JPH07155916A - Formation of base plate member having pipe-like fluid passage on surface - Google Patents

Abstract

PURPOSE:To form a pipe-like fluid passage with less fluid resistance on the surface of dish-like body of a base plate member. CONSTITUTION:A wide recessed part a1 for forming the dish-like body of the base plate member is provided in a movable metallic mold Da, and also a cylindrical recessed part a3 is provided on the center part of this wide recessed part a1 and trough-like recessed parts a4, a5 for forming the fluid passage are provided on the right and left sides of the part a3. Pipe materials P connected to a slide members S and having uniform diameter or larger diameter at a deep end are arranged in the trough-like recessed parts. This movable metallic mold Da is joined to a fixing metallic mold Db and molten material of light metal or synthetic resin is injected and filled into a cavity between the both metallic molds, and after solidifying the molten material, the slide member S is separated from the pipe material P. Successively, the movable metallic mold Da is separated from the fixing metallic mold Db and the base plate member formed with the pipe-like fluid passage with less fluid resistance on the surface is obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a substrate member having a straight or bent pipe-shaped fluid passage having a low fluid resistance formed on a surface thereof.

[0002]

2. Description of the Related Art A substrate member having a pipe-shaped fluid passage on its surface, for example, a substrate member A for mounting equipment for cooling and purifying oil for lubricating a mechanical sliding portion of an engine on the engine side. It is as shown in FIG. 4, which is made of light metal or synthetic resin and has a downward-facing dish shape, and a flange A ₂ for fixing to the bracket B of the engine is provided around the lower opening of the dish-shaped body A _1. Is equipped with
On the other hand, dished on the surfaces of the body A _1, in the drawing with the central circular boss-like mounting seat A ₃ are provided mounting seat A ₃
And two pipe-shaped fluid passages A ₄ and A ₅ (however, one passage A ₄ communicates with the inside of the mounting seat A ₃ , but the other passage A ₅ is a blind hole). Has been.

On the base plate member A, a screw cylinder d is fixed at the center of the inside of the mounting seat A ₃ , and an oil filter F is mounted on the seat, while an oil filter is mounted on the lower side of the dish-shaped body A _1. A cooler C is attached, assembled on a bracket B of the engine via a flange A ₂ , and a fluid passage A ₄ on the left side is attached.
A blind lid (not shown) is applied to the outer end of the hose, and a hose h connected to an oil pump is connected to the outer end of the fluid passage A ₅ on the right side. , Through the hose h, into the fluid passage A ₅ on the right side, passing through the inlet vertical hole C ₁ of the oil cooler C communicating therewith, and then flowing from the right side to the left side through the cooler C to cool it to the required temperature. And enters the left side fluid passage A ₄ through the left outlet vertical hole C ₂ and enters the periphery of the filtration element e of the oil filter F from this passage A ₄ and then traverses the filtration element e to be purified to the central portion. Gathered in
It flows from the lower end to the sliding part of the engine.

The substrate member A is a combination mold of the movable mold D _a and the fixed mold D _b as shown in FIG. 5 (in the figure, it is shown in a vertical relationship, but it may be arranged in a left-right relationship). However, the movable mold D _a has a wide recess a ₁ forming a dish-shaped body A ₁ and a recess a ₂ for forming a flange A ₂ .
Cylindrical recess a ₃ for forming the mounting seat A ₃ and groove-shaped recesses a ₄ , a for forming the fluid passages A ₄ , A _{5 on the} surface of the dish-shaped body
₅ are provided, and further, these trough-shaped recesses a ₄ , a
₅ has a core pin S integrally formed with the slide member S.
₁ , S ₂ (the pin S ₁ on the left side is elongated so as to penetrate the recess a ₃ for forming the mounting seat), and such a movable mold D _a is used for forming the dish-shaped main body. It is fitted to a fixed mold D _b provided with a convex portion b ₁ and a small projection b ₂ for forming a hole leading to a fluid passage and a hot water passage, and a fixed mold D is provided in a void formed by both the concave portion and the convex portion. _After injecting and filling the melted light metal or synthetic resin through the nozzle n set to _b and solidifying the filling material, the slide member S is operated to insert the core pins S ₁ and S ₂ into the recess a ₄ , A ₅ and then the movable mold D _a is separated from the fixed mold D _b to take out the substrate member having the pipe-shaped fluid passage on the surface of the dish-shaped main body.

[0005]

By the way, in the above-mentioned conventional method of molding a substrate member having a pipe-shaped fluid passageway on its surface, a core pin is inserted into a passage-forming recess of a movable mold. Since the core pin is pulled out from the passage part after the filling material has cooled and solidified, it is essential that the core pin has an appropriate draft, and the diameter φ of the inlet end of the passage is ₁ must always be larger than the diameter φ ₂ at the back end, and when the length of the passage is considerably long, the diameter at the back end will become extremely small under a constant gradient, which will cause an increase in fluid resistance. A fluid passage having a relationship of φ ₁ ≤ φ ₂ or a curved fluid passage cannot be formed.

Therefore, an object of the present invention is to easily form a pipe-shaped fluid passage having a small fluid resistance or a bent fluid passage on the surface of a substrate member.

[0007]

Based on the above-mentioned object, the present invention provides a method for forming a substrate member having a pipe-shaped fluid passage on its surface, which is a recess for forming a dish-shaped main body of the substrate member in a movable mold. In the upper part of the channel-shaped recess for forming a fluid passage, connect a pipe member with a uniform diameter with both ends open or with the inner end closed or with a diameter at the inner end larger than the inlet end to the slide member. After that, the movable mold is fitted to the fixed mold having the convex portion for forming the dish-shaped main body, and a part of the pipe material is suppressed from above and below, so that the gap between the movable mold and the fixed mold is reduced. It is characterized in that a vacant space is injected and filled with a molten material of light metal or synthetic resin, and after the filling material is solidified, the slide member is separated and retracted from the pipe material, and then the movable mold is separated from the fixed mold.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a method for molding a substrate member according to the present invention will be described below with reference to FIGS. Figure 1
In the above, D _a is a movable mold, and as described above, a wide recess a ₁ for forming the dish-shaped main body of the substrate member, a shallow recess a ₂ for forming a flange on the open end side thereof, and a dish-shaped the fluid passage formed extending laterally be on the cylindrical recess a ₃ and recesses a ₁ for the dish-like body formed extending upward and located on the central portion of the recess a ₁ for body forming Conical recess a ₄ , a
_Five are provided.

Then, a groove-shaped recess a for forming a fluid passage is formed.
₄ and a ₅ are made of metal such as iron and aluminum or synthetic resin and have a uniform diameter or a diameter larger than the entrance end (in the figure), a pipe member P has a slide member at the entrance end. S
The pipe member P on the left side is open at both ends, is slightly longer than the pipe member on the right side, and has a rear end abutting the inner wall of the cylindrical recess a ₃ . The pipe members P on the right side are closed at the rear end, and these pipe members P are formed by a spring or a cylinder member into a groove-shaped recess a
It is held down by a downward projection a ₆ provided on the dish-shaped body so as to project and retract at a predetermined position in ₄ , a ₅ .

On the other hand, the fixed mold D _b is provided with a convex portion b ₁ for forming a dish-shaped main body, and at a predetermined position on this convex portion, that is, at a position corresponding to the downward projection a ₆ of the movable mold D _a. It is provided with an upward protrusion b ₂ capable of projecting and retracting by a spring or a cylinder member (this serves as a support for the pipe material at the time of molding and also as a guide for forming a hole leading to the fluid passage), and the molten material There is a hot water passage.

As described above, in the present invention, the movable die D _a
In the recesses a ₄ and a ₅ for forming pipe-shaped fluid passages, which are located on the recess a ₁ for forming the dish-shaped main body, a slide member S is provided with a pipe member of a required length for opening both ends or closing the rear end. After being inserted from the lateral direction, the movable mold D _a is aligned with the fixed mold D _b as shown in FIG. 2, and the pipe material P is fixed to the downward protrusion a ₆ of the movable mold D _a and the upward protrusion of the fixed mold D _b . b _{2 is} suppressed, and in that state, a molten material of a light metal or a synthetic resin is injection-filled into a space formed between the movable die D _a and the fixed die D _b, and after the filling material is cooled and solidified, As shown in FIG. 3, the slide member S is separated from the pipe material P and retracted, then the movable mold D _a is separated from the fixed mold D _b , and the fixed mold D is removed.
A substrate member having a pipe-shaped fluid passage on the surface of the dish-shaped body is removed from _b .

Thus, the pipe member P in which the pipe-shaped fluid passages A ₄ and A ₅ on the dish-shaped main body A ₁ are embedded with the pipe material P having a uniform diameter or a diameter at the inner end larger than the inlet end is embedded. A
However, when the oil cooler is arranged on the lower side of the dish-shaped main body A ₁ and a through hole communicating with this is required as described above, it was formed by the protrusion b ₂ of the fixed mold D _b . Using the hole as a guide, a hole may be drilled in the pipe material P with a drill,
On the other hand, the hole left by the projection a ₆ of the movable mold D _a does not hinder the flow of fluid, so it is left as it is.

In the above-mentioned example, the case where the recesses a ₄ and a ₅ for forming the fluid passage of the movable mold D _a are made linear and the linear pipe material P is arranged therein is explained. a
₄ and a ₅ are bent, and the bent pipe material P is inserted into the mold from the lower side or the side of the mold, and the slide member S is detachably connected to the outer end of the mold so that the pipe material P is If it is supported, a curved fluid passage can be formed on the dish-shaped body A ₁ .

Further, in the above-mentioned example, the one having two fluid passages was explained, but this may be one or three or more, and in the above-mentioned example, an oil filter is provided on the dish-shaped body. In the above description, the substrate member to which the oil cooler is attached has been described, but the present invention is not limited to this, and other devices may be attached.

[0015]

As described above, according to the present invention, as a method of molding a substrate member having a pipe-shaped fluid passageway on its surface, a fluid passageway located in a recess for forming a dish-shaped body of the substrate member in a movable mold is provided. A pipe member having a uniform diameter with its both ends open or its inner end closed or whose diameter at the innermost end is larger than the inlet end is placed in connection with the slide member in the forming trough-like recess. Aligning the movable mold with a fixed mold that has a convex portion for forming the dish-shaped body, and suppressing part of the pipe material from above and below, and using a light metal or synthetic material in the space between the movable mold and the fixed mold. Injection molding of molten material of resin, solidification of the filling material, separation and retraction of the slide member from the pipe material, and then separation of the movable mold from the fixed mold. , Even if the fluid passage is long, The pipe-shaped fluid passage low fluid resistance can be easily formed on the surface of the dish-like body,
Further, not only a straight one but also a curved fluid passage can be formed, which is industrially useful.

[Brief description of drawings]

FIG. 1 is an isolated cross-sectional view showing a state before molding of the present invention.

FIG. 2 is a sectional view showing a state during molding.

FIG. 3 is a separated cross-sectional view showing a state after molding.

FIG. 4 is a perspective view showing an example of a substrate member.

FIG. 5 is a cross-sectional view showing a conventional molding state.

[Explanation of symbols]

A substrate member A ₁ dish-shaped main body A ₂ flange A ₃ mounting seat A ₄ fluid passage A ₅ fluid passage D _a movable mold a ₁ wide recess a ₂ hollow a ₃ cylindrical recess a ₄ ribbed recess a ₅ Convex recess D _b Fixed mold b ₁ Convex P Pipe material S Slide member

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // B29C 45/14 8823-4F 45/36 7415-4F 45/40 7639-4F

Claims (1)

[Claims] Claim: What is claimed is: 1. One end of a movable mold having a diameter at which both ends are open or the inner end is closed in a groove for forming a fluid passage, which is located on a recess for forming a dish-shaped body of a substrate member. Such a pipe material or a pipe material having a larger diameter at the inner end than the inlet end is connected to the slide member, and thereafter, the movable mold is fitted to the fixed mold having the convex portion for forming the dish-shaped main body and the pipe material is arranged. Part of the above is suppressed from above and below, the space between the movable mold and the fixed mold is injected and filled with a molten material of light metal or synthetic resin, and after the filling material is solidified, the slide member is separated and retracted from the pipe material. Then, a method for molding a substrate member having a pipe-shaped fluid passage on its surface, characterized in that the movable mold is then separated from the fixed mold.