JPS61226160A - Pouring port bushing for die in die casting machine - Google Patents

Abstract

PURPOSE:To prevent water leakage and to improve durability by forming a bushing body into a front square shape, boring parallel holes for constituting cooling water paths and communicating both holes with a horizontal connecting hole. CONSTITUTION:The bushing body A is formed to the front square shape at the same thickness as the thickness of a diverter. The holes 5 for constituting the cooling water paths are bored by drilling in the lateral symmetrical positions from the bottom side surface of the body A and the connecting holes 6 communicating both holes 5, 5 are bored horizontally. After an internal screw 7 is formed to the inside surface in the aperture of the hole 6, a blind plug 8 is attached via a sealant thereto to close the aperture in a watertight state. Since the grooves for the cooling water paths can be formed by the simple drilling, the working accuracy is improved and the water leakage is prevented. The construction is simplified and the durability of the bushing is consequently improved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a mold spout push for a die casting machine.

<Prior art> Conventionally, this type of sewing-in pushbutton has a bushing body (A') with a shunt insertion opening (al') opened in the center thereof, as shown in Figs. 7 and 8. The cooling channel forming groove (5') is recessed in a ring shape on the circular arc line on one side surface centered on the axis of the shunt fitting socket (a1'). , one place in the groove direction of the ring-shaped groove (5') is partitioned with a partition member (20), and a ring-shaped cover body 21) is welded and attached to the ring-shaped opening of the groove (5°) to form a cooling water channel (a2'). ).

However, it is very troublesome and time-consuming to dig a groove for the cooling channel structure 1t (5°) to form the cooling channel structure (a2°), and furthermore, the ring-shaped opening of the cooling channel structure groove (5') The attachment number (21) that closes the part in a watertight manner is fixed by welding, so the welded part (22) is heated during injection of molten metal and cooled when the mold is cooled after injection. As a result of deterioration due to extreme (rapid) temperature changes, a gap occurs between the lid body (21) and the opening edge of the cooling channel constituting groove (5'), causing cooling water to circulate and flow through the cooling channel (a2'). This has become a major problem in this type of die casting industry as there is a risk that water may leak into the casting opening of the mold and have an adverse effect on injection.

<Internal problem to be solved by the invention> The problem to be solved by the invention is to provide a mold spout pusher that is easy to manufacture and has excellent durability without the risk of water leakage. That is.

<Means for Solving the Problems> The technical means taken by the present invention to solve problem F is to form the main body of the pusher 1 into a rectangular shape from the front with a predetermined thickness, and to divide the flow into the central part. At the same time as drilling the secondary insertion opening, cooling channel forming holes are respectively opened in parallel at symmetrical positions sandwiching the shunt insertion opening from the lower side surface of the outer periphery to the vicinity of the upper side surface. A communication hole that spans between the bottoms of the holes and connects both holes is opened horizontally from one side of the bushing body, and a blind plug is screwed into the opening of the communication hole in a watertight manner to form a cooling channel. It is characterized in that it is configured such that:

<Function> The present invention provides a bushing main body which is formed into a rectangular shape on the front with a predetermined thickness and has a shunt fitting insertion opening in the center portion, from the outer periphery lower side surface that sandwiches the insertion opening toward the vicinity of the upper side surface. At the same time, holes are drilled in the symmetrical positions of the cooling water channels, with the openings serving as the inlet or outlet of the chilled water, and a connection is made that spans horizontally between the bottoms of the internal holes to connect both holes. A hole is drilled from one of the side surfaces of the bushing body, and a blind plug is screwed into the opening of the communication hole in a watertight manner to form a front surface that spans almost the entire outer periphery of the shunt fitting socket. It constitutes a cooling waterway with an approximate shape.

<Example> To explain an example of the present invention based on the drawings, the bushing body (A) is attached and set to the injection port of the injection sleeve (2) fixed to the fixed mold (1) side, and (3) is placed opposite to a splitter (B) that is nested or protrudes from the same body, and when the two molds (1) and (3) are fitted together, the splitter (B)
B) forms a runner (4) that guides the melt to the cavity (16), and during cooling, the runner (4)
4) The molten metal in the section is cooled and hardened, and is formed into a rectangular shape in front with the same thickness as the protruding height of the shunt (B), with the shunt (B) protruding in the center part. A shunt fitting opening (al) having substantially the same shape as the shunt fitting opening (al) is bored, and a cooling water channel (a2) is formed on the outer periphery of the shunt fitting opening (al).

The cooling water channel (a2) is formed by drilling a cooling water channel forming hole (5) at a symmetrical position from the outer peripheral lower side surface to the vicinity of the upper surface of the bushing body (A) that sandwiches the shunt fitting opening (al).
<5), and the internal holes (5) (5)
A communicating hole (6) spans between the bottoms of the holes and connects both holes (5) (5).
) is drilled horizontally from one of the side surfaces of the bushing body (A>) to form a hole approximately in the shape of the front surface.

And, on the inner surface of the opening of the communication hole (6), there is a female screw (7).
A blind stopper (8) is screwed into the isthmus in a buried manner to open and close the core part in a watertight manner. At this time, use a blind stopper (8
) A tape-shaped sealing material (9) is wrapped in advance around the outer periphery of the connecting hole (6) and screwed onto the opening of the communicating hole (6) to prevent cooling water from leaking from the core.

In addition, the cooling waterway configuration hole <5 that constitutes the cooling waterway (a2)
) There is a cooling water circulation hose (10) on the inside of the opening of (5).
Female screws (12) for threadingly connecting the bushing body (A) are formed respectively, and bolts (13 )
A screw hole (14) for screwing and fixing is provided in the recess.

In this embodiment, the straight holes are drilled to form two cooling channel forming holes (5) (5) and one communicating hole 6) that connects the two holes (5) (5). By opening the holes, the cooling channel (a2) for circulating cooling water can be easily and easily fabricated, and the bushing body (A)
The outer periphery of the mold is formed into a rectangular shape from the front so that the mounting position relative to the fixed mold (1) can be easily adjusted.

That is, as shown in FIGS. 4 and 5, a fixed mold (1
The shape of the mounting part (15) provided at the front of the injection sleeve (2) of the bushing body (A) is formed into a roughly frontal shape extending from the upper side surface to the left and right side surfaces of the bushing body (A) (Fig. 5), and the mounting part (15) is 1
If the upper side surface of the bushing body (A) excluding the lower side surface and the left and right side surfaces are brought into contact with the three sides of the opening edge of the bushing body (A) in direct surface contact with the three sides of the opening edge of the bushing body (5), the bushing body ( A) The mounting position can be adjusted.

Furthermore, when the bushing body (A>) is attached to the fixed mold (1) shown in FIG.
This is another embodiment in which A) can be stably mounted and set in a fixed position of a fixed mold (1).

In addition, as shown in the figure, the bushing body (A) in the above embodiment has two cooling channels (al) in the thickness direction.
Although these are provided in parallel, if necessary, it is possible to provide more than one to increase the cooling effect. At this time, the wall thickness between the cooling channels (al) is made to be thick enough to withstand extreme (rapid) temperature changes between the heating temperature during injection of the melt field and the cooling temperature after injection.

<Effects of the Invention> As described above, the present invention forms the bushing main body into a rectangular shape in the front with a predetermined thickness, has a shunt insertion opening in the center part, and has an opening extending from the lower side of the outer periphery to the upper side. Cooling channel forming holes are drilled parallel to each other at symmetrical positions sandwiching the shunt fitting openings facing the vicinity, and a communication hole is provided between the bottoms of both horizontally drilled holes to connect the two holes. A hole is opened horizontally from one side of the bushing body, and a blind plug is screwed into the opening of the communication hole in a watertight manner to form a cooling waterway, so there is no need to dig a groove like in the past. In addition to eliminating the need for processing,
Welding to close the frontage becomes unnecessary. Therefore, the cooling water channel can be easily fabricated within the bushing main body, making it easy to manufacture the bushing main body, and there is no risk of water leakage etc. due to the absence of welded parts.

Further, by forming the outer circumferential shape of the bushing body into a rectangular shape from the front, it is easy to align the mounting position with respect to the mold as described in detail in the embodiments.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a front view with a part cut away, and FIG. 2 is a (II)--
(I) Line longitudinal sectional side view, Figure 3 is (III) - of Figure 1.
(I) A cross-sectional plan view, FIG. 4 is a perspective view, FIG. 5 is a longitudinal side view showing how it is attached to the mold, and FIG. 6 is a front view of the same.
FIG. 7 is a front view showing another embodiment showing how it is attached to the mold, FIGS. 8 and 9 show a conventional example, FIG. 8 is a front view with a part cut away, and FIG. 9 is (rX) in Figure 8
- (IX) line longitudinal cross-sectional side view. In the figure, (A): Push body (al): Shunt fitting insertion port (al): Cooling water channel (1) (3): Mold (5) (5): Cooling water channel configuration hole (6) Double series Channel hole (8): blind plug

Claims (1)

[Claims] The bush main body is formed into a rectangular shape from the front with a predetermined thickness, and a shunt fitting insertion hole is opened in the center portion of the bush body, and the shunt fitting insertion hole is inserted from the lower side surface of the outer periphery to the vicinity of the upper side surface. At the symmetrical positions of the bushings, cooling channel forming holes are drilled parallel to each other, and a communication hole extending between the bottoms of the two forming holes and connecting both holes is opened horizontally from one side surface of the bush body. A casting port bush for a mold in a die casting machine, in which a blind stopper is screwed into the opening of the communication hole in a watertight manner to form a cooling channel.