JPH0242582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a die-casting mold device that is installed in a die-casting machine, and more particularly to a die-casting mold device that improves the workability of setup changes.

A die-casting mold for continuous casting using a die-casting machine has a structure and functions as roughly shown in FIGS. 1 and 2.

A die casting machine is provided with a fixed die plate and a movable die plate, on which a fixed mother die 1 and a movable mother die 2 are mounted facing each other. A fixed die (fixed side mold) 3 and a movable die (movable side mold) 4 are embedded in the opposing surfaces of both mother molds 1 and 2. The fixed mother mold 1 is provided with a molten metal passage 5 for supplying molten metal, a molten metal passage 6 of the movable mother mold 2 is connected to this passage 5, and this molten metal passage 6 communicates with the movable die 4. In addition, a push pin 8 and a return pin 9 embedded in a push-out plate 7 that can be slid in the front-rear direction penetrate the movable matrix 2.
Protrudes to the opposite surface. A hydraulically driven extrusion rod 10 is in contact with the rear of the extrusion plate 7 to control its front and rear positions.

With this structure, first move the movable side and align both bases 1 and 2 (Fig. 2), then the return pin 9
The tip of the push pin 8 is pushed back by the fixed mother die 1 surface, the tip of the push pin 8 is aligned with the inner surface of the movable die 4, and both dies 3 and 4 form a cavity in the shape of the product.
11 is formed. Then, the molten metal passage 5 is opened, the molten metal is allowed to flow, filling the cavity 11, and cooling water is allowed to flow to cool the molten metal, thereby completing the casting. Next, the movable mother mold 2 is separated, and at the same time the push rod 10 is pushed out, the push pins 8 release the product, and the state returns to the state shown in FIG.

As described above, the conventionally used die casting mold apparatus has a satisfactory casting function. However, one product has a pair of master molds 1 and 2 on the fixed side and the movable side, and is quite heavy, so it is difficult to set and reset the die cast machine for setup change or repair. Workability is poor, and material costs, manufacturing costs, and mold consumption costs increase, resulting in an increase in product costs.Furthermore, it is troublesome to manage the storage and preservation of a large number of molds.

This invention solves the above-mentioned problems and provides a die-casting mold device that can standardize the mother mold for each product without deteriorating the casting function, improve workability, and reduce costs. The purpose is to obtain.

In order to achieve the above object, the die casting mold apparatus of the present invention is configured as follows. That is, the present invention includes a molten metal passage and a cooling waterway,
A fixed mother mold is set on a fixed die plate of a die casting machine, and a molten metal passage is set on a movable die plate opposite to this and connected to the molten metal passage, through which a hydraulically driven extrusion rod is inserted. A fixed die is provided on the fixed mother mold, and a movable die unit is removably provided on the movable mother mold, and these fixed dies and movable die units are provided and replaced for each casting product. In the die casting mold device, the movable die unit is configured by combining a push pin and a return pin fixed to an extrusion plate that engage with the extrusion rod so as to be penetrable to the movable die, and the movable die unit The matrix and movable matrix are
The opposing surface has a tapered surface that reduces in the insertion direction of the fixed die and movable die unit, and has a fitting recess and a guide groove that can engage with the guide flanges of the fixed die and movable die on the depth side of this fitting recess. The fixed die and movable die unit are characterized in that the guide flange is fitted into the guide groove, tapered into the fitting recess, and fixed by a fixing plate.

This makes it possible to use a common mold having molten metal passages and cooling channels, and when changing or repairing equipment, relatively lightweight fixed dies and movable die units can be used, which improves work efficiency. It also reduces material costs and manufacturing costs, making administrative work easier and helping to reduce product costs.

Next, an embodiment of the die casting mold apparatus according to the present invention will be described. Figure 3 shows the fixed side,
The figure is an exploded perspective view of the movable mold and die.

In FIG. 3, the fixed master mold 12 includes a molten metal passage 1.
3 and a cooling channel 14 are provided, and this mother mold 12
is fixed to a fixed die plate 15 of the die casting machine. 16 is a guide pin provided on the opposing surface 17. A fitting concave portion 18 is formed on the upper surface of the fixed mother die 12 at an appropriate depth from the opposing surface 17. Both side surfaces 19 of the fitting recess 18 are narrowly inclined downward and have a vertical guide groove 20 in part. Reference numeral 21 denotes a fixed die (fixed die), both side surfaces 22 are narrowly inclined downward, a vertical guide flange 23 is formed in a part, and a cooling water channel 14a is opened in the inclined side surface. By fitting the guide flange 23 into the guide groove 20, taperingly fitting the fixing die 21 into the fitting recess 18, and fixing the fixing plate 24 from above, the fixing die 21 is completely unchanged from the conventional type. The mold is assembled. The cooling water channels 14, 14a are watertightly connected at the fitting surfaces. 25 indicates a suspension ring.

On the other hand, in FIG. 4, the movable mother die 26 is fixed to the movable die plate 27, and a molten metal passage 30 is provided on the surface 28 facing the fixed mother die 12, through which the guide hole 29 of the guide pin 16 and the molten metal passage 13 connect, A cooling water channel 31 is provided on the side surface. A fitting recess 32 is formed on the upper surface at an appropriate depth from the opposing surface 28. This fitting recess 32 has both side surfaces 33 expanding upward and being inclined, has a vertical guide groove 34 in a part thereof, and is further connected with a housing chamber 35 for a push-out plate 39 in the inner part. The movable die 36 has both side surfaces 37 narrowly inclined downward, and is partially provided with a guide flange 38. A cooling channel 31a is opened in the inclined side surface 37, and a molten metal channel 30a connected to the molten metal passage 30 is opened. At the same time, a push pin 40 and a return pin 41 implanted in the extrusion plate 39 are penetrated and provided as a unit. This movable die 36 is tapered fitted into the fitting recess 32 by fitting the guide flange 38 into the guide groove 34, and is fastened and fixed to the fixed plate 42 from above. The cooling channels 31 and 31a are watertightly connected, the extrusion plate 39 engages with an extrusion rod (not shown) housed in the storage chamber 35, and a movable mother mold similar to the conventional type is formed. 43 indicates a suspension ring.

As described above, in the die casting mold apparatus according to the present invention, the combination unit of the fixed die 21, the movable die 36, and the extrusion plate 39 is formed in the same way for each product, and the fixed and movable mother molds 12 , 26 can be made common and replaced at any time for use, improving work efficiency and reducing mold costs.

In addition, the fixed mother die and the movable mother die have a fitting concave portion with a tapered surface that shrinks in the insertion direction of the fixed die and the movable die on the opposing surface side, and a fixed die and the movable die on the depth side of this fitting concave portion. The fixed die and the movable die unit are provided with a guide groove that can be engaged with a guide flange of the die, and the fixed die and the movable die unit are configured to fit the guide flange into the guide groove, taper fit into the fitting recess, and fix by tightening with a fixing plate. When removing the fixed die and movable die unit, remove the fixed plate and apply a heat load to the die casting mold equipment. The fixed die and movable die unit can be easily and smoothly removed from the fixed and movable mother molds due to the difference in thermal expansion between the unit, the fixed mother mold, and the movable mother mold, and the wedge effect caused by the taper fitting. , the fixed die and the movable die unit can be smoothly replaced in a short period of time.

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal sectional side views showing the schematic structure of a conventional die-casting mold, and Figures 3 and 4 are
The figures are exploded perspective views showing an embodiment of the die casting mold according to the present invention, with FIG. 3 showing a fixed mother mold, and FIG. 4 showing a movable mother mold. 12... Fixed mother mold, 13... Molten metal passage, 14, 14
a... Cooling channel, 21... Fixed die, 26... Movable matrix, 30... Molten metal passage, 31, 31a... Cooling channel,
39... Extrusion plate, 40... Push pin, 41... Return pin.

Claims (1)

[Claims] 1. A fixed mother mold having a molten metal passage and a cooling waterway and set on a fixed tie plate of a die-casting machine, and a molten metal passage set on a movable die plate opposite thereto and connected to the molten metal passage, A movable die into which a hydraulically driven extrusion rod is inserted is provided, a fixed die is removably attached to the fixed die, and a movable die unit is detachably attached to the movable die. In the die casting mold device, the movable die unit is configured to allow the movable die to pass through a push pin and a return pin fixed to an extrusion plate that engages with the extrusion rod. The fixed mother die and the movable mother die have a fitting concave portion provided with a tapered surface that decreases in the insertion direction of the fixed die and movable die unit on opposing surfaces, and a fitting concave portion of the fitting concave portion. A guide groove that can be engaged with a guide flange of a fixed die and a movable die is provided on the depth side, and the fixed die and movable die unit fit the guide flange into the guide groove and taper fit into the fitting recess, A die casting mold device characterized by being fastened and fixed by a fixing plate.