CN215746346U

CN215746346U - Die for die casting shell

Info

Publication number: CN215746346U
Application number: CN202122265872.9U
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: 2022-02-08
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 movable die plate, wherein the movable die plate is provided with a die core, a circular hole and a oval hole are formed in the die core, a first forming rod is inserted into the circular hole in a matched manner, and a second forming rod is inserted into the oval hole in a matched manner; the first forming rod comprises a first exhaust passage, the gap between the first exhaust passage and the hole wall of the circular hole is 0.075cm, a first main exhaust passage communicated to the outside of the movable template, the first main exhaust passage and the first exhaust passage are arranged between the first forming rod and the circular hole; the second molding pole includes the second exhaust passage, and the pore wall clearance of second exhaust passage and waist round hole is 0.075cm, is equipped with the main exhaust passage of second outside leading to the movable mould board between second molding pole and the waist round hole, and the main exhaust passage of second and second exhaust passage will feed through the first exhaust passage of die cavity and the exhaust clearance control of second exhaust passage and be 0.075cm, because the clearance is less, in the viscidity of aluminium liquid self makes the aluminium liquid that flows can't enter into first exhaust passage and second exhaust passage, but can effectively exhaust.

Description

Die for die casting shell

Technical Field

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

Background

The die-casting die is a tool for casting metal parts, and is a tool for completing a die-casting process on a special die-casting die forging machine. The basic process of die casting comprises the following steps: molten metal is cast at low speed or high speed and filled into the cavity of the mold, the mold has movable cavity surface, and it is pressurized and forged along with the cooling process of the molten metal, so that the shrinkage cavity and shrinkage porosity defects of the blank are eliminated, and the internal structure of the blank reaches the broken crystal grains in the forged state.

Now as shown in fig. 1, a housing 61 of a large machine, because a thickness of the housing 61 is large, a speed of a hot-melt aluminum liquid flowing in a mold cavity is slow, in fig. 1, a circular hole 62 and a circular waist-shaped hole 63 are formed inside the housing 61, and the two holes protrude from the inside of the housing 61, a mold cavity flow passage where the aluminum liquid flows through the circular hole 62 and the circular waist-shaped hole 63 is small in a die casting process, and because the circular hole 62 and the circular waist-shaped hole 63 are in the middle of the mold cavity, exhaust difficulty is high, and residual gas causes a gap to be formed in hole walls of the circular hole 62 and the circular waist-shaped hole 63 after die casting, resulting in insufficient structural strength of the hole walls of the circular hole 62 and the circular waist-shaped hole 63.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a die for die-casting a shell, which controls the exhaust clearance of a first exhaust passage and a second exhaust passage which are communicated with a die cavity to be 0.075cm, and can effectively exhaust air because the clearance is smaller and the flowing aluminum liquid cannot enter the first exhaust passage and the second exhaust passage due to the viscosity of the aluminum liquid.

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

a die for die-casting a shell comprises a movable die plate, wherein the movable die plate is provided with a die core, a circular hole and a waist-round hole are formed in the die core, a first forming rod is inserted into the circular hole in a matched mode, and a second forming rod is inserted into the waist-round hole in a matched mode; a first exhaust passage is arranged on the outer wall of the first forming rod, the gap between the bottom surface of the first exhaust passage and the hole wall of the circular hole is 0.075cm, the first exhaust passage points to the mold core, a first main exhaust passage communicated to the outside of the movable mold plate is arranged between the first forming rod and the circular hole, and the first main exhaust passage is communicated with the first exhaust passage; and a second main exhaust passage communicated to the outside of the movable template is arranged between the second molding rod and the oval hole, and is communicated with the second exhaust passage.

Through adopting above-mentioned technical scheme, the exhaust clearance control with the first exhaust passage of die cavity intercommunication and second exhaust passage is 0.075cm, because first exhaust arranges around first shaping pole, because the second exhaust passage arranges around the second shaping pole, 0.075 cm's exhaust clearance can effectually be with the peripheral gaseous exhaust of first shaping pole and second shaping pole, and because the clearance is less, in the viscidity of aluminium liquid self makes the mobile aluminium liquid can't enter into first exhaust passage and second exhaust passage, just so realized can exhaust and not leak out the effect of aluminium trade.

The reason that the other first main exhaust passage is connected with the first exhaust passage and the second main exhaust passage is connected with the second exhaust passage is that the exhaust gap of 0.075cm is small, and the processing difficulty is large, so that the exhaust gaps of the first main exhaust passage and the second main exhaust passage can be freely enlarged as required by using the first main exhaust passage and the second main exhaust passage as the rest exhaust paths.

Preferably, first shaping pole is equipped with first shaft shoulder, and first shaft shoulder is located the open position of circular port, and the open position of circular port and first shaft shoulder all are equipped with first chamfer, and the first chamfer of circular port and first shaft shoulder two places is arranged with one heart inside and outside and is formed first air guide way.

By adopting the technical scheme, the opening position of the circular hole is used for discharging gas in the core, so that the first chamfer at the opening has a drainage function; the first shoulder of axle is protruding to the outside open-ended border, and consequently, the first chamfer incline direction of first shoulder and the incline direction of the first chamfer of opening part are opposite, form into first air guide way, are favorable to gaseous quick discharge.

Preferably, the second forming rod is provided with a second shoulder, the second shoulder is located at the opening position of the waist circular hole, the opening position of the waist circular hole and the second shoulder are both provided with second chamfers, and the second chamfers at the two positions of the waist circular hole and the second shoulder are arranged concentrically inside and outside to form a second air guide channel.

Through adopting above-mentioned technical scheme, the chamfer of arranging inside and outside forms the second and leads the gas channel, is favorable to gaseous quick discharge.

Preferably, the first main exhaust passage comprises a first annular air passage and a first straight air passage; the outer wall of the first forming rod is provided with a circular ring to form a first annular air passage; the outer wall of the first forming rod is provided with a tangent plane along the axis to form a first linear air passage; the first annular air passage is communicated with the first exhaust passage and the first linear air passage.

Through adopting above-mentioned technical scheme, outside first straight line air flue can the intercommunication mould, the exhaust of being convenient for, the first air discharge way of two first annular air flues can communicate different positions is favorable to quick exhaust.

Preferably, the first air vent passage is provided in plurality, and the first air vent passage is arranged at equal intervals along the circumferential direction of the first molding bar.

By adopting the technical scheme, the first forming rod is convenient to uniformly exhaust air around the first forming rod.

Preferably, the second main exhaust passage comprises a second annular air passage and a second linear air passage; the outer wall of the second forming rod is provided with a circular ring to form a second annular air passage; the outer wall of the second forming rod is provided with a tangent plane along the axis to form a second linear air passage; the second annular air passage is communicated with the second exhaust passage and the second linear air passage.

Preferably, the number of the second exhaust passages is 2, and the 2 second exhaust passages are located on the side plane of the second forming rod.

Through adopting above-mentioned technical scheme, be convenient for the peripheral even exhaust of second shaping pole.

Preferably, the mold core is provided with a plurality of hemispherical grooves, and the hemispherical grooves are arranged annularly around the end faces of the circular hole and the waist circular hole.

By adopting the technical scheme, the hemispherical groove is used for filling aluminum liquid to form the reinforcing block for enhancing the structural strength.

Preferably, the hemispherical recess encloses 2 rings.

By adopting the technical scheme, 2 circles of arrangement are used for increasing the number of the reinforcing blocks.

Drawings

FIG. 1 is a schematic structural view of a die-cast housing;

FIG. 2 is a schematic structural diagram of a movable die plate in the embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of a first molding bar in the embodiment;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic structural view of a second molding bar in the embodiment;

FIG. 7 is an enlarged view of section C of FIG. 6;

FIG. 8 is a schematic structural view of the movable platen of the embodiment after the first and second molding rods are removed;

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

In the figure:

1. moving the template; 11. a mold core;

21. a first molding bar; 22. a second molding rod;

31. a first exhaust duct; 32. a first main exhaust passage; 321. a first annular air passage; 322. a first linear air passage; 33. a first shoulder; 34. a first chamfer;

41. a second exhaust passage; 42. a second main exhaust passage; 421. a second annular air passage; 422. a second linear air passage; 43. a second shoulder; 44. a second chamfer;

51. a first air guide passage; 52. a second air guide passage;

61. a housing; 62. a circular hole; 63. a waist-round hole;

7. a circular hole; 8. a lumbar circular hole; 9. a semi-spherical groove.

Detailed Description

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

An embodiment of a die for die-casting a housing will be described with reference to fig. 2 to 9. Referring to fig. 2 and 3, the mold comprises a movable mold plate 1, wherein the movable mold plate 1 is provided with a mold core 11, and the movable mold plate 1 and a fixed mold plate cover to form a mold cavity.

The mold core 11 is internally provided with a circular hole 7 and a kidney-shaped hole 8.

Referring to fig. 2 and 9, a first molding rod 21 is inserted into the circular hole 7 in a matching manner, the first molding rod 21 is welded and fixed in the circular hole 7, and the outer wall of the first molding rod 21 is provided with a notch to exhaust the mold cavity; a second forming rod 22 is inserted into the waist circular hole 8 in a matching manner, a second forming rod 33 is fixed in the waist circular hole 8 in a welding manner, and the outer wall of the second forming rod 33 is provided with a notch to exhaust gas from the die cavity;

referring to fig. 2 to 9, the first molding rod 21 includes a first vent passage 31 and a first main vent passage 32 communicating with each other, the first vent passage 31 communicates with the mold cavity, and the first main vent passage 32 communicates with the outside of the mold, so that the gas in the mold cavity can be exhausted through the first vent passage 31 and the first main vent passage 32 in sequence.

The first exhaust duct 31 is a linear exhaust duct formed along the axial direction of the first forming rod 21, the first exhaust duct 31 includes two side surfaces and a bottom surface, and the bottom surface is a curved surface, so that the gap between the bottom surface of the first exhaust duct 31 and the hole wall of the circular hole 7 is 0.075 cm; the gap size of 0.075cm is small, gas can normally circulate, and aluminum liquid cannot enter.

The first main exhaust passage 32 includes a first annular passage 321 and a first straight passage 322; the outer wall of the first forming rod 21 is provided with a circular ring to form a first annular air passage 321; the outer wall of the first forming rod 21 is provided with a tangent plane along the axis to form a first linear air passage 322; the gap between the first annular air passage 321 and the outer wall of the first forming bar 21 may be 0.2cm, and the gap between the first linear air passage 322 and the outer wall of the first forming bar 21 may be 0.2 cm.

The first annular air passage 321 is positioned between the first exhaust passage 31 and the first linear air passage 322 and plays a role of communicating the first exhaust passage 31 with the first linear air passage 322, and the first linear air passage 322 is communicated with the outside of the movable die plate 1.

There are 3 first exhaust ducts 31, and in other embodiments, the number of the first exhaust ducts 31 may be 4, 5, or 6; and the first gas discharge ducts 31 are arranged at equal intervals in the circumferential direction of the first molding bar 21. The annular arrangement of the first annular gas passages 321 also facilitates communication of all the first gas discharge passages 31.

The opening position intercommunication die cavity of circular port 7, first shaping pole 21 are equipped with first shaft shoulder 33, and first shaft shoulder 33 is located the opening position of circular port 7, and the opening position of circular port 7 and first shaft shoulder 33 all are equipped with first chamfer 34, and first chamfer 34 of circular port 7 and first shaft shoulder 33 two places is inside and outside to arrange with one heart and is formed first air guide way 51. The first air guide passage 51 communicates with the first air discharge passage 31, and has an effect of collecting the air flow.

The second forming rod 22 comprises a second exhaust passage 41, the second exhaust passage 41 is a linear groove, the second exhaust passage 41 comprises a bottom surface and two side surfaces, the bottom surface of the second exhaust passage 41 is a plane, a gap is formed between the bottom surface of the second exhaust passage 41 and the plane hole wall of the oval hole 8, and the size of the gap is 0.075 cm.

The second molding rod 22 is opened with a second main exhaust passage 42. The second main exhaust passage 42 communicates with the outside of the movable die plate 1, and the second main exhaust passage 42 and the second exhaust passage 41 communicate with each other.

The second main exhaust passage 42 includes a second annular passage 421 and a second straight passage 422; the second annular air passage 421 is arranged on the outer wall of the second forming rod 22, and the second annular air passage 421 is of a waist circular ring structure;

the outer wall of the second forming rod 22 is provided with a tangent plane along the axis to form a second linear air passage 422; the second annular air passage 421 communicates the second exhaust passage 41 and the second linear air passage 422.

The number of the second exhaust passages 41 is 2, and 2 second exhaust passages 41 are located on the side plane of the second molding rod 22. The 2 second air vent channels 41 are communicated with the second annular air channel 421, so that the air flow in the mold cavity is gathered.

The opening position of the waist circular hole 8 is located in the die cavity, the outer wall of the second forming rod 22 is provided with a second shaft shoulder 43, the second shaft shoulder 43 is located at the opening position of the waist circular hole 8, the opening position of the waist circular hole 8 and the second shaft shoulder 43 are both provided with a second chamfer 44, and the second chamfer 44 at the two positions of the waist circular hole 8 and the second shaft shoulder 43 are arranged inside and outside concentrically to form a second air guide channel 52. The second air guide passage 52 is communicated with the second air discharge passage 41 and has the function of guiding air flow, and the second air discharge passage 41 is communicated with the outer side of the movable die plate 1.

Referring to fig. 8-9, the mold core 11 is provided with a plurality of hemispherical grooves 9, the hemispherical grooves 9 are densely arranged, the hemispherical grooves 9 surround the end surfaces of the circular holes 7 and the circular waist holes 8, the hemispherical grooves 9 surround the circular holes 7 and the circular waist holes 8 in a ring shape, and the ring surrounded by the hemispherical grooves 9 has 2 rings.

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 mould of die-casting casing, includes movable mould board (1), and movable mould board (1) is equipped with mold core (11), characterized by: a circular hole (7) and a waist circular hole (8) are formed in the mold core (11), a first forming rod (21) is inserted in the circular hole (7) in a matching manner, and a second forming rod (22) is inserted in the waist circular hole (8) in a matching manner;

a first exhaust passage (31) is formed in the outer wall of the first forming rod (21), the gap between the bottom surface of the first exhaust passage (31) and the hole wall of the circular hole (7) is 0.075cm, the first exhaust passage (31) points to the mold core (11), a first main exhaust passage (32) communicated to the outside of the movable mold plate (1) is formed between the first forming rod (21) and the circular hole (7), and the first main exhaust passage (32) is communicated with the first exhaust passage (31);

a second exhaust passage (41) is arranged on the outer wall of the second molding rod (22), the gap between the bottom surface of the second exhaust passage (41) and the wall of the waist round hole (8) is 0.075cm, a second main exhaust passage (42) communicated to the outside of the movable template (1) is arranged between the second molding rod (22) and the waist round hole (8), and the second main exhaust passage (42) is communicated with the second exhaust passage (41).

2. The die-cast housing die as claimed in claim 1, wherein: first shaping pole (21) are equipped with first shaft shoulder (33), and first shaft shoulder (33) are located the open position of circular port (7), and the open position of circular port (7) and first shaft shoulder (33) all are equipped with first chamfer (34), and first chamfer (34) of circular port (7) and first shaft shoulder (33) two places are arranged with one heart inside and outside forming first air guide way (51).

3. The die-cast housing die as claimed in claim 1, wherein: the second forming rod (22) is provided with a second shaft shoulder (43), the second shaft shoulder (43) is located at the opening position of the waist circular hole (8), the opening position of the waist circular hole (8) and the second shaft shoulder (43) are both provided with second chamfers (44), and the second chamfers (44) at the two positions of the waist circular hole (8) and the second shaft shoulder (43) are arranged inside and outside concentrically to form a second air guide channel (52).

4. The die-cast housing die as claimed in claim 1, wherein: the first main exhaust passage (32) comprises a first annular air passage (321) and a first straight air passage (322);

the outer wall of the first forming rod (21) is provided with a circular ring to form a first annular air passage (321);

the outer wall of the first forming rod (21) is provided with a tangent plane along the axis to form a first linear air passage (322);

the first annular air passage (321) communicates the first exhaust passage (31) and the first linear air passage (322).

5. The die-cast housing die as claimed in claim 4, wherein: the first exhaust duct (31) is provided in plurality, and the first exhaust duct (31) is arranged at equal intervals along the circumferential direction of the first molding bar (21).

6. The die-cast housing die as claimed in claim 1, wherein: the second main exhaust passage (42) comprises a second annular air passage (421) and a second linear air passage (422);

the outer wall of the second forming rod (22) is provided with a circular ring to form a second annular air passage (421);

the outer wall of the second forming rod (22) is provided with a tangent plane along the axis to form a second linear air passage (422);

the second annular air passage (421) is communicated with the second exhaust passage (41) and the second linear air passage (422).

7. The die-cast housing die as claimed in claim 6, wherein: the number of the second exhaust passages (41) is 2, and 2 second exhaust passages (41) are located on the side plane of the second forming rod (22).

8. The die-cast housing die as claimed in claim 1, wherein: the mold core (11) is provided with a plurality of hemispherical grooves (9), and the hemispherical grooves (9) are arranged annularly around the end surfaces of the circular hole (7) and the waist circular hole (8).

9. The die-cast housing die as claimed in claim 2, wherein: the ring enclosed by the semi-spherical groove (9) has 2 circles.