JPH03281055A - Vertical type die casting machine and docking method thereof - Google Patents

Abstract

PURPOSE:To shorten time cycle and to improve the productivity and the quality by supplying molten metal into a casting sleeve at side part of a fixed plate and after that, integrating the casting sleeve and a fixed die at the same time of mating a movable die and the fixed die to execute injection. CONSTITUTION:By feeding pressure oil into a die clamping cylinder 4, a movable plate 3 having the movable die 6 is vertically shifted to the fixed die 7 laid on the lower fixed die. Then, a driving shaft 23 having driving rack 27 is fixed to the movable plate 3 and further, a transmitting rack 25 as facing to the driving rack 27 is arranged to an injection unit side. These driving rack 27 and transmitting rack 25 are meshed with a transmitting gear 24 supported with a shaft as rotatable. By this constitution, the fixed die 7 and the movable die 6 are mated and at the same time, the casting sleeve 8 supplying the molten metal can be integrated with the fixed die 7. By this method, after completing the pouring of molten metal, as this can start the injection operation in a short time, the productivity and the quality can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention injects and fills a molten metal such as aluminum into a cavity formed by both molds using an injection device.

The present invention relates to a molding machine that performs molding, and particularly to a vertical die-casting machine in which an injection section and a mold section are simultaneously aligned before injection.

[Prior art] Conventionally, a mold clamping cylinder provided on an upper fixed plate moves a movable mold mounted on a movable plate up and down relative to a fixed mold placed on a lower fixed plate to align the molds. After completing the mold clamping operation, with the injection plunger inserted into the casting sleeve, pour the molten metal into the casting sleeve by tilting the casting sleeve, then turning the tilting cylinder. Activate it to wake up the injection unit. Furthermore, the cylinder and piston rod are operated simultaneously to raise the casting sleeve and injection plunger, and after pressing the casting sleeve against the lower surface of the fixed mold, pressure oil is immediately introduced to the injection cylinder to inject the molten metal.

When the injection is completed and the product has finished cooling, the movable mold is opened to take out the product, and in synchronization with the opening operation, the injection plunger further rises and extrudes the product and feeder. Thereafter, the injection plunger descends, and the casting sleeve simultaneously descends due to the operation of the cylinder. When the lowering of both was completed, the tilting cylinder was activated, and the injection unit entered a tilting state in which hot water could be supplied, completing one cycle.

[Problem to be solved by the invention] However, since the clamping of the fixed mold and the movable mold and the integration of the casting sleeve into the fixed mold are performed separately, the overall time cycle is long. As the injection operation cannot be started immediately after pouring, the temperature of the molten metal drops, forming a coagulated layer and reducing the quality of the product.

[Means for Solving the Problems] In order to solve this problem, in the present invention, one end of the drive shaft of the transmission means is fixed to the lower surface of the movable plate on the fixed plate side, and the other end is fixed to the lower surface of the movable plate on the fixed plate side. A driving rack is inserted through the insertion hole of the lower fixed plate, and a driving rack is provided in the extending part along the axis of the driving shaft, and the casting sleeve forms a base part opposite to the driving rack and is movable up and down. A transmission rack is provided on the outer wall along the axial direction of the block, and is engaged with the drive rack and the transmission rack, and is rotatably arranged with the center being pivotally supported, and transmits the vertical movement of the movable platen to the injection device. The structure is equipped with a transmission gear, and the casting sleeve and injection plunger are simultaneously activated by simultaneously operating the cylinder and piston rod at the same time as the movable mold and fixed mold are matched, using the device described in 5 above. The mold was raised, and the casting sleeve was pressed against the lower surface of the lower fixed mold to integrally perform injection.

[Operation] When the movable platen with the movable mold is moved up and down with respect to the fixed mold placed on the lower fixed mold by sending pressure oil to the mold clamping cylinder, the movable platen has a drive rack. Fix the drive shaft with
Furthermore, a transmission rack was provided on the injection unit side facing the drive rack. By meshing the drive rack and transmission rack with a rotatably supported transmission gear, the fixed mold and movable mold are matched, and the poured sleeve is integrated with the fixed mold at the same time. be able to.

[Embodiment] Figures 1 to 3 show an embodiment of the apparatus of the present invention. Figure 1 is an overall partial cross-sectional view of the apparatus of the present invention, and Figure 2 is a simultaneous operation of the mold section and injection unit. Indicates the operating order of
FIG. 2(a) shows the state of the mold part and the injection unit before the alignment operation, FIG. 2(b) shows the state of the mold part and the injection unit after the alignment operation, and FIG. 3 shows the state shown in FIG. I1
A 1-section plan view is shown.

1 is a lower fixed plate, 2 is an upper fixed plate, 3 is a movable plate, 4 is a mold clamping cylinder, 5 is a column, 6 is a movable mold, 7 is a fixed mold, B is an injection unit, 8 is a casting sleeve, 9 is an injection plunger, 10 is an injection cylinder, and 11 is a ladle for hot water supply. The lower end of the injection plunger 9 is connected to the injection cylinder 10
is connected to the piston rod loa. Further, a piston (not shown) that engages with the mold clamping cylinder 4 and is movable back and forth is provided, one end of a piston rod 30 is fixed to the piston, and a movable platen 3 is fixed to the other end of the piston rod 30. The movable platen 3 is inserted through the insertion hole of the movable platen 3 and is arranged to be able to move up and down while sliding on the column 5.

Between the fixed platen l and the fixed mold 7, there is a movable bolster 1 in the center thereof, which has a hanging hole 14 through which the casting sleeve 8 can move up and down.
5, and a notch 16 penetrating vertically from the center of the fixed platen 1 to one side end, and the casting sleeve 8 is provided so as to be movable laterally within this notch 16.

The casting sleeve 8 is vertically removably provided at a lower position of the fixed mold 7 mounted on the fixed platen l, and when the injection plunger 9 is inserted into the casting sleeve 8, A casting sleeve 8 separated from the lower surface is provided so as to be movable laterally below the fixed mold to a position where hot water can be supplied.

The central lower surface of the fixed mold 7 and the upper end surface of the casting sleeve 8 are formed into a ferrule so that they can be easily attached and detached. The lower end of the casting sleeve 8 is integrated with a block 18 forming a cylinder 17, and a ram 19 fixed to the upper part of the injection cylinder 1O is disposed inside the cylinder 17.
7 and ram 19, the casting sleeve 8 is moved up and down so as to hang. The cylinder 17 and the ram 19 were provided parallel to the piston rod 10a of the injection cylinder 10, and the lower end portion of the block 18 was provided so as to be slidable relative to the piston rod loa. The injection cylinder 10 has a structure that can be tilted around a shaft 20, and is operated by a tilting cylinder 21.
The injection position is regulated by a stopper 22.

Furthermore, a transmission means is provided for simultaneously performing the operation of aligning both the movable mold 6 and the fixed mold 7, and the operation of aligning the injection unit B with the fixed mold 7. This transmission means also comprises a drive shaft 23, a transmission gear 24 and a transmission rack 25.

One end of the drive shaft 23 is fixed to the movable platen 3, and the other end is extended after being inserted through a conduction hole 26 bored in the fixed platen 1, and a drive rack 27 is provided in this extended portion.

On the other hand, a transmission rack 25 is fixedly installed on the outer side wall surface of the block 18 along the block 18 at a position opposite to the drive shaft 23 .

The transmission rack 25 and the drive rack 27 mesh with each other.

In addition, a rotatably supported transmission gear is provided in a part of the device (not shown), and with this configuration, as the movable platen 3 is lowered, the movable die 6 and the fixed die 7 are aligned. When entering the injection unit B, the linear motion of the drive rack 27 provided at the tip of the drive shaft 23 is transmitted via the rotary motion transmission gear 24 to the transmission rack 28 disposed on the outer wall surface of the block 18. The casting sleeve 8 is integrated with the fixed mold 7.

Furthermore, during the mold opening operation, the operation is reversed, and as the movable platen 3 rises, the mold opening simultaneously lowers the casting sleeve 8 of the injection unit B and separates it from the fixed mold 7. There is.

In the embodiment shown in FIG. 1, after the casting sleeve 8 is lowered, it is moved laterally by swinging about the shaft 20. It is also possible to move it in the horizontal and lateral directions as it is.

Next, the operation of this embodiment configured as above will be explained.

With the injection plunger 9 inserted into the casting sleeve 8, the casting sleeve 8 is placed at the position C shown by the two-dot chain line in FIG. 1, and the molten metal is poured into the casting sleeve 8 using a ladle.

Next, the tilting cylinder 21 is actuated to rotate around the shaft 20 and raise the injection unit B to the position D shown by the solid line in FIG.

At this time, the transmission gear 24 and the transmission rack 25 mesh with each other. After that, when pressure oil is supplied to the mold clamping cylinder 4, the piston rod 30 moves forward as the piston in the mold clamping cylinder 4 moves forward, and the movable mold 6 attached to the movable platen 3 moves onto the lower fixed platen 1. The mold matching operation begins for the fixed mold 7 attached to the mold.

At this time, as the movable platen 3 descends, the transmission rack 25 fixed to the movable platen 3 descends.
The linear motion of No. 5 is once transmitted to the transmission gear 24 as a rotational motion, and further to the casting sleeve 18 of the injection unit B.
The linear motion is again transmitted to the transmission rack 25 fixed to the outer wall of the motor. As the above-mentioned movements continue, the movable mold 6 and the fixed mold 7 are finally brought into alignment, and at the same time the casting sleeve 8 and the injection plunger 9 are brought together as shown by the two-dot chain line in FIG. Raise it to position E and press the casting sleeve 8 against the lower surface of the fixed mold 7.

Immediately after pressing the casting sleeve 8 is completed, press the injection cylinder l.
Pressure oil is led to O, and molten metal is injected. When injection is completed and cooling of the product is completed, the movable mold 6 is opened to take out the product. In synchronization with the opening operation, the injection plunger 9 further rises and extrudes the product and feeder portion. Thereafter, the injection plunger 9 descends, and the casting sleeve 8 also descends at the same time due to the operation of the cylinder 17. When the lowering of both is completed, the tilting cylinder 21 is activated, and the injection unit B is tilted to the position C, completing one cycle.

In the present invention, if the thickness of the movable mold 6 and the fixed mold 7 changes when the two molds are matched (hereinafter referred to as die-hide), the tip of the casting sleeve 8 of the injection unit B will change to the fixed mold. 7 The position where it is integrated with the lower part will change.

That is, as the die hide becomes smaller, the amount of change in movement of the movable mold 6 relative to the fixed mold 7 increases, and at the same time, the amount of change in movement of the casting sleeve 8 with respect to the fixed mold 7 also increases. In this way, when the die hide becomes smaller, the difference between the die bite and the state before the die hide changes becomes the amount of change in movement of the casting sleeve 8, so this amount of change in movement of the casting sleeve 8 is absorbed, and the movement of the casting sleeve 8 is absorbed. Mold 6 and fixed mold 7
When the mold matching is completed, the casting sleeve 8 is automatically removed.
A fixed mold 7 is used in which the contact portion between the fixed mold 7 and the casting sleeve 8 is deeply carved on the fixed mold 7 side so that the casting sleeve 8 is integrated with the fixed mold 7.

On the other hand, if the die hide becomes large, it is preferable to use a fixed mold 7 in which the contact area between the casting sleeve 8 and the fixed mold 7 is shallow (carved) on the fixed mold 7 side.

In the above, the die hide is changed by carving the contact point of the fixed mold 7 with the casting sleeve 8, but the present invention is not limited to this, and the height of the movable bolster 15 may be changed.

[Effect of the Invention J As described above, in this invention, molten metal is supplied into the casting sleeve on the side of the fixed platen, and then, at the same time as the molds of the movable mold 6 and the fixed mold 7 are aligned, the casting process is performed. Since injection is performed integrally with the sleeve and fixed mold, the overall time cycle can be shortened, and the injection operation can be started in a short time after pouring, which prevents the molten metal from cooling down. This can improve productivity and quality.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the apparatus of the present invention. Figure 1 is a partially cross-sectional overall view of the apparatus of the present invention, and Figure 2 shows the sequence of simultaneous operations for aligning the mold section and the injection unit. show,
FIG. 2(a) shows the state of the mold part and the injection unit before the alignment operation, FIG. 2(b) shows the state of the mold part and the injection unit after the alignment operation, and FIG. 3 shows the state shown in FIG. II
I cut section plan view. 1.2...Fixed plate, 3...Movable plate, 4...
・Mold clamping cylinder, 6... Movable mold, 7... Fixed mold, 8... Casting sleeve, 9゛... Injection plunger, 10... Injection cylinder, 11... Hishiyaku , 15...Moving bolster, I6...
Notch, 17... Cylinder, 19°... Ram, 21... Tilting cylinder, 23...
- Drive shaft, 25... Transmission rack, 24... Transmission gear, 27... Drive rack.

Claims (2)

[Claims] (1) A movable plate for holding a movable mold is placed between a lower fixed plate on which a fixed mold is placed and an upper fixed plate on which a mold clamping cylinder is placed, and a movable plate for holding a movable mold is attached to the tip of the mold clamping cylinder. On the other hand, the casting sleeve is arranged to be freely attachable and detachable from below to the fixed mold, and the casting sleeve is separated from the lower fixed mold with the injection plunger inserted into the casting sleeve. In a vertical die-casting machine equipped with an injection device that can move the sleeve laterally below a fixed mold, one end of the drive shaft of the transmission means is fixed to the lower surface of the movable platen on the lower fixed platen side, and the other end The part extends through the insertion hole of the lower fixed plate, and a drive rack is provided in the extended part along the axis of the drive shaft, and the base part of the cast sleeve is arranged opposite to the drive rack. A transmission rack is provided on the outer wall along the axial direction of the movable block, and is engaged with the drive rack and transmission rack, and is rotatably supported at the center, and the vertical movement of the movable plate is controlled by the injection device. A vertical die-casting machine characterized by being equipped with a transmission gear that transmits information to the user. (2) Using the device according to claim 1,
At the same time as the mold matching between the movable mold and the fixed mold is completed, the cylinder and piston rod are operated simultaneously to raise the casting sleeve and injection plunger, pressing the casting sleeve against the lower surface of the lower fixed mold and making them integral. A method for docking a vertical die-casting machine, characterized in that injection is performed using a vertical die-casting machine.