CN109332603B - Piston casting equipment and outer die and cooling method thereof - Google Patents
Piston casting equipment and outer die and cooling method thereof Download PDFInfo
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- CN109332603B CN109332603B CN201811398749.0A CN201811398749A CN109332603B CN 109332603 B CN109332603 B CN 109332603B CN 201811398749 A CN201811398749 A CN 201811398749A CN 109332603 B CN109332603 B CN 109332603B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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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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Abstract
The invention discloses a piston casting device and an outer mold thereof, which comprise a mold body, wherein a vertical cylindrical cavity for molding the outside of a piston and a pouring channel communicated with the cylindrical cavity are arranged in the mold body, two bending water channels surrounding the cylindrical cavity are symmetrically arranged in the mold body, the middle parts of the bending water channels are parallel to the diameter of the cylindrical cavity, and two ends of the bending water channels are bent inwards and are close to the cylindrical cavity. Due to the structure of the bent water channel, the distance between the bent water channel and the piston blank is basically consistent, so that the periphery of the piston blank is uniformly cooled, the uniform structure and stable and consistent performance of the piston are ensured. The bent water channel can enable the periphery of the cylindrical cavity to be uniformly cooled, so that the temperature distribution of the whole external mold becomes uniform. The invention also discloses a cooling method of the piston casting equipment.
Description
Technical Field
The invention relates to the field of casting equipment, in particular to piston casting equipment and an outer die thereof. In addition, the invention also relates to a cooling method of the piston casting equipment.
Background
The metal piston is widely applied to various fields, the piston blank is cylindrical in shape, the wall of the head part is thick, the wall of the skirt part is thin, and the piston blank has the characteristic of uneven wall thickness.
The piston casting equipment generally comprises an outer die, an inner die, a die cover, a guide sleeve and the like. The components are combined to generate a die cavity for forming the piston blank, a pouring channel is arranged on the outer die, and the alloy solution enters the die cavity through the pouring channel and then is solidified to form the piston blank. The largest contact area between the outer die and the piston blank is the largest heat transfer part for the piston blank to change from a liquid state to a solid state, and the most important part for determining the solidification quality of the piston blank on the whole die.
The temperature distribution of the outer die determines the heat transfer effect of the outer die on the piston blank, and the uniform temperature distribution of the outer die can uniformly transfer heat and cool the piston blank. The piston blank is uniformly cooled by heat transfer, so that the metallographic structure of the piston is uniform, compact and refined, and the material performance of the piston is better and more consistent.
The existing mold outer mold is only provided with two straight water channels, when the outer mold is cooled by cooling water in the water channels, the straight water channels are not distributed around the circumference of the mold cavity, so that the temperature of the outer mold can not be uniformly distributed around the circumference of the mold cavity, the periphery of a piston blank in the outer mold can not be uniformly cooled, the cooling of a blank part close to the water channels is fast, the cooling of a blank part far away from the water channels is slow, the solidification of the periphery of the piston is not uniform, the metallographic structure of the blank is not uniform, and the performance of the piston is unstable.
And because metal flows into from the external mold pouring channel, the temperature of the position around the external mold pouring channel is highest, but the position of the external mold pouring channel is farthest away from the cooling water channel, so that the temperature around the mold pouring channel is highest, the solidification of the corresponding piston blank is also slowest, and the solidified area is the last solidified area, a casting thermal joint is generated, and the shrinkage porosity defect of the piston skirt is generated. Therefore, the prior art can not meet the uniform heat dissipation requirement of the outer die on the blank, can not solve the defect of overhigh temperature around the pouring channel and can not eliminate the casting thermal section.
Therefore, how to realize uniform and rapid cooling of the periphery of a piston blank on an outer die of piston casting equipment with an uneven structure is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide piston casting equipment and an outer mold thereof. Another object of the present invention is to provide a cooling method of the above piston casting apparatus.
In order to solve the technical problem, the invention provides an outer mold of piston casting equipment, which comprises a mold body, wherein a vertical cylindrical cavity for molding the outside of a piston and a pouring channel communicated with the cylindrical cavity are arranged in the mold body, two bending water channels surrounding the cylindrical cavity are symmetrically arranged in the mold body, the middle parts of the bending water channels are parallel to the diameter of the cylindrical cavity, and two ends of each bending water channel are bent inwards and are close to the cylindrical cavity.
Preferably, the bent water channel comprises a middle water channel, a front end water channel and a rear end water channel; the middle water channel is parallel to the diameter of the cylindrical cavity, one end of the middle water channel is positioned in the die body, and the opening of the other end of the middle water channel is positioned behind the die body;
the front end water channel is horizontally arranged and is intersected with the middle water channel, one end of the front end water channel is positioned in the die body, the opening of the other end of the front end water channel is positioned on the side surface of the die body, and the middle part of the front end water channel is communicated with one end of the middle water channel positioned in the die body;
the rear end water channel is horizontally arranged and is crossed with the middle water channel, one end of the rear end water channel is positioned in the die body, the opening of the other end of the rear end water channel is positioned on the side surface of the die body, and the middle part of the rear end water channel is communicated with the middle part of the middle water channel;
and plugs are arranged at the openings of the middle water channel, the front end water channel and the rear end water channel on the surface of the mould.
Preferably, the water-cooling die further comprises a water inlet channel and a water outlet channel, wherein the water inlet channel is horizontally arranged and perpendicular to the middle water channel, one end of the water inlet channel is communicated with one end of the front-end water channel positioned in the die body, and the other end of the water inlet channel is opened and positioned on the side surface of the die body and communicated with the outside;
the water outlet channel is parallel to the middle water channel, one end of the water outlet channel is communicated with one end of the rear water channel, which is positioned in the die body, and the other end of the water outlet channel is opened and positioned behind the die body and is communicated with the outside.
Preferably, the distance between the front end water channel and the surface opening end of the rear end water channel is smaller than the distance between the inner ends.
Preferably, the water channel bending device comprises a plurality of groups of water channels which are arranged in pairs, and the plurality of groups of water channels are sequentially arranged along the vertical direction.
Preferably, the inside symmetry of mould body is provided with and is located two U type water courses of watering both sides, the middle part vertical setting of U type water course is located the side of watering and be close to water, the both ends of U type water course to mould body's preceding bending and external intercommunication.
Preferably, the U-shaped water channel comprises a vertical water channel, an upper end water channel and a lower end water channel; the vertical water channel is positioned on the side surface of the pouring gate and close to the pouring gate, the lower end of the vertical water channel is positioned in the die body, and the opening at the upper end of the vertical water channel is positioned above the die body and is provided with a plug;
the upper end water channel is horizontally arranged and is crossed with the vertical water channel, one end of the upper end water channel is communicated with the middle part of the vertical water channel, and the opening of the other end of the upper end water channel is positioned in front of the die body and is communicated with the outside;
the lower end water channel is horizontally arranged and intersected with the vertical water channel, one end of the lower end water channel is communicated with the lower end of the vertical water channel, and the opening of the other end of the lower end water channel is positioned in front of the die body and communicated with the outside.
Preferably, the mould body includes two half moulds that bilateral symmetry set up, two the water course of buckling sets up respectively in two half moulds, two U type water course sets up respectively in two half moulds.
The invention also provides piston casting equipment which comprises an outer die and an inner die, wherein the outer die is any one of the outer dies.
The invention also provides a cooling method of the piston casting equipment, which comprises the following steps:
after the casting is finished, introducing cooling water into the U-shaped water channels on the two sides of the pouring gate after a first preset time;
after cooling water with a second preset time is introduced into the U-shaped water channel, immediately introducing the cooling water into the bent water channels (2) on the two sides of the cylindrical cavity;
and cooling water with a third preset time is introduced into the bent water channel, so that the outer die is cooled to a required range.
The invention provides an outer mold of piston casting equipment, which comprises a mold body, wherein a vertical cylindrical cavity for molding the outside of a piston and a pouring channel communicated with the cylindrical cavity are arranged in the mold body, two bending water channels surrounding the cylindrical cavity are symmetrically arranged in the mold body, the middle parts of the bending water channels are parallel to the diameter of the cylindrical cavity, and two ends of each bending water channel are bent inwards and are close to the cylindrical cavity.
Due to the structure of the bent water channel, the distance between the bent water channel and the piston blank is basically consistent, so that the periphery of the piston blank is uniformly cooled, the uniform structure and stable and consistent performance of the piston are ensured. The bent water channel can enable the periphery of the cylindrical cavity to be uniformly cooled, so that the temperature distribution of the whole external mold becomes uniform. Meanwhile, the total length of the bent water channel is longer than that of the straight water channel, so that the heat transfer and cooling speed is higher, the metallographic structure of the piston can be refined by the faster heat transfer and cooling, and the material performance is better. And at the later stage of piston blank solidification, the outer die is not filled with water, and then the outer die is heated properly, so that the purpose of avoiding the over-low temperature of the outer die and avoiding the defects of casting cold shut and the like of the next piston blank is realized.
The invention also provides a piston casting device comprising the outer die and a cooling method thereof, and the piston casting device and the cooling method thereof have the same technical effects due to the technical effects of the outer die, and are not described in detail herein.
Drawings
FIG. 1 is a top cross-sectional view of one embodiment of an outer mold provided by the present invention;
FIG. 2 is a schematic side view of one embodiment of an outer mold provided in accordance with the present invention;
fig. 3 is a partial cross-sectional view of a U-shaped water channel in an embodiment of an overmold provided herein.
Detailed Description
The core of the invention is to provide a piston casting device and an outer mold thereof, wherein two sides of a cylindrical cavity are provided with bent water channels, and two ends of each bent water channel are bent inwards and close to the cylindrical cavity, so that the periphery of a piston blank is uniformly and rapidly cooled. The other core of the invention is to provide a cooling method of the piston casting equipment.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, fig. 1 is a top sectional view of an embodiment of an outer mold according to the present invention; FIG. 2 is a schematic side view of one embodiment of an outer mold provided in accordance with the present invention; fig. 3 is a partial cross-sectional view of a U-shaped water channel in an embodiment of an overmold provided herein.
The outer mold of the piston casting equipment comprises a mold body 1, wherein a vertical cylindrical cavity 11 for forming the outer part of a piston blank and a pouring channel 12 communicated with the cylindrical cavity 11 are arranged inside the mold body 1, two bending water channels 2 surrounding the cylindrical cavity 11 are symmetrically arranged inside the mold body 1, the middle parts of the bending water channels 2 are parallel to the diameter of the cylindrical cavity 11, and two ends of the bending water channels 2 are bent inwards and are close to the cylindrical cavity 11.
Due to the structure of the bent water channel 2, two ends of the bent water channel 2 are bent inwards and are close to the cylindrical cavity 11, the distance between the bent water channel 2 and the piston blank is basically consistent, and the two bent water channels 2 surround the cylindrical cavity 11 instead of the traditional clamping cylindrical cavity 11 with a straight water channel, so that the piston blank is uniformly cooled all around, the piston is ensured to be uniformly organized, and the performance is stable and consistent. The bent water channel 2 can enable the periphery of the cylindrical cavity 11 to be cooled uniformly, so that the temperature distribution of the whole external mold becomes uniform. Meanwhile, the bent water channel 2 is longer than the total length of the straight water channel, so that the heat transfer and cooling speed is higher, the metallographic structure of the piston can be refined by the faster heat transfer and cooling, and the material performance is better. And at the later stage of piston blank solidification, the outer die is not filled with water, and then the outer die is heated properly, so that the purpose of avoiding the over-low temperature of the outer die and avoiding the defects of casting cold shut and the like of the next piston blank is realized.
Specifically, the bent waterway 2 includes a middle waterway 21, a front waterway 22, and a rear waterway 23. The one side that definition mould body 1 is close to inside runner 12 is preceding, the one side that is close to inside cylinder die cavity 11 is the back, two sides between preceding and the back are the side, middle part water course 21 level sets up, be on a parallel with the diameter of cylinder die cavity 11, and the one end of middle part water course 21 is located inside mould body 1, the opening of the other end is located the back of mould body 1, along being on a parallel with cylinder die cavity 11 diameter drilling to the front in the course of working promptly by the back of mould body 1, the opening of drilling is located the back, the terminal point of drilling is located inside mould body 1, the one end opening, one end is sealed.
Front end water channel 22 level sets up and intersects with middle part water channel 21, front end water channel 22 is located same horizontal plane with middle part water channel 21 promptly, front end water channel 22's one end is located inside mould body 1, the other end opening is located the side of mould body 1, front end water channel 22's middle part intercommunication middle part water channel 21 is located the inside one end of mould body 1, by the side of mould body 1 inside drilling in the course of working promptly, the opening of drilling is located the side, the open-ended terminal point is located inside mould body 1, the in-process of drilling simultaneously is through middle part water channel 21 and middle part water channel intercommunication.
Rear end water channel 23 level sets up and intersects with middle part water channel 21, rear end water channel 23 is located same horizontal plane with middle part water channel 21 promptly, the one end of rear end water channel 23 is located inside mould body 1, the other end opening is located the side of mould body 1, the middle part of rear end water channel 23's middle part intercommunication middle part water channel 21, drill hole to inside by the side of mould body 1 in the course of working promptly, the opening of drilling is located the side, the open-ended terminal point is located inside mould body 1, the in-process of drilling simultaneously is through middle part water channel 21 and middle part water channel intercommunication, the opening of front end water channel 22 is in front of rear end water channel 23. Plugs 4 are arranged at the openings of the middle water channel 21, the front water channel 22 and the rear water channel 23 on the surface of the mould, so that the three parts form a sequentially connected bent water channel 1.
In order to realize the inlet and outlet of cooling water, the water inlet channel 24 and the water outlet channel 25 are further included, the water inlet channel 24 is horizontally arranged and perpendicular to the middle water channel 21, namely the water inlet channel 24 and the middle water channel 21 are located in the same horizontal plane, one end of the water inlet channel 24 is communicated with one end of the front end water channel 22 located inside the die body 1, the other end of the water inlet channel 24 is opened and located on the side face of the die body 1 and communicated with the outside, and in the machining process, holes are drilled from the side face of the die body 1 to the inside until the side face of the front end water channel 22 is drilled to.
The water outlet channel 25 is parallel to the middle water channel 21, namely the water outlet channel 25 and the middle water channel 21 are located in the same horizontal plane, one end of the water outlet channel 25 is communicated with one end of the rear water channel 23 located inside the die body 1, the other end of the water outlet channel 25 is open and located behind the die body 1 and is communicated with the outside, and in the machining process, holes are drilled from the back of the die body 1 to the inside until the holes reach the closed end of the rear water channel 23 and are communicated with the rear water channel 23. In the cooling process, cooling water enters from the water inlet channel 24, flows through the front end water channel 22, the middle water channel 21 and the rear end water channel 23 in sequence, and finally flows out from the water outlet channel 25 to finish cooling.
The distance between the surface opening ends of the front end water channel 22 and the rear end water channel 23 is smaller than that of the inner end, namely, the inner side profiles of the middle water channel 21, the front end water channel 22 and the rear end water channel 23 are trapezoidal, the part of the middle water channel 21 between the front end water channel 22 and the rear end water channel 23 is a trapezoidal short side, the connecting line of the closed end of the front end water channel 22 and the rear end water channel 23 in the mold body 1 is a trapezoidal long side, and the front end water channel 22 and the rear end water channel 23 are two trapezoidal waists. The outline of the two symmetrically arranged bent water channels 2 is approximately a regular hexagon. The arrangement mode, the shape and the structure of the water channel can be adjusted according to the situation, and the like, and the water channel is within the protection scope of the invention.
In order to improve the cooling effect, a plurality of groups of paired bent water channels 2 can be further arranged, and the plurality of groups of bent water channels 2 are sequentially arranged along the vertical direction.
On the basis of the outer mold provided by each embodiment, two U-shaped water channels 3 located at two sides of the pouring gate 12 are symmetrically arranged inside the mold body 1, the middle of each U-shaped water channel 3 is vertically arranged and located on the side surface of the pouring gate 12 and close to the pouring gate 12, and two ends of each U-shaped water channel 3 are bent towards the front of the mold body 1 and communicated with the outside. Can be to the higher local cooling around watering 12 of external mold upper temperature for the external mold temperature is more even, is favorable to the piston blank to solidify from bottom to top in proper order, can eliminate 12 thermal junctions of watering and thereby eliminate the piston excircle shrinkage porosity, and helps piston blank evenly cooling all around, two U type water courses 3 let in the cooling water and cool down around watering 12, make the molten metal in watering 12 solidify rapidly, and solidify in the cylinder die cavity 11 in advance, after the water pipe is led to the U type water course 3 cooling, the water course 2 of buckling begins to let in the cooling water.
Specifically, the U-shaped waterway 3 includes a vertical waterway 31, an upper end waterway 32, and a lower end waterway 33. Vertical water course 31 is located the side of watering 12 and is close to watering 12, and for vertical setting, the lower extreme of vertical water course 31 is located inside mould body 1, and the opening of upper end is located mould body 1 the higher authority and is provided with end cap 4, by the vertical drilling downwards of the higher authority of mould body 1 in the course of working, one end opening, one end is sealed, and the open end is with end cap 4 shutoff.
The upper end water channel 32 is horizontally arranged and intersected with the vertical water channel 31, the upper end water channel 32 and the vertical water channel 31 are located in the same vertical plane, one end of the upper end water channel 32 is communicated with the middle of the vertical water channel 31, the opening of the other end of the upper end water channel is located in front of the die body 1 and communicated with the outside, and in the machining process, the front horizontal surface of the die body 1 is drilled inwards until the middle of the vertical water channel 32 is communicated.
Lower extreme water course 33 level setting and with vertical water course 31 alternately, lower extreme water course 332 is located same vertical plane with vertical water course 31, the lower extreme of vertical water course 31 of one end intercommunication of lower extreme water course 33, and other end opening is located the preceding of mould body 1 and communicates the external world, and in the course of working, by the preceding level of mould body 1 drilling inwards, until the lower extreme of communicating vertical water course 32. In the cooling process, cooling water sequentially passes through the upper end water channel 32, the vertical water channel 31 and the lower end water channel 33 to finish cooling. The inclination angle of each water channel can be adjusted according to the situation, and the invention is within the protection scope.
In the external mold provided by the specific embodiment of the invention, the mold body 1 comprises two half molds which are arranged in bilateral symmetry, the two bent water channels 2 are respectively arranged in the two half molds, and the two U-shaped water channels 3 are respectively arranged in the two half molds.
In addition to the above outer mold, the specific embodiment of the present invention further provides a piston casting apparatus including the above outer mold, and the structure of other parts of the piston casting apparatus is referred to the prior art and is not described herein again.
The specific embodiment of the invention also provides a cooling method of the piston casting equipment, which comprises the following steps:
and after the casting is finished, cooling water is introduced into the U-shaped water channels 3 at the two sides of the pouring channel 12 through the first preset time length A so as to cool the pouring channel 12, wherein the water introduction time is a second preset time length B. Wherein, A is (0-0.2) T, B is (0.2-0.5) T, T is the total solidification time of the casting and is calculated according to the size of the casting and the concrete structure of the die.
Namely, after the casting is finished, cooling water is introduced into the bent water channels 2 on the two sides of the cylindrical cavity 11 within a preset time C so as to cool the cylindrical cavity 11. The water passing time is a third preset time length D, C is (0.2-0.7) T, and D is (0.2-0.5) T.
The A, B, C, D time periods are just for helping the group to understand the sequence of the water-passing time, and can be adjusted to a certain extent according to different die structures or special requirements of piston castings.
The piston casting apparatus, the outer mold thereof and the cooling method thereof according to the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The outer die of the piston casting equipment comprises a die body (1), wherein a vertical cylindrical cavity (11) for forming the outside of a piston and a pouring channel (12) communicated with the cylindrical cavity (11) are arranged inside the die body (1), and the outer die is characterized in that two bending water channels (2) surrounding the cylindrical cavity (11) are symmetrically arranged inside the die body (1), the middle parts of the bending water channels (2) are parallel to the diameter of the cylindrical cavity (11), and two ends of each bending water channel (2) are bent inwards and are close to the cylindrical cavity (11);
the bent water channel (2) comprises a middle water channel (21), a front end water channel (22) and a rear end water channel (23); the middle water channel (21) is parallel to the diameter of the cylindrical cavity (11), one end of the middle water channel (21) is positioned in the die body (1), and the opening of the other end of the middle water channel is positioned behind the die body (1);
the front end water channel (22) is horizontally arranged and is intersected with the middle water channel (21), one end of the front end water channel (22) is positioned in the die body (1), the other end of the front end water channel is opened on the side surface of the die body (1), and the middle of the front end water channel (22) is communicated with one end of the middle water channel (21) positioned in the die body (1);
the rear end water channel (23) is horizontally arranged and is crossed with the middle water channel (21), one end of the rear end water channel (23) is positioned in the die body (1), the other end of the rear end water channel is provided with an opening and is positioned on the side surface of the die body (1), and the middle part of the rear end water channel (23) is communicated with the middle part of the middle water channel (21);
plugs (4) are arranged at openings of the middle water channel (21), the front end water channel (22) and the rear end water channel (23) on the surface of the mould;
the die is characterized in that two U-shaped water channels (3) located at two sides of a pouring gate (12) are symmetrically arranged inside the die body (1), the middle of each U-shaped water channel (3) is vertically arranged and located on the side face of the pouring gate (12) and close to the pouring gate (12), and two ends of each U-shaped water channel (3) are bent in front of the die body (1) and communicated with the outside.
2. The external mold according to claim 1, characterized by further comprising a water inlet channel (24) and a water outlet channel (25), wherein the water inlet channel (24) is horizontally arranged and perpendicular to the middle water channel (21), one end of the water inlet channel (24) is communicated with one end of the front water channel (22) in the mold body (1), and the other end is opened on the side of the mold body (1) and is communicated with the outside;
the water outlet channel (25) is parallel to the middle water channel (21), one end of the water outlet channel (25) is communicated with one end, located in the die body (1), of the rear end water channel (23), and the other end of the water outlet channel is opened and located behind the die body (1) and communicated with the outside.
3. The overmold according to claim 2, wherein the distance of the front end water channel (22) and the rear end water channel (23) surface open ends is smaller than the distance of the inner ends.
4. The outer die according to claim 3, characterized by comprising a plurality of groups of the bent water channels (2) arranged in pairs, wherein the plurality of groups of the bent water channels (2) are arranged in sequence along the vertical direction.
5. The overmold according to claim 1, characterized in that the U-shaped water channel (3) comprises a vertical water channel (31), an upper end water channel (32) and a lower end water channel (33); the vertical water channel (31) is positioned on the side surface of the pouring gate (12) and close to the pouring gate (12), the lower end of the vertical water channel (31) is positioned in the die body (1), and an opening at the upper end of the vertical water channel is positioned above the die body (1) and is provided with a plug (4);
the upper end water channel (32) is horizontally arranged and is crossed with the vertical water channel (31), one end of the upper end water channel (32) is communicated with the middle part of the vertical water channel (31), and the opening of the other end of the upper end water channel is positioned in front of the die body (1) and is communicated with the outside;
the lower end water channel (33) is horizontally arranged and intersected with the vertical water channel (31), one end of the lower end water channel (33) is communicated with the lower end of the vertical water channel (31), and the opening of the other end of the lower end water channel is positioned in front of the die body (1) and communicated with the outside.
6. The external mold according to claim 5, characterized in that the mold body (1) comprises two half molds symmetrically arranged left and right, two of the bent water channels (2) are respectively arranged in the two half molds, and two of the U-shaped water channels (3) are respectively arranged in the two half molds.
7. A piston casting apparatus comprising an outer mould and an inner mould, characterised in that the outer mould body is an outer mould as claimed in any one of claims 1 to 6.
8. A method of cooling a piston casting apparatus, in particular a piston casting apparatus as claimed in claim 7, comprising the steps of:
after the casting is finished, cooling water is introduced into the U-shaped water channels (3) on the two sides of the pouring gate (12) after a first preset time;
cooling water is introduced into the bent water channels (2) on two sides of the cylindrical cavity (11) immediately after the U-shaped water channel (3) is introduced with the cooling water for a second preset time;
and cooling water for a third preset time is introduced into the bent water channel (2), so that the outer die (1) is cooled to a required range.
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| CN201811398749.0A CN109332603B (en) | 2018-11-22 | 2018-11-22 | Piston casting equipment and outer die and cooling method thereof |
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| CN201811398749.0A CN109332603B (en) | 2018-11-22 | 2018-11-22 | Piston casting equipment and outer die and cooling method thereof |
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| CN109332603B true CN109332603B (en) | 2020-02-18 |
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| JPS5348931A (en) * | 1976-10-18 | 1978-05-02 | Hitachi Shipbuilding Eng Co | Method of manufacturing copper plate for mold to be used for continuous casting equipment |
| CN101480700B (en) * | 2009-01-23 | 2011-04-06 | 安徽省恒泰活塞制造有限公司 | Aluminum piston bottom riser head shrink-compensating casting technique |
| CN202763020U (en) * | 2012-10-15 | 2013-03-06 | 邢台市科业工贸有限公司 | Bolster cooling mechanism of piston casting machine |
| CN203737955U (en) * | 2013-12-25 | 2014-07-30 | 无锡华星机电制造有限公司 | Water-cooled engine piston mold |
| CN105665683B (en) * | 2016-03-24 | 2017-09-29 | 中国北方发动机研究所(天津) | A kind of piston pouring device of local high strengthening cooling |
| CN206296425U (en) * | 2016-11-23 | 2017-07-04 | 日照金港活塞有限公司 | A kind of quick cooling Piston mould |
| CN108453231B (en) * | 2018-02-01 | 2020-07-24 | 浙江博德智能科技有限公司 | Shape-following cold control mold and using method thereof |
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| CN109332603A (en) | 2019-02-15 |
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