JPH06312254A - Die casting machine - Google Patents

Abstract

PURPOSE:To extremely easily attach and detach a retracting rod on and from an extruding plate. CONSTITUTION:A die base 4 is fixed on a movable metallic die 2 via a spacer 3. An extruding piston 5 is movably provided in the axial direction on the movable metallic die 2 and an extruding plate 6 is provided on the end part of extruding piston 5. An attaching/detaching jig 9 for the retracting rod is provided on the extruding holding part 11a and relief part 11b are formed on the attaching/ detaching jig 9. A movable plate 14 is attachably/detachably provided on the die base 4 and the retracting rod 15 is provided on the movable plate 14. A large diameter part 15b is formed on one end part of the retracting rod 15 and whose diameter is a little smaller than the relief part 11b and larger than the width of rod holding part 11a. An extruding cylinder 18 is provided on another end part of retracting rod 15 with a mount 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting machine, and more particularly to a pullback rod attaching / detaching mechanism.

[0002]

2. Description of the Related Art Generally, a die casting method is widely known as a precision casting method. A dedicated die casting machine is used for this die casting method. Further, this die casting machine is provided with a product extrusion device for separating the cast product from the mold.

In this product extrusion device, conventionally, an extrusion plate at the rear of a movable plate and a mounting plate of a mold part are connected by a connecting rod, and a hollow pin attached to the rear surface of the extrusion plate is forwardly attached to the mounting plate. A clamp plate with a flask-shaped oblong hole is rotatably mounted on the rear surface of the mounting plate according to the mounting position of the hollow pin, and the rotation drive source of this clamp plate is The one provided at the rear has been proposed (Japanese Patent Laid-Open No. Sho 5).
6-47258).

On the other hand, as another product extruding apparatus, a hook member having a hook portion for holding the product extruding plate at its tip end is rotatably attached to an extruding member which can be moved back and forth, and the inner surface portion of the hook portion and the product extruding member are extruded. Each of the back edges of the plate is provided with a taper part that makes it easy to attach the product extrusion plate, and the other end of the hook member is rotatably connected to a hook member opening / closing member that can be moved back and forth, and the product is opened and closed by the hook member. It has been proposed that the extruded plate is released and held (JP-A-59-209469).

[0005]

However, JP-A-56 is used
-47258, the mechanism of the rotation drive source for rotating the clamp plate is complicated, maintenance and inspection is difficult, and burr penetrates the insertion hole of the mounting shaft of the clamp plate to cause malfunction. May occur. Also, since the clamp plate rotates, a slight gap is required between the hollow pin and the clamp plate, but this gap causes rattling, and even if the clamp plate is pulled back, it may be pulled back. The push pin may project into the cavity. On the other hand, the one described in JP-A-59-209469 has a problem that if the position of the product extruding plate is too close to the cavity side, it cannot be clamped by the hook member, so that the positioning operation is difficult. . Further, in the ones described in both publications, a generally widely known extrusion cylinder cannot be provided on the center line of the extrusion plate, and it is necessary to redesign the extrusion cylinder, which is not versatile.

The present invention has been made in view of the above problems, and can be used in a conventional die casting machine, and moreover, the operation of connecting and disconnecting the pushing plate and the pullback rod can be easily performed. The object is to provide a die casting machine that can be used.

[0007]

The present invention comprises a fixed mold,
In a die casting machine equipped with a movable mold that can be brought into contact with and separated from this fixed mold, an extrusion pin that is provided movably on the movable mold and that separates a cast product from the movable mold, and this extrusion pin An extruded plate held at one end side,
A pullback rod attaching / detaching jig held on the extruded plate via a supporting member, a die base provided on the movable die via a spacer, a movable platen on which the die base is detachably attached, and a movable platen. The platen includes a pullback rod movably provided in the axial direction and a drive device for driving the pullback rod. The pullback rod has a main body and a diameter larger than the diameter of the main body at one end of the main body. The pullback rod attaching / detaching jig has the large diameter portion having a width that can be arranged between the push-out plate and the pullback rod attaching / detaching jig. A relief portion through which the large-diameter portion can penetrate, and a rod holding portion that communicates with the relief portion and has a width dimension between the diameter dimension of the main body portion of the pullback rod and the diameter dimension of the large-diameter portion. That And it features.

[0008]

[Operation] When connecting the pullback rod and the pushing plate,
The jig for attaching / detaching the pullback rod is hung up, the large diameter portion of the pullback rod is made to penetrate through the relief portion of the jig for attaching / detaching the pullback rod, and the tip end portion of the pullback rod is pressed against the extrusion plate. In this state, the pullback rod attaching / detaching jig that has been lifted is lowered, and the rod holding portion is engaged with the main body portion of the pullback rod. As a result, the pullback rod is held in contact with the push-out plate.

When the push-out plate is pulled out from the pull-back rod from the above-mentioned state, the pull-back rod attaching / detaching jig is suspended and the large diameter portion of the pull-back rod is pulled out from the escape portion of the pull-back rod attaching / detaching jig. The large diameter part of the pullback rod is separated from the extruded plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially enlarged sectional view of a product extrusion device used in a die casting machine according to the present invention. In the figure, reference numeral 1 is a fixed mold, and a movable mold 2 is provided at a position facing the fixed mold 1 so as to be able to come into contact with and separate from the fixed mold 1. A spacer 3 is fixed to the right side surface of the movable mold 2 in the figure, and a die base 4 is fixed to the right end side of the spacer 3. Further, the movable mold 2 is provided with push pins 5 and 5 which are movable in the axial direction, and a push plate 6 is fixed to the right end of the push pin 5 in the figure. That is, the large diameter portion 5a is formed at the end of the push pin 5, and the large diameter portion 5a is engaged with the first pin plate 6a so as to cover the engagement side of the first pin plate 6a. The second pin plate 6b is in contact. The push-out plate 6 is formed by the first pin plate 6a and the second pin plate 6b. A stopper member 7 is fixed to the lower part of the right side surface of the push plate 6 in the figure, and a guide member 8 also serving as a stopper is fixed to the upper part of the right side surface of the figure. The spacer 3 is formed with a notch 3a which is long in the left-right direction in the drawing, and penetrates the notch 3a and the guide member 8 from above and prevents the stopper member 7 from dropping downward in the drawing. A jig 9 is provided.

FIG. 2 is an enlarged view of the pullback rod attaching / detaching jig 9. Reference numeral 10 in the drawing is a base long in the left-right direction in the drawing, and rod fixing portions 11, 11 are provided at both ends of the base 10.
Is provided. The rod fixing portions 11 and 11 are open on the lower side in the drawing and are long in the vertical direction.
a and 11a are formed. Rod holding parts 11a, 1
Relief portions 11b and 11b are formed at appropriate places on 1a. Further, tapered portions 11c, 11c are formed in the lower openings of the rod holding portions 11a, 11a. In addition, a positioning portion 12 is fixed substantially below the center of the base 10, and a positioning hole 12a is formed in the positioning portion 12. An eyebolt 13 is fixed to approximately the center of the upper surface of the base 10. Further, in FIG. 1, inclined surfaces 11d and 11d are formed in the vicinity of the contact portions of the stopper member 7 and the guide member 8 of the rod fixing portion 11.

On the other hand, in FIG. 1, a movable platen 14 is disposed on the right side of the die base 4 in the figure, and the die base 4 is detachably attached to the movable platen 14. Pullback rods 15, 15 are inserted into the movable platen 14 so as to be movable in the axial direction. A mounting plate 16 is provided on the right end side of the main body portion 15a of the pullback rod 15 so that the nut 1
It is fixed by 7,17. A push-out cylinder 18 is fixed to the mounting plate 16, and the pullback rod 15 is configured to move in the left-right direction in the drawing via the mounting plate 16. Further, a large diameter portion 15b is formed at the left end portion of the body portion 15a of the pullback rod 15 in the figure, and the diameter of the large diameter portion 15a is slightly smaller than the diameter of the relief portion 11b. It is formed larger than the width. The width of the large diameter portion 15b is set to be approximately the same as the width of the space between the push-out plate 6 and the pullback rod attaching / detaching jig 9.

The operation of the product extruding apparatus thus configured will be described below. When mounting the movable mold 2, first hook a hook (not shown) on the eyebolt 13 to lift the pullback rod attaching / detaching jig 9 upward in FIG.
A positioning pin (not shown) biased by an elastic member (not shown) on the die base 4 is engaged with the positioning hole 12a. After that, the hook (not shown) is removed. In this state, the die base 4 is brought into contact with the left side surface of the movable platen 14 provided with the pullback rod 15 in the drawing. Then, the pushing cylinder 18 is driven, and the pullback rod 15 is driven.
The large diameter portion 15b of the die base 4 through the relief portion 11 of the rod fixing portion 11 and the hole 4a formed in the die base 4,
The drive of the push-out cylinder 18 is stopped by bringing it into contact with the pin plate 6b. Then, the die base 4 is fixed to the movable platen with a bolt (not shown).

Next, the pushing cylinder 18 is re-driven to move the pullback rod 15 leftward in the drawing. Then, the push plate 6 moves leftward in the figure. Along with that, the pullback rod attaching / detaching jig 9 also moves to the left, and when a predetermined stroke moves, the positioning pin (not shown) causes the positioning hole 12 to move.
The pull-back rod attaching / detaching jig 9 deviates from a and descends from above to the position of FIG. 2 by its own weight. At this time, the pullback rod 15 is smoothly engaged by the taper portion 11c formed on the pullback rod attaching / detaching jig 9, and the stopper member 7 and the guide member 8 have inclined surfaces 11d and 11d.
The d descends smoothly. At this time,
The large diameter portion 15b of the pullback rod 15 is housed in the space formed between the push-out plate 6 and the pullback rod attaching / detaching jig 9, and the width of the rod holding portion 11a is smaller than the diameter of the large diameter portion 15b. , The pullback rod 15 is prevented from moving with the pullback rod attaching / detaching jig 9 removed.
The push plate 6 and the pullback rod 15 are integrated.

In this state, casting is performed and the movable mold 2
Is moved away from the fixed mold 1 and the push-out cylinder 18 is operated, so that the pull-back rod 1 is moved through the mounting plate 16.
5 is moved to the left in the figure, and the extrusion pin 5 is further projected through the extrusion plate 6 so that the cast product is separated from the movable mold 2.

Next, when the movable mold 2 is removed, a bolt (not shown) is removed so that the die base 4 and the movable platen 14 can be separated from each other. Then, the pullback rod attaching / detaching jig 9 is raised, positioned at a predetermined position, and held in a suspended state. Then, the movable mold 2 is moved to the left in the figure. At this time, the pullback rod 15
The large-diameter portion 15b is formed to have a diameter slightly smaller than that of the relief portion 11b. it can.

[0017]

Since the present invention is configured as described above, a product extruding device that can be used in a conventionally used die casting machine is used, so that it is not necessary to design it again. It has excellent versatility. Also,
The attaching / detaching operation of the push-out plate and the pull-back rod can be performed very easily. Further, since the inclined surface is formed between the rod fixing portion of the pullback rod attaching / detaching jig and the support member, there is no need to provide a sliding gap, and there is no play in the connected state of the pullback rod and the pushing plate. It is possible to prevent sticking.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a product extrusion device used in a die casting machine of the present invention.

FIG. 2 is a view showing a jig for attaching and detaching a pullback rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed mold 2 ... Movable mold 3 ... Spacer 4 ... Die base 5 ... Extrusion pin 6 ... Extrusion plate 7 ... Stopper member (supporting member) 8 ... Guide member (supporting member) 9 ... Pullback rod attaching / detaching jig 11a ... Rod holding portion 11b ... Relief portion 14 ... Movable platen 15 ... Pullback rod 15a ... Main body portion 15b ... Large diameter portion 18 ... Extrusion cylinder (driving device)

Claims (1)

[Claims] 1. A die casting machine comprising a fixed mold and a movable mold which is provided so as to be able to come into contact with and separate from the fixed mold, wherein the movable mold is provided so as to be movable, and the cast product is a movable mold. From the extrusion pin, an extrusion plate held at one end side of the extrusion pin, a pullback rod attachment / detachment jig held by the extrusion plate via a support member, and a spacer for the movable mold. A die base provided, a movable platen to which the die base is detachably provided, a pullback rod axially movable on the movable platen, and a drive device for driving the pullback rod are provided. , The main body portion and one end of the main body portion are formed with a diameter larger than the diameter of the main body portion,
A large-diameter portion having a width that can be arranged between the push-out plate and the pullback rod attaching / detaching jig, and the pullback rod attaching / detaching jig can be penetrated by the large-diameter portion of the pullback rod. A die casting characterized in that a relief portion and a rod holding portion, which is communicated with the relief portion and has a width dimension between the diameter dimension of the main body portion of the pullback rod and the diameter dimension of the large diameter portion, are formed. Machine.