CN117259719A - Die casting die of special-shaped long thin-wall aluminum alloy casting for vehicle - Google Patents
Die casting die of special-shaped long thin-wall aluminum alloy casting for vehicle Download PDFInfo
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- CN117259719A CN117259719A CN202311553879.8A CN202311553879A CN117259719A CN 117259719 A CN117259719 A CN 117259719A CN 202311553879 A CN202311553879 A CN 202311553879A CN 117259719 A CN117259719 A CN 117259719A
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- 238000005266 casting Methods 0.000 title claims abstract description 66
- 238000004512 die casting Methods 0.000 title claims abstract description 30
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 19
- 238000000465 moulding Methods 0.000 claims description 141
- 239000002893 slag Substances 0.000 claims description 78
- 238000007599 discharging Methods 0.000 claims description 39
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2236—Equipment for loosening or ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a die casting die for an aluminum alloy casting for a special-shaped long thin-wall vehicle, which comprises a fixed die device, a movable die device movably folded to the fixed die device and two sliding block devices symmetrically arranged on the movable die device. The forming seat slides in the forming area and the end face of the forming seat faces the deep cavity area so as to form the lateral cavity wall of the deep cavity area and correspond to the lateral characteristics of the casting, reduce deep processing and modeling of the deep cavity area groove and reduce the processing difficulty of the die. The end face of the forming column is abutted against the lateral cavity wall of the deep cavity area and compressed for a preset length, when the casting is processed and demoulded, the forming seat and the side face of the casting are demoulded firstly, and the forming column keeps an abutting posture. After the demoulding is completed, the forming seat continuously moves and drives the forming column to demould with the casting, so that secondary step-by-step demoulding is formed, single demoulding force on the side surface of the casting is reduced, and casting deformation and strain are reduced.
Description
Technical Field
The invention relates to the technical field of aluminum die casting, in particular to an aluminum die casting die, and especially relates to a die casting die for an aluminum alloy casting for a special-shaped long thin-wall vehicle.
Background
The special-shaped long thin-wall aluminum alloy casting for the vehicle comprises a connecting wall and at least two flat vertical walls protruding out of the connecting wall at intervals, wherein the lateral wall surfaces of the flat vertical walls are provided with surface molding characteristics such as concave holes, hollows, convex ribs, bosses and the like.
The aluminum die casting die can be used for lateral surface feature molding of products through structures such as lateral sliding blocks, as disclosed in China publication CN202398797U, the aluminum alloy die casting die for the dimming bracket of the front lamp of the thin-wall deep cavity automobile adopts a cup type casting mechanism, the bottom of the cup type casting mechanism is communicated with a die runner, a vacuum exhaust mechanism is positioned at the left side of a cavity of a lower die, the rear side of the cavity of the die is provided with a side sliding block core pulling mechanism, and the structure is not applicable to castings with multiple vertical walls. Or, for example, a thin-wall deep cavity product forming die structure is disclosed in China publication No. CN 210190451U.
Because the flat vertical wall of the special-shaped long thin-wall vehicle aluminum alloy casting is thin and has complex molding characteristics, the existing aluminum alloy mold has the technical problems of high molding difficulty, easy air hole generation in the demolding process, easy breakage, scratch or deformation of the product in demolding and the like, and therefore, the improvement is needed.
Disclosure of Invention
In order to overcome the problems in the related art, the embodiment of the invention provides a die casting die for an aluminum alloy casting for a special-shaped long thin-wall vehicle, which is used for solving the technical problems that the molding difficulty is high, air holes are easily formed in the demolding process, and the demolding is easy to break or deform.
According to a first aspect of the embodiment of the invention, a die casting die for an aluminum alloy casting for a special-shaped long thin-wall vehicle is provided, and comprises a fixed die device, a movable die device movably folded to the fixed die device and two sliding block devices symmetrically arranged on the movable die device, wherein the movable die device comprises a movable die frame and a movable die holder arranged on the movable die frame, and the movable die holder comprises a first deep groove and a second deep groove which are symmetrically recessed from a die-combining surface and a plurality of slag ladle grooves distributed on the die-combining surface;
the first deep groove comprises a deep cavity area, a forming area intersected to the deep cavity area and a slag discharging area recessed from the bottom wall of the forming area, the depth of the forming area is smaller than or equal to the height of the intersection part of the deep cavity area, the slag discharging area is provided with a plurality of slag discharging grooves, and the slag discharging grooves are correspondingly communicated to the slag ladle grooves through diversion runners;
the sliding block device comprises a mounting frame fixed on the movable die device, a telescopic power piece fixed on the mounting frame, a forming seat connected with the telescopic power piece, at least one forming column sliding on the forming seat, and an elastic piece elastically connecting the forming seat and the forming column, wherein the forming seat slides in the forming area, and the forming column stretches out of the forming seat for a preset length under the action of elastic pre-tightening force of the elastic piece;
the molding seat slides along the molding area and abuts against the movable mold seat under the driving of the telescopic power piece, the end face of the molding seat forms a lateral cavity wall of the molding area, and the molding column abuts against the lateral cavity wall of the deep cavity area and compresses for a preset length;
the molding seat covers the notch of the slag discharging groove, the slag discharging groove is communicated with the molding area through a chute, wherein the surrounding space of the fixed mold device, the end surface of the molding seat, the surface of the molding column, the deep cavity area and the molding area forms the molding space of the aluminum alloy casting for the vehicle.
In an embodiment, the molding seat is provided with at least one molding boss, the molding boss extends into the first deep groove, and the molding column extends along the molding boss.
In an embodiment, the bottom of the molding area is concavely and obliquely arranged towards the center direction, and the molding seat is obliquely and slidingly connected with the bottom of the molding area.
In an embodiment, the molding post includes a cylindrical portion sliding on the molding seat and a molding portion located at an end of the cylindrical portion, wherein a cross-sectional dimension of the molding portion is greater than a cross-sectional dimension of the cylindrical portion, and the molding portion is engaged with or exceeds the molding boss.
In an embodiment, the molding part includes a molding end and an abutment end protruding from the molding end, the cross-sectional dimension of the molding end is larger than the cross-sectional dimension of the abutment end, and the abutment end is used for abutting against the lateral cavity wall of the deep cavity region.
In an embodiment, the slag ladle grooves are symmetrically distributed on the die-combining surface, at least two slag discharging grooves are arranged and are distributed in the slag discharging area at intervals, and the slag discharging grooves are communicated in series through a runner.
In an embodiment, the movable die holder comprises a separation boss protruding from the deep cavity area partially, the separation boss is provided with a clearance gap, and the forming boss is in plug-in fit with the clearance gap.
In an embodiment, the movable die holder comprises a central runner arranged in the middle and a plurality of branch runners distributed on two sides of the central runner, and the branch runners are respectively communicated with the first deep groove and the second deep groove;
the movable die device further comprises a top plate seat and a thimble assembly sliding on the movable die seat, the thimble assembly comprises a plurality of first-stage thimbles and second-stage thimbles, the first-stage thimbles are aligned to the deep cavity area, the second-stage thimbles are respectively aligned to the slag ladle groove, the slag discharge groove, the central runner and the branch runner, the first-stage thimbles are connected to the top plate seat through springs, a first gap is reserved between the first-stage thimbles and the top plate seat, and the second-stage thimbles are fixed on the top plate seat so that the second-stage thimbles are abutted to the formed aluminum alloy castings in advance of the first-stage thimbles.
In one embodiment, a clamping boss is formed on one side of the molding seat, which faces the fixed mold device in a protruding way; the fixed die device is provided with a clamping groove matched with the clamping boss, the fixed die device is folded to the movable die device, and the clamping groove is buckled and locked with the clamping boss.
In an embodiment, the die casting mold further comprises a cooling water path connected to the movable die holder, wherein the cooling water path is distributed in an area between the first deep groove and the second deep groove and symmetrically distributed.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects: the forming seat slides in the forming area and the end face of the forming seat faces the deep cavity area so as to form the lateral cavity wall of the deep cavity area and correspond to the lateral characteristics of the casting, reduce deep processing and modeling of the deep cavity area groove and reduce the processing difficulty of the die.
The forming area is a groove space which is intersected to the deep cavity area, the slag discharging area is positioned at the bottom of the forming area to bear and store molten metal overflowed from the bottom of the deep cavity area, so that the forming quality of the deep cavity area is high, and the defects of bubbles, slag bags and the like in the area corresponding to the deep cavity area are avoided. The slag discharging area is communicated with the slag ladle groove on the surface to form a continuous overflow structure, and the slag discharging area forms a middle feeding cavity to feed the casting formed in the deep cavity area, so that the stable forming quality of the thin-wall end face of the casting is ensured, and the dimensional accuracy is high.
The end face of the forming column is abutted against the lateral cavity wall of the deep cavity area and compressed for a preset length, when the casting is processed and demoulded, the forming seat and the side face of the casting are demoulded firstly, and the forming column keeps an abutting posture. After the demoulding is completed, the forming seat continuously moves and drives the forming column to demould with the casting, so that secondary step-by-step demoulding is formed, single demoulding force on the side surface of the casting is reduced, and casting deformation and strain are reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a die casting mold according to an exemplary embodiment.
Fig. 2 is a schematic cross-sectional structure of a die casting mold according to an exemplary embodiment.
Fig. 3 is a schematic view of a die casting mold of a hidden stationary mold apparatus according to an exemplary embodiment.
Fig. 4 is an enlarged schematic view at a in fig. 2.
Fig. 5 is an enlarged schematic view at B in fig. 2.
Fig. 6 is a schematic view of a movable die holder according to an exemplary embodiment.
Fig. 7 is a schematic structural view of a slider device according to an exemplary embodiment.
Fig. 8 is a schematic structural view of a stationary mold apparatus according to an exemplary embodiment.
In the drawing, a movable mold device 10; a movable die frame 11; a movable die holder 12; a first deep groove 121; deep cavity region 1211; a molding zone 1212; a slag discharge region 1213; a slag discharge groove 12131; a partition boss 1214; a void-avoidance gap 1215; a second deep groove 122; a die-bonding surface 123; slag ladle grooves 124; a central flow passage 125; a branch flow passage 126; a flow guide channel 127; a thimble assembly 13; a first-stage ejector pin 131; a second stage ejector pin 132; a top plate base 133; a spring 134; a stationary mold device 20; a clamping groove 21; a pouring channel 22; an expansion groove 23; a fixed die holder 24; a slider device 30; a telescopic power member 31; a mounting frame 32; a molding seat 33; a shaped boss 331; a forming post 34; a molding portion 341; an abutment end 3411; modeling end 3412.
Detailed Description
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 4, the present invention provides a die casting mold for an aluminum alloy casting for a long and thin-walled profiled vehicle, the die casting mold comprising a fixed mold device 20, a movable mold device 10 movably folded to the fixed mold device 20, and two slide block devices 30 symmetrically installed to the movable mold device 10. The fixed mold device 20 and the movable mold device 10 are closed to be in a mold closing posture, and are separated from each other to be in a mold opening state. The two slide block devices 30 are disposed on opposite sides of the movable mold device 10 to form a symmetrical distribution. The die casting die can synchronously form two paired castings, so that the die casting die is suitable for two parts which are paired on a vehicle, the die utilization rate is improved, the turnover efficiency of products is improved, and the product stock period and the waiting pairing period are reduced.
The movable die device 10 comprises a movable die frame 11 and a movable die holder 12 arranged on the movable die frame 11, wherein a mounting hole is formed in the middle of the movable die frame 11, and the movable die holder 12 is embedded and fixed in the mounting hole and fixedly connected with the movable die frame 11. The surface of the movable mold base 12, which is folded and attached to the fixed mold device 20, is a mold closing surface 123, and the movable mold base 12 includes a first deep groove 121 and a second deep groove 122 formed by being recessed symmetrically from the mold closing surface 123, and a plurality of slag inclusion grooves 124 distributed on the mold closing surface 123. The first deep groove 121 and the second deep groove 122 form a cavity space of two paired products, and the slag ladle grooves 124 are arranged in a plurality and are communicated to the first deep groove 121 and the second deep groove 122 at intervals so as to accommodate substances such as gas, impurities and the like overflowed from the cavity space. Slag ladle grooves 124 are distributed on the die clamping surface 123 to facilitate processing and air discharge.
The first deep groove 121 comprises a deep cavity region 1211, a molding region 1212 intersecting the deep cavity region 1211 and a slag discharging region 1213 recessed from the bottom wall of the molding region 1212, wherein the molding region 1212 is located at one side of the deep cavity region 1211 and is in parallel communication with the deep cavity region 1211, the deep cavity region 1211 is a cavity structure of a casting, and the molding region 1212 is an active region of the slider device 30 to construct a lateral molding structure of a product in cooperation with the deep cavity region 1211.
The depth of the molding zone 1212 is less than or equal to the height of the intersection of the deep cavity zone 1211, the deep cavity zone 1211 being flush or recessed relative to the bottom wall of the molding zone 1212, reducing the mold release depth of the deep cavity zone 1211 relative to the cast portion. The slag discharging area 1213 is provided with a plurality of slag discharging grooves 12131, and slag discharging grooves 12131 are correspondingly communicated to slag ladle grooves 124 through guide runners 127. The slag discharging grooves 12131 are distributed in the slag discharging area 1213 and are close to the bottom of the deep cavity area 1211, so that the deep cavity area 1211 can be fully filled, and the occurrence of bubbles, slag inclusions and other impurity defects can be reduced or even avoided. Alternatively, the slag discharging grooves 12131 are spaced apart along the longitudinal direction of the deep cavity 1211 and are adjacent to the two side walls of the molding zone 1212, and the flow guide channels 127 extend along the side walls and are connected to the nearest slag discharging groove 12131. The slag discharge tank 12131 constitutes a small molten pool to pool part of the molten metal.
The forming region 1212 is a groove space intersecting to the deep cavity region 1211, and the slag discharging region 1213 is positioned at the bottom of the forming region 1212 to bear and store molten metal overflowed from the bottom of the deep cavity region 1211, thereby ensuring high forming quality of the deep cavity region 1211 and avoiding defects such as bubbles and slag ladles in the region corresponding to the deep cavity region 1211. The slag discharging area 1213 is communicated with the slag ladle 124 on the surface to form a continuous overflow structure, and the slag discharging area 1213 forms a middle feeding cavity to feed the casting formed in the deep cavity area 1211, so that the stable forming quality of the thin-wall end face of the casting and high dimensional accuracy are ensured.
As shown in fig. 2, 3 and 7, the slide device 30 includes a mounting frame 32 fixed to the movable mold device 10, a telescopic power member 31 fixed to the mounting frame 32, a forming seat 33 connected to the telescopic power member 31, at least one forming column 34 sliding on the forming seat 33, an elastic member elastically connecting the forming seat 33 and the forming column 34, the forming seat 33 sliding on the forming region 1212, and the forming column 34 extending out of the forming seat 33 by a preset length under the elastic pre-tightening force of the elastic member.
The telescopic power piece 31 drives the forming seat 33 to move in a telescopic way, the forming seat 33 slides along the forming area 1212 and abuts against the movable die holder 12 under the drive of the telescopic power piece 31, and the end face of the forming seat 33 forms a lateral cavity wall of the forming area 1212. The surface of the molding seat 33 facing the direction of the deep cavity 1211 has a molding surface that constitutes one side wall of the deep cavity 1211. The forming seat 33 slides in the forming area 1212 and the end face of the forming seat 33 faces the deep cavity area 1211 to form the lateral cavity wall of the deep cavity area 1211 and correspond to the lateral characteristics of the casting, so that the deep cavity area 1211 groove depth processing and modeling are reduced, and the die processing difficulty is reduced. The molding bed 33 moves along the molding zone 1212, the sidewall of the molding bed 33 mates with the sidewall of the molding zone 1212, and the bottom surface of the molding bed 33 mates with the bottom surface of the molding zone 1212. The telescopic power piece 31 retracts and drives the forming seat 33 to be far away from the movable die holder 12 so as to form a demoulding function.
The molding post 34 is mounted on the molding seat 33 and protrudes out of the surface of the molding seat 33, the molding post 34 and the molding seat 33 are abutted against the lateral cavity wall of the deep cavity 1211, and after the molding seat 33 is abutted against the movable mold base 12, the molding post 34 is abutted against the lateral cavity wall of the deep cavity 1211 and compressed for a preset length. There is an elastic pre-tension between the profiled column 34 and the lateral cavity wall of the deep cavity 1211, and the end face of the profiled column 34 abuts against the lateral cavity wall of the deep cavity 1211 and compresses a predetermined length. When the casting is finished and demolded, the molding seat 33 is demolded with the side face of the casting first, and the molding column 34 maintains the abutting posture. After the demoulding is completed, the forming seat 33 continuously moves and drives the forming column 34 to demould with the casting, so that secondary step-by-step demoulding is formed, single demoulding force on the side surface of the casting is reduced, and casting deformation and strain are reduced.
As shown in fig. 2 and 3, the molding seat 33 covers the notch of the slag discharging groove 12131, the slag discharging groove 12131 is communicated with the molding zone 1212 through a chute, wherein the surrounding spaces of the fixed mold device 20, the end face of the molding seat 33, the surface of the molding column 34, the deep cavity zone 1211 and the molding zone 1212 constitute a molding space of the aluminum alloy casting for the vehicle. The slag discharge groove 12131 is located in the coverage area of the forming seat 33 and is communicated with the slag discharge groove 12131 and the forming space through the chute, so that the combination area of the slag discharge groove 12131 and a casting is reduced, the convenience of cutting a material handle is improved, and the influence of the material handle is reduced.
The forming stations 33 are used to construct castings, with complementary forms being used to construct lateral shapes. The first deep groove 121 may be disposed corresponding to a plurality of concave spaces spaced apart in parallel on the flat standing wall, and in an embodiment, the forming seat 33 is provided with at least one forming boss 331, the forming boss 331 extends into the first deep groove 121, and the first deep groove 121 is configured to insert the first deep groove 121 into communication, so as to form a concave casting matched with the forming boss 331. The molding column 34 extends along the molding boss 331, and the molding boss 331 and the molding column 34 are matched with the boss and the groove inside the first deep groove 121, so that die casting molding of the complex casting can be realized.
As shown in fig. 2, 3 and 6, the movable die holder 12 preferably includes a partition boss 1214 partially protruding from the deep cavity 1211, the partition boss 1214 being provided with a clearance gap 1215, and the shaped boss 331 being plug-fitted into the clearance gap 1215. The partition boss 1214 protrudes from the bottom of the deep chamber region 1211 to constitute a rib or boss structure, thereby partially partitioning the deep chamber region 1211 into two spaces. The forming boss 331 moves with the forming seat 33 and is in plug-in fit with the partition boss 1214, so that the casting formed by the space on one side partitioned by the partition boss 1214 has a functional hole structure. If the casting has a U-shaped structure, the forming boss 331 forms a hollow structure with a rectangular hole or an arch hole or other shapes on one side of the casting.
In one embodiment, the bottom of the molding region 1212 is concavely inclined toward the center, and the molding seat 33 is connected to the bottom of the molding region 1212 in an inclined sliding manner. The bottom of the molding zone 1212 is provided with an inclined surface, which not only can guide the molding seat 33 to slide obliquely, but also can lead the molten metal to be converged to the junction of the molding zone 1212 and the deep cavity zone 1211, thereby improving the molding quality of the deep cavity zone 1211.
As shown in fig. 2, 4 and 7, in one embodiment, the molding post 34 includes a cylindrical portion sliding on the molding seat 33 and a molding portion 341 located at an end of the cylindrical portion, where a cross-sectional dimension of the molding portion 341 is larger than a cross-sectional dimension of the cylindrical portion, and the molding portion 341 is engaged with or exceeds the molding boss 331. The molding post 34 is matched with the molding seat 33 to trim the side face and the slot shape of the casting, wherein the large end of the molding post 34 is embedded into the molding seat 33 in the mold closing state to form continuous side face shape construction.
The column part is a guide column part sliding on the forming seat 33, and the column part can be provided in a cylindrical shape or a prismatic shape to form an oriented sliding structure. Preferably, two molding columns 34 are provided, and the two molding columns 34 are arranged in parallel and jointly define the molding seat 33, so that the smoothness of movement of the molding seat 33 is further improved. Preferably, the forming seat 33 is provided with a stepped hole-like orientation hole, the large hole of which is provided with at least one guide surface, the cylindrical portion sliding in the orientation hole and mutually defining with the guide surface. The elastic piece is elastic to the orientation hole and elastically pushes the column part to extend outwards of the forming seat 33.
The forming part 341 is disposed at the end of the column part to correspond to the lateral hole structure of the formed casting. Wherein, the forming portion 341 includes a forming end 3412 and an abutting end 3411 protruding from the forming end 3412, the cross-sectional dimension of the forming end 3412 is larger than the cross-sectional dimension of the abutting end 3411, and the abutting end 3411 is used for abutting against the lateral cavity wall of the deep cavity 1211. Abutment end 3411 and contoured end 3412 are configured to approximate a stepped configuration with abutment end 3411 abutting against a lateral cavity wall of deep cavity region 1211 to stop the position of contoured post 34. The molding end 3412 not only can adapt to the external dimension of the casting, but also can be matched and abutted to the side wall of the casting during demolding, so that the molding seat 33 and the molding column 34 are separated step by step, and the molding column 34 provides lateral positioning support for the casting and can reduce demolding resistance area. Meanwhile, when the molding seat 33 and the casting are demolded, the demolding force for driving the casting to act on the molding end 3412 through the casting so as to separate the casting from the abutting end 3411, and the abutting end 3411 can keep abutting the casting under the action of elastic force until the molding seat 33 moves to drive the molding column 34 to be far away from the casting. Optionally, the shaped end is configured as a stepped curved surface, a convex cylindrical surface, and other concave-convex surface structures.
As shown in fig. 2, 3 and 8, in one embodiment, the slag ladle grooves 124 are symmetrically distributed on the die surface 123, and the slag discharging grooves 12131 are at least two and are spaced apart from the slag discharging area 1213, and the slag discharging grooves 12131 are connected in series through the flow passage. A portion of the slag ladle grooves 124 communicate with the deep cavity 1211, and a portion of the slag ladle grooves 124 are disposed on one side of the deep cavity 1211 and communicate with the slag ladle 12131 such that a portion of the slag ladle and gas within the slag ladle 12131 enters the slag ladle grooves 124 at the clamping surface 123 along the flow guide flow passage 127. The slag discharging grooves 12131 of the forming area 1212 are arranged at intervals and communicated through a runner to form a communicated molten pool structure, so that the smoothness of circulation is improved. Preferably, the volume of the slag discharging groove 12131 is greater than the volume of the slag ladle groove 124 so that the slag discharging region 1213 can increase the molten metal capacity, and the molten metal is supplied as a feeding point. Further, the slag discharging groove 12131 has a long groove structure, and the length direction of the slag discharging groove 12131 is parallel to the length direction of the intersection part of the molding region 1212 and the deep cavity region 1211, so as to enlarge the flow area and the feeding range.
The fixed mold device 20 and the movable mold device 10 are closed to each other, and the fixed mold device 20 is provided with a pouring passage 22 into which molten metal is poured. The movable mold base 12 includes a central flow channel 125 centrally disposed and a plurality of branch flow channels 126 distributed on two sides of the central flow channel 125, and the branch flow channels 126 are respectively connected to the first deep groove 121 and the second deep groove 122. The central runner 125 communicates with the pouring channel 22 in correspondence to allow molten metal to flow into the plurality of branch channels along the central runner 125. Alternatively, the branched runners 126 are symmetrically distributed on both sides of the central runner 125 to form the first deep groove 121 and the second deep groove 122 on both sides, which have balanced flow velocity and uniform molding quality. Preferably, three sets of branch flow channels 126 are provided on both sides of the central flow channel 125 to form a multi-point flow.
Taking the intersection of the branch flow channel 126 and the first deep groove 121 as an example, in one embodiment, a molten pool groove is disposed at the intersection of the branch flow channel 126 and the first deep groove 121, the depth of the molten pool groove is greater than the depth of the branch flow channel 126, and the cross-sectional width of the molten pool groove is greater than the cross-sectional width of the branch flow channel 126. Preferably, the depth of the branch flow passage 126 is smaller than that of the central flow passage 125, the end of the branch flow passage 126 intersects with the first deep groove 121, and the end of the branch flow passage 126 is curved in an arc shape. The fixed mold device 20 comprises a fixed mold base 24 which is folded with the movable mold base 12, the fixed mold base 24 is provided with an expansion groove 23, and the expansion groove 23 is correspondingly combined with the tail end of the branch runner 126 to form a molten pool groove. The space of the molten pool groove part is formed by the expansion groove 23, so that the interval distance between the first deep groove 121 and the second deep groove 122 in the movable die holder 12 can be reduced, the die size can be reduced, the volume of the molten pool can be enlarged, and the feeding performance and the demoulding quality can be improved.
As shown in fig. 2, 3 and 5, in order to improve the demolding efficiency and the demolding quality of the castings, the movable mold device 10 further includes a top plate seat 133 and a thimble assembly 13 sliding on the movable mold seat 12, and the thimble assembly 13 can synchronously push the castings to separate from the movable mold device 10 in the mold opening posture so as to take out the castings.
In a preferred embodiment, the thimble assembly 13 includes a plurality of first-stage thimbles 131 and second-stage thimbles 132, the first-stage thimbles 131 are aligned to the deep cavity 1211, the second-stage thimbles 132 are aligned to the slag notch 124, the slag notch 12131, the central runner 125 and the branch runners 126, the first-stage thimbles 131 are connected to the top plate base 133 by springs 134, a first gap is provided between the first-stage thimbles 131 and the top plate base 133, and the second-stage thimbles 132 are fixed to the top plate base 133, so that the second-stage thimbles 132 abut against the formed aluminum alloy castings before the first-stage thimbles 131. Because the combining depth of the flat vertical wall and the movable die holder 12 of the special-shaped long thin-wall vehicle aluminum alloy casting is large, the demoulding resistance is large, and the flat vertical wall is easy to be pulled by directly pushing the flat vertical wall. The first-stage thimble 131 and the second-stage thimble 132 are propped against the top plate seat 133 in different stages, so that the material handle of the casting firstly jacks up a small part of the gap and can drive a part of the gap, and the flat vertical wall receives lateral force. The first-stage ejector pins 131 and the second-stage ejector pins 132 are combined to push the flat vertical wall to be separated from the first deep groove 121, so that the demolding resistance of the flat vertical wall is reduced, and the surface quality of a product is improved. In this embodiment, the first-stage ejector pins 131 and the second-stage ejector pins 132 are configured to eject the cast product from different regions in order to achieve the effect of reducing the resistance of the product portion of the ejected cast product. Optionally, the first gap may be configured to be 0.5-2 mm to achieve a differently formed demolding gap. Specifically, the first gap may be configured to be 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm. Different first gaps can realize different pushing heights of the material handle, improve demolding quality and prolong the service life of the mold.
The molding seat 33 slides on the movable mold seat 12 to form a sliding molding structure. The telescopic power piece 31 drives the forming seat 33 to move, and the position of the forming seat 33 can be limited and positioned. Preferably, the movable die holder 12 is provided with a positioning boss, and the forming seat 33 is in sliding contact with the positioning boss. In one embodiment, the molding seat 33 is formed with a snap boss protruding toward the side of the stationary mold device 20. The clamping boss protrudes out of the die-bonding surface 123 to form a boss structure.
The fixed die device 20 is provided with a clamping groove 21 matched with the clamping boss, the fixed die device 20 is folded to the movable die device 10, and the clamping groove 21 is buckled and locked with the clamping boss. In the mold clamping posture, the fixed mold device 20 limits and positions the molding seat 33, so that the locking force of the telescopic power piece 31 to the molding seat 33 in the molding process is avoided, the power requirement of the telescopic power piece 31 is reduced, and the stability of the locking position of the molding seat 33 is improved. Alternatively, the clamping boss is inclined toward the side of the fixed die device 20, and the clamping groove 21 is matched with the inclined surface to form wedge-shaped fit, so that the pressing effect is good.
In an embodiment, the die casting mold further includes a cooling water path connected to the movable mold base 12, and the cooling water path is distributed in a region between the first deep groove 121 and the second deep groove 122 and symmetrically distributed. The cooling water path is located between the first deep groove 121 and the second deep groove 122 to cool the movable die holder 12 together. Optionally, the cooling water circuit includes a first circuit surrounding the first deep groove 121 and a second circuit surrounding the second deep groove 122. The first loop and the second loop are both in a U-shaped structure and are symmetrically arranged. Preferably, the first circuit includes a central cooling zone of the flat cavity structure and at least one fluid passage connected to the central cooling zone, the fluid passage directing the flow of cooling fluid through the central cooling zone, the central cooling zone being parallel to the large cavity face of the first deep groove 121 to form a face cooling, improving uniformity of cooling.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The die casting die for the special-shaped long thin-wall vehicle aluminum alloy castings comprises a fixed die device, a movable die device movably folded to the fixed die device and two sliding block devices symmetrically arranged on the movable die device, and is characterized in that the movable die device comprises a movable die frame, a movable die holder arranged on the movable die frame, and the movable die holder comprises a first deep groove and a second deep groove which are symmetrically recessed from a die closing surface, and a plurality of slag ladle grooves distributed on the die closing surface;
the first deep groove comprises a deep cavity area, a forming area intersected to the deep cavity area and a slag discharging area recessed from the bottom wall of the forming area, the depth of the forming area is smaller than or equal to the height of the intersection part of the deep cavity area, the slag discharging area is provided with a plurality of slag discharging grooves, and the slag discharging grooves are correspondingly communicated to the slag ladle grooves through diversion runners;
the sliding block device comprises a mounting frame fixed on the movable die device, a telescopic power piece fixed on the mounting frame, a forming seat connected with the telescopic power piece, at least one forming column sliding on the forming seat, and an elastic piece elastically connecting the forming seat and the forming column, wherein the forming seat slides in the forming area, and the forming column stretches out of the forming seat for a preset length under the action of elastic pre-tightening force of the elastic piece;
the molding seat slides along the molding area and abuts against the movable mold seat under the driving of the telescopic power piece, the end face of the molding seat forms a lateral cavity wall of the molding area, and the molding column abuts against the lateral cavity wall of the deep cavity area and compresses for a preset length;
the molding seat covers the notch of the slag discharging groove, the slag discharging groove is communicated with the molding area through a chute, wherein the surrounding space of the fixed mold device, the end surface of the molding seat, the surface of the molding column, the deep cavity area and the molding area forms the molding space of the aluminum alloy casting for the vehicle.
2. The die casting mold according to claim 1, wherein the molding seat is provided with at least one molding boss that extends into the first deep groove, and the molding post extends along the molding boss.
3. The die casting die according to claim 2, wherein the bottom of the molding zone is concavely inclined toward the center direction, and the molding seat is obliquely slidably connected to the bottom of the molding zone.
4. The die casting die of claim 2, wherein the molding post includes a cylindrical portion sliding on the molding base and a molding portion located at an end of the cylindrical portion, the molding portion having a larger cross-sectional dimension than the cylindrical portion, the molding portion being fitted into or beyond the molding boss.
5. The die casting mold according to claim 4, wherein the molding portion includes a molding end and an abutment end protruding from the molding end, a cross-sectional dimension of the molding end being larger than a cross-sectional dimension of the abutment end, the abutment end being for abutting against a lateral cavity wall of the deep cavity region.
6. The die casting die of claim 1, wherein the slag ladle grooves are symmetrically distributed on the die-combining surface, at least two slag ladle grooves are arranged and distributed in the slag discharge area at intervals, and the slag ladle grooves are connected in series through a runner.
7. The die casting die of claim 2, wherein the movable die holder comprises a separation boss protruding from the deep cavity area, the separation boss is provided with a clearance gap, and the forming boss is in plug-in fit with the clearance gap.
8. The die casting die of claim 1, wherein the movable die holder comprises a central runner arranged in the middle and a plurality of branch runners distributed on two sides of the central runner, and the branch runners are respectively communicated with the first deep groove and the second deep groove;
the movable die device further comprises a top plate seat and a thimble assembly sliding on the movable die seat, the thimble assembly comprises a plurality of first-stage thimbles and second-stage thimbles, the first-stage thimbles are aligned to the deep cavity area, the second-stage thimbles are respectively aligned to the slag ladle groove, the slag discharge groove, the central runner and the branch runner, the first-stage thimbles are connected to the top plate seat through springs, a first gap is reserved between the first-stage thimbles and the top plate seat, and the second-stage thimbles are fixed on the top plate seat so that the second-stage thimbles are abutted to the formed aluminum alloy castings in advance of the first-stage thimbles.
9. The die casting mold according to claim 1, wherein the molding seat is formed with a snap boss protruding toward one side of the stationary mold device; the fixed die device is provided with a clamping groove matched with the clamping boss, the fixed die device is folded to the movable die device, and the clamping groove is buckled and locked with the clamping boss.
10. The die casting mold of claim 1, further comprising a cooling water path connected to the movable die holder, the cooling water path being distributed in an area between the first deep groove and the second deep groove and symmetrically distributed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311553879.8A CN117259719B (en) | 2023-11-21 | 2023-11-21 | Die casting die of special-shaped long thin-wall aluminum alloy casting for vehicle |
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| CN202311553879.8A CN117259719B (en) | 2023-11-21 | 2023-11-21 | Die casting die of special-shaped long thin-wall aluminum alloy casting for vehicle |
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