CN215544808U

CN215544808U - Die-casting die

Info

Publication number: CN215544808U
Application number: CN202120800124.3U
Authority: CN
Inventors: 凌天海; 何正午; 罗家林
Original assignee: Dongguan Everwin Precision Technology Co Ltd
Current assignee: Dongguan Everwin Precision Technology Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-01-18
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to a die-casting die, which comprises a front die core and a rear die core which are arranged in a stacked mode, wherein the front die core is in a disc shape, two die cavities are arranged in the front die core, the two die cavities are symmetrically arranged in the front die core, the side wall of each die cavity is provided with a plurality of water gaps, each water gap is positioned at the junction of the front die core and the rear die core and protrudes out of the front die core, a plurality of thimble cavities are arranged in the rear die core, each thimble cavity is internally provided with a thimble, the position of each thimble corresponds to one water gap, the thimble is arranged in the rear die core and can move up and down, one end of each water gap, which is far away from the front die core, is an open surface, the surface of each thimble, which is in contact with the corresponding water gap, is a plane, and is positioned in the open surface of the corresponding water gap, and a circle of arc-shaped bulges are arranged on the side surfaces of the water gaps. The die-casting die solves the problem that a product can be stuck to the water opening of the front die core during die stripping in the prior art, so that the production efficiency is improved.

Description

Die-casting die

Technical Field

The utility model relates to the technical field of die-casting molds, in particular to a die-casting mold.

Background

The die casting die is a tool for casting metal parts, and a tool for completing a die casting process on a special die casting die forging machine.

The mold generally comprises a front mold core and a rear mold core which are arranged up and down, wherein a mold cavity is formed in the front mold core, a product is formed in the mold cavity, an ejector pin is arranged in the rear mold core, the front mold core and the rear mold core are separated through the ejector pin at the rear mold core during demolding, and then the product is taken out from the mold cavity of the front mold core. The mouth of a river is connected to the die cavity lateral wall of front mould benevolence, and the mouth of a river is used for pouring into thick liquids into, the mouth of a river is located the juncture of front mould benevolence and back mould benevolence, and in prior art, the product is followed when the die cavity of front mould benevolence is taken out, can usually glue the mouth of a river department of front mould benevolence, and the product drawing of patterns is inconvenient, will beat with the instrument and make product and mouth of a river department break away from, brings inconvenience in the given production process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a die-casting die, which aims to solve the problem that a product in the existing die-casting die can be stuck to a water gap of a front die core during die stripping.

In order to solve the technical problem, the utility model provides a die-casting die, which comprises a front die core and a rear die core which are arranged in a stacked manner, wherein the front die core is in a disc shape, two die cavities are arranged in the front die core, the two die cavities are symmetrically arranged in the front die core, the side wall of each die cavity is provided with a plurality of water gaps, each water gap is positioned at the junction of the front die core and the rear die core and protrudes out of the front die core, a plurality of thimble cavities are arranged in the rear die core, each thimble cavity is internally provided with a thimble, the position of each thimble corresponds to one water gap, the thimble is arranged in the rear die core and can move up and down, the shape of each water gap is a flat column, the thimble is a strip column, one end of each water gap, far away from the front die core, is an open surface, the surface of the thimble, which is in contact with the water gap, is a top surface of the thimble, and the top surface of the thimble is a plane and is positioned in the open surface of the water gap, and a circle of arc-shaped protrusion is arranged on the side surface of the water gap.

Preferably, the diameter of the open face of the water gap is 1.1-1.5mm larger than that of the top face of the thimble.

Preferably, the diameter of the top surface is between 7.5-8.5mm, and the diameter of the nozzle at the open surface is between 8.8-9.8 mm.

Preferably, the height of the nozzle is between 3.5mm and 4.5mm, and the distance between the arc-shaped protrusion and the open face is between 1mm and 1.25 mm.

Preferably, the length of the arc-shaped protrusion along the height direction of the water gap is between 1mm and 1.25 mm.

Preferably, the height of the arc-shaped protrusion relative to the nozzle sidewall protrusion is between 0.13 and 0.19 mm.

Preferably, the distance between the arc-shaped protrusion and the opening face is between 0.5mm and 1.5 mm.

Preferably, the length of the arc-shaped protrusion along the height direction of the water gap is between 0.5mm and 1.5 mm.

Preferably, the height of the arc-shaped protrusion relative to the nozzle side wall protrusion is between 0.1 and 0.2 mm.

Preferably, the side surface of the water gap is inclined, the open surface of the water gap is smaller than the surface of the water gap far away from the thimble, and the inclined angle of the side surface of the water gap is between 5 degrees and 20 degrees.

Compared with the prior art, the die-casting die has the advantages that the phenomenon of thimble breakage is not easy to occur, the demolding efficiency is higher, in addition, the problem that a product is stuck to the water opening of the front mold core during demolding in the prior art is solved, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of a prior art die casting mold;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic structural view of a die casting mold of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

fig. 5 is an enlarged view at C in fig. 4.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1, a die casting mold in the prior art is used for producing paired products, and includes a front mold core 11 and a rear mold core 12 which are stacked, the front mold core 11 is located on the rear mold core 12, the front mold core 11 is in a disc shape, two cavities 10 are arranged in the front mold core 11, and the two cavities 10 are symmetrically arranged in the front mold core 11. Two water gaps 13 are arranged on the side wall of each cavity 10, each water gap 13 is positioned at the junction of the front die core 11 and the rear die core 12 and protrudes out of the front die core 11, and the water gaps 13 are used for injecting slurry. The number of the water gaps 13 is not limited.

Four ejector pin cavities are arranged in the rear die core 12, an ejector pin 14 is arranged in each ejector pin cavity, the position of each ejector pin 14 corresponds to a water gap 13, and the ejector pins 14 are arranged in the rear die core 12 and can move up and down and are used for pushing the position of the water gap 13 of the front die core 11 by the top ends of the ejector pins 14 when a product is demoulded, so that the front die core 11 is separated from the rear die core 12, and the product is taken out from the die cavity 10 of the front die core 11.

Referring to fig. 2, in the prior art, when the front mold core 11 and the rear mold core 12 are adhered to each other, each water gap 13 is located in the corresponding thimble cavity, the cross section of the water gap 13 in the prior art in the direction perpendicular to the front mold core 11 is trapezoidal, the aperture of the end of the water gap 13 far away from the front mold core 11 is L1, the aperture of the end of the water gap 13 close to the front mold core 11 is L2, and L1 is greater than L2. The position of the thimble 14 close to the water gap 13 is trapezoidal, and the thimble 14 and the water gap 13 are in complementary shapes in the thimble cavity. The thimble 14 is close to the one end of front mould benevolence 11 and is included first horizontal plane 141, inclined plane 142 and the second horizontal plane 143 of end to end in proper order, first horizontal plane 141, inclined plane 142 and second horizontal plane 143 form the ladder shape on the top of thimble 14, the second horizontal plane 143 is kept away from the surface laminating of front mould benevolence 11 with mouth of a river 13, inclined plane 142 is laminated with the side of mouth of a river 13, first horizontal plane 141 is laminated with the product in the die cavity 10. The diameter of the end of the water gap 13 close to the front mold core 11 is 3mm, the diameter of the end of the water gap 13 far from the front mold core 11 is 4mm, the height of the water gap 13 along the direction of the ejector pin 14 is 4mm, and the diameter of the cross section of the ejector pin 14 far from the top end is 8 mm.

The structure of the gate 13 and the thimble 14 is complementary trapezoid, in order to make the product 10 easier to be demolded from the cavity 10 during demolding, the front mold core 11 is inverted on the rear mold core 12, the top end of the thimble 14 pushes the front mold core 11, the first transverse surface 141 of the thimble 14 pushes the front mold core 11, the second transverse surface 143 pushes the gate 13, so as to separate the front mold core 11 from the rear mold core 12, and then take out the product from the cavity 10 of the front mold core 11, the structure of the water gap 13 and the thimble 14 in the prior art makes the product take out from the cavity 10 of the front mold core 11, usually will glue the mouth of a river 13 department of front mould benevolence 11, the product drawing of patterns is inconvenient, must beat with the instrument and make the product break away from mouth of a river 13, in addition, the structural design of mouth of a river 13 and thimble 14 among the prior art, thimble 14 is because the uneven thimble phenomenon that easily appears of atress during the drawing of patterns, brings inconvenience in the production process.

Referring to fig. 3 and 4, the die casting mold of the present invention includes a front mold core 21 and a rear mold core 22 which are vertically disposed, the front mold core 21 is located on the rear mold core 22, the front mold core 21 is in a disc shape, two mold cavities 20 are disposed in the front mold core 21, and positions of the two mold cavities 20 in the front mold core 21 are bilaterally symmetric. The die-casting mold is mainly used for producing paired products, so that the front mold core 21 is set to be in a disc shape, and two cavities 20 are arranged on the front mold core 21. Two water gaps 23 are arranged on the side wall of each cavity 20, each water gap 23 is positioned at the junction of the front die core 21 and the rear die core 22 and protrudes out of the front die core 21, and the water gaps 23 are used for injecting slurry. Four ejector pin cavities are arranged in the rear die core 22, an ejector pin 24 is arranged in each ejector pin cavity, the position of each ejector pin 24 corresponds to one water gap 23, and the ejector pins 24 are arranged in the rear die core 22 and can move up and down.

The nozzle 23 is a flat cylinder, the height of the nozzle 23 is h1, h1 is 4mm, one end of the nozzle 23, which is far away from the front die core 21, is an open surface, a circle of arc-shaped protrusion 231 is arranged on the side surface of the nozzle 23, the distance from the arc-shaped protrusion 231 to the open surface is 1/4h1-1/3h1, namely 1mm-1.25mm, preferably 1mm, the length of the arc-shaped protrusion 231 in the height direction of the nozzle 23 is L5, the length of the arc-shaped protrusion 5 is 1mm-1.25mm, preferably 1mm, the height of the arc-shaped protrusion 231 relative to the sidewall protrusion of the nozzle 23 is h2, and the height of the arc-shaped protrusion 2 is 0.13-0.19mm, preferably 0.15 mm. The diameter of the nozzle 23 at the opening face is L3, L3 is 9.3mm, the diameter of the nozzle 23 at the arc-shaped protrusion 231 is L4, L4 is L3+ h2, L4 is 9mm, and h is 0.3 mm. The thimble 24 is a strip-shaped cylindrical body, the surface of the top end of the thimble 24 contacting the water gap 23 is the top surface of the thimble 24, the diameter of the top surface is d, and d is 8 mm. The top surface of the thimble 24 is located in the open surface of the water gap 23, and the diameter of the open surface of the water gap 23 is 1.1-1.5mm, preferably 1.3mm larger than that of the top surface of the thimble 24. In the embodiment, the side surface of the water gap 23 is inclined, the open surface of the water gap 23 is smaller than the surface of the water gap 23 away from the thimble 24, the side surface of the water gap 23 is inclined by an angle between 5 degrees and 20 degrees, preferably 15 degrees, and the side surface of the water gap 23 is inclined, so that the product is not easy to stick to the water gap, and the product is easier to separate from the water gap. In other embodiments, the diameter of the top surface is between 7.5 mm and 8.5mm, the diameter of the nozzle 23 at the open surface is between 8.8mm and 9.8mm, the height of the nozzle is between 3.5mm and 4.5mm, the distance of the arc-shaped protrusion from the open surface is between 0.5mm and 1.5mm, the length of the arc-shaped protrusion in the height direction of the nozzle is between 0.5mm and 1.5mm, and the height of the arc-shaped protrusion relative to the nozzle sidewall protrusion is between 0.1 mm and 0.2 mm.

According to the die-casting die, the shape of the water gap 23 is designed to be a flat cylindrical body, the ejector pin 24 is designed to be a strip-shaped cylindrical body, the top surface of the ejector pin 24 is designed to be a plane, the top surface of the ejector pin 24 is in contact with the open surface of the water gap 23 during die stripping to push the front die core 21, the ejector pin 24 is stressed in a balanced mode, the phenomenon of pin breakage is not prone to occur, and the aperture of the open surface of the water gap 23 is increased, so that when the ejector pin 24 pushes the open surface of the water gap 23, the front die core 21 is more prone to being separated from the rear die core 22 due to the fact that the stressed area is increased, and therefore production efficiency is improved. In addition, by designing the aperture of the open face of the nozzle 23 to be 1mm larger than the diameter of the top face of the thimble 24, the top end of the thimble 24 can push the product in the open face of the nozzle 23, that is, the top end of the thimble 24 pushes the open face of the nozzle 23 and pushes the product to be separated from the nozzle 23. The side surface of the water gap 23 of the flat cylindrical body is provided with the circle of arc-shaped protrusions 231, so that the contact surface of a product and the inner wall of the water gap 23 is smaller, the inner wall of the water gap 23 is not easy to stick to the product, the problem that the product in the prior art is stuck to the water gap 23 of the front mold core 21 when the product is taken out from the cavity of the front mold core 21 and is separated from the water gap 23 by knocking with a tool is avoided, and the problem that the product in the prior die-casting mold can be stuck to the water gap of the front mold core when the product is removed from the mold is solved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The die-casting die is characterized in that: including the front mold core and the back mold core of range upon range of setting, front mold core is the disc shape, set up two die cavities in the front mold core, two die cavities are the symmetry in front mold core and set up, and the lateral wall of every die cavity sets up a plurality of mouth of a river, and every mouth of a river is located the juncture of front mold core and back mold core and outstanding in front mold core, set up a plurality of thimble cavity in the back mold core, set up an thimble in every thimble cavity, the position of every thimble corresponds a mouth of a river, the thimble sets up in back mold core and can move about from top to bottom, the shape of mouth of a river is flat cylindricality body, the thimble is bar cylindricality body, the one end that front mold core was kept away from to the mouth of a river is open face, the thimble is the top surface of thimble with the face of mouth of a river contact, the top surface of thimble is the plane and is located in the open face of mouth of a river, the side of mouth of a river sets up the round arc protrudingly.

2. A die casting mold as claimed in claim 1, wherein: the diameter of the open face of the water gap is 1.1-1.5mm larger than that of the top face of the thimble.

3. A die casting mold as claimed in claim 2, wherein: the diameter of the top surface is between 7.5 and 8.5mm, and the diameter of the water gap at the open surface is between 8.8 and 9.8 mm.

4. A die casting mold as claimed in claim 3, wherein: the height of the water gap is between 3.5mm and 4.5mm, and the distance between the arc-shaped protrusion and the opening surface is between 1mm and 1.25 mm.

5. A die casting mold as claimed in claim 4, wherein: the length of the arc-shaped protrusion along the height direction of the water gap is between 1mm and 1.25 mm.

6. A die casting mold as claimed in claim 5, wherein: the height of the arc-shaped protrusion relative to the side wall protrusion of the nozzle is between 0.13 and 0.19 mm.

7. A die casting mold as claimed in claim 4, wherein: the distance between the arc-shaped protrusion and the open face is between 0.5mm and 1.5 mm.

8. A die casting mold as claimed in claim 5, wherein: the length of the arc-shaped protrusion along the height direction of the water gap is between 0.5mm and 1.5 mm.

9. A die casting mold as claimed in claim 6, wherein: the height of the arc-shaped protrusion relative to the side wall protrusion of the water gap is between 0.1 and 0.2 mm.

10. A die casting mold as claimed in claim 1, wherein: the side surface of the water gap is arranged to be inclined, the open surface of the water gap is smaller than the surface of the water gap far away from the thimble, and the inclined angle of the side surface of the water gap is between 5 degrees and 20 degrees.