JPH084200Y2 - Moving core guide device of die casting machine - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a die casting machine, and more particularly to a moving core guide device for pulling out a moving core.

[Prior art]

The moving core guide device of a die casting machine is generally well known as a device for moving a core that forms a recess or hole that must be drawn out at a right angle to a mold opening / closing direction or in a direction forming an angle. ing. Such a device is disclosed on pages 1486 and 1487 of the Casting Manual. (Showa 55
Issued on October 30, 2010, 3rd edition, editor: Japan Foundry Association) As shown in Figs. 4, 5 and 6, the movable core guiding device of the conventional die casting machine is a movable die 101. A pair of guide members 103 laid on both sides of the groove formed in,
A hydraulic cylinder 105 attached to one end of the guide member 103.
A slide holder 107 that slides along the guide member 103 in conjunction with the hydraulic cylinder 105, and the slide holder 1
It is composed of a moving core 109 connected to one end of 07.

[Problems to be solved by the device]

In such a moving core guide device, in order to support a guide member that guides a slide holder that moves in conjunction with a large output generated by a hydraulic cylinder, for example, an output of 40 to 50 tons,
It has been considered indispensable to form a groove in the movable mold. However, machining a groove in the movable mold leads to an increase in the manufacturing cost of the mold, and particularly when a large number of moving cores are required, the manufacturing cost of the mold is greatly increased. In addition, when the product shape is changed and the moving core drawing direction is changed, it is very difficult to change the groove position, so it is necessary to newly manufacture the entire movable mold. Become. Therefore, an object of the present invention is to make it possible to install a guide member on a flat surface of a movable mold and easily cope with a change in a drawing direction of a moving core.

[Means for Solving the Problems]

Therefore, the moving core guide device of the die casting machine of the present invention is detachably attached to the movable die in parallel with each other at a certain interval in a die casting machine equipped with a fixed die and a movable die. And a pair of guide members each having a guide groove at each opposing position, a drive mechanism attached to one end of the guide member, and a guide groove of the guide member movably engaged with the guide mechanism. It is characterized by including a slide holder that slides along the guide groove and a moving core connected to the slide holder.

[Action]

In this means, when the movable mold and the fixed mold are separated by the movement of the movable mold, the slide holder slides along the guide grooves of the pair of guide members in conjunction with the drive mechanism. The connected moving core is pulled out toward the drive mechanism. Further, the guide member is detachable from the movable mold, and once the guide member is detached from the movable mold, the direction of the guide member is changed and the guide member is fixed again to the movable mold. The direction of the groove is different from the conventional direction, and therefore the moving core withdrawal direction can be changed.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 in FIGS. 1 and 2 is a fixed mold (corresponding to a fixed die base). The fixed mold 1 is provided with a fixed insert 3 (corresponding to a fixed die). A cavity 11 is formed by the fixed insert 3, the movable insert (corresponding to a movable die) 5, the moving core 7 and the moving core 9. The molten metal of the aluminum alloy pressurized by the plunger 13 is supplied to the cavity 11 through the gate. The movable insert 5 forming the cavity 11 is fixed to a movable mold (corresponding to a movable die base) 15 by a well-known means such as positioning pins and bolts (not shown). The movable die 15 is fixed to the movable die plate 17 and interlocks with the reciprocating movement of the movable die plate 17.
The push pin 19 that connects the movable mold 15 and the movable insert 5 to each other.
Is provided. The push-out pin 19 is for pushing out the molded product of the cavity 11 when the fixed mold 1 and the movable mold 15 are separated from each other. On the flat surface 21 of the movable mold 15, a pair of guide members 23 standing upright with a constant interval are fixed by a plurality of bolts 25. Therefore, if the bolt 25 is pulled out, the guide member
23 can be removed from the movable mold 15. A slide holder 27 is arranged on the guide member 23. One end of the slide holder 27 is connected to the connecting rod 31 of the hydraulic cylinder 29, and the other end is connected to the moving core 7 or 9. The slide holder 27 slides while being guided by the guide member 23 in conjunction with the operation of the hydraulic cylinder 29. The structure of the guide member 23 will be further described with reference to FIG. Each of the guide members 23 has an L-shaped cross section composed of a horizontal portion 231 and a vertical portion 233, and is arranged on the flat surface 21 of the movable mold 15 at regular intervals in parallel so as to face each other. It is fixed by bolts 25. A key groove 33, which is a guide groove, is formed on the inner surface of the guide member 23. The projection 271 of the slide holder 27 is fitted in the key groove 33, and the slide holder 27 is guided without falling off. In this guide member 23, the lateral portion 231 increases the mounting area of the movable mold 15 on the flat surface 21 to stabilize the mounting of the guide member 23. Next, the operation and effect of this embodiment will be described. In the moving core guiding device of the die casting machine, first, the movement of the plunger 13 causes the molten aluminum alloy to be supplied to the cavity 11 through the gate at a high pressure in a short time. When the supplied molten metal is solidified, the movable die plate 17 operates and the movable die 15 separates from the fixed die 1. With this mold opening, the connecting rod of the hydraulic cylinder 29
31 operates and the slide holder 27 slides on the guide member 23. By sliding the slide holder 27 toward the hydraulic cylinder 27, the moving core 7 or 9 slides on the surface of the movable insert 5 so that the molded product can be taken out. In this state, the extrusion pin 19 operates and the molded product is taken out from the movable insert 5. When this molded product is taken out, the movable core 7 is returned to the initial position again by the operation of the hydraulic cylinder 29, and the fixed mold 1 and the movable mold 15 are matched. When the mold matching is completed, the plunger 13 is activated to supply the molten metal to the cavity 11. In this way, the casting cycle is completed. Further, in this embodiment, since the pair of guide members 23 are fixed to the flat surface 21 of the movable mold 15 by the bolts 25,
If the product shape has changed and you want to change the removal direction of the moving core, you can very easily change the setting position of the moving core guide device by drilling a female screw hole for a new bolt. is there. That is, the guide member 23 itself has the key groove 33 that is a guide groove without using a part of the movable mold 15 as a guide surface, and independently performs the guide function. Further, in this embodiment, the guide member 23 is fixed to the movable mold 15 by the bolt 25, and the workability of attaching / detaching the moving core guide device is extremely easy. Further, since the guide member 23 is erected on the flat surface 21 of the movable mold 15, the thickness of the movable mold 15 is larger than that in the case where the guide member is provided in the groove of the movable mold as in the conventional structure. Becomes thin,
The entire die casting mold can be downsized. Further, since the guide member 23 has an L-shaped cross section including the horizontal portion 231 and the vertical portion 233, the horizontal portion 231 increases the mounting area of the movable mold 15 on the flat surface 21, and the guide member 23 The installation is stabilized. The specific embodiment of the present invention has been described above.
The present invention is not limited to this embodiment, but includes various embodiments within the scope of the claims of the utility model.

[Effect of device]

As described above, according to the present invention, the pair of guide members for guiding the slide holder having the movable core attached thereto by the guide groove are detachably attached to the movable mold.
The pair of guide members independently perform the guide function that regulates the removal direction of the moving core and the slide holder, and the pair of guide members are detachable from the movable mold, so that the moving core removal direction Can be set without being restricted by the movable mold, and therefore, it is possible to extremely easily change the position of the moving core in the pulling direction with respect to the change of the shape of the cast product.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIGS. 4 to 6 show a moving core guiding device of a conventional die casting machine, and FIG. 1 shows movement of the die casting machine. FIG. 2 is a partial sectional view showing the core guiding device, FIG. 2 is a sectional view taken along section line II-II in FIG. 1, and FIG. 3 is III-III in FIG.
FIG. 4 is a fragmentary sectional view showing a moving core guiding device of a conventional die casting machine,
FIG. 5 is a sectional view taken along the line VV of FIG. 4,
FIG. 6 is a cutaway sectional view taken along the line VI-VI in FIG. 1 …… Fixed mold 7 …… Moving core 9 …… Moving core 15 …… Movable mold 21 …… Flat surface 23 …… Guide member 27 …… Slide holder 29 …… Hydraulic cylinder (drive mechanism)

Claims (1)

[Scope of utility model registration request] 1. A die casting machine equipped with a fixed mold and a movable mold, wherein the movable mold is removably mounted in parallel with each other at regular intervals, and guide grooves are provided at respective opposing positions. A pair of guide members, a drive mechanism attached to one end of the guide member, and a slide slidably engaged with the guide groove of the guide member and slid along the guide groove by the drive mechanism. A moving core guiding device for a die casting machine, comprising a holder and a moving core connected to the slide holder.