JPH0252138A - Die device for squeeze casting - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mold apparatus used in a molten metal forging process.

Conventionally developed as a mold device for molten metal forging in Showa 567135.
The technique disclosed in Publication No. 6 is known.

According to this technique, the shape of the core mold to be inserted into the mold is formed so that it can be easily removed, thereby making it possible to insert and remove the core mold from the mold.

Problems to be Solved by the Invention Therefore, it is not possible to use a core mold with an undercut shape, and the shape of the core mold is limited. Therefore, for products that require a core mold with an undercut shape, the core mold is made thicker in advance and then molded into the desired shape by cutting.

As a result, there have been problems in that the product ff1ffi increases due to excess material in areas that are difficult to cut, and production costs increase due to cutting, which is a separate process.

Therefore, an object of the present invention is to provide a mold device for molten metal forging that can solve the problems of these conventional techniques.

Means for Solving the Problems The present invention is a molten metal forging mold device that casts molten metal into a cavity of a mold and presses it with a punch to shape the molten metal, in which the tip of the punch is attached to a center core. and a divided core mold, and is characterized in that it is assembled movably relative to the core mold center core in the axial and radial directions.

As a result of the present invention having the above-mentioned characteristic configuration, even if the core mold has an undercut shape, it can be easily removed from the product by moving the core mold relative to the center core in the radial and axial directions. Separated.

Example Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a front cross-sectional view of the apparatus in a pressurized state, and in this figure I represents a mold. This mold l is supported by a spring 3 on a substrate 2, and is guided in vertical movement by guide pins 4 fixed to the substrate 2. In addition, a hole 5 is formed in the mold l,
An end portion of a top core 6 supported by the substrate 2 is fitted into the hole 5 from below, and a cavity 7 is formed by the hole 5 and the top core 6. Molten metal is poured into this cavity 7. 8 is a notch inserted into the cavity 7'. This punch 8 includes a center core 11 connected to a /ring 9 via a joint 10,
The center core 11 is composed of a core-shaped core made up of a Philips core 12 and a side core 13, which are assembled so as to be relatively movable in the axial and radial directions (see Figures 1 and 2). ). The pair of left and right Philip cores 12 shown in FIG.
is held so as to be slidable in the radial (perpendicular to the axis) direction with respect to the center core II.

Note that 15 is a holding portion formed on the guide 14.

Furthermore, when the center core 11 moves upward, the lever 17 pivoted on the guide 14 is rotated by the pin 16 protruding from the center core 11, so that the upper limit of the center core 11 is rotated. It moves radially inward by the gap created by this. This makes it possible to remove the Philips core 12 from the product 30 having the undercap portion 30a. After the center core 11 is further raised and the shoulder portion 11a of the center core 11 comes into contact with the guide 14, the center core 11. The guide 14 and the Philips core 12 move upward together.

18 is a core ring, and this core ring 18 is a second core ring.
As detailed in the explanation of the figures, the mold 1 and the Philips core 12 are fixed to the platen 19. It closes the space between it and the side core 13.

Further, 20 is a guide post fixed to the substrate 2, and by fitting this guide post 20 with the guide hole 21 of the platen 19, the downward movement of the platen 9 can be performed reliably and smoothly. It has become.

FIG. 2 is a sectional view taken in a direction perpendicular to FIG. 1. In this figure, the platen 19 is connected to a cylinder (not shown).
It moves up and down independently with respect to the substrate 2 and punch 8. A pair of cylinders 22 are fixed to the platen 19 via slide locks 23, respectively, for reciprocating a pair of side cores 13 disposed on both sides of the center core 11 in the M vertical ff1 direction with respect to the center core II. has been done.

Further, the platen 9 is provided with a guide groove 24 for guiding the side core 13, and a core ring 18 that closes the gap between the mold 1 and the side core I3 is fixed.

25 is a bottle type, and this bottle type 25 has a main body 25a slidably accommodated in a recess 26 formed in the mold 1, and is reciprocated by a cylinder 27 fixed to the mold 1. The tip shaft portion 25b is adapted to be inserted into and taken out of the cavity 7.

Note that this figure shows a pressurized state, and the tip shaft portion 25b of the bottle mold 25 is in contact with the side surface of the side core I3. In addition, in the pressurized state, the lower end of the slide lock 23 is received in the recess 26 of the mold 1, and the slope portion 23a thereof abuts the slope portion 25C of the bottle mold 25 to restrict the movement of the bottle mold 25. are doing.

In this figure, the center core 11 is raised and A il
When the side core 13 reaches the position 17 :y 27
is pushed by and moves radially inward. This makes it possible to remove the side core 13 from the product 30 having the undercut portion 30b.

According to the embodiment structure shown in FIGS. 1 and 2 above, after a predetermined amount of molten metal is poured into the cavity 7 formed by the hole 5 of the mold l and the top core 6, the punch 8 is Pushed into Capity 7. As a result, the molten metal in the cavity 7 is solidified under high pressure. Furthermore, at this time,
The platen I9 is pressed downward by a cylinder (not shown), and the core ring 18 is brought into contact with the mold 1, and the slope portion 23a of the slide lock 23 is brought into contact with the slope portion 25C of the bottle mold 25.

After the molten metal in the cavity 7 solidifies, the center core 11 is first pulled up. When the center core 11 rises by a predetermined amount, the pin 16 of the center core 11 moves to the lever 1.
7 and the lever 17 moves the Philips core 12 inward in the radial direction. Furthermore, the center core 11 rises, and the shoulder portion 11a of the center core 11 moves to the guide 14.
When it comes into contact with the center core 11. The guide 14 and the Philips core 12 rise together, and the Philips core 12 is removed from the product 3° and the core ring 18.

When the center core 116''lW2 reaches A11 in the figure (a position where the center core 11 and side cores 13 do not interfere), the side cores 13 are moved radially inward by the cylinder 22. Then, the platen 1 is moved by the cylinder 22 (not shown).
9 and a cylinder 22 integral therewith. Coring 18. The side core 13 is pulled up and removed from the product 3o.

Next, when the slide lock 23 rises to a position where it does not interfere with the bottle mold 25, the cylinder 27 pulls out the tip shaft portion 25b of the bottle mold 25 from the cavity 7. Next, the top core 6 is pushed upward by the cylinder 28, and the product 30 is extruded from the mold l.

In addition, in the above operation, the center core 11/l (reaches the upper end first, and then the platen 19 and the side core 13 integrated therewith. The core ring 18 will rise. Therefore, the side core 13 will be moved in the radial direction. If the side cores 13 and the center core 11 remain moved inward, they will interfere with each other, so the cylinders 22 move the side cores 13 radially outward before the side cores I3 and the center core 11 interfere with each other. , the center core 11 and the core mold (phillip core 12, side core 13) are integrated.

To continue production, after returning the top core 6 and bottle mold 25 to the state shown in FIG. 2, molten metal is poured into the cavity 7, and the punch 8 is inserted into the cavity 7 again. In addition, when inserting the punch 8 ("F lowering"), the lowering speed of the center core Il side is made faster than the lowering speed of the platen 19 side, so that the assembly of the center core 11 and the core molds 12 and 13 is in good condition. Designed to be maintained.

Effects of the Invention As described above, in the present invention, the tip of the punch is composed of a center core and a divided core mold, and the center F5 is assembled so as to be movable relative to the center core in the axial and radial directions. Therefore, even if the core mold has an undercut shape, it can be easily separated from the 52 products. Therefore, the conventional cutting process of the product is no longer necessary, and the production cost I. can be reduced, and the excess material of the product can be reduced, making it possible to increase the longevity of the product.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a molten metal forging die apparatus showing an embodiment of the present invention, and FIG. 2 is a sectional view taken in a direction perpendicular to FIG. 1. l...mold, 7...cavity, 8...punch,
11...Center core, 12.13...Medium-742
゜1st 2 people not shown

Claims (1)

[Claims] (1) In a mold device for molten metal forging, which casts molten metal into a cavity of a mold and applies high pressure to it with a punch, the tip of the punch is connected to a center core and a divided core mold. A mold device for molten metal forging, characterized in that these core molds are assembled to be movable relative to a center core in the axial and radial directions.