CN115301931A - Cooling device for automobile part machining - Google Patents

Cooling device for automobile part machining Download PDF

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Publication number
CN115301931A
CN115301931A CN202211066719.6A CN202211066719A CN115301931A CN 115301931 A CN115301931 A CN 115301931A CN 202211066719 A CN202211066719 A CN 202211066719A CN 115301931 A CN115301931 A CN 115301931A
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CN
China
Prior art keywords
cooling
frame body
frame
plate
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211066719.6A
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Chinese (zh)
Inventor
胡俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Superior Die Technology Co Ltd
Original Assignee
Nanjing Superior Die Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Superior Die Technology Co Ltd filed Critical Nanjing Superior Die Technology Co Ltd
Priority to CN202211066719.6A priority Critical patent/CN115301931A/en
Publication of CN115301931A publication Critical patent/CN115301931A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00Cooling castings, not restricted to casting processes covered by a single main group
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/04Handling or stripping castings or ingots
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The invention discloses a cooling device for processing automobile parts, which comprises a backing plate, wherein a cooling frame body is arranged in the middle of the top of the backing plate, a transmission structure is arranged in the cooling frame body, two vertical frame plates are arranged at positions close to the discharge port of the cooling frame body, the inner walls of the two vertical frame plates are respectively provided with a first sliding rail, the inner side of the first sliding rail is provided with a drying box body, one side of the cooling frame body is provided with an air cooling assembly, the other side of the cooling frame body is provided with a water cooling assembly, the side wall of the cooling frame body is provided with a first fan, and the top of the inner wall of the cooling frame body is provided with a placing frame. The middle of the top of the base plate is provided with the cooling frame body, the transmission structure is arranged inside the cooling frame body, parts are transmitted, the first fan can be started to perform auxiliary air cooling in the transmission process, and liquid nitrogen is discharged mainly through the liquid nitrogen tank on the placing frame on the top of the inner wall of the cooling frame body, so that the workpieces are rapidly cooled.

Description

Cooling device for automobile part machining
Technical Field
The invention relates to the technical field of automobile processing equipment, in particular to a cooling device for processing automobile parts.
Background
With the development of science and technology and the progress of the society age, the production technology of automobile parts is developed more and more, the automobile parts are used as the basis of the automobile industry, the automobile parts mainly comprise shells, wheels, seats, grids, glass and the like, the main parts in the automobile are mainly formed by casting through melting aluminum ingots, a melting furnace or a dissolving furnace is needed to melt the aluminum ingots in the melting process of the aluminum ingots, the molten aluminum is cast and formed in a mold to form automobile part blanks, and then the blanks are finished to form finished products. After the aluminum liquid is cast and molded, an automobile part green body is formed, and the high-temperature cast part green body has higher temperature and needs to be cooled in time.
The cooling device for processing the existing automobile parts is generally cooled in a single mode, has poor functionality and low cooling efficiency, and therefore, the cooling device for processing the automobile parts is provided for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides a cooling device for processing automobile parts, which solves the problems that: the cooling device for processing the existing automobile parts generally adopts a single mode to cool, and has the problems of poor functionality and low cooling efficiency.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a cooling device is used in automobile parts processing, is located including the backing plate be provided with the cooling framework in the middle of the top of backing plate, the inside of cooling framework is provided with transmission structure, is close to discharge port department of cooling framework is provided with two upright frame boards, and all is provided with slide rail one on two upright frame boards's the inner wall, the inboard of slide rail one is provided with the stoving box, one side of cooling framework is provided with air-cooled subassembly, and the opposite side is provided with water-cooled subassembly, be provided with two fan one on the lateral wall of cooling framework, and the inner wall top of cooling framework is provided with the rack, and the inboard detachable connections of rack has columnar liquid nitrogen container, is located the bottom of liquid nitrogen container is provided with the calandria.
As a further preferable mode of the invention, the water cooling component comprises a first hydraulic cylinder, the output end of the first hydraulic cylinder is connected with a linkage rod, the linkage rod is L-shaped, the bottom end of the linkage rod is connected with a liquid drainage frame, a support table is arranged right below the liquid drainage frame, and two placing frames are arranged at the top of the support table.
As a further preferable mode of the present invention, a liquid storage tank is arranged at the top of the liquid discharge frame, a liquid tray is connected to the bottom end of the liquid storage tank, a plurality of liquid discharge pipes are connected to the bottom end of the liquid tray, a filter screen is arranged inside the placement frame, and a waste liquid collection frame is connected to the bottom end of the placement frame.
As a further preferable mode of the invention, the air cooling assembly comprises a vertical plate, a plurality of bending rods are equidistantly arranged at the top of the outer wall of the vertical plate, the bottom ends of the bending rods are connected with a second fan, a strip-shaped casting plate is arranged at the bottom of the outer wall of the vertical plate, a second guide rail is arranged at the top of the casting plate, and a fixed structure is slidably connected to the top of the second guide rail.
As a further preferable mode of the present invention, the fixing structure includes a seat plate, a second motor is disposed on the top of the seat plate, an output end of the second motor is connected to a clamp plate, and two clamping blocks are disposed on the top of the clamp plate.
As a further preferable mode of the present invention, the transmission structure includes a transmission table, a first motor is disposed on a side wall of the transmission table, and a protection frame is disposed on a top of the transmission table.
As a further preferable mode of the present invention, a third fan is disposed inside the drying box body, a thermal resistor is disposed right below an output end of the third fan, a heat conducting plate is disposed at a bottom of the thermal resistor, and a plurality of air exhaust ports are connected to a bottom end of the heat conducting plate.
(III) advantageous effects
The invention provides a cooling device for processing automobile parts. The method has the following beneficial effects:
(1) The middle of the top of the base plate is provided with the cooling frame body, the transmission structure is arranged inside the cooling frame body, parts are transmitted, the first fan can be started to perform auxiliary air cooling in the transmission process, and liquid nitrogen is discharged mainly through the liquid nitrogen tank on the placing frame on the top of the inner wall of the cooling frame body, so that the workpieces are rapidly cooled.
(2) The side surface of the cooling frame body is provided with the water cooling assembly, the hydraulic cylinder can be started to drive the linkage rod, the linkage rod enables the liquid discharge frame to be integrally clamped at the top of the support table, meanwhile, parts can be placed in the placing frame of the support table, the top of the liquid discharge frame is provided with the liquid storage tank, the liquid disc and the liquid discharge pipe are used for quickly discharging cooling liquid in the liquid storage tank into the placing frame, the parts are cooled by water, and cooled waste liquid can enter the waste liquid collecting frame through the filter screen for secondary utilization.
(3) According to the air cooling assembly, the bending rod and the fan II on the outer wall of the vertical plate are used, the guide rail II is arranged at the top of the casting plate, the fixing structure is connected to the top of the guide rail II in a sliding mode, the motor II at the top of the seat plate can be used for driving the clamp disc to rotate by the fixing structure, the clamping block using electromagnetism or hydraulic pressure as power is used for quickly fixing a workpiece, air cooling is quickly carried out on the part, the drying box body is further arranged at the end portion of the transmission structure, the fan III in the transmission structure can be used for being matched with a thermal resistor to quickly dry the part after water cooling, and the part can also be quickly reheated.
Drawings
FIG. 1 is an overall schematic configuration of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a schematic view of the internal structure of the liquid discharge frame of the present invention;
fig. 5 is a schematic view of an internal structure of the drying cabinet of the present invention.
In the figure: 1. a backing plate; 2. cooling the frame body; 3. a vertical frame plate; 4. a first slide rail; 5. drying the box body; 6. a first fan; 7. placing a rack; 8. a liquid nitrogen tank; 9. a first hydraulic cylinder; 10. a linkage rod; 11. a liquid discharge frame; 12. supporting a platform; 13. placing the frame; 14. a liquid storage tank; 15. a liquid pan; 16. filtering with a screen; 17. a waste liquid collection frame; 18. a vertical plate; 19. a bending rod; 20. a second fan; 21. casting a plate; 22. a second guide rail; 23. a seat plate; 24. a second motor; 25. a clamp plate; 26. a clamping block; 27. a transfer station; 28. a first motor; 29. a protective frame; 30. a third fan; 31. a thermal resistor; 32. a heat conducting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Referring to fig. 1-5, an embodiment of the present invention provides a technical solution:
the utility model provides a cooling device is used in automobile parts processing, including backing plate 1, be located and be provided with cooling frame body 2 in the middle of backing plate 1's the top, cooling frame body 2's inside is provided with transmission structure, discharge port department that is close to cooling frame body 2 is provided with two upright frame boards 3, and all be provided with slide rail 4 on two upright frame board 3's the inner wall, slide rail 4's inboard is provided with stoving box 5, one side of cooling frame body 2 is provided with the air-cooled subassembly, and the opposite side is provided with the water-cooling subassembly, be provided with two fans 6 on cooling frame body 2's the lateral wall, and cooling frame body 2's inner wall top is provided with rack 7, and rack 7's inboard detachable connections has cylindrical liquid nitrogen container 8, the bottom that is located liquid nitrogen container 8 is provided with the calandria.
The water cooling component comprises a first hydraulic cylinder 9, the output end of the first hydraulic cylinder 9 is connected with a linkage rod 10, the linkage rod 10 is L-shaped, the bottom end of the linkage rod is connected with a liquid drainage frame 11, a supporting table 12 is arranged right below the liquid drainage frame 11, two placing frames 13 are arranged at the top of the supporting table 12, and the first hydraulic cylinder 9 can be used for downwards placing the whole liquid drainage frame 11 and covering the whole placing frames 13.
The top of flowing back frame 11 is provided with liquid storage pot 14, and the bottom of liquid storage pot 14 is connected with liquid dish 15, and the bottom that is located liquid dish 15 is connected with a plurality of fluid-discharge tube, and the inside of placing frame 13 is provided with filter screen 16, and the bottom of placing frame 13 is connected with waste liquid and collects frame 17, through using liquid storage pot 14 and liquid dish 15 to pass through the fluid-discharge tube with the coolant liquid of inside and arrange to placing frame 13 in, cool off the washing to the part.
The air cooling assembly comprises a vertical plate 18, a plurality of bending rods 19 are equidistantly arranged at the top of the outer wall of the vertical plate 18, the bottom end of each bending rod 19 is connected with a second fan 20, a strip-shaped casting plate 21 is arranged at the bottom of the outer wall of the vertical plate 18, a second guide rail 22 is arranged at the top of the casting plate 21, the top of the second guide rail 22 is slidably connected with a fixed structure, and the second fan 20 on the vertical plate 18 faces a part on the fixed structure to be rapidly fixed.
Fixed knot constructs including bedplate 23, and the top that is located bedplate 23 is provided with two 24 motors, and the output of two 24 motors is connected with anchor clamps dish 25, and the top that is located anchor clamps dish 25 is provided with two clamp splice 26, drives anchor clamps dish 25 through using two 24 motors and rotates, can use hydraulic pressure or electromagnetism as power, drives clamp splice 26 and fixes the part.
The conveying structure comprises a conveying table 27, a first motor 28 is arranged on the side wall of the conveying table 27, a protective frame 29 is arranged at the top of the conveying table 27, and the first motor 28 on the side wall of the conveying table 27 is used for driving an inner conveying belt of the conveying table to convey parts.
The inside of stoving box 5 is provided with three 30 of fan, and is provided with thermal resistance 31 under three 30's of fan output, and the bottom that is located thermal resistance 31 is provided with heat-conducting plate 32, and the bottom of heat-conducting plate 32 is connected with a plurality of port of airing exhaust, through using three 30 output cold wind of fan, reheat resistance 31 sends into hot-blast discharge to the part, dries it, perhaps quick temperature returns.
The working principle is as follows: be provided with cooling frame body 2 in the middle of the top of backing plate 1, inside through using cooling frame body 2 is provided with transmission structure, transmit the part, in the transmission process, can start fan one 6 and carry out supplementary forced air cooling, and mainly discharge the liquid nitrogen through liquid nitrogen tank 8 on the inner wall top rack 7 that uses cooling frame body 2, handle the quick cooling of work piece, the side of cooling frame body 2 is provided with water-cooling subassembly, can start hydraulic cylinder one 9 and drive gangbar 10, gangbar 10 is whole card of flowing back frame 11 at the top of brace 12, can put into the part in the frame 13 of placing of brace 12 simultaneously, the top of flowing back frame 11 is provided with liquid storage pot 14, use liquid storage pot 14 and liquid dish 15 and fluid-discharge pipe to discharge inside coolant liquid fast to placing frame 13, carry out the water-cooling to the part, but after the cooling waste liquid 16 gets into waste liquid collection frame 17, carry out reutilization, air-cooling subassembly, through using the pole of buckling 19 and fan two 20 on the outer wall of riser 18, the top of cast plate 21 is provided with guide rail two 22, and the top sliding connection has fixed structure, fixed structure can use the quick drying power of the quick drying motor of two 24 and carry out the quick drying motor to the quick drying of the part of drying machine, it is still as the quick drying end part of water-cooling fan 26, it is provided with the quick drying motor to carry out the quick drying machine.
The invention 1, backing plate; 2. cooling the frame body; 3. erecting a frame plate; 4. a first slide rail; 5. drying the box body; 6. a first fan; 7. placing a rack; 8. a liquid nitrogen tank; 9. a first hydraulic cylinder; 10. a linkage rod; 11. a liquid discharge frame; 12. supporting a platform; 13. placing the frame; 14. a liquid storage tank; 15. a liquid pan; 16. filtering with a screen; 17. a waste liquid collection frame; 18. a vertical plate; 19. a bending rod; 20. a second fan; 21. casting a plate; 22. a second guide rail; 23. a seat plate; 24. a second motor; 25. a clamp plate; 26. a clamping block; 27. a transfer station; 28. a first motor; 29. a protective frame; 30. a third fan; 31. a thermal resistor; 32. the invention solves the problems that the existing cooling device for processing the automobile parts is generally cooled in a single mode, has poor functionality and low cooling efficiency, and adopts the mutual combination of the parts, the cooling frame body is arranged in the middle of the top of the base plate, the transmission structure is arranged in the cooling frame body to transmit the parts, a fan I can be started to carry out auxiliary air cooling in the transmission process, and the liquid nitrogen is discharged by a liquid nitrogen tank on a placing frame at the top of the inner wall of the cooling frame body to carry out quick cooling treatment on the parts, and the water cooling component is arranged on the side surface of the cooling frame body, the air cooling component of the invention uses a bending rod and a second fan on the outer wall of the vertical plate, the top of the casting plate is provided with a second guide rail, the top of the second guide rail is connected with a fixed structure in a sliding manner, the second motor at the top of the base plate can be used for driving the clamp plate to rotate, a clamp block using electromagnetism or hydraulic pressure as power is used for quickly fixing a workpiece, the part is quickly cooled, the end part of the transmission structure is also provided with a drying box body, the three fans inside the heat exchanger can be matched with the thermal resistor to quickly dry the water-cooled part, and the part can be quickly reheated.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a cooling device is used in automobile parts processing, is including backing plate (1), its characterized in that: be located be provided with cooling frame body (2) in the middle of the top of backing plate (1), the inside of cooling frame body (2) is provided with transmission structure, is close to discharge port department of cooling frame body (2) is provided with two upright frame board (3), and all is provided with slide rail (4) on the inner wall of two upright frame board (3), the inboard of slide rail (4) is provided with stoving box (5), one side of cooling frame body (2) is provided with the forced air cooling subassembly, and the opposite side is provided with the water-cooling subassembly, be provided with two fan (6) on the lateral wall of cooling frame body (2), and the inner wall top of cooling frame body (2) is provided with rack (7), and the inboard releasable connection of rack (7) has columnar liquid nitrogen container (8), is located the bottom of liquid nitrogen container (8) is provided with the calandria.
2. The cooling device for processing the automobile parts according to claim 1, wherein: the water-cooling subassembly is including pneumatic cylinder (9), the output of pneumatic cylinder (9) is connected with gangbar (10), gangbar (10) are L font shape and bottom and are connected with flowing back frame (11), be provided with under flowing back frame (11) and prop platform (12), be located prop the top of platform (12) and be provided with two and place frame (13).
3. The cooling device for processing the automobile parts according to claim 2, wherein: the top of flowing back frame (11) is provided with liquid storage pot (14), and the bottom of liquid storage pot (14) is connected with liquid dish (15), is located the bottom of liquid dish (15) is connected with a plurality of fluid-discharge tube, the inside of placing frame (13) is provided with filter screen (16), and the bottom of placing frame (13) is connected with waste liquid and collects frame (17).
4. The cooling device for processing the automobile parts according to claim 1, wherein: the air cooling assembly comprises a vertical plate (18), a plurality of bending rods (19) are equidistantly arranged at the top of the outer wall of the vertical plate (18), the bottom ends of the bending rods (19) are connected with a second fan (20), a strip-shaped casting plate (21) is arranged at the bottom of the outer wall of the vertical plate (18), a second guide rail (22) is arranged at the top of the casting plate (21), and the top of the second guide rail (22) is connected with a fixed structure in a sliding mode.
5. The cooling device for automobile part processing according to claim 4, wherein: the fixing structure comprises a seat plate (23), a second motor (24) is arranged at the top of the seat plate (23), the output end of the second motor (24) is connected with a clamp disc (25), and two clamping blocks (26) are arranged at the top of the clamp disc (25).
6. The cooling device for processing the automobile parts according to claim 1, wherein: the transmission structure comprises a transmission platform (27), a first motor (28) is arranged on the side wall of the transmission platform (27), and a protective frame (29) is arranged at the top of the transmission platform (27).
7. The cooling device for processing the automobile parts according to claim 1, wherein: the drying box is characterized in that a third fan (30) is arranged inside the drying box body (5), a thermal resistor (31) is arranged right below the output end of the third fan (30), a heat conduction plate (32) is arranged at the bottom of the thermal resistor (31), and the bottom end of the heat conduction plate (32) is connected with a plurality of air exhaust ports.
CN202211066719.6A 2022-09-01 2022-09-01 Cooling device for automobile part machining Pending CN115301931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211066719.6A CN115301931A (en) 2022-09-01 2022-09-01 Cooling device for automobile part machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211066719.6A CN115301931A (en) 2022-09-01 2022-09-01 Cooling device for automobile part machining

Publications (1)

Publication Number Publication Date
CN115301931A true CN115301931A (en) 2022-11-08

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CN202211066719.6A Pending CN115301931A (en) 2022-09-01 2022-09-01 Cooling device for automobile part machining

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014038333A1 (en) * 2012-09-06 2014-03-13 日産自動車株式会社 Process for producing aluminum alloy casting
CN205362639U (en) * 2016-03-23 2016-07-06 广西铁合金有限责任公司 A cooling device for 200 is stainless steel moulded blank
CN107119184A (en) * 2017-04-12 2017-09-01 重庆市永川区益锐机械有限责任公司 A kind of heat treating castings cooling device
CN107262700A (en) * 2017-08-03 2017-10-20 新兴铸管股份有限公司 Cast tube cooling system
CN209272447U (en) * 2018-12-12 2019-08-20 天津市昌明机械制造有限公司 A kind of brake disc cooling device for processing
CN212469730U (en) * 2020-03-13 2021-02-05 沈阳贝欣特铸造工业有限公司 Rapid cooling device for casting metal fittings
CN212792971U (en) * 2020-08-04 2021-03-26 德清县伟盛铸造有限公司 Casting cooling device
CN215550268U (en) * 2021-08-20 2022-01-18 巴普(中国)冷却设备有限公司 Workpiece cooling equipment for mold production

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014038333A1 (en) * 2012-09-06 2014-03-13 日産自動車株式会社 Process for producing aluminum alloy casting
CN205362639U (en) * 2016-03-23 2016-07-06 广西铁合金有限责任公司 A cooling device for 200 is stainless steel moulded blank
CN107119184A (en) * 2017-04-12 2017-09-01 重庆市永川区益锐机械有限责任公司 A kind of heat treating castings cooling device
CN107262700A (en) * 2017-08-03 2017-10-20 新兴铸管股份有限公司 Cast tube cooling system
CN209272447U (en) * 2018-12-12 2019-08-20 天津市昌明机械制造有限公司 A kind of brake disc cooling device for processing
CN212469730U (en) * 2020-03-13 2021-02-05 沈阳贝欣特铸造工业有限公司 Rapid cooling device for casting metal fittings
CN212792971U (en) * 2020-08-04 2021-03-26 德清县伟盛铸造有限公司 Casting cooling device
CN215550268U (en) * 2021-08-20 2022-01-18 巴普(中国)冷却设备有限公司 Workpiece cooling equipment for mold production

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