JPH0233966Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a die-casting mold for forming a long cylindrical member such as a microphone body.

"Conventional technology" Conventionally, when casting long cylindrical members such as microphone bodies, it was not possible to obtain a large stroke of the slide core without using expensive hydraulic circuits or electric circuits, which had a complicated structure and were difficult to control. Nakatsuta. For this reason, there was a drawback that equipment costs were high.

In addition, since the slide core is moved by a hydraulic circuit or an electric circuit, processing time is required, and there is a drawback that efficient casting cannot be performed.

``Purpose of the present invention'' In view of the above-mentioned drawbacks of the conventional technology, the present invention has been developed to provide an inexpensive, simple structure that allows cast-molded products to be easily removed from the mold, enables efficient casting molding, and To obtain a die-casting mold for forming a cylindrical member such as a microphone body.

"Means for Achieving the Object of the Present Invention" The present invention includes a fixed mold, a movable mold that is provided on the fixed mold so as to be able to close and open the mold, and a combination of the movable mold and the fixed mold. A slide core provided between the slide core and the movable mold that slides upward; a cavity for molding a cylindrical member such as a microphone body formed between the slide core and the fixed mold and the movable mold; A runner formed in the fixed mold that guides the molten metal from the molten metal supply device, a first moving device that moves the slide core in the drawing direction when the mold is opened, and a moving device that moves the sliding core in the drawing direction when the mold is opened. It is characterized by comprising a second moving device that moves the slide core toward the fixed mold after the movement.

"Embodiments of the present invention" The present invention will be described in detail below with reference to embodiments shown in the drawings.

In the embodiment shown in FIGS. 1 to 3, 1 is a mold support frame attached to a die-casting machine main body (not shown), and this mold support frame 1 has a pair of support frames 2 and 3, and It is composed of four pillars 4, 4, 4, 4 stretched between the corners of support frames 2 and 3. 5 is a fixed mold fixed to the support frame 2.

Reference numeral 6 denotes a movable mold that is provided on the fixed mold 5 so as to be able to close and open the mold, and that slides along the pillar 4. Reference numeral 7 denotes a slide core interposed between the fixed mold 5 and the movable mold 6 and capable of sliding upward. 8 is the slide core 7 and the fixed mold 5
and a movable mold 6, which is a cavity for molding a cylindrical member such as a microphone body.

Reference numeral 9 denotes a runner formed in the fixed mold 5 that leads into the cavity 8 through a nozzle 10 of a molten metal supply device. Reference numeral 11 denotes a movable mold moving device such as a hydraulic cylinder that moves the movable mold 6 attached to the support frame 3 in the clamping mold opening direction.

Reference numeral 12 denotes a first moving device that slides the slide core 7 upward (in the extraction direction) when the mold is opened. and an inclined pin insertion hole 15 formed in the slide core 7 into which the inclined pin 13 is inserted.

Reference numeral 15 denotes a second moving device that moves the slide core 7 toward the fixed mold 5 after the first moving device 12 has moved upward;
Reference numeral 5 denotes a long hole 16 formed in the movable mold 6, and the frame after the movable mold 6, which passes through the long hole 16 and is fixed to the slide core 7, moves a predetermined amount in the mold opening direction. 3 and an extrusion pin 17 that comes into contact with the movable mold 6 and separates the slide core 7 from each other.

The die-casting mold for molding the cylindrical member such as the microphone body having the above-mentioned structure is made by pressing the movable mold 6 against the movable mold 5 with a predetermined pressing force by the movable mold moving device 11, as shown in FIG. Clamp as shown.

In this state, the molten metal supply device is operated to force the molten metal into the cavity 8 through the nozzle 10 and the runner 9. When the molten metal press-fitted into the cavity 8 solidifies, the movable mold moving device 11 is operated to separate the movable mold 6 from the fixed mold 5. This movable mold 6
Due to this movement, the slide core 7 also moves in the same direction as the movable mold 6, as shown in FIG.
The slide core 7 moves upward along the inclined pin 13. That is, this is because the cylindrical member 18, such as the microphone body, is attached to the movable mold 6 by casting. By this movement, the fixed mold 5 and the slide core 7 are detached from the cast cylinder member 18 such as the microphone body. When the movable mold 6 further moves in the mold opening direction, the extrusion pin 17 comes into contact with the support frame 3, and the slide core 7 separates from the movable mold 6. Due to this movement, the slide core 7 moves in the direction of the fixed mold 5 as shown in FIG. It comes off from the mold 6 and falls downward.

"Different Embodiments of the Present Invention" Next, different embodiments of the present invention shown in FIGS. 4 and 5 will be described. In the description of these embodiments, the same parts as those of the embodiments of the present invention are given the same reference numerals and redundant explanations will be omitted.

The embodiment shown in FIG. 4 is mainly different from the embodiment of the present invention in that the second moving device 15A is a hydraulic cylinder or an electromagnetic solenoid 19, and may be configured in this way.

The embodiment shown in FIG. 5 is mainly different from the embodiment of the present invention in that the push-out pins 17, 17 of the second moving device 15 are fixed to the support frame 3. It has similar effects.

"Effects of the present invention" As is clear from the above explanation, the present invention has the following effects.

(1) By using the first moving device and the second moving device that move the slide core, it is possible to remove the cast cylindrical member such as the microphone body from the mold and drop it downward. Therefore, the product is not left with contact marks of the ejector pin as in the conventional case. Therefore, a product with a clean surface can be cast.

(2) By using the first and second moving devices like the embodiments shown in FIGS. 1 to 3, it is not necessary to use special hydraulic circuits or electric circuits, so the cost can be reduced.

(3) By using (1) and (2) above, it is possible to cast and mold inexpensive cast products with high commercial value.

(4) Since the slide core is slid upward,
Even with a small stroke, a cast cylindrical member such as a microphone body can be removed from the mold. Therefore, the mold can be made smaller and more compact.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention;
2 and 3 are schematic sectional views showing the operating state, and FIGS. 4 and 5 are schematic sectional views showing different embodiments of the present invention, respectively. 1: Mold support frame, 2, 3: Support frame, 4: Support column, 5: Fixed mold, 6: Movable mold,
7: Slide core, 8: Cavity, 9: Runway,
10: Nozzle, 11: Movable mold moving device, 12:
First moving device, 13: Inclined pin, 14: Inclined pin insertion hole, 15, 15A: Second moving device, 1
6: long hole, 17: extrusion pin, 18: cylindrical member.

Claims (1)

[Claims for Utility Model Registration] 1. A fixed mold, a movable mold provided on the fixed mold so that the mold can be clamped and opened, and an upper mold provided between the movable mold and the fixed mold. a cavity for molding a cylindrical member such as a microphone body formed between the slide core and the fixed mold and the movable mold;
a runner formed in the fixed mold that guides the molten metal from the molten metal supply device into the cavity; a first moving device that moves the slide core in the removal direction when the mold is opened; and the first moving device. A die-casting mold for molding a cylindrical member such as a microphone body, comprising a second moving device for moving the slide core toward the fixed mold after the slide core is moved in the extraction direction. 2. The first moving device is comprised of an outwardly inclined inclined pin implanted in the fixed mold, and an inclined pin insertion hole formed in the slide core that engages with the inclined pin. A die-casting mold for forming a cylindrical member such as a microphone body as claimed in claim 1. 3. Utility model registration claim 1, characterized in that the second moving device is an extrusion pin fixed to the slide core that comes into contact with the support frame and separates the movable mold and the slide core when the mold is opened. A die-casting mold for forming a cylindrical member such as a microphone body according to item 1 or 2.