JP3002675U - Vertical zinc die casting machine - Google Patents

Abstract

(57) [Summary] [Purpose] Not only high-quality zinc die-cast products with clean surfaces without bubbles but also products with inserts can be safely and stably manufactured under a good working environment.
Provide vertical zinc die casting machine with high energy efficiency. [Structure] An upper die attached to a vertically movable upper die plate driven by a die clamping hydraulic cylinder, and a cavity formed by contacting the upper die with the upper die, and a product formed in the cavity is formed by an extrusion hydraulic cylinder. A vertical zinc die casting machine equipped with a lower die that has an extrusion mechanism that pushes out with an extrusion rod through a lower die plate, and a zinc melt injection device that melts zinc and press-fits it into the cavity from its lateral injection port. is there. The lower die is mounted on a lower die plate that can be moved laterally along a guide by a hydraulic cylinder, and the zinc melt injection device is arranged adjacent to the lower die moving opposite side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vertical zinc die casting machine capable of safely and stably producing zinc die casting products including inserts.

[0002]

[Prior art]

 As a die casting machine for zinc or the like, a horizontal die casting machine having a configuration shown in FIG. 3 is generally known.

That is, the known horizontal die casting machine shown in FIG. 3 has a movable die 60 attached to a laterally movable die plate 59 driven by a die clamping hydraulic cylinder (not shown), and the movable die 60. A fixed die plate 56 which is attached to the fixed die 57 to form a cavity 61, and a zinc melt injection device which press-fits the molten zinc 51 into the cavity 61 from the bottom of the fixed die 57 are arranged side by side in this order. It is a configured structure.

In the horizontal die casting machine having such a structure, first, the movable die plate 59 and the movable die 60 are driven by a die clamping hydraulic cylinder (not shown) so that the movable die 60 contacts the fixed die 57. The cavities 61 are formed in contact with each other to complete the mold clamping. Next, the injection cylinder 52 of the zinc melt injection device is driven to push down the plunger tip 53, and the zinc melt 51 melted in the melting furnace 50 by this pressing pressure is transferred to the runner pipe 54, the nozzle 55, and the fixed mold 57. It is pressed into the cavity 61 through the gate 58 and filled. After cooling, the mold is opened and the zinc die cast product is taken out.

[0005]

[Problems to be solved by the device]

 By the way, with the recent demand for diversification and sophistication of cast products, some zinc die-cast products have been required to be cast together with inserts (parts) such as metals other than zinc. Since it is difficult to stably set the insert in the mold attached to the conventional horizontal die casting machine, it is difficult to manufacture a zinc die casting product including an insert by the horizontal die casting machine. It was difficult.

Further, the horizontal die casting machine is provided with a passage (see 63 to 62 in FIG. 3) in which the direction of the flow of the molten metal 51 largely changes from the tip of the nozzle 55 due to its basic structure. Since it was indispensable, there was a problem that the casting pressure loss for sufficiently filling the molten metal 51 into the cavity 61 was large and the energy efficiency was poor, and before the injection, there was a space in the passage (62, 63). Since there is a considerable amount of air, there is also a problem that air is easily caught in the molten metal 51 when the molten metal is pressed in, which deteriorates the casting quality.

The present invention is capable of stably manufacturing not only high-quality zinc die-cast products with clean surfaces without bubbles but also products including inserts safely under a good working environment, and energy saving. It is intended to provide an efficient vertical zinc die casting machine.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an upper mold attached to a vertically movable upper die plate driven by a mold clamping hydraulic cylinder, and forming a cavity by contacting the upper mold and forming the cavity in the cavity. A lower die that has a built-in extrusion mechanism that extrudes the product to be formed with an extrusion rod from the extrusion hydraulic cylinder through the lower die plate, and a zinc melt injection device that melts zinc and press-fits it into the cavity from its lateral injection port. In a vertical zinc die casting machine comprising: a lower die is mounted on a lower die plate that can be moved laterally along a guide by a hydraulic cylinder, and a zinc melting injection device is a lower die. It is characterized in that it is arranged adjacent to the mold moving opposite side.

[0009]

[Operation] In the vertical zinc die casting machine of the present invention, the lower die is mounted horizontally, and after the die is opened, it moves laterally from directly below the upper die. Therefore, when setting the insert, there are no obstacles on the upper part of the lower mold, so it is easy to set the insert in the lower mold and prevent work accidents. This will significantly reduce the adverse effects of the heat on the work environment. Moreover, the set insert is stable in the mold. Furthermore, maintenance of the device is easy. In addition, since the die of the vertical die casting machine of the present invention is configured such that the upper die and the lower die, that is, the lateral side is the molten metal injection port, it is complicated from the nozzle to the cavity of the zinc melt injection device. No need for a passage of molten metal. Therefore, the passage space of 63 in FIG. 3 is not necessary among the passage spaces (62 and 63 in FIG. 3) required in the mold of the conventional horizontal die casting machine, so that it is formed in the cavity in the past. Of the runner (formed in the passage space of 62 in FIG. 3) and the spool (formed in the passage space of 63 in FIG. 3) formed with the product, the spool is not formed. That is, the amount of air existing in the passage space is significantly reduced, and there is almost no risk of air being entrained in the molten metal during casting. At the same time, casting pressure loss is reduced.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial front sectional view of a vertical zinc die casting machine according to an embodiment of the present invention. FIG. 2 is a (left) side view of a vertical zinc die casting machine according to an embodiment of the present invention.

The vertical zinc die casting machine shown in FIG. 1 is basically mounted on a vertically movable upper die plate 8 and a zinc fusion injection device for press-fitting molten zinc into the cavity 21 of the die. And an upper die 7 and a lower die 13 mounted on a lower die plate 14 which is movable in the lateral direction.

The zinc melt injection apparatus includes at least a melting furnace 1, a gooseneck, and a molten metal 2 guiding mechanism. In the melting furnace 1, zinc is heated from below by a heat source such as a gas burner and melted to form a molten zinc 2. The gooseneck is basically composed of an injection cylinder 3 and a plunger tip 4 which is driven up and down to press out a predetermined amount of molten metal 2. The molten zinc 2 is guided from the nozzle 6 into the mold through the runner pipe 5.

The upper die 7 is attached to the upper die plate 8 by a die stopper and a die clamper. The upper die plate 8 is provided by being inserted into a plurality of tie bars 11 that are provided between the fixed base 17 and the top plate 9. The upper die plate 8 is connected to one end of the coupling 12, and is driven by a mold clamping hydraulic cylinder 10 connected to the other end of the coupling 12 to slide the tie bar 11 in the vertical direction.

The lower mold 13 that comes into contact with the upper mold 7 to form the cavity 21 and the molten metal inlet 22 is mounted on the lower die plate 14 by a mold stopper and a mold clamper. A plurality of slides 15 are fixed on the lower side of the lower die plate 14, and a plurality of guides 16 fixed on a fixed base 17 are driven by a hydraulic cylinder 23 to move in a lateral (ie, horizontal) direction. Is configured to move to. On the opposite side where the lower mold 13 moves so as to be set right under the upper mold 7, a zinc melting injection device is arranged adjacently. The lower mold 13 is also provided with a hole 18 ′ for accommodating a push rod 18 that pushes up a cast product from the lower side by an extrusion hydraulic cylinder 19 to separate it from the mold.

Next, the casting operation of the zinc die casting product including the insert by the vertical zinc die casting machine having such a configuration will be described. In the state where the upper die plate 8 is located at the upper side and the lower die plate 14 is in the state of the imaginary view in FIG. 1, that is, when the lower die plate 14 is moving to the leftmost side, first, the lower die 13 (in the cavity 21) is After the insert is installed, the lower die plate 14 is driven by the hydraulic cylinder 23 to move directly under the upper die 7. Next, the upper die plate 8 is driven downward by the mold clamping hydraulic cylinder 10 to bring the upper mold 7 into contact with the lower mold 13 at a predetermined pressure, and the mold clamping process is completed. Then, after that, the hydraulic cylinder 20 is driven so that the entire casting apparatus including the upper die 7 and the lower die 13 that has been clamped is slightly pulled toward the zinc melting injection device side, and the mouth of the nozzle 6 is opened. It adheres to the molten metal injection port 22. Further, the plunger tip 4 is driven downward by the injection cylinder 3 at a predetermined timing, a predetermined amount of the molten metal 2 in the gooseneck is squeezed out, passes through the runner pipe 5, and flows from the nozzle 6 to the molten metal injection port 22 of the mold. Then, it is press-fitted and filled in the cavity 21. After a predetermined cooling time after filling the cavity 21, the pressurizing force of the injection cylinder 3 is released, and at a predetermined timing thereafter, the entire casting apparatus filled in the cavity 21 by the hydraulic cylinder 20 is melted with zinc. It is slightly separated from the injection device. Then, the upper die plate 8 is driven upward by the mold clamping hydraulic cylinder 10, the upper die 7 is separated from the lower die 13, and the die opening step is completed. Then, thereafter, the hydraulic cylinder 23 is driven to move the lower die plate 14 laterally on the guide 16 so as to move away from the upper die 7. When moving to the final end on the guide 16, the push-out hydraulic cylinder 19 pushes up the push-out rod 18, and the zinc die-cast product including the insert rises from the lower mold 13 and separates.

[0016]

[Effect of device]

 As explained above, according to the present invention, not only high quality lead-free die-cast products with clean surfaces but also products including inserts can be safely and stably manufactured under a good working environment. , It has become possible to provide vertical zinc die casting machines with good energy efficiency.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a vertical zinc die casting machine according to an embodiment of the present invention.

FIG. 2 is a (left) side view of a vertical zinc die casting machine according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of a main part of a conventional horizontal die casting machine.

[Explanation of symbols]

 1 Melting Furnace 2 Molten Metal 6 Nozzle 7 Upper Die 8 Upper Die Plate 10 Clamping Hydraulic Cylinder 13 Lower Die 14 Lower Die Plate 15 Slide 16 Guide 18 Extrusion Rod 19 Extrusion Hydraulic Cylinder 20 Hydraulic Cylinder 21 Cavity

Claims (1)

[Scope of utility model registration request] 1. An upper mold attached to a vertically movable upper die plate driven by a mold clamping hydraulic cylinder,
The lower die has a built-in extrusion mechanism that abuts the upper die to form a cavity, and the product formed in the cavity is pushed out by the extrusion hydraulic cylinder through the lower die plate by the extrusion rod. In a vertical zinc die casting machine comprising a zinc melt injection device press-fitted into a cavity from its lateral injection port, the lower die is on a lower die plate movable laterally along a guide by a hydraulic cylinder. The vertical zinc die casting machine is characterized in that the zinc melt injection device is disposed adjacent to the lower mold moving opposite side.