CN212216999U - Casting mould - Google Patents
Casting mould Download PDFInfo
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- CN212216999U CN212216999U CN202021853253.0U CN202021853253U CN212216999U CN 212216999 U CN212216999 U CN 212216999U CN 202021853253 U CN202021853253 U CN 202021853253U CN 212216999 U CN212216999 U CN 212216999U
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Abstract
The utility model relates to a casting technology field provides a casting mould, be in including setting up last mould on the mould is inserted, the lower part that goes up the mould and insert is provided with the rising head die cavity, the rising head die cavity with the mould die cavity is linked together, go up the mould insert be provided with the trachea that the rising head die cavity is linked together, trachea one end is located the top of rising head die cavity can let in compressed air, passes through at the cast in-process the intratracheal compressed air that lets in, the upper portion of rising head die cavity form with fill the pressure of the same order of magnitude of mould pressure in the heat preservation stove, continuously form the extrusion effect to the rising head at the in-process that the foundry goods solidifies, transmit the pressure of rising head to distal end defect department through local extruded effect, reach and produce the feeding and eliminate the purpose of defect to defect.
Description
Technical Field
The application relates to the technical field of casting, in particular to a casting mold.
Background
In the development process of modern automobiles, lightweight energy conservation is an important trend, castings are complex in structure and special in shape, a large number of iron castings are replaced by aluminum alloy, and the castings are complex in shape and bring great difficulty to the process. The primary process problem caused by the complicated modeling is the casting defect. The main method for solving the casting defects at present is to optimize the product shape so that the casting can be solidified in sequence, thus the product weight is increased and the development trend of light weight and energy conservation is contrary. In addition, casting defects can be eliminated by feeding the risers, but the casting defects at the position close to the risers can only be solved by using the risers, and the defects at the position far away from the risers can not be eliminated, so that a new breakthrough in the process is required.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a casting mould, which transmits the pressure of a riser to a far-end defect part through the action of local extrusion, so that the defect part is fed and the defect is eliminated.
In order to achieve the above object, the utility model provides a following technical scheme:
the first aspect provides a casting mold, which comprises an upper mold and a lower mold, wherein the upper mold and the lower mold surround a mold cavity, an upper mold insert is arranged on the upper mold, a riser cavity is arranged at the lower part of the upper mold insert, and the riser cavity is communicated with the mold cavity; the upper die insert is provided with an air pipe communicated with the riser cavity, and one end of the air pipe is located at the top of the riser cavity and can be filled with compressed air.
In some embodiments, a vent plug is disposed between the riser cavity and the air tube.
In some embodiments, a one-way valve is disposed on the air tube.
In some embodiments, the cross-section of the riser cavity is tapered with a narrow top and a wide bottom.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a casting mould, be in including setting up last mould on the mould is inserted, the lower part that goes up the mould and insert is provided with the rising head die cavity, the rising head die cavity with the mould die cavity is linked together, go up the mould insert on be provided with the trachea that the rising head die cavity is linked together, trachea one end is located the top of rising head die cavity can let in compressed air, passes through at the cast in-process let in compressed air in the trachea, the upper portion of rising head die cavity form with the pressure of the same order of magnitude of mould pressure that fills in the heat preservation stove continues to form the extrusion effect to the rising head at the in-process that the foundry goods solidifies, transmits the pressure of rising head to distal end defect department through local extruded effect, reaches and produces the feeding and eliminate the purpose of defect to defect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a mold clamping state of a casting mold according to the present application.
Wherein: 1-upper die, 2-lower die, 3-upper die insert, 4-die cavity, 5-riser cavity, 6-air pipe, 7-vent plug, 8-one-way valve and 9-spreader cone.
Detailed Description
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to solve the casting defects of shrinkage porosity, shrinkage cavity and the like far away from a riser, one embodiment of the application provides a casting mold, which comprises an upper mold and a lower mold, wherein the upper mold and the lower mold surround a mold cavity, an upper mold insert is arranged on the upper mold, a riser cavity is arranged at the lower part of the upper mold insert, and the riser cavity is communicated with the mold cavity; the upper die insert is provided with an air pipe communicated with the riser cavity, and one end of the air pipe is located at the top of the riser cavity and can be filled with compressed air. In the embodiment, compressed air is introduced into the air pipe in the casting process, pressure of the same order of magnitude as the mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity, the extrusion effect is continuously formed on the riser in the casting solidification process, and the pressure of the riser is transmitted to the far-end defect part through the local extrusion effect, so that the purpose of feeding the defect part and eliminating the defect is achieved.
In other embodiments, an exhaust plug is arranged between the riser cavity and the air pipe, so that the phenomenon that the molten aluminum enters the air pipe pipeline to block the pipeline during mold filling to cause ineffective extrusion is avoided.
In other embodiments, a one-way valve is arranged on the air pipe, so that the air pipe is further prevented from being blocked by aluminum liquid in the mold filling process, and meanwhile, extrusion gas can be ensured to smoothly enter the riser cavity.
In other embodiments, the cross section of the riser cavity is tapered with a narrow top and a wide bottom, and the tapered riser is beneficial to forming a relatively ideal shrinkage pipe in the riser, so that the feeding efficiency of the riser is improved, and a good casting is obtained.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1:
in the present embodiment 1, a casting mold is provided, as shown in fig. 1, which includes an upper mold 1 and a lower mold 2, and the upper mold 1 and the lower mold 2 enclose a mold cavity 4. The mould comprises an upper mould 1 and is characterized in that an upper mould insert 3 is arranged on the upper mould 1, a riser cavity 5 is arranged at the lower part of the upper mould insert 3, and the riser cavity 5 is communicated with a mould cavity 4. The cross section of the riser cavity 5 is in a conical shape with a narrow top and a wide bottom.
An air pipe 6 communicated with the riser cavity 5 is arranged on the upper die insert 3, one end of the air pipe 6 is located at the top of the riser cavity 5, and compressed air can be introduced into the air pipe. The other end of the air pipe 6 can be connected with an air pressurizing device, such as an air pump, an air compressor or a compressed air station on an on-line.
An air vent plug 7 is arranged between the riser cavity 5 and the air pipe 6, so that the phenomenon that the pipeline of the air pipe 6 is blocked by the molten aluminum during filling can be prevented, and the extrusion is ineffective.
A one-way valve is arranged on the position, 200mm away from the riser, of the air pipe, so that the aluminum liquid is further prevented from blocking an extrusion pipeline of the air pipe 6 in the mold filling process, and meanwhile, the extrusion gas can be guaranteed to smoothly enter the riser cavity 5.
In this embodiment 1, a casting mold is provided, in the casting process, compressed air is introduced through the air pipe 6, a pressure in the same order of magnitude as a mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity 5, an extrusion effect is continuously formed on a riser in the casting solidification process, and the pressure of the riser is transmitted to a far-end defect through the local extrusion effect, so that the purpose of feeding the defect to eliminate the defect is achieved. Through verifying, the utility model discloses can produce obvious suppression effect to the defect within 100mm around the rising head.
The utility model discloses simple structure, convenient operation can eliminate the casting defect that ordinary rising head can't be eliminated, and the foundry goods is crystallized under partial pressure simultaneously, can improve the internal structure performance of foundry goods, promotes product quality, breaks through for differential pressure casting process and provides a method.
Example 2:
in embodiment 2, a differential pressure casting mold is provided, as shown in fig. 1, including an upper mold 1 and a lower mold 2, the upper mold 1 and the lower mold 2 enclosing a mold cavity 4. The mould comprises an upper mould 1 and is characterized in that an upper mould insert 3 is arranged on the upper mould 1, a riser cavity 5 is arranged at the lower part of the upper mould insert 3, and the riser cavity 5 is communicated with a mould cavity 4. The cross section of the riser cavity 5 is in a conical shape with a narrow top and a wide bottom.
An air pipe 6 communicated with the riser cavity 5 is arranged on the upper die insert 3, one end of the air pipe 6 is located at the top of the riser cavity 5, and compressed air can be introduced into the air pipe. The other end of the air pipe 6 can be connected with an air pressurizing device, such as an air pump, an air compressor or a compressed air station on an on-line.
An air vent plug 7 is arranged between the riser cavity 5 and the air pipe 6, so that the phenomenon that the pipeline of the air pipe 6 is blocked by the molten aluminum during filling can be prevented, and the extrusion is ineffective.
A one-way valve is arranged on the position, 200mm away from the riser, of the air pipe, so that the aluminum liquid is further prevented from blocking an extrusion pipeline of the air pipe 6 in the mold filling process, and meanwhile, the extrusion gas can be guaranteed to smoothly enter the riser cavity 5.
The differential pressure casting method of the differential pressure casting die comprises the following steps:
providing a cast aluminum alloy (e.g., ZL101, a356 aluminum alloy); melting the cast aluminum alloy, placing the aluminum liquid in a heat preservation furnace of a casting machine, and pouring at the temperature of 700-; after the die of the casting machine is closed, dry compressed air is introduced into the heat preservation furnace and the die chamber, the pressure is increased to 0.2-0.6MPa, then the die chamber stops pressurizing and keeps the pressure, the pressure in the heat preservation furnace is continuously increased at the speed of 4-20 mbar/s according to a set pressure curve, and the aluminum liquid in the heat preservation furnace is slowly filled into the die cavity of the metal casting die; compressed air is introduced into the air pipe, pressure which is in the same order of magnitude as the mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity (so as to avoid danger caused by overlarge pressure or unobvious extrusion effect caused by undersize pressure and the like), and the extrusion effect is continuously formed on the riser in the process of casting solidification; when the mold filling is finished, all cooling water paths in the mold core of the mold are opened to cool the mold, and the pressure of the heat preservation furnace is kept; the pressure above a riser is relieved, the air pipe is rapidly cut off from the die chamber, the sealing effect of a cavity in the die cavity is ensured, and then the pressure in the die cavity and the heat preservation furnace is relieved; and opening the mold, taking out the casting, and then quickly immersing the casting into water of 30-45 ℃ for cooling to finish the counter-pressure casting production.
In this embodiment 2, an air pressure introduced above a riser is opened during casting, compressed air is introduced through the air pipe 6, pressure of the same order of magnitude as a mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity 5, an extrusion effect is continuously formed on the riser during casting solidification, and the pressure of the riser is transmitted to a far-end defect through a local extrusion effect, so that the defect is eliminated by feeding. Through verifying, the utility model discloses can produce obvious suppression effect to the defect within 100mm around the rising head.
Example 3:
in embodiment 3, there is provided a low-pressure casting mold, as shown in fig. 1, including an upper mold 1 and a lower mold 2, the upper mold 1 and the lower mold 2 enclosing a mold cavity 4. The mould comprises an upper mould 1 and is characterized in that an upper mould insert 3 is arranged on the upper mould 1, a riser cavity 5 is arranged at the lower part of the upper mould insert 3, and the riser cavity 5 is communicated with a mould cavity 4. The cross section of the riser cavity 5 is in a conical shape with a narrow top and a wide bottom.
An air pipe 6 communicated with the riser cavity 5 is arranged on the upper die insert 3, one end of the air pipe 6 is located at the top of the riser cavity 5, and compressed air can be introduced into the air pipe. The other end of the air pipe 6 can be connected with an air pressurizing device, such as an air pump, an air compressor or a compressed air station on an on-line.
An air vent plug 7 is arranged between the riser cavity 5 and the air pipe 6, so that the phenomenon that the pipeline of the air pipe 6 is blocked by the molten aluminum during filling can be prevented, and the extrusion is ineffective.
A one-way valve is arranged on the position, 200mm away from the riser, of the air pipe, so that the aluminum liquid is further prevented from blocking an extrusion pipeline of the air pipe 6 in the mold filling process, and meanwhile, the extrusion gas can be guaranteed to smoothly enter the riser cavity 5.
The low-pressure casting method of the low-pressure casting die comprises the following steps:
providing a cast aluminum alloy (e.g., ZL101, a356 aluminum alloy); melting the cast aluminum alloy, placing the aluminum liquid in a heat preservation furnace of a casting machine, and pouring at the temperature of 680-750 ℃; after the die of the casting machine is closed, pressurizing the inside of the heat preservation furnace at the speed of 4mbar/s-30mbar/s according to a set pressure curve (the pressurizing speed can be changed in a liquid rising stage and a mold filling stage, for example, the liquid rising stage is controlled at 15mbar/s-30mbar/s, and the mold filling stage is controlled at 4mbar/s-15mbar/s), and slowly filling the aluminum liquid in the heat preservation furnace into the cavity of the metal casting die; compressed air is introduced into the air pipe, pressure which is in the same order of magnitude as the mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity (so as to avoid danger caused by overlarge pressure or unobvious extrusion effect caused by undersize pressure and the like), and the extrusion effect is continuously formed on the riser in the process of casting solidification; when the mold filling is finished, all cooling water paths in the mold core of the mold are opened to cool the mold, and the pressure of the heat preservation furnace is kept; the pressure of the air pipe above the riser is relieved, and then the pressure in the heat preservation furnace is relieved; and opening the die, taking out the casting, and performing subsequent working procedures such as heat treatment, machining, coating and the like to finish low-pressure casting.
In this embodiment 3, an air pressure introduced above a riser is opened during casting, compressed air is introduced into the air pipe 6, a pressure in the same order of magnitude as a mold filling pressure in the heat preservation furnace is formed at the upper part of the riser cavity 5, an extrusion effect is continuously formed on the riser during casting solidification, and the pressure of the riser is transmitted to a far-end defect through a local extrusion effect, so that the defect is eliminated by feeding. Through verifying, the utility model discloses can produce obvious suppression effect to the defect within 100mm around the rising head.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (4)
1. A casting mould comprises an upper mould and a lower mould, wherein the upper mould and the lower mould surround a mould cavity;
the upper die insert is provided with an air pipe communicated with the riser cavity, and one end of the air pipe is located at the top of the riser cavity and can be filled with compressed air.
2. A casting mold according to claim 1, wherein a vent plug is provided between the riser cavity and the air tube.
3. A casting mold according to claim 1, wherein the gas pipe is provided with a check valve.
4. A casting mold according to claim 1, wherein the cross section of the feeder cavity is tapered so as to narrow at the top and wide at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021853253.0U CN212216999U (en) | 2020-08-31 | 2020-08-31 | Casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021853253.0U CN212216999U (en) | 2020-08-31 | 2020-08-31 | Casting mould |
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| CN212216999U true CN212216999U (en) | 2020-12-25 |
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| CN202021853253.0U Active CN212216999U (en) | 2020-08-31 | 2020-08-31 | Casting mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940702A (en) * | 2020-08-31 | 2020-11-17 | 中信戴卡股份有限公司 | Casting mold, counter-pressure casting method and low-pressure casting method |
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2020
- 2020-08-31 CN CN202021853253.0U patent/CN212216999U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940702A (en) * | 2020-08-31 | 2020-11-17 | 中信戴卡股份有限公司 | Casting mold, counter-pressure casting method and low-pressure casting method |
| CN111940702B (en) * | 2020-08-31 | 2024-09-24 | 中信戴卡股份有限公司 | Casting mold, differential pressure casting method and low pressure casting method |
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