the hexagonal hole 69. Is formed. The base end portion of the cooling water supply pipe 65 is inserted into the axial hole portion 70 of the in hexagonal screw 67, and the axial hole portion 70 communicates with the internal space of the cooling water supply pipe 65. The cooling water supply pipe 65 and the in hexagon screw 67 are fixed by brazing.

  The cooling hole 66 that is a bottomed hole having a bottom at the tip is provided so that the tip is located inside the corresponding fitting projection 43. In addition, the inner peripheral surface (inner surface) of the cooling hole 66 is made of, for example, stainless steel (for example, SUS303, SUS304, SUS316, SUS321, 0.1 mm to 0.7 mm (more preferably, 0.1 mm) thick). The outer peripheral surface (outer surface) of the inner cylinder (bush) 71 made of SUS347) and having a bottom at the tip is attached in close contact.

3 and 4, reference numeral 72 indicates a through hole 64 and a cooling hole 66, a female screw portion 68 is cut on the inner peripheral surface of the through hole 64, and a cooling water supply pipe 65 is attached or detached. It is a through hole used when On the inner peripheral surface of the through hole 72, a female screw portion (not shown) that engages with the male screw portion 74 provided on the outer peripheral surface of the (closure: water stop) plug 73 is provided.
In addition, the two cooling water outflow paths 52 provided at both ends in the width direction of the movable chill block 32 and the one cooling water outflow path 52 provided in the center in the width direction of the movable chill block 32 are the most On the back side of the fitting recess 42 located below, the communication is made through a communication hole 75 extending along the width direction of the movable chill block 32.

At the center of the movable chill block 32 in the width direction, a (second) gas discharge path 76 communicating with the gas discharge path 59 is provided at the upper end of the mold-matching surface of the movable chill block 32. It is provided along the thickness (depth) direction (left-right direction in FIGS. 3 and 4). Further, the gas discharge path 76 and the three uppermost fitting recesses 42 are recessed (depressed) at a certain depth in the thickness direction of the movable chill block 32, and are viewed from the front (substantially) E. It communicates through a groove 77 having a letter shape.
The outlet of the gas discharge passage 59 is provided with a female screw portion 78 that is screwed with a male screw portion provided at the upstream end of a gas suction pipe (not shown), and a vacuum pump (see FIG. (Not shown) is connected.
2 and 6, reference numerals 79 and 80 denote holes through which extrusion pins (not shown) similar to the extrusion pins 17 shown in FIG. 1 are inserted, and fastening bolts (not shown), respectively. It is a hole.

As shown in FIGS. 7 to 9, a fixed-side fitting portion (second fitting portion) 141 is provided on the die-matching surface (front surface: front surface) of the fixed chill block 31.
The fixed-side fitting portion 141 is a (first) fitting convex portion 43 of the movable-side fitting portion (first fitting portion) 41 provided on the mold matching surface (front surface: front surface) of the movable chill block 32. Fitting (second) fitting recess 142 and (first) fitting recess 42 of movable side fitting portion 41 provided on the mold fitting surface of movable chill block 32. Joint convex portion 143.

  The fixed-side fitting portion 141 includes six fitting convex portions 143 and five fitting concave portions 142 along the height (vertical) direction of the fixed chill block 31 (vertical direction in FIGS. 7 and 8). The fitting convex 143, the fitting concave 142, the fitting convex 143, the fitting concave 142, the fitting convex 143, the fitting concave 142, the fitting convex 143, the fitting concave 142, and the fitting convex. 143, the fitting recess 142, and the fitting projection 143 are arranged in this order to form one row, and three rows are provided along the width (lateral) direction (left and right direction in FIG. 7) of the fixed chill block 31. It is a thing.

Inside the fixed chill block 31, three cooling water (cooling medium) inflow paths 151 and three cooling water (cooling medium) outflow paths 152 are arranged along the height direction of the fixed chill block 31. Is provided.
One cooling water inflow passage 151 is provided corresponding to each row forming the fixed side fitting portion 141, and the inlet of the cooling water inflow passage 151 and the back side (back surface) of the upper surface of the fixed chill block 31. The cooling water (cooling medium) inlet 153 provided on the side) is communicated with each other via a communication path 154. In addition, a female screw portion 155 that is screwed with a male screw portion provided at a downstream end of a cooling water supply pipe (not shown) is provided at an inlet portion of each cooling water inflow passage 151.

  One cooling water outflow path 152 is provided corresponding to each row forming the fixed side fitting portion 141, and is provided at the outlet of the cooling water outflow path 152 and the front side of the upper surface of the fixed chill block 31. The cooling water (cooling medium) discharge port 156 is in communication with each other via a communication path 157. Further, at the outlet of the cooling water outflow passage 152, a female screw portion 160 that is screwed with a male screw portion provided at an upstream end of a cooling water return pipe (not shown) is provided.

  Inside the fixed chill block 31, a partition wall 163 that divides the cooling water inflow passage 151 and the cooling water outflow passage 152 is attached to a through-hole 164 that penetrates in the plate thickness direction. Eighteen cooling holes (bottomed holes) 166 are provided to accommodate 18 cooling water supply (cooling medium supply) pipes 65 extending toward the bottom. On the inner peripheral surface of the through hole 164, a female screw portion 168 is formed that is screwed with a male screw portion 67 a formed on the outer peripheral surface of an in hexagon screw 67 provided at the base end portion of the cooling water supply pipe 65.

  The in hexagon screw 67 has a hexagonal hexagonal hole 69 in a plan view into which a tip of a hexagonal wrench is inserted, and an axial hole (water inlet hole) 70 that extends in the axial direction and communicates with the hexagonal hole 69. Is formed. The base end portion of the cooling water supply pipe 65 is inserted into the axial hole portion 70 of the in hexagonal screw 67, and the axial hole portion 70 communicates with the internal space of the cooling water supply pipe 65. The cooling water supply pipe 65 and the in hexagon screw 67 are fixed by brazing.

  The cooling hole 166, which is a bottomed hole having a bottom at the tip, is provided so that the tip is located inside the corresponding fitting convex 143. In addition, the inner peripheral surface (inner surface) of the cooling hole 166 has a thickness of 0.1 mm to 0.7 mm (more preferably, 0.1 mm), for example, stainless steel (for example, SUS303, SUS304, SUS316, SUS321, The outer peripheral surface (outer surface) of the inner cylinder (bush) 71 made of SUS347) and having a bottom at the tip is attached in close contact.

Note that reference numeral 172 in FIG. 8 denotes a case where the through hole 164 and the cooling hole 166 are formed, the internal thread portion 168 is cut on the inner peripheral surface of the through hole 164, and the cooling water supply pipe 65 is attached or detached. It is a through hole used for. On the inner peripheral surface of the through hole 172, a female screw portion (not shown) that is screwed with the male screw portion 174 provided on the outer peripheral surface of the (closure: water stop) plug 173 is provided.
Moreover, the code | symbol 180 in FIG.7 and FIG.9 is a hole by which a fastening bolt (not shown) is fastened.

Now, as shown in FIG. 10, the fitting concave part 42, the fitting convex part 43, the fitting concave part 142, and the fitting convex part 143 which concern on this embodiment are formed in step shape.
That is, the fitting recess 42 includes a bottom surface 44, a first slope 45, a second slope 46, a third slope 47, a first connection surface (stepping surface) 48, and a second connection surface. (Tread surface) 49.
On the other hand, the fitting convex portion 43 includes a top surface 50, a first inclined surface 45, a second inclined surface 46, a third inclined surface 47, a first connecting surface (step surface) 48, and a second A connection surface (tread surface) 49.

The bottom surface 44, the first connection surface (step surface) 48, the second connection surface (step surface) 49, and the top surface 50 are formed so as to be parallel to the back surface (back surface) of the movable chill block 32. ing.
The first inclined surface 45, the second inclined surface 46, and the third inclined surface 47 are formed so as to taper from the bottom surface 44 toward the top surface 50 and to widen toward the bottom surface 44 from the top surface 50, respectively. Has been. The first slope 45, the second slope 46, and the third slope 47 are formed to be parallel to each other.
The first connection surface 48 is a surface that connects the first slope 45 and the second slope 46, and the second connection surface 49 connects the second slope 46 and the third slope 47. Surface.

The fitting recess 142 includes a bottom surface 144, a first slope 145, a second slope 146, a third slope 147, a first connection surface (step surface) 148, and a second connection surface. (Tread) 149.
On the other hand, the fitting convex portion 143 includes a top surface 150, a first slope 145, a second slope 146, a third slope 147, a first connection surface (step surface) 148, and a second A connection surface (tread surface) 149.

The bottom surface 144, the first connection surface (step surface) 148, the second connection surface (step surface) 149, and the top surface 150 are formed so as to be parallel to the back surface (back surface) of the fixed chill block 31. ing.
The first inclined surface 145, the second inclined surface 146, and the third inclined surface 147 are formed so as to taper from the bottom surface 144 toward the top surface 150 and to widen toward the bottom surface 144 from the top surface 150, respectively. Has been. The first slope 145, the second slope 146, and the third slope 147 are formed to be parallel to each other.
The first connection surface 148 is a surface that connects the first slope 145 and the second slope 146, and the second connection surface 149 connects the second slope 146 and the third slope 147. Surface.

The bottom surface 44 and the top surface 150, the first slope 45 and the third slope 147, the second slope 46 and the second slope 146, the third slope 47 and the first slope 145, the top surface 50 and the bottom surface. 144, the first connection surface 48 and the second connection surface 149, and the second connection surface 49 and the first connection surface 148 are formed to be parallel to each other.
Further, a gap g1 between the bottom surface 44 and the top surface 150, a gap g2 between the first slope 45 and the third slope 147, a gap g3 between the second slope 46 and the second slope 146, and a third slope 47. And the first slope 145, the gap g5 between the top surface 50 and the bottom surface 144, the gap g6 between the first connection surface 48 and the second connection surface 149, the second connection surface 49 and the first surface 145. The gaps g7 with the connection surface 148 are set to be constant (1.0 mm in this embodiment).

Further, the depth of the first connection surface 48 (distance from the first inclined surface 45 to the second inclined surface 46) and the depth of the second connection surface 49 (distance from the second inclined surface 46 to the third inclined surface 47). ), Depth of the first connection surface 148 (distance from the first slope 145 to the second slope 146), depth of the second connection surface 149 (distance from the second slope 146 to the third slope 147) ) Are set to be constant (1.0 mm in this embodiment).
That is, in the present embodiment, the depth and gap g3 of the first connection surface 48, the depth and gap g4 of the second connection surface 49, the depth and gap g3 of the first connection surface 148, and the second connection surface 149. The depth and the gap g2 are set to be equal to each other.

Next, the flow (path) of the cooling water until the cooling water guided into the movable chill block 32 through the cooling water inlet 53 is discharged out of the movable chill block 32 through the cooling water discharge port 56 is shown. explain.
The cooling water introduced into the movable chill block 32 through the cooling water inlet 53 to which the downstream end of the cooling water supply pipe is connected is passed through the cooling water inflow passage 51 into the axial hole 70 of the in hexagon screw 67. Led to.

The cooling water introduced into the axial hole 70 of the inner hexagonal screw 67 flows into the internal space of the cooling water supply pipe 65 and flows after colliding with the bottom of the inner cylinder 71 from the tip of the cooling water supply pipe 65. The direction is reversed and the cooling water supply pipe 65 is guided to the cooling water outflow passage 52 through the space between the outer peripheral surface (outer surface) of the cooling water supply pipe 65 and the inner peripheral surface (inner surface) of the inner cylinder 71.
Then, the cooling water guided to the cooling water outflow passage 52 is discharged out of the movable chill block 32 through the cooling water discharge port 56 to which the upstream end of the cooling water return pipe is connected.
Here, the cooling water guided to the single cooling water outflow passage 52 provided at the central portion in the width direction of the movable chill block 32 is passed through the communication hole 75 to both ends in the width direction of the movable chill block 32. After being led to the two cooling water outflow paths 52 provided, the cooling water return pipe is discharged to the outside of the movable chill block 32 through the cooling water discharge port 56 connected to the upstream end.

  The gas existing between the mold matching surface of the fixed chill block 31 and the mold matching surface of the movable chill block 32 is sucked by the vacuum pump and flows into the groove 77, and then passes through the gas discharge path 76. After being guided to the discharge path 59, it is discharged out of the movable chill block 32 via a gas discharge port 58 to which the upstream end of the gas suction pipe is connected.

Subsequently, the flow (path) of the cooling water until the cooling water introduced into the fixed chill block 31 through the cooling water inlet 153 is discharged out of the fixed chill block 31 through the cooling water discharge port 156 is changed. explain.
The cooling water introduced into the fixed chill block 31 through the cooling water inlet 153 to which the downstream end of the cooling water supply pipe is connected is passed through the cooling water inflow passage 151 into the axial hole portion 70 of the hexagonal screw 67. Led to.

The cooling water introduced into the axial hole 70 of the inner hexagonal screw 67 flows into the internal space of the cooling water supply pipe 65 and flows after colliding with the bottom of the inner cylinder 71 from the tip of the cooling water supply pipe 65. The direction is reversed and the cooling water supply pipe 65 is led to the cooling water outflow passage 152 through the space between the outer peripheral surface (outer surface) of the cooling water supply pipe 65 and the inner peripheral surface (inner surface) of the inner cylinder 71.
Then, the cooling water guided to the cooling water outflow path 152 is discharged out of the fixed chill block 31 through the cooling water discharge port 156 to which the upstream end of the cooling water return pipe is connected.

According to the chill vent 21 according to the present embodiment, a step-like gas vent passage is formed between the die-matching surface of the fixed chill block 31 and the die-matching surface of the movable chill block 32. That is, the gas and the molten metal guided from the cavity 8 meander finely when passing through the gas vent passage formed between the die-matching surface of the fixed chill block 31 and the die-matching surface of the movable chill block 32. The flow energy of gas and molten metal can be reduced (consumed) faster than the conventional one.
Accordingly, the gaps g1 to g7 between the mold fitting surface of the fixed chill block 31 and the mold fitting surface of the movable chill block 32, that is, the distance in the depth direction of the gas vent passage is increased (increased) compared to the conventional one. And the escape of gas remaining in the cavity 8 can be improved, and the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified can be shortened. Replacement can be facilitated.
In addition, since the molten metal that has flowed into the gas vent passage is cooled and solidifies completely, it is possible to prevent the melt from being ejected from the gas vent passage and to ensure safety during operation. Can do.

Further, according to the chill vent 21 according to the present embodiment, the slopes 45 and 46 that form the fitting convex portion 43 of the movable side fitting portion 41 and the slope 145 that forms the fitting concave portion 142 of the fixed side fitting portion 141. , 146, the gas and the molten metal that have passed through the gas vent passage formed between the connecting surfaces 48 and 49 that form the fitting convex portion 43 of the movable side fitting portion 41 or the fitting of the fixed side fitting portion 141. Colliding with the connecting surfaces 148 and 149 forming the joint recess 142, the flow energy of the gas and the molten metal is also reduced (consumed) at that time.
As a result, the gaps g1 to g7 between the mold-matching surface of the fixed chill block 31 and the mold-matching surface of the movable chill block 32, that is, the distance in the depth direction of the gas vent passage can be further increased (increased). 8 can further improve the escape of gas remaining in the gas outlet, and can further shorten the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified. Substitution can be made even easier.

Furthermore, according to the chill vent 21 according to the present embodiment, a plurality of flow paths for circulating a cooling medium such as water are provided inside (inside) the fixed chill block 31 and the movable chill block 32. The fixed chill block 31 and the movable chill block 32 are sufficiently deprived of heat, and the fixed chill block 31 and the movable chill block 32 are sufficiently cooled. As a result, it is possible to further reduce the cooling time until the molten metal that has flowed into the gas vent passage is cooled and completely solidified, and further facilitate replacement of the molten metal with the gas.
Furthermore, since the inner cylinder 71 made of metal is accommodated inside (inside) the chill vent 21 and the cooling hole 66 according to the present embodiment, the fixed chill block 31 and / or the movable chill block is accommodated. Even when cracks or cracks penetrating in the thickness direction of 32 occur, a cooling medium such as water flowing through the inside (inside) of the fixed chill block 31 and / or the movable chill block 32 causes the fixed chill block 31 and / or Or it can prevent leaking outside the movable chill block 32.

  Furthermore, according to the chill vent 21 according to the present embodiment, rust generated on the inner surface of the inner cylinder 71, and chalk and scale attached to the inner surface of the inner cylinder 71 are suppressed. As a result, the cooling efficiency of the chill vent 21 can be maintained over a long period of time, and the reliability of the chill vent 21 can be improved.

  Furthermore, according to the chill vent 21 according to the present embodiment, the plurality of cooling holes 66 are provided in the fitting convex portions 43 and 143 so that the tip portions thereof are located respectively, and the fixed chill block 31 and the movable chill block 32 are cooled most efficiently, so that it is possible to further reduce the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified, and the molten metal and the gas Can be further facilitated.

  According to the die casting mold (casting mold) 1 provided with the chill vent 21 according to the present embodiment, it is possible to shorten the cooling time until the molten metal flowing into the gas vent passage is cooled and completely solidified. It is possible to easily replace the gas with the gas, and a chill vent is provided that can prevent the molten metal from being ejected from the gas vent passage. And safety at the time of work can be improved.

In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above-described embodiment, the fitting concave portion 42 and the fitting convex portion 43 include three inclined surfaces 45, 46, 47 and two connection surfaces 48, 49, the fitting concave portion 142, and the fitting The joint convex portion 143 has been described as one specific example including three slopes 145, 146, 147 and two connection surfaces 148, 149, but the present invention is not limited to this. The fitting concave portion 42 and the fitting convex portion 43 are provided with two inclined surfaces 45 and 46 and one connecting surface 48, and the fitting concave portion 142 and the fitting convex portion 143 are provided with two inclined surfaces 145. , 146 and one connection surface 148, and the fitting recess 42 and the fitting projection 43 include four or more slopes and three or more connection surfaces. The provided concave fitting 142 and the fitting convex 143 are 4 And more slopes, and three or more connecting surfaces, it may be one having a.

  Moreover, you may employ | adopt the surface which becomes orthogonal to a connection surface and parallel to a horizontal surface instead of a slope.

  Furthermore, in the above-described embodiment, the inner cylinder 71 has been described with a specific example made of stainless steel, but the present invention is not limited to this, and other metals (copper, brass, It may be made from die steel (SKD61) or the like.

  Furthermore, in the above-described embodiment, the chill vent 21 applied to the die casting mold 1 used in die casting is described as a specific example, but the present invention is not limited to this, The present invention can also be applied to a casting mold used in casting (for example, gravity casting, low pressure casting).

  Furthermore, in the above-described embodiment, the cooling water is described as a specific example as the cooling medium, but the present invention is not limited to this and may be a liquid or gas other than water.

1 Die casting mold (casting mold)
2 fixed mold 3 movable mold 8 cavity 21 chill vent 31 fixed chill block 32 movable chill block 41 movable side fitting part 42 fitting concave part 43 fitting convex part 45 first slope 46 second slope 47 third slope 48 1st connection surface 49 2nd connection surface 66 Cooling hole (bottomed hole)
71 Inner cylinder 141 Fixed side fitting portion 142 Fitting recess 143 Fitting projection 145 First slope 146 Second slope 147 Third slope 148 First connection surface 149 Second connection surface g2 gap g3 gap g4 Gap

Claims (4)

A fixed chill block that is attached to the fixed mold, and a movable chill block that is attached to the movable mold and moves forward and backward with respect to the fixed mold and the fixed chill block together with the movable mold,
A gas vent passage communicating with a cavity formed between the fixed mold and the movable mold is formed between the mold fitting surface of the fixed chill block and the mold fitting surface of the movable chill block. A chill vent,
The fixed-side fitting portion provided on the mold-matching surface of the fixed chill block includes a fitting recess for receiving a fitting convex portion of the movable-side fitting portion provided on the mold-matching surface of the movable chill block, and the movable A fitting convex part that fits into the fitting concave part of the side fitting part,
The movable side fitting portion provided on the mold fitting surface of the movable chill block includes a fitting concave portion that receives the fitting convex portion of the fixed side fitting portion provided on the mold fitting surface of the fixed chill block; A fitting convex part that fits into the fitting concave part of the fixed side fitting part,
The fitting convex part and the fitting concave part of the movable side fitting part, the fitting convex part and the fitting concave part of the fixed side fitting part are each formed in a step shape,
The fitting convex portion and the fitting concave portion of the movable side fitting portion, and the fitting convex portion and the fitting concave portion of the fixed side fitting portion, respectively, connect at least two slopes and at least one of these neighboring slopes. And two connecting surfaces,
A gap between one slope forming the fitting convex part of the movable side fitting part and one slope forming the fitting concave part of the fixed side fitting part formed so as to face the slope. The gap between the other slope forming the fitting convex portion of the movable side fitting portion and the other slope forming the fitting concave portion of the fixed side fitting portion formed so as to face the slope. And the slope and the connection surface are formed so that the depth which is the distance between the adjacent slopes connected by the connection surface is equal,
The fitting convex part and the fitting concave part of the movable side fitting part are alternately provided so as to form a row in the extending direction of the gas vent passage,
Inside each fitting convex portion of the movable side fitting portion, a movable side cooling medium passage having a bottom portion at a tip portion is provided,
A movable-side cooling medium inflow passage for guiding a cooling medium supplied to the movable-side cooling medium passage is provided so as to have a bottom portion on the cavity side along the extending direction of the degassing passage;
Each of the movable-side cooling medium passages is sequentially connected to an intermediate position of the movable-side cooling medium inflow path via a movable-side cooling medium supply pipe .
The fitting convex part and the fitting concave part of the fixed side fitting part are alternately provided so as to form a row in the extending direction of the gas vent passage,
In each of the fitting convex portions of the fixed side fitting portion, a fixed side cooling medium passage having a bottom portion at a tip portion is provided,
A fixed-side cooling medium inflow passage for guiding a cooling medium supplied to the fixed-side cooling medium passage is provided so as to have a bottom portion on the cavity side along the extending direction of the gas vent passage;
The chill vent , wherein each of the fixed-side cooling medium passages is sequentially connected to an intermediate position of the fixed-side cooling medium inflow path via a fixed-side cooling medium supply pipe . A blind hole of the plurality of having a bottom at the distal end portion, is accommodated so as to contact the inside of the bottomed holes, therein, to form the cooling medium passage, a plurality of made of metal The chill vent according to claim 1, wherein an inner cylinder is provided inside the movable chill block and inside the fixed chill block. The chill vent according to claim 2 , wherein the metal is stainless steel. A casting mold comprising the chill vent according to any one of claims 1 to 3 .

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