JPS6157107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting mold such as a die-casting mold having a sliding core that forms uneven parts such as screws on a ring-shaped inner wall surface.

Conventionally, casting molds for casting products that form uneven parts such as screws on the ring-shaped inner wall surface have had a complex structure and were expensive because hydraulic devices were used to move the center core and slide core. It has the disadvantage of becoming

In view of the above-mentioned conventional drawbacks, the present invention has a simple structure that allows even a slide core with uneven parts such as screws on the inner wall surface of a small ring shape to be easily moved. The objective is to obtain a casting mold that does not require the use of a special hydraulic device to move the mold.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

In Figures 1 to 4, 1 is a fixed mold;
This fixed mold 1 has a product forming recess 2 formed therein. 3 is a movable mold corresponding to the fixed mold 1. 4, 5, and 6 are the fixed mold 1 and the movable mold 3.
and slide cores located on both sides of this center core 4. As shown in FIG. 2, the slide cores 5 and 6 have T-shaped rails 5a and 6a formed on their upper portions, and are configured to slide within the guide grooves 3a and 3b of the movable mold 3. There is. Reference numeral 8 denotes a pressing plate to which the rear end of the center core 4 is fixed, and stopper pin through holes 9, 9 are formed at positions on both sides of the pressing plate 8. Reference numerals 10 and 10 designate stopper pins that are fixed to the movable mold 3 through the stopper pin through holes 9, 9, and stop the pressing plate 8 from moving further away from the movable mold 3 after it has moved a predetermined amount. 11 is the pressing plate 8
The pressing plate 11 is connected to a hydraulic cylinder (not shown), etc., and these hydraulic cylinders, the pressing plate 11, the pin 12, the pressing plate 8, and the stopper pin 10 The mobile device 13 is configured by the following. 14,
Reference numeral 15 denotes a guide member for moving the slide cores 5 and 6 to the space where the center core 4 was located when the mold was opened, and in this embodiment, the guide members 14,
15 is fixed to the fixed mold 1. 16 is a runner formed in the fixed mold 1, and this runner 16
may be formed between the fixed mold 1 and the slide cores 5 and 6.

In the above structure, when the mold is clamped, the center core 4 and slide cores 5 and 6 enter the product forming recess 2 of the fixed mold 1 to form a cavity 7, as shown in FIG. The molten metal is press-fitted through the runner 16. After that, since the pressing plate 11 moves in the direction of the arrow, the pressing plate 8 also moves in the same direction, the center core 4 attached to this pressing plate 8 moves in the same direction, and the pressing plate 8 moves in the direction of the stopper pins 10, 10. When the center core 4 moves to the stop position, the tip 4a of the center core 4 comes out of the slide cores 5 and 6, as shown in FIG. When the pressing plate 11 further moves, the movable mold 3 moves together with the slide cores 5 and 6 in the direction of the arrow as shown in FIG. At this time, since the rear ends of the slide cores 4, 5 are in contact with the guide members 14, 15, the slide cores 5, 6 are moved in the direction of the arrow by the curved portions 14a, 15a of the guide members 14, 15. . Thereby, the product stuck to the slide cores 5, 6 can also be removed from the slide cores 5, 6 and taken out.

Note that during mold clamping, the center core 4 contacts the tapered portions 5b, 6b of the slide cores 5, 6, pushes the slide cores 5, 6 open, and enters the product forming recess 2.

As is clear from the above description, in the present invention, the slide core that forms uneven parts such as screws on the small ring-shaped inner wall surface is moved by the guide member, so the structure is simple and small products are possible. Can be cast.
Further, since the center core can be moved by a device that moves a movable mold, there is no need to use a special hydraulic device, and there are excellent advantages such as low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line --- in FIG. 1, and FIGS. 3 and 4 are schematic explanatory views showing the mold opening state. 1...Fixed mold, 2...Product forming recess, 3...
Movable mold, 4... Center core, 5, 6... Slide core, 7... Cavity, 8... Pressing plate,
9... Stopper pin through hole, 10... Stopper pin, 11... Pressing plate, 13... Moving device, 1
4, 15... Guide member.

Claims (1)

[Claims] 1. A fixed mold in which a product forming recess is formed, a movable mold that can slide in the clamping mold opening direction corresponding to the fixed mold, and a mold that enters the product forming recess of the fixed mold to form a cavity. A center core is attached to the movable mold so as to be slidable in the movable mold, and a center core is attached to the movable mold so as to be slidable in a direction perpendicular to the mold opening direction of the movable mold, and the center core is slidably mounted in the movable mold. A pair of slide cores that slide outward when inserted, at least two or more stopper pins fixed to the movable mold, a press plate slidably attached to these stopper pins, and a press plate attached to the press plate. A moving device that moves the movable mold in the mold opening direction after moving the center core by a predetermined amount in the mold opening direction, which is composed of a pressing plate that is reciprocated by a hydraulic cylinder or the like attached via a pin. The pair of sliding cores can be positioned in the product forming recess when the mold fixed to the stationary mold is closed, and the pair of sliding cores can be positioned in the product forming recess in the latter half of the mold opening. A casting mold characterized by comprising a pair of guide members that can be moved to a space where the casting mold was used.