JP2012240100A - Gate part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate part structure capable of supplying molten metal into a cavity evenly without deviation in the directions in which the molten metal flows into the cavity and capable of improving filling balance into the cavity.SOLUTION: The gate part structure of a gate part through which molten metal from a runner part flows into a cavity, as a product part provided between a fixed die and a movable die is characterized in that the gate part includes: a first opening through which molten metal is caused to flow into the cavity in a first direction; and a second opening which is communicated with the first opening and through which molten metal is caused to flow into the cavity in a second direction, wherein the molten metal flowing into the cavity from the gate part is guided in a plurality of directions.

Description

  The present invention relates to die-casting, and relates to a gate part structure that flows molten metal into a cavity.

  Conventionally, there exist some which were described in patent document 1 as die-cast machines, such as aluminum alloy.

  In this die casting machine, a fixed mold and a movable mold are provided between a pair of opposed fixed platens and a movable platen, and an extrusion plate and an extrusion pin are incorporated in the movable mold. When these fixed molds and movable molds come close to each other, a molten metal such as aluminum is injected and filled into a product part (cavity) formed between the fixed molds and the movable molds to produce a cast molded product. The Such a die-cast machine is provided with an injection cylinder for injecting molten aluminum, and a fixed mold is provided with a sleeve for storing molten aluminum. The sleeve is fitted into a hole provided in the fixed mold to form a hot water storage chamber, and further communicates with the product portion through a runner and a gate.

JP2008-246503

  However, in the prior art, when the molten metal is injected into the product portion (cavity), the direction of injection / filling from the gate is one direction, so the flow direction of the molten metal injected into the product portion is biased in a certain direction. There was a problem.

  Thus, since the flow direction of the molten metal into the product part is biased in a certain direction, the molten metal cannot be uniformly filled into the product part, and the balance of the molten metal into the product part is deteriorated due to the product shape. was there.

  Accordingly, the present invention provides a gate portion structure in which there is no deviation in the inflow direction of the molten metal into the cavity, the molten metal can be supplied uniformly into the cavity, and the filling balance into the cavity can be improved. It is intended to provide.

  In order to solve the above problems, the present invention is a gate part structure of a gate part in which molten metal from a runner part flows into a cavity as a product part provided between a fixed mold and a movable mold, The gate portion communicates with the first opening to allow the molten metal to flow in the first direction into the cavity, and allows the molten metal to flow into the cavity in the second direction. A second opening, and guides the molten metal flowing from the gate portion into the cavity in a plurality of directions.

  Invention of Claim 2 is the gate part structure of Claim 1, Comprising: The said runner part is a runner base, the 1st flow path extended from this runner base, and the runner base from The first flow path and the second flow path extending in the parallel direction with respect to the first flow path and communicating with the first flow path, and the first flow path. An opening is provided at the tip of the first channel, and the second opening is provided at the tip of the second channel.

  The invention according to claim 3 is the gate portion structure according to claim 2, wherein the first opening and the second opening are shifted from each other in a direction orthogonal to the parallel direction. It is characterized by that.

  Invention of Claim 4 is the gate part structure in any one of Claims 1-3, Comprising: The said cavity is a bottomed cylindrical shape, The said gate part is provided in the center position of the said cavity. It is characterized by.

  The invention according to claim 5 is the gate portion structure according to any one of claims 1 to 4, wherein the gate portion structure communicates with the second opening and the opposite side of the first opening and enters the cavity. A third opening for allowing the molten metal to flow in the first direction is provided.

  The present invention provides a first opening through which the molten metal flows into the cavity in the first direction, and a second opening that communicates with the first opening and into the cavity toward the second direction. In addition, the molten metal flowing into the cavity from the gate portion is guided in a plurality of directions, so that there is no deviation in the flowing direction of the molten metal into the cavity and the molten metal is uniformly distributed in the cavity. Thus, the filling balance into the cavity can be improved.

Simplified sectional view of die-cast. (A) The enlarged top view of a runner part and a gate part, (b) The expansion perspective view of a runner part and a gate part. (A) CC sectional view of FIG. 2 (a), (b) DD sectional view of FIG. 2 (a), (c) EE sectional view of FIG. 2 (a). (D) FF cross section arrow view of FIG. 2 (a), (e) HH cross section arrow view of FIG. 2 (a), (f) GG cross section arrow view of FIG. 2 (a). Figure. The figure which shows the flow of the molten metal in the cavity of this invention. (A) The enlarged top view of the runner part and gate part of other embodiment, (b) The II sectional view taken on the line of Fig.5 (a).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The gate part structure 1 of the first embodiment includes a cavity 4 as a product part provided between the fixed mold 2 and the movable mold 3, an inlet that is provided in communication with the cavity 4 and flows molten metal into the cavity 4. And a runner portion 7 which is provided in communication with the gate portion 5 and flows into the gate portion 5 with the molten metal pushed out from the sleeve 6.

  In the gate part structure 1 of the present embodiment, the gate part 5 is communicated with the first opening 13 through which the molten metal flows into the cavity 4 in the first direction a, and the first opening 13. And a second opening 14 through which the molten metal flows into the cavity 4 in the second direction b, and guides the molten metal flowing from the gate 5 into the cavity 4 in a plurality of directions.

  As shown in FIG. 1, a die used for die casting includes a fixed mold 2, a movable mold 3 that is arranged opposite to one surface side of the fixed mold 2, and that is in contact with and away from the fixed mold 2 direction. A cylindrical sleeve 6 disposed on the other surface side and a hydraulic cylinder 8 for pushing out the molten metal injected into the sleeve 6 are configured.

  The movable mold 3 is formed of a cavity 4 having a shape (in this embodiment, a bottomed cylindrical shape) for molding a desired product with the fixed mold 2 and a molten metal flowing out of the cavity 4. An overflow part 9 is provided. Further, the movable mold 3 is provided with an eject pin hole 10 so as to communicate with the overflow portion 9 and the cavity 4, respectively, and an eject pin 11 for taking out the molten metal pressurized in the cavity 4 and the overflow portion 9 from the movable mold 3. Is inserted. Further, a gas vent hole 12 is provided in the vicinity of the overflow portion 9. The gas vent hole 12 discharges air or the like that has entered the molten metal pressurized between the movable mold 3 and the fixed mold 2. doing.

  The fixed mold 2 is provided continuously with a cavity 4 and a cavity 4 having a shape (in this embodiment, a bottomed cylindrical shape) for molding a desired product with the movable mold 3. The gate portion 5 serves as an inlet through which the molten metal flows, and a runner portion 7 flows the molten metal pushed out from a sleeve 6 provided in communication with the gate portion 5 into the gate portion 5.

  As shown in FIG. 2, the runner portion 7 includes a runner base portion 7a into which the molten metal pushed out from the sleeve 6 by the hydraulic cylinder 8 flows, a first flow path 7b extending from the runner base portion 7a, and a runner base portion 7a. To the first flow path 7b in the same direction as the first flow path 7b. The second flow path 7c extends from the first flow path 7b and gradually shifts in parallel with the first flow path and communicates with the first flow path. Yes.

  Further, as shown in FIGS. 2A and 2B and FIGS. 3A to 3D, the first flow path 7b and the second flow path 7c are arranged in the vertical direction in the figure.

  The cross-sectional areas of the runner base 7a, the first flow path 7b, and the second flow path 7c are substantially the same, or the first flow path 7b and the second flow path 7c are larger. Is desirable.

  The gate portion 5 provided at the tip of the runner portion 7 includes a first opening 13 for flowing the molten metal into the cavity 4 on one end side, a first opening 13 communicating with the first opening 13 and flowing the molten metal into the cavity 4. 2, and the other end side is disposed in communication with the center position of the cavity 4.

  As shown in FIG. 3E, the first opening 13 and the first flow path 7b are continuously provided between the first opening 13 and the first flow path 7b. In addition, a first throttle portion 15 is formed that regulates the direction of the molten metal flowing from the gate portion 5 into the cavity 4. The first restricting portion 15 regulates the direction a of the molten metal flowing from the runner portion 7 into the cavity 4 by the first restricting portion 15.

  In addition, as shown in FIG. 3 (f), the second opening 14 and the second flow path 7c are also continuous between the second opening 14 and the second flow path 7c. And a second throttle part that regulates the direction of the molten metal flowing into the cavity 4 from the second opening 14 so as to intersect the direction of the molten metal flowing into the cavity 4 from the first throttle part 15. 16 is provided. Similarly to the first throttle part 15, the second throttle part 16 also regulates the direction b of the molten metal flowing into the cavity 4 by the first throttle part 15 by the molten metal flowing in from the runner part 7. .

  Thus, the molten metal flowing from the first opening 13 and the second opening 14 into the cavity 4 in a plurality of directions makes the molten metal from the gate portion 5 communicated with the center position of the cavity 4. Since the molten metal flows in the first opening 13 downward in the figure and the second opening 14 in the upward direction in the figure, there is no bias in the flowing direction of the molten metal into the cavity 4. As shown in FIG. 4, the molten metal can be supplied uniformly from the center of the cavity 4, and the filling balance of the molten metal into the cavity 4 can be improved.

  Further, the direction of the molten metal flowing into the cavity 4 can be appropriately changed depending on the shapes of the first throttle portion 15 and the second throttle portion 16.

  A second embodiment of the present invention will be described with reference to FIG. The description of the same configuration as that of the first embodiment is omitted.

  As shown in FIG. 5 (a), the gate part structure 100 of this embodiment includes a runner base 70a, a first flow path 70b extending from the runner base 70a, and a first flow path from the runner base 70a. 70 b extending in the parallel direction with respect to the first flow path 70 b in the same direction as the first flow path 70 b and communicating with the first flow path 70 b, and the runner base 70 a to the first flow path A third flow path 70d extending in a parallel direction with respect to the flow path 70b or the second flow path 70c and communicating with the first flow path 70b or the second flow path 70c; It has become.

  A first opening 130 is provided at the tip of the first flow path 70b, and the flow direction of the molten metal flowing into the cavity 4 is between the first opening 130 and the first flow path 70b. There is provided a first diaphragm 160 that regulates the above. In addition, a second opening 140 is provided at the tip of the second flow path 70c, and the molten metal flowing into the cavity 4 is interposed between the second opening 140 and the second flow path 70c. A second restricting portion 170 that restricts the flowing direction to a direction intersecting the first restricting portion 160 is provided.

  A third opening 150 is provided at the tip of the third flow path 70d, communicates with the second opening 140 on the opposite side of the first opening 130, and passes through the cavity 4 from the first opening 130. A third restrictor 180 is provided for restricting the flow of the molten metal in the same direction as the molten metal flowing into the cavity 4, and the molten metal flows into the cavity 4 in the same direction as the first opening 130.

  Also in the second embodiment, the center position of the cavity 4 is obtained by setting the directions of the molten metal flowing into the cavity 4 from the first opening 130, the second opening 140, and the third opening 150 into a plurality of directions. The molten metal flows in from the gate portion 50 communicated with the gas, and there is no deviation in the flowing direction of the molten metal into the cavity 4, and the molten metal can be supplied more uniformly into the cavity 4. Balance can be improved.

  In the present embodiment, the first opening and the second opening are provided in a shifted manner, but only the first opening may be provided. In this case, a throttle portion that guides the flow direction of the molten metal into the cavity in a plurality of directions may be provided in the first opening.

  In the above embodiment, the case where a cylindrical product is molded has been described, but the present invention that guides the flow direction of the molten metal in a plurality of directions can be used even in the case of other shapes. In this case, a plurality of openings may be provided so as to evenly flow into the molten metal cavity.

  The present invention can be used for other injection molding gate portions such as resin molding in addition to die casting.

DESCRIPTION OF SYMBOLS 1 Gate part structure 2 Fixed type | mold 3 Movable type | mold 4 Cavity 5 Gate part 7 Runner part 13 1st opening part 14 2nd opening part

Claims (5)

Gate part structure (1) of the gate part (5) in which the molten metal from the runner part (7) flows into the cavity (4) as the product part provided between the fixed mold (2) and the movable mold (3) ) And
The gate part (5) communicates with the first opening (13) and the first opening (13) through which the molten metal flows into the cavity (4) in the first direction, and the cavity. (4) including a second opening (14) for allowing the molten metal to flow in the second direction,
A gate part structure (1) characterized in that the molten metal flowing into the cavity (4) from the gate part (5) is guided in a plurality of directions. The gate part structure (1) according to claim 1,
The runner portion (7) includes a runner base portion (7a), a first flow path (7b) extending from the runner base portion (7a), and a first flow path (7b) extending from the runner base portion (7a). And a second channel (7c) extending in a parallel direction with respect to the first channel (7b) and communicating with the first channel (7b). ,
The first opening (13) is provided at the tip of the first channel (7b), and the second opening (14) is provided at the tip of the second channel (7c). A gate part structure (1) characterized in that The gate part structure (1) according to claim 2,
The gate structure (1), wherein the first opening (13) and the second opening (14) are displaced from each other in a direction orthogonal to the parallel direction. The gate part structure (1) according to any one of claims 1 to 3,
The gate part structure (1), wherein the cavity (4) has a bottomed cylindrical shape, and the gate part (5) is provided at a central position of the cavity (4). A gate part structure (100) according to any of claims 1-4,
The third opening (150) that communicates with the second opening (140) on the opposite side of the first opening (130) and allows the molten metal to flow into the cavity (4) in the first direction. ) Is provided. A gate structure (100).

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