JPS5893552A - Dies for casting of cylinder head - Google Patents

Abstract

PURPOSE:To provide titled dies which permit simultaneous casting of two pieces of cylinder heads and to improve productivity by combining the front, rear, right and left dies corresponding to two pieces of cylinder heads by positioning the top and bottom dies so as to face each other. CONSTITUTION:In dies 10 corresponding to two pieces of cylinder heads 1 having suction pipes 3, radiating fins 5, etc., cavities 12 corresponding to the side surfaces which are not formed with suction and exhaust port parts 2, 4 of the heads 1, and a part of the side faces which are formed with the suction port parts 2 are formed to a pair of the 1st dies 11, cavities 14 corresponding to the side surfaces having the exhaust port parts 4 are formed to a pair of the 2nd dies 13, and cavities 16, 18 corresponding to suction pipes 3 and the parts 2 are formed to the 3rd, the 4th dies 15, 17 which are top and bottom dies, respectively. Simultaneous casting of two pieces of the heads 1 is made possible by combining the dies 11, 13, 15, 17 so as to face each other.

Description

[Detailed description of the invention] It concerns casting technology.

Casting the cylinder head by die casting is preferable for mass production, but the surface shape of the cylinder head is relatively complex, and the mold side requires some ingenuity.

Conventionally, the mold for casting the cylinder head of an overhead valve type engine is as shown in Figs. 1 and 2.
Upper and lower molds 04 and 05 corresponding to the intake pipe 02 portion forming an intake port inside, a mold 06 corresponding to the side surface having the exhaust port portion 03, and the side surface having the intake pipe 02 and the exhaust port portion. It is composed of a pair of molds 07 that correspond to both sides except for the side with the intake pipe 02, and a part of the side with the intake pipe 02.Basically, casting is performed by combining the molds on the four sides. was going on.

Therefore, two cylinder heads were not cast simultaneously from one set of molds, and productivity was relatively low.

The present invention addresses the above-mentioned problems, and its purpose is to provide a highly productive mold that can simultaneously cast two cylinder heads.

The specific configuration of the present invention will be clarified by the description of the following examples.

That is, the cylinder head 1, which is the object to be cast, has heat radiation fins 5 formed over four sides, an intake port part 2 from which the intake pipe 3 is formed protrudingly, and an exhaust port part 4. The mold 10 of the example is configured such that both side surfaces of the two cylinder heads 1 having the intake boat portions 2 are cast in a state facing each other.

Therefore, the molds 11 of the pair of first molds include a side surface of the cylinder head 1 where the intake and exhaust port portions 2.4 are not formed, and a portion 2a of the side surface where the intake port portion 2 is formed. A pair of cavities 12 corresponding to the cylinder spatula 1 are formed, and a cavity 14 corresponding to the side surface of the cylinder spatula 1 where the exhaust port part 4 is not formed is formed in the pair of molds 13 serving as the second mold. ing. Furthermore, a pair of cavities 16.17 corresponding to the intake port portion 2, particularly the intake pipe 3, in the cylinder head 1 are formed in the upper and lower molds 15.17, which are the third and fourth molds. .

The mold 10 is constructed by integrally combining six molds 11, 13, 15, 17, and the mold 11, upper and lower molds 15, 17 have cavities for two cylinder heads. , it became possible to cast two cylinder heads 1 at the same time using the -set of molds 10.

As is clear from the description of the embodiments above, the mold of the present invention has the above-mentioned mold corresponding to one side of the cylinder head other than the side having the intake and exhaust ports, and a part of the side having the air supply boat. a pair of first molds having cavities for two cylinder heads; a pair of second molds having cavities corresponding to the side surfaces having exhaust ports of the cylinder heads; and a pair of second molds having cavities corresponding to the air supply boat portions of the cylinder heads. Consisting of a third mold and a fourth mold each having a pair of cavities, the pair of first molds and the pair of second molds are assembled in a rectangular shape front and rear, left and right, facing each other, In addition, by arranging the third mold and the fourth mold to face each other in the vertical direction and combining them with the respective rectangular molds, it is possible to cast two cylinder heads at the same time. Therefore, productivity improves.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing the correspondence relationship between a cast cylinder head and each known mold element, Fig. 2 is a schematic side view of the same, and Fig. 3 shows two cast cylinder heads and FIG. 4 is a schematic plan view showing the correspondence relationship with each mold element according to an embodiment of the present invention, and FIG. 4 is a side view of the same. l...Cylinder head, 2...Intake port section, 3
...Intake pipe, 4...Exhaust port section, 5...Radiating fin, 10.11...Mold, 12...Capity,
13... Mold, 14... Cavity, 15... Upper mold, 16... Capity, 17... Lower mold, 18
···cavity. Agent Patent attorney Nozomi Ehara 1 I 1 Museum 211

Claims (1)

[Claims] a pair of first molds having cavities for two of the cylinder heads corresponding to one side of the cylinder head other than the side having the intake and exhaust ports, and a part of the side having the air supply port; A pair of second molds each having a cavity corresponding to a side surface having an exhaust port of the cylinder head, and a third mold and a fourth mold each having a front pair of cavities, the pair of first molds;
and a pair of second molds, each facing each other and assembled in a rectangular shape in the front and rear, left and right directions, and the first mold and the fourth mold facing each other in the vertical direction to form the rectangular shape. A cylinder head casting mold that can simultaneously cast two cylinder heads when combined with a mold.