JPS60216965A - Insert-casting device - Google Patents

Abstract

PURPOSE:To enable simple insert-casting and joining of a molding member and cylindrical body by plunging one end of the cylindrical body into a cavity, holding said body between a cope and drag and fitting slidingly a stopping piston into the cylindrical body. CONSTITUTION:A device for insert-casting of one end of the cylindrical body 14 to the molding member 32 is provided with holding grooves 15, 16 for holding the body 14 to the respective joint surfaces of the cope 1 and the drag 2 delineating the cavity 3 as well as a guide hole 17 and guide grooves 18, 19 of the stopping piston 31 fitted slidingly into the body 14. The cope 1 and drag 2 are thus closed and the body 14 is surely held between grooves 15 and 16 by the piston 23. A cylinder 29 is extended to position the piston 31 into the body 14 and the molten metal poured into a molten metal pool part 4 is poured by a pressurizing piston 9 through a runner 5 into the cavity 3. The molten metal is pressurized by a pressurizing piston 13. The simpler joining stage for the molding member and the cylindrical body is thus made possible.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Application Field The present invention is directed to a method of casting one end of a cylindrical body into a molded member formed by casting in order to join the molded member and the cylindrical body. Related to casting equipment for casting.

(2) Prior Art Conventionally, when joining a molded member and a cylinder, the molded member is formed in advance by casting or forging, and then, as shown in FIG. 3, the molded member 32' and the cylinder are joined together. The bodies 14' are fitted together (joined 17).

(3) Solved by the invention (Problems 7 and 5) According to such conventional technology, the fitting part 33 of the molding part 32' is connected to the cylinder body 1.
4', the inner surface of the cylindrical body 14' must be machined to ensure a secure fit, and a knock pin 34 to prevent rotation must be driven in.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a casting device that simplifies the joining process by casting one end of a cylindrical body when casting a molded member. .

B0 Structure of the Invention (1) Means for Solving Problems According to the present invention, an upper mold and a lower mold which cooperate to define a cavity for pouring molten metal 12 and casting a molded member 7. Each joint surface is provided with a holding groove for holding the cylindrical body with I2 so that one end protrudes into the cavity, and a portion between the holding groove and the outer surfaces of the upper and lower molds is provided inside the cylindrical body. Compatible with surfaces (7)
A guide groove is provided to form a cylindrical body, and a hot water stopper piston is disposed to slide into the guide hole and the cylinder body.

(2) Function According to the above configuration, one end of the cylinder is integrally cast during casting of the molded member, and the stopper piston prevents an excessive amount of molten metal from flowing into the cylinder.

(3) Embodiment Below, an embodiment of the present invention will be described with reference to the drawings. First, in FIG. Recesses 6 and 7 are respectively provided to define the . In addition, a sleeve 8 that communicates with the lower part of the hot water storage section 4 is fitted and fixed in the lower mold 2.
A primary pressure piston 9 is slid into this sleeve 8 . Further, a sleeve 10 extending vertically and communicating with the lower part of the cavity 3 is fitted into and fixed to the lower die 2, and a knockout bottle 11 is slidably fitted into the sleeve 10. The upper mold 1 has a sleeve 12 communicating with the upper part of the cavity 3. is fitted and fixed, and a secondary pressure piston 13 is slidably fitted onto this sleeve 12.

A cylindrical body 1 is provided on both the joint surfaces of the upper mold 1 and the lower mold 2.
4 so that one end of it protrudes into the cavity 3. Holding grooves 15 and 16 are provided for holding from both sides. Further, in order to form a guide hole 17 between the holding grooves 15 and 16 and the outer surfaces of the upper mold 1 and lower mold 2, a guide groove 18 is formed on the joining surface of the upper mold 1 and the lower mold 2.
．． 19 are provided respectively. Moreover, the guide hole 17 is provided with a cross section I2 corresponding to the inner surface of the cylinder 14, so that both the holding grooves 15, 16 and the guide groove 18° 1
Step portions 20 and 21 are provided between the holes 9 and 9.

The upper mold 1 is provided with nine holes 22 that extend vertically so that their lower ends open on the side surfaces of the guide grooves 18.
A suppression piston 23 is slidably fitted therein. Moreover, between the closing plate 24 that closes the upper end of the hole 22 and the pressing piston 23,
A spring 25 is interposed, and the force of the spring 25 causes the pressing piston 23 to move downward, that is, toward the guide groove 1.
8 and is biased in the direction of protrusion. Further, a regulating step 26 facing upward is provided in the middle of the hole 22, and an engaging flange 2 that can come into contact with the regulating step 26 is provided at the upper end of the pressing piston 23.
7 is provided, and the restriction step portion 26 and the engagement collar 27 prevent the suppression piston 23 from falling off downward.

A support plate 28 fixed to the outer surface of the lower mold 2 has a guide hole 1.
A cylinder 29 having the same axis as 7 is supported and fixed, and at the tip of a piston rod 30 of this cylinder 29,
A hot water stopper stone 31 that is slidable within the guide hole 17 and the cylindrical body 14 is fixed.

Next, the operation of this embodiment will be explained. As shown in FIG. Place it on the holding groove 16 of the mold 2. At this time, when one end of the cylindrical body 14 is expanded into a trumpet shape (7) and the other end of the cylindrical body 14 is brought into contact with the stepped portion 21, one end of the cylindrical body 14 is placed in the recess 7 of the lower die 2. It protrudes into the part where the cavity 3 is to be defined.

Next, the upper mold 1 is lowered 1. When the mold is closed, the pressing piston 23 comes into contact 17 with the upper surface of the cylinder 14 and presses against the lower mold 2 12.
, the cylindrical body 14 is reliably held between the two holders mt 15 and 16. In this state, the cylinder 29 is driven to extend I7, and the stopper piston 31 is stopped at a predetermined position within the cylinder 14.

Therefore, as shown in Figure 1. By injecting molten metal into the hot water storage part 4 from the pouring port 12, and driving the next processing piston 9 upward,
Molten metal is pressurized and filled into the cavity 3 via the runner 5.

At this time, the molten metal does not flow into the cylinder 14 up to the portion regulated by the hot water stopping piston 31. Further, in order to suppress the generation of evacuation cavities during solidification of the molten metal, the secondary pressure piston 13 is lowered to apply local pressure.

When this state of pressurized filling of the molten metal into the cavity 3 continues for a certain period of time, the molten metal solidifies. Therefore, first, the cylinder 29 is retracted] 2 and the hot water stopper piston 31 is moved to the cylinder body 14.
Move backward from the inside and raise the upper mold 1. After further raising the knockout pin 11 and the primary pressure piston 9 and taking out the molded member 32 and the cylindrical body 14 from the lower die 2, the necessary finishing process is performed to form the cylindrical body as shown in FIG. A product in which the molded member 14 and the molded member 32 are integrally joined can be obtained.

In the embodiments described above, in order to ensure that the cylindrical body 14 is cast into the molding member 32, one end of the cylindrical body 14 is expanded into a trumpet shape. However, compared to other embodiments (7) and 17
Alternatively, slits may be provided or other deformation processing may be performed. Further, the cylinder 14 is not limited to a cylindrical shape, but may be square, and the shape of the molded member 32 is not limited to that shown in the drawings.

C0 Effects of the Invention As described above, according to the present invention, one end of the cylinder is inserted into the cavity and held between the upper mold and the lower mold.
Therefore, the cylindrical body is simultaneously cast into the molded member when the molded member is cast into the cavity, and therefore the cylindrical body and the molded member can be easily joined without going through a complicated process.

In the case of No. 17, a hot water stopping piston is slidably fitted inside the cylinder, so that more molten metal than necessary is prevented from flowing into the cylinder.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a longitudinal cross-sectional side view of the main part of the casting device, Fig. 2 is a longitudinal cross-sectional view of the cylinder and molded member after casting, and Fig. 3 is a longitudinal cross-section corresponding to Fig. 2 showing the conventional joint structure. It is a diagram. 1... Upper mold, 2... Lower mold, 3... Cavity, 1
5゜16...Retaining groove, 1γ...Guide hole, 18.19
... Guide groove, 31 ... Hot water stopper piston, 32 ... Molded member patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] Pouring molten metal 1. 1. Collaborate to form a cavity for casting a molded part. Each joint surface of the upper mold and lower mold defined by
Holding grooves for holding the cylindrical body with one end protruding into the cavity are provided, and a groove extending between the holding groove and the outer surfaces of the upper and lower molds corresponds to the inner surface of the cylindrical body. A casting device characterized in that guide grooves are provided to cooperate with each other to form guide holes, and a hot water stopper piston is disposed to slide into the guide holes and the cylindrical body.