CN116511463B - Casting mold - Google Patents
Casting mold Download PDFInfo
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- CN116511463B CN116511463B CN202310485418.5A CN202310485418A CN116511463B CN 116511463 B CN116511463 B CN 116511463B CN 202310485418 A CN202310485418 A CN 202310485418A CN 116511463 B CN116511463 B CN 116511463B
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- 238000005266 casting Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 135
- 238000001125 extrusion Methods 0.000 claims description 79
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 239000000498 cooling water Substances 0.000 claims description 27
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 25
- 238000005507 spraying Methods 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000006082 mold release agent Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- 239000007787 solid Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 238000010981 drying operation Methods 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
- 238000004904 shortening Methods 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
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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
- B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to the technical field of metal part casting, and discloses a casting mold, which comprises a fixed mold and a movable mold, wherein a cavity is formed between the fixed mold and the movable mold, a core is arranged in the cavity, water leakage grooves are respectively arranged on the fixed mold and the movable mold, and the water leakage grooves are respectively positioned at the bottoms of the fixed mold and the movable mold; the mold further comprises a sliding block, the sliding block is connected between the fixed mold and the movable mold in a sliding mode, a groove is formed in the sliding block and is communicated with the water leakage groove, and therefore the problems that the water removal time of the mold is long and the production efficiency is reduced after the mold release agent is sprayed in the existing mold are solved.
Description
Technical Field
The invention relates to the technical field of metal part casting, in particular to a casting mold.
Background
In the casting mold, liquid metal is injected into a specific cavity in the mold to produce metal parts in batches, and in the process of casting metal parts, in order to ensure that the parts can be smoothly separated from the mold, a layer of release agent is often required to be sprayed on the inner wall of the cavity so as to reduce friction between the mold and the casting. Because the release agent is required to be dissolved in water for use according to a certain proportion, a certain amount of water remains in the cavity after the release agent is sprayed, the existence of the water can influence the effect of the release agent, and the remaining water can influence the integrity of liquid metal molding, the final release generation and other adverse effects.
Because the shape of the die cavity is complex, the existing casting die adopts the preheating treatment to the surface of the die to accelerate the evaporation of water in order to solve the problem that the residual water after spraying affects the casting, and adopts special drying equipment to carry out comprehensive measures such as high-pressure gas spraying on the die after spraying, so that the inner wall of the die cavity is dried as much as possible when the liquid metal is injected, thereby ensuring the forming effect of the part. However, the method of high-pressure gas or heating evaporation is adopted, long drying time is required for removing the water, and the series of measures are complex in operation and reduce the production efficiency of the casting mold.
Disclosure of Invention
The invention aims to provide a casting mold, which solves the problems that the existing mold has long time for removing moisture after spraying a release agent and the production efficiency is reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme: the casting mold comprises a fixed mold and a movable mold, wherein a cavity is formed between the fixed mold and the movable mold, a mold core is arranged in the cavity, water leakage grooves are formed in the fixed mold and the movable mold, and the water leakage grooves are respectively positioned at the bottoms of the fixed mold and the movable mold; the device also comprises a sliding block, wherein the sliding block is connected between the fixed die and the movable die in a sliding way, a groove is formed in the sliding block, and the groove is communicated with the water leakage groove.
The beneficial effect of this scheme is: the part originally fixed at the lower ends of the fixed die and the movable die is changed into a sliding block in sliding connection, a groove is formed in the sliding block, and the groove is communicated with a water leakage groove; when castings are manufactured, the sliding block moves upwards, the original shape of a cavity is not affected, after the mold release is sprayed, the sliding block moves downwards, a water leakage groove is exposed, the mold release aqueous solution on the fixed mold and the movable mold flows downwards under the action, most of the mold release aqueous solution can be rapidly discharged through the water leakage groove, a small part of the mold release aqueous solution can vertically fall down to the top end of the sliding block, the mold release aqueous solution at the top end of the sliding block is gradually converged in the groove, the converged aqueous solution in the groove can be blown away from the bottoms of the mutually communicated water leakage grooves by using an air dryer, namely, the mold release aqueous solvent on the mold is discharged through the convergence of the water leakage groove and the groove, only some water remained on the inner wall of the cavity is left, the water can be rapidly dried by using hot air of the air dryer, no water exists in the cavity, and adverse effects on castings of metal parts are avoided; the time for removing the water after spraying the inner wall of the die is greatly reduced, so that the production efficiency of the die is improved.
Preferably, the water leakage grooves are all in a shape of an inverted right trapezoid, the water leakage grooves are positioned right below the mold core, and the surfaces of the grooves are arc-shaped.
The beneficial effect of this scheme is: 1. the water leakage groove is arranged in an inverted right trapezoid, so that the water leakage area of the water leakage groove is increased, the water drainage speed of the water leakage groove is increased, and meanwhile, the solution is more convenient to gather due to the shape of big top and small bottom;
2. Most of the release agent aqueous solution gradually converges along the two sides of the outer contour of the mold core in the downward flowing process, so that the water leakage groove is arranged right below the mold core, and the release agent aqueous solution can be quickly discharged through the water leakage groove after converging;
3. The surface of the groove is set to be arc-shaped, so that the aqueous solution at the top end of the sliding block can be gathered, the air dryer can blow the aqueous solution in the groove into the water leakage groove, and the arc-shaped surface is convenient to dry.
Preferably, a cavity is arranged in the core, a core rod is embedded in the cavity, and a water inlet channel and a water outlet channel are arranged in the core rod.
The beneficial effect of this scheme is: the core rod is embedded in a cavity in the cavity, a channel for cooling water or hot water to circulate is arranged in the core rod, before spraying of the release agent is carried out, the water inlet channel is communicated with a hot water tank, hot water continuously flows in the core, the temperature of the core is gradually increased, the temperature of the core is increased, the speed of removing residual moisture on the die after spraying can be increased, and therefore the production efficiency of the die is further improved; when castings are manufactured, the water inlet channel is communicated with the cooling water tank, cooling water continuously flows through the core, heat of liquid metal can be continuously taken away, accordingly solidification speed of the liquid metal is accelerated, and production efficiency of casting molds is improved again.
Preferably, the core comprises a fixed section and a forming section, and the forming section is positioned in the cavity; there is the clearance between top and the cavity of plug, and the thread groove has been seted up on the plug surface, and the thread groove is located the shaping section of core, and the top of water inlet channel intercommunication plug, water outlet channel intercommunication thread groove.
The beneficial effect of this scheme is: through addding the screw groove, realize that the water of core shaping section is unidirectional, spiral flow, such flow mode is compared with circulation flow, and heat conduction or endothermic efficiency can both be higher.
Preferably, the device further comprises a local extrusion unit, wherein the local extrusion unit comprises an extrusion pin, the movable die is provided with an extrusion hole, and the extrusion pin slides in the extrusion hole.
The beneficial effect of this scheme is: the local extrusion unit is additionally arranged, and extrusion and exhaust are carried out on the wall thickness when the liquid metal is cooled to be semi-solid, so that the density of metal parts can be enhanced, and the quality of finished products can be improved.
Preferably, one end of the extrusion pin is connected with a power piece, the extrusion pin comprises an extrusion section and a connecting section, the cross section of the extrusion section is smaller than that of the connecting section, and a conical transition section is arranged between the extrusion section and the connecting section.
The beneficial effect of this scheme is: the conical transition section can effectively reduce the condition of breakage of the extrusion pin caused by stress concentration, and prolong the service life of the extrusion pin.
Preferably, the device further comprises a connecting disc, wherein the connecting disc is connected with the power piece, a plurality of extrusion pins are arranged on the connecting disc, and the interval distances between the extrusion pins are the same.
The beneficial effect of this scheme is: a plurality of extrusion pins are uniformly distributed on the connecting disc, so that the extrusion efficiency of the partial extrusion unit on the semi-solid metal wall thickness part can be improved, the extrusion area can be uniformly increased, the extrusion uniformity is improved, the density of the metal part wall thickness part is uniformly increased, and the output quality of the metal part is further improved.
Preferably, the heat exchange device further comprises a heat exchange unit, wherein the heat exchange unit comprises a plurality of arc-shaped cavities, and each arc-shaped cavity is communicated with a water inlet and a water outlet.
The beneficial effect of this scheme is: firstly, cooling water flows in an arc-shaped cavity of a heat exchange unit to enable the arc-shaped cavity to be a cooling cavity, after liquid metal is injected into the cavity, the cooling water continuously flows in the arc-shaped cavity to quickly absorb heat of the liquid metal in the cavity, so that the cooling speed of the liquid metal is increased, and the production efficiency of a die is further improved;
Secondly, when hot water passes into the arc-shaped cavity, the arc-shaped cavity is a heating cavity; when the mold is subjected to release agent spraying operation, hot water is introduced into the arc-shaped cavity, the hot water continuously flows through the temperature of the surface of the fixed mold, after the spraying is finished, the temperature of the surface of the fixed mold can be increased, the evaporation of water remained on the inner wall of the cavity can be further accelerated, the drying time of the mold cavity after the spraying is shortened, and the effect of improving the production efficiency of the mold is further achieved.
And, set up a plurality of arc chambeies, can reduce cooling water or hot water and flow rate in the arc chamber to improve heat exchange efficiency.
Preferably, a baffle is arranged in the arc-shaped cavity, and a gap is formed between the baffle and the bottom of the arc-shaped cavity.
The beneficial effect of this scheme is: under the effect of baffle, the cooling water gets into arc chamber re-discharge's route from the inlet opening and is the U type, and the flow path of U type ensures that inlet water and play water are all in same side to it is more convenient to make mould water supply, drainage connect.
Drawings
FIG. 1 is a schematic view of a mold according to embodiment 1 of the present invention;
FIG. 2 is a three-dimensional view showing a state of the slider moving upward according to embodiment 1 of the present invention;
FIG. 3 is a three-dimensional view showing a state in which a slider is moved down in accordance with embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view of a mandrel according to example 1 of the present invention;
FIG. 5 is a three-dimensional view of a mandrel according to example 1 of the present invention;
FIG. 6 is a front view of a partial pressing unit according to embodiment 2 of the present invention;
fig. 7 is a three-dimensional view of a heat exchange unit according to embodiment 3 of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
Reference numerals in the drawings of the specification include: the mold comprises a fixed mold 1, a water leakage groove 11, a mold cavity 12, a convex block 121, a sliding block 2, a groove 21, a mold core 3, a fixed section 31, a molding section 32, a cavity 33, a core rod 34, a water inlet channel 341, a water outlet channel 342, a thread groove 343, a spiral runner 344, a sealing groove 345, a movable mold 4, an extrusion hole 41, an extrusion pin 5, an extrusion section 51, a connecting section 52, a conical transition section 53, a cylinder 54, an arc-shaped cavity 6, a baffle 61, a sealing cover 62, a water inlet hole 621 and a water outlet hole 622.
Example 1
Embodiment 1 is basically shown in fig. 1-5, and a casting mold shown in fig. 1 includes a fixed mold 1, a movable mold 4, a slide rail, a frame and a hydraulic power system, which are not shown in the drawing for convenience of illustration. The fixed die 1 is vertically and fixedly connected to the frame through screws, the sliding rail is horizontally welded and fixed to the frame, the movable die 4 is slidably connected to the sliding rail, the hydraulic power system can control the brake die 4 to circularly reciprocate on the sliding rail, so that the movable die 4 is intermittently attached to or separated from the fixed die 1, a cavity 12 and an injection port are formed between the movable die 4 and the fixed die 1 when the fixed die 1 is attached to the movable die 4, liquid metal can be injected into the cavity 12 through the injection port, after the liquid metal is cooled and molded in the cavity 12, the movable die 4 is separated from the fixed die 1, and casting of a part can be completed through demolding operation; meanwhile, according to the different requirements of the shapes of different metal parts, a plurality of cores 3 are arranged in the cavity 12.
The fixed mold 1 and the movable mold 4 are provided with water leakage grooves 11, and the water leakage grooves 11 are respectively positioned at the bottoms of the fixed mold 1 and the movable mold 4, in this embodiment, the water drainage grooves on the fixed mold 1 are taken as an example for explanation; as shown in fig. 2, two cores 3 are fixed on the fixed mold 1 through threads, two water leakage grooves 11 are formed, the two water leakage grooves 11 are respectively located under the two cores 3, the water leakage grooves 11 are all in a shape of a right trapezoid, and the bottoms of the water leakage grooves 11 are hollow. Meanwhile, the novel mold further comprises a sliding block 2, the sliding block 2 is in sliding connection with the fixed mold 1, the sliding block 2 replaces a part of a protrusion of the lower end of the original fixed mold 1, which is necessary for forming the cavity 12, and the sliding connection mode of the specific sliding block 2 is as follows: the original bulge at the bottom end of the fixed die 1 is divided into two convex blocks 121 positioned at two sides of the bottom end, the upper end of the sliding block 2 is embedded in the two convex blocks 121, the bottom of the sliding block 2 is connected with a hydraulic cylinder, and the sliding block 2 can be driven to slide up and down by starting the hydraulic cylinder. The top of the slide block 2 is provided with two arc-shaped grooves 21, the arc-shaped grooves 21 can be just fit with the lower ends of the two cores 3 respectively, the casting process is shown in fig. 2 and 3, the slide block 2 moves upwards from the state of fig. 3 to the state of fig. 2, and the slide block 2, the fixed die 1 and the movable die 4 are assembled together to form a complete cavity 12; since the liquid metal is in contact with only the inner walls of the fixed mold 1 and the slide 2 constituting the cavity 12, when the mold is sprayed with the release agent, the slide 2 is kept in an upward moving state, the groove 21 is attached to the lower end of the core 3, the release agent is diluted in water to form an aqueous solution of the release agent, and the aqueous solution of the release agent is uniformly sprayed on the fixed mold 1 and the slide 2 by means of a spraying tool.
After spraying, the hydraulic cylinder drives the sliding block 2 to move downwards, as shown in fig. 3, until the bottom of the arc-shaped groove 21 is flush with the bottom of the water leakage groove 11, at the moment, the excessive release agent water solution flows downwards under the action of gravity, wherein most of the release agent water solution gradually converges along the two sides of the outer contour of the core 3 in the downwards flowing process and then flows into the water leakage groove 11 and then flows out of the water leakage groove 11, and because the water leakage groove 11 is arranged in a trapezoid shape, the water leakage area of the water leakage groove 11 is increased to accelerate the water drainage speed, and meanwhile, the shape with big top and small bottom is more convenient for the convergence of the solution; and a small part of release agent aqueous solution can fall to the top of the sliding block 2 and is converged in the arc-shaped groove 21, at the moment, the solution converged in the arc-shaped groove 21 is integrally blown to the water leakage groove 11 through the air dryer and flows out of the water leakage groove 11, at the moment, most of the solution reserved in the die is discharged, and finally, the residual moisture on the top of the die and the fixed die 1 is dried by hot air. The combination of the outer contours of the mold core 3, the combination of the water leakage grooves 11 and the combination of the arc-shaped grooves 21 can realize the rapid discharge of the aqueous solution of the release agent out of the mold, thereby greatly shortening the air drying time after the spraying of the release agent and improving the working efficiency.
As shown in fig. 4, the core 3 includes a fixing section 31 and a molding section 32, the fixing section 31 being screwed in the stationary mold 1 for fixing the core 3 to the stationary mold 1; the molding section 32 is positioned within the cavity 12 to define the shape of the molded metal part. A cavity 33 is formed in the core 3, and the cavity 33 extends and is communicated to the outside of the forming section 32; as shown in fig. 5, the cavity 33 is embedded with a core rod 34, the left end of the core rod 34 is provided with two annular sealing grooves 345, and sealing rings are adhered in the sealing grooves 345, and fix the core rod 34 in the cavity 33. A gap is formed between the top of the core rod 34 and the cavity 33, a water inlet channel 341 and a water outlet channel 342 are formed in the core rod 34, a thread groove 343 is formed on the surface of the core rod 34, the thread groove 343 is positioned at the forming section 32 of the core 3, and a spiral flow channel 344 is formed between the thread groove 343 and the inner wall of the cavity 33; the water inlet channel 341 is communicated with the top of the core rod 34, the water outlet channel 342 is communicated with the thread groove 343, and the overall water flow direction of the core rod 34 is as follows: the water flows rightward into the gap between the top of the core rod 34 and the cavity 33 through the water inlet channel 341, flows through the thread groove 343, then enters the water outlet channel 342, and finally is discharged from the water outlet channel 342, namely, the water flows unidirectionally in the forming section 32 of the core 3 and is only discharged spirally leftwards. Before spraying the release agent, the water outlet channel 342 is communicated with a hot water tank, hot water continuously flows out leftwards from the right end inside the core 3, the temperature of the forming section 32 is gradually increased, and the temperature of the core 3 is increased, so that the speed of removing residual moisture on the die after spraying can be increased, and the production efficiency of the die is further improved. When the casting mold is filled with liquid metal, the water inlet channel 341 is communicated with a cooling water tank, cooling water continuously and unidirectionally flows out in a spiral circulation manner in the forming section 32 of the core 3, so that heat of the liquid metal is continuously taken away, the solidification speed of the liquid metal is accelerated, the production efficiency of the casting mold is improved again, the cooling water flows in a unidirectional circulation manner, and the cooling water is rapidly discharged from the water outlet channel 342 after absorbing heat, so that the heat absorbing effect of the forming section 32 of the core 3 is better; and, the hot water is injected from the water outlet channel 342 and flows out from the water inlet channel 341 in the core 3, so that the temperature of the upper end of the core 3 is higher than that of the lower end of the core 3, and at this time, the cooling water is injected from the water inlet channel 341 at the lower end and flows out from the water outlet channel 342 at the upper end, thereby reducing the condition that the temperature of the cooling water is excessively raised before entering the cavity 33, and further ensuring the cooling effect.
The specific implementation process is as follows: before casting, the fixed die 1 and the movable die 4 are kept to be separated, the sliding block 2 moves upwards, the water inlet channel 341 of the core rod 34 is communicated with a hot water tank, hot water continuously flows in the forming section 32 in a one-way spiral mode, the temperature of the core 3 is increased, and then the inner wall of the die forming the cavity 12 is sprayed with a release agent through a spraying tool.
After spraying, the hydraulic cylinder drives the sliding block 2 to move downwards to expose the water leakage groove 11, at the moment, a certain amount of release agent aqueous solution in the mould flows downwards under the action of gravity, and most of release agent aqueous solution gradually converges into the water leakage groove 11 along the outline of the core 3 in the flowing process and is rapidly discharged from the bottom of the water leakage groove 11; the small part of the release agent aqueous solution can vertically fall down on the top end of the sliding block 2, the release agent aqueous solution on the top end of the sliding block 2 gradually gathers in the arc-shaped groove 21, the gathered aqueous solution can be blown away from the bottom of the water leakage groove 11 by utilizing an air dryer, at the moment, the release agent aqueous solution on the die is all drained away, only some moisture remained on the inner wall of the die cavity 12 is remained, at the moment, the drying operation in the die cavity 12 can be rapidly completed by utilizing the hot air of the air dryer and the heat of the forming section 32 of the core 3, the absence of moisture in the die cavity 12 is ensured, and adverse effects on castings of metal parts are avoided.
When the casting starts, the hydraulic power system drives the movable die 4 to slide and be attached to the fixed die 1; meanwhile, the water inlet channel of the core rod 34 is replaced by being communicated with a cooling water tank, and cooling water continuously flows through the forming section 32 of the core 3 in a unidirectional spiral manner, so that heat of the core 3 is continuously taken away; and then injecting liquid metal into the cavity 12 through the injection port, and accelerating cooling and solidification of the liquid metal under the flow of cooling water in the core 3 until the metal reaches the demoulding standard in the cavity 12, and demoulding after the movable mould 4 is driven to be far away from the fixed mould 1 again by the hydraulic power system, so that the casting is finished.
Example 2
A casting mold as shown in fig. 6, which is different from example 1: a local extrusion unit is also included. After the liquid metal is cooled in the place where the core 3 is not arranged in the cavity 12, a part wall thickness position of the metal part is formed, and bubbles and shrinkage porosity exist in the part wall thickness position, so that a local extrusion mode is needed, and extrusion and exhaust are carried out on the part wall thickness position when the liquid metal is cooled to be semi-solid so as to enhance the density of the metal part.
The local extrusion unit comprises a connecting disc, a plurality of extrusion pins 5 and an air cylinder 54, wherein the air cylinder 54 is fixed on the frame through bolts, the connecting disc is fixed on an output shaft of the air cylinder 54 through threads, and the extrusion pins 5 are uniformly distributed and fixed on the connecting disc through threads; the extrusion pins 5 are uniformly distributed on the connecting disc, so that the extrusion efficiency of the partial extrusion unit on the semi-solid metal wall thickness part can be improved, the extrusion area can be uniformly increased, the extrusion uniformity is improved, the density of the metal part wall thickness part is uniformly increased, and the output quality of the metal part is further improved. The section of the extrusion pin 5 for extruding the semi-solid metal is an extrusion section 51, the section of the extrusion pin 5 connected with the connecting disc is a connecting section 52, and the end part of the extrusion section 51 is arc-shaped, so that the damage to the semi-solid metal surface during extrusion is avoided; the cross section area of the extrusion section 51 of the extrusion pin 5 is smaller than that of the connecting section 52, and a conical transition section 53 is arranged between the extrusion section 51 and the connecting section 52, so that the situation that the extrusion pin 5 is broken due to stress concentration can be effectively reduced by the conical transition section 53, and the service life of the extrusion pin 5 is prolonged.
As shown in fig. 1, a plurality of extrusion holes 41 are formed in the movable die 4, and the extrusion holes 41 are aligned with the extrusion pins 5 on the connecting disc one by one respectively; a sealing tube is embedded in the extrusion hole 41, when the liquid metal is cooled to be semi-solid, the hydraulic power system pulls out the sealing tube, and at the moment, the air cylinder 54 can drive the connecting disc to drive the extrusion pin 5 to continuously pass through the extrusion hole 41 to locally extrude the semi-solid metal; meanwhile, the extrusion holes 41 are internally provided with protective sleeves in an interference fit manner, the protective sleeves are made of rubber, the diameter of the inner walls of the protective sleeves is the same as that of the extrusion sections 51 of the extrusion pins 5, and the sealing pipes are embedded in the protective sleeves; the protective sleeve is additionally arranged, so that the extrusion pin 5 is prevented from being in direct contact with the extrusion hole 41 of the movable die 4, the abrasion degree of the extrusion pin 5 is reduced, and the service life of the extrusion pin 5 is further prolonged. The protective sheath needs to be replaced periodically to avoid solidification of a small amount of semi-solid metal after being brought into the protective sheath by the extrusion pin 5 during extrusion, and to hinder the reciprocating movement of the extrusion pin 5 in the protective sheath.
The specific implementation process is as follows: when the liquid metal is cooled to be semi-solid in the casting process, the hydraulic power system pulls out all the sealing pipes in the extrusion holes 41, then the air cylinder 54 is started, the air cylinder 54 drives the connecting disc to drive the extrusion pins 5 to continuously pass through the protective sleeves in the extrusion holes 41, the semi-solid metal is locally extruded, the gas at the wall thickness is discharged, the density is increased, and the quality of metal parts is improved; after extrusion is completed, the semi-solid metal is continuously cooled in the cavity 12 until the demoulding standard is reached, the movable mould 4 is driven by the hydraulic power system to slide rightwards to leave the fixed mould 1, and the movable mould 4 is separated to perform demoulding operation of the metal part.
Example 3
A casting mold as shown in fig. 7, which is different from example 1: also comprises a heat exchange unit. The heat exchange unit comprises a plurality of arc-shaped cavities 6 and a closed cover 62, wherein a baffle 61 is arranged in each arc-shaped cavity 6, in the embodiment, three arc-shaped cavities 6 are arranged, and the three arc-shaped cavities 6 are spliced into a circular cavity;
The sealing cover 62 is circular, and the circular sealing cover 62 can just seal and cover the three arc-shaped cavities 6 at the same time; a baffle plate 61 is fixedly welded in each arc-shaped cavity 6, one end of the fixed back baffle plate 61 is tightly attached to the airtight cover 62, and a gap is formed between the other end of the fixed back baffle plate and the bottom of the arc-shaped cavity 6, and water is supplied through the gap; the airtight cover 62 is provided with three water inlets 621 and three water outlets 622, the water inlets 621 and the water outlets 622 are respectively positioned at two ends of the three arc-shaped cavities 6, under the action of the baffle 61, cooling water enters the arc-shaped cavities 6 from the water inlets 621 and then is discharged, the U-shaped flow paths ensure that the water inlets and the water outlets are on the same side, so that water supply and water discharge connection of the die are more convenient, the three arc-shaped cavities 6 are arranged, the flow paths of the cooling water in a single cavity are shorter, the cooling water is immediately discharged after contacting with the heat inside the cavity 12 at the bottom of the arc-shaped cavities 6, in the process of injecting the cooling water, the cooling water flows upwards from the water outlets 622 after absorbing the heat inside the cavity 12 from the water inlets 621 downwards through gaps, the lower temperature of the cooling water in each arc-shaped cavity 6 is guaranteed to be the lowest when the cooling water is close to the cavity 12, the lower temperature of the absorbed heat is more, and the cooling water flows out immediately after absorbing the heat, so that the cooling effect of the heat exchange unit can be improved.
In the casting process, after the liquid metal is injected into the cavity 12, cooling water is immediately introduced into the three arc-shaped cavities 6, and the cooling water continuously flows in the arc-shaped cavities 6 to quickly absorb the heat of the liquid metal in the cavity 12, so that the cooling speed of the liquid metal is increased, and the production efficiency of the die is further improved. In addition, before the casting starts, when the mold is subjected to release agent spraying operation, hot water is introduced into the arc-shaped cavity 6, and the hot water continuously flows through the cavity to raise the temperature of the surface of the fixed mold 1; after the spraying is finished, the temperature of the surface of the fixed die 1 is increased, so that the evaporation of the water remained on the inner wall of the cavity 12 can be further accelerated, the drying time of the cavity 12 after the spraying is shortened, and the effect of improving the production efficiency of the die is further achieved.
The foregoing is merely exemplary of the present application, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, and these should also be regarded as the protection scope of the present application, which does not affect the effect of the implementation of the present application and the practical applicability of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (6)
1. The utility model provides a foundry goods mould, includes cover half and movable mould, is formed with the die cavity between cover half and the movable mould, is equipped with core, its characterized in that in the die cavity: the fixed die and the movable die are respectively provided with a water leakage groove, and the water leakage grooves are respectively positioned at the bottoms of the fixed die and the movable die; the device also comprises a sliding block, wherein the sliding block is connected between the fixed die and the movable die in a sliding way, a groove is formed in the sliding block, and the groove is communicated with the water leakage groove;
The water leakage grooves are all in an inverted right trapezoid shape, the water leakage grooves are positioned right below the mold core, and the surfaces of the grooves are arc-shaped; the core is internally provided with a cavity, a core rod is embedded in the cavity, and a water inlet channel and a water outlet channel are arranged in the core rod; the mold core comprises a fixed section and a molding section, and the molding section is positioned in the cavity; a gap exists between the top end of the core rod and the cavity, a thread groove is formed in the surface of the core rod, the thread groove is positioned at the forming section of the core, the water inlet channel is communicated with the top of the core rod, and the water outlet channel is communicated with the thread groove; before spraying the release agent, the water outlet channel is communicated with a hot water tank, and when the casting mould is filled with liquid metal, the water inlet channel is communicated with a cooling water tank.
2. A casting mold according to claim 1, wherein: the device also comprises a local extrusion unit, wherein the local extrusion unit comprises an extrusion pin, an extrusion hole is formed in the movable die, and the extrusion pin slides in the extrusion hole.
3. A casting mold according to claim 2, wherein: one end of the extrusion pin is connected with a power piece, the extrusion pin comprises an extrusion section and a connecting section, the cross section of the extrusion section is smaller than that of the connecting section, and a conical transition section is arranged between the extrusion section and the connecting section.
4. A casting mold according to claim 3, wherein: the device also comprises a connecting disc, wherein the connecting disc is connected with the power piece, a plurality of extrusion pins are arranged on the connecting disc, and the interval distances between the extrusion pins are the same.
5. A casting mold according to claim 1, wherein: the heat exchange unit comprises a plurality of arc-shaped cavities, and each arc-shaped cavity is communicated with a water inlet and a water outlet.
6. A casting mold according to claim 5, wherein: a baffle is arranged in the arc-shaped cavity, and a gap is formed between the baffle and the bottom of the arc-shaped cavity.
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| CN202310485418.5A CN116511463B (en) | 2023-04-28 | 2023-04-28 | Casting mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310485418.5A CN116511463B (en) | 2023-04-28 | 2023-04-28 | Casting mold |
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| CN116511463B true CN116511463B (en) | 2024-04-16 |
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| CN211840086U (en) * | 2019-12-30 | 2020-11-03 | 有研工程技术研究院有限公司 | Semi-solid die-casting die for middle plate of mobile phone |
| CN113333712A (en) * | 2021-06-17 | 2021-09-03 | 任庆富 | Long service life's die casting die |
| CN113458357A (en) * | 2021-06-25 | 2021-10-01 | 广东鸿图科技股份有限公司 | Ground side slider structure with drainage function |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05318081A (en) * | 1992-05-22 | 1993-12-03 | Olympus Optical Co Ltd | Pressure casting mold for molten metal |
| CN108405824A (en) * | 2018-04-20 | 2018-08-17 | 广东鸿图科技股份有限公司 | A kind of die casting squeeze pin special construction |
| CN208680480U (en) * | 2018-07-31 | 2019-04-02 | 旭东压铸（上海）有限公司 | A kind of die casting mould pouring hend structure applied to the casting for having bulge-structure |
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| CN113458357A (en) * | 2021-06-25 | 2021-10-01 | 广东鸿图科技股份有限公司 | Ground side slider structure with drainage function |
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| CN116511463A (en) | 2023-08-01 |
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