JP2005059035A - Structure and method for cooling die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die cooling structure which can efficiently cool molten metal filled up in a cavity and provides a cooling block very easily manufactured, and a die cooling method which is performed by using this cooling structure. <P>SOLUTION: The structure for cooling the die for die casting, is provided with a sliding core 1 having a core holder 11, and in the core holder 11, a core die 12 is fixed, and in the core die 12, the cooling block 13 is fixed. The cooling block 13 is constituted by laminating three platy members composed of a first plate member 41, a second plate member 42 and a third plate member 43. On the back surface 42B of the second plate member 42 abutted on the first plate member 41, a first groove 42c constituted of a cooling medium flowing passage is formed, and on the back surface 43B of the third plate member 43 abutted on the second plate member 42, a second groove 43c constituted of the cooling medium flowing passage is formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mold cooling structure and a mold cooling method, and in particular, a cooling medium flow path is formed at a predetermined position in the mold, and the predetermined medium in the mold is flowed through the cooling medium flow path. The present invention relates to a mold cooling structure for cooling the position and the entire mold, and a mold cooling method performed using the cooling structure.

  2. Description of the Related Art Conventionally, there is known a mold cooling structure in which a cooling medium flow path is formed in a mold, and the mold is cooled by flowing a cooling medium such as oil or water into the cooling medium flow path.

Japanese Patent Application Laid-Open No. 5-329610 discloses a cooling structure for a mold for molten metal forging having a cooling block in the mold. The cooling block is provided in each of the movable mold and the fixed mold, and can be brought into contact with a partition wall that defines a cavity in the movable mold and the fixed mold. A cooling medium flow path is formed in the cooling block. After the molten metal is injected into the cavity, the molten medium in the cavity is cooled via the partition wall by flowing the cooling medium through the cooling medium flow path in the cooling block with the cooling block in contact with the partition. It is configured to be able to.
JP-A-5-329610 (pages 2 to 4, FIG. 1)

  However, Japanese Patent Laid-Open No. 5-329610 does not disclose how to form the cooling medium flow path in the cooling block. When it is necessary to form a complicated cooling medium flow path in the cooling block, it is difficult to form the cooling medium flow path, and it is difficult to manufacture the cooling block itself.

  In addition, since the cooling block is provided at a position inside the mold of the partition wall, even when the cooling block is in contact with the partition wall, the distance from the cooling medium flow path to the cavity in the cooling block is small. The length of the mold inevitably increased, and the desired position of the mold could not be efficiently cooled.

  Therefore, the present invention provides a mold cooling structure including a cooling block that can efficiently cool the molten metal filled in the cavity and is extremely easy to manufacture, and a mold cooling method performed using the cooling structure. Objective.

  In order to achieve the above object, the present invention has a mold comprising a holder 11 and a die 12 fixed to the holder 11, the die 12 defining a cavity, and the mold includes a cooling block. In the mold cooling structure in which the housing block 12a is formed and the cooling block 13 in which the cooling medium flow path 13a is formed is housed and fixed in the cooling block housing space 12a, the cooling block 13 includes the first member 41, The second member 42 and the third member 43 are laminated, and the first member 41 and the second member 42 each have a plate shape having one surface 42B and the other surface 41A. 43 has at least one flat surface 43B, and the second member 42 has the third member 43 so that the flat surface 43B of the third member 43 and the other surface 42A of the second member 42 face each other. 43, the first member 4 The one surface 42B of the second member 42 and the other surface 41A of the first member 41 are stacked on the second member 42 so as to face each other, and the other surface of the first member 41 A first main passage 42c is formed between the surface 41A and the one surface 42B of the second member 42, and the other surface 42A of the second member 42 and the flat surface 43B of the third member 43 A second main passage 43c is formed between the first main passage 42c and the second main passage 43c via the cooling medium passages 13f and 13g formed in the die 12. One of the cooling medium supply passage and the discharge passage can be connected to the main passage 42c, and the other of the cooling medium supply passage and the discharge passage can be connected to the second main passage 43c. The cooling medium is supplied or discharged from the first main passage 42c, and the cooling medium is supplied from the second main passage 43c. By being out or supplied, it provides a mold cooling structure in which the cavity position near the mold is cooled.

  Here, a concave portion 12c is formed on the back surface of the die 12 with respect to the surface defining the cavity, and the third member 43 has a convex portion 13D that can be inserted into the concave portion 12c. The cooling medium passage 13f is preferably formed of a gap formed between the convex portion 13D and the die 12 when the convex portion 13D is inserted into the concave portion 12c.

  The die 12 has a cooling pipe insertion hole 12b into which the cooling pipe 16 can be inserted. The cooling pipe 16 is inserted into the cooling pipe insertion hole 12b to form an internal flow path inside the cooling pipe 16. An external flow path is formed between the cooling pipe 16 and the cooling pipe insertion hole 12b. The internal flow path and the external flow path communicate with each other in the cooling pipe insertion hole 12b. It is preferable that the first main passage 42c communicates, the external flow passage communicates with the second main passage 43c, and the cooling medium passage 13g includes the cooling pipe insertion hole 12b.

  The first main passage 42c has a groove formed in at least one of the other surface 41A of the first member 41 and the one surface 42B of the second member 42. The other surface 41A is provided by covering the one surface 42B of the second member 42, and the second main passage 43c is formed between the other surface 42A of the second member 42 and the third member 43. It is preferable that a groove is formed in at least one of the one surface 43B, and the other surface 42A of the second member 42 is provided by covering the one surface 43B of the third member 43.

  Further, the present invention has a mold including a holder 11 and a die 12 fixed to the holder 11, the die 12 defines a cavity, and a cooling block accommodation space 12 a is formed in the mold. The cooling block 13, 13 ′ in which a plurality of cooling medium flow paths 13 a, 13 a ′ are formed is a mold cooling structure that is housed and fixed in the cooling block housing space 12 a, and the cooling blocks 13, 13 ′ Communicates with the cooling medium flow paths 13a and 13a ′, and supplies the cooling medium flow paths 13a and 13a ′ with the supply ports 41a and 41a ′ and the cooling medium flow paths 13a and 13a ′. Each of the plurality of cooling medium flow paths 13a and 13a 'is branched from the supply ports 41a and 41a'. Other than The cooling medium flow paths 13a and 13a 'converge to the discharge ports 41b and 41b' and communicate with the cooling medium flow paths 13a and 13a 'communicating with the supply ports 41a and 41a' and the discharge ports 41b and 41b '. The cooling medium flow paths 13a and 13a 'communicate with each other through a plurality of cooling medium passages 13f and 13g formed in the die, and the cooling medium is supplied from the supply ports 41a and 41a'. A mold cooling structure is provided in which the cooling medium is discharged from the outlets 41b and 41b 'to cool the vicinity of the cavity of the mold.

  The present invention also provides a mold cooling method performed using the mold cooling structure.

  According to the mold cooling structure described in claims 1 and 2, the cooling block is formed by laminating the first member, the second member, and the third member, and the other surface of the first member and one of the second members. A first main passage is formed between the second member and the other member and a flat surface of the third member. The first main passage and the second main passage are formed by a die. The first main passage can be connected to one of the cooling medium supply passage and the discharge passage, and the second main passage can be connected to the cooling medium supply passage and the discharge passage. Since the other of the passages can be connected, the cooling medium flow path in the cooling block can be constituted by the first main passage and the second main passage. For this reason, the cooling medium flow path can be easily formed in the cooling block, and the manufacturing of the cooling block can be extremely facilitated.

  According to the mold cooling structure of the third aspect, since the cooling block is accommodated and fixed in the die, especially when the die is a core die, the core is pressed by the casting pressure. Can be prevented from being displaced, and burrs due to the displacement of the core can be prevented.

  According to the mold cooling structure of claim 4, the first main passage has a groove formed in at least one of the other surface of the first member and one surface of the second member, and the other of the first member A surface is provided by covering one surface of the second member, and the second main passage has a groove formed in at least one of the other surface of the second member and the one surface of the third member; Since the other surface is provided by covering one surface of the third member, the cooling medium flow path in the cooling block can be formed very easily.

  According to the mold cooling structure of the fifth aspect, the cooling block includes a supply port that communicates with the cooling medium flow path and supplies the cooling medium flow path, and communicates with the cooling medium flow path to discharge the cooling medium. Each of the plurality of cooling medium flow paths branches off from the supply port, and the other plurality of cooling medium flow paths converge at the discharge port and communicate with the supply port. The cooling medium flow path and the cooling medium flow path communicating with the discharge port communicate with each other through a plurality of cooling medium passages formed in the die, the cooling medium is supplied from the supply port, and the cooling medium is supplied from the discharge port. Since the position near the cavity of the mold is cooled by being discharged, it is only necessary to form one cooling medium supply passage and one discharge passage in the holder. For this reason, the strength of the holder can be increased. Further, in the case of the core holder, the area of the inclined surface that makes a so-called retraction stop of the core holder can be increased.

  According to the mold cooling method of the sixth aspect, since the cooling medium is supplied from the cooling block to the cooling medium passage formed in the die, the desired position of the mold can be efficiently cooled.

  A mold cooling structure and a mold cooling method according to an embodiment of the present invention will be described with reference to FIGS. More specifically, the die cooling structure is a die-casting die cooling structure. As shown in FIG. 1, the die cooling structure includes a die-casting die including a slide core 1, a fixed die 2, and a movable die 3. doing. The fixed mold 2 includes a fixed holder 21 and a fixed die 22. The movable mold 3 includes a movable holder 31 and a movable die 32, and is movable in the moving direction of the movable mold 3 indicated by arrows A ← → A ′.

  In FIG. 1, the fixed mold 2 is shown on the left side of FIG. 1, and the movable mold 3 and the slide core 1 are shown on the right side. In addition, the fixed mold 2 having the die-cast mold cooling structure is not always located on the left side of the movable mold 3 and the slide core 1.

  The slide core 1 includes a core holder 11 and a core die 12. The core die 12 is fixed to the core holder 11, and the movable die 3 is moved together with the movable die 32 by an arrow A ← → A ′. Can move in one direction. The slide core 1 is slidable in a direction substantially perpendicular to the moving direction of the movable mold 3, that is, in a direction indicated by arrows B ← → B ′ in FIG. Further, in the downward direction of FIG. 1, a cavity (not shown) is defined by the fixed die 22, the movable die 32, and the core die 12.

  As shown in FIG. 1, the core holder 11 has a first inclined surface 11 </ b> S that extends in the direction of A ′ → A, which is the direction in which the movable mold 3 moves approximately. On the other hand, the fixed holder 21 has a second inclined surface 21 </ b> S that extends in the direction of A → A ′, which is the substantially moving direction of the movable mold 3.

  At the time of casting, as shown in FIG. 1, the movable mold 3 and the slide core 1 are moved in the direction indicated by A ′ → A and approaching the fixed mold 2, and the mold is clamped. The At this time, the first inclined surface 11S and the second inclined surface 21S come into contact with each other so that the core holder 11 is prevented from retreating outward from the die casting die, that is, upward in FIG. It is configured. The first inclined portion 11 </ b> S and the second inclined portion 21 </ b> S form a so-called reverse stopper that prevents the core holder 11 from moving backward.

  A cooling block accommodating space 11a is formed on the surface 11A to which the core die 12 of the core holder 11 is fixed. The cooling block housing space 11a is formed by drilling and is recessed in the direction from the surface 11A to which the core die 12 is fixed to the back surface 11B, and matches the outer shape of the cooling block 13 described later. The cooling block 13 is accommodated and fixed in the cooling block accommodation space 11a. Further, the core holder 11 is formed with two through holes 11b and 11c penetrating from the surface 11A to which the core die 12 is fixed toward the back surface. Tube members 14 and 15 for flowing a cooling medium are inserted into the through holes 11b and 11c, respectively. The pipe member 14 corresponds to a cooling medium supply passage, and the pipe member 15 corresponds to a discharge passage. A cooling medium supply pipe (not shown) connected to a cooling medium supply source (not shown) is connected to the pipe member 14.

  One surface of the core die 12 forms the tip surface 12A of the core die and defines a cavity. The tip surface 12A of the core die is provided with a convex portion 12C (FIG. 2) and a convex portion 12D that follow the shape of the cast product.

  A cooling block housing space 12a is formed on the back surface 12B facing the front end surface 12A of the core die 12. The cooling block housing space 12a is formed by drilling and is recessed from the back surface 12B toward the tip surface 12A of the core die, and matches the outer shape of the cooling block 13 described later. The cooling block 13 is accommodated and fixed in the cooling block accommodation space 12a. The cooling block 13 is fixed in the cooling block housing space 12 a by sandwiching the cooling block 13 between the core die 12 and the core holder 11.

  In addition, at the position corresponding to the convex portion 12C in the cooling block accommodating space 12a, the shape of the convex portion 12C is such that the thickness of the core die 12 in the direction connecting the tip surface 12A and the back surface 12B of the core die is thin. A recess 12c is formed following the above. The concave portion 12c is formed to be recessed from the back surface 12B toward the tip surface 12A of the core die by drilling. The thickness of the core die 12 at the bottom position, which is the position closest to the tip surface 12A of the core die in the recess 12c, is 4 mm to 10 mm, which is significantly thinner than that conventionally 15 mm to 20 mm. ing. A convex portion 13D of a cooling block 13 described later is inserted into the concave portion 12c. When the convex portion 13D of the cooling block 13 is inserted into the concave portion 12c, a gap is formed between the concave portion 12c and the convex portion 13D of the cooling block 13, and this gap forms a cooling medium passage 13f.

  Further, as shown in FIGS. 1 and 2, the core die 12 is formed with a cooling pipe insertion hole 12b. The cooling tube insertion hole 12b is formed from the back surface 12B of the core die 12 toward the tip end surface 12A of the core die that defines the cavity until reaching a predetermined position in the convex portion 12D. Is inserted to constitute the cooling medium passage 13g.

  Inside the cooling block 13, a cooling medium flow path 13a that forms a flow path for the cooling medium is formed. The cooling medium flow path 13a opens at three places on the front surface 13A of the cooling block 13, and opens at two places on the back face 13B. The cooling medium flows in the cooling medium flow path 13a, the cooling medium is supplied to the cooling medium paths 13f and 13g formed in the core die 12, and the cooling medium flows in the cooling medium paths 13f and 13g. The position near the cavity of the mold 2 is configured to be cooled.

  More specifically, the cooling block 13 is constituted by three plate-like members including a first plate member 41, a second plate member 42, and a third plate member 43, which are shown in FIG. By stacking as shown in FIG. 2, one cooling block 13 is formed. The first plate member 41, the second plate member 42, and the third plate member 43 correspond to a first member, a second member, and a third member, respectively.

  Since the first plate member 41 and the second plate member 42 have a plate shape, the first plate member 41 and the second plate member 42 have two flat surfaces, that is, front surfaces 41A and 42A and back surfaces 41B and 42B. Here, the back surface and the front surface correspond to one surface and the other surface, respectively. The third plate member 43 is also composed of a plate-shaped member having two flat surfaces, a front surface 43A and a back surface 43B, and is a part of the plate-shaped member, and the cooling block 13 is a core. On the surface 13A facing the core die 12 when housed in the die 12, a convex portion 13D that substantially matches the outer shape of the concave portion 12c of the core die 12 is provided. The convex portion 13 </ b> D is inserted into the concave portion 12 c when the cooling block 13 is accommodated in the core die 12.

  The second plate member 42 is stacked such that the front surface 42A faces the back surface 43B of the third plate member 43, and the first plate member 41 has the front surface 41A facing the back surface 42B of the second plate member 42. In this way, they are laminated.

  The first plate member 41 is formed with two through holes 41a and 41b penetrating in the thickness direction. The through holes 41a and 41b correspond to a supply port and a discharge port, respectively, and communicate with the through holes 11b and 11c of the core holder 11, and the pipe members 14 and 15 are inserted therein. A first groove 42c is formed on the back surface 42B of the second plate member 42 that contacts the first plate member 41. The first groove 42c guides the cooling medium to the positions of through holes 42a and 42b described later. The second plate member 42 branches off on the back surface 42B. Therefore, the cooling medium flow path 13a constituted by the first groove 42c has a shape branched from the through hole 41a corresponding to the supply port.

  The third plate member 43 is formed with a through hole 43a penetrating toward the front surface 43A side of the third plate member 43, and the through hole 43a is on the front surface 43A side with respect to the back surface 43B contacting the second plate member 42. Is opened at a position near the base end of the convex portion 13D provided in the upper portion, and communicates with the cooling medium passage 13f. The through hole 43 a communicates with the through hole 42 a formed in the second plate member 42 when the second plate member 42 and the third plate member 43 are overlaid.

  A second groove 43 c is formed on the back surface 43 </ b> B of the third plate member 43 that comes into contact with the second plate member 42. The second groove 43c forms a second main passage in a state covered by the surface 42A of the second plate member 42 so as to be covered from the stacking direction, and is branched in the same way as the first groove 42c. A through hole 43b that penetrates toward the surface 43A of the third plate member 43 is formed at a predetermined position of the branched groove. Therefore, the cooling medium flow path 13a constituted by the second groove 43c has a shape that converges in the through hole 41b corresponding to the discharge port. The through hole 43b opens at a position in the vicinity of the base end of the convex portion 13D provided on the front surface 43A with respect to the back surface 43B that contacts the second plate member 42, and communicates with the cooling medium passage 13f.

  A through hole 43d is formed at a predetermined position of the second groove 43c so as to penetrate the cooling pipe 16 through the third plate member 43 in the thickness direction. Since the outer diameter of the cooling pipe 16 passing through the through hole 43d is smaller than the diameter of the through hole 43d, a gap is formed between the through hole 43d and the cooling pipe 16. The diameter of the through hole 43d is equal to the diameter of the cooling pipe insertion hole 12b formed in the core die 12, and the through hole 43d communicates with the cooling pipe insertion hole 12b. A through hole 42 d that penetrates in the thickness direction of the second plate member 42 is formed at a position of the second plate member 42 that faces the through hole 43 d formed in the third plate member 43. The diameter of the through hole 42d is equal to the outer diameter of the cooling pipe 16, and one end of the cooling pipe 16 is inserted into the through hole 42d.

  The cooling pipe 16 is inserted into the cooling pipe insertion hole 12b, an internal flow path communicating with the first main passage is formed inside the cooling pipe 16, and the second main passage is formed between the cooling pipe 16 and the cooling pipe insertion hole 12b. An external flow path communicating with is formed. The internal flow path and the external flow path communicate with each other in the vicinity of the deepest portion in the cooling pipe insertion hole 12b, and the cooling pipe insertion hole 12b forms a cooling medium passage.

  Further, a through hole 42b that penetrates the second plate member 42 in the thickness direction is formed at a predetermined position of the second groove 43c. The through hole 42 b communicates with the through hole 41 b of the first plate member 41. The through holes 41a, 41b, 42a, 42b, 42d, 43a, 43b, 43d, the first groove 42c, and the second groove 43c form the cooling medium flow path 13a.

  Further, the cooling medium flowing in the cooling medium flow path 13f and the through holes 41a, 41b, 42a, 42b, 43a, 43b, the first groove 42c, and the second groove 43c is fixed from the contact surfaces of the plate members 41 to 43. In order to prevent leakage to the outside of the mold 2 and to prevent the cooling medium flowing in the first groove 42c from leaking from the contact surfaces of the plate members 41 to 43 to the second groove 43c. In addition, as shown in FIG. 1 or FIG. 2, seal members 44A, 44B, and 44C are provided at predetermined positions on the contact surfaces of the plate members 41 to 43, respectively.

  A through hole 42b formed in the second plate member 42 and a through hole 41b formed in the first plate member 41 between the back surface 42B of the second member 42 and the front surface 41A of the first member 41 are connected. A seal member 44A provided around the connected position, and a through-hole 43a formed in the third plate member 43 between the back surface 43B of the third member 43 and the surface 42A of the second member 42. The seal member 44B provided around the connection position to which the through hole 42a formed in the second plate member 42 is connected is formed of an O-ring. The other seal member 44C is a liquid seal.

  In the mold cooling method performed at the time of casting, a cooling medium supply pipe (not shown) is provided to the core holder 11 that houses the core die 12 in a state where the cooling block 13 is housed in the cooling block housing spaces 11a and 12a. The cooling medium discharge pipe is connected to the pipe member 14 inserted into the through hole 11b.

  Next, cooling oil is supplied from a cooling medium supply pipe (not shown). The cooling oil that has flowed from the cooling medium supply pipe into the through hole 41a of the first plate member 41 via the through hole 11b of the core holder 11 branches through the first groove 42c and passes through the through hole of the second plate member 42. 42a passes through the through hole 43a of the third plate member 43 and flows into the cooling medium passage 13f. Then, it flows through the cooling medium passage 13f, passes through the through hole 43b of the third plate member 43, flows into the second groove 43c, the through hole 42b of the second plate member 42, and the through hole 41b of the first plate member 41. And is discharged from the through hole 11c of the core holder 11 to a cooling medium discharge pipe (not shown).

  Further, a part of the cooling oil branched through the first groove 42c flows into the internal flow path defined by the inner peripheral surface of the cooling pipe 16, and the outer peripheral surface of the cooling pipe 16 and the cooling pipe insertion hole 12b. By passing through the external flow path defined by the flow path, it flows into the second groove 43c through the cooling medium passage 13g, and passes through the through hole 42b of the second plate member 42 and the through hole 41b of the first plate member 41. The core holder 11 is discharged from a through hole 11c to a cooling medium discharge pipe (not shown).

  Since the cooling block 13 is composed of the three plate members 41, 42, 43, the through holes 41a, 41b, 42a, 42b, 42d, 43a, 43b, 43d formed in the first plate member 41 to the third plate member 43. The cooling medium flow path 13a in the cooling block 13 can be configured by the first groove 42c and the second groove 43c. For this reason, the cooling medium flow path 13a can be easily formed in the cooling block 13, and the manufacturing of the cooling block 13 can be extremely facilitated.

  The mold cooling structure and the mold cooling method according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the cooling oil is supplied from the cooling medium supply pipe, but the present invention is not limited to this. Cooling water may be used.

  In addition, the first main passage is formed so as to cover the first groove 42c formed on the back surface 42B of the second plate member 42 with the surface 41A of the first plate member 41. The groove formed on the front surface may be formed so as to be covered with the back surface of the second plate member, and the groove is formed on both the front surface of the first plate member and the back surface of the second plate member, The surface of the first plate member and the second plate member may be constituted by a space formed by these grooves when they are laminated with each other.

  Similarly, the second main passage is formed so as to cover the second groove 43c formed on the back surface 43B of the third plate member 43 with the surface 42A of the second plate member 42. The groove formed on the front surface of the third plate member may be covered with the back surface of the third plate member, and the groove is formed on both the front surface of the second plate member and the back surface of the third plate member. The surface of the second plate member and the third plate member may be constituted by a space formed by these grooves when they are laminated with each other.

  In the mold cooling structure according to the present embodiment, the cooling medium is supplied from the through hole 11b and the cooling medium is discharged from the through hole 11c. However, the present invention is not limited to this. What is necessary is just to supply a cooling medium from one of the two through-holes 11b and 11c formed in the core die, and to discharge a cooling medium from the other.

  The mold cooling structure according to the present embodiment may be a casting mold other than die casting, or may be an injection mold.

  In the mold cooling structure according to the present embodiment, the cooling block is provided in the cooling block housing part of the slide core, but the cooling block is provided in the cooling block housing part of the fixed mold or the movable mold. Also good. In this case, a cooling block may be provided in one or both of the fixed mold and the movable mold. Further, either one or both of the cooling blocks provided in the fixed mold or the movable mold may be configured by three plate-like members as in the present embodiment.

  In the case of these configurations, as in the present embodiment, a concave portion that follows the shape of the cavity is formed on the back surface of the surface of the fixed die or movable die that defines the cavity, and is formed on the surface of the cooling block. May be provided with a convex portion that can be inserted into the concave portion. By doing so, the cooling medium passage is constituted by a gap formed between the convex portion and the fixed die or the movable die when the convex portion is inserted into the concave portion.

  In the present embodiment, only one convex portion 13D is provided. However, a plurality of convex portions may be provided, and a plurality of cooling medium passages may be formed accordingly. Then, the first groove and the second groove are branched into a plurality of grooves on the back surface of the second plate member and the back surface of the third plate member, respectively, and converge on the cooling medium flow path branched from the supply port and the discharge port. What is necessary is just to make each of the branched groove | channel communicate with the cooling medium channel | path formed in multiple numbers.

  Similarly, a plurality of cooling pipes and cooling pipe insertion holes may be provided. Conventionally, it has been necessary to form a large number of through holes in the core holder, and to insert into each through hole a pipe member for supplying a cooling medium from the outside of the mold. By forming one through hole for supplying a cooling medium and one through hole for discharging a cooling medium and inserting two pipe members into each of them, a total of two cooling mediums are inserted into the cooling medium. Can be supplied at the same time. For this reason, the area of the 1st inclined surface provided in the core holder can be enlarged.

  Further, when the cooling block is not constituted by three plate-like members as in the present embodiment but is constituted by one integral block, the above-described branched first groove and second groove are provided. Instead, the coolant flow path may be formed by branching in the cooling block.

  More specifically, as shown in FIG. 3, the cooling block 13 ′ is formed with a supply port 41a ′ for supplying the cooling medium and a discharge port 41b ′ for discharging the cooling medium, These communicate with a plurality of cooling medium flow paths 13a ′ formed in the cooling block 13 ′. Some of the plurality of cooling medium flow paths 13a ′ branch from the supply port 41a ′, and the other plurality of cooling medium flow paths converge to the discharge port 41b ′.

  The cooling medium flow path 13a ′ communicating with the supply port 41a ′ and the cooling medium flow path 13a ′ communicating with the discharge port 41b ′ are not communicated within the cooling block 13 ′, and the outer peripheral surface of the cooling block 13 ′. And communicate with each other through a plurality of cooling medium passages (not shown) formed in a die (not shown). What is necessary is just to comprise so that the position near the cavity of a metal mold | die may be cooled by supplying a cooling medium from supply port 41a 'and discharging a cooling medium from discharge port 41b'.

  The cooling medium flow path 13a 'is formed as follows. First, the holes 51 to 61 extending linearly in different directions from four or more positions on the outer peripheral surface of the cooling block 13 'are formed. The direction in which the holes 51 to 61 are formed is a direction in which the holes 51 to 61 collide with each other in the cooling block 13 ′ and are connected to each other, and the holes 51 to 61 communicate with each other inside the cooling block 13 ′. All of the holes 51 to 61 are openings serving as supply ports 41a ′ and openings serving as discharge ports 41b ′ among the openings on the surface of the cooling block 13 ′ formed by forming the holes 51 to 61. It communicates with either one of the parts. There is nothing to communicate with both. Among the openings, there are those (43a ', 43b') connected to the cooling medium passage formed in the die, in addition to those serving as the supply port 41a 'and the discharge port 41b'. The other openings 52a, 53a, 56a are plugged with plugs wrapped with sealing tape to prevent the cooling medium from flowing out of the cooling block 13 'through the openings 52a, 53a, 56a. To do. In FIG. 3, ● represents an opening blocked by a plug wound with a sealing tape, and ◯ represents an opening not blocked.

  Further, the cooling block 13 is fixed in the cooling block housing space 12a by sandwiching the cooling block 13 between the core die 12 and the core holder 11, but a through hole is formed in the cooling block, Bolts may be inserted into the through holes and fastened to the core die. Similarly, when the cooling block is fixed in the cooling block housing space of the fixed die or the movable die, the cooling block is fixed by being sandwiched between the fixed die and the fixed holder, or the movable die and the movable holder are fixed. The through holes may be formed in the cooling block, and bolts may be inserted into the through holes and fastened to the fixed die or the movable die.

  The mold cooling structure and mold cooling method of the present invention are extremely useful in the field of die casting, other fields of casting, and fields of injection molding.

The principal part sectional drawing which shows the metal mold | die cooling structure by embodiment of this invention. The principal part sectional drawing which shows the slide core which comprises the metal mold | die cooling structure by embodiment of this invention. Explanatory drawing which shows the cooling block of the metal mold | die cooling structure by the modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slide core 11 Core holder 12 Core die 12a Cooling block accommodation space 12c Concave part 13 and 13 'Cooling block 13D Convex part 13a and 13a' Cooling medium flow path 13f and 13g Cooling medium channel | path 16 Cooling pipe 22 Core die 22b Cooling pipe insertion hole 41 1st plate member 42 2nd plate member 43 3rd plate member 42c 1st groove | channel 43c 2nd groove | channel 41A, 42A, 43A Surface 12B, 41B, 42B, 43B Back surface 41a 'supply port 41b' discharge port 51 ~ 61 holes

Claims (6)

A die having a holder and a die fixed to the holder; the die defines a cavity; a cooling block housing space is formed in the die; and a cooling medium flow path is formed therein. In the mold cooling structure in which the cooling block is housed and fixed in the cooling block housing space,
The cooling block is formed by laminating a first member, a second member, and a third member, and the first member and the second member each have a plate shape having one surface and the other surface. The three members have at least one flat surface, and the second member is laminated on the third member so that the flat surface of the third member and the other surface of the second member face each other. The first member is laminated on the second member such that the one surface of the second member and the other surface of the first member face each other.
A first main passage is formed between the other surface of the first member and the one surface of the second member, and the other surface of the second member and the flat surface of the third member A second main passage is formed between the first main passage and the second main passage through the cooling medium passage formed in the die, and a cooling medium supply is supplied to the first main passage. One of the passage and the discharge passage can be connected, and the other of the cooling medium supply passage and the discharge passage can be connected to the second main passage,
A mold in which a cooling medium is supplied or discharged from the first main passage and a position near the cavity of the mold is cooled by discharging or supplying the cooling medium from the second main passage. Cooling structure. A concave portion that follows the shape of the cavity is formed on the back surface of the die that defines the cavity, and the third member has a convex portion that can be inserted into the concave portion,
2. The mold cooling structure according to claim 1, wherein the cooling medium passage includes a gap formed between the convex portion and the die when the convex portion is inserted into the concave portion. The die is formed with a cooling pipe insertion hole into which a cooling pipe can be inserted, the cooling pipe is inserted into the cooling pipe insertion hole, and an internal flow path is formed inside the cooling pipe, and the cooling pipe and the cooling pipe are inserted. An external flow path is formed between the hole, the internal flow path and the external flow path communicate with each other in the cooling pipe insertion hole, the internal flow path communicates with the first main passage, and the external flow path Communicates with the second main passage,
3. The mold cooling structure according to claim 1, wherein the cooling medium passage is constituted by the cooling pipe insertion hole. The first main passage has a groove formed in at least one of the other surface of the first member and the one surface of the second member, and the other surface of the first member is the second member. Provided by covering the one side of the
The second main passage has a groove formed on at least one of the other surface of the second member and the one surface of the third member, and the other surface of the second member is formed on the third member. The mold cooling structure according to claim 1, wherein the mold cooling structure is provided by covering the one surface. A die having a holder and a die fixed to the holder; the die defines a cavity; a cooling block housing space is formed in the die; and a plurality of cooling medium flow paths are formed therein. A mold cooling structure in which the cooled block is accommodated and fixed in the cooling block accommodation space,
The cooling block has one supply port that communicates with the cooling medium flow channel and supplies the cooling medium flow channel, and one discharge port that communicates with the cooling medium flow channel and discharges the cooling medium. The cooling medium that is formed and some of the plurality of cooling medium flow paths branch from the supply port, and the other cooling medium flow paths converge to the discharge port and communicate with the supply port. The cooling medium flow path communicating with the flow path and the discharge port communicates with each other via a plurality of cooling medium passages formed in the die, and the cooling medium is supplied from the supply port and cooled from the discharge port. A mold cooling structure in which a position near the cavity of the mold is cooled by discharging the medium. A mold cooling method, which is performed using the mold cooling structure according to claim 1.

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