CN116159991A - Automatic lost foam firing and casting production line - Google Patents
Automatic lost foam firing and casting production line Download PDFInfo
- Publication number
- CN116159991A CN116159991A CN202211682101.2A CN202211682101A CN116159991A CN 116159991 A CN116159991 A CN 116159991A CN 202211682101 A CN202211682101 A CN 202211682101A CN 116159991 A CN116159991 A CN 116159991A
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- Prior art keywords
- automatic
- sand box
- casting
- semi
- roller type
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- 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.)
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Links
- 238000005266 casting Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000006260 foam Substances 0.000 title claims abstract description 13
- 238000010304 firing Methods 0.000 title claims description 10
- 244000035744 Hura crepitans Species 0.000 claims abstract description 104
- 238000012546 transfer Methods 0.000 claims abstract description 76
- 238000000465 moulding Methods 0.000 claims abstract description 41
- 238000010114 lost-foam casting Methods 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 10
- 238000010285 flame spraying Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
- B22D47/02—Casting plants for both moulding and casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/08—Controlling, supervising, e.g. for safety reasons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention discloses an automatic lost foam casting production line, which relates to the technical field of lost foam casting equipment, and mainly comprises a roller type sand box semiautomatic transfer line of a molding system, a semiautomatic casting vehicle, an automatic mold burning system, a vacuum negative pressure system, a roller type sand box semiautomatic transfer line of a casting system and a control cabinet; the roller type sand box semiautomatic transfer line of the molding system is used for conveying the sand box; the molding system is used for manufacturing a sand mold in the sand box; the transfer system is used for transferring the sand box; the semi-automatic pouring truck is used for pouring into the sand box; the automatic mold burning system is used for burning molds into the cavity of the sand box; the control module is electrically connected with the automatic die burning system and the vacuum negative pressure system. The automatic lost foam burning and casting production line can realize full/semi-automation, can realize that the model is burnt completely before casting, and prevents carburetion on the surface of cast steel; the automation degree and the efficiency are improved, and the cast steel yield is improved; collecting and concentrating the materials by a vacuum negative pressure system to realize green casting.
Description
Technical Field
The invention relates to the technical field of lost foam casting equipment, in particular to an automatic lost foam casting production line.
Background
The patent document with the publication number of CN106513658A discloses a high-efficiency energy-saving aluminum alloy lost foam casting production line, which comprises a sand box automatic circulation line, wherein a plurality of box loading trolleys which move along a conveying line and are used for loading sand boxes are arranged on the sand box automatic circulation line, the box loading trolleys bear the sand boxes and sequentially pass through a bottoming sand station, a model cluster placing station, a sand filling molding station, a pouring station, a workpiece discharging station and a sand falling station on the conveying line through a servo box pushing system; pouring station package casting machine and trade package system, the work station of going out be provided with get a robot with the foundry goods in the sand box takes out, the shakeout station is provided with the bottom discharge type shakeout device of discharging the molding sand in the sand box from the sand box bottom, perhaps adopts the automatic case of turning over of case machine to accomplish the shakeout, this production line has characteristics such as degree of automation is high, production efficiency is high, reliable and stable, energy-concerving and environment-protective.
The lost foam casting steel can be cast after being completely burnt due to the sensitivity of cast steel to carbon in the production process, the existing technology adopts manual mould burning, the whole mould burning process cannot be stable and reliable, and the manual mould burning cannot be controlled in real time through negative pressure of a sand mould, so that a large amount of sand moulds and castings are scrapped due to incomplete mould burning or low negative pressure collapse in the early mould burning casting process in the lost foam casting production, and the problems of improving casting qualification rate and promoting the development of the lost foam casting steel technology are solved in the early mould burning link stable control.
Disclosure of Invention
In order to solve the technical problems, the invention provides the automatic lost foam burning and casting production line with novel design, strong practicability and high automation degree, which can improve the support stability of lost foam casting, reduce the cost and promote the development of the green lost foam casting process.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an automatic lost foam casting production line, which comprises a roller sand box semi-automatic transfer line of a modeling system, a semi-automatic casting vehicle, an automatic mold burning system, a vacuum negative pressure system, a roller sand box semi-automatic transfer line of a casting system and a control cabinet; the roller type sand box semiautomatic transfer line of the molding system is used for conveying the sand box; the molding system is arranged at one side of a semi-automatic transfer line of the roller type sand box of the molding system, and is used for manufacturing sand molds in the sand box; a transfer system is arranged between the input end of the molding system roller type sand box semi-automatic transfer line and the output end of the molding system roller type sand box semi-automatic transfer line and the input end of the pouring system roller type sand box semi-automatic transfer line, and is used for conveying the sand box to the inlet end of the molding system roller type sand box semi-automatic transfer line or transferring the sand box from the molding system roller type sand box semi-automatic transfer line to the pouring system roller type sand box semi-automatic transfer line; the semi-automatic pouring truck is arranged above the semi-automatic transfer line of the roller type sand box of the pouring system and is used for pouring into the sand box; the automatic mold burning system and the vacuum negative pressure system are arranged on the outer side of the pouring system roller type sand box semi-automatic transfer line, and the automatic mold burning system is used for burning molds into a cavity of the sand box; and a control module is arranged in the control cabinet and is electrically connected with the automatic die burning system and the vacuum negative pressure system.
Optionally, the automatic die burning system includes the die burning rifle, the die burning rifle includes flame spraying pipe, oxygen blowing pipe, nozzle and electron ignition device, the one end of flame spraying pipe with the one end of oxygen blowing pipe all with the entrance point of nozzle is linked together, the exit of nozzle is provided with electron ignition device, flame spraying pipe with all be provided with the automatically controlled valve on the oxygen blowing pipe, the automatically controlled valve with electron ignition device all with the control module electricity in the switch board is connected.
Optionally, the automatic die burning system further comprises a height adjusting mechanism, wherein the height adjusting mechanism is used for adjusting the height of the die burning gun; the height adjusting mechanism is electrically connected with a control module in the control cabinet.
Optionally, the height adjusting mechanism comprises a hydraulic cylinder or an air cylinder or a linear motor.
Optionally, the vacuum negative pressure system comprises a vacuum pump and a negative pressure meter; the negative pressure meter is used for monitoring the negative pressure degree of the vacuum pump, and the vacuum pump and the negative pressure meter are electrically connected with a control module in the control cabinet.
Optionally, a control module in the control cabinet monitors that the negative pressure value in the sand mould is lower than 0.015MPa and then automatically stops the mould burning process.
Optionally, the sand box is of uniform size, and the riser position of the sand box corresponds to the casting muzzle of the semi-automatic casting vehicle.
Optionally, the transfer system comprises a track and a transfer trolley; the rail is arranged between the inlet end of the molding system roller type sand box semi-automatic transfer line or the outlet end of the molding system roller type sand box semi-automatic transfer line and the inlet end of the pouring system roller type sand box semi-automatic transfer line, and the transfer trolley is arranged on the rail in a sliding manner.
Compared with the prior art, the invention has the following technical effects:
1. the automatic lost foam burning and casting production line can realize full/semi-automation, and the unique burning system can realize that the model is burnt completely before casting, so as to prevent carburetion on the surface of cast steel.
2. The automatic lost foam casting production line of the invention improves the automation degree and the efficiency, so as to improve the cast steel yield.
3. According to the automatic lost foam casting production line, after foam burning, collecting and centralized treatment is carried out through a vacuum negative pressure system, so that green casting is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the automatic lost foam casting line.
Reference numerals illustrate: 1. a roller sand box semi-automatic transfer line of a modeling system; 2. a sand box; 3. a modeling system; 4. a transfer trolley; 5. a track; 6. semi-automatic pouring truck; 7. an automatic mold burning system; 8. burning a mould gun; 9. a vacuum negative pressure system; 10. semi-automatic transfer line of roller sand box of the pouring system; 11. and a control cabinet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the embodiment provides an automatic lost foam casting production line for burning a mold, which comprises a molding system roller type sand box semiautomatic transfer line 1, a molding system 3, a semiautomatic casting vehicle 6, an automatic mold burning system 7, a vacuum negative pressure system 9, a casting system roller type sand box semiautomatic transfer line 10 and a control cabinet 11; the molding system roller type sand box semiautomatic transfer line 1 is used for conveying sand boxes 2; the molding system 3 is arranged at one side of a molding system roller type sand box semiautomatic transfer line 1, and the molding system 3 is used for manufacturing sand molds in the sand boxes 2; a transfer system is arranged between the input end of the molding system roller type sand box semi-automatic transfer line 1 and the output end of the molding system roller type sand box semi-automatic transfer line 1 and the input end of the pouring system roller type sand box semi-automatic transfer line 10, and is used for conveying the sand box 2 to the inlet end of the molding system roller type sand box semi-automatic transfer line 1 or transferring the sand box 2 from the molding system roller type sand box semi-automatic transfer line 1 to the pouring system roller type sand box semi-automatic transfer line 10; the semi-automatic pouring truck 6 is arranged above a pouring system roller type sand box semi-automatic transfer line 10, and the semi-automatic pouring truck 6 is used for pouring into the sand box 2; the automatic mold burning system 7 and the vacuum negative pressure system 9 are arranged on the outer side of a pouring system roller type sand box semiautomatic transfer line 10, and the automatic mold burning system 7 is used for burning molds into a cavity of the sand box 2; a control module is arranged in the control cabinet 11 and is electrically connected with the automatic die burning system 7 and the vacuum negative pressure system 9.
In this embodiment, the molding system roller type sand box semiautomatic transfer line 1 and the pouring system roller type sand box semiautomatic transfer line 10 are both roller conveyors.
The automatic die burning system 7 comprises a die burning gun 8, the die burning gun 8 comprises a flame spraying pipe, an oxygen blowing pipe, a nozzle and an electronic ignition device, one end of the flame spraying pipe and one end of the oxygen blowing pipe are both communicated with the inlet end of the nozzle, the electronic ignition device is arranged at the outlet end of the nozzle, electric control valves are arranged on the flame spraying pipe and the oxygen blowing pipe, and the electric control valves and the electronic ignition device are electrically connected with a control module in a control cabinet 11. The control module in the control cabinet 11 can automatically control the opening time and the valve opening of the electric control valve, thereby realizing accurate oxygen delivery and fire delivery. The oxygen blowing pipe can fully burn foam, does not generate harmful substances such as CO and the like, can ensure that the die cavity can be burnt completely, and prevents carburetion on the surface of cast steel.
The automatic die burning system 7 further comprises a height adjusting mechanism, wherein the height adjusting mechanism is used for adjusting the height of the die burning gun 8; the height adjusting mechanism is electrically connected with a control module in the control cabinet 11. In this embodiment, the height adjusting mechanism includes a hydraulic cylinder, the die burning gun 8 is connected with the lever free end of the hydraulic cylinder, the hydraulic cylinder is driven by a hydraulic system, the hydraulic system is in control connection with a control module in the control cabinet 11, and the control module in the control cabinet 11 controls the height of the die burning gun 8 according to a preset sintering program, so as to achieve the purpose of fully burning the die in a deep cavity.
The vacuum negative pressure system 9 comprises a vacuum pump and a negative pressure meter; the negative pressure meter is used for monitoring the negative pressure degree of the vacuum pump, and the vacuum pump and the negative pressure meter are electrically connected with a control module in the control cabinet 11. The control cabinet 11 monitors the vacuum degree of the vacuum pump and the vacuum pump in the sand box 2 in the mold burning link, and feeds back the real-time vacuum degree through an electronic signal, so that the start and stop of the mold burning process step are controlled, and the mold burning process is automatically stopped after the pressure is lower than 0.015 MPa.
The sand box 2 is of a uniform size, and the riser position of the sand box 2 corresponds to the casting muzzle of the semi-automatic casting vehicle 6. By fixing the pouring gate position of the sand box 2, the semiautomatic pouring truck 6 can realize fixed-point pouring.
The transfer system comprises a track 5 and a transfer trolley 4; the track 5 is arranged between the inlet end of the molding system roller type sand box semi-automatic transfer line 1 or the outlet end of the molding system roller type sand box semi-automatic transfer line 1 and the inlet end of the pouring system roller type sand box semi-automatic transfer line 10, and the transfer trolley 4 is arranged on the track 5 in a sliding manner.
The invention relates to an automatic lost foam firing and casting production line, which mainly comprises the following working procedures:
the empty sand box 2 is placed on a semi-automatic transfer line 1 of the roller type sand box of the molding system, and moves forward along with the movement of the transfer line, when the empty sand box moves to a station of the molding system 3, the molding system 3 molds, and the manufactured sand mold returns to the semi-automatic transfer line 1 of the roller type sand box of the molding system, moves forward to the tail end of the semi-automatic transfer line 1 of the roller type sand box of the molding system, and is moved to a semi-automatic transfer line 10 of the roller type sand box of the pouring system along a track 5 by a transfer trolley 44. In the pouring step, the sand box 22 is required to be connected into the vacuum negative pressure system 9, then the mouth of the automatic mold burning gun 8 is adjusted to the casting head to burn the mold, the height of the mold burning gun 8 can be adjusted up and down in the mold burning process, the mold is deeply poured into the cavity to burn the mold, so that the cleanliness of the mold is guaranteed, after the mold is checked to be qualified, the poured sand box 2 moves forwards to a cooling area along with the pouring system roller type sand box semiautomatic transfer line 10, the cooled sand box 2 is cleaned after being opened, and the empty sand box 2 is placed on the molding system roller type sand box semiautomatic transfer line 1. The vacuum negative pressure system 9 and the automatic mold burning system 7 are arranged on the pouring system roller type sand box semi-automatic transfer line 10 in a full line mode, and mold burning and pouring procedures can be carried out on any position on the transfer line.
The automatic lost foam casting production line disclosed by the invention is novel in design, strong in practicability and high in automation degree, can improve the support stability of lost foam casting, reduce the cost and promote the development of a green lost foam casting process.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in 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.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. The automatic lost foam casting production line is characterized by comprising a roller type sand box semi-automatic transfer line of a modeling system, the modeling system, a semi-automatic casting vehicle, an automatic casting system, a vacuum negative pressure system, a roller type sand box semi-automatic transfer line of a casting system and a control cabinet; the roller type sand box semiautomatic transfer line of the molding system is used for conveying the sand box; the molding system is arranged at one side of a semi-automatic transfer line of the roller type sand box of the molding system, and is used for manufacturing sand molds in the sand box; a transfer system is arranged between the input end of the molding system roller type sand box semi-automatic transfer line and the output end of the molding system roller type sand box semi-automatic transfer line and the input end of the pouring system roller type sand box semi-automatic transfer line, and is used for conveying the sand box to the inlet end of the molding system roller type sand box semi-automatic transfer line or transferring the sand box from the molding system roller type sand box semi-automatic transfer line to the pouring system roller type sand box semi-automatic transfer line; the semi-automatic pouring truck is arranged above the semi-automatic transfer line of the roller type sand box of the pouring system and is used for pouring into the sand box; the automatic mold burning system and the vacuum negative pressure system are arranged on the outer side of the pouring system roller type sand box semi-automatic transfer line, and the automatic mold burning system is used for burning molds into a cavity of the sand box; and a control module is arranged in the control cabinet and is electrically connected with the automatic die burning system and the vacuum negative pressure system.
2. The automatic lost foam casting production line according to claim 1, wherein the automatic lost foam casting system comprises a casting gun, the casting gun comprises a flame spraying pipe, an oxygen blowing pipe, a nozzle and an electronic ignition device, one end of the flame spraying pipe and one end of the oxygen blowing pipe are both communicated with the inlet end of the nozzle, the electronic ignition device is arranged at the outlet end of the nozzle, the flame spraying pipe and the oxygen blowing pipe are both provided with an electric control valve, and the electric control valve and the electronic ignition device are both electrically connected with a control module in the control cabinet.
3. The lost foam automatic firing casting line according to claim 2, wherein the automatic firing system further comprises a height adjustment mechanism for adjusting the height of the firing gun; the height adjusting mechanism is electrically connected with a control module in the control cabinet.
4. A lost foam automatic firing casting line according to claim 3, wherein the height adjustment mechanism comprises a hydraulic or pneumatic cylinder or a linear motor.
5. The lost foam automatic firing casting production line according to claim 1, wherein the vacuum negative pressure system comprises a vacuum pump and a negative pressure gauge; the negative pressure meter is used for monitoring the negative pressure degree of the vacuum pump, and the vacuum pump and the negative pressure meter are electrically connected with a control module in the control cabinet.
6. The automatic lost foam casting production line according to claim 5, wherein the control module in the control cabinet monitors that the negative pressure value in the sand mold is lower than 0.015MPa and then automatically stops the mold burning process.
7. The lost foam automatic firing casting line according to claim 1, wherein the sand boxes are of uniform size, and riser positions of the sand boxes correspond to casting muzzles of the semi-automatic casting vehicle.
8. The lost foam automatic firing casting line of claim 1, wherein the transfer system comprises a rail and a transfer trolley; the rail is arranged between the inlet end of the molding system roller type sand box semi-automatic transfer line or the outlet end of the molding system roller type sand box semi-automatic transfer line and the inlet end of the pouring system roller type sand box semi-automatic transfer line, and the transfer trolley is arranged on the rail in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211682101.2A CN116159991A (en) | 2022-12-27 | 2022-12-27 | Automatic lost foam firing and casting production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211682101.2A CN116159991A (en) | 2022-12-27 | 2022-12-27 | Automatic lost foam firing and casting production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116159991A true CN116159991A (en) | 2023-05-26 |
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ID=86421185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211682101.2A Pending CN116159991A (en) | 2022-12-27 | 2022-12-27 | Automatic lost foam firing and casting production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116159991A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214138A (en) * | 2008-03-11 | 2009-09-24 | Sintokogio Ltd | Facility and method for sand mold press casting |
| CN101767186A (en) * | 2010-01-05 | 2010-07-07 | 河北冀凯铸业有限公司 | Method for preventing crush of lost foam casting product |
| CN206382557U (en) * | 2016-12-29 | 2017-08-08 | 北京天哲消失模铸造技术有限公司 | Energy-efficient aluminium alloy lost foam foundry production line |
| CN208116754U (en) * | 2018-05-02 | 2018-11-20 | 福建省景发机械配件有限公司 | A kind of Lost Form Casting Production Line |
| CN209598134U (en) * | 2019-03-25 | 2019-11-08 | 十堰众柴发动机部件制造有限公司 | A kind of negative pressure system of lost foam casting teeming line |
-
2022
- 2022-12-27 CN CN202211682101.2A patent/CN116159991A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214138A (en) * | 2008-03-11 | 2009-09-24 | Sintokogio Ltd | Facility and method for sand mold press casting |
| CN101767186A (en) * | 2010-01-05 | 2010-07-07 | 河北冀凯铸业有限公司 | Method for preventing crush of lost foam casting product |
| CN206382557U (en) * | 2016-12-29 | 2017-08-08 | 北京天哲消失模铸造技术有限公司 | Energy-efficient aluminium alloy lost foam foundry production line |
| CN208116754U (en) * | 2018-05-02 | 2018-11-20 | 福建省景发机械配件有限公司 | A kind of Lost Form Casting Production Line |
| CN209598134U (en) * | 2019-03-25 | 2019-11-08 | 十堰众柴发动机部件制造有限公司 | A kind of negative pressure system of lost foam casting teeming line |
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