CN111318664A - Extrusion device and casting die - Google Patents
Extrusion device and casting die Download PDFInfo
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- CN111318664A CN111318664A CN202010346749.7A CN202010346749A CN111318664A CN 111318664 A CN111318664 A CN 111318664A CN 202010346749 A CN202010346749 A CN 202010346749A CN 111318664 A CN111318664 A CN 111318664A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 71
- 238000005266 casting Methods 0.000 title claims abstract description 66
- 239000010720 hydraulic oil Substances 0.000 claims description 57
- 238000003825 pressing Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005121 nitriding Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 4
- 208000032765 Device extrusion Diseases 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 38
- 238000000034 method Methods 0.000 description 13
- 230000007547 defect Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000951 Aluminide Inorganic materials 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- B22D17/2015—Means for forcing the molten metal into the die
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model relates to a casting mould technical field provides an extrusion device and casting mould, the extrusion device includes hydraulic cylinder, first push pedal, first fixed plate, ejector pin, each ejector pin and one the cooperation of ejector pin cover, the ejector pin stretches into the ejector pin cover, and the ejector pin can extrude the foundry goods, and it is bad to eliminate the shrinkage porosity through extrusion device extrusion aluminium alloy foundry goods in casting process, improves the quality of product, simultaneously, utilizes the ejecting foundry goods of extrusion device after the mould die sinking, adopts extrusion and ejecting integrated configuration, can effectively utilize the mould finite space.
Description
Technical Field
The application relates to the technical field of casting molds, in particular to an extrusion device and a casting mold.
Background
High-pressure casting is a method in which molten metal or semi-solid alloy is injected into a closed die cavity through a punch, and high pressure is applied to solidify and form the alloy, thereby obtaining a casting. When a casting is produced by the mold, the casting needs to be taken out of the mold after the metal is solidified, the casting is ejected out by using an ejector rod and separated from a pouring system after the mold is opened, and the conventional ejector rod only plays an ejecting role on the casting. In order to eliminate the defect of shrinkage porosity of the casting, a cooling water channel is usually added in a casting mold to accelerate the cooling of the corresponding position of the casting so as to reduce the defect of shrinkage porosity, but the defect of shrinkage porosity of the casting cannot be effectively improved after the cooling water channel is added through field use verification, and the quality defect of the casting is easy to occur.
Disclosure of Invention
The embodiment of the application provides an extrusion device and casting mould, solves the inside shrinkage porosity of foundry goods bad, avoids product defect, utilizes the mould finite space simultaneously, plays the effect of ejecting again after the extrusion, realizes that two kinds of technologies of production process combine together, effectively utilizes the mould finite space.
In order to achieve the purpose, the invention provides the following technical scheme:
the extrusion device comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down.
In some embodiments, guide pillars are fixedly arranged at four corners of the first fixing plate, the guide pillars are hollow, and the top rod penetrates through the guide pillars; the guide sleeve is sleeved on the guide pillar, the guide pillar is matched with the guide sleeve, the guide sleeve is fixed, and the guide pillar can move up and down in the guide sleeve under the pushing of the first push plate.
In some embodiments, the other end of the hydraulic oil cylinder corresponding to the output end is fixed on a second push plate, and the second push plate can push the extrusion device to move up and down under the action of external thrust.
In a second aspect, an embodiment of the application provides a casting mold, which includes a movable mold frame, a movable lining mold, a fixed mold frame, and a fixed lining mold, wherein the fixed mold frame and the fixed lining mold are fixedly arranged, the movable mold frame and the fixed mold frame can close and fix the movable lining mold and the fixed lining mold, and the movable lining mold and the fixed lining mold can close to form a mold cavity; the extrusion device comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down; the ejector rod sleeve is arranged in a hollow mode and communicated with the die cavity, each ejector rod is matched with one ejector rod sleeve, the ejector rods extend into the ejector rod sleeves, and the ejector rods can extrude castings.
In some embodiments, the other end of the hydraulic oil cylinder corresponding to the output end is fixed on a second push plate, and the second push plate can push the extrusion device to move up and down under the action of external thrust.
In some embodiments, the surface of the ejector pin is prepared with a titanium aluminum nitride coating; and nitriding the inner surface of the ejector rod sleeve.
In some embodiments, a first through hole is formed in the movable lining die, a second through hole is correspondingly formed in the movable die frame, the ejector rod sleeve is installed in the first through hole, a hollow ejector rod is installed in the second through hole, and the ejector rod penetrates through the ejector rod sleeve and the ejector rod sleeve.
In some embodiments, guide pillars are fixedly arranged at four corners of the first fixing plate, the guide pillars are hollow, and four top rods respectively penetrate through the guide pillars; the guide post is sleeved on the guide post, the guide post is matched with the guide sleeve, the guide sleeve is fixed in the movable die frame, the pressing plate is fixed on the movable die frame and tightly presses the guide sleeve, and the guide post can move up and down in the guide sleeve under the pushing of the first pushing plate.
In some embodiments, a rectangular concave cavity is formed in the movable mold frame, and the pressing plate is fixed in the rectangular concave cavity.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an extrusion device and a casting die, wherein the extrusion device comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and ejector rods, each ejector rod is matched with one ejector rod sleeve, the ejector rods extend into the ejector rod sleeves, the ejector rods can extrude castings, aluminum alloy castings are extruded by the extrusion device in the casting process to eliminate shrinkage porosity defects, the quality of products is improved, meanwhile, the castings are ejected by the extrusion device after the die of the die is opened, and the limited space of the die can be effectively utilized by adopting an extrusion and ejection combined structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an extrusion apparatus according to the present application.
Fig. 2 is a schematic structural diagram of an extrusion apparatus according to the present application.
Fig. 3 is a main structural schematic diagram of a casting mold according to the present application.
Fig. 4 is a partially enlarged view of a portion a of a casting mold according to the present application.
Fig. 5 is a schematic view of the extrusion state of a casting die of the present application.
Fig. 6 is a partially enlarged view of a portion B in a compressed state of a casting die according to the present invention.
Fig. 7 is a schematic view of an ejection demolding state of the casting mold of the present application.
Wherein: 1-hydraulic cylinder, 2-first push plate, 3-first fixed plate, 4-ejector rod, 5-press plate, 6-guide sleeve, 7-guide pillar, 8-oil pipe, 9-oil cylinder joint, 10-second fixed plate, 11-second push plate, 12-movable mould frame, 13-movable lining mould, 14-ejector rod sleeve, 15-ejector column, 16-rectangular recessed cavity and 17-casting.
Detailed Description
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to solve the problems that the interior of a casting is not well shrunk and product defects are easily caused, and the space between a movable mold frame and a push plate of a mold is small and the space layout is difficult, an embodiment of the application provides an extrusion device which comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down. The ejector rod of the extrusion device in the embodiment can extrude a casting in the casting process under the action of the hydraulic oil cylinder, so that the problem of poor shrinkage and looseness inside the casting is solved, the product defect is avoided, the mold can be ejected out after extrusion, the combination of the two processes of extrusion and ejection is realized, and the limited space of the mold can be effectively utilized.
In order to ensure that the movement of the push plate, the ejector rod and the first fixing plate pushed by the hydraulic oil cylinder is linear up-and-down movement, in some embodiments, guide pillars are fixedly arranged at four corners of the first fixing plate, the guide pillars are hollow, and the ejector rod penetrates through the guide pillars; the guide sleeve is sleeved on the guide pillar, the guide pillar is matched with the guide sleeve, the guide sleeve is fixed, and the guide pillar can move up and down in the guide sleeve under the pushing of the first push plate.
In order to apply external force to the squeezing device and ensure the squeezing or ejecting force, in some embodiments, the other end corresponding to the output end of the hydraulic oil cylinder is fixed on a second pushing plate, and the second pushing plate can push the squeezing device to move up and down under the action of external pushing force.
The other embodiment of the application provides a casting mold, which comprises a movable mold frame, a movable lining mold, a fixed mold frame and a fixed lining mold, wherein the fixed mold frame and the fixed lining mold are fixedly arranged, the movable mold frame and the fixed mold frame can be closed and fixed with the movable lining mold and the fixed lining mold, and the movable lining mold and the fixed lining mold can be closed to form a mold cavity; the extrusion device comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down; the ejector rod sleeve is arranged in a hollow mode and communicated with the die cavity, each ejector rod is matched with one ejector rod sleeve, the ejector rods extend into the ejector rod sleeves, and the ejector rods can extrude castings. The casting mould in the embodiment adopts the design that the extrusion device is matched with the ejector rod sleeve, the poor shrinkage porosity is eliminated by extruding the aluminum alloy casting through the extrusion device in the casting process, the quality of a product is improved, meanwhile, the casting is ejected out by the extrusion device after the mould is opened, and the limited space of the mould can be effectively utilized by adopting an extrusion and ejection combined structure.
In order to ensure the extrusion or ejection force and ensure the extrusion or ejection effect, in some embodiments, the other end corresponding to the output end of the hydraulic oil cylinder is fixed on a second push plate, and the second push plate can push the extrusion device to move up and down under the action of external thrust.
Because the ejector pin and the ejector pin sleeve are in contact with molten metal, in order to enhance the surface strength and improve the heat resistance and the wear resistance, in some embodiments, the surface of the ejector pin is prepared with a titanium aluminum nitride coating; and nitriding the inner surface of the ejector rod sleeve.
On one hand, a path through which a mandril passes is provided, and on the other hand, in order to facilitate the disassembly of the movable die frame and the movable lining die, a mandril sleeve and a hollow mandril are arranged, in some embodiments, a first through hole is formed in the movable lining die, a second through hole is correspondingly formed in the movable die frame, the mandril sleeve is installed in the first through hole, the hollow mandril is installed in the second through hole, and the mandril passes through the mandril and the mandril sleeve.
In order to ensure that the extrusion or ejection is vertical linear motion and does not damage the die due to inclination, in some embodiments, guide pillars are fixedly arranged at four corners of the first fixing plate, the guide pillars are hollow, and four ejector rods respectively penetrate through the guide pillars; the guide post is sleeved on the guide post, the guide post is matched with the guide sleeve, the guide sleeve is fixed in the movable die frame, the pressing plate is fixed on the movable die frame and tightly presses the guide sleeve, and the guide post can move up and down in the guide sleeve under the pushing of the first pushing plate.
In order to effectively utilize the space of the mold and occupy smaller space as much as possible, in some embodiments, a rectangular concave cavity is formed in the movable mold frame, and the pressing plate is fixed in the rectangular concave cavity.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1:
referring to fig. 1-2 of the specification, embodiment 1 provides an extrusion device, which includes a hydraulic cylinder 1, a first push plate 2, a first fixing plate 3, a top rod 4, a pressing plate 5, a guide sleeve 6, a guide pillar 7, an oil pipe 8, an oil cylinder joint 9, and a second push plate 11. The hydraulic oil cylinder 1 is common equipment in the market, and a pair of oil inlet and outlet cylinder joints 9 connected with an oil pipe 8 are arranged on the side surface of the hydraulic oil cylinder 1. The hydraulic pump is communicated with an oil inlet cylinder joint 9 through an oil pipe 8, and a safety valve is generally arranged on the oil pipe 8 between the hydraulic pump and the cylinder joint 9. The oil outlet cylinder joint 9 is communicated with the hydraulic oil tank through an oil pipe 8, and a filter is generally arranged on the oil pipe 8 between the oil outlet cylinder joint 9 and the hydraulic oil tank and used for filtering impurities in hydraulic oil. The hydraulic oil tank is communicated with the hydraulic pump through an oil pipe 8, so that a complete hydraulic oil cylinder 1 driving loop is formed.
The output end of the hydraulic oil cylinder 1 is fixed on the bottom surface of the first push plate 2, the top surface of the first push plate 2 is fixedly connected with the first fixing plate 3, and the ejector rod 4 is fixed on the first fixing plate 3. The hydraulic oil cylinder 1 can push the first push plate to move up and down. In the present embodiment, as shown in fig. 2, one hydraulic cylinder 1 and 6 push rods 4 for pressing are used, and in other embodiments, the number of cylinders and the number of pressing push rods can be changed as required, and the principle is not changed.
The other end of the hydraulic oil cylinder 1 corresponding to the output end is fixed on a second push plate 11, and the second push plate 11 can push the extrusion device to move up and down under the action of external thrust.
The ejector rod of the extrusion device in the embodiment utilizes the first push plate 2 and the first fixing plate 3 to drive the ejector rod 4 to move to complete extrusion under the action of the hydraulic oil cylinder 1, the extrusion device is a single power device, so that the initial time of extrusion (for example, the extrusion is started after 1 second or 1.5 seconds after a casting is filled) can be adjusted, and the optimal process can be adjusted according to the state of the casting.
In other embodiments, the hydraulic oil cylinder 1 is a pressure-resistant oil cylinder which can resist high pressure and can provide stronger extrusion force.
In other embodiments, the second fixing plate 10 is fixed on the second push plate 11, and a common ejector rod is fixedly installed on the second fixing plate 10, and the common ejector rod and the 6 ejector rods 4 are matched to eject the casting together.
Example 2:
in embodiment 2, there is provided a casting mold, as shown in fig. 3 to 7, including a movable mold frame 12, a movable lining mold 13, a fixed mold frame, and a fixed lining mold. The fixed die frame and the fixed lining die are fixedly arranged and are not shown in the drawing. The movable mold frame 12 and the fixed mold frame can close and fix the movable lining mold 13 and the fixed lining mold, and the movable lining mold 13 and the fixed lining mold can close to form a mold cavity. The hydraulic oil cylinder 1 is common equipment in the market, and a pair of oil inlet and outlet cylinder joints 9 connected with an oil pipe 8 are arranged on the side surface of the hydraulic oil cylinder 1. The hydraulic pump is communicated with an oil inlet cylinder joint 9 through an oil pipe 8, and a safety valve is generally arranged on the oil pipe 8 between the hydraulic pump and the cylinder joint 9. The oil outlet cylinder joint 9 is communicated with the hydraulic oil tank through an oil pipe 8, and a filter is generally arranged on the oil pipe 8 between the oil outlet cylinder joint 9 and the hydraulic oil tank and used for filtering impurities in hydraulic oil. The hydraulic oil tank is communicated with the hydraulic pump through an oil pipe 8, so that a complete hydraulic oil cylinder 1 driving loop is formed.
The extrusion device comprises a hydraulic oil cylinder 1, a first push plate 2, a first fixing plate 3, a push rod 4, a pressing plate 5, a guide sleeve 6, a guide pillar 7, an oil pipe 8, an oil cylinder joint 9, a second fixing plate 10 and a second push plate 11. The hydraulic oil cylinder 1 is common equipment in the market, and a pair of oil inlet and outlet cylinder joints 9 connected with an oil pipe 8 are arranged on the side surface of the hydraulic oil cylinder 1. The hydraulic pump is communicated with an oil inlet cylinder joint 9 through an oil pipe 8, and a safety valve is generally arranged on the oil pipe 8 between the hydraulic pump and the cylinder joint 9. The oil outlet cylinder joint 9 is communicated with the hydraulic oil tank through an oil pipe 8, and a filter is generally arranged on the oil pipe 8 between the oil outlet cylinder joint 9 and the hydraulic oil tank and used for filtering impurities in hydraulic oil. The hydraulic oil tank is communicated with the hydraulic pump through an oil pipe 8, so that a complete hydraulic oil cylinder 1 driving loop is formed.
The output end of the hydraulic oil cylinder 1 is fixed on the bottom surface of the first push plate 2, the top surface of the first push plate 2 is fixedly connected with the first fixing plate 3, and the ejector rod 4 is fixed on the first fixing plate 3. In the embodiment, one hydraulic oil cylinder 1 and 6 push rods 4 for extrusion are adopted, and in other embodiments, the number of the oil cylinders and the number of the extrusion push rods can be changed according to requirements, and the principle is not changed. The hydraulic oil cylinder 1 can push the first push plate 2 to move up and down. Guide posts 7 are fixedly arranged at four corners of the first fixing plate 3, the guide posts 7 are hollow, and the four ejector rods 4 at the four corners penetrate through the guide posts 7 respectively. A pressing plate 5 is further arranged above the first fixing plate 3, a rectangular concave cavity 16 is formed in the movable die frame 12, and the pressing plate 5 is fixed in the rectangular concave cavity 16. The guide post 7 is sleeved with a guide sleeve 6, and the guide sleeve 6 can be a self-lubricating guide sleeve. The guide post 7 is matched with the guide sleeve 6, and the guide post 7 can move up and down in the guide sleeve 6 under the pushing of the first push plate 2. The guide post 7 and the guide sleeve 6 are matched to ensure that extrusion or ejection is carried out in a vertical linear motion, and a die cannot be damaged due to inclination.
The ejector rod sleeve 14 is arranged in a hollow mode and communicated with the die cavity, a first through hole is formed in the movable lining die 13, a second through hole is correspondingly formed in the movable die frame 12, the ejector rod sleeve 14 is installed in the first through hole, a hollow ejector column 15 is installed in the second through hole, and the ejector rod 4 penetrates through the ejector column 15 and the ejector rod sleeve 14. The guide sleeve 6 is fixed at the lower end of a second through hole formed in the movable mold frame 12, the pressing plate 5 is fixed on the movable mold frame 12, and the pressing plate 5 tightly presses and fixes the guide sleeve 6 and the top column 15. The ejector columns 15 and the ejector rod sleeves 14 are arranged to provide a path for the ejector rods to pass through on one hand, and facilitate the disassembly of the movable die frame and the movable lining die on the other hand. Each of the lift pins 4 is fitted with one of the lift pin sleeves 14, the lift pins 4 are inserted into the lift pin sleeves 14, and the lift pins can extrude a casting.
The mandrel 4 is one of the core components of the structure, and because the mandrel 4 is long in length and thin in diameter, and bending, breaking and pulling damage of the mandrel are avoided in the extrusion process, besides the conventional material, titanium nitride aluminide treatment is carried out on the surface of the mandrel to increase red heat resistance and wear resistance, and in the embodiment, a titanium nitride aluminide coating is prepared on the surface of the mandrel 4. Meanwhile, in order to ensure the strength by extruding the ejector rod sleeve 14 with a thin wall, the inner surface of the ejector rod sleeve 14 is nitrided to enhance the surface strength and the wear resistance.
In order to ensure the extrusion or ejection force and meet the requirements of different extrusion distances and ensure the extrusion or ejection effect, in this embodiment, the other end corresponding to the output end of the hydraulic oil cylinder 1 is fixed on the second push plate 11, and the second push plate 11 can push the extrusion device to move up and down under the action of external thrust. In addition, in this embodiment, the second fixing plate 10 is fixed on the second push plate 11, and a common ejector rod is fixedly installed on the second fixing plate 10, and the common ejector rod and the 6 ejector rods 4 cooperate to eject the casting 17 together.
During the assembly process: the ejector rod sleeve 14 is arranged on the movable lining die 13 in a matched mode according to the shaft hole, and then the ejector rod sleeve and the movable lining die are arranged on the movable die frame 13 from the front side; the top column 15 and the guide sleeve 6 are arranged on the movable mould frame 12, the guide sleeve 6 and the movable mould frame 12 are arranged in a shaft hole matching mode, then the pressing plate 5 is arranged on the movable mould frame 12 and is fixed by using M10x20 hexagon socket head cap screw, and the fixing structure is adopted; the guide sleeve 6 is fixed in a hole of the movable mould frame 12; 4 guide posts 7 are arranged in holes arranged on the first fixing plate 3, and 6 ejector rods 4 are arranged in the guide posts 7 and the holes arranged on the first fixing plate 3 (as shown in figures 1-2); connecting the first push plate 2 to the first fixing plate 3 by using an M12x50 socket head cap screw (26), and mounting the hydraulic oil cylinder 1 on the first push plate 2; after the extrusion device is partially combined, the extrusion device is arranged below the movable die frame 12 according to the principle that the ejector rod 4 is matched with the axle hole of the ejector rod sleeve 14; finally, the second push plate 11 and the second fixing plate 10 are connected to the hydraulic cylinder 1 as a whole by M10x55 socket head cap screws using bolts.
In the casting process of the mold, after the casting 17 is filled, the stroke of the extrusion cylinder is about 8mm, and in the casting cooling shrinkage process, the extrusion ejector rod 4 extrudes 8mm forwards, so that the casting 17 can be effectively extruded, and the shrinkage porosity defect caused by cooling shrinkage in the casting 17 is eliminated.
In addition, the extrusion device is arranged on the ejection mechanism, and after the extrusion process is finished, the extrusion mandril 4 can move forwards along with the second push plate 11 to perform the ejection function. The extrusion apparatus is inside the mold and in the center of the cast 17 projection, the extrusion and ejection structure must be integrated to meet space requirements.
Secondly, the extrusion apparatus is connected to a separate hydraulic ram 1, so that the initial time of extrusion (e.g. the start of extrusion after 1 second or 1.5 seconds after the filling of the casting) can be adjusted to an optimum process depending on the condition of the casting 17.
In conclusion, the casting mold in the embodiment adopts the design that the extrusion device is matched with the ejector rod sleeve, the poor shrinkage porosity is eliminated by extruding the aluminum alloy casting through the extrusion device in the casting process, the quality of a product is improved, meanwhile, the casting is ejected out by the extrusion device after the mold is opened, and the limited space of the mold can be effectively utilized by adopting an extrusion and ejection combined structure.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (9)
1. An extrusion device is characterized by comprising a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down.
2. The extrusion apparatus as claimed in claim 1, wherein guide posts are fixedly provided at four corners of the first fixing plate, the guide posts are hollow, and the top bar passes through the guide posts; the guide sleeve is sleeved on the guide pillar, the guide pillar is matched with the guide sleeve, the guide sleeve is fixed, and the guide pillar can move up and down in the guide sleeve under the pushing of the first push plate.
3. A press device as claimed in claim 1, wherein the opposite end of the hydraulic ram to the output end is fixed to a second pusher plate which is adapted to push the press device up and down by external thrust.
4. A casting mould is characterized by comprising a movable mould frame, a movable lining mould, a fixed mould frame and a fixed lining mould, wherein the fixed mould frame and the fixed lining mould are fixedly arranged;
the extrusion device comprises a hydraulic oil cylinder, a first push plate, a first fixing plate and an ejector rod, wherein the output end of the hydraulic oil cylinder is fixed on the bottom surface of the first push plate, the top surface of the first push plate is fixedly connected with the first fixing plate, and the ejector rod is fixed on the first fixing plate; the hydraulic oil cylinder can push the first push plate to move up and down;
the ejector rod sleeve is arranged in a hollow mode and communicated with the die cavity, each ejector rod is matched with one ejector rod sleeve, the ejector rods extend into the ejector rod sleeves, and the ejector rods can extrude castings.
5. A casting mold according to claim 4, wherein the other end of the hydraulic cylinder opposite to the output end is fixed to a second pushing plate, and the second pushing plate can push the pressing means to move up and down by an external pushing force.
6. A casting mold according to claim 4, wherein the surface of the ejector pin is prepared with a titanium aluminum nitride coating; and nitriding the inner surface of the ejector rod sleeve.
7. A casting mold according to claim 4, wherein a first through hole is formed in the movable lining mold, a second through hole is correspondingly formed in the movable mold frame, the ejector pin sleeve is installed in the first through hole, a hollow ejector pin is installed in the second through hole, and the ejector pin passes through the ejector pin and the ejector pin sleeve.
8. The casting mold according to any one of claims 4-7, wherein guide posts are fixedly disposed at four corners of the first fixing plate, the guide posts are hollow, and four ejector rods respectively penetrate through the guide posts; the guide post is sleeved on the guide post, the guide post is matched with the guide sleeve, the guide sleeve is fixed in the movable die frame, the pressing plate is fixed on the movable die frame and tightly presses the guide sleeve, and the guide post can move up and down in the guide sleeve under the pushing of the first pushing plate.
9. A casting mold according to claim 8, wherein a rectangular recessed cavity is formed in the movable mold frame, and the platen is fixed in the rectangular recessed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346749.7A CN111318664A (en) | 2020-04-28 | 2020-04-28 | Extrusion device and casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346749.7A CN111318664A (en) | 2020-04-28 | 2020-04-28 | Extrusion device and casting die |
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| Publication Number | Publication Date |
|---|---|
| CN111318664A true CN111318664A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010346749.7A Pending CN111318664A (en) | 2020-04-28 | 2020-04-28 | Extrusion device and casting die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114029471A (en) * | 2021-12-13 | 2022-02-11 | 河南英利特科技股份有限公司 | A kind of casting mould and casting method |
| CN114260436A (en) * | 2021-11-12 | 2022-04-01 | 浙江辉旺机械科技股份有限公司 | A multi-point synchronous extrusion structure of a die-casting die |
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| CN114260436A (en) * | 2021-11-12 | 2022-04-01 | 浙江辉旺机械科技股份有限公司 | A multi-point synchronous extrusion structure of a die-casting die |
| CN114029471A (en) * | 2021-12-13 | 2022-02-11 | 河南英利特科技股份有限公司 | A kind of casting mould and casting method |
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