CN221087186U - Casting production line and vacuum replacement hardening device thereof - Google Patents
Casting production line and vacuum replacement hardening device thereof Download PDFInfo
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- CN221087186U CN221087186U CN202322785253.1U CN202322785253U CN221087186U CN 221087186 U CN221087186 U CN 221087186U CN 202322785253 U CN202322785253 U CN 202322785253U CN 221087186 U CN221087186 U CN 221087186U
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 40
- 239000000428 dust Substances 0.000 claims abstract description 33
- 239000004576 sand Substances 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002920 hazardous waste Substances 0.000 abstract description 5
- 239000002912 waste gas Substances 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 244000035744 Hura crepitans Species 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model discloses a casting production line and a vacuum replacement hardening device thereof, wherein the vacuum replacement hardening device comprises a vacuum box and a vacuum pump unit connected with the vacuum box, and the vacuum pump unit comprises an air suction channel, a Roots vacuum pump and a dry screw vacuum pump which are arranged on the air suction channel and are connected in series along the air suction direction, and a dust filter arranged on the air suction channel. The vacuum displacement hardening device provided by the utility model does not need to use vacuum pump oil, can reduce the use cost, avoid environmental pollution, does not generate hazardous waste and harmful waste gas, has better environmental protection, can well adapt and accommodate the pumped water vapor and fine sand dust in the operation process of the vacuum pump, completely adapts to the use working condition of VRH, does not cause abnormal damage of equipment, effectively improves the operation stability and service life, can improve the vacuumizing efficiency, meets the performance requirement, and improves the vacuum displacement hardening effect of sand molds.
Description
Technical Field
The utility model relates to the technical field of sand casting, in particular to a vacuum displacement hardening device and a casting production line adopting the vacuum displacement hardening device.
Background
At present, regarding the VRH (vacuum REPLACE HARDENING) vacuum displacement hardening technology, a sand mold using sodium silicate (sodium silicate as a main component) as a binder is mainly subjected to vacuum pumping treatment, and the casting process comprises the following steps: filling sand into a sand box through a sand mixer, enabling the sand box to enter a vacuum box, vacuumizing to dehydrate and harden the sand mould, and filling CO 2 to finally solidify the sand mould. In the process, the vacuum degree and the vacuum holding time of the vacuum box which can be achieved belong to key process parameters, and play a decisive role in the strength of the sand mould, so that the performance and the stability of the vacuum pump equipment are extremely important.
However, the existing VRH apparatus simply installs a vacuum pump directly on a vacuum box, for example, the VRH-CO2 hardening apparatus for molding water glass reinforced plastic sand provided in chinese patent No. CN215614851U includes a vacuum box and a vacuum pump, the vacuum box is connected with the vacuum pump, and the volume in the vacuum box is adjusted by using a filler, so that the efficiency of vacuumizing is improved. However, the applicability of the vacuum box can be reduced due to the arrangement of the filler, the vacuum box cannot be adapted to casting products of different specifications, and only a single vacuum pump is configured and installed on the vacuum box, so that the performance requirement on the vacuum pump is extremely high, particularly when a slide valve type vacuum pump is adopted, moisture and fine sand dust enter the vacuum pump in the vacuum pumping process, the moisture entering the oil liquid of the vacuum pump per production shift can exceed 0.5% of the total quantity of the oil liquid according to actual use statistics, the vacuum pump cavity is subjected to water draining operation before each shift start-up, a layer of mud with the similar color and the fine particle size of casting sand can be deposited at the bottom after the used oil liquid of the vacuum pump is clarified, and the sand dust of fine particles is proved to enter the vacuum pump, so that the slide valve type vacuum pump has the problems of emulsion deterioration of the oil liquid of the vacuum pump, the abrasion of the slide valve and the pump cavity is excessively fast in use, the equipment performance is reduced rapidly, the air pumping rate and the vacuum degree are difficult to ensure, and the production work is greatly influenced. Secondly, the slide valve type vacuum pump has the problems of vacuum oil leakage, smoke emission and the like when in operation, the oil pollution phenomenon of the equipment in the use site is serious, and the smoke (generated by the vacuum pump oil) is uninterruptedly discharged outwards when the equipment is in operation, so that the pollution is serious. Meanwhile, as the working performance of the vacuum pump can fluctuate, the actual production needs to be maintained by adopting methods of prolonging the air extraction time, increasing the dosage of CO 2 and the like, so that the production cost is increased, and the production efficiency is reduced. And the waste water discharged in each shift is mixed with vacuum pump oil, and the vacuum pump oil is changed after deterioration, so that the waste water is treated according to the danger, and the flue gas discharged during the operation of the vacuum pump is treated by adopting a carbon adsorption method, thereby further improving the production cost.
Disclosure of utility model
The utility model provides a vacuum displacement hardening device for solving the technical problems of high performance requirement, high production cost and serious pollution of the existing vacuum displacement hardening device on a vacuum pump.
The utility model also provides a casting production line, which adopts the vacuum replacement hardening device.
According to a first aspect of the present utility model, there is provided a vacuum displacement hardening apparatus comprising a vacuum box and a vacuum pump unit connected to the vacuum box, the vacuum pump unit comprising a suction channel, a roots vacuum pump and a dry screw vacuum pump provided on the suction channel and connected in series in a suction direction, and a dust filter provided on the suction channel.
Preferably, the dust filter includes a first dust filter provided at an air inlet end of the roots vacuum pump and a second dust filter provided between the dry screw vacuum pump and the roots vacuum pump.
Preferably, the vacuum pump unit further comprises a one-way valve arranged on the air inlet end of the Roots vacuum pump.
Preferably, a plurality of vacuum pump units are arranged, and the plurality of vacuum pump units are connected in parallel and are respectively connected with the vacuum boxes.
Preferably, the vacuum displacement hardening device further comprises a vacuum tank provided between the vacuum box and the vacuum pump unit.
Preferably, a plurality of vacuum boxes are provided, and the plurality of vacuum boxes are respectively connected with the vacuum tank.
Preferably, the vacuum displacement hardening device further comprises a vacuum valve arranged between the vacuum box and the vacuum pump unit, wherein the vacuum valve is electrically connected with the vacuum pump unit, so that when the vacuum valve is opened, a signal is sent out through the vacuum valve to drive the Roots vacuum pump and/or the dry screw vacuum pump to be opened synchronously.
Preferably, the vacuum displacement hardening device further comprises an air pressure detection assembly which is arranged on the vacuum box and is electrically connected with the vacuum pump unit.
Preferably, the vacuum displacement hardening device further comprises a gas storage tank connected with the vacuum box, and the gas storage tank is used for conveying reaction gas into the vacuum box.
According to a second aspect of the utility model, there is also provided a casting production line comprising a sand mixer, a motorized roller way connected with the sand mixer, and the vacuum displacement hardening device, wherein the vacuum displacement hardening device is connected with the motorized roller way, and the motorized roller way is used for driving a die to move from a discharging position of the sand mixer into a vacuum box of the vacuum displacement hardening device.
The utility model has the following beneficial effects:
In the vacuum displacement hardening device provided by the utility model, the vacuum pump unit comprises the Roots vacuum pump and the dry screw vacuum pump which are connected in series along the air extraction direction, and as the Roots vacuum pump and the dry screw vacuum pump do not use any working medium and do not need to use vacuum pump oil, the use cost can be reduced, the environmental pollution can be avoided, hazardous waste and harmful waste gas are not generated, the hazardous waste treatment and harmful waste gas treatment cost are not generated, and the environmental protection is better. And because the main functional components of the dry screw vacuum pump are two rotors arranged in the inner cavity, a tiny gap is reserved between the tooth surfaces of the two rotors, and a gap of about 0.1mm is reserved between the rotor and the pump cavity as well as between the rotors adjacent to each other, so that the Roots vacuum pump and the dry screw vacuum pump can have good adaptability and capacity for pumped vapor and tiny sand dust in the operation process, can better pump out various gases with corrosiveness, toxicity, dust, condensable vapor and the like, completely adapt to the use condition of VRH, cannot cause problems of emulsion deterioration of oil liquid of the vacuum pump, excessively rapid abrasion of a slide valve and the pump cavity and the like, do not have abnormal damage of equipment, and effectively improve the operation stability and the service life. Secondly, through the cooperation operation of roots vacuum pump and dry-type screw vacuum pump, adopt dust filter to filter the passageway of bleeding simultaneously, can guarantee the cleanliness factor of the gas that gets into the vacuum pump unit, can improve the evacuation efficiency again, satisfy the performance requirement, ensure with actual demand assorted, promote the vacuum replacement hardening effect of sand mould.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a block diagram of a vacuum displacement hardening apparatus according to an embodiment of the present utility model;
Fig. 2 is a schematic structural view of a casting line according to an embodiment of the present utility model.
Legend description:
1000. A casting production line; 1. a vacuum displacement hardening device; 11. a vacuum box; 12. a vacuum pump unit; 121. an air extraction channel; 122. roots vacuum pump; 123. a dry screw vacuum pump; 124. a dust filter; 1241. a first dust filter; 1242. a second dust filter; 13. a vacuum tank; 14. a vacuum valve; 15. a gas storage tank; 16. a gas supply valve group; 2. a sand mixer; 3. and (5) a motorized roller way.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.
As shown in fig. 1, as a first aspect, an embodiment of the present utility model provides a vacuum displacement hardening apparatus 1, including a vacuum box 11 and a vacuum pump unit 12, wherein the vacuum box 11 is provided with an inner cavity for placing a mold, and the vacuum pump unit 12 is connected to the vacuum box 11 and is used for evacuating the inner cavity of the vacuum box 11, so as to dehydrate and harden a sand mold in the mold.
Preferably, the vacuum pump unit 12 includes a suction channel 121, and a Roots vacuum pump 122, a dry screw vacuum pump 123 and a dust filter 124 respectively disposed on the suction channel 121, wherein the Roots vacuum pump 122 and the dry screw vacuum pump 123 are disposed in series along a suction direction of the suction channel 121.
Specifically, in the vacuum displacement hardening device 1, the vacuum pump unit 12 includes the roots vacuum pump 122 and the dry screw vacuum pump 123 connected in series along the air suction direction, and since the roots vacuum pump 122 and the dry screw vacuum pump 123 do not use any working medium, no vacuum pump oil is needed, the use cost can be reduced, environmental pollution can be avoided, hazardous waste and harmful waste gas are not generated, hazardous waste treatment and harmful waste gas treatment cost are not existed, and the environmental protection is better. And because the main functional components of the dry screw vacuum pump 123 are two rotors installed in the inner cavity, a tiny gap is reserved between the tooth surfaces of the two rotors, and a gap of about 0.1mm is reserved between the rotor of the Roots vacuum pump 122 and the pump cavity and between the rotors adjacent to the rotor, so that the Roots vacuum pump 122 and the dry screw vacuum pump 123 can have good adaptability and capacity for pumped vapor and tiny sand dust in the operation process, can better pump out various gases with corrosiveness, toxicity, dust, condensable vapor and the like, completely adapt to the use working conditions of VRH, cannot cause the problems of emulsion deterioration of the oil liquid of the vacuum pump, excessive wear of a slide valve and the pump cavity and the like, cannot cause abnormal damage of equipment, and effectively improves the operation stability and service life. Secondly, through the cooperation operation of roots vacuum pump 122 with dry-type screw vacuum pump 123 adopts simultaneously dust filter 124 is right pumping channel 121 filters, can guarantee the entering vacuum pump unit 12's gaseous cleanliness factor can improve the evacuation efficiency again, satisfies the performance requirement, ensures to match with actual demand, promotes the vacuum replacement hardening effect of sand mould.
Preferably, the dust filter 124 includes a first dust filter 1241 and a second dust filter 1242, the first dust filter 1241 is disposed at an air inlet end of the roots vacuum pump 122, and the second dust filter 1242 is disposed between the dry screw vacuum pump 123 and the roots vacuum pump 122, that is, the second dust filter 1242 is disposed at an air inlet end of the dry screw vacuum pump 123. Two-stage filters are arranged in the vacuum pump unit 12, the first-stage filtration is performed through the first dust filter 1241, dust entering the Roots vacuum pump 122 is reduced, and the second-stage filtration is performed through the second dust filter 1242, so that a rotor in the dry screw vacuum pump 123 is reliably protected, and the operation stability and the service life of the vacuum pump are effectively improved.
Preferably, the vacuum pump unit 12 further includes a one-way valve (not shown in the figures, and the same applies below) disposed on the air inlet end of the Roots vacuum pump 122, the one-way valve being disposed along the air suction direction of the Roots vacuum pump 122, and the one-way valve being used to prevent the pumped moisture and other impurities from returning to the vacuum box 11 along the air suction channel 121, so as to ensure the vacuum effect of the vacuum box 11.
Preferably, a plurality of vacuum pump units 12 are provided, and the plurality of vacuum pump units 12 are connected in parallel to each other and connected to the vacuum box 11, respectively. In this embodiment, two vacuum pump units 12 are provided, and two vacuum pump units 12 are configured in parallel to form a standby redundant unit, when one vacuum pump unit 12 fails and stops, the other vacuum pump unit 12 can be started to maintain the operation of production work, and the two vacuum pump units 12 can be started simultaneously when the vacuumizing efficiency and effect are required to be quickened, so that different production requirements are met. In other embodiments, the vacuum pump assembly 12 may also be provided with three or more depending on the size of the vacuum box 11 and the pumping rate requirements.
More preferably, the vacuum displacement hardening device 1 further comprises a vacuum tank 13, and the vacuum tank 13 is disposed between the vacuum box 11 and the vacuum pump unit 12. When the vacuum pump unit 12 is used, the vacuum tank 13 can be vacuumized in advance, then the vacuum tank 13 and the vacuum box 11 are conducted, and the air in the vacuum box 11 is rapidly pumped away by utilizing the negative pressure generated by the vacuum tank 13, so that the air pumping time is shortened, the production efficiency is improved, and the energy is saved.
More preferably, the vacuum boxes 11 are provided with a plurality of vacuum boxes 11, the plurality of vacuum boxes 11 are respectively connected with the vacuum tank 13, and then the vacuum boxes 11 are simultaneously or sequentially vacuumized through the cooperation of the vacuum pump unit 12 and the vacuum tank 13, so that batch production is realized, and the production efficiency is further improved.
Further, the vacuum displacement hardening device 1 further includes a vacuum valve 14 disposed between the vacuum box 11 and the vacuum pump unit 12, the vacuum valve 14 is disposed in one-to-one correspondence with the vacuum box 11, and the vacuum box 11 is controlled to be turned on or turned off relative to the vacuum pump unit 12 by the vacuum valve 14. The vacuum valve 14 is electrically connected with the vacuum pump unit 12, so that when the vacuum valve 14 is opened, a signal is sent out by the vacuum valve 14 to drive the Roots vacuum pump 122 and/or the dry screw vacuum pump 123 to be opened synchronously, linkage control of a load valve opening and closing signal is realized, idle running of the Roots vacuum pump 122 and/or the dry screw vacuum pump 123 is avoided, and electric energy is saved while an air extraction effect is ensured.
Further, the vacuum displacement hardening device 1 further includes an air pressure detecting component (not shown in the drawings, the same applies below) disposed on the vacuum box 11 and electrically connected with the vacuum pump unit 12, the air pressure detecting component may specifically be a vacuum pressure sensor or a vacuum pressure gauge, the air pressure detecting component is configured to detect the internal air pressure of the vacuum box 11 in real time, send a signal to close the vacuum pump unit 12 when the vacuum degree of the vacuum box 11 meets the requirement, send a signal to start the vacuum pump unit 12 when the vacuum degree of the vacuum box 11 decreases, and further realize automatic start-stop control of the vacuum pump unit 12 according to the pressure value of the vacuum box 11, thereby reducing manual operation and being more convenient to use.
As shown in fig. 2, the vacuum displacement hardening device 1 further includes a gas tank 15 connected to the vacuum box 11, where the gas tank 15 is used to convey a reaction gas into the vacuum box 11, for example, the gas tank 15 stores CO 2 and after the sand mold in the vacuum box 11 is dehydrated and hardened, CO2 is filled into the vacuum box 11 to finally cure the sand mold. The vacuum displacement hardening device 1 is provided with the air storage tank 15, so that the use effect is better.
Further, the vacuum displacement hardening device 1 further includes a gas supply valve set 16, where the gas supply valve set 16 is disposed between the gas tank 15 and the vacuum box 11 and is used to control opening and closing of the gas tank 15, and/or adjust gas supply flow and gas pressure of the gas tank 15, so as to meet different use requirements.
As a second aspect, the embodiment of the present utility model further provides a casting production line 1000, including a sand mixer 2, a motorized roller way 3, and the vacuum displacement hardening device 1 described above, where a first end of the motorized roller way 3 is connected to the sand mixer 2, and a second end of the motorized roller way 3 is connected to a vacuum box 11 of the vacuum displacement hardening device 1, and the motorized roller way 3 is used to drive a mold to move from a discharge position of the sand mixer 2 into the vacuum box 11, so that the mold enters the vacuum box 11 to implement a vacuum displacement hardening process of a sand mold after receiving sand from the sand mixer 2.
Because the casting production line 1000 adopts the vacuum replacement hardening device 1, the use cost can be reduced, the environmental pollution is avoided, the abnormal damage condition of equipment can not appear, the operation stability and the service life are effectively improved, the vacuumizing efficiency is improved, the performance requirement is met, and the vacuum replacement hardening effect of the sand mold is further improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The vacuum replacement hardening device comprises a vacuum box (11) and a vacuum pump unit (12) connected with the vacuum box (11), and is characterized in that the vacuum pump unit (12) comprises an air suction channel (121), a Roots vacuum pump (122) and a dry screw vacuum pump (123) which are arranged on the air suction channel (121) and are connected in series along the air suction direction, and a dust filter (124) arranged on the air suction channel (121).
2. The vacuum displacement hardening apparatus according to claim 1, wherein the dust filter (124) includes a first dust filter (1241) and a second dust filter (1242), the first dust filter (1241) being provided at an air intake end of the roots vacuum pump (122), the second dust filter (1242) being provided between the dry screw vacuum pump (123) and the roots vacuum pump (122).
3. The vacuum displacement hardening device according to claim 1, wherein the vacuum pump assembly (12) further comprises a one-way valve provided on an air intake end of the roots vacuum pump (122).
4. Vacuum displacement hardening device according to claim 1, characterized in that the vacuum pump assembly (12) is provided in plurality, and the plurality of vacuum pump assemblies (12) are connected in parallel with each other and are connected with the vacuum box (11) respectively.
5. Vacuum displacement hardening device according to claim 1 or 4, characterized in that it further comprises a vacuum tank (13) arranged between the vacuum box (11) and the vacuum pump assembly (12).
6. Vacuum displacement hardening device according to claim 5, characterized in that the vacuum boxes (11) are provided in plurality, and the vacuum boxes (11) are connected to the vacuum tank (13) respectively.
7. Vacuum displacement hardening device according to claim 1, further comprising a vacuum valve (14) arranged between the vacuum box (11) and the vacuum pump assembly (12), the vacuum valve (14) being electrically connected to the vacuum pump assembly (12) for driving the Roots vacuum pump (122) and/or the dry screw vacuum pump (123) synchronously on by a signal sent by the vacuum valve (14) when the vacuum valve (14) is opened.
8. Vacuum displacement hardening device according to claim 1, characterized in that it further comprises an air pressure detection assembly provided on the vacuum box (11) and electrically connected to the vacuum pump assembly (12).
9. Vacuum displacement hardening device according to claim 1, characterized in that it further comprises a gas reservoir (15) connected to the vacuum box (11), the gas reservoir (15) being adapted to convey a reactive gas into the vacuum box (11).
10. Casting production line, including sand mixer (2) and with motorized roller bed (3) that sand mixer (2) are connected, characterized in that, casting production line still includes the vacuum displacement hardening device of any one of claims 1 to 9, the vacuum displacement hardening device with motorized roller bed (3) are connected, motorized roller bed (3) are used for driving the mould and move to in vacuum chamber (11) of vacuum displacement hardening device from the ejection of compact position of sand mixer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322785253.1U CN221087186U (en) | 2023-10-17 | 2023-10-17 | Casting production line and vacuum replacement hardening device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322785253.1U CN221087186U (en) | 2023-10-17 | 2023-10-17 | Casting production line and vacuum replacement hardening device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221087186U true CN221087186U (en) | 2024-06-07 |
Family
ID=91305883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322785253.1U Active CN221087186U (en) | 2023-10-17 | 2023-10-17 | Casting production line and vacuum replacement hardening device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221087186U (en) |
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2023
- 2023-10-17 CN CN202322785253.1U patent/CN221087186U/en active Active
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