JP5440752B2 - Die casting mold - Google Patents

Description

  The present invention relates to an improvement of a die casting mold.

Conventionally, in a die-casting mold, a movable mold and a sprue core are configured separately, and the sprue core is moved by driving of a driving mechanism and coupled / separated to a sprue bush (for example, Patent Documents). 1). In such a die-casting mold, the pouring system operation can be performed in parallel with the mold system operation, so that productivity can be improved. However, in such a die-casting mold, for example, it is necessary to provide a driving mechanism including a hydraulic cylinder that drives the sprue core and a guide that guides the movement of the sprue core in the die-casting mold or the casting equipment. However, there is a problem that the versatility of the mold and the freedom of design are restricted.
JP 2008-30055 A

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a die casting mold capable of simplifying the structure.

In order to solve the above problems, the die casting mold of the present invention, Supurukoa is a movable type and separately constructed die casting mold, the movable mold and fixed mold, said Supurukoa and said movable mold, and and having said fixed and said Supurukoa, holding mechanism detachably holds the respectively.

According to the die-casting mold of the present invention, the holding mechanism includes, for example, a plurality of first pins that protrude from the surface facing the movable mold of the sprue core, and each of the first pins that are embedded in the movable mold and face each other. A plurality of first bushes that can be fitted to each other, a plurality of second pins that protrude from a surface facing the fixed mold of the sprue core, and a respective second pin that is embedded in the fixed mold and can be inserted and removed. A plurality of second bushes to be fitted can be used.
In the die-casting mold of the present invention, when the die-casting mold is in the mold-clamping state, the first pins and the second pins of the sprue core are the first and second bushes of the movable and fixed molds facing each other. Fitted. After the casting is completed, that is, after the molten metal filled in the cavity of the die casting mold is solidified, the movable mold is moved in the mold opening direction to open the mold. Here, by moving the plunger tip forward following the movable mold opening operation, the sprue core is separated from the fixed mold by the second pins coming out of the second bushes of the fixed mold, and together with the casting biscuits. It can move together with the movable type.
After the cast product is taken out from the mold, the sprue core held by the movable mold is coupled to the tip of the robot arm (operation means), for example, and separated from the movable mold by the operation of the robot arm. Each 2nd pin is inserted in each 2nd bush which opposes. As a result, the sprue core is held by the fixed mold in a state where it is coupled to the opening of the sprue bush, and pouring can be performed. Thus, in the die-casting mold of the present invention, the pouring system operation can be performed in parallel with the mold system operation, and the casting process can be greatly rationalized. Further, since there is no need to provide a mechanism for driving the sprue core in the casting mold or the casting equipment as in the prior art, the structure of the mold can be simplified, and the versatility of the mold and the freedom of design are ensured. be able to.
In the die casting mold of the present invention, the sprue core is joined to the sprue bush by, for example, a spray device (a device including a release agent coating nozzle and an air blow nozzle) after fixing the cast product. It may be the timing of entering between the mold and the movable mold, may be the timing when the application of the release agent to the molding surface of the mold by the spray device is completed, or by the spray device It may be the timing when the air blow is completed and the spray device is withdrawn from between the fixed type and the movable type.
Also, for example, a T-slot (coupling portion) extending from one side surface to the other side surface is provided in the sprue core, and, for example, a T-nut provided at the tip of the robot arm is coupled to the T-slot. Thus, the sprue core can be operated with the robot arm.

  A die casting mold capable of simplifying the structure can be provided.

An embodiment of the present invention will be described with reference to FIGS.
The present embodiment is a die-casting mold in which the sprue core 1 is configured separately from the movable mold 2, and has a holding mechanism that detachably holds the sprue core 1 between the movable mold 2 and the fixed mold 3. The sprue core 1 is fitted into the base 4 that can be accommodated in the sprue core accommodating portion 6 formed on the mold dividing surface 2a of the movable die 2 and the opening (the left end portion in FIGS. 1 to 5) of the sprue bush 7 of the fixed die 3. And a fitting portion 5 that can be mated. The sprue bush 7 is formed in a cylindrical shape, and an end (a right end in FIGS. 1 to 5) opposite to the opening is connected to the injection sleeve 8.

  The injection sleeve 8 is formed in a cylindrical shape whose inner diameter is the same as that of the sprue bush 7, and a plunger tip 9 is slidably fitted on the inner peripheral surface thereof. Also, the plunger tip 9 can reciprocate in the axial direction (the left-right direction in FIGS. 1 to 5) inside the injection sleeve 8 and the sprue bush 7 by driving the injection mechanism. The injection sleeve 8 is provided with a pouring port 10, the plunger tip 9 shown in FIG. 5 is located at the retracted end, and the sprue core 1 is held by the holding mold 3 and held by the ladle. The molten metal pumped up from the furnace is poured into the injection sleeve 8 from the pouring port 10.

The holding mechanism protrudes from the back surface 1a (the surface facing the movable mold 2) of the sprue core 1 and is provided with two first pins 11 arranged at a predetermined interval in the horizontal direction and the movable type 2 sprue core housing. Two first bushes 13 embedded in the respective first pins 11 that are embedded in the portion 6 and the front surface 1b of the sprue core 1 (surface facing the fixed mold 3) are provided so as to protrude in the horizontal direction. Two second pins 12 arranged at a predetermined interval, and two second bushes 14 embedded in the mold dividing surface 3a of the fixed mold 3 and fitted with the opposing second pins 12; Consists of. The sprue core 1 is fitted to the first bushes 13 of the movable mold 2 with the first pins 11 in a state where the die casting mold shown in FIG. 1 is clamped, and the second pins 12 are It fits in each 2nd bush 14 of the fixed mold 3 which opposes.

  As shown in FIG. 3, the holding mechanism is configured such that the base 4 is movable by fitting the first pins 11 to the opposing first bushes 13 in a state where the die casting mold is opened. The sprue core 1 accommodated in the sprue core accommodating portion 6 of the mold 2 can be supported by the movable mold 2. Further, as shown in FIG. 5, the holding mechanism is configured such that each second pin 12 is fitted to each opposing second bush 14 in a state where the die-casting mold is opened, thereby fitting part 5. Can be supported by the fixed mold 3 in a state where the sprue core 1 is fitted in the opening of the sprue bush 7.

  The base portion 4 of the sprue core 1 is provided with a T slot 16 (coupling portion) extending in the left-right direction when the sprue core 1 is viewed from the front. Then, as shown in FIG. 4, a T-nut 18 provided at the tip of the operation robot arm 17 (operation means) is inserted into the T slot 16 of the sprue core 1 to connect the sprue core 1 and the operation robot arm 17. By doing so, the sprue core 1 can be operated (moved) by the operating robot arm 17. Then, by operating the operating robot arm 17, the sprue core 1 held by the movable mold 2 shown in FIG. 3 is moved in the mold closing direction (right direction in FIG. 3) of the movable mold 2, and each first pin 11 can be pulled out from each opposing first bush 13 and the sprue core 1 can be separated from the movable mold 2.

  Further, as shown in FIG. 5, the second pins 12 of the sprue core 1 separated from the movable mold 2 are fitted to the respective second bushes 14 of the fixed mold 3 by operating the operation robot arm, By fitting the fitting portion 5 of the sprue core 1 into the opening of the sprue bush 7, the sprue core 1 can be held by the fixed mold 3.

Next, the operation of the die casting mold of the present embodiment will be described based on the flowchart shown in FIG.
First, the cast product is taken out from the casting mold (step 1). Next, the spray device attached to the robot arm is moved between the movable mold 2 and the fixed mold 3 (step 2), and the mold release agent is applied to the molding surfaces of both molds 2 and 3 by the spray apparatus. (Step 3). Further, both molds 2 and 3 are cleaned by air blow of an air nozzle provided in the spray device (step 4). After the cleaning is completed, the spray device is withdrawn from between the movable mold 2 and the fixed mold 3 (step 5). Next, after inserting the core into the casting mold (step 6), the casting mold is clamped (step 7).

  In the present embodiment, the sprue core 1 is removed from the movable mold 2 by the operation of the operation robot arm 17 at the timing when the removal of the cast product in (Step 1) is completed (Step 8). The removed sprue core 1 is attached to the fixed mold 3 by continuously operating the operation robot arm 17 (step 9). Thereby, as shown in FIG. 1, the fitting portion 5 of the sprue core 1 is fitted into the opening of the sprue bush 7, and the molten metal accommodating portion 15 is interposed between the plunger tip 9 inside the injection sleeve 8 and the sprue core 1. It is formed. Next, the molten metal pumped up from the holding furnace by the ladle is poured from the pouring port 10 of the injection sleeve 8 (step 10).

  Next, the molten metal in the injection sleeve 8 is calmed by the injection delay and the plunger tip 9 is slightly advanced by a predetermined stroke (step 11). In this way, in this embodiment, the pouring system operation of (Step 8) to (Step 11) is a series of mold system operations (Step 2) until the casting is taken out from the casting mold and the mold clamping is completed. It can be performed in parallel with (Step 7). Next, when both the mold clamping of the mold system operation (step 7) and the injection delay of the pouring system operation and the slight advance of the plunger chip 8 (step 11) are completed, the plunger chip 9 is advanced (step 12). ). Thereby, the molten metal inside the injection sleeve 4 is press-fitted and filled into the cavity.

  In this embodiment, since the injection delay of the pouring system operation and the fine advance of the plunger tip 8 (step 11) have already been completed, the injection operation is started at the same time as the mold clamping (step 7) of the mold system operation is completed. can do. Next, the molten metal filled in the cavity is solidified (step 13). After a predetermined time has passed (solidification is completed), the movable mold 2 is moved in the mold opening direction to open the casting mold (step 141). Here, the sprue core 1 can be separated from the fixed mold 3 and moved together with the movable mold 2 together with the cast biscuits by advancing the plunger tip 9 following the mold opening operation of the movable mold 2. (Step 142). After the mold opening is completed, the core is returned (step 15), and the cast product is taken out from the casting mold by the extrusion mechanism (return to step 1).

This embodiment has the following effects.
The die-casting mold of the present embodiment is a first pin 11 that is provided to project from the back surface 1a of the sprue core 1 (the surface facing the movable mold 2), and a first that is embedded in the sprue core housing portion 6 of the movable mold 2 and faces each other. The first bush 13 to which the pin 11 is fitted, the second pin 12 that protrudes from the front surface 1b of the sprue core 1 (the surface facing the fixed mold 3), and the mold dividing surface 3a of the fixed mold 3 are embedded. And a second bushing 14 into which the opposing second pin 12 is fitted.
Therefore, the sprue core 1 held by the movable mold 2 by fitting the first pin 11 to the opposing first bush 13 is moved to the operation robot arm 17 (operation means) at the timing when the casting product is completely removed. By detaching from the movable mold 2 by operation and attaching to the fixed mold 3, the fitting portion 5 of the sprue core 1 is fitted into the opening of the sprue bush 7 so that the plunger tip 9 inside the injection sleeve 8 and the sprue core 1 are interposed. The molten metal accommodating part 15 can be formed.
According to this embodiment, it becomes possible to pour molten metal into the injection sleeve 8 in parallel with the mold system operation, and the injection operation can be started immediately after the mold clamping is completed. This makes it possible to significantly reduce the time required for pouring as compared with a die casting mold in which the conventional sprue core 1 is formed integrally with the movable mold 2, thereby streamlining the die casting manufacturing process. it can.
Further, in order to replace the sprue core 1 between the movable die 2 and the fixed die 3, for example, it is not necessary to provide a sprue core driving mechanism constituted by a hydraulic cylinder and a guide in a die casting mold or a casting facility. The structure can be simplified and the versatility of the mold and the freedom of design can be secured.

In addition, embodiment is not limited above, For example, you may comprise as follows.
In the present embodiment, the first pin 11 that protrudes from the back surface 1a of the sprue core 1 (the surface facing the movable mold 2) and the first pin 11 that is embedded in the sprue core accommodating portion 6 of the movable mold 2 and faces each other are fitted. The first bush 13 to be joined, the second pin 12 protruding from the front surface 1b of the sprue core 1 (the surface facing the fixed mold 3), and the second opposed and embedded in the mold dividing surface 3a of the fixed mold 3. Although the holding mechanism is configured by the second bush 14 to which the pin 12 is fitted, the sprue core 1 can be replaced between the movable mold 2 and the fixed mold 3 by the operation of the operation robot arm 17 (operation means). On the condition that it is possible, for example, the holding mechanism can be configured using a coupling or the like.
The plurality of first and second pins 11 and 12 and the first and second bushes 13 and 14 are provided in order to prevent rotation when the sprue core 1 is held. Each of the first and second pins 11 and 12 and the first and second bushes 13 and 14 may be singular if rotation of the sprue core 1 can be prevented by the joint portion 5. Further, the first and second pins 11 and 12 and the first and second bushes 13 and 14 are fitted to the spigot shape provided on the sprue core 1 itself and the spigot shapes provided on the movable mold 2 and the fixed mold 3 respectively. It can be. Further, the holding mechanism is configured by arranging the first pin 11 (or the first bush 13) and the second pin 12 (or the second bush 14) at a predetermined interval in the horizontal direction. However, the holding mechanism is not necessarily in the horizontal direction. There is no need to arrange, and the arrangement is a design matter that can be set as appropriate.
Further, the mechanism for coupling the sprue core 1 and the operating robot arm 17 is not limited to the coupling of the T slot 16 and the T nut 18 but is a design matter that can be set as appropriate.

It is explanatory drawing of this embodiment, and is sectional drawing of a part of die-casting casting die which shows the state clamped especially. It is explanatory drawing of this embodiment, and is especially sectional drawing of a part of die-casting type | mold which shows the state which is following the movable type | mold mold opening operation | movement and the plunger tip is advanced. It is explanatory drawing of this embodiment, and is especially sectional drawing of a part of die-casting type | mold which shows the state by which the sprue core was hold | maintained at the movable type | mold. It is explanatory drawing of this embodiment, and is especially sectional drawing of a part of die-casting type | mold which shows the state which is moving the sprue core from a movable type | mold by operation of the robot arm for operation. It is explanatory drawing of this embodiment, and is sectional drawing of a part of die-casting casting die which shows the state by which the sprue core was hold | maintained at the fixed die especially. It is a flowchart figure of the casting process at the time of using the die-casting die of this embodiment.

Explanation of symbols

1 sprue core, 2 movable type, 3 fixed type, 4 base part, 5 fitting part, 9 plunger tip, 11 first pin (holding mechanism), 12 second pin (holding mechanism), 13 first bush (holding mechanism), 14 Second bush (holding mechanism), 16 T slot (connecting portion), 17 Robot arm for operation (operation means)

Claims (4)

A die casting mold in which the sprue core is configured separately from the movable mold,
The movable type and the fixed type are:
Die casting mold, characterized in that it comprises said Supurukoa said movable die, and the Supurukoa and said fixed detachably holding the holding mechanism to the respectively. The holding mechanism is
A first pin provided to protrude from the surface of the sprue core facing the movable mold;
A first bushing embedded in the movable mold so that the first pin can be inserted and removed; and
A second pin provided protruding from the surface of the sprue core facing the fixed mold;
A second bushing embedded in the fixed mold so that the second pin can be inserted and removed; and
The die-casting mold according to claim 1, wherein 3. The sprue core is separated from the fixed mold and moves integrally with the movable mold when the plunger tip moves forward following the mold opening operation of the movable mold. 4. Die casting mold. The die-casting die according to any one of claims 1 to 3, wherein the sprue core has a coupling portion to which operating means for operating the sprue core is detachably coupled.

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