JPH0331476Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vertical die-casting machine, and more specifically, the invention includes a lower mold having a first product extrusion mechanism and an injection plunger, a second product extrusion mechanism and a product support member. A cavity is defined by the upper mold and the horizontal mold positioned by the positioning pin, and
The present invention also relates to a vertical die-casting machine capable of easily taking out a product from a cavity without damaging it under the action of a second product extrusion mechanism and the injection plunger.

2. Description of the Related Art There is a vertical die casting machine that presses molten metal into a cavity defined between a lower die and an upper die using an injection plunger to form a product. This vertical die-casting machine is usually equipped with a product extrusion mechanism to release the product from the mold, and after the mold is opened, this mechanism is activated to eject the product from the cavity (lower mold). .

Therefore, FIG. 1 shows a preferred example of the main parts of a mold in a vertical die-casting machine according to the prior art. That is, a fixed lower mold 6 having a male mold 4 is fixed to the upper surface of a fixed die plate 2 fixed to the main body side of a vertical die casting machine, and the fixed lower mold 6 moves toward the fixed lower mold 6. A movable upper die 12 having a female die 10 is fixed to the lower surface of the movable die plate 8 . In this case, the fixed lower mold 6 and the movable upper mold 12
By joining these, a cavity for forming the product 14 is defined between the male die 4 and the female die 10.

On the other hand, first and second injection sleeves 16 and 18 are fitted into the fixed die plate 2 and the fixed lower mold 6 in a connected state. An injection plunger 22 that moves in the direction is slidably inserted. Then, the fixed lower mold 6 and the movable upper mold 12 are clamped, and the injection sleeve 1 is
After feeding molten metal into 6 and 18, the injection cylinder 2
By moving the injection plunger 22 upward under the driving action of 0, the molten metal is press-fitted into the cavity.

Next, after the molten metal press-fitted into the cavity is cooled and solidified, the movable upper mold 12 is moved to the movable die plate 8.
The mold is opened by moving the mold upward with the product 14.
Take it out from the cavity. That is, the fixed lower die 6 is provided with a product extrusion mechanism that causes the extrusion pins 28a to 28c to protrude onto the surface of the male die 4 via the extrusion plate 26 under the action of the extrusion cylinder 24.
Therefore, the product 14 is released from the male mold 4 by the upward movement of the ejection pins 28a to 28c and the injection plunger 22. In this case, the operations of the injection cylinder 20 and the extrusion cylinder 24 are synchronized by a flow rate regulating valve 30.

Next, the product 14 released from the male mold 4 is held in a gripping device 3 having a chuck mechanism such as a robot hand.
2 grips a predetermined portion of the product 14 and takes it out from the mold.

By the way, in the vertical die-casting machine that takes out the product 14 as described above, there is a risk that the product 14 may be damaged during extrusion. That is, when releasing the product 14 from the male mold 4,
The operations of the injection cylinder 20 and the extrusion cylinder 24 are controlled by a flow regulating valve 30 to synchronize the movement speed of the injection plunger 22 and the movement speed of the ejection pins 28a to 28c. However, it is not possible to completely synchronize the moving speeds by means of the flow regulating valve 30, and therefore a portion of the product 14 adjacent to the runner portion formed in the second injection sleeve 18 may break. This may cause the inconvenience of bending or damage. In some cases, product 1
Due to the excessive pressure generated between the male die 4 and the runner section, there is a possibility that an overload is applied to a part of the male die 4 and the male die 4 is damaged.

Furthermore, such a vertical die-casting machine must be equipped with a dedicated gripping device 32 for gripping a part of the product 14 and taking it out of the mold, which has been pointed out to be an extremely expensive equipment. There is.

The present invention has been made to overcome the above-mentioned disadvantages, and includes a lower mold having a first product extrusion mechanism and an injection plunger for pushing up the product, and a second product extrusion mechanism for pushing the product down. An upper mold having a mechanism and a product support member, a product support member, a horizontal mold positioned by a positioning pin, and a cavity are defined, and a first product is extruded with the product supported by the upper mold. A mold from which a product can be easily taken out without damaging the product with an extremely simple configuration by pushing up the product using a mechanism and an injection plunger, and then pushing the product down using a second product extrusion mechanism to take out the product. The purpose of the present invention is to provide a vertical die-casting machine having the following features.

In order to achieve the above object, the present invention comprises: a fixed lower mold fixed to a fixed die plate and defining a part of the cavity; an injection plunger for injecting molten metal into the cavity through the fixed lower mold; a first extrusion mechanism that pushes out a product formed in the cavity upward through the fixed lower mold; and a first extrusion mechanism that is connected to a movable die plate and moves integrally with the movable die plate toward the fixed lower mold. a movable upper mold that defines a part of the cavity; a second extrusion mechanism that pushes the product formed in the cavity downward through the movable upper mold; the fixed lower mold and the movable upper mold. a horizontal mold that moves laterally relative to the movable upper mold and defines a part of the cavity together with the fixed lower mold and the movable upper mold; and a horizontal mold that is provided on the movable upper mold side and is displaced integrally with the movable upper mold; and a support member that defines a part of the cavity and holds and guides the product; and a positioning pin that passes through the movable upper mold and positions the horizontal mold with respect to the fixed lower mold and the movable upper mold. The support member is configured to support the support member until the horizontal mold retracts to open the cavity, the movable upper mold moves up, and the product is separated from the fixed lower mold by the first extrusion mechanism on the fixed lower mold side. It is characterized by holding the product on the moving upper mold side.

Next, preferred embodiments of the vertical die-casting machine according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 5, reference numeral 40 indicates the main body of the vertical die casting machine according to the present invention. The main body 40 has a fixed die plate 42 fixed to a frame (not shown), and a bolster 46 having a first injection sleeve 44 is fixed to the upper surface of the fixed die plate 42. Bolster 46
A fixed lower mold 52 having a second injection sleeve 48 and a male mold 50 formed on the upper surface thereof is fixed. In this case, the second injection sleeve 48 engages with the first injection sleeve 44, and an injection plunger 56, which is moved vertically by an injection cylinder (not shown), is slidably fitted inside the second injection sleeve 48 via a rod 54. .

A first product extrusion mechanism 5 is provided at the bottom of the fixed lower die 52.
8 are arranged. The first product extrusion mechanism 58 includes an extrusion plate 62 that is moved vertically via a rod 60 by an extrusion cylinder (not shown), a presser plate 66 that is fixed to the upper surface of this extrusion plate 62 by a fixing screw 64, and It consists of extrusion pins 68a and 68b whose lower ends engage with the presser plate 66 and whose upper ends face the surface of the male mold 50 via the fixed lower mold 52 in a slidable manner.

On the other hand, horizontal molds 72a and 72b are disposed on the upper surface of the fixed lower mold 52 and are movable laterally via rods 70a and 70b by moving means (not shown). Incidentally, tapered holes 74a and 74b that gradually become narrower toward the fixed lower mold 52 are formed in the upper surfaces of the horizontal molds 72a and 72b.

A first movable upper mold 76 that is movable in the vertical direction along a frame (not shown) is disposed on the upper surface of the horizontal molds 72a and 72b. A product guide member 78 that protrudes toward the male mold 50 of the fixed lower mold 52 is fitted into the center of the first movable upper mold 76 . In this case, the male mold 50 of the fixed lower mold 52, the horizontal molds 72a, 72
b. A cavity for forming the product 80 is defined by the first movable upper mold 76 and the product guide member 78 as a support member. A biscuit portion 82 formed within the second injection sleeve 48 is connected to the product 80 formed in the cavity.

The first movable upper mold 76 includes the horizontal molds 72a and 72b.
The hole 8 is directed toward the holes 74a and 74b formed in the
4a and 84b are drilled, respectively, and these holes 84
Positioning pins 86 and 88 are inserted into a and 84b. The positioning pins 86 and 88 are connected to the horizontal type 72.
It has tapered lower ends 86a and 88a that engage with holes 74a and 74b formed in holes 74a and 72b,
Further, each intermediate portion includes a flange-shaped upper end portion 86b,
Step portions 86c and 88c are formed with a smaller diameter on the 88b side.

A presser plate 92 is fixed to the upper surface of the first movable upper mold 76 by fixing screws 90, and the positioning pins 8 are attached to the presser plate 92 via bushes 94 and 96.
6 and 88 are inserted. In this case, the stepped portions 86c, 8 formed on the positioning pins 86, 88
8c is configured to be locked by the lower surface portions of the bushes 94, 96.

A second movable upper mold 98 is in contact with the upper surface of the presser plate 92, and a movable die plate 100 that is movable in the vertical direction along a frame (not shown) is fixed to the upper surface of the second movable upper mold 98. . In this case, the upper ends 86b, 88b of the positioning pins 86, 88
engages with the second movable upper mold 98.

Furthermore, a second product extrusion mechanism 102 is disposed above the presser plate 92. Second product extrusion mechanism 10
2 is a rod 104 by an extrusion cylinder (not shown).
a push-out plate 106 that moves in the vertical direction via the push-out plate 106;
The upper end portion is engaged with the presser plate 92 and the lower end portion is engaged with the presser plate 92 and the first
Extrusion pins 112a, 112 facing the lower surface of the first movable upper mold 76 via the movable upper mold 76 in a freely sliding manner
It consists of b.

The vertical die-casting machine according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

When casting the product 80, the extrusion pins 68a, 68b and the injection plunger 56 constituting the first product extrusion mechanism 58 are withdrawn downward from the fixed lower die 52 by a cylinder (not shown) via the rods 60, 54. Second product extrusion mechanism 102
The ejection pins 112a and 112b constituting the mold are withdrawn upward from the first movable upper mold 76 via the rod 104. Next, a horizontal mold 7 is placed on the upper surface of the fixed lower mold 52.
2a and 72b, and then the horizontal mold 72
The first movable upper mold 76 is placed on the upper surface of the upper surface of the upper surface of the movable die plate 100 and the second movable upper mold 98.
are brought into contact and the mold is clamped. As a result, the fixed lower mold 52
male mold 50, horizontal molds 72a, 72b, and movable upper mold 76
A cavity for forming a product 80 is defined by a product guide member 78 attached to the central portion of the product guide member 78 . Note that the positioning pins 86 and 88 have their upper ends 86b and 88b pressed downward by the movable die plate 100, and their lower ends 86a and 88a.
Holes 74a, 7 formed in horizontal molds 72a, 72b
4b. Therefore, the horizontal molds 72a and 72b are accurately positioned with respect to the fixed lower mold 52 and the first movable upper mold 76.

After the mold is clamped as described above, molten metal is supplied into the first and second injection sleeves 44 and 48, and the injection plunger 56 is moved upwardly via the rod 54 under the driving action of an injection cylinder (not shown). move it. In this case, the molten metal is press-fitted into a cavity defined by the male mold 50, the horizontal molds 72a and 72b, the first movable upper mold 76, and the product guide member 78, and is cooled and solidified to form the product 80.
is formed. The state at this time is shown in FIG. Here, the product 80 is contained in the second injection sleeve 48.
A biscuit portion 82 is formed continuously.

After the molten metal is completely cooled and solidified, the movable die plate 100 and the second movable upper die 98 are raised along a frame (not shown). In this case, the second
The positioning pins 86 and 88 whose upper ends 86b and 88b are engaged with the movable upper mold 98 are connected to the movable die plate 10.
0, and the lower ends 86a, 88a are extracted from the holes 74a, 74b of the horizontal molds 72a, 72b. Therefore, the horizontal type 72 is moved through the rods 70a and 70b under the driving action of a moving means (not shown).
a, 72b in the lateral direction (see FIG. 3).

Next, from the state shown in FIG. 3, the first product extrusion mechanism 58
The extrusion pins 68a, 68b and the injection plunger 56 constituting the die plate 1 are moved upward under the driving action of a cylinder (not shown), and the movable die plate 1
Move 00 upward. In this case, product 80
is an extrusion pin 68 protruding from the surface of the male die 50.
The biscuit part 82 connected to the product 80 is also pushed upward by the injection plunger 56. As a result, the product 80 and the biscuit part 82 are released from the fixed lower mold 52 and are pushed upward together with the first movable upper mold 76. The state at this time is shown in FIG. Here, since the upper surface of the product 80 is supported by the first movable upper die 76 and the product guide member 78, for example, the rising speed of the ejection pins 68a, 68b and the rising speed of the injection plunger 56 are different. Even in the case of not being accurately synchronized, the part of the product 80 near the biscuit portion 82 is not bent or damaged, and the extrusion operation is performed extremely well.

When the product 80 is completely released from the fixed lower mold 52, the ejection pins 68a, 68b and the injection plunger 56 are moved downward, and as shown in FIG. Insert the palette 114 that makes up the . Subsequently, the rod 104 and the extrusion plate 10 are driven under the driving action of an extrusion cylinder (not shown) constituting the second product extrusion mechanism 102.
6, the push-out pins 112a and 112b are moved downward. In this case, the first movable upper mold 76 is moved through the positioning pins 86 and 8 through the bushes 94 and 96.
It is locked to step portions 86c and 88c of No.8. Therefore, the upper surface of the product 80 is
112b by the lower end of said product 8
0 falls onto pallet 114. The state at this time is shown in FIG. In this case, there is no need to use a gripping device or the like when releasing the product, and the configuration becomes extremely simple. Note that the pallet 114 can be taken out from between the molds and transferred to a predetermined location without gripping the product 80.

As described above, according to the present invention, there is provided a lower mold having an injection plunger, a first product extrusion mechanism that extrudes the product upward, a second product extrusion mechanism that extrudes the product downward, and a support for the product. A mold is constituted by an upper mold having a member and a horizontal mold positioned by a positioning pin, and the product is pushed upward by an injection plunger and a first product extrusion mechanism while being supported by the upper mold. After that, the product is extruded downward by a second product extrusion mechanism and taken out from the mold. Therefore, the product can be taken out without strictly synchronizing the moving speeds of the injection plunger and the first product extrusion mechanism, and there is no possibility that a part of the product may be bent or damaged. do not have. Moreover, since the product pushed upward by the first product extrusion mechanism is dropped downward by the second product extrusion mechanism, the work to take out the product is also extremely easy. In other words, it is only necessary to place a tray such as a pallet at the bottom of the product for the extraction operation, there is no need to use a gripping device with a chuck mechanism as in the past, and the overall configuration of the vertical die-casting machine is simplified. The effect of being extremely simple can be obtained.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram showing the main body of a vertical die-casting machine according to the prior art, and FIGS. 2 to 5 are cross-sectional explanatory diagrams showing various operating states of the main body of the vertical die-casting machine according to the present invention. be. 40...Main body part, 42...Fixed die plate,
44... Injection sleeve, 46... Bolster, 48
...Injection sleeve, 52...Fixed lower mold, 56...
Plunger, 58...Product extrusion mechanism, 68a, 6
8b...Extrusion pin, 72a, 72b...Horizontal type, 7
6...Moving upper mold, 78...Product guide member, 80
...Product, 82...Biscuit part, 86, 88...
...Positioning pin, 98...Movable upper mold, 100...
Moving die plate, 102...Product extrusion mechanism, 1
12a, 112b...Extrusion pin, 114...Pallet.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed lower mold fixed to a fixed die plate and defining a part of the cavity, and an injection plunger that presses molten metal into the cavity via the front-filling fixed lower mold; A first extrusion mechanism that pushes out a product formed in the cavity upward through a fixed lower mold; and a first extrusion mechanism that is connected to a movable die plate and moves integrally with the movable die plate toward the fixed lower mold. , a movable upper mold that defines a part of the cavity; a second extrusion mechanism that pushes the product formed in the cavity downward through the movable upper mold; and a movable upper mold that defines a part of the cavity; a horizontal mold that moves laterally relative to the fixed lower mold and defines a part of the cavity together with the fixed lower mold and the movable upper mold; and a horizontal mold that is provided on the movable upper mold side and is integrally displaced with the movable upper mold; , comprising a support member that defines a part of the cavity and holds and guides the product, and a positioning pin that passes through the movable upper mold and positions the horizontal mold with respect to the fixed lower mold and the movable upper mold. , the supporting member is configured such that the horizontal mold retracts to open the cavity, and then, as the movable upper mold moves up,
A vertical die-casting machine characterized in that the product is held on the movable upper mold side until the product is detached from the fixed lower mold by a first extrusion mechanism on the fixed lower mold side. (2) In the die-casting machine according to claim 1, the positioning pin slides along the movable upper mold and is connected to a first engaging portion that engages with the movable upper mold and a horizontal mold. and a second engaging portion that engages with the vertical die casting machine.