CN114029471A - Casting mold and casting method - Google Patents
Casting mold and casting method Download PDFInfo
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- CN114029471A CN114029471A CN202111515557.5A CN202111515557A CN114029471A CN 114029471 A CN114029471 A CN 114029471A CN 202111515557 A CN202111515557 A CN 202111515557A CN 114029471 A CN114029471 A CN 114029471A
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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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
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/04—Handling or stripping castings or ingots
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention belongs to the technical field of casting, and discloses a casting mold and a casting method, wherein the casting mold comprises a fixed mold frame and a movable mold frame which can be opened and closed to move, and a supporting seat is arranged on the left end face of the movable mold frame; the casting mould is used for casting and forming the hemispherical shell; the left end surface of the fixed mold frame is embedded with a fixed mold cavity, and the right end surface of the movable mold frame is embedded with a movable mold cavity; a concave cavity is formed in the center of the left end face of the fixed die cavity, a bulge is formed in the center of the right end face of the movable die cavity, and an annular groove is formed around the bulge; the center of the bulge is provided with a top column component; the top column component can move left and right in the movable mould cavity. The invention has simple structure and convenient operation; the casting mould structure can reduce the generation of air holes of the product in the casting process, obtain the product meeting the requirements, improve the qualification rate of the product and reduce the production cost.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a casting mold and a casting method.
Background
The casting is a process of injecting a prepared casting raw material into a mold to be solidified, so as to obtain a product similar to a mold cavity. The raw material for the casting may be a monomer, a preliminarily polymerized or polycondensed slurry, or a solution of a polymer and a monomer, or the like.
In the process of producing the hemispherical shell with high density requirement, the product produced by adopting the casting mould and the casting method commonly used in the prior art often has air holes, so that the density of the product can not meet the factory requirement, the rejection rate is high, the production efficiency is low, the production cost is also high, and improvement is needed urgently.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art and provides a casting mold and a casting method.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a casting mould comprises a fixed mould frame and a movable mould frame which can be opened and closed to move, and a supporting seat is arranged on the left end face of the movable mould frame; the casting mould is used for casting and forming the hemispherical shell; the hemispherical shell comprises a hemispherical part and an annular edge of the lower end face of the hemispherical part; the supporting seat comprises two supporting legs which are symmetrical up and down; an ejection assembly is arranged between the two support legs;
the left end surface of the fixed mold frame is embedded with a fixed mold cavity, and the right end surface of the movable mold frame is embedded with a movable mold cavity; a concave cavity is formed in the center of the left end face of the fixed die cavity, a bulge is formed in the center of the right end face of the movable die cavity, and an annular groove is formed around the bulge; the annular groove is matched with the annular edge; the concave cavity is matched with the outer spherical surface of the hemispherical part;
the center of the bulge is provided with a top column component; the ejection column component can move left and right in the movable model cavity; a pressure chamber B is arranged in the fixed die frame, and a feeding channel B communicated with the concave cavity is arranged in the pressure chamber B;
a pressure chamber A is arranged at the right side of the pressure chamber B, and a feeding channel A communicated with the feeding channel B is arranged in the pressure chamber A; a pouring port communicated with the feeding channel A is arranged at the upper part of the right side of the pressure chamber A, and a punch moving left and right is arranged in the pressure chamber A;
when the top column assembly moves to the rightmost side, the right end face of the top column assembly blocks the left end of the feeding channel B;
when the ejection column assembly moves to the leftmost side, the curved surface formed by the right end surface of the ejection column assembly and the bulge is matched with the inner spherical surface of the hemispherical part, and the right end surface of the ejection column assembly, the left end surface of the pressure chamber B, the bulge, the annular groove and the cavity form a cavity matched with the hemispherical shell.
Preferably, the feed channel A and the feed channel B are coaxial and have the same inner diameter; the opening of the pouring gate is upward.
Preferably, a plurality of slag ladles are arranged around the outer ring of the annular groove; each slag ladle is communicated with an exhaust groove; the exhaust duct extends from the right end face of the movable mold cavity to the right end face of the movable mold frame.
Preferably, the top column assembly comprises a top column, a spring and a blocking ring;
a support pillar guide sleeve is arranged between the support pillar and the movable model cavity; the ejection column guide sleeve is fixedly connected with the movable model cavity, and the ejection column moves left and right in the ejection column guide sleeve; a cylindrical deep groove is formed in the center of the left end face of the top column, and a blocking ring is fixed on the left side of the deep groove; the outer diameter of the blocking ring is larger than the inner diameter of the deep groove;
a placing groove is arranged in the movable mould frame on the left side of the top column; a spring is placed in the placing groove; the spring presses the top column to the left end of the feed channel B.
Preferably, the top column guide sleeve is of an integrated structure and comprises a right tubular part and a left guide ring; the top column is of an integrated structure and comprises a right columnar part and a left guide disc; the guide disc is matched with the guide ring, and the guide disc can move left and right in the guide ring;
a rectangular positioning surface A is arranged on the guide ring, and a positioning surface B matched with the positioning surface A is arranged on the guide disc.
Preferably, the ejection assembly comprises an ejector plate, a push rod A, a push rod B, a guide post A and a limiting guide post;
a plurality of limiting blocks are symmetrically arranged on the opposite end surfaces of the two supporting legs; the ejector plate is positioned on the right side of the limiting block; the limiting guide post and the guide post A are both fixedly arranged on the left end surface of the movable mold frame between the two support legs; the tail ends of the limiting guide column and the guide column A penetrate through the ejector plate, and the ejector plate can slide left and right along the limiting guide column and the guide column A;
the ejector plate comprises a push plate and a push rod fixing plate, and the tails of the push rod A and the push rod B are fixed between the push plate and the push rod fixing plate;
the head of the push rod A penetrates through the bottom of the annular groove in a surrounding mode and is flush with the bottom of the annular groove; the push rods B are multiple, each slag ladle is penetrated by one push rod B, and the head of each push rod B is flush with the bottom of each slag ladle.
Preferably, the ejection assembly further comprises a push rod D and a push rod E; the tails of the push rod D and the push rod E are fixed between the push plate and the push rod fixing plate; (ii) a
The four push rods D penetrate through the movable model cavity in a rectangular shape, and the head of each push rod D is flush with the right end face of the movable model cavity;
a plurality of through holes are distributed around the placing groove, the inner diameter of each through hole is matched with the outer diameter of the push rod E, and the push rod E extends into the through holes.
Preferably, a plurality of guide posts B are installed on the right end face of the movable mold frame, and guide holes matched with the guide posts B are formed in the left end face of the fixed mold frame.
The casting method for casting by adopting the casting mould comprises the following steps:
s1 casting mold treatment: after the casting die is assembled, fixed and stable, preheating the casting die, the pressure chamber A and the punch;
s2 casting: after preheating is finished, the punch is inserted into the pressure chamber A, the left end face of the punch is positioned on the right side of the pouring port, and the punch blocks the right end of the feeding channel B; then, pouring casting liquid into the feeding channel A and the feeding channel B through a pouring port;
the casting comprises the following stages: in the early stage of casting, after the casting liquid is injected, the punch is driven to move leftwards until the punch blocks the pouring gate; in the middle stage of casting, the punch continuously pushes the casting liquid until the feeding channel B is completely filled with the casting liquid; in the later stage of casting, the punch head continuously moves leftwards, the ejection column assembly moves leftwards under the pushing of casting liquid under the action of the punch head to fill the cavity, the left end face of the punch head extends into the feeding channel B, and the punch head stops moving;
s3, cooling the casting die after casting, and keeping the punch pressurized during cooling;
s4, demolding, after cooling, pushing the ejection assembly to perform demolding to obtain a hemispherical shell blank; and processing the semi-spherical shell to obtain a semi-spherical shell finished product.
Preferably, the casting process punch is continuously moved; the moving speed of the punch at the early stage of casting is 0.1-0.3m/s, the moving speed of the punch at the middle stage of casting is 0.6-0.8m/s, and the moving speed of the punch at the later stage of casting is 2 m/s.
The invention has the following action principle:
according to the structure of the casting die, the ejection column can block the left end face of the feeding channel B before casting, so that casting liquid (molten metal) is prevented from directly entering a cavity to form a cold shut under the pushing action of the punch; and the casting liquid is prevented from carrying a large amount of air to directly enter the cavity, and the generation of bubbles is reduced.
When casting liquid is cast, under the pushing action of the punch, the surface pressure is gradually increased, and when the pressure is greater than the elastic force of the spring on the left side of the ejection column, the ejection column retreats suddenly, so that the casting liquid is filled in the cavity quickly.
During casting, in the process that the punch moves to enable the casting liquid to be filled in the feeding channel B, gas in the casting liquid is conveniently discharged.
In the cooling process, the punch head still keeps a pressurized state to participate in the whole cooling, the casting liquid is cooled, solidified and formed under the action of pressure, and the obtained product has fewer air holes compared with the traditional process and can reach the required density. The quality of the obtained product is between that of a die-casting process and a semi-solid extrusion process, and the cost of the invention is lower compared with that of the die-casting process or the semi-solid extrusion process.
The invention achieves the following beneficial effects:
the invention has simple structure and convenient operation; the casting mould structure can reduce the generation of air holes of the product in the casting process, obtain the product meeting the requirements, improve the qualification rate of the product and reduce the production cost.
Drawings
FIG. 1 is a schematic perspective view of embodiment 1;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic perspective view of FIG. 1 with the mold holding frame and the pressure chamber A removed;
FIG. 4 is a right side view of the movable mold frame and the movable mold cavity of FIG. 2;
FIG. 5 is a schematic perspective view of FIG. 3 with the stationary mold cavity, the moving mold cavity, and the pressure chamber B removed;
FIG. 6 is a schematic perspective view of the socket of embodiment 1;
FIG. 7 is a schematic perspective view of the head post according to example 1;
FIG. 8 is a schematic perspective view of a hemispherical shell according to the present invention;
FIG. 9 is a schematic view showing a state after completion of the late stage of casting in example 2.
In the figure: 1. a fixed mould frame; 2. moving the mold frame; 3. a hemispherical portion; 4. an annular rim; 5. a support leg; 6. a die cavity is fixed; 7. a movable model cavity; 8. a concave cavity; 9. a protrusion; 10. an annular groove; 11. a feed channel B; 12. slag ladle; 13. an exhaust groove; 14. a pressure chamber B; 15. a feed channel A; 16. a tubular portion; 17. a top pillar; 18. a spring; 19. plugging a ring; 20. a top pillar guide sleeve; 21. deep grooves; 22. a placement groove; 23. a guide ring; 24. a guide plate; 25. a positioning surface A; 26. a positioning surface B; 27. pushing the plate; 28. a push rod A; 29. a push rod B; 30. a columnar portion; 31. a guide post A; 32. limiting the guide post; 33. a limiting block; 34. a push rod D; 35. a push rod E; 36. a through hole; 37. a guide post B; 38. a pressure chamber A; 39. a pouring port; 40. a punch; 41. a push rod fixing plate; 42. and (4) casting liquid.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
Example 1
As shown in fig. 1 to 8, the casting mold comprises a fixed mold frame 1 and a movable mold frame 2 which can be opened and closed and displaced, and a supporting seat is arranged on the left end surface of the movable mold frame 2; the casting mould is used for casting and forming the hemispherical shell; the hemispherical shell comprises a hemispherical part 3 and an annular edge 4 of the lower end face of the hemispherical part 3;
the supporting seat comprises two supporting legs 5 which are symmetrical up and down; an ejection assembly is arranged between the two support legs 5;
a fixed die cavity 6 is embedded in the left end face of the fixed die frame 1, and a movable die cavity 7 is embedded in the right end face of the movable die frame 2; a concave cavity 8 is arranged in the center of the left end face of the fixed die cavity 6, a bulge 9 is arranged in the center of the right end face of the movable die cavity 7, and an annular groove 10 is formed around the bulge 9; the annular groove 10 is matched with the annular edge 4; the concave cavity 8 is matched with the outer spherical surface of the hemispherical part 3;
the center of the bulge 9 is provided with a top column component; the top column component can move left and right in the movable model cavity 7; a pressure chamber B14 is arranged in the fixed die frame 1, and a feeding channel B11 communicated with the concave cavity is arranged in the pressure chamber B14;
a pressure chamber A38 is arranged at the right side of the pressure chamber B14, and a feed channel A15 communicated with the feed channel B11 is arranged in the pressure chamber A38; a pouring port 39 communicated with the feeding channel A15 is arranged at the upper part of the right side of the pressure chamber A38, and a punch 40 moving left and right is arranged in the pressure chamber A38;
when the top column assembly moves to the rightmost direction, the right end face of the top column assembly blocks the left end of the feed channel B11;
when the ejection column assembly moves to the leftmost side, the curved surface formed by the right end surface of the ejection column assembly and the bulge 9 is matched with the inner spherical surface of the hemispherical part 3, and the right end surface of the ejection column assembly, the left end surface of the pressure chamber B, the bulge 9, the annular groove 10 and the cavity 8 form a cavity matched with the hemispherical shell.
The feed channel A15 and the feed channel B11 are coaxial and have the same inner diameter; the pouring gate 39 opens upward.
A plurality of slag ladles 12 are arranged around the outer side of the annular groove 10; each slag ladle 12 is communicated with an exhaust groove 13; the exhaust duct 13 extends from the right end surface of the movable mold cavity 7 to the right end surface of the movable mold frame 2.
The top column assembly comprises a top column 17, a spring 18 and a blocking ring 19;
a top column guide sleeve 20 is arranged between the top column and the movable mould cavity; the top column guide sleeve 20 is fixedly connected with the movable mould cavity 7, and the top column 17 moves left and right in the top column guide sleeve 20; a cylindrical deep groove 21 is formed in the center of the left end face of the top column 17, and a blocking ring 19 is fixed on the left side of the deep groove 21; the outer diameter of the blocking ring 19 is larger than the inner diameter of the deep groove 21;
a placing groove 22 is arranged in the movable mould frame on the left side of the top column 17; the spring 18 is arranged in the placing groove 22; the spring 18 presses the top pillar 17 against the left end of the feed passage B11.
The top column guide sleeve 20 is of an integrated structure and comprises a right tubular part 16 and a left guide ring 23; the top column 17 is of an integrated structure and comprises a right column part 30 and a left guide disc 24; the guide disc 24 is matched with the guide ring 23, and the guide disc 24 can move left and right in the guide ring 23;
the guide ring 23 is provided with a rectangular positioning surface A25, and the guide disc 24 is provided with a positioning surface B26 matched with the positioning surface A25.
The ejection assembly comprises an ejector plate, a push rod A28, a push rod B29, a guide post A31 and a limiting guide post 32;
two limiting blocks 33 are symmetrically arranged on the opposite end surfaces of the two support legs 5; the ejector plate is positioned on the right side of the limiting block 33; the limiting guide post 32 and the guide post A31 are both fixedly arranged on the left end surface of the movable mold frame between the two support legs 5; the tail ends of the limiting guide post 32 and the guide post A31 penetrate through the ejector plate, and the ejector plate can slide left and right along the limiting guide post 32 and the guide post A31;
the ejector plate comprises a push plate 27 and a push rod fixing plate 41, and the tails of a push rod A28 and a push rod B29 are fixed between the push plate 27 and the push rod fixing plate 41;
the number of the push rods A28 is six, and the head of the push rod A28 passes through the bottom of the annular groove 10 in a surrounding mode and is flush with the bottom of the annular groove 10; ten push rods B29 are provided, each slag ladle 12 is penetrated by one push rod B29, and the head of the push rod B29 is flush with the bottom of the slag ladle 12.
The ejection assembly further comprises a push rod D34 and a push rod E35; the tails of the push rod D34 and the push rod E35 are fixed between the push plate 27 and the push rod fixing plate 41; (ii) a
Four push rods D34 penetrate through the movable mould cavity 7 in a rectangular shape, and the head of the push rod D34 is flush with the right end face of the movable mould cavity 7;
four through holes 36 are distributed around the placing groove 22 in a surrounding manner, the inner diameter of each through hole 36 is matched with the outer diameter of the push rod E35, and the push rod E35 extends into the through holes 36; the projections of the through holes 36 all fall on the guiding disc 24.
Four guide posts B37 are arranged on the right end face of the movable mould frame 2 in a rectangular distribution, and the left end face of the fixed mould frame is provided with guide holes (not shown in the figure) matched with the guide posts B.
The outer diameter of the left end of the limiting guide post is smaller than that of the right end of the limiting guide post, and when the ejector plate moves to the rightmost end, the ejector plate is limited through the limiting guide post.
Example 2
A casting method of casting using the casting mold of example 1, comprising the steps of:
s1 casting mold treatment: after the casting die is assembled, fixed and stable, preheating the casting die, the pressure chamber A and the punch;
s2 casting: after preheating is finished, the punch is inserted into the pressure chamber A, the left end face of the punch is positioned on the right side of the pouring port, and the punch blocks the right end of the feeding channel B; then, pouring casting liquid into the feeding channel A and the feeding channel B through a pouring port;
the casting comprises the following stages: in the early stage of casting, after the casting liquid is injected, the punch is driven to move leftwards until the punch blocks the pouring gate; in the middle stage of casting, the punch continuously pushes the casting liquid until the feeding channel B is completely filled with the casting liquid; in the later stage of casting, the punch head continuously moves leftwards, the ejection column assembly moves leftwards under the pushing of casting liquid under the action of the punch head to fill the cavity, the left end face of the punch head extends into the feeding channel B, and the punch head stops moving;
s3, cooling the casting die after casting, and keeping the punch pressurized during cooling;
s4, demolding, after cooling, pushing the ejection assembly to perform demolding to obtain a hemispherical shell blank; and processing the semi-spherical shell to obtain a semi-spherical shell finished product.
In step S2, the casting process punch is continuously moved; the moving speed of the punch at the early stage of casting is 0.2m/s, the moving speed of the punch at the middle stage of casting is 0.7m/s, and the moving speed of the punch at the later stage of casting is 2 m/s.
As shown in fig. 9, which is a schematic view of the state after the casting late stage is completed in this embodiment, in the actual casting process, the weight of the casting liquid is greater than the weight of the finished hemispherical shell, and while the casting liquid 42 fills the cavity, a part of the casting liquid 42 remains in the feeding channel B11, and the excess part is removed by machining after demolding.
Example 3
Example 3 is the same as the step of example 2 except that in step S2, the casting process punch is continuously moved; the moving speed of the punch at the early stage of casting is 0.1m/s, the moving speed of the punch at the middle stage of casting is 0.6m/s, and the moving speed of the punch at the later stage of casting is 2 m/s.
Example 4
Example 4 is the same as the step of example 2 except that in step S2, the casting process punch is continuously moved; the moving speed of the punch at the early stage of casting is 0.3m/s, the moving speed of the punch at the middle stage of casting is 0.8m/s, and the moving speed of the punch at the later stage of casting is 2 m/s.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (10)
1. A casting mould comprises a fixed mould frame and a movable mould frame which can be opened and closed to move, and a supporting seat is arranged on the left end face of the movable mould frame; the casting mould is used for casting and forming the hemispherical shell; the hemispherical shell comprises a hemispherical part and an annular edge of the lower end face of the hemispherical part; the method is characterized in that:
the supporting seat comprises two supporting legs which are symmetrical up and down; an ejection assembly is arranged between the two support legs;
the left end surface of the fixed mold frame is embedded with a fixed mold cavity, and the right end surface of the movable mold frame is embedded with a movable mold cavity; a concave cavity is formed in the center of the left end face of the fixed die cavity, a bulge is formed in the center of the right end face of the movable die cavity, and an annular groove is formed around the bulge; the annular groove is matched with the annular edge; the concave cavity is matched with the outer spherical surface of the hemispherical part;
the center of the bulge is provided with a top column component; the ejection column component can move left and right in the movable model cavity; a pressure chamber B is arranged in the fixed die frame, and a feeding channel B communicated with the concave cavity is arranged in the pressure chamber B;
a pressure chamber A is arranged at the right side of the pressure chamber B, and a feeding channel A communicated with the feeding channel B is arranged in the pressure chamber A; a pouring port communicated with the feeding channel A is arranged at the upper part of the right side of the pressure chamber A, and a punch moving left and right is arranged in the pressure chamber A;
when the top column assembly moves to the rightmost side, the right end face of the top column assembly blocks the left end of the feeding channel B;
when the ejection column assembly moves to the leftmost side, the curved surface formed by the right end surface of the ejection column assembly and the bulge is matched with the inner spherical surface of the hemispherical part, and the right end surface of the ejection column assembly, the left end surface of the pressure chamber B, the bulge, the annular groove and the cavity form a cavity matched with the hemispherical shell.
2. A casting mould according to claim 1, characterised in that: the feeding channel A and the feeding channel B are coaxial and have the same inner diameter; the opening of the pouring gate is upward.
3. A casting mould according to claim 2, characterised in that: a plurality of slag ladles are arranged around the outer ring of the annular groove; each slag ladle is communicated with an exhaust groove; the exhaust duct extends from the right end face of the movable mold cavity to the right end face of the movable mold frame.
4. A casting mould according to claim 3, characterized in that: the top column assembly comprises a top column, a spring and a blocking ring;
a support pillar guide sleeve is arranged between the support pillar and the movable model cavity; the ejection column guide sleeve is fixedly connected with the movable model cavity, and the ejection column moves left and right in the ejection column guide sleeve; a cylindrical deep groove is formed in the center of the left end face of the top column, and a blocking ring is fixed on the left side of the deep groove; the outer diameter of the blocking ring is larger than the inner diameter of the deep groove;
a placing groove is arranged in the movable mould frame on the left side of the top column; a spring is placed in the placing groove; the spring presses the top column to the left end of the feed channel B.
5. A casting mould according to claim 4, characterized in that: the top column guide sleeve is of an integrated structure and comprises a right tubular part and a left guide ring; the top column is of an integrated structure and comprises a right columnar part and a left guide disc; the guide disc is matched with the guide ring, and the guide disc can move left and right in the guide ring;
a rectangular positioning surface A is arranged on the guide ring, and a positioning surface B matched with the positioning surface A is arranged on the guide disc.
6. A casting mould according to claim 5, characterized in that: the ejection assembly comprises an ejector plate, a push rod A, a push rod B, a guide post A and a limiting guide post;
a plurality of limiting blocks are symmetrically arranged on the opposite end surfaces of the two supporting legs; the ejector plate is positioned on the right side of the limiting block; the limiting guide post and the guide post A are both fixedly arranged on the left end surface of the movable mold frame between the two support legs; the tail ends of the limiting guide column and the guide column A penetrate through the ejector plate, and the ejector plate can slide left and right along the limiting guide column and the guide column A;
the ejector plate comprises a push plate and a push rod fixing plate, and the tails of the push rod A and the push rod B are fixed between the push plate and the push rod fixing plate;
the head of the push rod A penetrates through the bottom of the annular groove in a surrounding mode and is flush with the bottom of the annular groove; the push rods B are multiple, each slag ladle is penetrated by one push rod B, and the head of each push rod B is flush with the bottom of each slag ladle.
7. The casting mold according to claim 6, characterized in that: the ejection assembly further comprises a push rod D and a push rod E; the tails of the push rod D and the push rod E are fixed between the push plate and the push rod fixing plate; the four push rods D penetrate through the movable model cavity in a rectangular shape, and the head of each push rod D is flush with the right end face of the movable model cavity;
a plurality of through holes are distributed around the placing groove, the inner diameter of each through hole is matched with the outer diameter of the push rod E, and the push rod E extends into the through holes.
8. The casting mold according to claim 7, characterized in that: and a plurality of guide posts B are arranged on the right end surface of the movable mold frame, and guide holes matched with the guide posts B are arranged on the left end surface of the fixed mold frame.
9. Casting method for casting with a casting mould according to any of claims 1 to 8, characterized in that: the method comprises the following steps:
s1 casting mold treatment: after the casting die is assembled, fixed and stable, preheating the casting die, the pressure chamber A and the punch;
s2 casting: after preheating is finished, the punch is inserted into the pressure chamber A, the left end face of the punch is positioned on the right side of the pouring port, and the punch blocks the right end of the feeding channel B; then, pouring casting liquid into the feeding channel A and the feeding channel B through a pouring port;
the casting comprises the following stages: in the early stage of casting, after the casting liquid is injected, the punch is driven to move leftwards until the punch blocks the pouring gate; in the middle stage of casting, the punch continuously pushes the casting liquid until the feeding channel B is completely filled with the casting liquid; in the later stage of casting, the punch head continuously moves leftwards, the ejection column assembly moves leftwards under the pushing of casting liquid under the action of the punch head to fill the cavity, the left end face of the punch head extends into the feeding channel B, and the punch head stops moving;
s3, cooling the casting die after casting, and keeping the punch pressurized during cooling;
s4, demolding, after cooling, pushing the ejection assembly to perform demolding to obtain a hemispherical shell blank; and processing the semi-spherical shell to obtain a semi-spherical shell finished product.
10. Casting method according to claim 9, characterized in that: the punch head continuously moves in the casting process; the moving speed of the punch at the early stage of casting is 0.1-0.3m/s, the moving speed of the punch at the middle stage of casting is 0.6-0.8m/s, and the moving speed of the punch at the later stage of casting is 2 m/s.
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| CN202111515557.5A CN114029471A (en) | 2021-12-13 | 2021-12-13 | Casting mold and casting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114783662A (en) * | 2022-04-15 | 2022-07-22 | 江苏益帆高分子材料有限公司 | Flame-retardant silane crosslinked polyethylene cable material and preparation method thereof |
| CN115945652A (en) * | 2023-02-27 | 2023-04-11 | 蓬莱市金鑫铸造有限公司 | Casting device capable of achieving rapid demoulding |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114783662A (en) * | 2022-04-15 | 2022-07-22 | 江苏益帆高分子材料有限公司 | Flame-retardant silane crosslinked polyethylene cable material and preparation method thereof |
| CN114783662B (en) * | 2022-04-15 | 2023-03-10 | 江苏益帆高分子材料有限公司 | Flame-retardant silane crosslinked polyethylene cable material and preparation method thereof |
| CN115945652A (en) * | 2023-02-27 | 2023-04-11 | 蓬莱市金鑫铸造有限公司 | Casting device capable of achieving rapid demoulding |
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