CN219402273U - Die casting die ejection mechanism and casting die - Google Patents

Abstract

The utility model belongs to the technical field of demolding, and discloses a die casting mold ejection mechanism and a casting mold, wherein the die casting mold ejection mechanism comprises: the first thimble backboard is penetrated with a plane thimble and a deep cavity thimble, and the plane thimble can move relative to the first thimble backboard; the second thimble backboard is connected with the first thimble backboard, one surface facing the first thimble backboard is provided with a mounting through groove, and an inward extending abutting part is arranged in the mounting through groove; the delay ejection piece is positioned in the mounting through groove, one end of the delay ejection piece, facing the plane ejector pin, is provided with a delay part, and the delay part protrudes along the circumferential direction of the delay ejection piece and can be abutted with the abutting part; the elastic piece is positioned between the delay piece and the abutting part and abuts the delay piece against the abutting part to approach the deep cavity thimble. By arranging the delay ejection piece on the second ejector pin backboard, the deep cavity ejector pin and the plane ejector pin can eject all parts of the product simultaneously by utilizing the elastic potential energy of the elastic piece, so that the plane deformation of the product caused by the fact that the plane ejector pin is ejected out a certain distance in advance is avoided.

Description

Die casting die ejection mechanism and casting die

Technical Field

The utility model relates to the technical field of demolding, in particular to a die casting mold ejection structure and a casting mold.

Background

The die casting die is a tool for casting metal parts, and is mainly applied to a special die casting die forging machine to complete a corresponding die casting process, wherein the basic process of die casting is as follows: the molten metal is cast and filled into the cavity of the mold at low or high speed, the mold has movable cavity surface, and the molten metal is pressurized and forged along with the cooling process of the molten metal, so that the shrinkage cavity and shrinkage porosity defect of the blank are eliminated, and the internal structure of the blank reaches the forged broken grains. The comprehensive mechanical properties of the blank are obviously improved. After die casting is finished, the product needs to be demolded, a certain ejection mechanism is generally adopted in the prior art to eject the product from the die, the ejection mechanism is generally composed of a plurality of ejector pins and can cover a plurality of areas of the product as much as possible, so that all parts of the product can be ejected out of the die simultaneously, and the phenomenon that a single area is separated from the die in advance during ejection is avoided, and deformation occurs.

As shown in fig. 1, the product is produced by a die casting die, the structure is relatively complex, the wall thickness is uneven, and the local die cavity of the product is deeper. After the product casting is finished, when demoulding, the product is large in wall thickness difference and has a deeper die cavity, if a plurality of ejector rods are adopted to eject simultaneously, the ejector rods positioned at the deep cavity positions are difficult to ensure that the rest ejector rods eject simultaneously due to certain resistance, namely, the rest ejector rods eject in a lagging way, the plane part of the product is deformed to a certain extent due to the fact that the plane part of the product is stressed in advance relative to the deep cavity part, the product is damaged finally, and the yield of the product is lower.

Disclosure of Invention

The utility model aims to provide a die-casting die ejection structure which can enable a plane ejector pin and a deep cavity ejector pin to eject all parts of a product simultaneously.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an ejection mechanism of a die casting die, which comprises:

the first thimble backboard is provided with a plane thimble and a deep cavity thimble in a penetrating way, and at least one plane thimble in the plane thimble and the deep cavity thimble can move relative to the first thimble backboard;

the second thimble backboard is connected with the first thimble backboard, one surface of the second thimble backboard facing the first thimble backboard is provided with a mounting through groove, the mounting through groove corresponds to the position of the plane thimble, an inward extending abutting part is arranged in the mounting through groove, and the abutting part is positioned at one end of the mounting through groove far away from the first thimble backboard;

the delay ejection piece is positioned in the mounting through groove, the delay ejection piece can move relative to the mounting through groove, one end of the delay ejection piece, facing the plane thimble, is provided with a delay part, and the delay part protrudes along the circumferential direction of the delay ejection piece and can be abutted with the abutting part;

the elastic piece is positioned between the time delay ejection piece and the propping part and proppes the time delay ejection piece away from the propping part to approach the deep cavity thimble.

Preferably, the mounting through groove has a first projection on a plane where the second thimble backboard contacts with the first thimble backboard, the delay ejection piece has a second projection on a plane where the second thimble backboard contacts with the first thimble backboard, a size of the first projection is larger than a size of the second projection, and the first projection covers the second projection.

Preferably, the abutment portion extends inward along a peripheral side of the mounting through groove to form a guide groove.

Preferably, the sum of the free length of the elastic piece and the length of the delay part is a first length, the distance from the abutting part to the opening of the mounting through groove, which faces the first thimble backboard, is a second length, and the first length is smaller than the second length.

Preferably, a deep cavity limiting groove is formed in one face of the first ejector pin backboard, which faces the second ejector pin backboard, a deep cavity limiting part protruding in the circumferential direction is formed in one end of the second ejector pin backboard, which faces the second ejector pin backboard, and the deep cavity limiting part is located in the deep cavity limiting groove.

Preferably, a plane limiting groove is formed in one face, facing the second thimble backboard, of the first thimble backboard, a plane limiting portion protruding along the circumferential direction is formed in one end, facing the second thimble backboard, of the plane thimble backboard, and the plane limiting portion is located in the plane limiting groove.

Preferably, the first thimble backboard and the second thimble backboard are detachably connected.

Preferably, the first thimble backboard and the second thimble backboard are provided with a plurality of matching grooves corresponding to each other.

Preferably, the elastic member is a spring.

The utility model also provides a casting die, which comprises the die casting die ejection mechanism.

The utility model has the beneficial effects that:

according to the ejection mechanism of the die casting die, the delay ejection piece is arranged on the second ejector pin backboard, and the deep cavity ejector pin and the plane ejector pin can eject all parts of a product simultaneously by utilizing the elastic potential energy of the elastic piece, so that the plane deformation of the product caused by the fact that the plane ejector pin is ejected out a certain distance in advance is avoided, and the yield of the product is improved.

Drawings

FIG. 1 is a schematic diagram of a product in the background art;

FIG. 2 is a schematic view of the ejector mechanism of the die casting mold of the present utility model;

FIG. 3 is a schematic view of a portion of the ejection mechanism of the die casting mold shown in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the ejection mechanism of the die casting mold shown in FIG. 2;

FIG. 5 is an enlarged view of a portion of the ejection mechanism of the die casting mold shown in FIG. 4;

fig. 6 is a schematic view, partially in section, of the ejection mechanism of the die casting mold shown in fig. 2.

In the figure:

1. a first ejector pin backplate; 2. a second thimble backboard; 3. a time delay ejection member; 4. an elastic member; 5. a plane thimble; 6. deep cavity thimble; 7. installing a through groove; 701. a first through groove; 702. a second through slot; 8. a stopping portion; 9. a delay section; 10. a deep cavity limit groove; 11. a deep cavity limit part; 12. a planar limit groove; 13. a plane limiting part; 14. and a mating groove.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

Referring to fig. 2-6, an ejection mechanism of a die casting mold is disclosed in the present embodiment, comprising: the device comprises a first thimble backboard 1, a second thimble backboard 2, a delay ejection piece 3 and an elastic piece 4, wherein a plane thimble 5 and a deep cavity thimble 6 are arranged on the first thimble backboard 1 in a penetrating way, and at least the plane thimble 5 in the plane thimble 5 and the deep cavity thimble 6 can move relative to the first thimble backboard 1; it should be understood that the number and positions of the plane ejector pins 5 and the deep cavity ejector pins 6 are adapted to the shape of the product to be demolded, and in this embodiment, only the product with a large wall thickness difference and a deep mold cavity is described. It can be known that the first thimble backplate 1 is provided with a plurality of holes or grooves for the plane thimble 5 and the deep cavity thimble 6 to penetrate, wherein the plane thimble 5 is necessarily a hole or a through groove, so that the plane thimble 5 can move relative to the first thimble backplate 1, and it should be noted that the movable finger can move at least along two directions relative to the first thimble backplate 1.

The second thimble backboard 2 is connected with the first thimble backboard 1, one surface facing the first thimble backboard 1 is provided with a mounting through groove 7, the mounting through groove 7 corresponds to the position of the plane thimble 5, an inward extending abutting part 8 is arranged in the mounting through groove 7, and the abutting part 8 is positioned at one end of the mounting through groove 7 far away from the first thimble backboard 1; it is to be understood that the cross section of the mounting through groove 7 in the present embodiment is generally approximately T-shaped, and for the purpose of description, a portion of the mounting through groove 7 having the abutment portion 8 is defined as a first through groove 701 and the remaining portion of the mounting through groove 7 is defined as a second through groove 702 in the present embodiment.

The delay ejection piece 3 is positioned in the mounting through groove 7, the delay ejection piece 3 can move relative to the mounting through groove 7, one end of the delay ejection piece 3, which faces the plane thimble 5, is provided with a delay part 9, and the delay part 9 protrudes along the circumferential direction of the delay ejection piece 3 and can be abutted with the abutting part 8; it will be appreciated that the delay part 9 is only movable in the second through slot 702, and the remainder of the delay ejection 3 is movable in both the first through slot 701 and the second through slot 702. The time delay ejection 3 can move along the direction away from the first thimble backplate 1 until the time delay part 9 is abutted with the abutting part 8, and the time delay ejection 3 can move along the direction close to the first thimble backplate 1 and can completely move out of the mounting through groove 7.

The elastic piece 4 is positioned between the delay ejection piece 3 and the abutting part 8, and the delay ejection piece 3 is abutted against the abutting part 8 to approach the deep cavity thimble 6; it can be understood that when the ejection is performed, the plane ejector pin 5 moves relative to the first ejector pin backplate 1 and enters the mounting through groove 7 on the second ejector pin backplate 2, abuts against the delay part 9, and drives the delay ejection member 3 to move synchronously, at this time, the elastic member 4 compresses, that is, part of ejection force is used for compressing the elastic member 4, so that the force of the plane ejector pin 5 relative to the deep cavity ejector pin 6 is reduced, a certain delay effect is achieved, and the deep cavity ejector pin 6 can eject a product simultaneously with the plane ejector pin 5. More specifically, the elastic member 4 is a spring.

In the die casting die ejection mechanism in the embodiment, the delay ejection piece 3 is arranged on the second ejector pin backboard 2, and the deep cavity ejector pin 6 and the plane ejector pin 5 can eject all parts of a product simultaneously by utilizing the elastic potential energy of the elastic piece 4, so that the plane deformation of the product caused by the fact that the plane ejector pin 5 is ejected a certain distance in advance is avoided, and the yield of the product is improved.

Specifically, the mounting through groove 7 has a first projection on a plane where the second thimble backboard 2 contacts with the first thimble backboard 1, the time delay ejection piece 3 has a second projection on a plane where the second thimble backboard 2 contacts with the first thimble backboard 1, the size of the first projection is larger than that of the second projection, and the first projection covers the second projection; it should be noted that, since the delay ejection member 3 needs to perform a degree of movement in the mounting through slot 7, if the first projection is smaller than the second projection, the movement requirement cannot be satisfied, and if the first projection is equal to the second projection, the delay portion 9 may still have a certain friction force, which affects the ejector pin action of the plane ejector pin 5.

Specifically, referring to fig. 4, the stopper portion 8 extends inward along the circumferential side of the mounting through groove 7 to form a guide groove (in this embodiment, representing the above-described first through groove 701). It will be appreciated that the guide slot is generally the same shape as the delay ejection 3, more specifically generally the cross-sectional shape, and that the guide slot is generally sized slightly larger than the delay ejection 3 so that the trajectory of movement of the delay ejection 3 is relatively determined so as to make the direction of movement of the planar ejector pin 5 the same as the compression direction of the spring as much as possible, ensuring the delay action.

Specifically, referring to fig. 5, the sum of the free length of the elastic member 4 and the length of the delay portion 9 is a first length, and the distance from the stop portion 8 to the opening of the mounting through groove 7 facing the first thimble backplate 1 is a second length, where the first length is smaller than the second length. It can be understood that when the first length is smaller than the second length, in the initial state, the delay ejection member 3 is completely located in the installation through groove 7, and a certain distance exists between the delay ejection member and the plane ejection pin 5, namely, a delay distance, and when the ejection is performed, the plane ejection pin 5 needs to move in advance by the delay distance and then abut against the delay part 9, so that the deep cavity ejection pin 6 can move in advance by the delay distance, and the delay distance can be set according to the specific size of the deep cavity of the product, so that the plane ejection pin 5 and the deep cavity ejection pin 6 can eject the product at the same time, and the yield of the product is further improved.

Specifically, referring to fig. 6, a deep cavity limiting groove 10 is formed in a surface of the first ejector pin backboard 1 facing the second ejector pin backboard 2, a deep cavity limiting portion 11 protruding in the circumferential direction is formed in one end of the deep cavity ejector pin 6 facing the second ejector pin backboard 2, and the deep cavity limiting portion 11 is located in the deep cavity limiting groove 10. It can be appreciated that, through the cooperation of the deep cavity limiting groove 10 and the deep cavity limiting portion 11, the deep cavity thimble 6 can not be separated from the first thimble backboard 1 from the direction away from the second thimble backboard 2, and the deep cavity thimble 6 and the first thimble backboard 1 are connected in a detachable manner, so as to facilitate subsequent assembly and adjustment. Similar to the deep cavity thimble 6, a plane limiting groove 12 is formed in one surface of the first thimble backboard 1 facing the second thimble backboard 2, a plane limiting portion 13 protruding along the circumferential direction is formed in one end of the deep cavity thimble 6 facing the second thimble backboard 2, and the plane limiting portion 13 is located in the plane limiting groove 12. Through the cooperation of the plane limiting groove 12 and the plane limiting part 13, the plane thimble 5 can not be separated from the first thimble backboard 1 from the direction away from the second thimble backboard 2.

Specifically, the first thimble backboard 1 and the second thimble backboard 2 are detachably connected. It should be understood that the above connection means include, but are not limited to, snap-fit, screw-fit, and the like. The first thimble backboard 1 and the second thimble backboard 2 can be fixed by only being satisfied and can be separated from each other through a certain process. By the aid of the connecting mode, the delay ejection piece 3, the deep cavity ejector pins 6 and the plane ejector pins 5 are easy to install.

Specifically, the first thimble backboard 1 and the second thimble backboard 2 are provided with a plurality of matching grooves 14 corresponding to each other. It will be appreciated that the above-mentioned engaging groove 14 can enable the ejector mechanism of the die-casting mold of the present embodiment to be used with other devices, for example, to be used for self-clamping, guiding the other components, or assembling the other components, which is not described in detail herein.

Example two

The embodiment also discloses a casting mold, which comprises the die casting mold ejection mechanism in the first embodiment.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. An ejector mechanism for a die casting die, comprising:

the novel ejector comprises a first ejector pin backboard (1), wherein a plane ejector pin (5) and a deep cavity ejector pin (6) are arranged on the first ejector pin backboard (1) in a penetrating manner, and at least the plane ejector pin (5) in the plane ejector pin (5) and the deep cavity ejector pin (6) can move relative to the first ejector pin backboard (1);

the second thimble backboard (2), the second thimble backboard (2) is connected with the first thimble backboard (1), one surface facing the first thimble backboard (1) is provided with a mounting through groove (7), the mounting through groove (7) corresponds to the position of the plane thimble (5), an inward extending abutting part (8) is arranged in the mounting through groove (7), and the abutting part (8) is positioned at one end of the mounting through groove (7) far away from the first thimble backboard (1);

the time delay ejection piece (3), the time delay ejection piece (3) is located in the installation through groove (7), the time delay ejection piece (3) can move relative to the installation through groove (7), one end of the time delay ejection piece (3) facing the plane thimble (5) is provided with a time delay part (9), and the time delay part (9) protrudes along the circumferential direction of the time delay ejection piece (3) and can be abutted with the abutting part (8);

the elastic piece (4), the elastic piece (4) is located between the time delay ejection piece (3) and the abutting portion (8), and the time delay ejection piece (3) is abutted to the abutting portion (8) so as to be close to the deep cavity thimble (6).

2. The die casting mold ejection mechanism according to claim 1, wherein the mounting through groove (7) has a first projection on a plane where the second ejector pin backplate (2) contacts the first ejector pin backplate (1), the time-lapse ejector (3) has a second projection on a plane where the second ejector pin backplate (2) contacts the first ejector pin backplate (1), a size of the first projection is larger than a size of the second projection, and the first projection covers the second projection.

3. The die casting die ejector mechanism according to claim 1, wherein the abutment portion (8) extends inward along a peripheral side of the mounting through groove (7) to form a guide groove.

4. The die casting die ejection mechanism according to claim 1, wherein the sum of the free length of the elastic member (4) and the length of the delay part (9) is a first length, the distance from the abutting part (8) to the opening of the mounting through groove (7) toward the first ejector pin back plate (1) is a second length, and the first length is smaller than the second length.

5. The die casting die ejection mechanism according to claim 1, wherein a deep cavity limiting groove (10) is formed in one surface of the first ejector pin backboard (1) facing the second ejector pin backboard (2), a deep cavity limiting portion (11) protruding in the circumferential direction is formed in one end of the deep cavity ejector pin (6) facing the second ejector pin backboard (2), and the deep cavity limiting portion (11) is located in the deep cavity limiting groove (10).

6. The die casting die ejection mechanism according to claim 1, wherein a plane limiting groove (12) is formed in one surface of the first ejector pin backboard (1) facing the second ejector pin backboard (2), a plane limiting portion (13) protruding along the circumferential direction is formed in one end of the plane ejector pin (5) facing the second ejector pin backboard (2), and the plane limiting portion (13) is located in the plane limiting groove (12).

7. The die casting mold ejection mechanism according to claim 1, wherein the first ejector pin back plate (1) and the second ejector pin back plate (2) are detachably connected.

8. The die casting mold ejection mechanism according to claim 1, wherein a plurality of matching grooves (14) corresponding to positions are formed in the first ejector pin back plate (1) and the second ejector pin back plate (2).

9. The injection mold ejection mechanism according to claim 1, characterized in that the elastic member (4) is a spring.

10. Casting mould, characterized in that it comprises a die casting mould ejection mechanism according to any one of claims 1 to 9.