JPS5947060A - Casting die - Google Patents

Abstract

PURPOSE:To cast a die cast product having excellent quality without ejecting molten metal for cating from vents, by providing vents having a specific inclined shape in the outside peripheral part of the casting cavity of dies for die casting. CONSTITUTION:Dies for die casting are contituted of a stationary die 1 and a movable die, and many grooves 3 having a shallow U-shaped section at 45 deg. angle of inclination are provided in parallel as vent grooves in the outside peripheral parts of the cavity 2 of the die 1 and the cavity of the movable die. One end on the outside circumference of both cavities in the positions where the grooves 3 cross diagonally is communicated with the respective cavities and the other end is provided toward the outside. A mating face A wherein many grooves 3 are intersected and crossed diagonally and the remaining surface 4 of the same level as said face are provided in the midway. The parting plane in the outside peripheral position where the grooves 3 are diagonally recessed is recessed and the non-contact surface 5 is recessed while leaving only the peripheral edges 6 of both dies. Molten metal is cast under pressure into the cavity 2 through a casting port 8, whereby the die cast product having good quality with the gas vented is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a VJ mold for use in die casting. Conventionally, it has been common practice in the casting industry to provide a gas vent cavity that is connected to the entire vent cavity for extracting the air in the mold when the molten metal is fully pressurized, but the cross section of the gas vent hole is It is easy to vent the gas if rJ is made large, but it cannot be made large because there is a risk of the molten metal blowing out, and there is a certain base.Moreover, in the conventional gas vent hole, the passage i71] in the hole is usually 16 lines. Because of this structure, the molten metal ejected from the cavity side at high pressure is at high speed,
It flows as a laminar flow along all the parallel planes in the gas vent hole, so the part of the outer periphery that comes into contact with the mold surface is difficult to cool and solidify.
This part becomes a semi-fluid and scatters in the nt+ direction, and the solidification distance is not only unstable, but also the closer it is, the more some parts are weak after solidification (# Part with short IIJI distance)
If the solidification pattern is broken, the subsequent molten metal will gush out only in the remaining layer ratio, and there is a concern that it will lead to an unexpected situation. . Therefore, for safety reasons, it is unavoidable to reduce the cross-sectional area of the gas vent hole, or to reduce the distance of the gas vent hole.
However, when the cross-sectional area of the waste removal hole was made smaller, the gas could not escape completely.
When the distance of the gas removal hole is increased, the area of the die split surface increases, and the rate of contaminants (clumps of molten metal, etc.) being trapped between the split surfaces of all dies increases. He had to stop the operation of the pipe and carry out the removal work, and was concerned about the problem that if the machine continued to be operated in an uncontrolled manner, the molten metal would come out and cause problems. The present invention solves all such problems and can significantly shorten the distance 1f of the gas vent hole, and by reducing the total contact area of both the dividing surfaces of the solid 2t die and the ijj dynamic die, there is no possibility of foreign objects getting caught. (
・Since it is C, the gap between the mating surfaces should be OVCJ-il.
Therefore, it is possible to maximize the gas vent hole without leaving the gap J2 and the molten metal flying. This was invented for the purpose of creating a stable product with no clogging and fewer cavities.
(1) is a fixed mold, and (2) is a fixed mold that is poured into the device approximately in the center of the fixed mold. 3, 3... is fixed fill Gabiday 2 outside 11
IlJ position, inside 11]] Ichinoi17 is KiV Biday 2
The other end (111k) is tilted diagonally in the 45 direction, and the cross section is formed into a shallow U-shaped groove. It is an enemy.

4, the - tapping li is fixed type cabiity 2' 114 through, the other - Q high toll is set outward, ic I;
A lot of cross-crossings) 1 evening in 11 rows [regular intervals? There are 77 remaining sides at the same level as Tomoaai Ze side A. (5) Between the outer circumference fX++ of the slanted groove 3 and the periphery 6 of the fixed die 1, mark 1 on the dividing surface of the fixed die 1)
There is one river of non-bundling that has been collected. 7, fixed kahivui 2 J
19 piles were installed, and the female part 8 was connected to the hot water 1'' 7, and the 7 pieces were placed in communication with 7. The guides were planted near the four corners of the fixed die. It's a bottle.

10&; 11C1 Vacuum suction groove 10
One end is in communication with the other end, and the other end is a direct air suction hole that is led out of the fixed mold. 12 is i, i4 moving mold, 1
; 3 is a movable mold with a recess protruding from the center position e7
It is a screaming salmon cavity.

14, J, 4...Is, 'tiJ' j Reno IIQ
At the outer position of the cavity 13, one inner end is movable (II
It communicates with the i1 cavity 113, and the other end side rJ is connected to the
Inclined in the direction CC, the cross section is formed into a shallow U-shaped groove, with a large number of parallel gas vent inclined grooves.

One end of 15 is connected to the cavity 13, and the other end is provided facing the direction of the sun, and in the middle, the slanted grooves for scraping [4] mentioned above are crossed and parallel to each other to soften the situation. This is the remaining surface of the "Reheno" surface, which is the same as the mating surface A that was installed in the .

16 is a square-shaped flat part between the outer periphery of the gas venting inclined groove 14 and the edge 17 of the +ij moving titice 12, which is completely recessed.
○18, which is the non-contact surface formed by 114, is a hot water 1 provided in communication with the pressure side cavity 13, and 19 is a hot water, I J
, 8 and Rentsu'T, installation I-J and casting 1.

20.2f+...1, four corners iXi of the movable die
This is a bottle hole drilled in the vicinity and in front of the guide bins 9, 9, . . . The present invention has a structure in which the fixed mold 1 (171) and the movable mold mold I2 fit together, and the scrap removal slope is The rNj14 intersect each other diagonally, creating a large space between the J1 contact surface 5 and the non-contact surface 16.Therefore, unlike the conventional product, the molten metal U is
The hot water enters into the cavity 2 from the lower part of the hot water, and then it is ejected toward the diagonally opposing gas vents q: 3 and 14, but in this case the waste removal slope γ + Tf: 3 and 14.
The molten metal that has entered each will turn to the output side and advance + jrlf
41i' The inner J (the parts facing 11 collided with each other many times, and the missing part)
At each intersection, the bathwater is forcibly stirred as it advances diagonally, acting in a torsional direction 9 times horizontally. Facing diagonally? In order to proceed by changing the flow, the most agitated bath water is prevented from becoming a laminar flow and the outside 111! Fill L, therefore, the laminar flow of the molten metal eliminates the extreme cooling difference between the □ surface and the inside J of the molten metal, and suppresses the thrusting chips from each other. Therefore, by eliminating the sharp cooling difference between the surface and the inside of the mold contact due to the laminar flow of the molten metal, and combined with the mutual restraining effect of the thrust force, some semi-solid parts break and the molten metal flies away. There is no need to worry about such unexpected situations occurring, and therefore, the total area of the waste removal inclined groove 3 and waste removal inclined groove 14 provided around the gear, bit, and r can be significantly reduced. There is also a concern that hot water or chips will come out on the outside dividing surface.
] The present invention, which requires full contact, has 5 non-contact surfaces and 16 non-contact surfaces to create a space, or r + 4 functions, and in the conventional public type, this part was used for the purpose of a mass of bath water, etc. Not only did this hinder the abutment of both kettles, but also the danger of the hot water spewing out.It is now possible to create a wide space with a wide division tn + t41 of the turret, which prevents molten metal from spewing out. The danger of
This invention greatly contributes to work efficiency and product quality.

[Brief explanation of the drawing]

FIG. 1 shows an example of the implementation of the present invention.
This is a front view seen from the dividing surface side. FIG. 2 is a front view of the movable mold seen from the dividing surface side. FIG. 3 is a longitudinal sectional view of the fixed and movable molds, and FIG. 4 is a side view showing the fixed and +IJ movable molds in a combined state. ■・・・Fixed pot type 2・・Standing foot side gap 3・・Gassing sloping groove 4・・Remaining surface 5・Curn・Non-contact surface 6・・Periphery 7.11+1・Hot water [J 8 ... Casting port 9- ... Car f Tobi / 10 ... Vacuum suction groove ii ... Vacuum suction hole 12 ... RoJ moving mold 13 ... Movable side cavity 14 ... Scrap removal Chita[? 15... Remaining surface 16... Non-contact surface 17... Periphery 18... Sprue 19... Casting port 20... Pin hole Figure 4

Claims (1)

[Claims] (1) On the outer periphery of the fixed side cavity and the movable side cavity, which are provided by protruding depressions on the dividing surface side of each of the fixed mold and the movable mold, one inner end communicates with the cavity and the other end is free. 'F Tilt diagonally in the 45 direction and cut i? A large number of gas removal inclined grooves 3 and 14 are recessed in parallel in a shallow U-shaped groove, and the fixed side and movable side cavities are formed at positions where the gas removal inclined grooves 3 and 14 diagonally cross. On the outer periphery, one end communicates with each cavity, and the other end is a surface on the same level as the mating surface A, which is provided toward the outside, and in the middle is made to diagonally cross many of the waste removal inclined grooves 3 and 1 and 4. The remaining surfaces 4 and 15 of
The dividing surface at the outer circumferential position of the diagonally paved surface is recessed to form a non-contact surface 5 leaving only the periphery 6 and 17 of the fixed and movable molds.
Fishing mold 0 characterized in that 16 and 16 are each provided with a recess.