CN216027999U

CN216027999U - Die for die-casting and forming of shell

Info

Publication number: CN216027999U
Application number: CN202122276604.7U
Authority: CN
Inventors: 姚灵敏
Original assignee: Ningbo Run Yao Machinery Co ltd
Current assignee: Ningbo Run Yao Machinery Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-03-15
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a die for die-casting a shell, which has the technical scheme that the die comprises a fixed die, wherein the fixed die comprises a die core, a middle template and a bottom template which are sequentially overlapped and fixed; three sliding sleeves are arranged in the mold core, inserting rods are arranged in the sliding sleeves in a sliding manner, and a piston cylinder for driving the inserting rods to be inserted into the mold cavity is arranged on the bottom template; after the mould die sinking, the inserted bar retracts into the sliding sleeve, and both the tip of the tip towards the die cavity of inserted bar and the tip of sliding sleeve towards the die cavity flush, adopt the inserted bar to retract earlier, wait for the die cavity to annotate the material and finish the back, push into the die cavity with the inserted bar top, make the casing in the die cavity form the mounting hole, and because the interior aluminium liquid that pours into the flow earlier of die cavity, the inserted bar mode of reinserting, the mounting hole position has had aluminium liquid before the inserted bar inserted, then when the inserted bar inserts the aluminium liquid extrusion compaction that will solidify the state with the mounting hole periphery.

Description

Die for die-casting and forming of shell

Technical Field

The present invention relates to a die, and more particularly, to a die for die-casting a housing.

Background

An engine is a machine capable of converting other forms of energy into mechanical energy, including, for example, internal combustion engines (reciprocating piston engines), external combustion engines (stirling engines, steam engines, etc.), jet engines, electric motors, etc.; such as internal combustion engines, typically convert chemical energy into mechanical energy. The engine is suitable for a power generation device, and can also refer to the whole machine (such as a gasoline engine and an aircraft engine) comprising the power device, the locomotive engine usually uses an aluminum alloy shell to ensure the service quality of the engine, and the production requirement is ensured by die casting in the production process of the aluminum alloy shell of the locomotive engine.

In the existing shell 8 in the engine shown in fig. 1, the thickness of the shell 8 is large, and the flowing speed of the injected aluminum liquid in the die casting process is slow; the key difficulty of the die casting process is that the shell 8 is provided with three mounting holes 81 for later connection, the hole diameter of each mounting hole 81 is relatively small, the three mounting holes 81 are protruded on the surface structure of the shell 8, and the flowing flow channel is small.

In the existing die casting process, when the aluminum liquid flows to the mold core 11 positions where the three mounting holes 81 are located, the aluminum liquid can slowly fill the mold core 11 positions where the mounting holes 81 are located, but because the thickness of the shell 8 is large, the flow channel at the position of the mounting holes 81 is small, the aluminum liquid at the position of the mold core 11 where the mounting holes 81 are located cannot be compacted, a large number of gaps exist, namely, air holes are easily formed in the peripheral hole walls of the mounting holes 81, and the problem that the structural strength of the hole walls of the mounting holes 81 is insufficient can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a die for die-casting and molding a shell, which adopts the mode that an insert rod retracts firstly, after the material injection of a die cavity is finished, the insert rod is pushed into the die cavity, so that a mounting hole is formed on the shell in the die cavity, and because the flowing aluminum liquid is injected into the die cavity firstly and then the insert rod is inserted, the aluminum liquid is already arranged at the mounting hole before the insert rod is inserted, and the aluminum liquid in the solidification state at the periphery of the mounting hole is extruded and compacted when the insert rod is inserted.

The technical purpose of the utility model is realized by the following technical scheme:

a die for die-casting and molding a shell comprises a fixed die, wherein the fixed die comprises a die core, a middle template and a bottom template which are sequentially overlapped and fixed; three sliding sleeves are arranged in the mold core, inserting rods are arranged in the sliding sleeves in a sliding manner, and a piston cylinder for driving the inserting rods to be inserted into the mold cavity is arranged on the bottom template; after the mold is opened, the inserted bar retracts into the sliding sleeve, and the end part of the inserted bar facing the mold cavity and the end part of the sliding sleeve facing the mold cavity are flush with each other.

Through adopting above-mentioned technical scheme, the advantage of this design is, utilize the free business turn over of piston rod control inserted bar in the die cavity, when die-casting, the inserted bar contracts, vacate the space for the narrow and small runner in mounting hole periphery, the aluminium liquid of being convenient for flows, because mounting hole position product thickness is great, still can form a large amount of spaces in the mounting hole position in the die cavity, nevertheless because aluminium liquid has been injected into to the station of inserted bar itself, make the aluminium liquid of mounting hole position by the compaction after the inserted bar inserts, the shaping compaction mounting hole structure in thicker die-casting casing has been realized, make the pore wall structural strength of mounting hole increase.

And through a plurality of tests, the insertion rod is inserted most properly when the aluminum industry in the mold cavity is injected within 0.3-0.7 second after the injection is finished, and the action can be finished through a PLC control system.

Preferably, a cylinder sleeve is arranged in the middle template, and a sliding core is matched and slides in the cylinder sleeve; the inserted rod is fixed at the sliding core, the inserted rod is inserted into the mold core from the cylinder sleeve, and a piston rod of the piston cylinder is fixedly connected with the sliding core.

By adopting the technical scheme, the cylinder sleeve and the sliding core are matched to slide, the sliding core is positioned in a sliding mode, and the inserted rod is fixed on the sliding core, so that the final purpose is to position the inserted rod in a moving mode, and the position deviation of the inserted rod in the moving process is reduced.

Preferably, the sliding core is in a triangular block shape as a whole, and the three inserted rods are arranged at the positions of three convex angles of the sliding core at equal intervals.

Through adopting above-mentioned technical scheme, the quantity of inserted bar is three, and because the three mounting hole position relation in the cooperation casing, consequently three inserted bar arranges into the triangle-shaped form, and smooth core arranges into the triangle block-shaped, be convenient for the inserted bar can be even arrange on smooth core for the frictional force that the side of smooth core received when sliding is close, reduces smooth core and takes place excessive friction because the frictional force that slides is uneven in the in-process that slides leads to smooth core side.

Preferably, the sliding core comprises three sides, the three sides form a triangular structure, and the three sides are outwards arc-shaped and protrude away from the center of the sliding core.

Through adopting above-mentioned technical scheme, the outside arc of side is protruding for the contact surface of side when increasing the sliding core and sliding, and its purpose is exactly more stable when sliding core slides.

Preferably, the sliding core comprises a first core block and a second core block which are arranged in a stacked manner, a bump is fixed at one end of the inserted rod, a first counter bore is arranged in the second core block, the inserted rod is inserted into the first counter bore, the bump abuts against a bore shoulder of the first counter bore, and the first core block is pressed on the first bump to clamp and fix the first bump by the first core block and the second core block.

Through adopting above-mentioned technical scheme, be convenient for demolish and the change of inserted bar.

Preferably, the mold core, the middle mold plate and the bottom mold plate are connected through screws; the cylinder sleeve is fixed on the mold core through a screw, and the bottom of the cylinder sleeve is in interference arrangement with the mold core.

By adopting the technical scheme, the cylinder sleeve, the mold core, the middle template and the bottom template are convenient to remove, and the inserted rod is convenient to replace.

Preferably, the mold core is equipped with the second counter bore that runs through towards the one side of cylinder liner, and the end fixing of sliding sleeve has the position sleeve, and in the sliding sleeve inserted the second counter bore, the position sleeve contradicted the hole shoulder of second counter bore, and the bottom of cylinder liner is equipped with the briquetting, and the briquetting contradicts in the border of position sleeve in order to realize cylinder liner and mold core centre gripping fixed position sleeve.

By adopting the technical scheme, the sliding sleeve is directly inserted into the second counter bore, and the positioning sleeve of the sliding sleeve is clamped and fixed by the convex block and the bore shoulder of the second counter bore, so that the sliding sleeve can be directly taken out after the cylinder sleeve is detached, and the cylinder sleeve is convenient to replace.

Because the speed that the inserted bar inserted into the die cavity is very fast, the wearing and tearing of inserted bar and sliding sleeve are great relatively, therefore the mould of this design needs to be changed inserted bar and sliding sleeve after using for a period.

Preferably, the end surface of the insert rod inserted into the die cavity is provided with a cross-shaped groove.

By adopting the technical scheme, the cross-shaped groove is used for forming the cross-shaped reinforcing rib at the bottom of the mounting hole.

Drawings

Fig. 1 is a schematic structural view of a die-cast product;

FIG. 2 is a schematic structural view of a stationary mold in example 1;

FIG. 3 is a schematic view showing the positional relationship among the mold core, the cylinder liner, and the bottom die plate in example 1;

FIG. 4 is a schematic view showing the exploded relationship of the mold core, the insert rod, the slide bush, and the cylinder liner in example 1;

FIG. 5 is a schematic view of the structure of the bottom of the cylinder liner in embodiment 1;

FIG. 6 is a schematic view showing a positional relationship when the cylinder liner interferes with the sliding sleeve in embodiment 1;

FIG. 7 is an exploded view of a slide core and a plunger in example 1;

FIG. 8 is a schematic view showing the structure of an insert pin according to embodiment 2;

fig. 9 is an enlarged view of a portion a in fig. 8.

In the figure:

1. fixing a mold; 11. a mold core; 12. an intermediate template; 13. a bottom form;

21. a sliding sleeve; 22. inserting a rod;

3. a piston cylinder;

4. a cylinder liner;

5. a sliding core; 51. a first core block; 52. a second core block; 53. a side surface;

61. a first counterbore; 62. a bump;

71. a second counterbore; 72. a positioning sleeve; 73. briquetting;

8. a housing; 81. mounting holes;

9. a cross-shaped groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, a die for die-casting a shell, referring to fig. 1 to 7, comprising a fixed die 1, wherein the fixed die 1 comprises a die core 11, an intermediate die plate 12 and a bottom die plate 13 which are sequentially fixed in an overlapping manner; the mold core 11, the middle mold plate 12 and the bottom mold plate 13 are connected through screws; the mold core 11, the middle mold plate 12 and the bottom mold plate 13 can be removed in sequence by unscrewing the screws.

In FIG. 2, a movable mold is arranged above a fixed mold 1.

The mold core 11 is provided with three through holes, three sliding sleeves 21 are inserted into the through holes, the sliding sleeves 21 are round cylinders, and the sliding sleeves 21 penetrate through the mold core 11;

the slide sleeve 21 has a plunger 22 slidably disposed therein, and the plunger 22 slides back and forth along the length direction of the slide sleeve 21 in the slide sleeve 21.

When the inserted rod 22 extends out, the inserted rod can pass through the sliding sleeve 21 and enter the die cavity;

when the plunger 22 is retracted, the plunger can pass through the sliding bush 21 and enter the mold cavity, and the end of the plunger 22 facing the mold cavity and the end of the sliding bush 21 facing the mold cavity are flush;

a cavity is arranged in the middle template 12, a piston cylinder 3 is accommodated in the cavity, and a cylinder body of the piston cylinder 3 is fixed on the bottom template 13 through a screw; a piston rod of the piston cylinder 3 is connected with the inserted rod 22, the piston cylinder 3 drives the inserted rod 22 to move in and out of the die cavity, and the piston cylinder 3 is a cylinder; after the mold is opened, the piston cylinder 3 drives the inserted link 22 to retract into the sliding sleeve 21.

A cylinder sleeve 4 is arranged in a cavity of the middle template 12, and the cylinder sleeve 4 is fixed on the back of the mold core 11 through a screw; the cylinder sleeve 4 is a circular sleeve, one end of the cylinder sleeve 4 is open, a sealing plate is fixed at the other end of the cylinder sleeve 4, and the inserted link 22 penetrates through the sealing plate to move.

A sliding core 5 is matched and glided in the cylinder sleeve 4, and the sliding core 5 can be positioned in the cylinder sleeve 4 to move back and forth;

the inserted bar 22 is fixed on the sliding core 5, the inserted bar 22 is inserted into the mold core 11 from the cylinder sleeve 4, the sliding core 5 is in a triangular block shape integrally, and the three inserted bars 22 are arranged at the positions of three convex angles of the sliding core 5 at equal intervals. The three inserting rods 22 are synchronously driven to move by adopting one sliding core 5, so that the synchronous performance of the reciprocating movement of the inserting rods 22 is ensured.

The slide core 5 includes a first core block 51 and a second core block 52 arranged one on another, a boss 62 having a circular cake shape is fixed to one end of the plunger 22, and the outer diameter of the boss 62 is larger than that of the plunger 22.

The second core block 52 is provided with a first counter bore 61, the insert rod 22 is inserted into the first counter bore 61 of the second core block 52, the protrusion 62 abuts against the hole shoulder of the first counter bore 61, and the first core block 51 is pressed on the first protrusion 62 to clamp and fix the first protrusion 62 by the first core block 51 and the second core block 52.

The first core block 51 and the second core block 52 are fixed as one body by screws;

the slide core 5 comprises three sides 53, the three sides 53 enclose a triangular structure, and the three sides 53 are arc-shaped and convex outwards away from the center position of the slide core 5.

A piston rod of the piston cylinder 3 is fixedly connected with the sliding core 5, and the piston cylinder 3 can drive the sliding core 5 to move back and forth in the cylinder sleeve 4;

the cylinder sleeve 4 is fixed on the mold core 11 through screws, and the bottom of the cylinder sleeve 4 is arranged in an interference mode with the mold core 11.

One surface of the mold core 11 facing the cylinder sleeve 4 is provided with a second counter bore 71, and the end part of the sliding sleeve 21 is fixed with a positioning sleeve 72; the positioning sleeve 72 and the sliding sleeve 21 are communicated with each other, and the outer diameter of the positioning sleeve 72 is larger than that of the sliding sleeve 21;

the sliding bush 21 is inserted into the second counter bore 71

The positioning sleeve 72 props against the hole shoulder of the second counter bore 71, a pressing block 73 is arranged at the bottom of the cylinder sleeve 4, the pressing block 73 props against the edge of the positioning sleeve 72,

the pressing block 73 and the hole shoulder of the second counter bore 71 clamp and fix the positioning sleeve 72, and the positioning sleeve 72 is positioned in the mold core 11. Because the positioning sleeve 72 and the sliding sleeve 21 are integrated, the sliding sleeve 21 is also stably fixed in the mold core 11.

The working principle is as follows: when in die casting, the inserted link 22 retracts to vacate a space for a narrow flow passage around the mounting hole 81, so that the flowing space of the aluminum liquid is enlarged, and the aluminum liquid can flow conveniently;

after the aluminum liquid is injected, the inserted bar 22 is inserted into the die cavity, and the aluminum liquid is injected into the station of the inserted bar 22, so that the aluminum liquid at the position of the mounting hole 81 is compacted when the inserted bar 22 is actively inserted, the mounting hole structure formed and compacted in the thicker die-casting shell is realized, and the structural strength of the hole wall of the mounting hole 81 is increased.

For the extension time of the insertion rod 22, the insertion rod 22 is properly inserted between 0.6 second after the molten aluminum in the mold cavity is injected, and the action can control the action of the piston rod through a PLC system.

Embodiment 2 is a die for die-casting a housing, which is different from embodiment 1 in that, referring to fig. 8 to 9, a cross groove 9 is formed in an end surface of an insert rod 22 inserted into a cavity, and a chamfer is formed in the cross groove 9. The cross-shaped groove 9 enables the bottom of the mounting hole 81 of the shell to form a cross-shaped groove, and the structural strength of the bottom of the mounting hole is improved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a be used for fashioned mould of casing die-casting, includes cover half (1), characterized by: the fixed die (1) comprises a die core (11), a middle die plate (12) and a bottom die plate (13) which are sequentially overlapped and fixed;

three sliding sleeves (21) are arranged in the mold core (11), inserting rods (22) slide in the sliding sleeves (21), and a bottom template (13) is provided with a piston cylinder (3) for driving the inserting rods (22) to be inserted into the mold cavity;

when the mold is opened, the inserted bar (22) retracts into the sliding sleeve (21), and the end of the inserted bar (22) facing the mold cavity and the end of the sliding sleeve (21) facing the mold cavity are flush.

2. The die set for die casting a housing according to claim 1, wherein: a cylinder sleeve (4) is arranged in the middle template (12), and a sliding core (5) is matched and slid in the cylinder sleeve (4); the inserted rod (22) is fixed on the sliding core (5), the inserted rod (22) is inserted into the mold core (11) from the cylinder sleeve (4), and a piston rod of the piston cylinder (3) is fixedly connected with the sliding core (5).

3. The die set for die casting a housing according to claim 2, wherein: the sliding core (5) is in a triangular block shape as a whole, and the three inserted rods (22) are arranged at the positions of three convex angles of the sliding core (5) at equal intervals.

4. A die for die casting a housing according to claim 3, wherein: the sliding core (5) comprises three side faces (53), the three side faces (53) form a triangular structure in a surrounding mode, and the three side faces (53) deviate from the center of the sliding core (5) and are outwards protruded in an arc shape.

5. A die for die casting a housing according to claim 3, wherein: the sliding core (5) comprises a first core block (51) and a second core block (52) which are arranged in a stacked mode, a protruding block (62) is fixed to one end of an inserting rod (22), a first counter bore (61) is formed in the second core block (52), the inserting rod (22) is inserted into the first counter bore (61), the protruding block (62) abuts against a hole shoulder of the first counter bore (61), and the first core block (51) is pressed on the first protruding block (62) in a pressing mode so that the first core block (51) and the second core block (52) can clamp and fix the first protruding block (62).

6. A die for die-casting a housing according to claim 4 or 5, wherein: the mold core (11), the middle mold plate (12) and the bottom mold plate (13) are connected through screws;

the cylinder sleeve (4) is fixed on the mold core (11) through screws, and the bottom of the cylinder sleeve (4) is in interference arrangement with the mold core (11).

7. The die set for die casting a housing according to claim 6, wherein: one side of the mold core (11) facing the cylinder sleeve (4) is provided with a through second counter bore (71), the end part of the sliding sleeve (21) is fixed with a positioning sleeve (72), the sliding sleeve (21) is inserted into the second counter bore (71), the positioning sleeve (72) abuts against the hole shoulder of the second counter bore (71), the bottom of the cylinder sleeve (4) is provided with a pressing block (73), and the pressing block (73) abuts against the edge of the positioning sleeve (72) so as to clamp and fix the positioning sleeve (72) between the cylinder sleeve (4) and the mold core (11).

8. The die set for die casting a housing according to claim 1, wherein: the end surface of the insert rod (22) inserted into the die cavity is provided with a cross groove (9).