CN217223557U

CN217223557U - Gravity casting ejection mechanism and mold

Info

Publication number: CN217223557U
Application number: CN202220151102.3U
Authority: CN
Inventors: 郭玉海
Original assignee: Dongguan Aluminum Dewang Hardware Products Co Ltd
Current assignee: Dongguan Aluminum Dewang Hardware Products Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-08-19
Anticipated expiration: 2032-01-19

Abstract

The utility model is suitable for a gravity casting technical field provides a gravity casting ejection mechanism and mould, this ejection mechanism, include: a top plate; the ejector pin fixing structure comprises an ejector pin and a plurality of ejector pins fixedly assembled with the ejector plate, wherein the ejector pin is provided with a plurality of ejector pin mounting grooves, the ejector pins are embedded in the ejector pin mounting grooves, and a first expansion gap for the ejector pins to expand when heated is arranged between the ejector pins and the ejector pin mounting grooves; the free end of the ejector pin is fixedly assembled with the upper die and the lower die and is in contact with the finished casting product so as to eject the finished casting product out of the die. Through set up first expansion gap between thimble and thimble mounting groove in this application, this expansion gap accessible mould and ejection mechanism temperature difference's expansion coefficient calculate, can effectively solve mould and thimble friction or card dead phenomenon, and production is smooth and easy, improves the productivity.

Description

Gravity casting ejection mechanism and mold

Technical Field

The utility model belongs to the technical field of gravity casting, especially, relate to a gravity casting ejection mechanism and mould.

Background

The gravity casting refers to a process of casting a molten metal into a die cavity of a die under the action of gravity to form a casting through cooling forming, in the existing casting die, because the die is always in a high-temperature state in the casting process of an aluminum alloy product, the temperature of an ejector plate only comes from the transmission of an ejector pin and is not directly contacted with molten aluminum, and according to the steel characteristics of the die, the die is heated to cause expansion, and because the die and the ejector plate have temperature difference, the different temperature differences cause different expansion coefficients of the ejector pin between the die and the ejector plate, so that the die and the ejector plate are different in extension size, and the phenomenon of friction or blocking of the ejector pin and the die is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gravity casting ejection mechanism and mould aims at solving among the prior art problem dead of friction or card appears easily between thimble and the mould.

The utility model discloses a realize like this, a gravity casting ejection mechanism, include:

a top plate; and

the ejector pins are fixedly assembled with the top plate, a plurality of ejector pin mounting grooves are formed in the top plate, the ejector pins are embedded in the ejector pin mounting grooves, and a first expansion gap for the ejector pins to expand when heated is formed between the ejector pins and the ejector pin mounting grooves;

the free end of the ejector pin is fixedly assembled with the upper die and the lower die and is in contact with the finished casting product so as to eject the finished casting product out of the die.

In one embodiment, the ejection mechanism comprises:

an upper die ejection mechanism fixedly assembled with the upper die to separate the casting finished product from the upper die;

and the lower die ejection mechanism is fixedly assembled with the lower die so as to eject the casting finished product out of the die.

In one embodiment, the upper mold ejection mechanism includes:

an upper top plate;

and the free end of the upper thimble penetrates through the upper die and is in contact with the casting finished product so as to separate the casting finished product from the upper die.

In one embodiment, the upper mold ejection mechanism includes:

a plurality of sets up in go up the roof and keep away from one side of lower mould, order about through self elastic deformation go up the roof and drive go up the thimble to the movement of foundry goods finished product, with the foundry goods finished product with the elastomeric element that goes up the mould and break away from.

In one embodiment, the lower mold ejection mechanism includes:

a lower top plate; and

and the free end of the lower thimble penetrates through the lower die and is in contact with the casting finished product so as to eject the casting finished product out of the die.

In one embodiment, the lower mold ejection mechanism includes:

and the power output end of the driving mechanism is fixedly assembled with the top plate so as to reciprocate under the driving of the driving mechanism, so that the casting finished product is ejected out of the die.

The embodiment of the utility model provides a still provide a gravity casting mould, include:

the upper die and the lower die are assembled to form a molding die cavity; and

the gravity casting ejection mechanism as described above;

the upper die and one side of the lower die, which is close to the ejector pin, are provided with through grooves, the free ends of the ejector pins penetrate through the through grooves and are in contact with the casting product under the driving of external force, so that the product is ejected out of the die.

In an embodiment, a second expansion gap is provided between the through groove and the thimble.

In one embodiment, the mold comprises

The upper die ejection mechanism is arranged between the upper die and the upper die leg.

In one embodiment, the mold comprises:

and the lower die ejection mechanism is arranged between the lower die and the lower die leg.

The embodiment of the utility model provides an in, provide a gravity casting ejection mechanism, include: a top plate; the ejector pin is embedded in the ejector pin mounting groove, and a first expansion gap for the ejector pin to expand when heated is arranged between the ejector pin and the ejector pin mounting groove; the free end of the ejector pin is fixedly assembled with the upper die and the lower die and is in contact with the finished casting product so as to eject the finished casting product out of the die. Through set up first expansion gap between thimble and thimble mounting groove in this application, this expansion gap accessible mould and ejection mechanism temperature difference's expansion coefficient calculate, can effectively solve mould and thimble friction or card dead phenomenon, and production is smooth and easy, improves the productivity.

Drawings

Fig. 1 is a schematic view of an overall structure of a gravity casting mold according to an embodiment of the present invention;

fig. 2 is an exploded view of a gravity casting mold according to an embodiment of the present invention;

fig. 3 is a schematic partial structural view of an ejector plate according to an embodiment of the present invention;

fig. 4 is an enlarged schematic view of a thimble mounting groove a provided in the embodiment of the present invention;

fig. 5 is a schematic view of an overall structure of a gravity casting mold according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an upper die according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a lower die according to an embodiment of the present invention;

wherein, 1, a top plate; 2. a thimble; 3. obtaining a finished casting product; 4. an upper die; 5. an upper die ejection mechanism; 6. a lower die; 7. a lower die ejection mechanism; 8. mounting a mold leg; 9. a lower mold leg; 11. a thimble mounting groove; 12. a first expansion gap; 51. an upper top plate; 52. an upper thimble; 53. an elastic member; 7. a lower die ejection mechanism; 71. a lower top plate; 72. a lower thimble; 10. a through groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, in an embodiment of the present invention, there is provided a gravity casting ejection mechanism, including: a top plate 1; the ejector pin 2 is fixedly assembled with the ejector pin 1, a plurality of ejector pin mounting grooves 11 are formed in the ejector pin 1, the ejector pin 2 is embedded in the ejector pin mounting grooves 11, and a first expansion gap 12 for the ejector pin 2 to expand when heated is formed between the ejector pin 2 and the ejector pin mounting grooves 11; the free end of the ejector pin 2 is fixedly assembled with the upper die 4 and the lower die 6 and is in contact with the casting finished product 3, so that the casting finished product 3 is ejected out of the die. Through set up first expansion gap between thimble and thimble mounting groove in this application, this expansion gap accessible mould and ejection mechanism temperature difference's expansion coefficient calculate, can effectively solve mould and thimble friction or card dead phenomenon, and production is smooth and easy, improves the productivity.

Referring to FIG. 4, there is shown an enlarged view of the ejector pin mounting groove A in the ejector plate, which is provided with the first expansion gap 12. The expansion coefficient of the temperature difference between the mold and the ejection mechanism can be obtained through calculation and experiments for the first expansion gap 12, and the extension ratio of the mold and the ejection mechanism can be determined according to the expansion coefficient, so that the expansion size of the first expansion gap 12 can be determined.

Referring to fig. 1-7, in an embodiment of the present invention, the ejection mechanism includes: an upper die ejection mechanism 5 fixedly assembled with the upper die 4 to separate the casting finished product 3 from the upper die 4; and the lower die ejection mechanism 7 is fixedly assembled with the lower die 6 so as to eject the casting finished product 3 out of the die. When the mold is opened, the finished casting product 3 is pushed out to one side far away from the upper mold 4 through the upper mold ejection mechanism 5, so that the upper mold 4 is separated from the finished casting product 3, and the finished casting product 3 is pushed out to one side far away from the lower mold 6 through the lower mold ejection mechanism 7, so that the finished casting product 3 is pushed out of the mold.

Referring to fig. 1 to 7, in an embodiment of the present invention, the upper mold ejection mechanism 5 includes: an upper top plate 51; and an upper thimble 52 fixedly assembled on the upper top plate 51, wherein a free end of the upper thimble 52 passes through the upper die 4 and contacts the finished casting 3 to separate the finished casting 3 from the upper die 4.

Further, the upper mold ejection mechanism 5 further includes: and the elastic parts 53 are arranged on one side of the upper top plate 51 far away from the lower die 4, drive the upper top plate 51 to drive the upper ejector pins 52 to move towards the casting finished product 3 through elastic deformation of the elastic parts, and separate the casting finished product 3 from the upper die 4. When the die is closed, the elastic part 53 is in a compressed state, and when the die is opened after the casting is formed, the elastic part 52 applies a force to the top plate 51 in the direction of the finished casting product 3, and at this time, the top plate 51 drives the ejector pin 52 to move towards the finished casting product 3 so as to push the finished casting product 3 to be separated from the upper die 4.

The elastic member 53 may be a spring, a leaf spring, or other elastic members.

Referring to fig. 1-7, in an embodiment of the present invention, the elastic component 53 is a spring, the upper mold 4 is provided with a plurality of spring mounting members, the spring can be sleeved on the spring mounting members, one end of the spring mounting member, which is far away from the spring, extends to one side of the upper mold 4 and is fixedly assembled with the upper mold, and the spring mounting member can be used as a thimble.

Referring to fig. 1 to 7, in an embodiment of the present invention, the lower mold ejection mechanism 7 includes: a lower top plate 71; and a lower thimble 72 fixedly assembled on the lower top plate, wherein a free end of the lower thimble 72 passes through the lower die 6 and contacts with the casting product 3 so as to eject the casting product 3 out of the die. When the mould is opened, after the finished casting 3 is separated from the upper mould 4, the lower mould ejection mechanism 7 can move in the reverse direction of the position of the finished casting 3 until the ejector pin ejects the finished casting 3 out of the mould.

Referring to fig. 1-7, in an embodiment of the present invention, the lower mold ejection mechanism 7 includes: and a driving mechanism (not shown in the figure), wherein a power output end of the driving mechanism is fixedly assembled with the lower top plate 71 to reciprocate under the driving of the driving mechanism, so that the casting finished product 3 is ejected out of the mold.

Wherein, the driving mechanism can be a cylinder, an oil cylinder and other power mechanisms.

Referring to fig. 1-7, an embodiment of the present invention further provides a gravity casting mold, including: the mould comprises an upper mould 4 and a lower mould 6 fixedly assembled with the upper mould 4, wherein the upper mould 4 and the lower mould 6 are matched to form a forming mould cavity; and the gravity casting ejection mechanism as described above; go up the mould 4 and the lower mould 6 is close to one side of thimble 2 is provided with logical groove 61, the free end of thimble 2 wears to locate in logical groove 61 to under the driving of external force with casting finished product 4 contacts, with casting finished product 4 ejecting mould. Through set up first inflation clearance between thimble and thimble mounting groove in this application, can effectively solve mould and thimble friction or card dead phenomenon, it is smooth and easy to improve mould casting production, improves the productivity.

The embodiment of the utility model provides an in, set up second expansion clearance (not shown in the figure) between the free end that leads to groove 61 and thimble 2, because this second expansion clearance is too big, can lead to the casting liquid to flow into ejection mechanism, therefore this second expansion clearance should not be too big, specifically can set up according to actual conditions.

Referring to fig. 1-7, in an embodiment of the present invention, the mold includes an upper mold leg 8 fixedly assembled with the upper mold 4, and the upper mold ejection mechanism 5 is disposed between the upper mold 4 and the upper mold leg 8.

Referring to fig. 1-7, in an embodiment of the present invention, the mold includes: and the lower die ejection mechanism 7 is arranged between the lower die 6 and the lower die leg 9.

The embodiment of the utility model provides an in, through set up first expansion gap between thimble and thimble mounting groove, this expansion gap accessible mould and ejection mechanism temperature difference's expansion coefficient calculate, can effectively solve mould and thimble friction or card dead phenomenon, and production is smooth and easy, improves the productivity.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A gravity casting ejection mechanism, comprising:

a top plate (1); and

the ejector pin expansion mechanism comprises a plurality of ejector pins (2) fixedly assembled with a top plate (1), wherein a plurality of ejector pin (2) mounting grooves are formed in the top plate (1), the ejector pins (2) are embedded in the ejector pin (2) mounting grooves, and a first expansion gap (12) for the ejector pins (2) to expand when heated is formed between the ejector pins (2) and the ejector pin (2) mounting grooves;

the free end of the ejector pin (2) is fixedly assembled with the upper die (4) and the lower die (6) and is in contact with the casting finished product (3) so as to eject the casting finished product (3) out of the die.

2. The gravity casting ejection mechanism of claim 1, wherein the ejection mechanism comprises:

the upper die ejection mechanism (5) is fixedly assembled with the upper die (4) so as to separate the casting finished product (3) from the upper die (4);

and the lower die ejection mechanism (7) is fixedly assembled with the lower die (6) so as to eject the casting finished product (3) out of the die.

3. The gravity casting ejection mechanism according to claim 2, wherein the upper die ejection mechanism (5) comprises:

an upper top plate (51);

and the upper ejector pin (52) is fixedly assembled on the upper ejector plate (51), and the free end of the upper ejector pin (52) penetrates through the upper die (4) and is in contact with the finished casting (3) so as to separate the finished casting (3) from the upper die (4).

4. A gravity casting ejection mechanism according to claim 3, wherein the upper die ejection mechanism (5) comprises:

and the elastic parts (53) are arranged on one side, far away from the lower die (6), of the upper top plate (51), drive the upper ejector pins (52) to move towards the finished casting (3) through elastic deformation of the upper top plate (51), and enable the finished casting (3) to be separated from the upper die (4).

5. The gravity casting ejection mechanism according to claim 2, wherein the lower mold (6) ejection mechanism comprises:

a lower ceiling plate (71); and

and the lower ejector pin (72) is fixedly assembled on the lower top plate (71), and the free end of the lower ejector pin (72) penetrates through the lower die (6) and is in contact with the finished casting product (3) so as to eject the finished casting product (3) out of the die.

6. The gravity casting ejection mechanism according to claim 5, wherein the lower mold (6) ejection mechanism comprises:

and the power output end of the driving mechanism is fixedly assembled with the top plate (1) so as to reciprocate under the driving of the driving mechanism, so that the casting finished product (3) is ejected out of the die.

7. A gravity casting mold, the mold comprising:

the mould comprises an upper mould (4) and a lower mould (6) fixedly assembled with the upper mould (4), wherein the upper mould (4) and the lower mould (6) are matched to form a forming mould cavity; and

the gravity casting ejection mechanism according to any one of claims 1-6, comprising an upper die ejection mechanism (5) and a lower die ejection mechanism (7);

go up mould (4) and lower mould (6) are close to one side of thimble (2) is provided with logical groove (10), the free end of thimble (2) is worn to locate in logical groove (10) to under the driving of external force with casting finished product (3) contact, with will casting finished product (3) ejecting mould.

8. The gravity casting mould according to claim 7, wherein a second expansion gap is provided between the through slot (10) and the thimble (2).

9. The gravity casting mold of claim 7, wherein the mold comprises

And the upper mold leg (8) is fixedly assembled with the upper mold (4), and the upper mold ejection mechanism (5) is arranged between the upper mold (4) and the upper mold leg (8).

10. The gravity casting mold of claim 7, wherein the mold comprises:

and the lower die ejection mechanism (7) is arranged between the lower die (6) and the lower die feet (9).