CN111906250B - Die and method for eliminating air holes in lead parts - Google Patents
Die and method for eliminating air holes in lead parts Download PDFInfo
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- CN111906250B CN111906250B CN202010573743.3A CN202010573743A CN111906250B CN 111906250 B CN111906250 B CN 111906250B CN 202010573743 A CN202010573743 A CN 202010573743A CN 111906250 B CN111906250 B CN 111906250B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/065—Cooling or heating equipment for moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
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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
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
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Abstract
The invention provides a die and a method for eliminating internal air holes of a lead part, belonging to the technical field of lead part processing, and the die for eliminating the internal air holes of the lead part comprises a top plate, a die body and a bottom plate, wherein the top plate is respectively provided with a pouring gate and a dead head; the die body is arranged at the bottom of the top plate, and a first cavity communicated with the riser and a first flow channel communicated with the sprue are arranged in the die body; the bottom plate is arranged at the bottom of the die body, a second cavity communicated with the first cavity and a second flow channel communicated with the first flow channel are arranged in the bottom plate, and one end of the second flow channel is communicated with the bottom of the second cavity; the first cavity and the second cavity form a cavity, and the first runner and the second runner form a pouring gate for casting the lead part. The mould for eliminating the air holes in the lead part has stable mould filling, and effectively prevents air holes from being generated in the lead part due to the air left in the cavity.
Description
Technical Field
The invention belongs to the technical field of lead part processing, and particularly relates to a die and a method for eliminating internal air holes of a lead part.
Background
The lead parts are an important component in the lead-acid storage battery, and the lead parts are used for fixing the single-cell batteries in series to form an internal circuit of the battery and serve as a leading-out terminal of current.
At present, in the storage battery manufacturing industry, a gravity casting process is generally adopted for producing internal lead parts, internal air holes are easy to appear on the lead parts produced by the method, and gas is not discharged in time before molten metal is solidified, so that the defects of holes generated in castings are overcome. Once the lead part with the defects is used in a battery product, the effective bearing area of the lead part is reduced due to the air holes in the lead part, so that the resistance is increased, the voltage drop is further influenced, and even the lead part is fused; and lead parts with internal pore defects have low compactness and poor impact resistance and can be broken under severe vibration.
Disclosure of Invention
The invention aims to provide a die and a method for eliminating air holes in a lead part, and aims to solve the technical problems that the resistance is increased and the impact resistance is poor due to the fact that air holes are easy to appear in the lead part manufactured by the existing gravity pouring mode.
In order to achieve the purpose, the invention adopts the technical scheme that: the mould for eliminating the internal air holes of the lead parts comprises:
the top plate is respectively provided with a pouring gate and a dead head;
the die body is arranged at the bottom of the top plate, a first cavity which is positioned at the bottom of the riser and is communicated with the riser is arranged in the die body, and a first flow channel which is positioned at the bottom of the pouring gate and is communicated with the pouring gate is also arranged in the die body; and
the bottom plate is arranged at the bottom of the die body, a second cavity which is positioned at the bottom of the first cavity and is communicated with the first cavity is arranged in the bottom plate, a second flow channel which is positioned at the bottom of the first flow channel and is communicated with the first flow channel is also arranged in the bottom plate, and one end of the second flow channel is communicated with the bottom of the second cavity;
the first cavity and the second cavity form a cavity for forming a lead part, and the first runner and the second runner form a pouring gate for casting the lead part.
As another embodiment of the present application, the mold bodies are clearance-fitted with the top plate and the bottom plate, respectively.
As another embodiment of the present application, an exhaust groove with an upward opening is formed in the top of the mold body, and an exhaust groove with a downward opening is formed in the bottom of the mold body.
As another embodiment of the application, at least the top of the connecting part of the pouring channel and the cavity is transited through a circular arc chamfer.
The mould for eliminating the internal air holes of the lead parts has the advantages that: compared with the prior art, the die for eliminating the air holes in the lead parts is characterized in that the top plate, the die body and the bottom plate are installed before use, then the molten raw materials are poured into the die through the pouring gate, the molten raw materials sequentially pass through the first flow channel and the second flow channel and reach the bottom of the second cavity, the liquid level of the molten raw materials in the second cavity gradually rises to enter the first cavity along with the gradual increase of the poured molten raw materials until the amount of the molten raw materials exceeds the top surface of the first cavity, the casting is stopped, and the die is opened after standing and cooling to form the required lead parts. The mould for eliminating the air holes in the lead part firstly enters the bottom of the cavity in the process of feeding the casting raw materials into the cavity, then the molten raw materials gradually rise along with the increase of the injection amount in the cavity, the riser is used for discharging the involved gas and the reactive gas in the cavity, the mould filling is stable, and the air holes in the lead part caused by the air left in the cavity are effectively prevented.
The invention also provides a method for eliminating the internal air holes of the lead parts, which is implemented by the die for eliminating the internal air holes of the lead parts and comprises the following steps:
heating the raw materials to a first preset temperature to melt the raw materials;
preheating a mould until the mould is preheated to a second preset temperature;
pouring the raw material in a molten state into the mold from the sprue until the cavity is filled with the raw material in the molten state;
cooling the molten feedstock within the cavity;
and (5) separating the mould, taking the workpiece, and processing to obtain the lead part.
As another embodiment of the present application, the first predetermined temperature is 420 to 450 ℃.
As another embodiment of the present application, the second predetermined temperature is 150 ℃ to 210 ℃.
As another embodiment of the present application, preheating the mold until the mold is preheated to a second preset temperature specifically includes:
heating the mold until the maximum temperature outside the mold exceeds the second preset temperature, and then stopping heating;
and preserving heat of the die until the overall temperature of the die is uniform and reaches the second preset temperature.
As another embodiment of the present application, preheating the mold until the mold is preheated to a second preset temperature specifically includes:
and heating the die until the integral temperature of the die reaches the second preset temperature, and then stopping heating.
As another embodiment of the present application, the raw material and the mold are heated in a lead pan.
The method for eliminating the internal air holes of the lead parts has the advantages that: compared with the prior art, the method for eliminating the air holes in the lead parts comprises the following steps: heating the raw material to a first preset temperature to melt the raw material; preheating the mould until the mould is preheated to a second preset temperature; pouring the molten raw material into a mould from a pouring gate until the molten raw material fills the cavity; cooling the molten raw material in the cavity; and (5) separating the mould, taking the workpiece, and processing to obtain the lead part. The method for eliminating the internal pores of the lead part preheats the die, eliminates the temperature difference between the die and the molten raw material, and reduces the generation of reactive gas; in the process of casting the molten raw material, the molten raw material firstly enters the bottom of the cavity, then the liquid level gradually rises along with the increase of the injection amount in the cavity, the air in the cavity is discharged from a riser, the air in the cavity can be fully discharged in the mode of the casting mode, the mold filling is stable, and the air left in the cavity is effectively prevented from causing air holes in the lead part.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic cross-sectional structural diagram of a mold for eliminating air holes in lead parts according to an embodiment of the present invention;
fig. 2 is a schematic top view of a mold for eliminating air holes in lead parts according to an embodiment of the present invention;
fig. 3 is a use state diagram of the mold for eliminating the internal air holes of the lead part according to the embodiment of the invention.
In the figure: 1. a top plate; 2. a mold body; 3. a base plate; 4. a riser; 5. a gate; 6. a first cavity; 7. a second cavity; 8. a cavity; 9. a first flow passage; 10. a second flow passage; 11. a pouring channel; 12. an exhaust groove; 13. chamfering with an arc; 14. a first wrench; 15. a second wrench; 16. and a positioning column.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to fig. 3, the mold for eliminating the internal air holes of the lead component according to the present invention will now be described. The mould for eliminating the air holes in the lead parts comprises a top plate 1, a mould body 2 and a bottom plate 3, wherein a pouring gate 5 and a dead head 4 are respectively arranged on the top plate 1; the mold body 2 is arranged at the bottom of the top plate 1, a first cavity 6 which is positioned at the bottom of the riser 4 and communicated with the riser 4 is arranged in the mold body 2, and a first flow channel 9 which is positioned at the bottom of the sprue 5 and communicated with the sprue 5 is also arranged; the bottom plate 3 is arranged at the bottom of the die body 2, a second cavity 7 which is positioned at the bottom of the first cavity 6 and communicated with the first cavity 6 is arranged in the bottom plate 3, a second flow channel 10 which is positioned at the bottom of the first flow channel 9 and communicated with the first flow channel 9 is also arranged, and one end of the second flow channel 10 is communicated with the bottom of the second cavity 7; the first cavity 6 and the second cavity 7 form a cavity 8 for forming a lead part, and the first flow passage 9 and the second flow passage 10 form a pouring gate 11 for casting the lead part.
Compared with the prior art, the die for eliminating the internal air holes of the lead parts is characterized in that the top plate 1, the die body 2 and the bottom plate 3 are installed before the die for eliminating the internal air holes of the lead parts is used, then molten raw materials are poured into the die through the pouring gate 5, the molten raw materials sequentially pass through the first flow channel 9 and the second flow channel 10 and reach the bottom of the second cavity 7, the liquid level of the molten raw materials in the second cavity 7 gradually rises to enter the first cavity 6 along with the gradual increase of the poured molten raw materials until the liquid level exceeds the top surface of the first cavity 6, the die stops casting, and the die is opened after standing and cooling to form the required lead parts. The mould for eliminating the air holes in the lead part firstly enters the bottom of the cavity 8 in the process of feeding the casting raw material into the cavity 8, then the molten raw material gradually rises along with the increase of the injection amount in the cavity 8, the involved gas and the reactive gas in the cavity 8 are discharged through the riser 4, the mould filling is stable, and the air holes in the lead part caused by the air left in the cavity 8 are effectively prevented.
As a specific embodiment of the mold for eliminating the internal air holes of the lead parts provided by the present invention, referring to fig. 1 to 3, one or more cavities 8 are provided, and when one cavity 8 is provided, one riser 4 is provided and located at the top of the cavity 8; when a plurality of cavities 8 are provided, the number of risers 4 corresponds to the number of cavities 8, and the top of each cavity 8 corresponds to one riser 4 communicated with the cavity. The arrangement of the cavity 8 is beneficial to casting and forming, and the forming quality of the lead part is improved; the plurality of cavities 8 are arranged, so that batch production can be met, and the production efficiency is improved.
In this embodiment, when the number of the cavities 8 is plural, the number of the corresponding gates 5 and runners 11 is plural, and one or a row of cavities 8 corresponds to one gate 5 and runner 11, which is beneficial to uniform casting of each cavity 8.
Referring to fig. 1 to 2, a mold for eliminating internal pores of a lead part according to an embodiment of the present invention is provided, wherein the riser 4 is cylindrical. Preferably, the diameter of the feeder 4 is 4mm, and the straight discharge of the gas in the cavity 8 from the top is facilitated by the cylindrical feeder 4, while the entry of other impurities is prevented.
In the present embodiment, the cross-sectional shape of the gate 5 is a trapezoid having a wide top and a narrow bottom. The gate 5 may be a cone or a multi-faceted cone; preferably, the width of the top of the gate 5 is 8cm, the width of the bottom of the gate is 1cm, and when the lead part is cast, molten lead alloy is poured onto the inclined surface of the gate 5 and then flows into the pouring channel 11 along the side wall, so that bubbles generated due to impact force when the molten lead alloy is directly poured into the pouring channel 11 are effectively prevented, and the generation of bubbles in the lead part is prevented.
Specifically, the pouring gate 11 can be divided into a vertical pouring gate and a horizontal pouring gate, the vertical pouring gate is communicated with the pouring gate 5, one end of the horizontal pouring gate is communicated with one end of the vertical pouring gate, and the other end of the horizontal pouring gate is communicated with the bottom of the cavity 8; the pouring gate 11 can also be in an arc shape in the distribution direction, one end of the pouring gate is communicated with the pouring gate 5, and the other end of the pouring gate is communicated with the bottom of the cavity 8; in summary, regardless of the distribution direction shape of the runner 11, one end is always in communication with the gate 5 and the other end is in communication with the bottom of the cavity 8.
Referring to fig. 1 to 2, as an embodiment of the mold for eliminating the internal air holes of the lead part, referring to fig. 1 to 2, a mold body 2 is in clearance fit with a top plate 1 and a bottom plate 3, respectively. Specifically, there is 0.1 ~ 0.3 mm's gap between the upper surface of die body 2 and the lower surface of roof 1, there is 0.1 ~ 0.3 mm's gap between the lower surface of die body 2 and the upper surface of bottom plate 3, through the clearance fit between die body 2 and roof 1 and bottom plate 3, can realize the preliminary exhaust to die cavity 8 at the casting in-process, simultaneously 0.1 ~ 0.3mm can not make the lead part produce quality problems such as overlap burr again, be favorable to improving the shaping quality of lead part.
Referring to fig. 1 to 3, as an embodiment of the mold for eliminating the internal air holes of the lead part, an air discharge groove 12 with an upward opening is formed at the top of the mold body 2, and an air discharge groove 12 with a downward opening is formed at the bottom of the mold body 2. Preferably, the exhaust duct 12 is a long-shaped duct with a triangular cross section, the exhaust duct 12 is uniformly provided with a plurality of ducts along a preset path, air in the cavity 8 firstly enters a gap between the die body 2 and the top plate 1 or the bottom plate 3, and then the air is exhausted through the exhaust duct 12, the flow area of the air exhausted from the cavity 8 can be increased due to the arrangement of the exhaust duct 12, and the air exhaust efficiency in the cavity 8 is improved.
The cross-sectional area of the exhaust groove 12 is 0.6-1 mm in height, the base angle (an included angle far away from the upper surface or the lower surface of the die body 2) is 60-90 degrees, the exhaust groove 12 with the size can prevent quality defects such as flash and burr generated by lead drilling, and the casting quality of lead parts is improved.
Referring to fig. 1, at least the top of the connection between the runner 11 and the cavity 8 is transited by an arc chamfer 13. When the distance between the bottom or the periphery of the cavity 8 and the runner 11 is too large, the arc chamfer 13 can be arranged, and when the distance is not too large, the arc chamfer 13 can not be arranged; if the connection part of the pouring gate 11 and the cavity 8 is an edge angle, the size of the connection part can be changed rapidly when molten lead alloy is poured, so that internal stress is generated on a lead part; preferably, the size of the arc chamfer 13 is R5, the arc chamfer 13 can prevent the defect of internal stress caused by the rapid size change, and meanwhile, the arc chamfer 13 arranged at the position can make the flow of molten lead alloy more smooth and not easy to trap air. Optionally, the joints of the pouring channels 11 and the cavity 8 are all transited through circular-arc chamfers.
Referring to fig. 1 to 3, as an embodiment of the mold for eliminating the internal air holes of the lead part provided by the present invention, a first wrench 14 is disposed on a side surface of the top plate 1, and a second wrench 15 is disposed on a side surface of the mold body 2. After the mold is cooled and formed, the first wrench 14 and the second wrench 15 can be pulled reversely in the horizontal direction to form a transverse shearing force, so that the excess materials at the riser 4 and the sprue 5 can be removed, the mold can be smoothly demolded, and the operation steps are simplified.
Referring to fig. 1, a positioning column 16 is disposed at the top of the bottom of the mold body 2, and a positioning hole for engaging with the positioning column 16 is disposed on the mold body 2. When the installation, with locating hole and the cooperation of reference column 16 on the die body 2, then carrying out the installation of peripheral fastener, easy to assemble reduces the debugging of die body 2 position, can guarantee that first cavity 6 aligns with second cavity 7, guarantees the integrality of die cavity 8, is favorable to the casting of plumbous part.
The invention also provides a method for eliminating the internal air holes of the lead parts, which is implemented by the die for eliminating the internal air holes of the lead parts. Referring to fig. 1 to 2, a method for eliminating air holes inside a lead component includes the following steps:
heating the raw materials to a first preset temperature to melt the raw materials;
preheating a mould (the mould is the mould for eliminating the internal air holes of the lead part, and the mould is the same as the mould) until the mould is preheated to a second preset temperature;
pouring the molten raw material into the mould from the sprue 5 until the molten raw material fills the cavity 8;
cooling the molten raw material in the cavity 8;
and (5) separating the mould, taking the workpiece, and processing to obtain the lead part.
Compared with the prior art, the method for eliminating the internal air holes of the lead parts comprises the following steps: heating the raw material to a first preset temperature to melt the raw material; preheating the mould until the mould is preheated to a second preset temperature; pouring the molten raw material into the mould from the sprue 5 until the molten raw material fills the cavity 8; cooling the molten raw material in the cavity 8; and (5) separating the mould, taking the workpiece, and processing to obtain the lead part. The method for eliminating the internal pores of the lead part preheats the die, eliminates the temperature difference between the die and the molten raw material, and reduces the generation of reactive gas; in the process of casting the molten raw material, the molten raw material firstly enters the bottom of the cavity 8, then the liquid level gradually rises along with the increase of the injection amount in the cavity 8, the air in the cavity 8 is discharged from the riser 4, the air in the cavity 8 can be fully discharged in the casting mode, the mold filling is stable, and the air left in the cavity 8 is effectively prevented from causing air holes in the lead part.
As a specific embodiment of the method for eliminating the internal pores of the lead part provided by the present invention, the first preset temperature is 420 ℃ to 450 ℃. When the melting temperature of the lead alloy is low, the dissolution of alloy elements and the discharge of gas and impurities are not facilitated, and the gas cannot be completely discharged, so that air holes are generated in the lead part; the lead alloy has the disadvantages that the lead alloy has too high melting temperature, long incineration time is required, the waste of resources is caused, and the lead alloy in a molten state with too high melting temperature can cause too much hydrogen absorption and serious oxidation; the lead alloy at the temperature of 420-450 ℃ can be beneficial to dissolving alloy elements, can effectively remove gas and impurities in the lead alloy, saves resources, and simultaneously ensures low oxidizability, thereby improving the forming quality of lead parts.
As a specific embodiment of the method for eliminating the internal pores of the lead part provided by the present invention, the second preset temperature is 150 ℃ to 210 ℃. The second preset temperature is lower than the temperature of the molten-state lead alloy, but is not too different from the temperature of the molten-state lead alloy, so that energy loss during heating of the die can be reduced, and the phenomenon that cracks are generated in the die in the casting process to influence the forming quality of the lead part is prevented.
As a specific embodiment of the method for eliminating the internal pores of the lead part provided by the present invention, preheating the mold until the mold is preheated to a second preset temperature specifically includes:
heating the mold until the maximum temperature outside the mold exceeds a second preset temperature, and then stopping heating;
and preserving heat of the die until the integral temperature of the die is uniform and reaches a second preset temperature.
The mould can adopt higher temperature to heat when preheating, after heating for a certain period, the temperature of mould periphery is higher, probably lead alloy still will melt a period of time this moment, in order to make the holistic temperature of mould even and be in 150 ℃ -210 ℃, can adopt asbestos cloth or glass cloth parcel aluminium hydroxide heat preservation cotton to keep warm, the outside temperature of mould at this moment is inside transmission gradually for mould outside temperature reduces, and inside temperature risees, until the mould wholly reaches the second and predetermines the temperature. The uniformity of the overall temperature of the die can be ensured through heat preservation.
As a specific embodiment of the method for eliminating the internal pores of the lead part provided by the present invention, preheating the mold until the mold is preheated to a second preset temperature specifically includes:
and heating the die until the integral temperature of the die reaches a second preset temperature, and then stopping heating.
The mould can adopt lower programming rate to heat when preheating, reduces the inside and outside difference in temperature of mould, prevents that the inside crack that produces of mould from influencing the shaping quality of plumbous part, can also make the mould wholly heat up, guarantees the homogeneity of mould bulk temperature.
In the embodiment, the die is preheated after the lead alloy is melted for a period of time, so that the temperature of the die is just 150-210 ℃ after the lead alloy is melted, the die is not required to be insulated, the molten lead alloy is directly cast, the insulation step of the die is omitted, the production step is simplified, and the labor intensity is reduced.
As a specific implementation mode of the method for eliminating the internal pores of the lead parts, the raw materials and the die are heated in a lead pot. The middle part of the lead pan is an incinerator, the edge of the lead pan is a platform, the mold is placed on the platform at the opening and closing position of the lead pan, the mold is heated through the real-time waste heat generated when raw materials (lead alloy) are melted, the mold is taken out after 10min and is kept warm, the lead alloy is continuously melted to 420-450 ℃, then casting is carried out, the raw materials and the mold are simultaneously heated through the lead pan, the energy loss can be reduced, and the manufacturing steps are simplified.
As a specific embodiment of the method for eliminating the internal pores of the lead part, the method for cooling the molten raw material in the cavity 8 specifically comprises the following steps:
and (5) placing the cast mould in a natural environment for cooling.
The existing cooling mode for the mold is cooling by blowing air, so that although the cooling efficiency is improved, the surface of the mold is omitted and uneven by blowing air for cooling, or the mold is cracked or deformed, so that the service life of the mold is influenced; the die is placed in a cool place for standing and cooling, so that the damage of the die can be reduced, and the service life of the die is prolonged.
The method for eliminating the internal air holes of the lead parts comprises the following steps:
melting lead alloy in a lead pot, wherein the melting temperature is 420-450 ℃;
according to the drawing size of the lead part, a cavity 8 of the lead part is formed in the bottom plate 3 and the die body 2, and the whole set of die is assembled;
putting the assembled die into a lead pan for preheating for 10min, taking out and putting on a workbench for later use, and preserving heat at 150-210 ℃;
pouring liquid lead alloy on the inclined surface of the pouring gate 5 and entering the pouring gate 11 along the side wall;
the liquid lead alloy enters the bottom of the pouring gate 11 along the side wall of the pouring gate 11 and then enters the cavity 8 from the side surface, the liquid lead alloy returns from bottom to top in the cavity 8, and the involved gas and the reactive gas in the cavity 8 are discharged from the riser 4;
cooling in natural environment after casting;
reverse wrenches the first 14 and second 15 wrenches cut off the excess material in the riser 4 and the sprue 5;
opening the mould and taking out the lead parts;
the "toe" from solidified runner 11 is cut off with offset pliers.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Eliminate mould of inside gas pocket of lead part, its characterized in that includes:
the top plate is respectively provided with a pouring gate and a dead head;
the die body is arranged at the bottom of the top plate, a first cavity which is positioned at the bottom of the riser and is communicated with the riser is arranged in the die body, and a first flow channel which is positioned at the bottom of the pouring gate and is communicated with the pouring gate is also arranged in the die body; and
the bottom plate is arranged at the bottom of the die body, a second cavity which is positioned at the bottom of the first cavity and is communicated with the first cavity is arranged in the bottom plate, a second flow channel which is positioned at the bottom of the first flow channel and is communicated with the first flow channel is also arranged in the bottom plate, and one end of the second flow channel is communicated with the bottom of the second cavity;
the first cavity and the second cavity form a cavity for forming a lead part, and the first runner and the second runner form a pouring gate for casting the lead part;
the cross section of the sprue is in a trapezoid shape with a wide upper part and a narrow lower part;
the side of roof is equipped with first spanner, the side of die body is equipped with the second spanner, first spanner with the second spanner can reverse be pulled, forms horizontal shearing force.
2. The mold for eliminating internal voids of lead parts according to claim 1, wherein said mold body is in clearance fit with said top plate and said bottom plate, respectively.
3. The mold for eliminating air holes in lead parts according to claim 2, wherein the top of the mold body is provided with an upward opening air vent groove, and the bottom of the mold body is provided with a downward opening air vent groove.
4. The mold for eliminating the internal pores of the lead parts according to claim 1, wherein at least the top of the connecting part of the pouring channel and the cavity is transited by a circular arc chamfer.
5. The method for eliminating the internal pores of the lead parts is implemented by the mould for eliminating the internal pores of the lead parts according to any one of claims 1 to 4, and comprises the following steps:
heating the raw materials to a first preset temperature to melt the raw materials;
preheating a mould until the mould is preheated to a second preset temperature;
pouring the raw material in a molten state into the mold from the sprue until the cavity is filled with the raw material in the molten state;
cooling the molten feedstock within the cavity;
and (5) separating the mould, taking the workpiece, and processing to obtain the lead part.
6. The method for eliminating the internal porosity of the lead part according to claim 5, wherein the first predetermined temperature is 420 ℃ to 450 ℃.
7. The method for eliminating internal porosity of lead parts according to claim 5, wherein the second predetermined temperature is 150 ℃ to 210 ℃.
8. The method for eliminating the internal pores of the lead part as claimed in claim 5 or 7, wherein the preheating the mold until the mold is preheated to the second preset temperature comprises:
heating the mold until the maximum temperature outside the mold exceeds the second preset temperature, and then stopping heating;
and preserving heat of the die until the overall temperature of the die is uniform and reaches the second preset temperature.
9. The method for eliminating the internal pores of the lead part as claimed in claim 5 or 7, wherein the preheating the mold until the mold is preheated to the second preset temperature comprises:
and heating the die until the integral temperature of the die reaches the second preset temperature, and then stopping heating.
10. The method for eliminating internal porosity of lead parts according to claim 5, wherein the raw material and the mold are heated in a lead pan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010573743.3A CN111906250B (en) | 2020-06-22 | 2020-06-22 | Die and method for eliminating air holes in lead parts |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010573743.3A CN111906250B (en) | 2020-06-22 | 2020-06-22 | Die and method for eliminating air holes in lead parts |
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| CN111906250A CN111906250A (en) | 2020-11-10 |
| CN111906250B true CN111906250B (en) | 2022-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102601349A (en) * | 2012-03-31 | 2012-07-25 | 常熟市兄弟玻璃模具有限公司 | Casting method for glass mould |
| CN103639369A (en) * | 2013-12-25 | 2014-03-19 | 湖南江滨机器（集团）有限责任公司 | Piston casting method and mould |
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| CN109175313A (en) * | 2018-10-30 | 2019-01-11 | 天能电池(芜湖)有限公司 | A kind of weight control method of cast molding |
| CN110947912A (en) * | 2019-11-11 | 2020-04-03 | 安徽力普拉斯电源技术有限公司 | Lead part casting mold |
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2020
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| CN102601349A (en) * | 2012-03-31 | 2012-07-25 | 常熟市兄弟玻璃模具有限公司 | Casting method for glass mould |
| CN103639369A (en) * | 2013-12-25 | 2014-03-19 | 湖南江滨机器（集团）有限责任公司 | Piston casting method and mould |
| CN204892910U (en) * | 2015-09-01 | 2015-12-23 | 宁波市法莱欣科技有限公司 | Wiper linking arm die casting die who contains exhaust nozzle |
| CN106227954A (en) * | 2016-07-27 | 2016-12-14 | 太原理工大学 | A kind of Aluminum alloy gravity gravity die casting process optimization method |
| CN206065380U (en) * | 2016-08-25 | 2017-04-05 | 天能集团江苏特种电源有限公司 | A kind of big close accumulator terminal post mould of portable |
| CN206662206U (en) * | 2017-04-24 | 2017-11-24 | 无锡邦得机械有限公司 | Charge air cooler air chamber mould |
| CN109175313A (en) * | 2018-10-30 | 2019-01-11 | 天能电池(芜湖)有限公司 | A kind of weight control method of cast molding |
| CN110947912A (en) * | 2019-11-11 | 2020-04-03 | 安徽力普拉斯电源技术有限公司 | Lead part casting mold |
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| CN111906250A (en) | 2020-11-10 |
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