Automobile part die-casting die

Abstract

The invention relates to the technical field of automobile part die-casting dies, in particular to an automobile part die-casting die which comprises a movable die body, a fixed die body, a hydraulic system, a fixed die core, a movable die core and a casting runner, the fixed die core and the movable die core are installed on the movable die body and the fixed die body respectively, a lower concave cavity is formed in the movable die core, an upper protrusion is arranged on the fixed die core, and the lower concave cavity is communicated with the upper protrusion. After the movable mold and the fixed mold are driven by the hydraulic system to be closed, a mold cavity is defined by the upper protrusion and the lower concave cavity, the mold is characterized by further comprising an upper heat dissipation resistance structure arranged on the fixed mold core and a lower heat dissipation resistance structure arranged on the movable mold core, the fixed mold core slows down in-mold heat dissipation of the fixed mold core through the upper heat dissipation resistance structure, and the lower heat dissipation resistance structure is arranged on the movable mold core through the lower heat dissipation resistance structure. The movable mold core slows down in-mold heat loss of the movable mold core through the lower resistance heat dissipation structure; the temperature in the die can be kept at 230-270 DEG C in the die casting process, the appearance defects of cracks, cold shut and the like caused by too low die casting temperature of magnesium alloy die castings are avoided, and the quality of formed workpieces is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts die casting mold, in particular to an automobile parts die casting mold. BACKGROUND

[0002] The die casting mold refers to the molten metal liquid under the action of pressure is injected into the mold to cool and form, and the solid metal casting can be obtained after the mold is opened, wherein in order to reduce the production quantity of automobile parts and improve the efficiency of automobile production, most of the existing flying car F34410023X3K sensor base are magnesium alloy die castings, and the material is HTMG1. Since the in-mold temperature during die casting of the ordinary mold cannot be maintained at 230-270°C, the magnesium alloy die casting after forming is prone to have cracks, cold shut and other appearance defects, which cannot meet the appearance requirements of the magnesium alloy die casting, and affects the quality of the formed workpiece. Therefore, the mold in the prior art is improved. SUMMARY

[0003] The purpose of the present application is to solve the above problems, provide an automobile parts die casting mold, which can maintain the in-mold temperature during die casting at 230-270°C, avoid cracks, cold shut and other appearance defects of magnesium alloy die casting due to too low die casting temperature, and improve the quality of the formed workpiece.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: An automobile parts die casting mold, comprising a movable mold and a fixed mold, a hydraulic system for driving the movable mold and the fixed mold to close, a fixed mold core and a movable mold core arranged opposite to each other, the fixed mold core and the movable mold core are respectively installed on the movable mold and the fixed mold, a lower concave cavity is arranged on the movable mold core, and an upper convex is arranged on the fixed mold core, the upper convex and the lower concave cavity form a mold cavity after the movable mold and the fixed mold are driven to close by the hydraulic system, a pouring channel communicating with the mold cavity is arranged on the fixed mold, characterized in that: it further comprises an upper heat dissipation resistance structure arranged on the fixed mold core and a lower heat dissipation resistance structure arranged on the movable mold core, the fixed mold core slows down the heat loss of the in-mold heat of the fixed mold core through the upper heat dissipation resistance structure, and the movable mold core slows down the heat loss of the in-mold heat of the movable mold core through the lower heat dissipation resistance structure.

[0005] Further, the upper heat dissipation resistance structure and the lower heat dissipation resistance structure are both a plurality of heat dissipation resistance grooves arranged on the fixed mold core and the movable mold core, and the heat dissipation resistance grooves are arranged on the contact surface of the fixed mold core and the fixed mold and the contact surface of the movable mold core and the movable mold.

[0006] Further, a plurality of the heat dissipation resistance grooves are equidistantly distributed on the fixed mold core and the movable mold core.

[0007] Further, the distance between adjacent heat dissipation resistance grooves is not greater than 20mm.

[0008] Further, the depth of the heat dissipation resistance groove is not less than 1mm.

[0009] Further, the heat dissipation resistance groove is a rectangular groove, four corners of the rectangular groove are arc-shaped corners, and an arc-shaped surface is formed between the groove bottom and the side surface of the rectangular groove.

[0010] Further, a plurality of slide columns are vertically arranged on the movable die, a demolding plate is slidably connected to the slide columns, a plurality of ejectors are vertically arranged on the demolding plate, and a demolding hole penetrating the movable die core is arranged opposite to the ejectors on the movable die core.

[0011] Further, the movable die comprises a base, support seats fixed on the base in left-right symmetry, a plurality of guide columns fixed on the support seats, a movable die seat slidably connected to the guide columns in up-down direction, and the movable die core is installed on the movable die seat, a plurality of clamping through holes and demolding through holes are arranged through the support seats, and the bottom ends of the slide columns are fixed on the base.

[0012] The beneficial effects of the present application are: After the movable die and the fixed die are clamped by the hydraulic system, the die cavity is formed between the upper protrusion and the lower cavity, the magnesium alloy casting liquid is injected into the die cavity through the high-pressure pouring channel, the heat loss of the fixed die core in the die is slowed down by the upper heat dissipation resistance structure, the heat loss of the movable die core in the die is slowed down by the lower heat dissipation resistance structure, the temperature in the die during the pressure casting process is maintained at 230-270°C by slowing down the heat loss of the fixed die core and the movable die core in the die, and the appearance defects such as cracks and cold shut of the magnesium alloy pressure casting caused by too low pressure casting temperature are avoided; the temperature in the die during the pressure casting process is maintained at 230-270°C, the appearance defects such as cracks and cold shut of the magnesium alloy pressure casting caused by too low pressure casting temperature are avoided, and the quality of the formed workpiece is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a front view of the present application; Figure 3 is a top view of the present application; Figure 4 is Figure 3 is a sectional view at A-A in the present application; Figure 5 is a schematic diagram of the structure of the movable die in the present application; Figure 6 is a schematic diagram of the structure of the fixed die in the present application; Figure 7 is a schematic diagram of the structure of the fixed die core in the present application from the first perspective; Figure 8 is a schematic diagram of the structure of the fixed die core in the present application from the second perspective; Figure 9 is the structure diagram of the first perspective of the movable mold core in the application; Figure 10 is the structure diagram of the second perspective of the movable mold core in the application; Figure: movable mold 1; base 101; support seat 102; guide column 103; movable mold seat 104; fixed mold 2; fixed mold core 3; upper protrusion 301; movable mold core 4; lower cavity 401; demolding hole 402; pouring runner 5; heat dissipation groove 61; rectangular groove 611; arc-shaped corner 612; arc-shaped surface 613; slide column 701; demolding plate 702; ejector pin 703. DETAILED DESCRIPTION

[0014] The following description is provided to disclose the application so that those skilled in the art can implement the application. The preferred embodiments in the following description are only examples, and other obvious modifications can be made by those skilled in the art.

[0015] As shown in Figures 1-10 A die-casting die for automobile parts, comprising a movable mold 1 and a fixed mold 2, a hydraulic system for driving the movable mold 1 and the fixed mold 2 to close, a fixed mold core 3 and a movable mold core 4 arranged opposite to each other, the fixed mold core 3 and the movable mold core 4 are respectively installed on the movable mold 1 and the fixed mold 2, the movable mold core 4 is provided with a lower cavity 401, the fixed mold core 3 is provided with an upper protrusion 301, after the movable mold 1 and the fixed mold 2 are driven to close by the hydraulic system, the upper protrusion 301 and the lower cavity 401 form a die cavity, the fixed mold 2 is provided with a pouring runner 5 communicating with the die cavity, characterized in that: further comprising an upper heat dissipation structure arranged on the fixed mold core 3, and a lower heat dissipation structure arranged on the movable mold core 4, the fixed mold core 3 slows down the heat dissipation in the die through the upper heat dissipation structure, and the movable mold core 4 slows down the heat dissipation in the die through the lower heat dissipation structure.

[0016] After the movable mold 1 and the fixed mold 2 are driven to close by the hydraulic system, the upper protrusion 301 and the lower cavity 401 form a die cavity, magnesium alloy casting liquid is injected into the die cavity through the pouring runner 5, the fixed mold core 3 slows down the heat dissipation in the die through the upper heat dissipation structure, and the movable mold core 4 slows down the heat dissipation in the die through the lower heat dissipation structure, by slowing down the heat dissipation in the die of the fixed mold core 3 and the movable mold core 4, the temperature in the die during the die-casting process is maintained at 230-270°C, avoiding cracks, cold shuts and other appearance defects of magnesium alloy die castings due to too low die-casting temperature; the application can maintain the temperature in the die during the die-casting process at 230-270°C, avoiding cracks, cold shuts and other appearance defects of magnesium alloy die castings due to too low die-casting temperature, and improving the quality of the formed workpiece.

[0017] As shown in Figures 1-10As shown in the drawings, the upper and lower heat dissipation structures are a plurality of heat dissipation grooves 61 arranged on the fixed mold core 3 and the movable mold core 4, and the heat dissipation grooves 61 are arranged on the contact surface of the fixed mold core 3 and the fixed mold 2 and the contact surface of the movable mold core 4 and the movable mold 1; in this embodiment, the contact area between the fixed mold core 3 and the fixed mold 2 is reduced through the plurality of heat dissipation grooves 61 on the contact surface of the fixed mold core 3 and the fixed mold 2, so as to reduce the heat conduction area and slow down the heat dissipation of the fixed mold core 3 in the mold; the contact area between the movable mold core 4 and the movable mold 1 is reduced through the plurality of heat dissipation grooves 61 on the contact surface of the movable mold core 4 and the movable mold 1, so as to reduce the heat conduction area and slow down the heat dissipation of the movable mold core 4 in the mold; the temperature in the mold during the die casting process is kept at 230-270°C by slowing down the heat dissipation of the fixed mold core 3 and the movable mold core 4 in the mold, so as to avoid cracks and cold shuts and other appearance defects of the magnesium alloy die casting caused by too low die casting temperature, and improve the quality of the workpiece after forming; wherein the fixed mold core 3 is fixed on the fixed mold 2 by bolts, the movable mold core 4 is fixed on the movable mold 1 by bolts, and the materials of the movable mold 1 and the fixed mold 2 are selected from 8418 mold steel.

[0018] As shown in the drawings, Figures 1-10 the plurality of heat dissipation grooves 61 are equidistantly distributed on the fixed mold core 3 and the movable mold core 4; in this embodiment, the heat conduction is slowed down more effectively by equidistantly distributing the plurality of heat dissipation grooves 61 on the contact surface of the fixed mold core 3 and the fixed mold 2 and the contact surface of the movable mold 1 and the movable mold core 4.

[0019] As shown in the drawings, Figures 1-10 the spacing between adjacent heat dissipation grooves 61 is not greater than 20mm; in this embodiment, when the spacing between adjacent heat dissipation grooves 61 is not greater than 20mm, the contact surface of the fixed mold core 3 and the fixed mold 2 and the contact surface of the movable mold 1 and the movable mold core 4 are small, and the connection strength between the fixed mold core 3 and the fixed mold 2 and between the movable mold 1 and the movable mold core 4 can be ensured.

[0020] As shown in the drawings, Figures 1-10 the depth of the heat dissipation groove 61 is not less than 1mm; in this embodiment, when the depth of the heat dissipation groove 61 is not less than 1mm, the heat conduction is slowed down more effectively.

[0021] As shown in the drawings, Figures 1-10 the heat dissipation groove 61 is a rectangular groove 611, the four corners of the rectangular groove 611 are arc-shaped corners 612, and an arc surface 613 is formed between the groove bottom and the side surface of the rectangular groove 611; in this embodiment, when the heat dissipation groove 61 is a rectangular groove 611, more rectangular grooves 611 can be distributed on the contact surface of the fixed mold core 3 and the fixed mold 2 and the contact surface of the movable mold 1 and the movable mold core 4, and the heat conduction is slowed down more effectively.

[0022] As shown in the drawings, Figures 1-10As shown, the movable die 1 is vertically provided with a plurality of slide columns 701, the slide columns 701 are slidably connected with a stripper plate 702, the stripper plate 702 is vertically provided with a plurality of ejector pins 703, the movable die core 4 is provided with a demolding hole 402 penetrating the movable die core 4 opposite to the ejector pins 703; in this embodiment, after the die casting, the stripper plate 702 is driven to rise along the slide columns 701 by the hydraulic system, the ejector pins 703 are driven to pass through the demolding hole 402 and out of the movable die core 4, the magnesium alloy die casting formed in the lower concave cavity 401 is ejected; wherein, the fixed die 2 is fixed above the movable die 1, the hydraulic system is at least two vertically arranged hydraulic cylinders, one hydraulic cylinder is used to drive the movable die 1 to rise and close the mold, and the other hydraulic cylinder is used to drive the stripper plate 702 to rise and fall.

[0023] As shown in the drawings, Figures 1-10 The movable die 1 comprises a base 101, a support seat 102 fixed on the base 101 in left-right symmetry, a plurality of guide columns 103 fixed on the support seat 102, a movable die seat 104 slidably connected on the guide columns 103, the movable die core 4 is installed on the movable die seat 104, a plurality of mold closing through holes and demolding through holes are provided through the support seat 102, and the bottom end of the slide column 701 is fixed on the base 101; in this embodiment, the movable die seat 104 in the mold closing process is guided by the guide column 103, the mold closing hydraulic cylinder is inserted through the mold closing through hole, the movable die seat 104 is pushed to rise and close the mold, and the demolding hydraulic cylinder is inserted through the demolding through hole, the movable die seat 104 is pushed to drive the stripper plate 702 to rise and fall.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the scope defined by the spirit of the present application.

Claims

1. A die-casting mold for automotive parts, comprising a moving mold (1) and a fixed mold (2), a hydraulic system for driving the moving mold (1) and the fixed mold (2) to close, a fixed mold core (3) and a moving mold core (4) arranged opposite each other, the fixed mold core (3) and the moving mold core (4) being respectively mounted on the moving mold (1) and the fixed mold (2), the moving mold core (4) being provided with a recessed cavity (401), the fixed mold core (3) being provided with an upper protrusion (301), after the hydraulic system drives the moving mold (1) and the fixed mold (2) to close, the upper protrusion (301) and the recessed cavity (401) enclose to form a mold cavity, the fixed mold (2) being provided with a casting flow channel (5) communicating with the mold cavity, characterized in that: It also includes an upper heat dissipation structure set on the fixed mold core (3) and a lower heat dissipation structure set on the moving mold core (4). The fixed mold core (3) reduces the heat loss inside the mold through the upper heat dissipation structure, and the moving mold core (4) reduces the heat loss inside the mold through the lower heat dissipation structure.

2. The die-casting mold for automotive parts according to claim 1, characterized in that, The upper heat dissipation structure and the lower heat dissipation structure are both multiple heat dissipation grooves (61) set on the fixed mold core (3) and the moving mold core (4). The heat dissipation grooves (61) are set on the contact surface of the fixed mold core (3) and the fixed mold (2) and the contact surface of the moving mold core (4) and the moving mold (1).

3. The die-casting mold for automotive parts according to claim 2, characterized in that, Multiple heat-dissipating grooves (61) are equidistantly distributed on the fixed mold core (3) and the moving mold core (4).

4. The die-casting mold for automotive parts according to claim 2, characterized in that, The spacing between adjacent heat-blocking grooves (61) is no more than 20 mm.

5. The die-casting mold for automotive parts according to claim 2, characterized in that, The depth of the heat-blocking groove (61) is not less than 1 mm.

6. The die-casting mold for automotive parts according to claim 2, characterized in that, The heat-blocking groove (61) is a rectangular groove (611), the four corners of the rectangular groove (611) are arc corners (612), and an arc surface (613) is formed between the bottom of the rectangular groove (611) and the side surface.

7. The die-casting mold for automotive parts according to claim 1, characterized in that, The moving mold (1) has multiple vertically arranged sliding pillars (701), and a stripping plate (702) is slidably connected to the sliding pillars (701). The stripping plate (702) has multiple vertically arranged ejector pins (703), and the moving mold core (4) has a stripping hole (402) that penetrates the moving mold core (4) opposite the ejector pins (703).

8. The die-casting mold for automotive parts according to claim 7, characterized in that, The moving mold (1) includes a base (101), a support seat (102) symmetrically fixed on the base (101), multiple guide columns (103) fixed on the support seat (102), and a moving mold seat (104) slidably connected to the guide columns (103). The moving mold core (4) is installed on the moving mold seat (104). The support seat (102) has multiple mold closing through holes and demolding through holes. The bottom end of the sliding column (701) is fixed on the base (101).

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