JPH0415408Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a holding device for a casting fitting when a casting fitting such as a bearing support collar is integrally cast in a transmission case or an engine case.

(Prior Art) Conventionally, as shown in FIGS. 1 and 2, a casting fitting c attached to a surface of a movable mold a facing a product cavity b is attached to a fixed mold d. It is known that the pressure is applied by pressing pins e provided facing each other, and in this case, the pressing pins e are generally fixed to the fixed mold d.

(Problems to be solved by the invention) In the above conventional product, a hole deep enough to reach the casting fitting c is formed in the product due to the presence of the pressing pin e, and the external There is a problem in that it is necessary to fill with a filler such as a synthetic resin material in order to prevent leakage of oil or the like. This idea is
The purpose is to provide a device that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a casting fitting attached to the surface of the movable mold facing the product cavity, which is mounted on a fixed mold so as to face the casting fitting. In a product that is pressed by a pressing pin, the pressing pin is biased by a spring toward the casting fitting, and the pressing pin is moved back against the spring by the pressure of the molten metal in the product cavity. It is characterized by being provided with pressure responsive means.

(Example) The invention will now be described with reference to illustrated embodiments.

In the drawings, reference numeral 1 indicates a movable mold, and reference numeral 2 indicates a fixed mold, and a casting fitting 4 attached to the surface of the movable mold 1 facing the product cavity 3 is placed in the fixed mold 2 so as to face the casting fitting 4. The pressure is applied by a pressing pin 5 provided in the same manner as shown in FIG.

In accordance with the features of the present invention, the pressing pin 5 is biased by a spring 6 on the side of the casting fitting 4, and the pressing pin 5 is pressed against the spring 6 by the pressure of the molten metal in the product cavity 3. A pressure responsive means 7 is provided for resisting and retreating.

To explain this in detail, the pressure responsive means 7
The one shown in FIGS. 5 to 5 consists of a pressure-receiving surface 7a constituted by a step formed at the tip of the press pin 5 facing the product cavity 3, and the press pin 5 is provided on the tail end side of the pressure-receiving surface 7a. The cast fitting 4 of the spring 6
I tried to bias it to the side. Further, in the one shown in FIGS. 6 to 8, the pressure responsive means 7 includes a piston 7c having a pressure receiving surface 7b at the tip facing the product cavity 3.
The pressing pin 5 is fixed at the tail end to the flange 7d at the tail end of the piston 7c, and the piston 7c is biased toward the casting fitting 4 by the spring 6 provided on the tail end side. I made it. Incidentally, although the pressing pins 5 are not shown, a plurality of pressing pins 5 may be provided as appropriate.

(Function) The casting fitting 4 attached to the surface of the movable mold 1 facing the product cavity 3 is pressed by the pressing pin 5 provided on the fixed mold 2 when both molds 1 and 2 are closed, and vibrations are generated. There is no possibility that the casting fitting 4 will be displaced or fall off due to such factors. When the molten metal is injected into the product cavity in this state, the casting fitting 4 is pressed and fixed in a regular position by the molten metal pressure, while the pressing pin 5 is pressed against the spring 6 by the molten metal pressure applied via the pressure responsive means 7. The casting fitting 4 is integrally cast without forming a hole deep enough to reach the casting fitting 4 in the product as in the conventional case.

(Effect of the invention) As described above, according to the invention, the pressing pin is biased by a spring toward the casting fitting side, and the pressing pin is moved back against the spring by the pressure of the molten metal in the product cavity. A pressure-responsive means is provided, and the press pin can be moved back against the spring by the molten metal pressure in the product cavity acting through the pressure-response means, and the product reaches the cast metal fitting like the conventional one mentioned above. Since deep holes are not formed, filling work with filler is not required, which has the effect of improving productivity.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of the conventional example, Figure 3 is a cross-sectional view of the main parts of a mold equipped with the device of the present invention in a closed state, and Figure 4 shows the injection of molten metal into the cavity. 5 is a sectional view of the mold opened state, and FIGS. 6 to 8 are sectional views corresponding to the states of other embodiments shown in FIGS. 3 to 5. . 1...Movable mold, 2...Fixed mold, 3...Product cavity, 4...Casting metal fitting, 5...Press pin,
6... Spring, 7... Pressure responsive means.

Claims (1)

[Scope of utility model registration request] In a device in which a casting fitting attached to the surface facing the product cavity of a movable mold is pressed by a pressing pin provided opposite to the casting fitting on a fixed mold, the pressing pin is pressed against the casting fitting. What is claimed is: 1. A holding device for a casting fitting, characterized in that the device is biased by a spring on the side and is provided with a pressure responsive means for retracting the pressing pin against the spring by the pressure of molten metal in the product cavity.