JPS63199047A - Method for setting core for casting cylinder head of internal combustion engine into die - Google Patents

Abstract

PURPOSE:To shorten setting work time of cores into a die, to improve the productivity and to save the labor by combining cores for suction and exhaust ports with core for water jacket by integrately connecting at each core print part and setting each core in the die at engaging part arranged in the die side. CONSTITUTION:In four cylinder engine having one cylinder and four valve, the port core is divided into the core 1 for suction port and the core 2 for exhaust port and each core group is integrately connected by each one piece of the core print part 103, 203. These suction and exhaust ports 1, 2 connected by the core print part, respectively are combined with in the core 3 for water jacket and after setting on the set pallet 4, sliding ores 15, 14 with moving to front/rear and right/left sides in the die 10 are advanced, and by the recessed part, etc., in the sliding cores of the die side, they are engaged. After that, a setting arm 9 is detached from the dies 10, and the upper die 11 is descended and matched with the lower die 12 to clamp the dies and casting of the cylinder head is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for setting a core for casting a cylinder head of an internal combustion engine into a mold.

(Prior Art) In the casting of cylinder heads for internal combustion engines, intake and exhaust port cores and water jacket cores are used, and these cores are placed in a mold to cast the cylinder head.

Conventionally, these cores are set in a mold using a water cage.
, it is necessary to set the core and manually set the intake and exhaust port cores one by one to the core, which is disadvantageous because it takes a long time.

Therefore, as shown in Utility Model Application Publication No. 57-132742, we developed a device that sets the water jacket core and the intake/exhaust port cores on a jig, suctions them with negative pressure, and sets them all at once in the mold. The applicant proposed earlier.

(Problem to be solved by the invention) In the above conventional technology, the cores can be set in the mold all at once, but it is necessary to set the intake and exhaust port cores in the jig one by one. The work has to be done by hand. 1 Workability is still not satisfactory. In particular, there is a tendency for the number of intake and exhaust parts to increase in order to improve engine output. An engine has as many as 16 intake and exhaust sections, and assembling them by hand would be inefficient.

The present invention has been made to solve the above problems, and its purpose is to enable accurate setting of these cores into molds in a short time, improve work efficiency, and improve production of cylinder heads. The aim is to improve performance and save labor, and at the same time, it is possible to easily and automatically set the cores by a robot.

(Means for solving the problem) The means for solving the above problem is to set intake/exhaust port cores and water jacket cores used in casting cylinder heads of internal combustion engines in a mold. In this method, the port core is divided into intake and exhaust core groups, each group of cores is connected together at a baseboard, the port core is combined with a water jacket core, and the port core is assembled with a water jacket core, The cores are set in the mold by engaging and supporting each core with the engaging portion provided in the mold.

(Effect of the above means) According to the above means, the intake/exhaust port core is integrally connected at the baseboard portion for intake and exhaust, so it is combined with the water jacket core, and therefore the core is for intake and exhaust. There are 3 pieces in total, 2 ports and 1 water jacket core, and they can be set in the mold all at once by engaging the core with the retaining part provided on the mold.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a perspective view of the port core, (1) shows the intake port core, and (2) shows the exhaust port core. The intake port core (1), which shows a four-cylinder engine, has a four-tree merging port portion (101) corresponding to the number of cylinders, and a bifurcated portion from the tip of each merging port portion (101). It has two exhaust port parts (102), (102) divided into two parts, and the two exhaust port parts (102), (102) have a convergence port part (101) where they merge into each other finely. A baseboard part (103) is formed at the base of each thick merging port part (101), and one baseboard part (103) is a merging port part (101).
- It is formed long in the parallel direction. The base (104) of each merging port part (101)... is integrally connected, and each merging port part (101)... is connected to the inner end surface (105) of one baseboard part (103). Continuous to the baseboard part (10
3), and therefore the port part alone (108
)... is connected to the baseboard part (103) and formed integrally with the baseboard part (103). , and an engagement recess (108) open to the outer surface and downward of the side surface.
, (108) are formed.

The exhaust port (2) has two exhaust port parts (202
), (202), a single port (20B) consisting of this and a contiguous four-tree merging port section (201)..., 1
A book baseboard portion (203) includes engagement recesses (208) and (208) provided on both sides of the baseboard portion (203).

The above intake/exhaust port cores (1) and (2) are assembled into the water jacket core (3), and engaged with both lengthwise sides (301) and (301) of the water jacket core (3). Projections (302) and (302) are provided in a protruding manner.

For example, the cores are set in the mold as follows, and the cores (1), (2), and (3) are set in advance on a jig, that is, a core set pallet (4) as shown in Fig. 5. Place the pallet (0 is the tip fixing part (5) of the port core (1), (2)
) are provided, for example, two spaced apart, and the tips (102a) and (2
02a) on the left and right recesses (5a) in the figure of the fixing part (5), (
5b) to support the port merging portions (101) and (201) of the port core and the baseboard portion (103).

(203), and further includes a fixing part (7) that supports the water jacket core (3). Place and support the water jacket core (3) on the fixed part (7), and insert the port core (1) from both sides.
), (2) are set through the space of the core (3).

As described above, set the set plate (0) on the tip (8) of the set arm (8) with the cores (1), (2), and (3) set, and place this on the upper and lower molds of the mold (lO). (11), (
12) Have them appear in between. Figure 2 shows the mold in an open state, with the upper mold (11) having cylinders (13) on both sides.
The sliding cores (14), (14) and the third
Sliding core (15) that opens and closes back and forth as shown in the figure (15)
and sliding cores (14), (14), (15), (1
5) is opened in advance, the set arm (8) is raised so that it faces between the cores, and the positioning pin (16) provided on a part of the arm (8) is inserted into the guide bush hole ( 1
7) and position it. Sliding core (14), (1
4) includes the port core (1) on the set plate (4),
It has four parts (18), (18) that engage with the baseboard parts (+03), (203) of (2), and the cylinder (13),
(13) to drive the sliding core (14).

(14) is moved forward, and the fourth part (18) and (18) are the baseboard part (103).

(203). As a result, the left and right intake/exhaust port cores (1) and (2) are connected to the cores (14) and (14).
It will be supported by

Next, the front and rear sliding cores (15) are advanced by a cylinder (not shown). The cores (15), (15) have positioning pins (19), (19) spaced apart left and right on opposing surfaces.
, and a recess (
20). Connect the pins (19) and (19) to the baseboard parts (103) and (20) of the left and right port cores (1) and (2).
3) Engagement recesses (108) and (20B) provided on both end faces of
Fit into the port core (1).

(2), and on the other hand, engaging protrusions (302) protruding from both end surfaces of the water jacket core (3).

(302) and the four parts (20) are fitted to perform positioning.

As described above, the sliding cores (14), (14), (15), (
After supporting the cores (1), (2), and (3) with 15), the set arm (8) is lowered and retreated, and separated from between the upper and lower molds (11) and (12). As shown in Figure 4, the upper mold (11) is lowered and the lower mold (12)
The cylinder head is then molded and the cylinder head is cast.

(Effects of the Invention) As is clear from the above, according to the present invention, the intake and exhaust ports are connected and integrated at the baseboard, so that they are engaged and supported by the recess of the sliding core on the mold side. Therefore, the conventional work of manually setting a large number of port cores one by one into a mold or setting jig is eliminated, saving labor.
In addition to significantly improving workability, the baseboard is made into one continuous piece, which is engaged and supported by a recess on the mold side of the sliding core, etc., so the core can be set using a robot. It has advantages such as being able to be automated and having a simple structure when automated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of the intake/exhaust port core, Fig. 2 is an explanatory plan view of the core support, and Fig. 3 is a diagram showing the core mold. FIG. 4 is a side view of the supporting state, and FIG. 5 is a side view of the core setting jig. In addition, (1) and (2) in the drawing are port cores, (108),
(208) is a baseboard part, and (14) and (25) are engagement parts of a mold. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Patent Attorney, Department
Udo Yama Patent Attorney No 1)
Shigeru 3rd river

Claims (1)

[Claims] A method of setting intake/exhaust port cores and water jacket cores used in casting cylinder heads of internal combustion engines in a mold, the port cores being used for intake/exhaust port cores,
The core groups are divided into parts for exhaust and are connected together at the baseboard part, and the port core is combined with the water jacket core,
A method for setting a core for casting a cylinder head of an internal combustion engine in a mold, characterized in that each core is engaged and supported by an engaging portion provided on the mold side and set in the mold.